--- /dev/null
+This directory includes a copy of the Independent JPEG Group's JPEG
+library (see the README file for more information). Not all the files
+from the original distribution have been included into the TightVNC
+codebase. To obtain the original library, please see the README file,
+section "ARCHIVE LOCATIONS".
+++ /dev/null
-.TH ANSI2KNR 1 "19 Jan 1996"
-.SH NAME
-ansi2knr \- convert ANSI C to Kernighan & Ritchie C
-.SH SYNOPSIS
-.I ansi2knr
-[--varargs] input_file [output_file]
-.SH DESCRIPTION
-If no output_file is supplied, output goes to stdout.
-.br
-There are no error messages.
-.sp
-.I ansi2knr
-recognizes function definitions by seeing a non-keyword identifier at the left
-margin, followed by a left parenthesis, with a right parenthesis as the last
-character on the line, and with a left brace as the first token on the
-following line (ignoring possible intervening comments). It will recognize a
-multi-line header provided that no intervening line ends with a left or right
-brace or a semicolon. These algorithms ignore whitespace and comments, except
-that the function name must be the first thing on the line.
-.sp
-The following constructs will confuse it:
-.br
- - Any other construct that starts at the left margin and follows the
-above syntax (such as a macro or function call).
-.br
- - Some macros that tinker with the syntax of the function header.
-.sp
-The --varargs switch is obsolete, and is recognized only for
-backwards compatibility. The present version of
-.I ansi2knr
-will always attempt to convert a ... argument to va_alist and va_dcl.
-.SH AUTHOR
-L. Peter Deutsch <ghost@aladdin.com> wrote the original ansi2knr and
-continues to maintain the current version; most of the code in the current
-version is his work. ansi2knr also includes contributions by Francois
-Pinard <pinard@iro.umontreal.ca> and Jim Avera <jima@netcom.com>.
+++ /dev/null
-/* ansi2knr.c */
-/* Convert ANSI C function definitions to K&R ("traditional C") syntax */
-
-/*
-ansi2knr is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone for the
-consequences of using it or for whether it serves any particular purpose or
-works at all, unless he says so in writing. Refer to the GNU General Public
-License (the "GPL") for full details.
-
-Everyone is granted permission to copy, modify and redistribute ansi2knr,
-but only under the conditions described in the GPL. A copy of this license
-is supposed to have been given to you along with ansi2knr so you can know
-your rights and responsibilities. It should be in a file named COPYLEFT.
-[In the IJG distribution, the GPL appears below, not in a separate file.]
-Among other things, the copyright notice and this notice must be preserved
-on all copies.
-
-We explicitly state here what we believe is already implied by the GPL: if
-the ansi2knr program is distributed as a separate set of sources and a
-separate executable file which are aggregated on a storage medium together
-with another program, this in itself does not bring the other program under
-the GPL, nor does the mere fact that such a program or the procedures for
-constructing it invoke the ansi2knr executable bring any other part of the
-program under the GPL.
-*/
-
-/*
----------- Here is the GNU GPL file COPYLEFT, referred to above ----------
------ These terms do NOT apply to the JPEG software itself; see README ------
-
- GHOSTSCRIPT GENERAL PUBLIC LICENSE
- (Clarified 11 Feb 1988)
-
- Copyright (C) 1988 Richard M. Stallman
- Everyone is permitted to copy and distribute verbatim copies of this
- license, but changing it is not allowed. You can also use this wording
- to make the terms for other programs.
-
- The license agreements of most software companies keep you at the
-mercy of those companies. By contrast, our general public license is
-intended to give everyone the right to share Ghostscript. To make sure
-that you get the rights we want you to have, we need to make
-restrictions that forbid anyone to deny you these rights or to ask you
-to surrender the rights. Hence this license agreement.
-
- Specifically, we want to make sure that you have the right to give
-away copies of Ghostscript, that you receive source code or else can get
-it if you want it, that you can change Ghostscript or use pieces of it
-in new free programs, and that you know you can do these things.
-
- To make sure that everyone has such rights, we have to forbid you to
-deprive anyone else of these rights. For example, if you distribute
-copies of Ghostscript, you must give the recipients all the rights that
-you have. You must make sure that they, too, receive or can get the
-source code. And you must tell them their rights.
-
- Also, for our own protection, we must make certain that everyone finds
-out that there is no warranty for Ghostscript. If Ghostscript is
-modified by someone else and passed on, we want its recipients to know
-that what they have is not what we distributed, so that any problems
-introduced by others will not reflect on our reputation.
-
- Therefore we (Richard M. Stallman and the Free Software Foundation,
-Inc.) make the following terms which say what you must do to be allowed
-to distribute or change Ghostscript.
-
-
- COPYING POLICIES
-
- 1. You may copy and distribute verbatim copies of Ghostscript source
-code as you receive it, in any medium, provided that you conspicuously
-and appropriately publish on each copy a valid copyright and license
-notice "Copyright (C) 1989 Aladdin Enterprises. All rights reserved.
-Distributed by Free Software Foundation, Inc." (or with whatever year is
-appropriate); keep intact the notices on all files that refer to this
-License Agreement and to the absence of any warranty; and give any other
-recipients of the Ghostscript program a copy of this License Agreement
-along with the program. You may charge a distribution fee for the
-physical act of transferring a copy.
-
- 2. You may modify your copy or copies of Ghostscript or any portion of
-it, and copy and distribute such modifications under the terms of
-Paragraph 1 above, provided that you also do the following:
-
- a) cause the modified files to carry prominent notices stating
- that you changed the files and the date of any change; and
-
- b) cause the whole of any work that you distribute or publish,
- that in whole or in part contains or is a derivative of Ghostscript
- or any part thereof, to be licensed at no charge to all third
- parties on terms identical to those contained in this License
- Agreement (except that you may choose to grant more extensive
- warranty protection to some or all third parties, at your option).
-
- c) You may charge a distribution fee for the physical act of
- transferring a copy, and you may at your option offer warranty
- protection in exchange for a fee.
-
-Mere aggregation of another unrelated program with this program (or its
-derivative) on a volume of a storage or distribution medium does not bring
-the other program under the scope of these terms.
-
- 3. You may copy and distribute Ghostscript (or a portion or derivative
-of it, under Paragraph 2) in object code or executable form under the
-terms of Paragraphs 1 and 2 above provided that you also do one of the
-following:
-
- a) accompany it with the complete corresponding machine-readable
- source code, which must be distributed under the terms of
- Paragraphs 1 and 2 above; or,
-
- b) accompany it with a written offer, valid for at least three
- years, to give any third party free (except for a nominal
- shipping charge) a complete machine-readable copy of the
- corresponding source code, to be distributed under the terms of
- Paragraphs 1 and 2 above; or,
-
- c) accompany it with the information you received as to where the
- corresponding source code may be obtained. (This alternative is
- allowed only for noncommercial distribution and only if you
- received the program in object code or executable form alone.)
-
-For an executable file, complete source code means all the source code for
-all modules it contains; but, as a special exception, it need not include
-source code for modules which are standard libraries that accompany the
-operating system on which the executable file runs.
-
- 4. You may not copy, sublicense, distribute or transfer Ghostscript
-except as expressly provided under this License Agreement. Any attempt
-otherwise to copy, sublicense, distribute or transfer Ghostscript is
-void and your rights to use the program under this License agreement
-shall be automatically terminated. However, parties who have received
-computer software programs from you with this License Agreement will not
-have their licenses terminated so long as such parties remain in full
-compliance.
-
- 5. If you wish to incorporate parts of Ghostscript into other free
-programs whose distribution conditions are different, write to the Free
-Software Foundation at 675 Mass Ave, Cambridge, MA 02139. We have not
-yet worked out a simple rule that can be stated here, but we will often
-permit this. We will be guided by the two goals of preserving the free
-status of all derivatives of our free software and of promoting the
-sharing and reuse of software.
-
-Your comments and suggestions about our licensing policies and our
-software are welcome! Please contact the Free Software Foundation,
-Inc., 675 Mass Ave, Cambridge, MA 02139, or call (617) 876-3296.
-
- NO WARRANTY
-
- BECAUSE GHOSTSCRIPT IS LICENSED FREE OF CHARGE, WE PROVIDE ABSOLUTELY
-NO WARRANTY, TO THE EXTENT PERMITTED BY APPLICABLE STATE LAW. EXCEPT
-WHEN OTHERWISE STATED IN WRITING, FREE SOFTWARE FOUNDATION, INC, RICHARD
-M. STALLMAN, ALADDIN ENTERPRISES, L. PETER DEUTSCH, AND/OR OTHER PARTIES
-PROVIDE GHOSTSCRIPT "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
-EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
-ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF GHOSTSCRIPT IS WITH
-YOU. SHOULD GHOSTSCRIPT PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
-NECESSARY SERVICING, REPAIR OR CORRECTION.
-
- IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW WILL RICHARD M.
-STALLMAN, THE FREE SOFTWARE FOUNDATION, INC., L. PETER DEUTSCH, ALADDIN
-ENTERPRISES, AND/OR ANY OTHER PARTY WHO MAY MODIFY AND REDISTRIBUTE
-GHOSTSCRIPT AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING
-ANY LOST PROFITS, LOST MONIES, OR OTHER SPECIAL, INCIDENTAL OR
-CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
-(INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
-INACCURATE OR LOSSES SUSTAINED BY THIRD PARTIES OR A FAILURE OF THE
-PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS) GHOSTSCRIPT, EVEN IF YOU
-HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM
-BY ANY OTHER PARTY.
-
--------------------- End of file COPYLEFT ------------------------------
-*/
-
-/*
- * Usage:
- ansi2knr input_file [output_file]
- * If no output_file is supplied, output goes to stdout.
- * There are no error messages.
- *
- * ansi2knr recognizes function definitions by seeing a non-keyword
- * identifier at the left margin, followed by a left parenthesis,
- * with a right parenthesis as the last character on the line,
- * and with a left brace as the first token on the following line
- * (ignoring possible intervening comments).
- * It will recognize a multi-line header provided that no intervening
- * line ends with a left or right brace or a semicolon.
- * These algorithms ignore whitespace and comments, except that
- * the function name must be the first thing on the line.
- * The following constructs will confuse it:
- * - Any other construct that starts at the left margin and
- * follows the above syntax (such as a macro or function call).
- * - Some macros that tinker with the syntax of the function header.
- */
-
-/*
- * The original and principal author of ansi2knr is L. Peter Deutsch
- * <ghost@aladdin.com>. Other authors are noted in the change history
- * that follows (in reverse chronological order):
- lpd 96-01-21 added code to cope with not HAVE_CONFIG_H and with
- compilers that don't understand void, as suggested by
- Tom Lane
- lpd 96-01-15 changed to require that the first non-comment token
- on the line following a function header be a left brace,
- to reduce sensitivity to macros, as suggested by Tom Lane
- <tgl@sss.pgh.pa.us>
- lpd 95-06-22 removed #ifndefs whose sole purpose was to define
- undefined preprocessor symbols as 0; changed all #ifdefs
- for configuration symbols to #ifs
- lpd 95-04-05 changed copyright notice to make it clear that
- including ansi2knr in a program does not bring the entire
- program under the GPL
- lpd 94-12-18 added conditionals for systems where ctype macros
- don't handle 8-bit characters properly, suggested by
- Francois Pinard <pinard@iro.umontreal.ca>;
- removed --varargs switch (this is now the default)
- lpd 94-10-10 removed CONFIG_BROKETS conditional
- lpd 94-07-16 added some conditionals to help GNU `configure',
- suggested by Francois Pinard <pinard@iro.umontreal.ca>;
- properly erase prototype args in function parameters,
- contributed by Jim Avera <jima@netcom.com>;
- correct error in writeblanks (it shouldn't erase EOLs)
- lpd 89-xx-xx original version
- */
-
-/* Most of the conditionals here are to make ansi2knr work with */
-/* or without the GNU configure machinery. */
-
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include <stdio.h>
-#include <ctype.h>
-
-#if HAVE_CONFIG_H
-
-/*
- For properly autoconfiguring ansi2knr, use AC_CONFIG_HEADER(config.h).
- This will define HAVE_CONFIG_H and so, activate the following lines.
- */
-
-# if STDC_HEADERS || HAVE_STRING_H
-# include <string.h>
-# else
-# include <strings.h>
-# endif
-
-#else /* not HAVE_CONFIG_H */
-
-/* Otherwise do it the hard way */
-
-# ifdef BSD
-# include <strings.h>
-# else
-# ifdef VMS
- extern int strlen(), strncmp();
-# else
-# include <string.h>
-# endif
-# endif
-
-#endif /* not HAVE_CONFIG_H */
-
-#if STDC_HEADERS
-# include <stdlib.h>
-#else
-/*
- malloc and free should be declared in stdlib.h,
- but if you've got a K&R compiler, they probably aren't.
- */
-# ifdef MSDOS
-# include <malloc.h>
-# else
-# ifdef VMS
- extern char *malloc();
- extern void free();
-# else
- extern char *malloc();
- extern int free();
-# endif
-# endif
-
-#endif
-
-/*
- * The ctype macros don't always handle 8-bit characters correctly.
- * Compensate for this here.
- */
-#ifdef isascii
-# undef HAVE_ISASCII /* just in case */
-# define HAVE_ISASCII 1
-#else
-#endif
-#if STDC_HEADERS || !HAVE_ISASCII
-# define is_ascii(c) 1
-#else
-# define is_ascii(c) isascii(c)
-#endif
-
-#define is_space(c) (is_ascii(c) && isspace(c))
-#define is_alpha(c) (is_ascii(c) && isalpha(c))
-#define is_alnum(c) (is_ascii(c) && isalnum(c))
-
-/* Scanning macros */
-#define isidchar(ch) (is_alnum(ch) || (ch) == '_')
-#define isidfirstchar(ch) (is_alpha(ch) || (ch) == '_')
-
-/* Forward references */
-char *skipspace();
-int writeblanks();
-int test1();
-int convert1();
-
-/* The main program */
-int
-main(argc, argv)
- int argc;
- char *argv[];
-{ FILE *in, *out;
-#define bufsize 5000 /* arbitrary size */
- char *buf;
- char *line;
- char *more;
- /*
- * In previous versions, ansi2knr recognized a --varargs switch.
- * If this switch was supplied, ansi2knr would attempt to convert
- * a ... argument to va_alist and va_dcl; if this switch was not
- * supplied, ansi2knr would simply drop any such arguments.
- * Now, ansi2knr always does this conversion, and we only
- * check for this switch for backward compatibility.
- */
- int convert_varargs = 1;
-
- if ( argc > 1 && argv[1][0] == '-' )
- { if ( !strcmp(argv[1], "--varargs") )
- { convert_varargs = 1;
- argc--;
- argv++;
- }
- else
- { fprintf(stderr, "Unrecognized switch: %s\n", argv[1]);
- exit(1);
- }
- }
- switch ( argc )
- {
- default:
- printf("Usage: ansi2knr input_file [output_file]\n");
- exit(0);
- case 2:
- out = stdout;
- break;
- case 3:
- out = fopen(argv[2], "w");
- if ( out == NULL )
- { fprintf(stderr, "Cannot open output file %s\n", argv[2]);
- exit(1);
- }
- }
- in = fopen(argv[1], "r");
- if ( in == NULL )
- { fprintf(stderr, "Cannot open input file %s\n", argv[1]);
- exit(1);
- }
- fprintf(out, "#line 1 \"%s\"\n", argv[1]);
- buf = malloc(bufsize);
- line = buf;
- while ( fgets(line, (unsigned)(buf + bufsize - line), in) != NULL )
- {
-test: line += strlen(line);
- switch ( test1(buf) )
- {
- case 2: /* a function header */
- convert1(buf, out, 1, convert_varargs);
- break;
- case 1: /* a function */
- /* Check for a { at the start of the next line. */
- more = ++line;
-f: if ( line >= buf + (bufsize - 1) ) /* overflow check */
- goto wl;
- if ( fgets(line, (unsigned)(buf + bufsize - line), in) == NULL )
- goto wl;
- switch ( *skipspace(more, 1) )
- {
- case '{':
- /* Definitely a function header. */
- convert1(buf, out, 0, convert_varargs);
- fputs(more, out);
- break;
- case 0:
- /* The next line was blank or a comment: */
- /* keep scanning for a non-comment. */
- line += strlen(line);
- goto f;
- default:
- /* buf isn't a function header, but */
- /* more might be. */
- fputs(buf, out);
- strcpy(buf, more);
- line = buf;
- goto test;
- }
- break;
- case -1: /* maybe the start of a function */
- if ( line != buf + (bufsize - 1) ) /* overflow check */
- continue;
- /* falls through */
- default: /* not a function */
-wl: fputs(buf, out);
- break;
- }
- line = buf;
- }
- if ( line != buf )
- fputs(buf, out);
- free(buf);
- fclose(out);
- fclose(in);
- return 0;
-}
-
-/* Skip over space and comments, in either direction. */
-char *
-skipspace(p, dir)
- register char *p;
- register int dir; /* 1 for forward, -1 for backward */
-{ for ( ; ; )
- { while ( is_space(*p) )
- p += dir;
- if ( !(*p == '/' && p[dir] == '*') )
- break;
- p += dir; p += dir;
- while ( !(*p == '*' && p[dir] == '/') )
- { if ( *p == 0 )
- return p; /* multi-line comment?? */
- p += dir;
- }
- p += dir; p += dir;
- }
- return p;
-}
-
-/*
- * Write blanks over part of a string.
- * Don't overwrite end-of-line characters.
- */
-int
-writeblanks(start, end)
- char *start;
- char *end;
-{ char *p;
- for ( p = start; p < end; p++ )
- if ( *p != '\r' && *p != '\n' )
- *p = ' ';
- return 0;
-}
-
-/*
- * Test whether the string in buf is a function definition.
- * The string may contain and/or end with a newline.
- * Return as follows:
- * 0 - definitely not a function definition;
- * 1 - definitely a function definition;
- * 2 - definitely a function prototype (NOT USED);
- * -1 - may be the beginning of a function definition,
- * append another line and look again.
- * The reason we don't attempt to convert function prototypes is that
- * Ghostscript's declaration-generating macros look too much like
- * prototypes, and confuse the algorithms.
- */
-int
-test1(buf)
- char *buf;
-{ register char *p = buf;
- char *bend;
- char *endfn;
- int contin;
-
- if ( !isidfirstchar(*p) )
- return 0; /* no name at left margin */
- bend = skipspace(buf + strlen(buf) - 1, -1);
- switch ( *bend )
- {
- case ';': contin = 0 /*2*/; break;
- case ')': contin = 1; break;
- case '{': return 0; /* not a function */
- case '}': return 0; /* not a function */
- default: contin = -1;
- }
- while ( isidchar(*p) )
- p++;
- endfn = p;
- p = skipspace(p, 1);
- if ( *p++ != '(' )
- return 0; /* not a function */
- p = skipspace(p, 1);
- if ( *p == ')' )
- return 0; /* no parameters */
- /* Check that the apparent function name isn't a keyword. */
- /* We only need to check for keywords that could be followed */
- /* by a left parenthesis (which, unfortunately, is most of them). */
- { static char *words[] =
- { "asm", "auto", "case", "char", "const", "double",
- "extern", "float", "for", "if", "int", "long",
- "register", "return", "short", "signed", "sizeof",
- "static", "switch", "typedef", "unsigned",
- "void", "volatile", "while", 0
- };
- char **key = words;
- char *kp;
- int len = endfn - buf;
-
- while ( (kp = *key) != 0 )
- { if ( strlen(kp) == len && !strncmp(kp, buf, len) )
- return 0; /* name is a keyword */
- key++;
- }
- }
- return contin;
-}
-
-/* Convert a recognized function definition or header to K&R syntax. */
-int
-convert1(buf, out, header, convert_varargs)
- char *buf;
- FILE *out;
- int header; /* Boolean */
- int convert_varargs; /* Boolean */
-{ char *endfn;
- register char *p;
- char **breaks;
- unsigned num_breaks = 2; /* for testing */
- char **btop;
- char **bp;
- char **ap;
- char *vararg = 0;
-
- /* Pre-ANSI implementations don't agree on whether strchr */
- /* is called strchr or index, so we open-code it here. */
- for ( endfn = buf; *(endfn++) != '('; )
- ;
-top: p = endfn;
- breaks = (char **)malloc(sizeof(char *) * num_breaks * 2);
- if ( breaks == 0 )
- { /* Couldn't allocate break table, give up */
- fprintf(stderr, "Unable to allocate break table!\n");
- fputs(buf, out);
- return -1;
- }
- btop = breaks + num_breaks * 2 - 2;
- bp = breaks;
- /* Parse the argument list */
- do
- { int level = 0;
- char *lp = NULL;
- char *rp;
- char *end = NULL;
-
- if ( bp >= btop )
- { /* Filled up break table. */
- /* Allocate a bigger one and start over. */
- free((char *)breaks);
- num_breaks <<= 1;
- goto top;
- }
- *bp++ = p;
- /* Find the end of the argument */
- for ( ; end == NULL; p++ )
- { switch(*p)
- {
- case ',':
- if ( !level ) end = p;
- break;
- case '(':
- if ( !level ) lp = p;
- level++;
- break;
- case ')':
- if ( --level < 0 ) end = p;
- else rp = p;
- break;
- case '/':
- p = skipspace(p, 1) - 1;
- break;
- default:
- ;
- }
- }
- /* Erase any embedded prototype parameters. */
- if ( lp )
- writeblanks(lp + 1, rp);
- p--; /* back up over terminator */
- /* Find the name being declared. */
- /* This is complicated because of procedure and */
- /* array modifiers. */
- for ( ; ; )
- { p = skipspace(p - 1, -1);
- switch ( *p )
- {
- case ']': /* skip array dimension(s) */
- case ')': /* skip procedure args OR name */
- { int level = 1;
- while ( level )
- switch ( *--p )
- {
- case ']': case ')': level++; break;
- case '[': case '(': level--; break;
- case '/': p = skipspace(p, -1) + 1; break;
- default: ;
- }
- }
- if ( *p == '(' && *skipspace(p + 1, 1) == '*' )
- { /* We found the name being declared */
- while ( !isidfirstchar(*p) )
- p = skipspace(p, 1) + 1;
- goto found;
- }
- break;
- default:
- goto found;
- }
- }
-found: if ( *p == '.' && p[-1] == '.' && p[-2] == '.' )
- { if ( convert_varargs )
- { *bp++ = "va_alist";
- vararg = p-2;
- }
- else
- { p++;
- if ( bp == breaks + 1 ) /* sole argument */
- writeblanks(breaks[0], p);
- else
- writeblanks(bp[-1] - 1, p);
- bp--;
- }
- }
- else
- { while ( isidchar(*p) ) p--;
- *bp++ = p+1;
- }
- p = end;
- }
- while ( *p++ == ',' );
- *bp = p;
- /* Make a special check for 'void' arglist */
- if ( bp == breaks+2 )
- { p = skipspace(breaks[0], 1);
- if ( !strncmp(p, "void", 4) )
- { p = skipspace(p+4, 1);
- if ( p == breaks[2] - 1 )
- { bp = breaks; /* yup, pretend arglist is empty */
- writeblanks(breaks[0], p + 1);
- }
- }
- }
- /* Put out the function name and left parenthesis. */
- p = buf;
- while ( p != endfn ) putc(*p, out), p++;
- /* Put out the declaration. */
- if ( header )
- { fputs(");", out);
- for ( p = breaks[0]; *p; p++ )
- if ( *p == '\r' || *p == '\n' )
- putc(*p, out);
- }
- else
- { for ( ap = breaks+1; ap < bp; ap += 2 )
- { p = *ap;
- while ( isidchar(*p) )
- putc(*p, out), p++;
- if ( ap < bp - 1 )
- fputs(", ", out);
- }
- fputs(") ", out);
- /* Put out the argument declarations */
- for ( ap = breaks+2; ap <= bp; ap += 2 )
- (*ap)[-1] = ';';
- if ( vararg != 0 )
- { *vararg = 0;
- fputs(breaks[0], out); /* any prior args */
- fputs("va_dcl", out); /* the final arg */
- fputs(bp[0], out);
- }
- else
- fputs(breaks[0], out);
- }
- free((char *)breaks);
- return 0;
-}
+++ /dev/null
-/*
- * cderror.h
- *
- * Copyright (C) 1994-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file defines the error and message codes for the cjpeg/djpeg
- * applications. These strings are not needed as part of the JPEG library
- * proper.
- * Edit this file to add new codes, or to translate the message strings to
- * some other language.
- */
-
-/*
- * To define the enum list of message codes, include this file without
- * defining macro JMESSAGE. To create a message string table, include it
- * again with a suitable JMESSAGE definition (see jerror.c for an example).
- */
-#ifndef JMESSAGE
-#ifndef CDERROR_H
-#define CDERROR_H
-/* First time through, define the enum list */
-#define JMAKE_ENUM_LIST
-#else
-/* Repeated inclusions of this file are no-ops unless JMESSAGE is defined */
-#define JMESSAGE(code,string)
-#endif /* CDERROR_H */
-#endif /* JMESSAGE */
-
-#ifdef JMAKE_ENUM_LIST
-
-typedef enum {
-
-#define JMESSAGE(code,string) code ,
-
-#endif /* JMAKE_ENUM_LIST */
-
-JMESSAGE(JMSG_FIRSTADDONCODE=1000, NULL) /* Must be first entry! */
-
-#ifdef BMP_SUPPORTED
-JMESSAGE(JERR_BMP_BADCMAP, "Unsupported BMP colormap format")
-JMESSAGE(JERR_BMP_BADDEPTH, "Only 8- and 24-bit BMP files are supported")
-JMESSAGE(JERR_BMP_BADHEADER, "Invalid BMP file: bad header length")
-JMESSAGE(JERR_BMP_BADPLANES, "Invalid BMP file: biPlanes not equal to 1")
-JMESSAGE(JERR_BMP_COLORSPACE, "BMP output must be grayscale or RGB")
-JMESSAGE(JERR_BMP_COMPRESSED, "Sorry, compressed BMPs not yet supported")
-JMESSAGE(JERR_BMP_NOT, "Not a BMP file - does not start with BM")
-JMESSAGE(JTRC_BMP, "%ux%u 24-bit BMP image")
-JMESSAGE(JTRC_BMP_MAPPED, "%ux%u 8-bit colormapped BMP image")
-JMESSAGE(JTRC_BMP_OS2, "%ux%u 24-bit OS2 BMP image")
-JMESSAGE(JTRC_BMP_OS2_MAPPED, "%ux%u 8-bit colormapped OS2 BMP image")
-#endif /* BMP_SUPPORTED */
-
-#ifdef GIF_SUPPORTED
-JMESSAGE(JERR_GIF_BUG, "GIF output got confused")
-JMESSAGE(JERR_GIF_CODESIZE, "Bogus GIF codesize %d")
-JMESSAGE(JERR_GIF_COLORSPACE, "GIF output must be grayscale or RGB")
-JMESSAGE(JERR_GIF_IMAGENOTFOUND, "Too few images in GIF file")
-JMESSAGE(JERR_GIF_NOT, "Not a GIF file")
-JMESSAGE(JTRC_GIF, "%ux%ux%d GIF image")
-JMESSAGE(JTRC_GIF_BADVERSION,
- "Warning: unexpected GIF version number '%c%c%c'")
-JMESSAGE(JTRC_GIF_EXTENSION, "Ignoring GIF extension block of type 0x%02x")
-JMESSAGE(JTRC_GIF_NONSQUARE, "Caution: nonsquare pixels in input")
-JMESSAGE(JWRN_GIF_BADDATA, "Corrupt data in GIF file")
-JMESSAGE(JWRN_GIF_CHAR, "Bogus char 0x%02x in GIF file, ignoring")
-JMESSAGE(JWRN_GIF_ENDCODE, "Premature end of GIF image")
-JMESSAGE(JWRN_GIF_NOMOREDATA, "Ran out of GIF bits")
-#endif /* GIF_SUPPORTED */
-
-#ifdef PPM_SUPPORTED
-JMESSAGE(JERR_PPM_COLORSPACE, "PPM output must be grayscale or RGB")
-JMESSAGE(JERR_PPM_NONNUMERIC, "Nonnumeric data in PPM file")
-JMESSAGE(JERR_PPM_NOT, "Not a PPM/PGM file")
-JMESSAGE(JTRC_PGM, "%ux%u PGM image")
-JMESSAGE(JTRC_PGM_TEXT, "%ux%u text PGM image")
-JMESSAGE(JTRC_PPM, "%ux%u PPM image")
-JMESSAGE(JTRC_PPM_TEXT, "%ux%u text PPM image")
-#endif /* PPM_SUPPORTED */
-
-#ifdef RLE_SUPPORTED
-JMESSAGE(JERR_RLE_BADERROR, "Bogus error code from RLE library")
-JMESSAGE(JERR_RLE_COLORSPACE, "RLE output must be grayscale or RGB")
-JMESSAGE(JERR_RLE_DIMENSIONS, "Image dimensions (%ux%u) too large for RLE")
-JMESSAGE(JERR_RLE_EMPTY, "Empty RLE file")
-JMESSAGE(JERR_RLE_EOF, "Premature EOF in RLE header")
-JMESSAGE(JERR_RLE_MEM, "Insufficient memory for RLE header")
-JMESSAGE(JERR_RLE_NOT, "Not an RLE file")
-JMESSAGE(JERR_RLE_TOOMANYCHANNELS, "Cannot handle %d output channels for RLE")
-JMESSAGE(JERR_RLE_UNSUPPORTED, "Cannot handle this RLE setup")
-JMESSAGE(JTRC_RLE, "%ux%u full-color RLE file")
-JMESSAGE(JTRC_RLE_FULLMAP, "%ux%u full-color RLE file with map of length %d")
-JMESSAGE(JTRC_RLE_GRAY, "%ux%u grayscale RLE file")
-JMESSAGE(JTRC_RLE_MAPGRAY, "%ux%u grayscale RLE file with map of length %d")
-JMESSAGE(JTRC_RLE_MAPPED, "%ux%u colormapped RLE file with map of length %d")
-#endif /* RLE_SUPPORTED */
-
-#ifdef TARGA_SUPPORTED
-JMESSAGE(JERR_TGA_BADCMAP, "Unsupported Targa colormap format")
-JMESSAGE(JERR_TGA_BADPARMS, "Invalid or unsupported Targa file")
-JMESSAGE(JERR_TGA_COLORSPACE, "Targa output must be grayscale or RGB")
-JMESSAGE(JTRC_TGA, "%ux%u RGB Targa image")
-JMESSAGE(JTRC_TGA_GRAY, "%ux%u grayscale Targa image")
-JMESSAGE(JTRC_TGA_MAPPED, "%ux%u colormapped Targa image")
-#else
-JMESSAGE(JERR_TGA_NOTCOMP, "Targa support was not compiled")
-#endif /* TARGA_SUPPORTED */
-
-JMESSAGE(JERR_BAD_CMAP_FILE,
- "Color map file is invalid or of unsupported format")
-JMESSAGE(JERR_TOO_MANY_COLORS,
- "Output file format cannot handle %d colormap entries")
-JMESSAGE(JERR_UNGETC_FAILED, "ungetc failed")
-#ifdef TARGA_SUPPORTED
-JMESSAGE(JERR_UNKNOWN_FORMAT,
- "Unrecognized input file format --- perhaps you need -targa")
-#else
-JMESSAGE(JERR_UNKNOWN_FORMAT, "Unrecognized input file format")
-#endif
-JMESSAGE(JERR_UNSUPPORTED_FORMAT, "Unsupported output file format")
-
-#ifdef JMAKE_ENUM_LIST
-
- JMSG_LASTADDONCODE
-} ADDON_MESSAGE_CODE;
-
-#undef JMAKE_ENUM_LIST
-#endif /* JMAKE_ENUM_LIST */
-
-/* Zap JMESSAGE macro so that future re-inclusions do nothing by default */
-#undef JMESSAGE
+++ /dev/null
-/*
- * cdjpeg.c
- *
- * Copyright (C) 1991-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains common support routines used by the IJG application
- * programs (cjpeg, djpeg, jpegtran).
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-#include <ctype.h> /* to declare isupper(), tolower() */
-#ifdef NEED_SIGNAL_CATCHER
-#include <signal.h> /* to declare signal() */
-#endif
-#ifdef USE_SETMODE
-#include <fcntl.h> /* to declare setmode()'s parameter macros */
-/* If you have setmode() but not <io.h>, just delete this line: */
-#include <io.h> /* to declare setmode() */
-#endif
-
-
-/*
- * Signal catcher to ensure that temporary files are removed before aborting.
- * NB: for Amiga Manx C this is actually a global routine named _abort();
- * we put "#define signal_catcher _abort" in jconfig.h. Talk about bogus...
- */
-
-#ifdef NEED_SIGNAL_CATCHER
-
-static j_common_ptr sig_cinfo;
-
-void /* must be global for Manx C */
-signal_catcher (int signum)
-{
- if (sig_cinfo != NULL) {
- if (sig_cinfo->err != NULL) /* turn off trace output */
- sig_cinfo->err->trace_level = 0;
- jpeg_destroy(sig_cinfo); /* clean up memory allocation & temp files */
- }
- exit(EXIT_FAILURE);
-}
-
-
-GLOBAL(void)
-enable_signal_catcher (j_common_ptr cinfo)
-{
- sig_cinfo = cinfo;
-#ifdef SIGINT /* not all systems have SIGINT */
- signal(SIGINT, signal_catcher);
-#endif
-#ifdef SIGTERM /* not all systems have SIGTERM */
- signal(SIGTERM, signal_catcher);
-#endif
-}
-
-#endif
-
-
-/*
- * Optional progress monitor: display a percent-done figure on stderr.
- */
-
-#ifdef PROGRESS_REPORT
-
-METHODDEF(void)
-progress_monitor (j_common_ptr cinfo)
-{
- cd_progress_ptr prog = (cd_progress_ptr) cinfo->progress;
- int total_passes = prog->pub.total_passes + prog->total_extra_passes;
- int percent_done = (int) (prog->pub.pass_counter*100L/prog->pub.pass_limit);
-
- if (percent_done != prog->percent_done) {
- prog->percent_done = percent_done;
- if (total_passes > 1) {
- fprintf(stderr, "\rPass %d/%d: %3d%% ",
- prog->pub.completed_passes + prog->completed_extra_passes + 1,
- total_passes, percent_done);
- } else {
- fprintf(stderr, "\r %3d%% ", percent_done);
- }
- fflush(stderr);
- }
-}
-
-
-GLOBAL(void)
-start_progress_monitor (j_common_ptr cinfo, cd_progress_ptr progress)
-{
- /* Enable progress display, unless trace output is on */
- if (cinfo->err->trace_level == 0) {
- progress->pub.progress_monitor = progress_monitor;
- progress->completed_extra_passes = 0;
- progress->total_extra_passes = 0;
- progress->percent_done = -1;
- cinfo->progress = &progress->pub;
- }
-}
-
-
-GLOBAL(void)
-end_progress_monitor (j_common_ptr cinfo)
-{
- /* Clear away progress display */
- if (cinfo->err->trace_level == 0) {
- fprintf(stderr, "\r \r");
- fflush(stderr);
- }
-}
-
-#endif
-
-
-/*
- * Case-insensitive matching of possibly-abbreviated keyword switches.
- * keyword is the constant keyword (must be lower case already),
- * minchars is length of minimum legal abbreviation.
- */
-
-GLOBAL(boolean)
-keymatch (char * arg, const char * keyword, int minchars)
-{
- register int ca, ck;
- register int nmatched = 0;
-
- while ((ca = *arg++) != '\0') {
- if ((ck = *keyword++) == '\0')
- return FALSE; /* arg longer than keyword, no good */
- if (isupper(ca)) /* force arg to lcase (assume ck is already) */
- ca = tolower(ca);
- if (ca != ck)
- return FALSE; /* no good */
- nmatched++; /* count matched characters */
- }
- /* reached end of argument; fail if it's too short for unique abbrev */
- if (nmatched < minchars)
- return FALSE;
- return TRUE; /* A-OK */
-}
-
-
-/*
- * Routines to establish binary I/O mode for stdin and stdout.
- * Non-Unix systems often require some hacking to get out of text mode.
- */
-
-GLOBAL(FILE *)
-read_stdin (void)
-{
- FILE * input_file = stdin;
-
-#ifdef USE_SETMODE /* need to hack file mode? */
- setmode(fileno(stdin), O_BINARY);
-#endif
-#ifdef USE_FDOPEN /* need to re-open in binary mode? */
- if ((input_file = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
- fprintf(stderr, "Cannot reopen stdin\n");
- exit(EXIT_FAILURE);
- }
-#endif
- return input_file;
-}
-
-
-GLOBAL(FILE *)
-write_stdout (void)
-{
- FILE * output_file = stdout;
-
-#ifdef USE_SETMODE /* need to hack file mode? */
- setmode(fileno(stdout), O_BINARY);
-#endif
-#ifdef USE_FDOPEN /* need to re-open in binary mode? */
- if ((output_file = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) {
- fprintf(stderr, "Cannot reopen stdout\n");
- exit(EXIT_FAILURE);
- }
-#endif
- return output_file;
-}
+++ /dev/null
-/*
- * cdjpeg.h
- *
- * Copyright (C) 1994-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains common declarations for the sample applications
- * cjpeg and djpeg. It is NOT used by the core JPEG library.
- */
-
-#define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */
-#define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jerror.h" /* get library error codes too */
-#include "cderror.h" /* get application-specific error codes */
-
-
-/*
- * Object interface for cjpeg's source file decoding modules
- */
-
-typedef struct cjpeg_source_struct * cjpeg_source_ptr;
-
-struct cjpeg_source_struct {
- JMETHOD(void, start_input, (j_compress_ptr cinfo,
- cjpeg_source_ptr sinfo));
- JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo,
- cjpeg_source_ptr sinfo));
- JMETHOD(void, finish_input, (j_compress_ptr cinfo,
- cjpeg_source_ptr sinfo));
-
- FILE *input_file;
-
- JSAMPARRAY buffer;
- JDIMENSION buffer_height;
-};
-
-
-/*
- * Object interface for djpeg's output file encoding modules
- */
-
-typedef struct djpeg_dest_struct * djpeg_dest_ptr;
-
-struct djpeg_dest_struct {
- /* start_output is called after jpeg_start_decompress finishes.
- * The color map will be ready at this time, if one is needed.
- */
- JMETHOD(void, start_output, (j_decompress_ptr cinfo,
- djpeg_dest_ptr dinfo));
- /* Emit the specified number of pixel rows from the buffer. */
- JMETHOD(void, put_pixel_rows, (j_decompress_ptr cinfo,
- djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied));
- /* Finish up at the end of the image. */
- JMETHOD(void, finish_output, (j_decompress_ptr cinfo,
- djpeg_dest_ptr dinfo));
-
- /* Target file spec; filled in by djpeg.c after object is created. */
- FILE * output_file;
-
- /* Output pixel-row buffer. Created by module init or start_output.
- * Width is cinfo->output_width * cinfo->output_components;
- * height is buffer_height.
- */
- JSAMPARRAY buffer;
- JDIMENSION buffer_height;
-};
-
-
-/*
- * cjpeg/djpeg may need to perform extra passes to convert to or from
- * the source/destination file format. The JPEG library does not know
- * about these passes, but we'd like them to be counted by the progress
- * monitor. We use an expanded progress monitor object to hold the
- * additional pass count.
- */
-
-struct cdjpeg_progress_mgr {
- struct jpeg_progress_mgr pub; /* fields known to JPEG library */
- int completed_extra_passes; /* extra passes completed */
- int total_extra_passes; /* total extra */
- /* last printed percentage stored here to avoid multiple printouts */
- int percent_done;
-};
-
-typedef struct cdjpeg_progress_mgr * cd_progress_ptr;
-
-
-/* Short forms of external names for systems with brain-damaged linkers. */
-
-#ifdef NEED_SHORT_EXTERNAL_NAMES
-#define jinit_read_bmp jIRdBMP
-#define jinit_write_bmp jIWrBMP
-#define jinit_read_gif jIRdGIF
-#define jinit_write_gif jIWrGIF
-#define jinit_read_ppm jIRdPPM
-#define jinit_write_ppm jIWrPPM
-#define jinit_read_rle jIRdRLE
-#define jinit_write_rle jIWrRLE
-#define jinit_read_targa jIRdTarga
-#define jinit_write_targa jIWrTarga
-#define read_quant_tables RdQTables
-#define read_scan_script RdScnScript
-#define set_quant_slots SetQSlots
-#define set_sample_factors SetSFacts
-#define read_color_map RdCMap
-#define enable_signal_catcher EnSigCatcher
-#define start_progress_monitor StProgMon
-#define end_progress_monitor EnProgMon
-#define read_stdin RdStdin
-#define write_stdout WrStdout
-#endif /* NEED_SHORT_EXTERNAL_NAMES */
-
-/* Module selection routines for I/O modules. */
-
-EXTERN(cjpeg_source_ptr) jinit_read_bmp JPP((j_compress_ptr cinfo));
-EXTERN(djpeg_dest_ptr) jinit_write_bmp JPP((j_decompress_ptr cinfo,
- boolean is_os2));
-EXTERN(cjpeg_source_ptr) jinit_read_gif JPP((j_compress_ptr cinfo));
-EXTERN(djpeg_dest_ptr) jinit_write_gif JPP((j_decompress_ptr cinfo));
-EXTERN(cjpeg_source_ptr) jinit_read_ppm JPP((j_compress_ptr cinfo));
-EXTERN(djpeg_dest_ptr) jinit_write_ppm JPP((j_decompress_ptr cinfo));
-EXTERN(cjpeg_source_ptr) jinit_read_rle JPP((j_compress_ptr cinfo));
-EXTERN(djpeg_dest_ptr) jinit_write_rle JPP((j_decompress_ptr cinfo));
-EXTERN(cjpeg_source_ptr) jinit_read_targa JPP((j_compress_ptr cinfo));
-EXTERN(djpeg_dest_ptr) jinit_write_targa JPP((j_decompress_ptr cinfo));
-
-/* cjpeg support routines (in rdswitch.c) */
-
-EXTERN(boolean) read_quant_tables JPP((j_compress_ptr cinfo, char * filename,
- int scale_factor, boolean force_baseline));
-EXTERN(boolean) read_scan_script JPP((j_compress_ptr cinfo, char * filename));
-EXTERN(boolean) set_quant_slots JPP((j_compress_ptr cinfo, char *arg));
-EXTERN(boolean) set_sample_factors JPP((j_compress_ptr cinfo, char *arg));
-
-/* djpeg support routines (in rdcolmap.c) */
-
-EXTERN(void) read_color_map JPP((j_decompress_ptr cinfo, FILE * infile));
-
-/* common support routines (in cdjpeg.c) */
-
-EXTERN(void) enable_signal_catcher JPP((j_common_ptr cinfo));
-EXTERN(void) start_progress_monitor JPP((j_common_ptr cinfo,
- cd_progress_ptr progress));
-EXTERN(void) end_progress_monitor JPP((j_common_ptr cinfo));
-EXTERN(boolean) keymatch JPP((char * arg, const char * keyword, int minchars));
-EXTERN(FILE *) read_stdin JPP((void));
-EXTERN(FILE *) write_stdout JPP((void));
-
-/* miscellaneous useful macros */
-
-#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
-#define READ_BINARY "r"
-#define WRITE_BINARY "w"
-#else
-#ifdef VMS /* VMS is very nonstandard */
-#define READ_BINARY "rb", "ctx=stm"
-#define WRITE_BINARY "wb", "ctx=stm"
-#else /* standard ANSI-compliant case */
-#define READ_BINARY "rb"
-#define WRITE_BINARY "wb"
-#endif
-#endif
-
-#ifndef EXIT_FAILURE /* define exit() codes if not provided */
-#define EXIT_FAILURE 1
-#endif
-#ifndef EXIT_SUCCESS
-#ifdef VMS
-#define EXIT_SUCCESS 1 /* VMS is very nonstandard */
-#else
-#define EXIT_SUCCESS 0
-#endif
-#endif
-#ifndef EXIT_WARNING
-#ifdef VMS
-#define EXIT_WARNING 1 /* VMS is very nonstandard */
-#else
-#define EXIT_WARNING 2
-#endif
-#endif
+++ /dev/null
-CHANGE LOG for Independent JPEG Group's JPEG software
-
-
-Version 6b 27-Mar-1998
------------------------
-
-jpegtran has new features for lossless image transformations (rotation
-and flipping) as well as "lossless" reduction to grayscale.
-
-jpegtran now copies comments by default; it has a -copy switch to enable
-copying all APPn blocks as well, or to suppress comments. (Formerly it
-always suppressed comments and APPn blocks.) jpegtran now also preserves
-JFIF version and resolution information.
-
-New decompressor library feature: COM and APPn markers found in the input
-file can be saved in memory for later use by the application. (Before,
-you had to code this up yourself with a custom marker processor.)
-
-There is an unused field "void * client_data" now in compress and decompress
-parameter structs; this may be useful in some applications.
-
-JFIF version number information is now saved by the decoder and accepted by
-the encoder. jpegtran uses this to copy the source file's version number,
-to ensure "jpegtran -copy all" won't create bogus files that contain JFXX
-extensions but claim to be version 1.01. Applications that generate their
-own JFXX extension markers also (finally) have a supported way to cause the
-encoder to emit JFIF version number 1.02.
-
-djpeg's trace mode reports JFIF 1.02 thumbnail images as such, rather
-than as unknown APP0 markers.
-
-In -verbose mode, djpeg and rdjpgcom will try to print the contents of
-APP12 markers as text. Some digital cameras store useful text information
-in APP12 markers.
-
-Handling of truncated data streams is more robust: blocks beyond the one in
-which the error occurs will be output as uniform gray, or left unchanged
-if decoding a progressive JPEG. The appearance no longer depends on the
-Huffman tables being used.
-
-Huffman tables are checked for validity much more carefully than before.
-
-To avoid the Unisys LZW patent, djpeg's GIF output capability has been
-changed to produce "uncompressed GIFs", and cjpeg's GIF input capability
-has been removed altogether. We're not happy about it either, but there
-seems to be no good alternative.
-
-The configure script now supports building libjpeg as a shared library
-on many flavors of Unix (all the ones that GNU libtool knows how to
-build shared libraries for). Use "./configure --enable-shared" to
-try this out.
-
-New jconfig file and makefiles for Microsoft Visual C++ and Developer Studio.
-Also, a jconfig file and a build script for Metrowerks CodeWarrior
-on Apple Macintosh. makefile.dj has been updated for DJGPP v2, and there
-are miscellaneous other minor improvements in the makefiles.
-
-jmemmac.c now knows how to create temporary files following Mac System 7
-conventions.
-
-djpeg's -map switch is now able to read raw-format PPM files reliably.
-
-cjpeg -progressive -restart no longer generates any unnecessary DRI markers.
-
-Multiple calls to jpeg_simple_progression for a single JPEG object
-no longer leak memory.
-
-
-Version 6a 7-Feb-96
---------------------
-
-Library initialization sequence modified to detect version mismatches
-and struct field packing mismatches between library and calling application.
-This change requires applications to be recompiled, but does not require
-any application source code change.
-
-All routine declarations changed to the style "GLOBAL(type) name ...",
-that is, GLOBAL, LOCAL, METHODDEF, EXTERN are now macros taking the
-routine's return type as an argument. This makes it possible to add
-Microsoft-style linkage keywords to all the routines by changing just
-these macros. Note that any application code that was using these macros
-will have to be changed.
-
-DCT coefficient quantization tables are now stored in normal array order
-rather than zigzag order. Application code that calls jpeg_add_quant_table,
-or otherwise manipulates quantization tables directly, will need to be
-changed. If you need to make such code work with either older or newer
-versions of the library, a test like "#if JPEG_LIB_VERSION >= 61" is
-recommended.
-
-djpeg's trace capability now dumps DQT tables in natural order, not zigzag
-order. This allows the trace output to be made into a "-qtables" file
-more easily.
-
-New system-dependent memory manager module for use on Apple Macintosh.
-
-Fix bug in cjpeg's -smooth option: last one or two scanlines would be
-duplicates of the prior line unless the image height mod 16 was 1 or 2.
-
-Repair minor problems in VMS, BCC, MC6 makefiles.
-
-New configure script based on latest GNU Autoconf.
-
-Correct the list of include files needed by MetroWerks C for ccommand().
-
-Numerous small documentation updates.
-
-
-Version 6 2-Aug-95
--------------------
-
-Progressive JPEG support: library can read and write full progressive JPEG
-files. A "buffered image" mode supports incremental decoding for on-the-fly
-display of progressive images. Simply recompiling an existing IJG-v5-based
-decoder with v6 should allow it to read progressive files, though of course
-without any special progressive display.
-
-New "jpegtran" application performs lossless transcoding between different
-JPEG formats; primarily, it can be used to convert baseline to progressive
-JPEG and vice versa. In support of jpegtran, the library now allows lossless
-reading and writing of JPEG files as DCT coefficient arrays. This ability
-may be of use in other applications.
-
-Notes for programmers:
-* We changed jpeg_start_decompress() to be able to suspend; this makes all
-decoding modes available to suspending-input applications. However,
-existing applications that use suspending input will need to be changed
-to check the return value from jpeg_start_decompress(). You don't need to
-do anything if you don't use a suspending data source.
-* We changed the interface to the virtual array routines: access_virt_array
-routines now take a count of the number of rows to access this time. The
-last parameter to request_virt_array routines is now interpreted as the
-maximum number of rows that may be accessed at once, but not necessarily
-the height of every access.
-
-
-Version 5b 15-Mar-95
----------------------
-
-Correct bugs with grayscale images having v_samp_factor > 1.
-
-jpeg_write_raw_data() now supports output suspension.
-
-Correct bugs in "configure" script for case of compiling in
-a directory other than the one containing the source files.
-
-Repair bug in jquant1.c: sometimes didn't use as many colors as it could.
-
-Borland C makefile and jconfig file work under either MS-DOS or OS/2.
-
-Miscellaneous improvements to documentation.
-
-
-Version 5a 7-Dec-94
---------------------
-
-Changed color conversion roundoff behavior so that grayscale values are
-represented exactly. (This causes test image files to change.)
-
-Make ordered dither use 16x16 instead of 4x4 pattern for a small quality
-improvement.
-
-New configure script based on latest GNU Autoconf.
-Fix configure script to handle CFLAGS correctly.
-Rename *.auto files to *.cfg, so that configure script still works if
-file names have been truncated for DOS.
-
-Fix bug in rdbmp.c: didn't allow for extra data between header and image.
-
-Modify rdppm.c/wrppm.c to handle 2-byte raw PPM/PGM formats for 12-bit data.
-
-Fix several bugs in rdrle.c.
-
-NEED_SHORT_EXTERNAL_NAMES option was broken.
-
-Revise jerror.h/jerror.c for more flexibility in message table.
-
-Repair oversight in jmemname.c NO_MKTEMP case: file could be there
-but unreadable.
-
-
-Version 5 24-Sep-94
---------------------
-
-Version 5 represents a nearly complete redesign and rewrite of the IJG
-software. Major user-visible changes include:
- * Automatic configuration simplifies installation for most Unix systems.
- * A range of speed vs. image quality tradeoffs are supported.
- This includes resizing of an image during decompression: scaling down
- by a factor of 1/2, 1/4, or 1/8 is handled very efficiently.
- * New programs rdjpgcom and wrjpgcom allow insertion and extraction
- of text comments in a JPEG file.
-
-The application programmer's interface to the library has changed completely.
-Notable improvements include:
- * We have eliminated the use of callback routines for handling the
- uncompressed image data. The application now sees the library as a
- set of routines that it calls to read or write image data on a
- scanline-by-scanline basis.
- * The application image data is represented in a conventional interleaved-
- pixel format, rather than as a separate array for each color channel.
- This can save a copying step in many programs.
- * The handling of compressed data has been cleaned up: the application can
- supply routines to source or sink the compressed data. It is possible to
- suspend processing on source/sink buffer overrun, although this is not
- supported in all operating modes.
- * All static state has been eliminated from the library, so that multiple
- instances of compression or decompression can be active concurrently.
- * JPEG abbreviated datastream formats are supported, ie, quantization and
- Huffman tables can be stored separately from the image data.
- * And not only that, but the documentation of the library has improved
- considerably!
-
-
-The last widely used release before the version 5 rewrite was version 4A of
-18-Feb-93. Change logs before that point have been discarded, since they
-are not of much interest after the rewrite.
+++ /dev/null
-.TH CJPEG 1 "20 March 1998"
-.SH NAME
-cjpeg \- compress an image file to a JPEG file
-.SH SYNOPSIS
-.B cjpeg
-[
-.I options
-]
-[
-.I filename
-]
-.LP
-.SH DESCRIPTION
-.LP
-.B cjpeg
-compresses the named image file, or the standard input if no file is
-named, and produces a JPEG/JFIF file on the standard output.
-The currently supported input file formats are: PPM (PBMPLUS color
-format), PGM (PBMPLUS gray-scale format), BMP, Targa, and RLE (Utah Raster
-Toolkit format). (RLE is supported only if the URT library is available.)
-.SH OPTIONS
-All switch names may be abbreviated; for example,
-.B \-grayscale
-may be written
-.B \-gray
-or
-.BR \-gr .
-Most of the "basic" switches can be abbreviated to as little as one letter.
-Upper and lower case are equivalent (thus
-.B \-BMP
-is the same as
-.BR \-bmp ).
-British spellings are also accepted (e.g.,
-.BR \-greyscale ),
-though for brevity these are not mentioned below.
-.PP
-The basic switches are:
-.TP
-.BI \-quality " N"
-Scale quantization tables to adjust image quality. Quality is 0 (worst) to
-100 (best); default is 75. (See below for more info.)
-.TP
-.B \-grayscale
-Create monochrome JPEG file from color input. Be sure to use this switch when
-compressing a grayscale BMP file, because
-.B cjpeg
-isn't bright enough to notice whether a BMP file uses only shades of gray.
-By saying
-.BR \-grayscale ,
-you'll get a smaller JPEG file that takes less time to process.
-.TP
-.B \-optimize
-Perform optimization of entropy encoding parameters. Without this, default
-encoding parameters are used.
-.B \-optimize
-usually makes the JPEG file a little smaller, but
-.B cjpeg
-runs somewhat slower and needs much more memory. Image quality and speed of
-decompression are unaffected by
-.BR \-optimize .
-.TP
-.B \-progressive
-Create progressive JPEG file (see below).
-.TP
-.B \-targa
-Input file is Targa format. Targa files that contain an "identification"
-field will not be automatically recognized by
-.BR cjpeg ;
-for such files you must specify
-.B \-targa
-to make
-.B cjpeg
-treat the input as Targa format.
-For most Targa files, you won't need this switch.
-.PP
-The
-.B \-quality
-switch lets you trade off compressed file size against quality of the
-reconstructed image: the higher the quality setting, the larger the JPEG file,
-and the closer the output image will be to the original input. Normally you
-want to use the lowest quality setting (smallest file) that decompresses into
-something visually indistinguishable from the original image. For this
-purpose the quality setting should be between 50 and 95; the default of 75 is
-often about right. If you see defects at
-.B \-quality
-75, then go up 5 or 10 counts at a time until you are happy with the output
-image. (The optimal setting will vary from one image to another.)
-.PP
-.B \-quality
-100 will generate a quantization table of all 1's, minimizing loss in the
-quantization step (but there is still information loss in subsampling, as well
-as roundoff error). This setting is mainly of interest for experimental
-purposes. Quality values above about 95 are
-.B not
-recommended for normal use; the compressed file size goes up dramatically for
-hardly any gain in output image quality.
-.PP
-In the other direction, quality values below 50 will produce very small files
-of low image quality. Settings around 5 to 10 might be useful in preparing an
-index of a large image library, for example. Try
-.B \-quality
-2 (or so) for some amusing Cubist effects. (Note: quality
-values below about 25 generate 2-byte quantization tables, which are
-considered optional in the JPEG standard.
-.B cjpeg
-emits a warning message when you give such a quality value, because some
-other JPEG programs may be unable to decode the resulting file. Use
-.B \-baseline
-if you need to ensure compatibility at low quality values.)
-.PP
-The
-.B \-progressive
-switch creates a "progressive JPEG" file. In this type of JPEG file, the data
-is stored in multiple scans of increasing quality. If the file is being
-transmitted over a slow communications link, the decoder can use the first
-scan to display a low-quality image very quickly, and can then improve the
-display with each subsequent scan. The final image is exactly equivalent to a
-standard JPEG file of the same quality setting, and the total file size is
-about the same --- often a little smaller.
-.B Caution:
-progressive JPEG is not yet widely implemented, so many decoders will be
-unable to view a progressive JPEG file at all.
-.PP
-Switches for advanced users:
-.TP
-.B \-dct int
-Use integer DCT method (default).
-.TP
-.B \-dct fast
-Use fast integer DCT (less accurate).
-.TP
-.B \-dct float
-Use floating-point DCT method.
-The float method is very slightly more accurate than the int method, but is
-much slower unless your machine has very fast floating-point hardware. Also
-note that results of the floating-point method may vary slightly across
-machines, while the integer methods should give the same results everywhere.
-The fast integer method is much less accurate than the other two.
-.TP
-.BI \-restart " N"
-Emit a JPEG restart marker every N MCU rows, or every N MCU blocks if "B" is
-attached to the number.
-.B \-restart 0
-(the default) means no restart markers.
-.TP
-.BI \-smooth " N"
-Smooth the input image to eliminate dithering noise. N, ranging from 1 to
-100, indicates the strength of smoothing. 0 (the default) means no smoothing.
-.TP
-.BI \-maxmemory " N"
-Set limit for amount of memory to use in processing large images. Value is
-in thousands of bytes, or millions of bytes if "M" is attached to the
-number. For example,
-.B \-max 4m
-selects 4000000 bytes. If more space is needed, temporary files will be used.
-.TP
-.BI \-outfile " name"
-Send output image to the named file, not to standard output.
-.TP
-.B \-verbose
-Enable debug printout. More
-.BR \-v 's
-give more output. Also, version information is printed at startup.
-.TP
-.B \-debug
-Same as
-.BR \-verbose .
-.PP
-The
-.B \-restart
-option inserts extra markers that allow a JPEG decoder to resynchronize after
-a transmission error. Without restart markers, any damage to a compressed
-file will usually ruin the image from the point of the error to the end of the
-image; with restart markers, the damage is usually confined to the portion of
-the image up to the next restart marker. Of course, the restart markers
-occupy extra space. We recommend
-.B \-restart 1
-for images that will be transmitted across unreliable networks such as Usenet.
-.PP
-The
-.B \-smooth
-option filters the input to eliminate fine-scale noise. This is often useful
-when converting dithered images to JPEG: a moderate smoothing factor of 10 to
-50 gets rid of dithering patterns in the input file, resulting in a smaller
-JPEG file and a better-looking image. Too large a smoothing factor will
-visibly blur the image, however.
-.PP
-Switches for wizards:
-.TP
-.B \-baseline
-Force baseline-compatible quantization tables to be generated. This clamps
-quantization values to 8 bits even at low quality settings. (This switch is
-poorly named, since it does not ensure that the output is actually baseline
-JPEG. For example, you can use
-.B \-baseline
-and
-.B \-progressive
-together.)
-.TP
-.BI \-qtables " file"
-Use the quantization tables given in the specified text file.
-.TP
-.BI \-qslots " N[,...]"
-Select which quantization table to use for each color component.
-.TP
-.BI \-sample " HxV[,...]"
-Set JPEG sampling factors for each color component.
-.TP
-.BI \-scans " file"
-Use the scan script given in the specified text file.
-.PP
-The "wizard" switches are intended for experimentation with JPEG. If you
-don't know what you are doing, \fBdon't use them\fR. These switches are
-documented further in the file wizard.doc.
-.SH EXAMPLES
-.LP
-This example compresses the PPM file foo.ppm with a quality factor of
-60 and saves the output as foo.jpg:
-.IP
-.B cjpeg \-quality
-.I 60 foo.ppm
-.B >
-.I foo.jpg
-.SH HINTS
-Color GIF files are not the ideal input for JPEG; JPEG is really intended for
-compressing full-color (24-bit) images. In particular, don't try to convert
-cartoons, line drawings, and other images that have only a few distinct
-colors. GIF works great on these, JPEG does not. If you want to convert a
-GIF to JPEG, you should experiment with
-.BR cjpeg 's
-.B \-quality
-and
-.B \-smooth
-options to get a satisfactory conversion.
-.B \-smooth 10
-or so is often helpful.
-.PP
-Avoid running an image through a series of JPEG compression/decompression
-cycles. Image quality loss will accumulate; after ten or so cycles the image
-may be noticeably worse than it was after one cycle. It's best to use a
-lossless format while manipulating an image, then convert to JPEG format when
-you are ready to file the image away.
-.PP
-The
-.B \-optimize
-option to
-.B cjpeg
-is worth using when you are making a "final" version for posting or archiving.
-It's also a win when you are using low quality settings to make very small
-JPEG files; the percentage improvement is often a lot more than it is on
-larger files. (At present,
-.B \-optimize
-mode is always selected when generating progressive JPEG files.)
-.SH ENVIRONMENT
-.TP
-.B JPEGMEM
-If this environment variable is set, its value is the default memory limit.
-The value is specified as described for the
-.B \-maxmemory
-switch.
-.B JPEGMEM
-overrides the default value specified when the program was compiled, and
-itself is overridden by an explicit
-.BR \-maxmemory .
-.SH SEE ALSO
-.BR djpeg (1),
-.BR jpegtran (1),
-.BR rdjpgcom (1),
-.BR wrjpgcom (1)
-.br
-.BR ppm (5),
-.BR pgm (5)
-.br
-Wallace, Gregory K. "The JPEG Still Picture Compression Standard",
-Communications of the ACM, April 1991 (vol. 34, no. 4), pp. 30-44.
-.SH AUTHOR
-Independent JPEG Group
-.SH BUGS
-Arithmetic coding is not supported for legal reasons.
-.PP
-GIF input files are no longer supported, to avoid the Unisys LZW patent.
-Use a Unisys-licensed program if you need to read a GIF file. (Conversion
-of GIF files to JPEG is usually a bad idea anyway.)
-.PP
-Not all variants of BMP and Targa file formats are supported.
-.PP
-The
-.B \-targa
-switch is not a bug, it's a feature. (It would be a bug if the Targa format
-designers had not been clueless.)
-.PP
-Still not as fast as we'd like.
+++ /dev/null
-/*
- * cjpeg.c
- *
- * Copyright (C) 1991-1998, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains a command-line user interface for the JPEG compressor.
- * It should work on any system with Unix- or MS-DOS-style command lines.
- *
- * Two different command line styles are permitted, depending on the
- * compile-time switch TWO_FILE_COMMANDLINE:
- * cjpeg [options] inputfile outputfile
- * cjpeg [options] [inputfile]
- * In the second style, output is always to standard output, which you'd
- * normally redirect to a file or pipe to some other program. Input is
- * either from a named file or from standard input (typically redirected).
- * The second style is convenient on Unix but is unhelpful on systems that
- * don't support pipes. Also, you MUST use the first style if your system
- * doesn't do binary I/O to stdin/stdout.
- * To simplify script writing, the "-outfile" switch is provided. The syntax
- * cjpeg [options] -outfile outputfile inputfile
- * works regardless of which command line style is used.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-#include "jversion.h" /* for version message */
-
-#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
-#ifdef __MWERKS__
-#include <SIOUX.h> /* Metrowerks needs this */
-#include <console.h> /* ... and this */
-#endif
-#ifdef THINK_C
-#include <console.h> /* Think declares it here */
-#endif
-#endif
-
-
-/* Create the add-on message string table. */
-
-#define JMESSAGE(code,string) string ,
-
-static const char * const cdjpeg_message_table[] = {
-#include "cderror.h"
- NULL
-};
-
-
-/*
- * This routine determines what format the input file is,
- * and selects the appropriate input-reading module.
- *
- * To determine which family of input formats the file belongs to,
- * we may look only at the first byte of the file, since C does not
- * guarantee that more than one character can be pushed back with ungetc.
- * Looking at additional bytes would require one of these approaches:
- * 1) assume we can fseek() the input file (fails for piped input);
- * 2) assume we can push back more than one character (works in
- * some C implementations, but unportable);
- * 3) provide our own buffering (breaks input readers that want to use
- * stdio directly, such as the RLE library);
- * or 4) don't put back the data, and modify the input_init methods to assume
- * they start reading after the start of file (also breaks RLE library).
- * #1 is attractive for MS-DOS but is untenable on Unix.
- *
- * The most portable solution for file types that can't be identified by their
- * first byte is to make the user tell us what they are. This is also the
- * only approach for "raw" file types that contain only arbitrary values.
- * We presently apply this method for Targa files. Most of the time Targa
- * files start with 0x00, so we recognize that case. Potentially, however,
- * a Targa file could start with any byte value (byte 0 is the length of the
- * seldom-used ID field), so we provide a switch to force Targa input mode.
- */
-
-static boolean is_targa; /* records user -targa switch */
-
-
-LOCAL(cjpeg_source_ptr)
-select_file_type (j_compress_ptr cinfo, FILE * infile)
-{
- int c;
-
- if (is_targa) {
-#ifdef TARGA_SUPPORTED
- return jinit_read_targa(cinfo);
-#else
- ERREXIT(cinfo, JERR_TGA_NOTCOMP);
-#endif
- }
-
- if ((c = getc(infile)) == EOF)
- ERREXIT(cinfo, JERR_INPUT_EMPTY);
- if (ungetc(c, infile) == EOF)
- ERREXIT(cinfo, JERR_UNGETC_FAILED);
-
- switch (c) {
-#ifdef BMP_SUPPORTED
- case 'B':
- return jinit_read_bmp(cinfo);
-#endif
-#ifdef GIF_SUPPORTED
- case 'G':
- return jinit_read_gif(cinfo);
-#endif
-#ifdef PPM_SUPPORTED
- case 'P':
- return jinit_read_ppm(cinfo);
-#endif
-#ifdef RLE_SUPPORTED
- case 'R':
- return jinit_read_rle(cinfo);
-#endif
-#ifdef TARGA_SUPPORTED
- case 0x00:
- return jinit_read_targa(cinfo);
-#endif
- default:
- ERREXIT(cinfo, JERR_UNKNOWN_FORMAT);
- break;
- }
-
- return NULL; /* suppress compiler warnings */
-}
-
-
-/*
- * Argument-parsing code.
- * The switch parser is designed to be useful with DOS-style command line
- * syntax, ie, intermixed switches and file names, where only the switches
- * to the left of a given file name affect processing of that file.
- * The main program in this file doesn't actually use this capability...
- */
-
-
-static const char * progname; /* program name for error messages */
-static char * outfilename; /* for -outfile switch */
-
-
-LOCAL(void)
-usage (void)
-/* complain about bad command line */
-{
- fprintf(stderr, "usage: %s [switches] ", progname);
-#ifdef TWO_FILE_COMMANDLINE
- fprintf(stderr, "inputfile outputfile\n");
-#else
- fprintf(stderr, "[inputfile]\n");
-#endif
-
- fprintf(stderr, "Switches (names may be abbreviated):\n");
- fprintf(stderr, " -quality N Compression quality (0..100; 5-95 is useful range)\n");
- fprintf(stderr, " -grayscale Create monochrome JPEG file\n");
-#ifdef ENTROPY_OPT_SUPPORTED
- fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
-#endif
-#ifdef C_PROGRESSIVE_SUPPORTED
- fprintf(stderr, " -progressive Create progressive JPEG file\n");
-#endif
-#ifdef TARGA_SUPPORTED
- fprintf(stderr, " -targa Input file is Targa format (usually not needed)\n");
-#endif
- fprintf(stderr, "Switches for advanced users:\n");
-#ifdef DCT_ISLOW_SUPPORTED
- fprintf(stderr, " -dct int Use integer DCT method%s\n",
- (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
-#endif
-#ifdef DCT_IFAST_SUPPORTED
- fprintf(stderr, " -dct fast Use fast integer DCT (less accurate)%s\n",
- (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
-#endif
-#ifdef DCT_FLOAT_SUPPORTED
- fprintf(stderr, " -dct float Use floating-point DCT method%s\n",
- (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
-#endif
- fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
-#ifdef INPUT_SMOOTHING_SUPPORTED
- fprintf(stderr, " -smooth N Smooth dithered input (N=1..100 is strength)\n");
-#endif
- fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
- fprintf(stderr, " -outfile name Specify name for output file\n");
- fprintf(stderr, " -verbose or -debug Emit debug output\n");
- fprintf(stderr, "Switches for wizards:\n");
-#ifdef C_ARITH_CODING_SUPPORTED
- fprintf(stderr, " -arithmetic Use arithmetic coding\n");
-#endif
- fprintf(stderr, " -baseline Force baseline quantization tables\n");
- fprintf(stderr, " -qtables file Use quantization tables given in file\n");
- fprintf(stderr, " -qslots N[,...] Set component quantization tables\n");
- fprintf(stderr, " -sample HxV[,...] Set component sampling factors\n");
-#ifdef C_MULTISCAN_FILES_SUPPORTED
- fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
-#endif
- exit(EXIT_FAILURE);
-}
-
-
-LOCAL(int)
-parse_switches (j_compress_ptr cinfo, int argc, char **argv,
- int last_file_arg_seen, boolean for_real)
-/* Parse optional switches.
- * Returns argv[] index of first file-name argument (== argc if none).
- * Any file names with indexes <= last_file_arg_seen are ignored;
- * they have presumably been processed in a previous iteration.
- * (Pass 0 for last_file_arg_seen on the first or only iteration.)
- * for_real is FALSE on the first (dummy) pass; we may skip any expensive
- * processing.
- */
-{
- int argn;
- char * arg;
- int quality; /* -quality parameter */
- int q_scale_factor; /* scaling percentage for -qtables */
- boolean force_baseline;
- boolean simple_progressive;
- char * qtablefile = NULL; /* saves -qtables filename if any */
- char * qslotsarg = NULL; /* saves -qslots parm if any */
- char * samplearg = NULL; /* saves -sample parm if any */
- char * scansarg = NULL; /* saves -scans parm if any */
-
- /* Set up default JPEG parameters. */
- /* Note that default -quality level need not, and does not,
- * match the default scaling for an explicit -qtables argument.
- */
- quality = 75; /* default -quality value */
- q_scale_factor = 100; /* default to no scaling for -qtables */
- force_baseline = FALSE; /* by default, allow 16-bit quantizers */
- simple_progressive = FALSE;
- is_targa = FALSE;
- outfilename = NULL;
- cinfo->err->trace_level = 0;
-
- /* Scan command line options, adjust parameters */
-
- for (argn = 1; argn < argc; argn++) {
- arg = argv[argn];
- if (*arg != '-') {
- /* Not a switch, must be a file name argument */
- if (argn <= last_file_arg_seen) {
- outfilename = NULL; /* -outfile applies to just one input file */
- continue; /* ignore this name if previously processed */
- }
- break; /* else done parsing switches */
- }
- arg++; /* advance past switch marker character */
-
- if (keymatch(arg, "arithmetic", 1)) {
- /* Use arithmetic coding. */
-#ifdef C_ARITH_CODING_SUPPORTED
- cinfo->arith_code = TRUE;
-#else
- fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
- progname);
- exit(EXIT_FAILURE);
-#endif
-
- } else if (keymatch(arg, "baseline", 1)) {
- /* Force baseline-compatible output (8-bit quantizer values). */
- force_baseline = TRUE;
-
- } else if (keymatch(arg, "dct", 2)) {
- /* Select DCT algorithm. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (keymatch(argv[argn], "int", 1)) {
- cinfo->dct_method = JDCT_ISLOW;
- } else if (keymatch(argv[argn], "fast", 2)) {
- cinfo->dct_method = JDCT_IFAST;
- } else if (keymatch(argv[argn], "float", 2)) {
- cinfo->dct_method = JDCT_FLOAT;
- } else
- usage();
-
- } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
- /* Enable debug printouts. */
- /* On first -d, print version identification */
- static boolean printed_version = FALSE;
-
- if (! printed_version) {
- fprintf(stderr, "Independent JPEG Group's CJPEG, version %s\n%s\n",
- JVERSION, JCOPYRIGHT);
- printed_version = TRUE;
- }
- cinfo->err->trace_level++;
-
- } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
- /* Force a monochrome JPEG file to be generated. */
- jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
-
- } else if (keymatch(arg, "maxmemory", 3)) {
- /* Maximum memory in Kb (or Mb with 'm'). */
- long lval;
- char ch = 'x';
-
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
- usage();
- if (ch == 'm' || ch == 'M')
- lval *= 1000L;
- cinfo->mem->max_memory_to_use = lval * 1000L;
-
- } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
- /* Enable entropy parm optimization. */
-#ifdef ENTROPY_OPT_SUPPORTED
- cinfo->optimize_coding = TRUE;
-#else
- fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
- progname);
- exit(EXIT_FAILURE);
-#endif
-
- } else if (keymatch(arg, "outfile", 4)) {
- /* Set output file name. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- outfilename = argv[argn]; /* save it away for later use */
-
- } else if (keymatch(arg, "progressive", 1)) {
- /* Select simple progressive mode. */
-#ifdef C_PROGRESSIVE_SUPPORTED
- simple_progressive = TRUE;
- /* We must postpone execution until num_components is known. */
-#else
- fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
- progname);
- exit(EXIT_FAILURE);
-#endif
-
- } else if (keymatch(arg, "quality", 1)) {
- /* Quality factor (quantization table scaling factor). */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%d", &quality) != 1)
- usage();
- /* Change scale factor in case -qtables is present. */
- q_scale_factor = jpeg_quality_scaling(quality);
-
- } else if (keymatch(arg, "qslots", 2)) {
- /* Quantization table slot numbers. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- qslotsarg = argv[argn];
- /* Must delay setting qslots until after we have processed any
- * colorspace-determining switches, since jpeg_set_colorspace sets
- * default quant table numbers.
- */
-
- } else if (keymatch(arg, "qtables", 2)) {
- /* Quantization tables fetched from file. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- qtablefile = argv[argn];
- /* We postpone actually reading the file in case -quality comes later. */
-
- } else if (keymatch(arg, "restart", 1)) {
- /* Restart interval in MCU rows (or in MCUs with 'b'). */
- long lval;
- char ch = 'x';
-
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
- usage();
- if (lval < 0 || lval > 65535L)
- usage();
- if (ch == 'b' || ch == 'B') {
- cinfo->restart_interval = (unsigned int) lval;
- cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
- } else {
- cinfo->restart_in_rows = (int) lval;
- /* restart_interval will be computed during startup */
- }
-
- } else if (keymatch(arg, "sample", 2)) {
- /* Set sampling factors. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- samplearg = argv[argn];
- /* Must delay setting sample factors until after we have processed any
- * colorspace-determining switches, since jpeg_set_colorspace sets
- * default sampling factors.
- */
-
- } else if (keymatch(arg, "scans", 2)) {
- /* Set scan script. */
-#ifdef C_MULTISCAN_FILES_SUPPORTED
- if (++argn >= argc) /* advance to next argument */
- usage();
- scansarg = argv[argn];
- /* We must postpone reading the file in case -progressive appears. */
-#else
- fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
- progname);
- exit(EXIT_FAILURE);
-#endif
-
- } else if (keymatch(arg, "smooth", 2)) {
- /* Set input smoothing factor. */
- int val;
-
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%d", &val) != 1)
- usage();
- if (val < 0 || val > 100)
- usage();
- cinfo->smoothing_factor = val;
-
- } else if (keymatch(arg, "targa", 1)) {
- /* Input file is Targa format. */
- is_targa = TRUE;
-
- } else {
- usage(); /* bogus switch */
- }
- }
-
- /* Post-switch-scanning cleanup */
-
- if (for_real) {
-
- /* Set quantization tables for selected quality. */
- /* Some or all may be overridden if -qtables is present. */
- jpeg_set_quality(cinfo, quality, force_baseline);
-
- if (qtablefile != NULL) /* process -qtables if it was present */
- if (! read_quant_tables(cinfo, qtablefile,
- q_scale_factor, force_baseline))
- usage();
-
- if (qslotsarg != NULL) /* process -qslots if it was present */
- if (! set_quant_slots(cinfo, qslotsarg))
- usage();
-
- if (samplearg != NULL) /* process -sample if it was present */
- if (! set_sample_factors(cinfo, samplearg))
- usage();
-
-#ifdef C_PROGRESSIVE_SUPPORTED
- if (simple_progressive) /* process -progressive; -scans can override */
- jpeg_simple_progression(cinfo);
-#endif
-
-#ifdef C_MULTISCAN_FILES_SUPPORTED
- if (scansarg != NULL) /* process -scans if it was present */
- if (! read_scan_script(cinfo, scansarg))
- usage();
-#endif
- }
-
- return argn; /* return index of next arg (file name) */
-}
-
-
-/*
- * The main program.
- */
-
-int
-main (int argc, char **argv)
-{
- struct jpeg_compress_struct cinfo;
- struct jpeg_error_mgr jerr;
-#ifdef PROGRESS_REPORT
- struct cdjpeg_progress_mgr progress;
-#endif
- int file_index;
- cjpeg_source_ptr src_mgr;
- FILE * input_file;
- FILE * output_file;
- JDIMENSION num_scanlines;
-
- /* On Mac, fetch a command line. */
-#ifdef USE_CCOMMAND
- argc = ccommand(&argv);
-#endif
-
- progname = argv[0];
- if (progname == NULL || progname[0] == 0)
- progname = "cjpeg"; /* in case C library doesn't provide it */
-
- /* Initialize the JPEG compression object with default error handling. */
- cinfo.err = jpeg_std_error(&jerr);
- jpeg_create_compress(&cinfo);
- /* Add some application-specific error messages (from cderror.h) */
- jerr.addon_message_table = cdjpeg_message_table;
- jerr.first_addon_message = JMSG_FIRSTADDONCODE;
- jerr.last_addon_message = JMSG_LASTADDONCODE;
-
- /* Now safe to enable signal catcher. */
-#ifdef NEED_SIGNAL_CATCHER
- enable_signal_catcher((j_common_ptr) &cinfo);
-#endif
-
- /* Initialize JPEG parameters.
- * Much of this may be overridden later.
- * In particular, we don't yet know the input file's color space,
- * but we need to provide some value for jpeg_set_defaults() to work.
- */
-
- cinfo.in_color_space = JCS_RGB; /* arbitrary guess */
- jpeg_set_defaults(&cinfo);
-
- /* Scan command line to find file names.
- * It is convenient to use just one switch-parsing routine, but the switch
- * values read here are ignored; we will rescan the switches after opening
- * the input file.
- */
-
- file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
-
-#ifdef TWO_FILE_COMMANDLINE
- /* Must have either -outfile switch or explicit output file name */
- if (outfilename == NULL) {
- if (file_index != argc-2) {
- fprintf(stderr, "%s: must name one input and one output file\n",
- progname);
- usage();
- }
- outfilename = argv[file_index+1];
- } else {
- if (file_index != argc-1) {
- fprintf(stderr, "%s: must name one input and one output file\n",
- progname);
- usage();
- }
- }
-#else
- /* Unix style: expect zero or one file name */
- if (file_index < argc-1) {
- fprintf(stderr, "%s: only one input file\n", progname);
- usage();
- }
-#endif /* TWO_FILE_COMMANDLINE */
-
- /* Open the input file. */
- if (file_index < argc) {
- if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default input file is stdin */
- input_file = read_stdin();
- }
-
- /* Open the output file. */
- if (outfilename != NULL) {
- if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default output file is stdout */
- output_file = write_stdout();
- }
-
-#ifdef PROGRESS_REPORT
- start_progress_monitor((j_common_ptr) &cinfo, &progress);
-#endif
-
- /* Figure out the input file format, and set up to read it. */
- src_mgr = select_file_type(&cinfo, input_file);
- src_mgr->input_file = input_file;
-
- /* Read the input file header to obtain file size & colorspace. */
- (*src_mgr->start_input) (&cinfo, src_mgr);
-
- /* Now that we know input colorspace, fix colorspace-dependent defaults */
- jpeg_default_colorspace(&cinfo);
-
- /* Adjust default compression parameters by re-parsing the options */
- file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
-
- /* Specify data destination for compression */
- jpeg_stdio_dest(&cinfo, output_file);
-
- /* Start compressor */
- jpeg_start_compress(&cinfo, TRUE);
-
- /* Process data */
- while (cinfo.next_scanline < cinfo.image_height) {
- num_scanlines = (*src_mgr->get_pixel_rows) (&cinfo, src_mgr);
- (void) jpeg_write_scanlines(&cinfo, src_mgr->buffer, num_scanlines);
- }
-
- /* Finish compression and release memory */
- (*src_mgr->finish_input) (&cinfo, src_mgr);
- jpeg_finish_compress(&cinfo);
- jpeg_destroy_compress(&cinfo);
-
- /* Close files, if we opened them */
- if (input_file != stdin)
- fclose(input_file);
- if (output_file != stdout)
- fclose(output_file);
-
-#ifdef PROGRESS_REPORT
- end_progress_monitor((j_common_ptr) &cinfo);
-#endif
-
- /* All done. */
- exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
- return 0; /* suppress no-return-value warnings */
-}
+++ /dev/null
-/*
- * ckconfig.c
- *
- * Copyright (C) 1991-1994, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- */
-
-/*
- * This program is intended to help you determine how to configure the JPEG
- * software for installation on a particular system. The idea is to try to
- * compile and execute this program. If your compiler fails to compile the
- * program, make changes as indicated in the comments below. Once you can
- * compile the program, run it, and it will produce a "jconfig.h" file for
- * your system.
- *
- * As a general rule, each time you try to compile this program,
- * pay attention only to the *first* error message you get from the compiler.
- * Many C compilers will issue lots of spurious error messages once they
- * have gotten confused. Go to the line indicated in the first error message,
- * and read the comments preceding that line to see what to change.
- *
- * Almost all of the edits you may need to make to this program consist of
- * changing a line that reads "#define SOME_SYMBOL" to "#undef SOME_SYMBOL",
- * or vice versa. This is called defining or undefining that symbol.
- */
-
-
-/* First we must see if your system has the include files we need.
- * We start out with the assumption that your system has all the ANSI-standard
- * include files. If you get any error trying to include one of these files,
- * undefine the corresponding HAVE_xxx symbol.
- */
-
-#define HAVE_STDDEF_H /* replace 'define' by 'undef' if error here */
-#ifdef HAVE_STDDEF_H /* next line will be skipped if you undef... */
-#include <stddef.h>
-#endif
-
-#define HAVE_STDLIB_H /* same thing for stdlib.h */
-#ifdef HAVE_STDLIB_H
-#include <stdlib.h>
-#endif
-
-#include <stdio.h> /* If you ain't got this, you ain't got C. */
-
-/* We have to see if your string functions are defined by
- * strings.h (old BSD convention) or string.h (everybody else).
- * We try the non-BSD convention first; define NEED_BSD_STRINGS
- * if the compiler says it can't find string.h.
- */
-
-#undef NEED_BSD_STRINGS
-
-#ifdef NEED_BSD_STRINGS
-#include <strings.h>
-#else
-#include <string.h>
-#endif
-
-/* On some systems (especially older Unix machines), type size_t is
- * defined only in the include file <sys/types.h>. If you get a failure
- * on the size_t test below, try defining NEED_SYS_TYPES_H.
- */
-
-#undef NEED_SYS_TYPES_H /* start by assuming we don't need it */
-#ifdef NEED_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-
-
-/* Usually type size_t is defined in one of the include files we've included
- * above. If not, you'll get an error on the "typedef size_t my_size_t;" line.
- * In that case, first try defining NEED_SYS_TYPES_H just above.
- * If that doesn't work, you'll have to search through your system library
- * to figure out which include file defines "size_t". Look for a line that
- * says "typedef something-or-other size_t;". Then, change the line below
- * that says "#include <someincludefile.h>" to instead include the file
- * you found size_t in, and define NEED_SPECIAL_INCLUDE. If you can't find
- * type size_t anywhere, try replacing "#include <someincludefile.h>" with
- * "typedef unsigned int size_t;".
- */
-
-#undef NEED_SPECIAL_INCLUDE /* assume we DON'T need it, for starters */
-
-#ifdef NEED_SPECIAL_INCLUDE
-#include <someincludefile.h>
-#endif
-
-typedef size_t my_size_t; /* The payoff: do we have size_t now? */
-
-
-/* The next question is whether your compiler supports ANSI-style function
- * prototypes. You need to know this in order to choose between using
- * makefile.ansi and using makefile.unix.
- * The #define line below is set to assume you have ANSI function prototypes.
- * If you get an error in this group of lines, undefine HAVE_PROTOTYPES.
- */
-
-#define HAVE_PROTOTYPES
-
-#ifdef HAVE_PROTOTYPES
-int testfunction (int arg1, int * arg2); /* check prototypes */
-
-struct methods_struct { /* check method-pointer declarations */
- int (*error_exit) (char *msgtext);
- int (*trace_message) (char *msgtext);
- int (*another_method) (void);
-};
-
-int testfunction (int arg1, int * arg2) /* check definitions */
-{
- return arg2[arg1];
-}
-
-int test2function (void) /* check void arg list */
-{
- return 0;
-}
-#endif
-
-
-/* Now we want to find out if your compiler knows what "unsigned char" means.
- * If you get an error on the "unsigned char un_char;" line,
- * then undefine HAVE_UNSIGNED_CHAR.
- */
-
-#define HAVE_UNSIGNED_CHAR
-
-#ifdef HAVE_UNSIGNED_CHAR
-unsigned char un_char;
-#endif
-
-
-/* Now we want to find out if your compiler knows what "unsigned short" means.
- * If you get an error on the "unsigned short un_short;" line,
- * then undefine HAVE_UNSIGNED_SHORT.
- */
-
-#define HAVE_UNSIGNED_SHORT
-
-#ifdef HAVE_UNSIGNED_SHORT
-unsigned short un_short;
-#endif
-
-
-/* Now we want to find out if your compiler understands type "void".
- * If you get an error anywhere in here, undefine HAVE_VOID.
- */
-
-#define HAVE_VOID
-
-#ifdef HAVE_VOID
-/* Caution: a C++ compiler will insist on complete prototypes */
-typedef void * void_ptr; /* check void * */
-#ifdef HAVE_PROTOTYPES /* check ptr to function returning void */
-typedef void (*void_func) (int a, int b);
-#else
-typedef void (*void_func) ();
-#endif
-
-#ifdef HAVE_PROTOTYPES /* check void function result */
-void test3function (void_ptr arg1, void_func arg2)
-#else
-void test3function (arg1, arg2)
- void_ptr arg1;
- void_func arg2;
-#endif
-{
- char * locptr = (char *) arg1; /* check casting to and from void * */
- arg1 = (void *) locptr;
- (*arg2) (1, 2); /* check call of fcn returning void */
-}
-#endif
-
-
-/* Now we want to find out if your compiler knows what "const" means.
- * If you get an error here, undefine HAVE_CONST.
- */
-
-#define HAVE_CONST
-
-#ifdef HAVE_CONST
-static const int carray[3] = {1, 2, 3};
-
-#ifdef HAVE_PROTOTYPES
-int test4function (const int arg1)
-#else
-int test4function (arg1)
- const int arg1;
-#endif
-{
- return carray[arg1];
-}
-#endif
-
-
-/* If you get an error or warning about this structure definition,
- * define INCOMPLETE_TYPES_BROKEN.
- */
-
-#undef INCOMPLETE_TYPES_BROKEN
-
-#ifndef INCOMPLETE_TYPES_BROKEN
-typedef struct undefined_structure * undef_struct_ptr;
-#endif
-
-
-/* If you get an error about duplicate names,
- * define NEED_SHORT_EXTERNAL_NAMES.
- */
-
-#undef NEED_SHORT_EXTERNAL_NAMES
-
-#ifndef NEED_SHORT_EXTERNAL_NAMES
-
-int possibly_duplicate_function ()
-{
- return 0;
-}
-
-int possibly_dupli_function ()
-{
- return 1;
-}
-
-#endif
-
-
-
-/************************************************************************
- * OK, that's it. You should not have to change anything beyond this
- * point in order to compile and execute this program. (You might get
- * some warnings, but you can ignore them.)
- * When you run the program, it will make a couple more tests that it
- * can do automatically, and then it will create jconfig.h and print out
- * any additional suggestions it has.
- ************************************************************************
- */
-
-
-#ifdef HAVE_PROTOTYPES
-int is_char_signed (int arg)
-#else
-int is_char_signed (arg)
- int arg;
-#endif
-{
- if (arg == 189) { /* expected result for unsigned char */
- return 0; /* type char is unsigned */
- }
- else if (arg != -67) { /* expected result for signed char */
- printf("Hmm, it seems 'char' is not eight bits wide on your machine.\n");
- printf("I fear the JPEG software will not work at all.\n\n");
- }
- return 1; /* assume char is signed otherwise */
-}
-
-
-#ifdef HAVE_PROTOTYPES
-int is_shifting_signed (long arg)
-#else
-int is_shifting_signed (arg)
- long arg;
-#endif
-/* See whether right-shift on a long is signed or not. */
-{
- long res = arg >> 4;
-
- if (res == -0x7F7E80CL) { /* expected result for signed shift */
- return 1; /* right shift is signed */
- }
- /* see if unsigned-shift hack will fix it. */
- /* we can't just test exact value since it depends on width of long... */
- res |= (~0L) << (32-4);
- if (res == -0x7F7E80CL) { /* expected result now? */
- return 0; /* right shift is unsigned */
- }
- printf("Right shift isn't acting as I expect it to.\n");
- printf("I fear the JPEG software will not work at all.\n\n");
- return 0; /* try it with unsigned anyway */
-}
-
-
-#ifdef HAVE_PROTOTYPES
-int main (int argc, char ** argv)
-#else
-int main (argc, argv)
- int argc;
- char ** argv;
-#endif
-{
- char signed_char_check = (char) (-67);
- FILE *outfile;
-
- /* Attempt to write jconfig.h */
- if ((outfile = fopen("jconfig.h", "w")) == NULL) {
- printf("Failed to write jconfig.h\n");
- return 1;
- }
-
- /* Write out all the info */
- fprintf(outfile, "/* jconfig.h --- generated by ckconfig.c */\n");
- fprintf(outfile, "/* see jconfig.doc for explanations */\n\n");
-#ifdef HAVE_PROTOTYPES
- fprintf(outfile, "#define HAVE_PROTOTYPES\n");
-#else
- fprintf(outfile, "#undef HAVE_PROTOTYPES\n");
-#endif
-#ifdef HAVE_UNSIGNED_CHAR
- fprintf(outfile, "#define HAVE_UNSIGNED_CHAR\n");
-#else
- fprintf(outfile, "#undef HAVE_UNSIGNED_CHAR\n");
-#endif
-#ifdef HAVE_UNSIGNED_SHORT
- fprintf(outfile, "#define HAVE_UNSIGNED_SHORT\n");
-#else
- fprintf(outfile, "#undef HAVE_UNSIGNED_SHORT\n");
-#endif
-#ifdef HAVE_VOID
- fprintf(outfile, "/* #define void char */\n");
-#else
- fprintf(outfile, "#define void char\n");
-#endif
-#ifdef HAVE_CONST
- fprintf(outfile, "/* #define const */\n");
-#else
- fprintf(outfile, "#define const\n");
-#endif
- if (is_char_signed((int) signed_char_check))
- fprintf(outfile, "#undef CHAR_IS_UNSIGNED\n");
- else
- fprintf(outfile, "#define CHAR_IS_UNSIGNED\n");
-#ifdef HAVE_STDDEF_H
- fprintf(outfile, "#define HAVE_STDDEF_H\n");
-#else
- fprintf(outfile, "#undef HAVE_STDDEF_H\n");
-#endif
-#ifdef HAVE_STDLIB_H
- fprintf(outfile, "#define HAVE_STDLIB_H\n");
-#else
- fprintf(outfile, "#undef HAVE_STDLIB_H\n");
-#endif
-#ifdef NEED_BSD_STRINGS
- fprintf(outfile, "#define NEED_BSD_STRINGS\n");
-#else
- fprintf(outfile, "#undef NEED_BSD_STRINGS\n");
-#endif
-#ifdef NEED_SYS_TYPES_H
- fprintf(outfile, "#define NEED_SYS_TYPES_H\n");
-#else
- fprintf(outfile, "#undef NEED_SYS_TYPES_H\n");
-#endif
- fprintf(outfile, "#undef NEED_FAR_POINTERS\n");
-#ifdef NEED_SHORT_EXTERNAL_NAMES
- fprintf(outfile, "#define NEED_SHORT_EXTERNAL_NAMES\n");
-#else
- fprintf(outfile, "#undef NEED_SHORT_EXTERNAL_NAMES\n");
-#endif
-#ifdef INCOMPLETE_TYPES_BROKEN
- fprintf(outfile, "#define INCOMPLETE_TYPES_BROKEN\n");
-#else
- fprintf(outfile, "#undef INCOMPLETE_TYPES_BROKEN\n");
-#endif
- fprintf(outfile, "\n#ifdef JPEG_INTERNALS\n\n");
- if (is_shifting_signed(-0x7F7E80B1L))
- fprintf(outfile, "#undef RIGHT_SHIFT_IS_UNSIGNED\n");
- else
- fprintf(outfile, "#define RIGHT_SHIFT_IS_UNSIGNED\n");
- fprintf(outfile, "\n#endif /* JPEG_INTERNALS */\n");
- fprintf(outfile, "\n#ifdef JPEG_CJPEG_DJPEG\n\n");
- fprintf(outfile, "#define BMP_SUPPORTED /* BMP image file format */\n");
- fprintf(outfile, "#define GIF_SUPPORTED /* GIF image file format */\n");
- fprintf(outfile, "#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */\n");
- fprintf(outfile, "#undef RLE_SUPPORTED /* Utah RLE image file format */\n");
- fprintf(outfile, "#define TARGA_SUPPORTED /* Targa image file format */\n\n");
- fprintf(outfile, "#undef TWO_FILE_COMMANDLINE /* You may need this on non-Unix systems */\n");
- fprintf(outfile, "#undef NEED_SIGNAL_CATCHER /* Define this if you use jmemname.c */\n");
- fprintf(outfile, "#undef DONT_USE_B_MODE\n");
- fprintf(outfile, "/* #define PROGRESS_REPORT */ /* optional */\n");
- fprintf(outfile, "\n#endif /* JPEG_CJPEG_DJPEG */\n");
-
- /* Close the jconfig.h file */
- fclose(outfile);
-
- /* User report */
- printf("Configuration check for Independent JPEG Group's software done.\n");
- printf("\nI have written the jconfig.h file for you.\n\n");
-#ifdef HAVE_PROTOTYPES
- printf("You should use makefile.ansi as the starting point for your Makefile.\n");
-#else
- printf("You should use makefile.unix as the starting point for your Makefile.\n");
-#endif
-
-#ifdef NEED_SPECIAL_INCLUDE
- printf("\nYou'll need to change jconfig.h to include the system include file\n");
- printf("that you found type size_t in, or add a direct definition of type\n");
- printf("size_t if that's what you used. Just add it to the end.\n");
-#endif
-
- return 0;
-}
+++ /dev/null
-IJG JPEG LIBRARY: CODING RULES
-
-Copyright (C) 1991-1996, Thomas G. Lane.
-This file is part of the Independent JPEG Group's software.
-For conditions of distribution and use, see the accompanying README file.
-
-
-Since numerous people will be contributing code and bug fixes, it's important
-to establish a common coding style. The goal of using similar coding styles
-is much more important than the details of just what that style is.
-
-In general we follow the recommendations of "Recommended C Style and Coding
-Standards" revision 6.1 (Cannon et al. as modified by Spencer, Keppel and
-Brader). This document is available in the IJG FTP archive (see
-jpeg/doc/cstyle.ms.tbl.Z, or cstyle.txt.Z for those without nroff/tbl).
-
-Block comments should be laid out thusly:
-
-/*
- * Block comments in this style.
- */
-
-We indent statements in K&R style, e.g.,
- if (test) {
- then-part;
- } else {
- else-part;
- }
-with two spaces per indentation level. (This indentation convention is
-handled automatically by GNU Emacs and many other text editors.)
-
-Multi-word names should be written in lower case with underscores, e.g.,
-multi_word_name (not multiWordName). Preprocessor symbols and enum constants
-are similar but upper case (MULTI_WORD_NAME). Names should be unique within
-the first fifteen characters. (On some older systems, global names must be
-unique within six characters. We accommodate this without cluttering the
-source code by using macros to substitute shorter names.)
-
-We use function prototypes everywhere; we rely on automatic source code
-transformation to feed prototype-less C compilers. Transformation is done
-by the simple and portable tool 'ansi2knr.c' (courtesy of Ghostscript).
-ansi2knr is not very bright, so it imposes a format requirement on function
-declarations: the function name MUST BEGIN IN COLUMN 1. Thus all functions
-should be written in the following style:
-
-LOCAL(int *)
-function_name (int a, char *b)
-{
- code...
-}
-
-Note that each function definition must begin with GLOBAL(type), LOCAL(type),
-or METHODDEF(type). These macros expand to "static type" or just "type" as
-appropriate. They provide a readable indication of the routine's usage and
-can readily be changed for special needs. (For instance, special linkage
-keywords can be inserted for use in Windows DLLs.)
-
-ansi2knr does not transform method declarations (function pointers in
-structs). We handle these with a macro JMETHOD, defined as
- #ifdef HAVE_PROTOTYPES
- #define JMETHOD(type,methodname,arglist) type (*methodname) arglist
- #else
- #define JMETHOD(type,methodname,arglist) type (*methodname) ()
- #endif
-which is used like this:
- struct function_pointers {
- JMETHOD(void, init_entropy_encoder, (int somearg, jparms *jp));
- JMETHOD(void, term_entropy_encoder, (void));
- };
-Note the set of parentheses surrounding the parameter list.
-
-A similar solution is used for forward and external function declarations
-(see the EXTERN and JPP macros).
-
-If the code is to work on non-ANSI compilers, we cannot rely on a prototype
-declaration to coerce actual parameters into the right types. Therefore, use
-explicit casts on actual parameters whenever the actual parameter type is not
-identical to the formal parameter. Beware of implicit conversions to "int".
-
-It seems there are some non-ANSI compilers in which the sizeof() operator
-is defined to return int, yet size_t is defined as long. Needless to say,
-this is brain-damaged. Always use the SIZEOF() macro in place of sizeof(),
-so that the result is guaranteed to be of type size_t.
-
-
-The JPEG library is intended to be used within larger programs. Furthermore,
-we want it to be reentrant so that it can be used by applications that process
-multiple images concurrently. The following rules support these requirements:
-
-1. Avoid direct use of file I/O, "malloc", error report printouts, etc;
-pass these through the common routines provided.
-
-2. Minimize global namespace pollution. Functions should be declared static
-wherever possible. (Note that our method-based calling conventions help this
-a lot: in many modules only the initialization function will ever need to be
-called directly, so only that function need be externally visible.) All
-global function names should begin with "jpeg_", and should have an
-abbreviated name (unique in the first six characters) substituted by macro
-when NEED_SHORT_EXTERNAL_NAMES is set.
-
-3. Don't use global variables; anything that must be used in another module
-should be in the common data structures.
-
-4. Don't use static variables except for read-only constant tables. Variables
-that should be private to a module can be placed into private structures (see
-the system architecture document, structure.doc).
-
-5. Source file names should begin with "j" for files that are part of the
-library proper; source files that are not part of the library, such as cjpeg.c
-and djpeg.c, do not begin with "j". Keep source file names to eight
-characters (plus ".c" or ".h", etc) to make life easy for MS-DOSers. Keep
-compression and decompression code in separate source files --- some
-applications may want only one half of the library.
-
-Note: these rules (particularly #4) are not followed religiously in the
-modules that are used in cjpeg/djpeg but are not part of the JPEG library
-proper. Those modules are not really intended to be used in other
-applications.
+++ /dev/null
-.TH DJPEG 1 "22 August 1997"
-.SH NAME
-djpeg \- decompress a JPEG file to an image file
-.SH SYNOPSIS
-.B djpeg
-[
-.I options
-]
-[
-.I filename
-]
-.LP
-.SH DESCRIPTION
-.LP
-.B djpeg
-decompresses the named JPEG file, or the standard input if no file is named,
-and produces an image file on the standard output. PBMPLUS (PPM/PGM), BMP,
-GIF, Targa, or RLE (Utah Raster Toolkit) output format can be selected.
-(RLE is supported only if the URT library is available.)
-.SH OPTIONS
-All switch names may be abbreviated; for example,
-.B \-grayscale
-may be written
-.B \-gray
-or
-.BR \-gr .
-Most of the "basic" switches can be abbreviated to as little as one letter.
-Upper and lower case are equivalent (thus
-.B \-BMP
-is the same as
-.BR \-bmp ).
-British spellings are also accepted (e.g.,
-.BR \-greyscale ),
-though for brevity these are not mentioned below.
-.PP
-The basic switches are:
-.TP
-.BI \-colors " N"
-Reduce image to at most N colors. This reduces the number of colors used in
-the output image, so that it can be displayed on a colormapped display or
-stored in a colormapped file format. For example, if you have an 8-bit
-display, you'd need to reduce to 256 or fewer colors.
-.TP
-.BI \-quantize " N"
-Same as
-.BR \-colors .
-.B \-colors
-is the recommended name,
-.B \-quantize
-is provided only for backwards compatibility.
-.TP
-.B \-fast
-Select recommended processing options for fast, low quality output. (The
-default options are chosen for highest quality output.) Currently, this is
-equivalent to \fB\-dct fast \-nosmooth \-onepass \-dither ordered\fR.
-.TP
-.B \-grayscale
-Force gray-scale output even if JPEG file is color. Useful for viewing on
-monochrome displays; also,
-.B djpeg
-runs noticeably faster in this mode.
-.TP
-.BI \-scale " M/N"
-Scale the output image by a factor M/N. Currently the scale factor must be
-1/1, 1/2, 1/4, or 1/8. Scaling is handy if the image is larger than your
-screen; also,
-.B djpeg
-runs much faster when scaling down the output.
-.TP
-.B \-bmp
-Select BMP output format (Windows flavor). 8-bit colormapped format is
-emitted if
-.B \-colors
-or
-.B \-grayscale
-is specified, or if the JPEG file is gray-scale; otherwise, 24-bit full-color
-format is emitted.
-.TP
-.B \-gif
-Select GIF output format. Since GIF does not support more than 256 colors,
-.B \-colors 256
-is assumed (unless you specify a smaller number of colors).
-.TP
-.B \-os2
-Select BMP output format (OS/2 1.x flavor). 8-bit colormapped format is
-emitted if
-.B \-colors
-or
-.B \-grayscale
-is specified, or if the JPEG file is gray-scale; otherwise, 24-bit full-color
-format is emitted.
-.TP
-.B \-pnm
-Select PBMPLUS (PPM/PGM) output format (this is the default format).
-PGM is emitted if the JPEG file is gray-scale or if
-.B \-grayscale
-is specified; otherwise PPM is emitted.
-.TP
-.B \-rle
-Select RLE output format. (Requires URT library.)
-.TP
-.B \-targa
-Select Targa output format. Gray-scale format is emitted if the JPEG file is
-gray-scale or if
-.B \-grayscale
-is specified; otherwise, colormapped format is emitted if
-.B \-colors
-is specified; otherwise, 24-bit full-color format is emitted.
-.PP
-Switches for advanced users:
-.TP
-.B \-dct int
-Use integer DCT method (default).
-.TP
-.B \-dct fast
-Use fast integer DCT (less accurate).
-.TP
-.B \-dct float
-Use floating-point DCT method.
-The float method is very slightly more accurate than the int method, but is
-much slower unless your machine has very fast floating-point hardware. Also
-note that results of the floating-point method may vary slightly across
-machines, while the integer methods should give the same results everywhere.
-The fast integer method is much less accurate than the other two.
-.TP
-.B \-dither fs
-Use Floyd-Steinberg dithering in color quantization.
-.TP
-.B \-dither ordered
-Use ordered dithering in color quantization.
-.TP
-.B \-dither none
-Do not use dithering in color quantization.
-By default, Floyd-Steinberg dithering is applied when quantizing colors; this
-is slow but usually produces the best results. Ordered dither is a compromise
-between speed and quality; no dithering is fast but usually looks awful. Note
-that these switches have no effect unless color quantization is being done.
-Ordered dither is only available in
-.B \-onepass
-mode.
-.TP
-.BI \-map " file"
-Quantize to the colors used in the specified image file. This is useful for
-producing multiple files with identical color maps, or for forcing a
-predefined set of colors to be used. The
-.I file
-must be a GIF or PPM file. This option overrides
-.B \-colors
-and
-.BR \-onepass .
-.TP
-.B \-nosmooth
-Use a faster, lower-quality upsampling routine.
-.TP
-.B \-onepass
-Use one-pass instead of two-pass color quantization. The one-pass method is
-faster and needs less memory, but it produces a lower-quality image.
-.B \-onepass
-is ignored unless you also say
-.B \-colors
-.IR N .
-Also, the one-pass method is always used for gray-scale output (the two-pass
-method is no improvement then).
-.TP
-.BI \-maxmemory " N"
-Set limit for amount of memory to use in processing large images. Value is
-in thousands of bytes, or millions of bytes if "M" is attached to the
-number. For example,
-.B \-max 4m
-selects 4000000 bytes. If more space is needed, temporary files will be used.
-.TP
-.BI \-outfile " name"
-Send output image to the named file, not to standard output.
-.TP
-.B \-verbose
-Enable debug printout. More
-.BR \-v 's
-give more output. Also, version information is printed at startup.
-.TP
-.B \-debug
-Same as
-.BR \-verbose .
-.SH EXAMPLES
-.LP
-This example decompresses the JPEG file foo.jpg, quantizes it to
-256 colors, and saves the output in 8-bit BMP format in foo.bmp:
-.IP
-.B djpeg \-colors 256 \-bmp
-.I foo.jpg
-.B >
-.I foo.bmp
-.SH HINTS
-To get a quick preview of an image, use the
-.B \-grayscale
-and/or
-.B \-scale
-switches.
-.B \-grayscale \-scale 1/8
-is the fastest case.
-.PP
-Several options are available that trade off image quality to gain speed.
-.B \-fast
-turns on the recommended settings.
-.PP
-.B \-dct fast
-and/or
-.B \-nosmooth
-gain speed at a small sacrifice in quality.
-When producing a color-quantized image,
-.B \-onepass \-dither ordered
-is fast but much lower quality than the default behavior.
-.B \-dither none
-may give acceptable results in two-pass mode, but is seldom tolerable in
-one-pass mode.
-.PP
-If you are fortunate enough to have very fast floating point hardware,
-\fB\-dct float\fR may be even faster than \fB\-dct fast\fR. But on most
-machines \fB\-dct float\fR is slower than \fB\-dct int\fR; in this case it is
-not worth using, because its theoretical accuracy advantage is too small to be
-significant in practice.
-.SH ENVIRONMENT
-.TP
-.B JPEGMEM
-If this environment variable is set, its value is the default memory limit.
-The value is specified as described for the
-.B \-maxmemory
-switch.
-.B JPEGMEM
-overrides the default value specified when the program was compiled, and
-itself is overridden by an explicit
-.BR \-maxmemory .
-.SH SEE ALSO
-.BR cjpeg (1),
-.BR jpegtran (1),
-.BR rdjpgcom (1),
-.BR wrjpgcom (1)
-.br
-.BR ppm (5),
-.BR pgm (5)
-.br
-Wallace, Gregory K. "The JPEG Still Picture Compression Standard",
-Communications of the ACM, April 1991 (vol. 34, no. 4), pp. 30-44.
-.SH AUTHOR
-Independent JPEG Group
-.SH BUGS
-Arithmetic coding is not supported for legal reasons.
-.PP
-To avoid the Unisys LZW patent,
-.B djpeg
-produces uncompressed GIF files. These are larger than they should be, but
-are readable by standard GIF decoders.
-.PP
-Still not as fast as we'd like.
+++ /dev/null
-/*
- * djpeg.c
- *
- * Copyright (C) 1991-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains a command-line user interface for the JPEG decompressor.
- * It should work on any system with Unix- or MS-DOS-style command lines.
- *
- * Two different command line styles are permitted, depending on the
- * compile-time switch TWO_FILE_COMMANDLINE:
- * djpeg [options] inputfile outputfile
- * djpeg [options] [inputfile]
- * In the second style, output is always to standard output, which you'd
- * normally redirect to a file or pipe to some other program. Input is
- * either from a named file or from standard input (typically redirected).
- * The second style is convenient on Unix but is unhelpful on systems that
- * don't support pipes. Also, you MUST use the first style if your system
- * doesn't do binary I/O to stdin/stdout.
- * To simplify script writing, the "-outfile" switch is provided. The syntax
- * djpeg [options] -outfile outputfile inputfile
- * works regardless of which command line style is used.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-#include "jversion.h" /* for version message */
-
-#include <ctype.h> /* to declare isprint() */
-
-#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
-#ifdef __MWERKS__
-#include <SIOUX.h> /* Metrowerks needs this */
-#include <console.h> /* ... and this */
-#endif
-#ifdef THINK_C
-#include <console.h> /* Think declares it here */
-#endif
-#endif
-
-
-/* Create the add-on message string table. */
-
-#define JMESSAGE(code,string) string ,
-
-static const char * const cdjpeg_message_table[] = {
-#include "cderror.h"
- NULL
-};
-
-
-/*
- * This list defines the known output image formats
- * (not all of which need be supported by a given version).
- * You can change the default output format by defining DEFAULT_FMT;
- * indeed, you had better do so if you undefine PPM_SUPPORTED.
- */
-
-typedef enum {
- FMT_BMP, /* BMP format (Windows flavor) */
- FMT_GIF, /* GIF format */
- FMT_OS2, /* BMP format (OS/2 flavor) */
- FMT_PPM, /* PPM/PGM (PBMPLUS formats) */
- FMT_RLE, /* RLE format */
- FMT_TARGA, /* Targa format */
- FMT_TIFF /* TIFF format */
-} IMAGE_FORMATS;
-
-#ifndef DEFAULT_FMT /* so can override from CFLAGS in Makefile */
-#define DEFAULT_FMT FMT_PPM
-#endif
-
-static IMAGE_FORMATS requested_fmt;
-
-
-/*
- * Argument-parsing code.
- * The switch parser is designed to be useful with DOS-style command line
- * syntax, ie, intermixed switches and file names, where only the switches
- * to the left of a given file name affect processing of that file.
- * The main program in this file doesn't actually use this capability...
- */
-
-
-static const char * progname; /* program name for error messages */
-static char * outfilename; /* for -outfile switch */
-
-
-LOCAL(void)
-usage (void)
-/* complain about bad command line */
-{
- fprintf(stderr, "usage: %s [switches] ", progname);
-#ifdef TWO_FILE_COMMANDLINE
- fprintf(stderr, "inputfile outputfile\n");
-#else
- fprintf(stderr, "[inputfile]\n");
-#endif
-
- fprintf(stderr, "Switches (names may be abbreviated):\n");
- fprintf(stderr, " -colors N Reduce image to no more than N colors\n");
- fprintf(stderr, " -fast Fast, low-quality processing\n");
- fprintf(stderr, " -grayscale Force grayscale output\n");
-#ifdef IDCT_SCALING_SUPPORTED
- fprintf(stderr, " -scale M/N Scale output image by fraction M/N, eg, 1/8\n");
-#endif
-#ifdef BMP_SUPPORTED
- fprintf(stderr, " -bmp Select BMP output format (Windows style)%s\n",
- (DEFAULT_FMT == FMT_BMP ? " (default)" : ""));
-#endif
-#ifdef GIF_SUPPORTED
- fprintf(stderr, " -gif Select GIF output format%s\n",
- (DEFAULT_FMT == FMT_GIF ? " (default)" : ""));
-#endif
-#ifdef BMP_SUPPORTED
- fprintf(stderr, " -os2 Select BMP output format (OS/2 style)%s\n",
- (DEFAULT_FMT == FMT_OS2 ? " (default)" : ""));
-#endif
-#ifdef PPM_SUPPORTED
- fprintf(stderr, " -pnm Select PBMPLUS (PPM/PGM) output format%s\n",
- (DEFAULT_FMT == FMT_PPM ? " (default)" : ""));
-#endif
-#ifdef RLE_SUPPORTED
- fprintf(stderr, " -rle Select Utah RLE output format%s\n",
- (DEFAULT_FMT == FMT_RLE ? " (default)" : ""));
-#endif
-#ifdef TARGA_SUPPORTED
- fprintf(stderr, " -targa Select Targa output format%s\n",
- (DEFAULT_FMT == FMT_TARGA ? " (default)" : ""));
-#endif
- fprintf(stderr, "Switches for advanced users:\n");
-#ifdef DCT_ISLOW_SUPPORTED
- fprintf(stderr, " -dct int Use integer DCT method%s\n",
- (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
-#endif
-#ifdef DCT_IFAST_SUPPORTED
- fprintf(stderr, " -dct fast Use fast integer DCT (less accurate)%s\n",
- (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
-#endif
-#ifdef DCT_FLOAT_SUPPORTED
- fprintf(stderr, " -dct float Use floating-point DCT method%s\n",
- (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
-#endif
- fprintf(stderr, " -dither fs Use F-S dithering (default)\n");
- fprintf(stderr, " -dither none Don't use dithering in quantization\n");
- fprintf(stderr, " -dither ordered Use ordered dither (medium speed, quality)\n");
-#ifdef QUANT_2PASS_SUPPORTED
- fprintf(stderr, " -map FILE Map to colors used in named image file\n");
-#endif
- fprintf(stderr, " -nosmooth Don't use high-quality upsampling\n");
-#ifdef QUANT_1PASS_SUPPORTED
- fprintf(stderr, " -onepass Use 1-pass quantization (fast, low quality)\n");
-#endif
- fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
- fprintf(stderr, " -outfile name Specify name for output file\n");
- fprintf(stderr, " -verbose or -debug Emit debug output\n");
- exit(EXIT_FAILURE);
-}
-
-
-LOCAL(int)
-parse_switches (j_decompress_ptr cinfo, int argc, char **argv,
- int last_file_arg_seen, boolean for_real)
-/* Parse optional switches.
- * Returns argv[] index of first file-name argument (== argc if none).
- * Any file names with indexes <= last_file_arg_seen are ignored;
- * they have presumably been processed in a previous iteration.
- * (Pass 0 for last_file_arg_seen on the first or only iteration.)
- * for_real is FALSE on the first (dummy) pass; we may skip any expensive
- * processing.
- */
-{
- int argn;
- char * arg;
-
- /* Set up default JPEG parameters. */
- requested_fmt = DEFAULT_FMT; /* set default output file format */
- outfilename = NULL;
- cinfo->err->trace_level = 0;
-
- /* Scan command line options, adjust parameters */
-
- for (argn = 1; argn < argc; argn++) {
- arg = argv[argn];
- if (*arg != '-') {
- /* Not a switch, must be a file name argument */
- if (argn <= last_file_arg_seen) {
- outfilename = NULL; /* -outfile applies to just one input file */
- continue; /* ignore this name if previously processed */
- }
- break; /* else done parsing switches */
- }
- arg++; /* advance past switch marker character */
-
- if (keymatch(arg, "bmp", 1)) {
- /* BMP output format. */
- requested_fmt = FMT_BMP;
-
- } else if (keymatch(arg, "colors", 1) || keymatch(arg, "colours", 1) ||
- keymatch(arg, "quantize", 1) || keymatch(arg, "quantise", 1)) {
- /* Do color quantization. */
- int val;
-
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%d", &val) != 1)
- usage();
- cinfo->desired_number_of_colors = val;
- cinfo->quantize_colors = TRUE;
-
- } else if (keymatch(arg, "dct", 2)) {
- /* Select IDCT algorithm. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (keymatch(argv[argn], "int", 1)) {
- cinfo->dct_method = JDCT_ISLOW;
- } else if (keymatch(argv[argn], "fast", 2)) {
- cinfo->dct_method = JDCT_IFAST;
- } else if (keymatch(argv[argn], "float", 2)) {
- cinfo->dct_method = JDCT_FLOAT;
- } else
- usage();
-
- } else if (keymatch(arg, "dither", 2)) {
- /* Select dithering algorithm. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (keymatch(argv[argn], "fs", 2)) {
- cinfo->dither_mode = JDITHER_FS;
- } else if (keymatch(argv[argn], "none", 2)) {
- cinfo->dither_mode = JDITHER_NONE;
- } else if (keymatch(argv[argn], "ordered", 2)) {
- cinfo->dither_mode = JDITHER_ORDERED;
- } else
- usage();
-
- } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
- /* Enable debug printouts. */
- /* On first -d, print version identification */
- static boolean printed_version = FALSE;
-
- if (! printed_version) {
- fprintf(stderr, "Independent JPEG Group's DJPEG, version %s\n%s\n",
- JVERSION, JCOPYRIGHT);
- printed_version = TRUE;
- }
- cinfo->err->trace_level++;
-
- } else if (keymatch(arg, "fast", 1)) {
- /* Select recommended processing options for quick-and-dirty output. */
- cinfo->two_pass_quantize = FALSE;
- cinfo->dither_mode = JDITHER_ORDERED;
- if (! cinfo->quantize_colors) /* don't override an earlier -colors */
- cinfo->desired_number_of_colors = 216;
- cinfo->dct_method = JDCT_FASTEST;
- cinfo->do_fancy_upsampling = FALSE;
-
- } else if (keymatch(arg, "gif", 1)) {
- /* GIF output format. */
- requested_fmt = FMT_GIF;
-
- } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
- /* Force monochrome output. */
- cinfo->out_color_space = JCS_GRAYSCALE;
-
- } else if (keymatch(arg, "map", 3)) {
- /* Quantize to a color map taken from an input file. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (for_real) { /* too expensive to do twice! */
-#ifdef QUANT_2PASS_SUPPORTED /* otherwise can't quantize to supplied map */
- FILE * mapfile;
-
- if ((mapfile = fopen(argv[argn], READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
- exit(EXIT_FAILURE);
- }
- read_color_map(cinfo, mapfile);
- fclose(mapfile);
- cinfo->quantize_colors = TRUE;
-#else
- ERREXIT(cinfo, JERR_NOT_COMPILED);
-#endif
- }
-
- } else if (keymatch(arg, "maxmemory", 3)) {
- /* Maximum memory in Kb (or Mb with 'm'). */
- long lval;
- char ch = 'x';
-
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
- usage();
- if (ch == 'm' || ch == 'M')
- lval *= 1000L;
- cinfo->mem->max_memory_to_use = lval * 1000L;
-
- } else if (keymatch(arg, "nosmooth", 3)) {
- /* Suppress fancy upsampling */
- cinfo->do_fancy_upsampling = FALSE;
-
- } else if (keymatch(arg, "onepass", 3)) {
- /* Use fast one-pass quantization. */
- cinfo->two_pass_quantize = FALSE;
-
- } else if (keymatch(arg, "os2", 3)) {
- /* BMP output format (OS/2 flavor). */
- requested_fmt = FMT_OS2;
-
- } else if (keymatch(arg, "outfile", 4)) {
- /* Set output file name. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- outfilename = argv[argn]; /* save it away for later use */
-
- } else if (keymatch(arg, "pnm", 1) || keymatch(arg, "ppm", 1)) {
- /* PPM/PGM output format. */
- requested_fmt = FMT_PPM;
-
- } else if (keymatch(arg, "rle", 1)) {
- /* RLE output format. */
- requested_fmt = FMT_RLE;
-
- } else if (keymatch(arg, "scale", 1)) {
- /* Scale the output image by a fraction M/N. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%d/%d",
- &cinfo->scale_num, &cinfo->scale_denom) != 2)
- usage();
-
- } else if (keymatch(arg, "targa", 1)) {
- /* Targa output format. */
- requested_fmt = FMT_TARGA;
-
- } else {
- usage(); /* bogus switch */
- }
- }
-
- return argn; /* return index of next arg (file name) */
-}
-
-
-/*
- * Marker processor for COM and interesting APPn markers.
- * This replaces the library's built-in processor, which just skips the marker.
- * We want to print out the marker as text, to the extent possible.
- * Note this code relies on a non-suspending data source.
- */
-
-LOCAL(unsigned int)
-jpeg_getc (j_decompress_ptr cinfo)
-/* Read next byte */
-{
- struct jpeg_source_mgr * datasrc = cinfo->src;
-
- if (datasrc->bytes_in_buffer == 0) {
- if (! (*datasrc->fill_input_buffer) (cinfo))
- ERREXIT(cinfo, JERR_CANT_SUSPEND);
- }
- datasrc->bytes_in_buffer--;
- return GETJOCTET(*datasrc->next_input_byte++);
-}
-
-
-METHODDEF(boolean)
-print_text_marker (j_decompress_ptr cinfo)
-{
- boolean traceit = (cinfo->err->trace_level >= 1);
- INT32 length;
- unsigned int ch;
- unsigned int lastch = 0;
-
- length = jpeg_getc(cinfo) << 8;
- length += jpeg_getc(cinfo);
- length -= 2; /* discount the length word itself */
-
- if (traceit) {
- if (cinfo->unread_marker == JPEG_COM)
- fprintf(stderr, "Comment, length %ld:\n", (long) length);
- else /* assume it is an APPn otherwise */
- fprintf(stderr, "APP%d, length %ld:\n",
- cinfo->unread_marker - JPEG_APP0, (long) length);
- }
-
- while (--length >= 0) {
- ch = jpeg_getc(cinfo);
- if (traceit) {
- /* Emit the character in a readable form.
- * Nonprintables are converted to \nnn form,
- * while \ is converted to \\.
- * Newlines in CR, CR/LF, or LF form will be printed as one newline.
- */
- if (ch == '\r') {
- fprintf(stderr, "\n");
- } else if (ch == '\n') {
- if (lastch != '\r')
- fprintf(stderr, "\n");
- } else if (ch == '\\') {
- fprintf(stderr, "\\\\");
- } else if (isprint(ch)) {
- putc(ch, stderr);
- } else {
- fprintf(stderr, "\\%03o", ch);
- }
- lastch = ch;
- }
- }
-
- if (traceit)
- fprintf(stderr, "\n");
-
- return TRUE;
-}
-
-
-/*
- * The main program.
- */
-
-int
-main (int argc, char **argv)
-{
- struct jpeg_decompress_struct cinfo;
- struct jpeg_error_mgr jerr;
-#ifdef PROGRESS_REPORT
- struct cdjpeg_progress_mgr progress;
-#endif
- int file_index;
- djpeg_dest_ptr dest_mgr = NULL;
- FILE * input_file;
- FILE * output_file;
- JDIMENSION num_scanlines;
-
- /* On Mac, fetch a command line. */
-#ifdef USE_CCOMMAND
- argc = ccommand(&argv);
-#endif
-
- progname = argv[0];
- if (progname == NULL || progname[0] == 0)
- progname = "djpeg"; /* in case C library doesn't provide it */
-
- /* Initialize the JPEG decompression object with default error handling. */
- cinfo.err = jpeg_std_error(&jerr);
- jpeg_create_decompress(&cinfo);
- /* Add some application-specific error messages (from cderror.h) */
- jerr.addon_message_table = cdjpeg_message_table;
- jerr.first_addon_message = JMSG_FIRSTADDONCODE;
- jerr.last_addon_message = JMSG_LASTADDONCODE;
-
- /* Insert custom marker processor for COM and APP12.
- * APP12 is used by some digital camera makers for textual info,
- * so we provide the ability to display it as text.
- * If you like, additional APPn marker types can be selected for display,
- * but don't try to override APP0 or APP14 this way (see libjpeg.doc).
- */
- jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker);
- jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker);
-
- /* Now safe to enable signal catcher. */
-#ifdef NEED_SIGNAL_CATCHER
- enable_signal_catcher((j_common_ptr) &cinfo);
-#endif
-
- /* Scan command line to find file names. */
- /* It is convenient to use just one switch-parsing routine, but the switch
- * values read here are ignored; we will rescan the switches after opening
- * the input file.
- * (Exception: tracing level set here controls verbosity for COM markers
- * found during jpeg_read_header...)
- */
-
- file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
-
-#ifdef TWO_FILE_COMMANDLINE
- /* Must have either -outfile switch or explicit output file name */
- if (outfilename == NULL) {
- if (file_index != argc-2) {
- fprintf(stderr, "%s: must name one input and one output file\n",
- progname);
- usage();
- }
- outfilename = argv[file_index+1];
- } else {
- if (file_index != argc-1) {
- fprintf(stderr, "%s: must name one input and one output file\n",
- progname);
- usage();
- }
- }
-#else
- /* Unix style: expect zero or one file name */
- if (file_index < argc-1) {
- fprintf(stderr, "%s: only one input file\n", progname);
- usage();
- }
-#endif /* TWO_FILE_COMMANDLINE */
-
- /* Open the input file. */
- if (file_index < argc) {
- if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default input file is stdin */
- input_file = read_stdin();
- }
-
- /* Open the output file. */
- if (outfilename != NULL) {
- if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default output file is stdout */
- output_file = write_stdout();
- }
-
-#ifdef PROGRESS_REPORT
- start_progress_monitor((j_common_ptr) &cinfo, &progress);
-#endif
-
- /* Specify data source for decompression */
- jpeg_stdio_src(&cinfo, input_file);
-
- /* Read file header, set default decompression parameters */
- (void) jpeg_read_header(&cinfo, TRUE);
-
- /* Adjust default decompression parameters by re-parsing the options */
- file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
-
- /* Initialize the output module now to let it override any crucial
- * option settings (for instance, GIF wants to force color quantization).
- */
- switch (requested_fmt) {
-#ifdef BMP_SUPPORTED
- case FMT_BMP:
- dest_mgr = jinit_write_bmp(&cinfo, FALSE);
- break;
- case FMT_OS2:
- dest_mgr = jinit_write_bmp(&cinfo, TRUE);
- break;
-#endif
-#ifdef GIF_SUPPORTED
- case FMT_GIF:
- dest_mgr = jinit_write_gif(&cinfo);
- break;
-#endif
-#ifdef PPM_SUPPORTED
- case FMT_PPM:
- dest_mgr = jinit_write_ppm(&cinfo);
- break;
-#endif
-#ifdef RLE_SUPPORTED
- case FMT_RLE:
- dest_mgr = jinit_write_rle(&cinfo);
- break;
-#endif
-#ifdef TARGA_SUPPORTED
- case FMT_TARGA:
- dest_mgr = jinit_write_targa(&cinfo);
- break;
-#endif
- default:
- ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT);
- break;
- }
- dest_mgr->output_file = output_file;
-
- /* Start decompressor */
- (void) jpeg_start_decompress(&cinfo);
-
- /* Write output file header */
- (*dest_mgr->start_output) (&cinfo, dest_mgr);
-
- /* Process data */
- while (cinfo.output_scanline < cinfo.output_height) {
- num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
- dest_mgr->buffer_height);
- (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
- }
-
-#ifdef PROGRESS_REPORT
- /* Hack: count final pass as done in case finish_output does an extra pass.
- * The library won't have updated completed_passes.
- */
- progress.pub.completed_passes = progress.pub.total_passes;
-#endif
-
- /* Finish decompression and release memory.
- * I must do it in this order because output module has allocated memory
- * of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
- */
- (*dest_mgr->finish_output) (&cinfo, dest_mgr);
- (void) jpeg_finish_decompress(&cinfo);
- jpeg_destroy_decompress(&cinfo);
-
- /* Close files, if we opened them */
- if (input_file != stdin)
- fclose(input_file);
- if (output_file != stdout)
- fclose(output_file);
-
-#ifdef PROGRESS_REPORT
- end_progress_monitor((j_common_ptr) &cinfo);
-#endif
-
- /* All done. */
- exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
- return 0; /* suppress no-return-value warnings */
-}
+++ /dev/null
-/*
- * example.c
- *
- * This file illustrates how to use the IJG code as a subroutine library
- * to read or write JPEG image files. You should look at this code in
- * conjunction with the documentation file libjpeg.doc.
- *
- * This code will not do anything useful as-is, but it may be helpful as a
- * skeleton for constructing routines that call the JPEG library.
- *
- * We present these routines in the same coding style used in the JPEG code
- * (ANSI function definitions, etc); but you are of course free to code your
- * routines in a different style if you prefer.
- */
-
-#include <stdio.h>
-
-/*
- * Include file for users of JPEG library.
- * You will need to have included system headers that define at least
- * the typedefs FILE and size_t before you can include jpeglib.h.
- * (stdio.h is sufficient on ANSI-conforming systems.)
- * You may also wish to include "jerror.h".
- */
-
-#include "jpeglib.h"
-
-/*
- * <setjmp.h> is used for the optional error recovery mechanism shown in
- * the second part of the example.
- */
-
-#include <setjmp.h>
-
-
-
-/******************** JPEG COMPRESSION SAMPLE INTERFACE *******************/
-
-/* This half of the example shows how to feed data into the JPEG compressor.
- * We present a minimal version that does not worry about refinements such
- * as error recovery (the JPEG code will just exit() if it gets an error).
- */
-
-
-/*
- * IMAGE DATA FORMATS:
- *
- * The standard input image format is a rectangular array of pixels, with
- * each pixel having the same number of "component" values (color channels).
- * Each pixel row is an array of JSAMPLEs (which typically are unsigned chars).
- * If you are working with color data, then the color values for each pixel
- * must be adjacent in the row; for example, R,G,B,R,G,B,R,G,B,... for 24-bit
- * RGB color.
- *
- * For this example, we'll assume that this data structure matches the way
- * our application has stored the image in memory, so we can just pass a
- * pointer to our image buffer. In particular, let's say that the image is
- * RGB color and is described by:
- */
-
-extern JSAMPLE * image_buffer; /* Points to large array of R,G,B-order data */
-extern int image_height; /* Number of rows in image */
-extern int image_width; /* Number of columns in image */
-
-
-/*
- * Sample routine for JPEG compression. We assume that the target file name
- * and a compression quality factor are passed in.
- */
-
-GLOBAL(void)
-write_JPEG_file (char * filename, int quality)
-{
- /* This struct contains the JPEG compression parameters and pointers to
- * working space (which is allocated as needed by the JPEG library).
- * It is possible to have several such structures, representing multiple
- * compression/decompression processes, in existence at once. We refer
- * to any one struct (and its associated working data) as a "JPEG object".
- */
- struct jpeg_compress_struct cinfo;
- /* This struct represents a JPEG error handler. It is declared separately
- * because applications often want to supply a specialized error handler
- * (see the second half of this file for an example). But here we just
- * take the easy way out and use the standard error handler, which will
- * print a message on stderr and call exit() if compression fails.
- * Note that this struct must live as long as the main JPEG parameter
- * struct, to avoid dangling-pointer problems.
- */
- struct jpeg_error_mgr jerr;
- /* More stuff */
- FILE * outfile; /* target file */
- JSAMPROW row_pointer[1]; /* pointer to JSAMPLE row[s] */
- int row_stride; /* physical row width in image buffer */
-
- /* Step 1: allocate and initialize JPEG compression object */
-
- /* We have to set up the error handler first, in case the initialization
- * step fails. (Unlikely, but it could happen if you are out of memory.)
- * This routine fills in the contents of struct jerr, and returns jerr's
- * address which we place into the link field in cinfo.
- */
- cinfo.err = jpeg_std_error(&jerr);
- /* Now we can initialize the JPEG compression object. */
- jpeg_create_compress(&cinfo);
-
- /* Step 2: specify data destination (eg, a file) */
- /* Note: steps 2 and 3 can be done in either order. */
-
- /* Here we use the library-supplied code to send compressed data to a
- * stdio stream. You can also write your own code to do something else.
- * VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
- * requires it in order to write binary files.
- */
- if ((outfile = fopen(filename, "wb")) == NULL) {
- fprintf(stderr, "can't open %s\n", filename);
- exit(1);
- }
- jpeg_stdio_dest(&cinfo, outfile);
-
- /* Step 3: set parameters for compression */
-
- /* First we supply a description of the input image.
- * Four fields of the cinfo struct must be filled in:
- */
- cinfo.image_width = image_width; /* image width and height, in pixels */
- cinfo.image_height = image_height;
- cinfo.input_components = 3; /* # of color components per pixel */
- cinfo.in_color_space = JCS_RGB; /* colorspace of input image */
- /* Now use the library's routine to set default compression parameters.
- * (You must set at least cinfo.in_color_space before calling this,
- * since the defaults depend on the source color space.)
- */
- jpeg_set_defaults(&cinfo);
- /* Now you can set any non-default parameters you wish to.
- * Here we just illustrate the use of quality (quantization table) scaling:
- */
- jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);
-
- /* Step 4: Start compressor */
-
- /* TRUE ensures that we will write a complete interchange-JPEG file.
- * Pass TRUE unless you are very sure of what you're doing.
- */
- jpeg_start_compress(&cinfo, TRUE);
-
- /* Step 5: while (scan lines remain to be written) */
- /* jpeg_write_scanlines(...); */
-
- /* Here we use the library's state variable cinfo.next_scanline as the
- * loop counter, so that we don't have to keep track ourselves.
- * To keep things simple, we pass one scanline per call; you can pass
- * more if you wish, though.
- */
- row_stride = image_width * 3; /* JSAMPLEs per row in image_buffer */
-
- while (cinfo.next_scanline < cinfo.image_height) {
- /* jpeg_write_scanlines expects an array of pointers to scanlines.
- * Here the array is only one element long, but you could pass
- * more than one scanline at a time if that's more convenient.
- */
- row_pointer[0] = & image_buffer[cinfo.next_scanline * row_stride];
- (void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
- }
-
- /* Step 6: Finish compression */
-
- jpeg_finish_compress(&cinfo);
- /* After finish_compress, we can close the output file. */
- fclose(outfile);
-
- /* Step 7: release JPEG compression object */
-
- /* This is an important step since it will release a good deal of memory. */
- jpeg_destroy_compress(&cinfo);
-
- /* And we're done! */
-}
-
-
-/*
- * SOME FINE POINTS:
- *
- * In the above loop, we ignored the return value of jpeg_write_scanlines,
- * which is the number of scanlines actually written. We could get away
- * with this because we were only relying on the value of cinfo.next_scanline,
- * which will be incremented correctly. If you maintain additional loop
- * variables then you should be careful to increment them properly.
- * Actually, for output to a stdio stream you needn't worry, because
- * then jpeg_write_scanlines will write all the lines passed (or else exit
- * with a fatal error). Partial writes can only occur if you use a data
- * destination module that can demand suspension of the compressor.
- * (If you don't know what that's for, you don't need it.)
- *
- * If the compressor requires full-image buffers (for entropy-coding
- * optimization or a multi-scan JPEG file), it will create temporary
- * files for anything that doesn't fit within the maximum-memory setting.
- * (Note that temp files are NOT needed if you use the default parameters.)
- * On some systems you may need to set up a signal handler to ensure that
- * temporary files are deleted if the program is interrupted. See libjpeg.doc.
- *
- * Scanlines MUST be supplied in top-to-bottom order if you want your JPEG
- * files to be compatible with everyone else's. If you cannot readily read
- * your data in that order, you'll need an intermediate array to hold the
- * image. See rdtarga.c or rdbmp.c for examples of handling bottom-to-top
- * source data using the JPEG code's internal virtual-array mechanisms.
- */
-
-
-
-/******************** JPEG DECOMPRESSION SAMPLE INTERFACE *******************/
-
-/* This half of the example shows how to read data from the JPEG decompressor.
- * It's a bit more refined than the above, in that we show:
- * (a) how to modify the JPEG library's standard error-reporting behavior;
- * (b) how to allocate workspace using the library's memory manager.
- *
- * Just to make this example a little different from the first one, we'll
- * assume that we do not intend to put the whole image into an in-memory
- * buffer, but to send it line-by-line someplace else. We need a one-
- * scanline-high JSAMPLE array as a work buffer, and we will let the JPEG
- * memory manager allocate it for us. This approach is actually quite useful
- * because we don't need to remember to deallocate the buffer separately: it
- * will go away automatically when the JPEG object is cleaned up.
- */
-
-
-/*
- * ERROR HANDLING:
- *
- * The JPEG library's standard error handler (jerror.c) is divided into
- * several "methods" which you can override individually. This lets you
- * adjust the behavior without duplicating a lot of code, which you might
- * have to update with each future release.
- *
- * Our example here shows how to override the "error_exit" method so that
- * control is returned to the library's caller when a fatal error occurs,
- * rather than calling exit() as the standard error_exit method does.
- *
- * We use C's setjmp/longjmp facility to return control. This means that the
- * routine which calls the JPEG library must first execute a setjmp() call to
- * establish the return point. We want the replacement error_exit to do a
- * longjmp(). But we need to make the setjmp buffer accessible to the
- * error_exit routine. To do this, we make a private extension of the
- * standard JPEG error handler object. (If we were using C++, we'd say we
- * were making a subclass of the regular error handler.)
- *
- * Here's the extended error handler struct:
- */
-
-struct my_error_mgr {
- struct jpeg_error_mgr pub; /* "public" fields */
-
- jmp_buf setjmp_buffer; /* for return to caller */
-};
-
-typedef struct my_error_mgr * my_error_ptr;
-
-/*
- * Here's the routine that will replace the standard error_exit method:
- */
-
-METHODDEF(void)
-my_error_exit (j_common_ptr cinfo)
-{
- /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */
- my_error_ptr myerr = (my_error_ptr) cinfo->err;
-
- /* Always display the message. */
- /* We could postpone this until after returning, if we chose. */
- (*cinfo->err->output_message) (cinfo);
-
- /* Return control to the setjmp point */
- longjmp(myerr->setjmp_buffer, 1);
-}
-
-
-/*
- * Sample routine for JPEG decompression. We assume that the source file name
- * is passed in. We want to return 1 on success, 0 on error.
- */
-
-
-GLOBAL(int)
-read_JPEG_file (char * filename)
-{
- /* This struct contains the JPEG decompression parameters and pointers to
- * working space (which is allocated as needed by the JPEG library).
- */
- struct jpeg_decompress_struct cinfo;
- /* We use our private extension JPEG error handler.
- * Note that this struct must live as long as the main JPEG parameter
- * struct, to avoid dangling-pointer problems.
- */
- struct my_error_mgr jerr;
- /* More stuff */
- FILE * infile; /* source file */
- JSAMPARRAY buffer; /* Output row buffer */
- int row_stride; /* physical row width in output buffer */
-
- /* In this example we want to open the input file before doing anything else,
- * so that the setjmp() error recovery below can assume the file is open.
- * VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
- * requires it in order to read binary files.
- */
-
- if ((infile = fopen(filename, "rb")) == NULL) {
- fprintf(stderr, "can't open %s\n", filename);
- return 0;
- }
-
- /* Step 1: allocate and initialize JPEG decompression object */
-
- /* We set up the normal JPEG error routines, then override error_exit. */
- cinfo.err = jpeg_std_error(&jerr.pub);
- jerr.pub.error_exit = my_error_exit;
- /* Establish the setjmp return context for my_error_exit to use. */
- if (setjmp(jerr.setjmp_buffer)) {
- /* If we get here, the JPEG code has signaled an error.
- * We need to clean up the JPEG object, close the input file, and return.
- */
- jpeg_destroy_decompress(&cinfo);
- fclose(infile);
- return 0;
- }
- /* Now we can initialize the JPEG decompression object. */
- jpeg_create_decompress(&cinfo);
-
- /* Step 2: specify data source (eg, a file) */
-
- jpeg_stdio_src(&cinfo, infile);
-
- /* Step 3: read file parameters with jpeg_read_header() */
-
- (void) jpeg_read_header(&cinfo, TRUE);
- /* We can ignore the return value from jpeg_read_header since
- * (a) suspension is not possible with the stdio data source, and
- * (b) we passed TRUE to reject a tables-only JPEG file as an error.
- * See libjpeg.doc for more info.
- */
-
- /* Step 4: set parameters for decompression */
-
- /* In this example, we don't need to change any of the defaults set by
- * jpeg_read_header(), so we do nothing here.
- */
-
- /* Step 5: Start decompressor */
-
- (void) jpeg_start_decompress(&cinfo);
- /* We can ignore the return value since suspension is not possible
- * with the stdio data source.
- */
-
- /* We may need to do some setup of our own at this point before reading
- * the data. After jpeg_start_decompress() we have the correct scaled
- * output image dimensions available, as well as the output colormap
- * if we asked for color quantization.
- * In this example, we need to make an output work buffer of the right size.
- */
- /* JSAMPLEs per row in output buffer */
- row_stride = cinfo.output_width * cinfo.output_components;
- /* Make a one-row-high sample array that will go away when done with image */
- buffer = (*cinfo.mem->alloc_sarray)
- ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
-
- /* Step 6: while (scan lines remain to be read) */
- /* jpeg_read_scanlines(...); */
-
- /* Here we use the library's state variable cinfo.output_scanline as the
- * loop counter, so that we don't have to keep track ourselves.
- */
- while (cinfo.output_scanline < cinfo.output_height) {
- /* jpeg_read_scanlines expects an array of pointers to scanlines.
- * Here the array is only one element long, but you could ask for
- * more than one scanline at a time if that's more convenient.
- */
- (void) jpeg_read_scanlines(&cinfo, buffer, 1);
- /* Assume put_scanline_someplace wants a pointer and sample count. */
- put_scanline_someplace(buffer[0], row_stride);
- }
-
- /* Step 7: Finish decompression */
-
- (void) jpeg_finish_decompress(&cinfo);
- /* We can ignore the return value since suspension is not possible
- * with the stdio data source.
- */
-
- /* Step 8: Release JPEG decompression object */
-
- /* This is an important step since it will release a good deal of memory. */
- jpeg_destroy_decompress(&cinfo);
-
- /* After finish_decompress, we can close the input file.
- * Here we postpone it until after no more JPEG errors are possible,
- * so as to simplify the setjmp error logic above. (Actually, I don't
- * think that jpeg_destroy can do an error exit, but why assume anything...)
- */
- fclose(infile);
-
- /* At this point you may want to check to see whether any corrupt-data
- * warnings occurred (test whether jerr.pub.num_warnings is nonzero).
- */
-
- /* And we're done! */
- return 1;
-}
-
-
-/*
- * SOME FINE POINTS:
- *
- * In the above code, we ignored the return value of jpeg_read_scanlines,
- * which is the number of scanlines actually read. We could get away with
- * this because we asked for only one line at a time and we weren't using
- * a suspending data source. See libjpeg.doc for more info.
- *
- * We cheated a bit by calling alloc_sarray() after jpeg_start_decompress();
- * we should have done it beforehand to ensure that the space would be
- * counted against the JPEG max_memory setting. In some systems the above
- * code would risk an out-of-memory error. However, in general we don't
- * know the output image dimensions before jpeg_start_decompress(), unless we
- * call jpeg_calc_output_dimensions(). See libjpeg.doc for more about this.
- *
- * Scanlines are returned in the same order as they appear in the JPEG file,
- * which is standardly top-to-bottom. If you must emit data bottom-to-top,
- * you can use one of the virtual arrays provided by the JPEG memory manager
- * to invert the data. See wrbmp.c for an example.
- *
- * As with compression, some operating modes may require temporary files.
- * On some systems you may need to set up a signal handler to ensure that
- * temporary files are deleted if the program is interrupted. See libjpeg.doc.
- */
+++ /dev/null
-IJG JPEG LIBRARY: FILE LIST
-
-Copyright (C) 1994-1998, Thomas G. Lane.
-This file is part of the Independent JPEG Group's software.
-For conditions of distribution and use, see the accompanying README file.
-
-
-Here is a road map to the files in the IJG JPEG distribution. The
-distribution includes the JPEG library proper, plus two application
-programs ("cjpeg" and "djpeg") which use the library to convert JPEG
-files to and from some other popular image formats. A third application
-"jpegtran" uses the library to do lossless conversion between different
-variants of JPEG. There are also two stand-alone applications,
-"rdjpgcom" and "wrjpgcom".
-
-
-THE JPEG LIBRARY
-================
-
-Include files:
-
-jpeglib.h JPEG library's exported data and function declarations.
-jconfig.h Configuration declarations. Note: this file is not present
- in the distribution; it is generated during installation.
-jmorecfg.h Additional configuration declarations; need not be changed
- for a standard installation.
-jerror.h Declares JPEG library's error and trace message codes.
-jinclude.h Central include file used by all IJG .c files to reference
- system include files.
-jpegint.h JPEG library's internal data structures.
-jchuff.h Private declarations for Huffman encoder modules.
-jdhuff.h Private declarations for Huffman decoder modules.
-jdct.h Private declarations for forward & reverse DCT subsystems.
-jmemsys.h Private declarations for memory management subsystem.
-jversion.h Version information.
-
-Applications using the library should include jpeglib.h (which in turn
-includes jconfig.h and jmorecfg.h). Optionally, jerror.h may be included
-if the application needs to reference individual JPEG error codes. The
-other include files are intended for internal use and would not normally
-be included by an application program. (cjpeg/djpeg/etc do use jinclude.h,
-since its function is to improve portability of the whole IJG distribution.
-Most other applications will directly include the system include files they
-want, and hence won't need jinclude.h.)
-
-
-C source code files:
-
-These files contain most of the functions intended to be called directly by
-an application program:
-
-jcapimin.c Application program interface: core routines for compression.
-jcapistd.c Application program interface: standard compression.
-jdapimin.c Application program interface: core routines for decompression.
-jdapistd.c Application program interface: standard decompression.
-jcomapi.c Application program interface routines common to compression
- and decompression.
-jcparam.c Compression parameter setting helper routines.
-jctrans.c API and library routines for transcoding compression.
-jdtrans.c API and library routines for transcoding decompression.
-
-Compression side of the library:
-
-jcinit.c Initialization: determines which other modules to use.
-jcmaster.c Master control: setup and inter-pass sequencing logic.
-jcmainct.c Main buffer controller (preprocessor => JPEG compressor).
-jcprepct.c Preprocessor buffer controller.
-jccoefct.c Buffer controller for DCT coefficient buffer.
-jccolor.c Color space conversion.
-jcsample.c Downsampling.
-jcdctmgr.c DCT manager (DCT implementation selection & control).
-jfdctint.c Forward DCT using slow-but-accurate integer method.
-jfdctfst.c Forward DCT using faster, less accurate integer method.
-jfdctflt.c Forward DCT using floating-point arithmetic.
-jchuff.c Huffman entropy coding for sequential JPEG.
-jcphuff.c Huffman entropy coding for progressive JPEG.
-jcmarker.c JPEG marker writing.
-jdatadst.c Data destination manager for stdio output.
-
-Decompression side of the library:
-
-jdmaster.c Master control: determines which other modules to use.
-jdinput.c Input controller: controls input processing modules.
-jdmainct.c Main buffer controller (JPEG decompressor => postprocessor).
-jdcoefct.c Buffer controller for DCT coefficient buffer.
-jdpostct.c Postprocessor buffer controller.
-jdmarker.c JPEG marker reading.
-jdhuff.c Huffman entropy decoding for sequential JPEG.
-jdphuff.c Huffman entropy decoding for progressive JPEG.
-jddctmgr.c IDCT manager (IDCT implementation selection & control).
-jidctint.c Inverse DCT using slow-but-accurate integer method.
-jidctfst.c Inverse DCT using faster, less accurate integer method.
-jidctflt.c Inverse DCT using floating-point arithmetic.
-jidctred.c Inverse DCTs with reduced-size outputs.
-jdsample.c Upsampling.
-jdcolor.c Color space conversion.
-jdmerge.c Merged upsampling/color conversion (faster, lower quality).
-jquant1.c One-pass color quantization using a fixed-spacing colormap.
-jquant2.c Two-pass color quantization using a custom-generated colormap.
- Also handles one-pass quantization to an externally given map.
-jdatasrc.c Data source manager for stdio input.
-
-Support files for both compression and decompression:
-
-jerror.c Standard error handling routines (application replaceable).
-jmemmgr.c System-independent (more or less) memory management code.
-jutils.c Miscellaneous utility routines.
-
-jmemmgr.c relies on a system-dependent memory management module. The IJG
-distribution includes the following implementations of the system-dependent
-module:
-
-jmemnobs.c "No backing store": assumes adequate virtual memory exists.
-jmemansi.c Makes temporary files with ANSI-standard routine tmpfile().
-jmemname.c Makes temporary files with program-generated file names.
-jmemdos.c Custom implementation for MS-DOS (16-bit environment only):
- can use extended and expanded memory as well as temp files.
-jmemmac.c Custom implementation for Apple Macintosh.
-
-Exactly one of the system-dependent modules should be configured into an
-installed JPEG library (see install.doc for hints about which one to use).
-On unusual systems you may find it worthwhile to make a special
-system-dependent memory manager.
-
-
-Non-C source code files:
-
-jmemdosa.asm 80x86 assembly code support for jmemdos.c; used only in
- MS-DOS-specific configurations of the JPEG library.
-
-
-CJPEG/DJPEG/JPEGTRAN
-====================
-
-Include files:
-
-cdjpeg.h Declarations shared by cjpeg/djpeg/jpegtran modules.
-cderror.h Additional error and trace message codes for cjpeg et al.
-transupp.h Declarations for jpegtran support routines in transupp.c.
-
-C source code files:
-
-cjpeg.c Main program for cjpeg.
-djpeg.c Main program for djpeg.
-jpegtran.c Main program for jpegtran.
-cdjpeg.c Utility routines used by all three programs.
-rdcolmap.c Code to read a colormap file for djpeg's "-map" switch.
-rdswitch.c Code to process some of cjpeg's more complex switches.
- Also used by jpegtran.
-transupp.c Support code for jpegtran: lossless image manipulations.
-
-Image file reader modules for cjpeg:
-
-rdbmp.c BMP file input.
-rdgif.c GIF file input (now just a stub).
-rdppm.c PPM/PGM file input.
-rdrle.c Utah RLE file input.
-rdtarga.c Targa file input.
-
-Image file writer modules for djpeg:
-
-wrbmp.c BMP file output.
-wrgif.c GIF file output (a mere shadow of its former self).
-wrppm.c PPM/PGM file output.
-wrrle.c Utah RLE file output.
-wrtarga.c Targa file output.
-
-
-RDJPGCOM/WRJPGCOM
-=================
-
-C source code files:
-
-rdjpgcom.c Stand-alone rdjpgcom application.
-wrjpgcom.c Stand-alone wrjpgcom application.
-
-These programs do not depend on the IJG library. They do use
-jconfig.h and jinclude.h, only to improve portability.
-
-
-ADDITIONAL FILES
-================
-
-Documentation (see README for a guide to the documentation files):
-
-README Master documentation file.
-*.doc Other documentation files.
-*.1 Documentation in Unix man page format.
-change.log Version-to-version change highlights.
-example.c Sample code for calling JPEG library.
-
-Configuration/installation files and programs (see install.doc for more info):
-
-configure Unix shell script to perform automatic configuration.
-ltconfig Support scripts for configure (from GNU libtool).
-ltmain.sh
-config.guess
-config.sub
-install-sh Install shell script for those Unix systems lacking one.
-ckconfig.c Program to generate jconfig.h on non-Unix systems.
-jconfig.doc Template for making jconfig.h by hand.
-makefile.* Sample makefiles for particular systems.
-jconfig.* Sample jconfig.h for particular systems.
-ansi2knr.c De-ANSIfier for pre-ANSI C compilers (courtesy of
- L. Peter Deutsch and Aladdin Enterprises).
-
-Test files (see install.doc for test procedure):
-
-test*.* Source and comparison files for confidence test.
- These are binary image files, NOT text files.
+++ /dev/null
-INSTALLATION INSTRUCTIONS for the Independent JPEG Group's JPEG software
-
-Copyright (C) 1991-1998, Thomas G. Lane.
-This file is part of the Independent JPEG Group's software.
-For conditions of distribution and use, see the accompanying README file.
-
-
-This file explains how to configure and install the IJG software. We have
-tried to make this software extremely portable and flexible, so that it can be
-adapted to almost any environment. The downside of this decision is that the
-installation process is complicated. We have provided shortcuts to simplify
-the task on common systems. But in any case, you will need at least a little
-familiarity with C programming and program build procedures for your system.
-
-If you are only using this software as part of a larger program, the larger
-program's installation procedure may take care of configuring the IJG code.
-For example, Ghostscript's installation script will configure the IJG code.
-You don't need to read this file if you just want to compile Ghostscript.
-
-If you are on a Unix machine, you may not need to read this file at all.
-Try doing
- ./configure
- make
- make test
-If that doesn't complain, do
- make install
-(better do "make -n install" first to see if the makefile will put the files
-where you want them). Read further if you run into snags or want to customize
-the code for your system.
-
-
-TABLE OF CONTENTS
------------------
-
-Before you start
-Configuring the software:
- using the automatic "configure" script
- using one of the supplied jconfig and makefile files
- by hand
-Building the software
-Testing the software
-Installing the software
-Optional stuff
-Optimization
-Hints for specific systems
-
-
-BEFORE YOU START
-================
-
-Before installing the software you must unpack the distributed source code.
-Since you are reading this file, you have probably already succeeded in this
-task. However, there is a potential for error if you needed to convert the
-files to the local standard text file format (for example, if you are on
-MS-DOS you may have converted LF end-of-line to CR/LF). You must apply
-such conversion to all the files EXCEPT those whose names begin with "test".
-The test files contain binary data; if you change them in any way then the
-self-test will give bad results.
-
-Please check the last section of this file to see if there are hints for the
-specific machine or compiler you are using.
-
-
-CONFIGURING THE SOFTWARE
-========================
-
-To configure the IJG code for your system, you need to create two files:
- * jconfig.h: contains values for system-dependent #define symbols.
- * Makefile: controls the compilation process.
-(On a non-Unix machine, you may create "project files" or some other
-substitute for a Makefile. jconfig.h is needed in any environment.)
-
-We provide three different ways to generate these files:
- * On a Unix system, you can just run the "configure" script.
- * We provide sample jconfig files and makefiles for popular machines;
- if your machine matches one of the samples, just copy the right sample
- files to jconfig.h and Makefile.
- * If all else fails, read the instructions below and make your own files.
-
-
-Configuring the software using the automatic "configure" script
----------------------------------------------------------------
-
-If you are on a Unix machine, you can just type
- ./configure
-and let the configure script construct appropriate configuration files.
-If you're using "csh" on an old version of System V, you might need to type
- sh configure
-instead to prevent csh from trying to execute configure itself.
-Expect configure to run for a few minutes, particularly on slower machines;
-it works by compiling a series of test programs.
-
-Configure was created with GNU Autoconf and it follows the usual conventions
-for GNU configure scripts. It makes a few assumptions that you may want to
-override. You can do this by providing optional switches to configure:
-
-* If you want to build libjpeg as a shared library, say
- ./configure --enable-shared
-To get both shared and static libraries, say
- ./configure --enable-shared --enable-static
-Note that these switches invoke GNU libtool to take care of system-dependent
-shared library building methods. If things don't work this way, please try
-running configure without either switch; that should build a static library
-without using libtool. If that works, your problem is probably with libtool
-not with the IJG code. libtool is fairly new and doesn't support all flavors
-of Unix yet. (You might be able to find a newer version of libtool than the
-one included with libjpeg; see ftp.gnu.org. Report libtool problems to
-bug-libtool@gnu.org.)
-
-* Configure will use gcc (GNU C compiler) if it's available, otherwise cc.
-To force a particular compiler to be selected, use the CC option, for example
- ./configure CC='cc'
-The same method can be used to include any unusual compiler switches.
-For example, on HP-UX you probably want to say
- ./configure CC='cc -Aa'
-to get HP's compiler to run in ANSI mode.
-
-* The default CFLAGS setting is "-O" for non-gcc compilers, "-O2" for gcc.
-You can override this by saying, for example,
- ./configure CFLAGS='-g'
-if you want to compile with debugging support.
-
-* Configure will set up the makefile so that "make install" will install files
-into /usr/local/bin, /usr/local/man, etc. You can specify an installation
-prefix other than "/usr/local" by giving configure the option "--prefix=PATH".
-
-* If you don't have a lot of swap space, you may need to enable the IJG
-software's internal virtual memory mechanism. To do this, give the option
-"--enable-maxmem=N" where N is the default maxmemory limit in megabytes.
-This is discussed in more detail under "Selecting a memory manager", below.
-You probably don't need to worry about this on reasonably-sized Unix machines,
-unless you plan to process very large images.
-
-Configure has some other features that are useful if you are cross-compiling
-or working in a network of multiple machine types; but if you need those
-features, you probably already know how to use them.
-
-
-Configuring the software using one of the supplied jconfig and makefile files
------------------------------------------------------------------------------
-
-If you have one of these systems, you can just use the provided configuration
-files:
-
-Makefile jconfig file System and/or compiler
-
-makefile.manx jconfig.manx Amiga, Manx Aztec C
-makefile.sas jconfig.sas Amiga, SAS C
-makeproj.mac jconfig.mac Apple Macintosh, Metrowerks CodeWarrior
-mak*jpeg.st jconfig.st Atari ST/STE/TT, Pure C or Turbo C
-makefile.bcc jconfig.bcc MS-DOS or OS/2, Borland C
-makefile.dj jconfig.dj MS-DOS, DJGPP (Delorie's port of GNU C)
-makefile.mc6 jconfig.mc6 MS-DOS, Microsoft C (16-bit only)
-makefile.wat jconfig.wat MS-DOS, OS/2, or Windows NT, Watcom C
-makefile.vc jconfig.vc Windows NT/95, MS Visual C++
-make*.ds jconfig.vc Windows NT/95, MS Developer Studio
-makefile.mms jconfig.vms Digital VMS, with MMS software
-makefile.vms jconfig.vms Digital VMS, without MMS software
-
-Copy the proper jconfig file to jconfig.h and the makefile to Makefile (or
-whatever your system uses as the standard makefile name). For more info see
-the appropriate system-specific hints section near the end of this file.
-
-
-Configuring the software by hand
---------------------------------
-
-First, generate a jconfig.h file. If you are moderately familiar with C,
-the comments in jconfig.doc should be enough information to do this; just
-copy jconfig.doc to jconfig.h and edit it appropriately. Otherwise, you may
-prefer to use the ckconfig.c program. You will need to compile and execute
-ckconfig.c by hand --- we hope you know at least enough to do that.
-ckconfig.c may not compile the first try (in fact, the whole idea is for it
-to fail if anything is going to). If you get compile errors, fix them by
-editing ckconfig.c according to the directions given in ckconfig.c. Once
-you get it to run, it will write a suitable jconfig.h file, and will also
-print out some advice about which makefile to use.
-
-You may also want to look at the canned jconfig files, if there is one for a
-system similar to yours.
-
-Second, select a makefile and copy it to Makefile (or whatever your system
-uses as the standard makefile name). The most generic makefiles we provide
-are
- makefile.ansi: if your C compiler supports function prototypes
- makefile.unix: if not.
-(You have function prototypes if ckconfig.c put "#define HAVE_PROTOTYPES"
-in jconfig.h.) You may want to start from one of the other makefiles if
-there is one for a system similar to yours.
-
-Look over the selected Makefile and adjust options as needed. In particular
-you may want to change the CC and CFLAGS definitions. For instance, if you
-are using GCC, set CC=gcc. If you had to use any compiler switches to get
-ckconfig.c to work, make sure the same switches are in CFLAGS.
-
-If you are on a system that doesn't use makefiles, you'll need to set up
-project files (or whatever you do use) to compile all the source files and
-link them into executable files cjpeg, djpeg, jpegtran, rdjpgcom, and wrjpgcom.
-See the file lists in any of the makefiles to find out which files go into
-each program. Note that the provided makefiles all make a "library" file
-libjpeg first, but you don't have to do that if you don't want to; the file
-lists identify which source files are actually needed for compression,
-decompression, or both. As a last resort, you can make a batch script that
-just compiles everything and links it all together; makefile.vms is an example
-of this (it's for VMS systems that have no make-like utility).
-
-Here are comments about some specific configuration decisions you'll
-need to make:
-
-Command line style
-------------------
-
-These programs can use a Unix-like command line style which supports
-redirection and piping, like this:
- cjpeg inputfile >outputfile
- cjpeg <inputfile >outputfile
- source program | cjpeg >outputfile
-The simpler "two file" command line style is just
- cjpeg inputfile outputfile
-You may prefer the two-file style, particularly if you don't have pipes.
-
-You MUST use two-file style on any system that doesn't cope well with binary
-data fed through stdin/stdout; this is true for some MS-DOS compilers, for
-example. If you're not on a Unix system, it's safest to assume you need
-two-file style. (But if your compiler provides either the Posix-standard
-fdopen() library routine or a Microsoft-compatible setmode() routine, you
-can safely use the Unix command line style, by defining USE_FDOPEN or
-USE_SETMODE respectively.)
-
-To use the two-file style, make jconfig.h say "#define TWO_FILE_COMMANDLINE".
-
-Selecting a memory manager
---------------------------
-
-The IJG code is capable of working on images that are too big to fit in main
-memory; data is swapped out to temporary files as necessary. However, the
-code to do this is rather system-dependent. We provide five different
-memory managers:
-
-* jmemansi.c This version uses the ANSI-standard library routine tmpfile(),
- which not all non-ANSI systems have. On some systems
- tmpfile() may put the temporary file in a non-optimal
- location; if you don't like what it does, use jmemname.c.
-
-* jmemname.c This version creates named temporary files. For anything
- except a Unix machine, you'll need to configure the
- select_file_name() routine appropriately; see the comments
- near the head of jmemname.c. If you use this version, define
- NEED_SIGNAL_CATCHER in jconfig.h to make sure the temp files
- are removed if the program is aborted.
-
-* jmemnobs.c (That stands for No Backing Store :-).) This will compile on
- almost any system, but it assumes you have enough main memory
- or virtual memory to hold the biggest images you work with.
-
-* jmemdos.c This should be used with most 16-bit MS-DOS compilers.
- See the system-specific notes about MS-DOS for more info.
- IMPORTANT: if you use this, define USE_MSDOS_MEMMGR in
- jconfig.h, and include the assembly file jmemdosa.asm in the
- programs. The supplied makefiles and jconfig files for
- 16-bit MS-DOS compilers already do both.
-
-* jmemmac.c Custom version for Apple Macintosh; see the system-specific
- notes for Macintosh for more info.
-
-To use a particular memory manager, change the SYSDEPMEM variable in your
-makefile to equal the corresponding object file name (for example, jmemansi.o
-or jmemansi.obj for jmemansi.c).
-
-If you have plenty of (real or virtual) main memory, just use jmemnobs.c.
-"Plenty" means about ten bytes for every pixel in the largest images
-you plan to process, so a lot of systems don't meet this criterion.
-If yours doesn't, try jmemansi.c first. If that doesn't compile, you'll have
-to use jmemname.c; be sure to adjust select_file_name() for local conditions.
-You may also need to change unlink() to remove() in close_backing_store().
-
-Except with jmemnobs.c or jmemmac.c, you need to adjust the DEFAULT_MAX_MEM
-setting to a reasonable value for your system (either by adding a #define for
-DEFAULT_MAX_MEM to jconfig.h, or by adding a -D switch to the Makefile).
-This value limits the amount of data space the program will attempt to
-allocate. Code and static data space isn't counted, so the actual memory
-needs for cjpeg or djpeg are typically 100 to 150Kb more than the max-memory
-setting. Larger max-memory settings reduce the amount of I/O needed to
-process a large image, but too large a value can result in "insufficient
-memory" failures. On most Unix machines (and other systems with virtual
-memory), just set DEFAULT_MAX_MEM to several million and forget it. At the
-other end of the spectrum, for MS-DOS machines you probably can't go much
-above 300K to 400K. (On MS-DOS the value refers to conventional memory only.
-Extended/expanded memory is handled separately by jmemdos.c.)
-
-
-BUILDING THE SOFTWARE
-=====================
-
-Now you should be able to compile the software. Just say "make" (or
-whatever's necessary to start the compilation). Have a cup of coffee.
-
-Here are some things that could go wrong:
-
-If your compiler complains about undefined structures, you should be able to
-shut it up by putting "#define INCOMPLETE_TYPES_BROKEN" in jconfig.h.
-
-If you have trouble with missing system include files or inclusion of the
-wrong ones, read jinclude.h. This shouldn't happen if you used configure
-or ckconfig.c to set up jconfig.h.
-
-There are a fair number of routines that do not use all of their parameters;
-some compilers will issue warnings about this, which you can ignore. There
-are also a few configuration checks that may give "unreachable code" warnings.
-Any other warning deserves investigation.
-
-If you don't have a getenv() library routine, define NO_GETENV.
-
-Also see the system-specific hints, below.
-
-
-TESTING THE SOFTWARE
-====================
-
-As a quick test of functionality we've included a small sample image in
-several forms:
- testorig.jpg Starting point for the djpeg tests.
- testimg.ppm The output of djpeg testorig.jpg
- testimg.bmp The output of djpeg -bmp -colors 256 testorig.jpg
- testimg.jpg The output of cjpeg testimg.ppm
- testprog.jpg Progressive-mode equivalent of testorig.jpg.
- testimgp.jpg The output of cjpeg -progressive -optimize testimg.ppm
-(The first- and second-generation .jpg files aren't identical since JPEG is
-lossy.) If you can generate duplicates of the testimg* files then you
-probably have working programs.
-
-With most of the makefiles, "make test" will perform the necessary
-comparisons.
-
-If you're using a makefile that doesn't provide the test option, run djpeg
-and cjpeg by hand and compare the output files to testimg* with whatever
-binary file comparison tool you have. The files should be bit-for-bit
-identical.
-
-If the programs complain "MAX_ALLOC_CHUNK is wrong, please fix", then you
-need to reduce MAX_ALLOC_CHUNK to a value that fits in type size_t.
-Try adding "#define MAX_ALLOC_CHUNK 65520L" to jconfig.h. A less likely
-configuration error is "ALIGN_TYPE is wrong, please fix": defining ALIGN_TYPE
-as long should take care of that one.
-
-If the cjpeg test run fails with "Missing Huffman code table entry", it's a
-good bet that you needed to define RIGHT_SHIFT_IS_UNSIGNED. Go back to the
-configuration step and run ckconfig.c. (This is a good plan for any other
-test failure, too.)
-
-If you are using Unix (one-file) command line style on a non-Unix system,
-it's a good idea to check that binary I/O through stdin/stdout actually
-works. You should get the same results from "djpeg <testorig.jpg >out.ppm"
-as from "djpeg -outfile out.ppm testorig.jpg". Note that the makefiles all
-use the latter style and therefore do not exercise stdin/stdout! If this
-check fails, try recompiling with USE_SETMODE or USE_FDOPEN defined.
-If it still doesn't work, better use two-file style.
-
-If you chose a memory manager other than jmemnobs.c, you should test that
-temporary-file usage works. Try "djpeg -bmp -colors 256 -max 0 testorig.jpg"
-and make sure its output matches testimg.bmp. If you have any really large
-images handy, try compressing them with -optimize and/or decompressing with
--colors 256 to make sure your DEFAULT_MAX_MEM setting is not too large.
-
-NOTE: this is far from an exhaustive test of the JPEG software; some modules,
-such as 1-pass color quantization, are not exercised at all. It's just a
-quick test to give you some confidence that you haven't missed something
-major.
-
-
-INSTALLING THE SOFTWARE
-=======================
-
-Once you're done with the above steps, you can install the software by
-copying the executable files (cjpeg, djpeg, jpegtran, rdjpgcom, and wrjpgcom)
-to wherever you normally install programs. On Unix systems, you'll also want
-to put the man pages (cjpeg.1, djpeg.1, jpegtran.1, rdjpgcom.1, wrjpgcom.1)
-in the man-page directory. The pre-fab makefiles don't support this step
-since there's such a wide variety of installation procedures on different
-systems.
-
-If you generated a Makefile with the "configure" script, you can just say
- make install
-to install the programs and their man pages into the standard places.
-(You'll probably need to be root to do this.) We recommend first saying
- make -n install
-to see where configure thought the files should go. You may need to edit
-the Makefile, particularly if your system's conventions for man page
-filenames don't match what configure expects.
-
-If you want to install the IJG library itself, for use in compiling other
-programs besides ours, then you need to put the four include files
- jpeglib.h jerror.h jconfig.h jmorecfg.h
-into your include-file directory, and put the library file libjpeg.a
-(extension may vary depending on system) wherever library files go.
-If you generated a Makefile with "configure", it will do what it thinks
-is the right thing if you say
- make install-lib
-
-
-OPTIONAL STUFF
-==============
-
-Progress monitor:
-
-If you like, you can #define PROGRESS_REPORT (in jconfig.h) to enable display
-of percent-done progress reports. The routine provided in cdjpeg.c merely
-prints percentages to stderr, but you can customize it to do something
-fancier.
-
-Utah RLE file format support:
-
-We distribute the software with support for RLE image files (Utah Raster
-Toolkit format) disabled, because the RLE support won't compile without the
-Utah library. If you have URT version 3.1 or later, you can enable RLE
-support as follows:
- 1. #define RLE_SUPPORTED in jconfig.h.
- 2. Add a -I option to CFLAGS in the Makefile for the directory
- containing the URT .h files (typically the "include"
- subdirectory of the URT distribution).
- 3. Add -L... -lrle to LDLIBS in the Makefile, where ... specifies
- the directory containing the URT "librle.a" file (typically the
- "lib" subdirectory of the URT distribution).
-
-Support for 12-bit-deep pixel data:
-
-The JPEG standard allows either 8-bit or 12-bit data precision. (For color,
-this means 8 or 12 bits per channel, of course.) If you need to work with
-deeper than 8-bit data, you can compile the IJG code for 12-bit operation.
-To do so:
- 1. In jmorecfg.h, define BITS_IN_JSAMPLE as 12 rather than 8.
- 2. In jconfig.h, undefine BMP_SUPPORTED, RLE_SUPPORTED, and TARGA_SUPPORTED,
- because the code for those formats doesn't handle 12-bit data and won't
- even compile. (The PPM code does work, as explained below. The GIF
- code works too; it scales 8-bit GIF data to and from 12-bit depth
- automatically.)
- 3. Compile. Don't expect "make test" to pass, since the supplied test
- files are for 8-bit data.
-
-Currently, 12-bit support does not work on 16-bit-int machines.
-
-Note that a 12-bit version will not read 8-bit JPEG files, nor vice versa;
-so you'll want to keep around a regular 8-bit compilation as well.
-(Run-time selection of data depth, to allow a single copy that does both,
-is possible but would probably slow things down considerably; it's very low
-on our to-do list.)
-
-The PPM reader (rdppm.c) can read 12-bit data from either text-format or
-binary-format PPM and PGM files. Binary-format PPM/PGM files which have a
-maxval greater than 255 are assumed to use 2 bytes per sample, LSB first
-(little-endian order). As of early 1995, 2-byte binary format is not
-officially supported by the PBMPLUS library, but it is expected that a
-future release of PBMPLUS will support it. Note that the PPM reader will
-read files of any maxval regardless of the BITS_IN_JSAMPLE setting; incoming
-data is automatically rescaled to either maxval=255 or maxval=4095 as
-appropriate for the cjpeg bit depth.
-
-The PPM writer (wrppm.c) will normally write 2-byte binary PPM or PGM
-format, maxval 4095, when compiled with BITS_IN_JSAMPLE=12. Since this
-format is not yet widely supported, you can disable it by compiling wrppm.c
-with PPM_NORAWWORD defined; then the data is scaled down to 8 bits to make a
-standard 1-byte/sample PPM or PGM file. (Yes, this means still another copy
-of djpeg to keep around. But hopefully you won't need it for very long.
-Poskanzer's supposed to get that new PBMPLUS release out Real Soon Now.)
-
-Of course, if you are working with 12-bit data, you probably have it stored
-in some other, nonstandard format. In that case you'll probably want to
-write your own I/O modules to read and write your format.
-
-Note that a 12-bit version of cjpeg always runs in "-optimize" mode, in
-order to generate valid Huffman tables. This is necessary because our
-default Huffman tables only cover 8-bit data.
-
-Removing code:
-
-If you need to make a smaller version of the JPEG software, some optional
-functions can be removed at compile time. See the xxx_SUPPORTED #defines in
-jconfig.h and jmorecfg.h. If at all possible, we recommend that you leave in
-decoder support for all valid JPEG files, to ensure that you can read anyone's
-output. Taking out support for image file formats that you don't use is the
-most painless way to make the programs smaller. Another possibility is to
-remove some of the DCT methods: in particular, the "IFAST" method may not be
-enough faster than the others to be worth keeping on your machine. (If you
-do remove ISLOW or IFAST, be sure to redefine JDCT_DEFAULT or JDCT_FASTEST
-to a supported method, by adding a #define in jconfig.h.)
-
-
-OPTIMIZATION
-============
-
-Unless you own a Cray, you'll probably be interested in making the JPEG
-software go as fast as possible. This section covers some machine-dependent
-optimizations you may want to try. We suggest that before trying any of
-this, you first get the basic installation to pass the self-test step.
-Repeat the self-test after any optimization to make sure that you haven't
-broken anything.
-
-The integer DCT routines perform a lot of multiplications. These
-multiplications must yield 32-bit results, but none of their input values
-are more than 16 bits wide. On many machines, notably the 680x0 and 80x86
-CPUs, a 16x16=>32 bit multiply instruction is faster than a full 32x32=>32
-bit multiply. Unfortunately there is no portable way to specify such a
-multiplication in C, but some compilers can generate one when you use the
-right combination of casts. See the MULTIPLYxxx macro definitions in
-jdct.h. If your compiler makes "int" be 32 bits and "short" be 16 bits,
-defining SHORTxSHORT_32 is fairly likely to work. When experimenting with
-alternate definitions, be sure to test not only whether the code still works
-(use the self-test), but also whether it is actually faster --- on some
-compilers, alternate definitions may compute the right answer, yet be slower
-than the default. Timing cjpeg on a large PGM (grayscale) input file is the
-best way to check this, as the DCT will be the largest fraction of the runtime
-in that mode. (Note: some of the distributed compiler-specific jconfig files
-already contain #define switches to select appropriate MULTIPLYxxx
-definitions.)
-
-If your machine has sufficiently fast floating point hardware, you may find
-that the float DCT method is faster than the integer DCT methods, even
-after tweaking the integer multiply macros. In that case you may want to
-make the float DCT be the default method. (The only objection to this is
-that float DCT results may vary slightly across machines.) To do that, add
-"#define JDCT_DEFAULT JDCT_FLOAT" to jconfig.h. Even if you don't change
-the default, you should redefine JDCT_FASTEST, which is the method selected
-by djpeg's -fast switch. Don't forget to update the documentation files
-(usage.doc and/or cjpeg.1, djpeg.1) to agree with what you've done.
-
-If access to "short" arrays is slow on your machine, it may be a win to
-define type JCOEF as int rather than short. This will cost a good deal of
-memory though, particularly in some multi-pass modes, so don't do it unless
-you have memory to burn and short is REALLY slow.
-
-If your compiler can compile function calls in-line, make sure the INLINE
-macro in jmorecfg.h is defined as the keyword that marks a function
-inline-able. Some compilers have a switch that tells the compiler to inline
-any function it thinks is profitable (e.g., -finline-functions for gcc).
-Enabling such a switch is likely to make the compiled code bigger but faster.
-
-In general, it's worth trying the maximum optimization level of your compiler,
-and experimenting with any optional optimizations such as loop unrolling.
-(Unfortunately, far too many compilers have optimizer bugs ... be prepared to
-back off if the code fails self-test.) If you do any experimentation along
-these lines, please report the optimal settings to jpeg-info@uunet.uu.net so
-we can mention them in future releases. Be sure to specify your machine and
-compiler version.
-
-
-HINTS FOR SPECIFIC SYSTEMS
-==========================
-
-We welcome reports on changes needed for systems not mentioned here. Submit
-'em to jpeg-info@uunet.uu.net. Also, if configure or ckconfig.c is wrong
-about how to configure the JPEG software for your system, please let us know.
-
-
-Acorn RISC OS:
-
-(Thanks to Simon Middleton for these hints on compiling with Desktop C.)
-After renaming the files according to Acorn conventions, take a copy of
-makefile.ansi, change all occurrences of 'libjpeg.a' to 'libjpeg.o' and
-change these definitions as indicated:
-
-CFLAGS= -throwback -IC: -Wn
-LDLIBS=C:o.Stubs
-SYSDEPMEM=jmemansi.o
-LN=Link
-AR=LibFile -c -o
-
-Also add a new line '.c.o:; $(cc) $< $(cflags) -c -o $@'. Remove the
-lines '$(RM) libjpeg.o' and '$(AR2) libjpeg.o' and the 'jconfig.h'
-dependency section.
-
-Copy jconfig.doc to jconfig.h. Edit jconfig.h to define TWO_FILE_COMMANDLINE
-and CHAR_IS_UNSIGNED.
-
-Run the makefile using !AMU not !Make. If you want to use the 'clean' and
-'test' makefile entries then you will have to fiddle with the syntax a bit
-and rename the test files.
-
-
-Amiga:
-
-SAS C 6.50 reportedly is too buggy to compile the IJG code properly.
-A patch to update to 6.51 is available from SAS or AmiNet FTP sites.
-
-The supplied config files are set up to use jmemname.c as the memory
-manager, with temporary files being created on the device named by
-"JPEGTMP:".
-
-
-Atari ST/STE/TT:
-
-Copy the project files makcjpeg.st, makdjpeg.st, maktjpeg.st, and makljpeg.st
-to cjpeg.prj, djpeg.prj, jpegtran.prj, and libjpeg.prj respectively. The
-project files should work as-is with Pure C. For Turbo C, change library
-filenames "pc..." to "tc..." in each project file. Note that libjpeg.prj
-selects jmemansi.c as the recommended memory manager. You'll probably want to
-adjust the DEFAULT_MAX_MEM setting --- you want it to be a couple hundred K
-less than your normal free memory. Put "#define DEFAULT_MAX_MEM nnnn" into
-jconfig.h to do this.
-
-To use the 68881/68882 coprocessor for the floating point DCT, add the
-compiler option "-8" to the project files and replace pcfltlib.lib with
-pc881lib.lib in cjpeg.prj and djpeg.prj. Or if you don't have a
-coprocessor, you may prefer to remove the float DCT code by undefining
-DCT_FLOAT_SUPPORTED in jmorecfg.h (since without a coprocessor, the float
-code will be too slow to be useful). In that case, you can delete
-pcfltlib.lib from the project files.
-
-Note that you must make libjpeg.lib before making cjpeg.ttp, djpeg.ttp,
-or jpegtran.ttp. You'll have to perform the self-test by hand.
-
-We haven't bothered to include project files for rdjpgcom and wrjpgcom.
-Those source files should just be compiled by themselves; they don't
-depend on the JPEG library.
-
-There is a bug in some older versions of the Turbo C library which causes the
-space used by temporary files created with "tmpfile()" not to be freed after
-an abnormal program exit. If you check your disk afterwards, you will find
-cluster chains that are allocated but not used by a file. This should not
-happen in cjpeg/djpeg/jpegtran, since we enable a signal catcher to explicitly
-close temp files before exiting. But if you use the JPEG library with your
-own code, be sure to supply a signal catcher, or else use a different
-system-dependent memory manager.
-
-
-Cray:
-
-Should you be so fortunate as to be running JPEG on a Cray YMP, there is a
-compiler bug in old versions of Cray's Standard C (prior to 3.1). If you
-still have an old compiler, you'll need to insert a line reading
-"#pragma novector" just before the loop
- for (i = 1; i <= (int) htbl->bits[l]; i++)
- huffsize[p++] = (char) l;
-in fix_huff_tbl (in V5beta1, line 204 of jchuff.c and line 176 of jdhuff.c).
-[This bug may or may not still occur with the current IJG code, but it's
-probably a dead issue anyway...]
-
-
-HP-UX:
-
-If you have HP-UX 7.05 or later with the "software development" C compiler,
-you should run the compiler in ANSI mode. If using the configure script,
-say
- ./configure CC='cc -Aa'
-(or -Ae if you prefer). If configuring by hand, use makefile.ansi and add
-"-Aa" to the CFLAGS line in the makefile.
-
-If you have a pre-7.05 system, or if you are using the non-ANSI C compiler
-delivered with a minimum HP-UX system, then you must use makefile.unix
-(and do NOT add -Aa); or just run configure without the CC option.
-
-On HP 9000 series 800 machines, the HP C compiler is buggy in revisions prior
-to A.08.07. If you get complaints about "not a typedef name", you'll have to
-use makefile.unix, or run configure without the CC option.
-
-
-Macintosh, generic comments:
-
-The supplied user-interface files (cjpeg.c, djpeg.c, etc) are set up to
-provide a Unix-style command line interface. You can use this interface on
-the Mac by means of the ccommand() library routine provided by Metrowerks
-CodeWarrior or Think C. This is only appropriate for testing the library,
-however; to make a user-friendly equivalent of cjpeg/djpeg you'd really want
-to develop a Mac-style user interface. There isn't a complete example
-available at the moment, but there are some helpful starting points:
-1. Sam Bushell's free "To JPEG" applet provides drag-and-drop conversion to
-JPEG under System 7 and later. This only illustrates how to use the
-compression half of the library, but it does a very nice job of that part.
-The CodeWarrior source code is available from http://www.pobox.com/~jsam.
-2. Jim Brunner prepared a Mac-style user interface for both compression and
-decompression. Unfortunately, it hasn't been updated since IJG v4, and
-the library's API has changed considerably since then. Still it may be of
-some help, particularly as a guide to compiling the IJG code under Think C.
-Jim's code is available from the Info-Mac archives, at sumex-aim.stanford.edu
-or mirrors thereof; see file /info-mac/dev/src/jpeg-convert-c.hqx.
-
-jmemmac.c is the recommended memory manager back end for Macintosh. It uses
-NewPtr/DisposePtr instead of malloc/free, and has a Mac-specific
-implementation of jpeg_mem_available(). It also creates temporary files that
-follow Mac conventions. (That part of the code relies on System-7-or-later OS
-functions. See the comments in jmemmac.c if you need to run it on System 6.)
-NOTE that USE_MAC_MEMMGR must be defined in jconfig.h to use jmemmac.c.
-
-You can also use jmemnobs.c, if you don't care about handling images larger
-than available memory. If you use any memory manager back end other than
-jmemmac.c, we recommend replacing "malloc" and "free" by "NewPtr" and
-"DisposePtr", because Mac C libraries often have peculiar implementations of
-malloc/free. (For instance, free() may not return the freed space to the
-Mac Memory Manager. This is undesirable for the IJG code because jmemmgr.c
-already clumps space requests.)
-
-
-Macintosh, Metrowerks CodeWarrior:
-
-The Unix-command-line-style interface can be used by defining USE_CCOMMAND.
-You'll also need to define TWO_FILE_COMMANDLINE to avoid stdin/stdout.
-This means that when using the cjpeg/djpeg programs, you'll have to type the
-input and output file names in the "Arguments" text-edit box, rather than
-using the file radio buttons. (Perhaps USE_FDOPEN or USE_SETMODE would
-eliminate the problem, but I haven't heard from anyone who's tried it.)
-
-On 680x0 Macs, Metrowerks defines type "double" as a 10-byte IEEE extended
-float. jmemmgr.c won't like this: it wants sizeof(ALIGN_TYPE) to be a power
-of 2. Add "#define ALIGN_TYPE long" to jconfig.h to eliminate the complaint.
-
-The supplied configuration file jconfig.mac can be used for your jconfig.h;
-it includes all the recommended symbol definitions. If you have AppleScript
-installed, you can run the supplied script makeproj.mac to create CodeWarrior
-project files for the library and the testbed applications, then build the
-library and applications. (Thanks to Dan Sears and Don Agro for this nifty
-hack, which saves us from trying to maintain CodeWarrior project files as part
-of the IJG distribution...)
-
-
-Macintosh, Think C:
-
-The documentation in Jim Brunner's "JPEG Convert" source code (see above)
-includes detailed build instructions for Think C; it's probably somewhat
-out of date for the current release, but may be helpful.
-
-If you want to build the minimal command line version, proceed as follows.
-You'll have to prepare project files for the programs; we don't include any
-in the distribution since they are not text files. Use the file lists in
-any of the supplied makefiles as a guide. Also add the ANSI and Unix C
-libraries in a separate segment. You may need to divide the JPEG files into
-more than one segment; we recommend dividing compression and decompression
-modules. Define USE_CCOMMAND in jconfig.h so that the ccommand() routine is
-called. You must also define TWO_FILE_COMMANDLINE because stdin/stdout
-don't handle binary data correctly.
-
-On 680x0 Macs, Think C defines type "double" as a 12-byte IEEE extended float.
-jmemmgr.c won't like this: it wants sizeof(ALIGN_TYPE) to be a power of 2.
-Add "#define ALIGN_TYPE long" to jconfig.h to eliminate the complaint.
-
-jconfig.mac should work as a jconfig.h configuration file for Think C,
-but the makeproj.mac AppleScript script is specific to CodeWarrior. Sorry.
-
-
-MIPS R3000:
-
-MIPS's cc version 1.31 has a rather nasty optimization bug. Don't use -O
-if you have that compiler version. (Use "cc -V" to check the version.)
-Note that the R3000 chip is found in workstations from DEC and others.
-
-
-MS-DOS, generic comments for 16-bit compilers:
-
-The IJG code is designed to work well in 80x86 "small" or "medium" memory
-models (i.e., data pointers are 16 bits unless explicitly declared "far";
-code pointers can be either size). You may be able to use small model to
-compile cjpeg or djpeg by itself, but you will probably have to use medium
-model for any larger application. This won't make much difference in
-performance. You *will* take a noticeable performance hit if you use a
-large-data memory model, and you should avoid "huge" model if at all
-possible. Be sure that NEED_FAR_POINTERS is defined in jconfig.h if you use
-a small-data memory model; be sure it is NOT defined if you use a large-data
-model. (The supplied makefiles and jconfig files for Borland and Microsoft C
-compile in medium model and define NEED_FAR_POINTERS.)
-
-The DOS-specific memory manager, jmemdos.c, should be used if possible.
-It needs some assembly-code routines which are in jmemdosa.asm; make sure
-your makefile assembles that file and includes it in the library. If you
-don't have a suitable assembler, you can get pre-assembled object files for
-jmemdosa by FTP from ftp.uu.net:/graphics/jpeg/jdosaobj.zip. (DOS-oriented
-distributions of the IJG source code often include these object files.)
-
-When using jmemdos.c, jconfig.h must define USE_MSDOS_MEMMGR and must set
-MAX_ALLOC_CHUNK to less than 64K (65520L is a typical value). If your
-C library's far-heap malloc() can't allocate blocks that large, reduce
-MAX_ALLOC_CHUNK to whatever it can handle.
-
-If you can't use jmemdos.c for some reason --- for example, because you
-don't have an assembler to assemble jmemdosa.asm --- you'll have to fall
-back to jmemansi.c or jmemname.c. You'll probably still need to set
-MAX_ALLOC_CHUNK in jconfig.h, because most DOS C libraries won't malloc()
-more than 64K at a time. IMPORTANT: if you use jmemansi.c or jmemname.c,
-you will have to compile in a large-data memory model in order to get the
-right stdio library. Too bad.
-
-wrjpgcom needs to be compiled in large model, because it malloc()s a 64KB
-work area to hold the comment text. If your C library's malloc can't
-handle that, reduce MAX_COM_LENGTH as necessary in wrjpgcom.c.
-
-Most MS-DOS compilers treat stdin/stdout as text files, so you must use
-two-file command line style. But if your compiler has either fdopen() or
-setmode(), you can use one-file style if you like. To do this, define
-USE_SETMODE or USE_FDOPEN so that stdin/stdout will be set to binary mode.
-(USE_SETMODE seems to work with more DOS compilers than USE_FDOPEN.) You
-should test that I/O through stdin/stdout produces the same results as I/O
-to explicitly named files... the "make test" procedures in the supplied
-makefiles do NOT use stdin/stdout.
-
-
-MS-DOS, generic comments for 32-bit compilers:
-
-None of the above comments about memory models apply if you are using a
-32-bit flat-memory-space environment, such as DJGPP or Watcom C. (And you
-should use one if you have it, as performance will be much better than
-8086-compatible code!) For flat-memory-space compilers, do NOT define
-NEED_FAR_POINTERS, and do NOT use jmemdos.c. Use jmemnobs.c if the
-environment supplies adequate virtual memory, otherwise use jmemansi.c or
-jmemname.c.
-
-You'll still need to be careful about binary I/O through stdin/stdout.
-See the last paragraph of the previous section.
-
-
-MS-DOS, Borland C:
-
-Be sure to convert all the source files to DOS text format (CR/LF newlines).
-Although Borland C will often work OK with unmodified Unix (LF newlines)
-source files, sometimes it will give bogus compile errors.
-"Illegal character '#'" is the most common such error. (This is true with
-Borland C 3.1, but perhaps is fixed in newer releases.)
-
-If you want one-file command line style, just undefine TWO_FILE_COMMANDLINE.
-jconfig.bcc already includes #define USE_SETMODE to make this work.
-(fdopen does not work correctly.)
-
-
-MS-DOS, Microsoft C:
-
-makefile.mc6 works with Microsoft C, DOS Visual C++, etc. It should only
-be used if you want to build a 16-bit (small or medium memory model) program.
-
-If you want one-file command line style, just undefine TWO_FILE_COMMANDLINE.
-jconfig.mc6 already includes #define USE_SETMODE to make this work.
-(fdopen does not work correctly.)
-
-Note that this makefile assumes that the working copy of itself is called
-"makefile". If you want to call it something else, say "makefile.mak",
-be sure to adjust the dependency line that reads "$(RFILE) : makefile".
-Otherwise the make will fail because it doesn't know how to create "makefile".
-Worse, some releases of Microsoft's make utilities give an incorrect error
-message in this situation.
-
-Old versions of MS C fail with an "out of macro expansion space" error
-because they can't cope with the macro TRACEMS8 (defined in jerror.h).
-If this happens to you, the easiest solution is to change TRACEMS8 to
-expand to nothing. You'll lose the ability to dump out JPEG coefficient
-tables with djpeg -debug -debug, but at least you can compile.
-
-Original MS C 6.0 is very buggy; it compiles incorrect code unless you turn
-off optimization entirely (remove -O from CFLAGS). 6.00A is better, but it
-still generates bad code if you enable loop optimizations (-Ol or -Ox).
-
-MS C 8.0 crashes when compiling jquant1.c with optimization switch /Oo ...
-which is on by default. To work around this bug, compile that one file
-with /Oo-.
-
-
-Microsoft Windows (all versions), generic comments:
-
-Some Windows system include files define typedef boolean as "unsigned char".
-The IJG code also defines typedef boolean, but we make it "int" by default.
-This doesn't affect the IJG programs because we don't import those Windows
-include files. But if you use the JPEG library in your own program, and some
-of your program's files import one definition of boolean while some import the
-other, you can get all sorts of mysterious problems. A good preventive step
-is to make the IJG library use "unsigned char" for boolean. To do that,
-add something like this to your jconfig.h file:
- /* Define "boolean" as unsigned char, not int, per Windows custom */
- #ifndef __RPCNDR_H__ /* don't conflict if rpcndr.h already read */
- typedef unsigned char boolean;
- #endif
- #define HAVE_BOOLEAN /* prevent jmorecfg.h from redefining it */
-(This is already in jconfig.vc, by the way.)
-
-windef.h contains the declarations
- #define far
- #define FAR far
-Since jmorecfg.h tries to define FAR as empty, you may get a compiler
-warning if you include both jpeglib.h and windef.h (which windows.h
-includes). To suppress the warning, you can put "#ifndef FAR"/"#endif"
-around the line "#define FAR" in jmorecfg.h.
-
-When using the library in a Windows application, you will almost certainly
-want to modify or replace the error handler module jerror.c, since our
-default error handler does a couple of inappropriate things:
- 1. it tries to write error and warning messages on stderr;
- 2. in event of a fatal error, it exits by calling exit().
-
-A simple stopgap solution for problem 1 is to replace the line
- fprintf(stderr, "%s\n", buffer);
-(in output_message in jerror.c) with
- MessageBox(GetActiveWindow(),buffer,"JPEG Error",MB_OK|MB_ICONERROR);
-It's highly recommended that you at least do that much, since otherwise
-error messages will disappear into nowhere. (Beginning with IJG v6b, this
-code is already present in jerror.c; just define USE_WINDOWS_MESSAGEBOX in
-jconfig.h to enable it.)
-
-The proper solution for problem 2 is to return control to your calling
-application after a library error. This can be done with the setjmp/longjmp
-technique discussed in libjpeg.doc and illustrated in example.c. (NOTE:
-some older Windows C compilers provide versions of setjmp/longjmp that
-don't actually work under Windows. You may need to use the Windows system
-functions Catch and Throw instead.)
-
-The recommended memory manager under Windows is jmemnobs.c; in other words,
-let Windows do any virtual memory management needed. You should NOT use
-jmemdos.c nor jmemdosa.asm under Windows.
-
-For Windows 3.1, we recommend compiling in medium or large memory model;
-for newer Windows versions, use a 32-bit flat memory model. (See the MS-DOS
-sections above for more info about memory models.) In the 16-bit memory
-models only, you'll need to put
- #define MAX_ALLOC_CHUNK 65520L /* Maximum request to malloc() */
-into jconfig.h to limit allocation chunks to 64Kb. (Without that, you'd
-have to use huge memory model, which slows things down unnecessarily.)
-jmemnobs.c works without modification in large or flat memory models, but to
-use medium model, you need to modify its jpeg_get_large and jpeg_free_large
-routines to allocate far memory. In any case, you might like to replace
-its calls to malloc and free with direct calls on Windows memory allocation
-functions.
-
-You may also want to modify jdatasrc.c and jdatadst.c to use Windows file
-operations rather than fread/fwrite. This is only necessary if your C
-compiler doesn't provide a competent implementation of C stdio functions.
-
-You might want to tweak the RGB_xxx macros in jmorecfg.h so that the library
-will accept or deliver color pixels in BGR sample order, not RGB; BGR order
-is usually more convenient under Windows. Note that this change will break
-the sample applications cjpeg/djpeg, but the library itself works fine.
-
-
-Many people want to convert the IJG library into a DLL. This is reasonably
-straightforward, but watch out for the following:
-
- 1. Don't try to compile as a DLL in small or medium memory model; use
-large model, or even better, 32-bit flat model. Many places in the IJG code
-assume the address of a local variable is an ordinary (not FAR) pointer;
-that isn't true in a medium-model DLL.
-
- 2. Microsoft C cannot pass file pointers between applications and DLLs.
-(See Microsoft Knowledge Base, PSS ID Number Q50336.) So jdatasrc.c and
-jdatadst.c don't work if you open a file in your application and then pass
-the pointer to the DLL. One workaround is to make jdatasrc.c/jdatadst.c
-part of your main application rather than part of the DLL.
-
- 3. You'll probably need to modify the macros GLOBAL() and EXTERN() to
-attach suitable linkage keywords to the exported routine names. Similarly,
-you'll want to modify METHODDEF() and JMETHOD() to ensure function pointers
-are declared in a way that lets application routines be called back through
-the function pointers. These macros are in jmorecfg.h. Typical definitions
-for a 16-bit DLL are:
- #define GLOBAL(type) type _far _pascal _loadds _export
- #define EXTERN(type) extern type _far _pascal _loadds
- #define METHODDEF(type) static type _far _pascal
- #define JMETHOD(type,methodname,arglist) \
- type (_far _pascal *methodname) arglist
-For a 32-bit DLL you may want something like
- #define GLOBAL(type) __declspec(dllexport) type
- #define EXTERN(type) extern __declspec(dllexport) type
-Although not all the GLOBAL routines are actually intended to be called by
-the application, the performance cost of making them all DLL entry points is
-negligible.
-
-The unmodified IJG library presents a very C-specific application interface,
-so the resulting DLL is only usable from C or C++ applications. There has
-been some talk of writing wrapper code that would present a simpler interface
-usable from other languages, such as Visual Basic. This is on our to-do list
-but hasn't been very high priority --- any volunteers out there?
-
-
-Microsoft Windows, Borland C:
-
-The provided jconfig.bcc should work OK in a 32-bit Windows environment,
-but you'll need to tweak it in a 16-bit environment (you'd need to define
-NEED_FAR_POINTERS and MAX_ALLOC_CHUNK). Beware that makefile.bcc will need
-alteration if you want to use it for Windows --- in particular, you should
-use jmemnobs.c not jmemdos.c under Windows.
-
-Borland C++ 4.5 fails with an internal compiler error when trying to compile
-jdmerge.c in 32-bit mode. If enough people complain, perhaps Borland will fix
-it. In the meantime, the simplest known workaround is to add a redundant
-definition of the variable range_limit in h2v1_merged_upsample(), at the head
-of the block that handles odd image width (about line 268 in v6 jdmerge.c):
- /* If image width is odd, do the last output column separately */
- if (cinfo->output_width & 1) {
- register JSAMPLE * range_limit = cinfo->sample_range_limit; /* ADD THIS */
- cb = GETJSAMPLE(*inptr1);
-Pretty bizarre, especially since the very similar routine h2v2_merged_upsample
-doesn't trigger the bug.
-Recent reports suggest that this bug does not occur with "bcc32a" (the
-Pentium-optimized version of the compiler).
-
-Another report from a user of Borland C 4.5 was that incorrect code (leading
-to a color shift in processed images) was produced if any of the following
-optimization switch combinations were used:
- -Ot -Og
- -Ot -Op
- -Ot -Om
-So try backing off on optimization if you see such a problem. (Are there
-several different releases all numbered "4.5"??)
-
-
-Microsoft Windows, Microsoft Visual C++:
-
-jconfig.vc should work OK with any Microsoft compiler for a 32-bit memory
-model. makefile.vc is intended for command-line use. (If you are using
-the Developer Studio environment, you may prefer the DevStudio project
-files; see below.)
-
-Some users feel that it's easier to call the library from C++ code if you
-force VC++ to treat the library as C++ code, which you can do by renaming
-all the *.c files to *.cpp (and adjusting the makefile to match). This
-avoids the need to put extern "C" { ... } around #include "jpeglib.h" in
-your C++ application.
-
-
-Microsoft Windows, Microsoft Developer Studio:
-
-We include makefiles that should work as project files in DevStudio 4.2 or
-later. There is a library makefile that builds the IJG library as a static
-Win32 library, and an application makefile that builds the sample applications
-as Win32 console applications. (Even if you only want the library, we
-recommend building the applications so that you can run the self-test.)
-
-To use:
-1. Copy jconfig.vc to jconfig.h, makelib.ds to jpeg.mak, and
- makeapps.ds to apps.mak. (Note that the renaming is critical!)
-2. Click on the .mak files to construct project workspaces.
- (If you are using DevStudio more recent than 4.2, you'll probably
- get a message saying that the makefiles are being updated.)
-3. Build the library project, then the applications project.
-4. Move the application .exe files from `app`\Release to an
- appropriate location on your path.
-5. To perform the self-test, execute the command line
- NMAKE /f makefile.vc test
-
-
-OS/2, Borland C++:
-
-Watch out for optimization bugs in older Borland compilers; you may need
-to back off the optimization switch settings. See the comments in
-makefile.bcc.
-
-
-SGI:
-
-On some SGI systems, you may need to set "AR2= ar -ts" in the Makefile.
-If you are using configure, you can do this by saying
- ./configure RANLIB='ar -ts'
-This change is not needed on all SGIs. Use it only if the make fails at the
-stage of linking the completed programs.
-
-On the MIPS R4000 architecture (Indy, etc.), the compiler option "-mips2"
-reportedly speeds up the float DCT method substantially, enough to make it
-faster than the default int method (but still slower than the fast int
-method). If you use -mips2, you may want to alter the default DCT method to
-be float. To do this, put "#define JDCT_DEFAULT JDCT_FLOAT" in jconfig.h.
-
-
-VMS:
-
-On an Alpha/VMS system with MMS, be sure to use the "/Marco=Alpha=1"
-qualifier with MMS when building the JPEG package.
-
-VAX/VMS v5.5-1 may have problems with the test step of the build procedure
-reporting differences when it compares the original and test images. If the
-error points to the last block of the files, it is most likely bogus and may
-be safely ignored. It seems to be because the files are Stream_LF and
-Backup/Compare has difficulty with the (presumably) null padded files.
-This problem was not observed on VAX/VMS v6.1 or AXP/VMS v6.1.
+++ /dev/null
-/* jconfig.bcc --- jconfig.h for Borland C (Turbo C) on MS-DOS or OS/2. */
-/* see jconfig.doc for explanations */
-
-#define HAVE_PROTOTYPES
-#define HAVE_UNSIGNED_CHAR
-#define HAVE_UNSIGNED_SHORT
-/* #define void char */
-/* #define const */
-#undef CHAR_IS_UNSIGNED
-#define HAVE_STDDEF_H
-#define HAVE_STDLIB_H
-#undef NEED_BSD_STRINGS
-#undef NEED_SYS_TYPES_H
-#ifdef __MSDOS__
-#define NEED_FAR_POINTERS /* for small or medium memory model */
-#endif
-#undef NEED_SHORT_EXTERNAL_NAMES
-#undef INCOMPLETE_TYPES_BROKEN /* this assumes you have -w-stu in CFLAGS */
-
-#ifdef JPEG_INTERNALS
-
-#undef RIGHT_SHIFT_IS_UNSIGNED
-
-#ifdef __MSDOS__
-#define USE_MSDOS_MEMMGR /* Define this if you use jmemdos.c */
-#define MAX_ALLOC_CHUNK 65520L /* Maximum request to malloc() */
-#define USE_FMEM /* Borland has _fmemcpy() and _fmemset() */
-#endif
-
-#endif /* JPEG_INTERNALS */
-
-#ifdef JPEG_CJPEG_DJPEG
-
-#define BMP_SUPPORTED /* BMP image file format */
-#define GIF_SUPPORTED /* GIF image file format */
-#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
-#undef RLE_SUPPORTED /* Utah RLE image file format */
-#define TARGA_SUPPORTED /* Targa image file format */
-
-#define TWO_FILE_COMMANDLINE
-#define USE_SETMODE /* Borland has setmode() */
-#ifdef __MSDOS__
-#define NEED_SIGNAL_CATCHER /* Define this if you use jmemdos.c */
-#endif
-#undef DONT_USE_B_MODE
-#undef PROGRESS_REPORT /* optional */
-
-#endif /* JPEG_CJPEG_DJPEG */
+++ /dev/null
-/* jconfig.dj --- jconfig.h for DJGPP (Delorie's GNU C port) on MS-DOS. */
-/* see jconfig.doc for explanations */
-
-#define HAVE_PROTOTYPES
-#define HAVE_UNSIGNED_CHAR
-#define HAVE_UNSIGNED_SHORT
-/* #define void char */
-/* #define const */
-#undef CHAR_IS_UNSIGNED
-#define HAVE_STDDEF_H
-#define HAVE_STDLIB_H
-#undef NEED_BSD_STRINGS
-#undef NEED_SYS_TYPES_H
-#undef NEED_FAR_POINTERS /* DJGPP uses flat 32-bit addressing */
-#undef NEED_SHORT_EXTERNAL_NAMES
-#undef INCOMPLETE_TYPES_BROKEN
-
-#ifdef JPEG_INTERNALS
-
-#undef RIGHT_SHIFT_IS_UNSIGNED
-
-#endif /* JPEG_INTERNALS */
-
-#ifdef JPEG_CJPEG_DJPEG
-
-#define BMP_SUPPORTED /* BMP image file format */
-#define GIF_SUPPORTED /* GIF image file format */
-#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
-#undef RLE_SUPPORTED /* Utah RLE image file format */
-#define TARGA_SUPPORTED /* Targa image file format */
-
-#undef TWO_FILE_COMMANDLINE /* optional */
-#define USE_SETMODE /* Needed to make one-file style work in DJGPP */
-#undef NEED_SIGNAL_CATCHER /* Define this if you use jmemname.c */
-#undef DONT_USE_B_MODE
-#undef PROGRESS_REPORT /* optional */
-
-#endif /* JPEG_CJPEG_DJPEG */
+++ /dev/null
-/* jconfig.mac --- jconfig.h for CodeWarrior on Apple Macintosh */
-/* see jconfig.doc for explanations */
-
-#define HAVE_PROTOTYPES
-#define HAVE_UNSIGNED_CHAR
-#define HAVE_UNSIGNED_SHORT
-/* #define void char */
-/* #define const */
-#undef CHAR_IS_UNSIGNED
-#define HAVE_STDDEF_H
-#define HAVE_STDLIB_H
-#undef NEED_BSD_STRINGS
-#undef NEED_SYS_TYPES_H
-#undef NEED_FAR_POINTERS
-#undef NEED_SHORT_EXTERNAL_NAMES
-#undef INCOMPLETE_TYPES_BROKEN
-
-#ifdef JPEG_INTERNALS
-
-#undef RIGHT_SHIFT_IS_UNSIGNED
-
-#define USE_MAC_MEMMGR /* Define this if you use jmemmac.c */
-
-#define ALIGN_TYPE long /* Needed for 680x0 Macs */
-
-#endif /* JPEG_INTERNALS */
-
-#ifdef JPEG_CJPEG_DJPEG
-
-#define BMP_SUPPORTED /* BMP image file format */
-#define GIF_SUPPORTED /* GIF image file format */
-#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
-#undef RLE_SUPPORTED /* Utah RLE image file format */
-#define TARGA_SUPPORTED /* Targa image file format */
-
-#define USE_CCOMMAND /* Command line reader for Macintosh */
-#define TWO_FILE_COMMANDLINE /* Binary I/O thru stdin/stdout doesn't work */
-
-#undef NEED_SIGNAL_CATCHER
-#undef DONT_USE_B_MODE
-#undef PROGRESS_REPORT /* optional */
-
-#endif /* JPEG_CJPEG_DJPEG */
+++ /dev/null
-/* jconfig.manx --- jconfig.h for Amiga systems using Manx Aztec C ver 5.x. */
-/* see jconfig.doc for explanations */
-
-#define HAVE_PROTOTYPES
-#define HAVE_UNSIGNED_CHAR
-#define HAVE_UNSIGNED_SHORT
-/* #define void char */
-/* #define const */
-#undef CHAR_IS_UNSIGNED
-#define HAVE_STDDEF_H
-#define HAVE_STDLIB_H
-#undef NEED_BSD_STRINGS
-#undef NEED_SYS_TYPES_H
-#undef NEED_FAR_POINTERS
-#undef NEED_SHORT_EXTERNAL_NAMES
-#undef INCOMPLETE_TYPES_BROKEN
-
-#ifdef JPEG_INTERNALS
-
-#undef RIGHT_SHIFT_IS_UNSIGNED
-
-#define TEMP_DIRECTORY "JPEGTMP:" /* recommended setting for Amiga */
-
-#define SHORTxSHORT_32 /* produces better DCT code with Aztec C */
-
-#endif /* JPEG_INTERNALS */
-
-#ifdef JPEG_CJPEG_DJPEG
-
-#define BMP_SUPPORTED /* BMP image file format */
-#define GIF_SUPPORTED /* GIF image file format */
-#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
-#undef RLE_SUPPORTED /* Utah RLE image file format */
-#define TARGA_SUPPORTED /* Targa image file format */
-
-#define TWO_FILE_COMMANDLINE
-#define NEED_SIGNAL_CATCHER
-#undef DONT_USE_B_MODE
-#undef PROGRESS_REPORT /* optional */
-
-#define signal_catcher _abort /* hack for Aztec C naming requirements */
-
-#endif /* JPEG_CJPEG_DJPEG */
+++ /dev/null
-/* jconfig.mc6 --- jconfig.h for Microsoft C on MS-DOS, version 6.00A & up. */
-/* see jconfig.doc for explanations */
-
-#define HAVE_PROTOTYPES
-#define HAVE_UNSIGNED_CHAR
-#define HAVE_UNSIGNED_SHORT
-/* #define void char */
-/* #define const */
-#undef CHAR_IS_UNSIGNED
-#define HAVE_STDDEF_H
-#define HAVE_STDLIB_H
-#undef NEED_BSD_STRINGS
-#undef NEED_SYS_TYPES_H
-#define NEED_FAR_POINTERS /* for small or medium memory model */
-#undef NEED_SHORT_EXTERNAL_NAMES
-#undef INCOMPLETE_TYPES_BROKEN
-
-#ifdef JPEG_INTERNALS
-
-#undef RIGHT_SHIFT_IS_UNSIGNED
-
-#define USE_MSDOS_MEMMGR /* Define this if you use jmemdos.c */
-
-#define MAX_ALLOC_CHUNK 65520L /* Maximum request to malloc() */
-
-#define USE_FMEM /* Microsoft has _fmemcpy() and _fmemset() */
-
-#define NEED_FHEAPMIN /* far heap management routines are broken */
-
-#define SHORTxLCONST_32 /* enable compiler-specific DCT optimization */
-/* Note: the above define is known to improve the code with Microsoft C 6.00A.
- * I do not know whether it is good for later compiler versions.
- * Please report any info on this point to jpeg-info@uunet.uu.net.
- */
-
-#endif /* JPEG_INTERNALS */
-
-#ifdef JPEG_CJPEG_DJPEG
-
-#define BMP_SUPPORTED /* BMP image file format */
-#define GIF_SUPPORTED /* GIF image file format */
-#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
-#undef RLE_SUPPORTED /* Utah RLE image file format */
-#define TARGA_SUPPORTED /* Targa image file format */
-
-#define TWO_FILE_COMMANDLINE
-#define USE_SETMODE /* Microsoft has setmode() */
-#define NEED_SIGNAL_CATCHER /* Define this if you use jmemdos.c */
-#undef DONT_USE_B_MODE
-#undef PROGRESS_REPORT /* optional */
-
-#endif /* JPEG_CJPEG_DJPEG */
+++ /dev/null
-/* jconfig.sas --- jconfig.h for Amiga systems using SAS C 6.0 and up. */
-/* see jconfig.doc for explanations */
-
-#define HAVE_PROTOTYPES
-#define HAVE_UNSIGNED_CHAR
-#define HAVE_UNSIGNED_SHORT
-/* #define void char */
-/* #define const */
-#undef CHAR_IS_UNSIGNED
-#define HAVE_STDDEF_H
-#define HAVE_STDLIB_H
-#undef NEED_BSD_STRINGS
-#undef NEED_SYS_TYPES_H
-#undef NEED_FAR_POINTERS
-#undef NEED_SHORT_EXTERNAL_NAMES
-#undef INCOMPLETE_TYPES_BROKEN
-
-#ifdef JPEG_INTERNALS
-
-#undef RIGHT_SHIFT_IS_UNSIGNED
-
-#define TEMP_DIRECTORY "JPEGTMP:" /* recommended setting for Amiga */
-
-#define NO_MKTEMP /* SAS C doesn't have mktemp() */
-
-#define SHORTxSHORT_32 /* produces better DCT code with SAS C */
-
-#endif /* JPEG_INTERNALS */
-
-#ifdef JPEG_CJPEG_DJPEG
-
-#define BMP_SUPPORTED /* BMP image file format */
-#define GIF_SUPPORTED /* GIF image file format */
-#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
-#undef RLE_SUPPORTED /* Utah RLE image file format */
-#define TARGA_SUPPORTED /* Targa image file format */
-
-#define TWO_FILE_COMMANDLINE
-#define NEED_SIGNAL_CATCHER
-#undef DONT_USE_B_MODE
-#undef PROGRESS_REPORT /* optional */
-
-#endif /* JPEG_CJPEG_DJPEG */
+++ /dev/null
-/* jconfig.st --- jconfig.h for Atari ST/STE/TT using Pure C or Turbo C. */
-/* see jconfig.doc for explanations */
-
-#define HAVE_PROTOTYPES
-#define HAVE_UNSIGNED_CHAR
-#define HAVE_UNSIGNED_SHORT
-/* #define void char */
-/* #define const */
-#undef CHAR_IS_UNSIGNED
-#define HAVE_STDDEF_H
-#define HAVE_STDLIB_H
-#undef NEED_BSD_STRINGS
-#undef NEED_SYS_TYPES_H
-#undef NEED_FAR_POINTERS
-#undef NEED_SHORT_EXTERNAL_NAMES
-#define INCOMPLETE_TYPES_BROKEN /* suppress undefined-structure warnings */
-
-#ifdef JPEG_INTERNALS
-
-#undef RIGHT_SHIFT_IS_UNSIGNED
-
-#define ALIGN_TYPE long /* apparently double is a weird size? */
-
-#endif /* JPEG_INTERNALS */
-
-#ifdef JPEG_CJPEG_DJPEG
-
-#define BMP_SUPPORTED /* BMP image file format */
-#define GIF_SUPPORTED /* GIF image file format */
-#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
-#undef RLE_SUPPORTED /* Utah RLE image file format */
-#define TARGA_SUPPORTED /* Targa image file format */
-
-#define TWO_FILE_COMMANDLINE /* optional -- undef if you like Unix style */
-/* Note: if you undef TWO_FILE_COMMANDLINE, you may need to define
- * USE_SETMODE. Some Atari compilers require it, some do not.
- */
-#define NEED_SIGNAL_CATCHER /* needed if you use jmemname.c */
-#undef DONT_USE_B_MODE
-#undef PROGRESS_REPORT /* optional */
-
-#endif /* JPEG_CJPEG_DJPEG */
+++ /dev/null
-/* jconfig.vms --- jconfig.h for use on Digital VMS. */
-/* see jconfig.doc for explanations */
-
-#define HAVE_PROTOTYPES
-#define HAVE_UNSIGNED_CHAR
-#define HAVE_UNSIGNED_SHORT
-/* #define void char */
-/* #define const */
-#undef CHAR_IS_UNSIGNED
-#define HAVE_STDDEF_H
-#define HAVE_STDLIB_H
-#undef NEED_BSD_STRINGS
-#undef NEED_SYS_TYPES_H
-#undef NEED_FAR_POINTERS
-#undef NEED_SHORT_EXTERNAL_NAMES
-#undef INCOMPLETE_TYPES_BROKEN
-
-#ifdef JPEG_INTERNALS
-
-#undef RIGHT_SHIFT_IS_UNSIGNED
-
-#endif /* JPEG_INTERNALS */
-
-#ifdef JPEG_CJPEG_DJPEG
-
-#define BMP_SUPPORTED /* BMP image file format */
-#define GIF_SUPPORTED /* GIF image file format */
-#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
-#undef RLE_SUPPORTED /* Utah RLE image file format */
-#define TARGA_SUPPORTED /* Targa image file format */
-
-#define TWO_FILE_COMMANDLINE /* Needed on VMS */
-#undef NEED_SIGNAL_CATCHER
-#undef DONT_USE_B_MODE
-#undef PROGRESS_REPORT /* optional */
-
-#endif /* JPEG_CJPEG_DJPEG */
+++ /dev/null
-/* jconfig.wat --- jconfig.h for Watcom C/C++ on MS-DOS or OS/2. */
-/* see jconfig.doc for explanations */
-
-#define HAVE_PROTOTYPES
-#define HAVE_UNSIGNED_CHAR
-#define HAVE_UNSIGNED_SHORT
-/* #define void char */
-/* #define const */
-#define CHAR_IS_UNSIGNED
-#define HAVE_STDDEF_H
-#define HAVE_STDLIB_H
-#undef NEED_BSD_STRINGS
-#undef NEED_SYS_TYPES_H
-#undef NEED_FAR_POINTERS /* Watcom uses flat 32-bit addressing */
-#undef NEED_SHORT_EXTERNAL_NAMES
-#undef INCOMPLETE_TYPES_BROKEN
-
-#ifdef JPEG_INTERNALS
-
-#undef RIGHT_SHIFT_IS_UNSIGNED
-
-#endif /* JPEG_INTERNALS */
-
-#ifdef JPEG_CJPEG_DJPEG
-
-#define BMP_SUPPORTED /* BMP image file format */
-#define GIF_SUPPORTED /* GIF image file format */
-#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
-#undef RLE_SUPPORTED /* Utah RLE image file format */
-#define TARGA_SUPPORTED /* Targa image file format */
-
-#undef TWO_FILE_COMMANDLINE /* optional */
-#define USE_SETMODE /* Needed to make one-file style work in Watcom */
-#undef NEED_SIGNAL_CATCHER /* Define this if you use jmemname.c */
-#undef DONT_USE_B_MODE
-#undef PROGRESS_REPORT /* optional */
-
-#endif /* JPEG_CJPEG_DJPEG */
+++ /dev/null
-/*
- * jmemansi.c
- *
- * Copyright (C) 1992-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file provides a simple generic implementation of the system-
- * dependent portion of the JPEG memory manager. This implementation
- * assumes that you have the ANSI-standard library routine tmpfile().
- * Also, the problem of determining the amount of memory available
- * is shoved onto the user.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jmemsys.h" /* import the system-dependent declarations */
-
-#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc(),free() */
-extern void * malloc JPP((size_t size));
-extern void free JPP((void *ptr));
-#endif
-
-#ifndef SEEK_SET /* pre-ANSI systems may not define this; */
-#define SEEK_SET 0 /* if not, assume 0 is correct */
-#endif
-
-
-/*
- * Memory allocation and freeing are controlled by the regular library
- * routines malloc() and free().
- */
-
-GLOBAL(void *)
-jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void *) malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
-{
- free(object);
-}
-
-
-/*
- * "Large" objects are treated the same as "small" ones.
- * NB: although we include FAR keywords in the routine declarations,
- * this file won't actually work in 80x86 small/medium model; at least,
- * you probably won't be able to process useful-size images in only 64KB.
- */
-
-GLOBAL(void FAR *)
-jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void FAR *) malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
-{
- free(object);
-}
-
-
-/*
- * This routine computes the total memory space available for allocation.
- * It's impossible to do this in a portable way; our current solution is
- * to make the user tell us (with a default value set at compile time).
- * If you can actually get the available space, it's a good idea to subtract
- * a slop factor of 5% or so.
- */
-
-#ifndef DEFAULT_MAX_MEM /* so can override from makefile */
-#define DEFAULT_MAX_MEM 1000000L /* default: one megabyte */
-#endif
-
-GLOBAL(long)
-jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
- long max_bytes_needed, long already_allocated)
-{
- return cinfo->mem->max_memory_to_use - already_allocated;
-}
-
-
-/*
- * Backing store (temporary file) management.
- * Backing store objects are only used when the value returned by
- * jpeg_mem_available is less than the total space needed. You can dispense
- * with these routines if you have plenty of virtual memory; see jmemnobs.c.
- */
-
-
-METHODDEF(void)
-read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- if (fseek(info->temp_file, file_offset, SEEK_SET))
- ERREXIT(cinfo, JERR_TFILE_SEEK);
- if (JFREAD(info->temp_file, buffer_address, byte_count)
- != (size_t) byte_count)
- ERREXIT(cinfo, JERR_TFILE_READ);
-}
-
-
-METHODDEF(void)
-write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- if (fseek(info->temp_file, file_offset, SEEK_SET))
- ERREXIT(cinfo, JERR_TFILE_SEEK);
- if (JFWRITE(info->temp_file, buffer_address, byte_count)
- != (size_t) byte_count)
- ERREXIT(cinfo, JERR_TFILE_WRITE);
-}
-
-
-METHODDEF(void)
-close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
-{
- fclose(info->temp_file);
- /* Since this implementation uses tmpfile() to create the file,
- * no explicit file deletion is needed.
- */
-}
-
-
-/*
- * Initial opening of a backing-store object.
- *
- * This version uses tmpfile(), which constructs a suitable file name
- * behind the scenes. We don't have to use info->temp_name[] at all;
- * indeed, we can't even find out the actual name of the temp file.
- */
-
-GLOBAL(void)
-jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- if ((info->temp_file = tmpfile()) == NULL)
- ERREXITS(cinfo, JERR_TFILE_CREATE, "");
- info->read_backing_store = read_backing_store;
- info->write_backing_store = write_backing_store;
- info->close_backing_store = close_backing_store;
-}
-
-
-/*
- * These routines take care of any system-dependent initialization and
- * cleanup required.
- */
-
-GLOBAL(long)
-jpeg_mem_init (j_common_ptr cinfo)
-{
- return DEFAULT_MAX_MEM; /* default for max_memory_to_use */
-}
-
-GLOBAL(void)
-jpeg_mem_term (j_common_ptr cinfo)
-{
- /* no work */
-}
+++ /dev/null
-/*
- * jmemdos.c
- *
- * Copyright (C) 1992-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file provides an MS-DOS-compatible implementation of the system-
- * dependent portion of the JPEG memory manager. Temporary data can be
- * stored in extended or expanded memory as well as in regular DOS files.
- *
- * If you use this file, you must be sure that NEED_FAR_POINTERS is defined
- * if you compile in a small-data memory model; it should NOT be defined if
- * you use a large-data memory model. This file is not recommended if you
- * are using a flat-memory-space 386 environment such as DJGCC or Watcom C.
- * Also, this code will NOT work if struct fields are aligned on greater than
- * 2-byte boundaries.
- *
- * Based on code contributed by Ge' Weijers.
- */
-
-/*
- * If you have both extended and expanded memory, you may want to change the
- * order in which they are tried in jopen_backing_store. On a 286 machine
- * expanded memory is usually faster, since extended memory access involves
- * an expensive protected-mode-and-back switch. On 386 and better, extended
- * memory is usually faster. As distributed, the code tries extended memory
- * first (what? not everyone has a 386? :-).
- *
- * You can disable use of extended/expanded memory entirely by altering these
- * definitions or overriding them from the Makefile (eg, -DEMS_SUPPORTED=0).
- */
-
-#ifndef XMS_SUPPORTED
-#define XMS_SUPPORTED 1
-#endif
-#ifndef EMS_SUPPORTED
-#define EMS_SUPPORTED 1
-#endif
-
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jmemsys.h" /* import the system-dependent declarations */
-
-#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare these */
-extern void * malloc JPP((size_t size));
-extern void free JPP((void *ptr));
-extern char * getenv JPP((const char * name));
-#endif
-
-#ifdef NEED_FAR_POINTERS
-
-#ifdef __TURBOC__
-/* These definitions work for Borland C (Turbo C) */
-#include <alloc.h> /* need farmalloc(), farfree() */
-#define far_malloc(x) farmalloc(x)
-#define far_free(x) farfree(x)
-#else
-/* These definitions work for Microsoft C and compatible compilers */
-#include <malloc.h> /* need _fmalloc(), _ffree() */
-#define far_malloc(x) _fmalloc(x)
-#define far_free(x) _ffree(x)
-#endif
-
-#else /* not NEED_FAR_POINTERS */
-
-#define far_malloc(x) malloc(x)
-#define far_free(x) free(x)
-
-#endif /* NEED_FAR_POINTERS */
-
-#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
-#define READ_BINARY "r"
-#else
-#define READ_BINARY "rb"
-#endif
-
-#ifndef USE_MSDOS_MEMMGR /* make sure user got configuration right */
- You forgot to define USE_MSDOS_MEMMGR in jconfig.h. /* deliberate syntax error */
-#endif
-
-#if MAX_ALLOC_CHUNK >= 65535L /* make sure jconfig.h got this right */
- MAX_ALLOC_CHUNK should be less than 64K. /* deliberate syntax error */
-#endif
-
-
-/*
- * Declarations for assembly-language support routines (see jmemdosa.asm).
- *
- * The functions are declared "far" as are all their pointer arguments;
- * this ensures the assembly source code will work regardless of the
- * compiler memory model. We assume "short" is 16 bits, "long" is 32.
- */
-
-typedef void far * XMSDRIVER; /* actually a pointer to code */
-typedef struct { /* registers for calling XMS driver */
- unsigned short ax, dx, bx;
- void far * ds_si;
- } XMScontext;
-typedef struct { /* registers for calling EMS driver */
- unsigned short ax, dx, bx;
- void far * ds_si;
- } EMScontext;
-
-extern short far jdos_open JPP((short far * handle, char far * filename));
-extern short far jdos_close JPP((short handle));
-extern short far jdos_seek JPP((short handle, long offset));
-extern short far jdos_read JPP((short handle, void far * buffer,
- unsigned short count));
-extern short far jdos_write JPP((short handle, void far * buffer,
- unsigned short count));
-extern void far jxms_getdriver JPP((XMSDRIVER far *));
-extern void far jxms_calldriver JPP((XMSDRIVER, XMScontext far *));
-extern short far jems_available JPP((void));
-extern void far jems_calldriver JPP((EMScontext far *));
-
-
-/*
- * Selection of a file name for a temporary file.
- * This is highly system-dependent, and you may want to customize it.
- */
-
-static int next_file_num; /* to distinguish among several temp files */
-
-LOCAL(void)
-select_file_name (char * fname)
-{
- const char * env;
- char * ptr;
- FILE * tfile;
-
- /* Keep generating file names till we find one that's not in use */
- for (;;) {
- /* Get temp directory name from environment TMP or TEMP variable;
- * if none, use "."
- */
- if ((env = (const char *) getenv("TMP")) == NULL)
- if ((env = (const char *) getenv("TEMP")) == NULL)
- env = ".";
- if (*env == '\0') /* null string means "." */
- env = ".";
- ptr = fname; /* copy name to fname */
- while (*env != '\0')
- *ptr++ = *env++;
- if (ptr[-1] != '\\' && ptr[-1] != '/')
- *ptr++ = '\\'; /* append backslash if not in env variable */
- /* Append a suitable file name */
- next_file_num++; /* advance counter */
- sprintf(ptr, "JPG%03d.TMP", next_file_num);
- /* Probe to see if file name is already in use */
- if ((tfile = fopen(fname, READ_BINARY)) == NULL)
- break;
- fclose(tfile); /* oops, it's there; close tfile & try again */
- }
-}
-
-
-/*
- * Near-memory allocation and freeing are controlled by the regular library
- * routines malloc() and free().
- */
-
-GLOBAL(void *)
-jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void *) malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
-{
- free(object);
-}
-
-
-/*
- * "Large" objects are allocated in far memory, if possible
- */
-
-GLOBAL(void FAR *)
-jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void FAR *) far_malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
-{
- far_free(object);
-}
-
-
-/*
- * This routine computes the total memory space available for allocation.
- * It's impossible to do this in a portable way; our current solution is
- * to make the user tell us (with a default value set at compile time).
- * If you can actually get the available space, it's a good idea to subtract
- * a slop factor of 5% or so.
- */
-
-#ifndef DEFAULT_MAX_MEM /* so can override from makefile */
-#define DEFAULT_MAX_MEM 300000L /* for total usage about 450K */
-#endif
-
-GLOBAL(long)
-jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
- long max_bytes_needed, long already_allocated)
-{
- return cinfo->mem->max_memory_to_use - already_allocated;
-}
-
-
-/*
- * Backing store (temporary file) management.
- * Backing store objects are only used when the value returned by
- * jpeg_mem_available is less than the total space needed. You can dispense
- * with these routines if you have plenty of virtual memory; see jmemnobs.c.
- */
-
-/*
- * For MS-DOS we support three types of backing storage:
- * 1. Conventional DOS files. We access these by direct DOS calls rather
- * than via the stdio package. This provides a bit better performance,
- * but the real reason is that the buffers to be read or written are FAR.
- * The stdio library for small-data memory models can't cope with that.
- * 2. Extended memory, accessed per the XMS V2.0 specification.
- * 3. Expanded memory, accessed per the LIM/EMS 4.0 specification.
- * You'll need copies of those specs to make sense of the related code.
- * The specs are available by Internet FTP from the SIMTEL archives
- * (oak.oakland.edu and its various mirror sites). See files
- * pub/msdos/microsoft/xms20.arc and pub/msdos/info/limems41.zip.
- */
-
-
-/*
- * Access methods for a DOS file.
- */
-
-
-METHODDEF(void)
-read_file_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- if (jdos_seek(info->handle.file_handle, file_offset))
- ERREXIT(cinfo, JERR_TFILE_SEEK);
- /* Since MAX_ALLOC_CHUNK is less than 64K, byte_count will be too. */
- if (byte_count > 65535L) /* safety check */
- ERREXIT(cinfo, JERR_BAD_ALLOC_CHUNK);
- if (jdos_read(info->handle.file_handle, buffer_address,
- (unsigned short) byte_count))
- ERREXIT(cinfo, JERR_TFILE_READ);
-}
-
-
-METHODDEF(void)
-write_file_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- if (jdos_seek(info->handle.file_handle, file_offset))
- ERREXIT(cinfo, JERR_TFILE_SEEK);
- /* Since MAX_ALLOC_CHUNK is less than 64K, byte_count will be too. */
- if (byte_count > 65535L) /* safety check */
- ERREXIT(cinfo, JERR_BAD_ALLOC_CHUNK);
- if (jdos_write(info->handle.file_handle, buffer_address,
- (unsigned short) byte_count))
- ERREXIT(cinfo, JERR_TFILE_WRITE);
-}
-
-
-METHODDEF(void)
-close_file_store (j_common_ptr cinfo, backing_store_ptr info)
-{
- jdos_close(info->handle.file_handle); /* close the file */
- remove(info->temp_name); /* delete the file */
-/* If your system doesn't have remove(), try unlink() instead.
- * remove() is the ANSI-standard name for this function, but
- * unlink() was more common in pre-ANSI systems.
- */
- TRACEMSS(cinfo, 1, JTRC_TFILE_CLOSE, info->temp_name);
-}
-
-
-LOCAL(boolean)
-open_file_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- short handle;
-
- select_file_name(info->temp_name);
- if (jdos_open((short far *) & handle, (char far *) info->temp_name)) {
- /* might as well exit since jpeg_open_backing_store will fail anyway */
- ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
- return FALSE;
- }
- info->handle.file_handle = handle;
- info->read_backing_store = read_file_store;
- info->write_backing_store = write_file_store;
- info->close_backing_store = close_file_store;
- TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name);
- return TRUE; /* succeeded */
-}
-
-
-/*
- * Access methods for extended memory.
- */
-
-#if XMS_SUPPORTED
-
-static XMSDRIVER xms_driver; /* saved address of XMS driver */
-
-typedef union { /* either long offset or real-mode pointer */
- long offset;
- void far * ptr;
- } XMSPTR;
-
-typedef struct { /* XMS move specification structure */
- long length;
- XMSH src_handle;
- XMSPTR src;
- XMSH dst_handle;
- XMSPTR dst;
- } XMSspec;
-
-#define ODD(X) (((X) & 1L) != 0)
-
-
-METHODDEF(void)
-read_xms_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- XMScontext ctx;
- XMSspec spec;
- char endbuffer[2];
-
- /* The XMS driver can't cope with an odd length, so handle the last byte
- * specially if byte_count is odd. We don't expect this to be common.
- */
-
- spec.length = byte_count & (~ 1L);
- spec.src_handle = info->handle.xms_handle;
- spec.src.offset = file_offset;
- spec.dst_handle = 0;
- spec.dst.ptr = buffer_address;
-
- ctx.ds_si = (void far *) & spec;
- ctx.ax = 0x0b00; /* EMB move */
- jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
- if (ctx.ax != 1)
- ERREXIT(cinfo, JERR_XMS_READ);
-
- if (ODD(byte_count)) {
- read_xms_store(cinfo, info, (void FAR *) endbuffer,
- file_offset + byte_count - 1L, 2L);
- ((char FAR *) buffer_address)[byte_count - 1L] = endbuffer[0];
- }
-}
-
-
-METHODDEF(void)
-write_xms_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- XMScontext ctx;
- XMSspec spec;
- char endbuffer[2];
-
- /* The XMS driver can't cope with an odd length, so handle the last byte
- * specially if byte_count is odd. We don't expect this to be common.
- */
-
- spec.length = byte_count & (~ 1L);
- spec.src_handle = 0;
- spec.src.ptr = buffer_address;
- spec.dst_handle = info->handle.xms_handle;
- spec.dst.offset = file_offset;
-
- ctx.ds_si = (void far *) & spec;
- ctx.ax = 0x0b00; /* EMB move */
- jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
- if (ctx.ax != 1)
- ERREXIT(cinfo, JERR_XMS_WRITE);
-
- if (ODD(byte_count)) {
- read_xms_store(cinfo, info, (void FAR *) endbuffer,
- file_offset + byte_count - 1L, 2L);
- endbuffer[0] = ((char FAR *) buffer_address)[byte_count - 1L];
- write_xms_store(cinfo, info, (void FAR *) endbuffer,
- file_offset + byte_count - 1L, 2L);
- }
-}
-
-
-METHODDEF(void)
-close_xms_store (j_common_ptr cinfo, backing_store_ptr info)
-{
- XMScontext ctx;
-
- ctx.dx = info->handle.xms_handle;
- ctx.ax = 0x0a00;
- jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
- TRACEMS1(cinfo, 1, JTRC_XMS_CLOSE, info->handle.xms_handle);
- /* we ignore any error return from the driver */
-}
-
-
-LOCAL(boolean)
-open_xms_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- XMScontext ctx;
-
- /* Get address of XMS driver */
- jxms_getdriver((XMSDRIVER far *) & xms_driver);
- if (xms_driver == NULL)
- return FALSE; /* no driver to be had */
-
- /* Get version number, must be >= 2.00 */
- ctx.ax = 0x0000;
- jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
- if (ctx.ax < (unsigned short) 0x0200)
- return FALSE;
-
- /* Try to get space (expressed in kilobytes) */
- ctx.dx = (unsigned short) ((total_bytes_needed + 1023L) >> 10);
- ctx.ax = 0x0900;
- jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
- if (ctx.ax != 1)
- return FALSE;
-
- /* Succeeded, save the handle and away we go */
- info->handle.xms_handle = ctx.dx;
- info->read_backing_store = read_xms_store;
- info->write_backing_store = write_xms_store;
- info->close_backing_store = close_xms_store;
- TRACEMS1(cinfo, 1, JTRC_XMS_OPEN, ctx.dx);
- return TRUE; /* succeeded */
-}
-
-#endif /* XMS_SUPPORTED */
-
-
-/*
- * Access methods for expanded memory.
- */
-
-#if EMS_SUPPORTED
-
-/* The EMS move specification structure requires word and long fields aligned
- * at odd byte boundaries. Some compilers will align struct fields at even
- * byte boundaries. While it's usually possible to force byte alignment,
- * that causes an overall performance penalty and may pose problems in merging
- * JPEG into a larger application. Instead we accept some rather dirty code
- * here. Note this code would fail if the hardware did not allow odd-byte
- * word & long accesses, but all 80x86 CPUs do.
- */
-
-typedef void far * EMSPTR;
-
-typedef union { /* EMS move specification structure */
- long length; /* It's easy to access first 4 bytes */
- char bytes[18]; /* Misaligned fields in here! */
- } EMSspec;
-
-/* Macros for accessing misaligned fields */
-#define FIELD_AT(spec,offset,type) (*((type *) &(spec.bytes[offset])))
-#define SRC_TYPE(spec) FIELD_AT(spec,4,char)
-#define SRC_HANDLE(spec) FIELD_AT(spec,5,EMSH)
-#define SRC_OFFSET(spec) FIELD_AT(spec,7,unsigned short)
-#define SRC_PAGE(spec) FIELD_AT(spec,9,unsigned short)
-#define SRC_PTR(spec) FIELD_AT(spec,7,EMSPTR)
-#define DST_TYPE(spec) FIELD_AT(spec,11,char)
-#define DST_HANDLE(spec) FIELD_AT(spec,12,EMSH)
-#define DST_OFFSET(spec) FIELD_AT(spec,14,unsigned short)
-#define DST_PAGE(spec) FIELD_AT(spec,16,unsigned short)
-#define DST_PTR(spec) FIELD_AT(spec,14,EMSPTR)
-
-#define EMSPAGESIZE 16384L /* gospel, see the EMS specs */
-
-#define HIBYTE(W) (((W) >> 8) & 0xFF)
-#define LOBYTE(W) ((W) & 0xFF)
-
-
-METHODDEF(void)
-read_ems_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- EMScontext ctx;
- EMSspec spec;
-
- spec.length = byte_count;
- SRC_TYPE(spec) = 1;
- SRC_HANDLE(spec) = info->handle.ems_handle;
- SRC_PAGE(spec) = (unsigned short) (file_offset / EMSPAGESIZE);
- SRC_OFFSET(spec) = (unsigned short) (file_offset % EMSPAGESIZE);
- DST_TYPE(spec) = 0;
- DST_HANDLE(spec) = 0;
- DST_PTR(spec) = buffer_address;
-
- ctx.ds_si = (void far *) & spec;
- ctx.ax = 0x5700; /* move memory region */
- jems_calldriver((EMScontext far *) & ctx);
- if (HIBYTE(ctx.ax) != 0)
- ERREXIT(cinfo, JERR_EMS_READ);
-}
-
-
-METHODDEF(void)
-write_ems_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- EMScontext ctx;
- EMSspec spec;
-
- spec.length = byte_count;
- SRC_TYPE(spec) = 0;
- SRC_HANDLE(spec) = 0;
- SRC_PTR(spec) = buffer_address;
- DST_TYPE(spec) = 1;
- DST_HANDLE(spec) = info->handle.ems_handle;
- DST_PAGE(spec) = (unsigned short) (file_offset / EMSPAGESIZE);
- DST_OFFSET(spec) = (unsigned short) (file_offset % EMSPAGESIZE);
-
- ctx.ds_si = (void far *) & spec;
- ctx.ax = 0x5700; /* move memory region */
- jems_calldriver((EMScontext far *) & ctx);
- if (HIBYTE(ctx.ax) != 0)
- ERREXIT(cinfo, JERR_EMS_WRITE);
-}
-
-
-METHODDEF(void)
-close_ems_store (j_common_ptr cinfo, backing_store_ptr info)
-{
- EMScontext ctx;
-
- ctx.ax = 0x4500;
- ctx.dx = info->handle.ems_handle;
- jems_calldriver((EMScontext far *) & ctx);
- TRACEMS1(cinfo, 1, JTRC_EMS_CLOSE, info->handle.ems_handle);
- /* we ignore any error return from the driver */
-}
-
-
-LOCAL(boolean)
-open_ems_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- EMScontext ctx;
-
- /* Is EMS driver there? */
- if (! jems_available())
- return FALSE;
-
- /* Get status, make sure EMS is OK */
- ctx.ax = 0x4000;
- jems_calldriver((EMScontext far *) & ctx);
- if (HIBYTE(ctx.ax) != 0)
- return FALSE;
-
- /* Get version, must be >= 4.0 */
- ctx.ax = 0x4600;
- jems_calldriver((EMScontext far *) & ctx);
- if (HIBYTE(ctx.ax) != 0 || LOBYTE(ctx.ax) < 0x40)
- return FALSE;
-
- /* Try to allocate requested space */
- ctx.ax = 0x4300;
- ctx.bx = (unsigned short) ((total_bytes_needed + EMSPAGESIZE-1L) / EMSPAGESIZE);
- jems_calldriver((EMScontext far *) & ctx);
- if (HIBYTE(ctx.ax) != 0)
- return FALSE;
-
- /* Succeeded, save the handle and away we go */
- info->handle.ems_handle = ctx.dx;
- info->read_backing_store = read_ems_store;
- info->write_backing_store = write_ems_store;
- info->close_backing_store = close_ems_store;
- TRACEMS1(cinfo, 1, JTRC_EMS_OPEN, ctx.dx);
- return TRUE; /* succeeded */
-}
-
-#endif /* EMS_SUPPORTED */
-
-
-/*
- * Initial opening of a backing-store object.
- */
-
-GLOBAL(void)
-jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- /* Try extended memory, then expanded memory, then regular file. */
-#if XMS_SUPPORTED
- if (open_xms_store(cinfo, info, total_bytes_needed))
- return;
-#endif
-#if EMS_SUPPORTED
- if (open_ems_store(cinfo, info, total_bytes_needed))
- return;
-#endif
- if (open_file_store(cinfo, info, total_bytes_needed))
- return;
- ERREXITS(cinfo, JERR_TFILE_CREATE, "");
-}
-
-
-/*
- * These routines take care of any system-dependent initialization and
- * cleanup required.
- */
-
-GLOBAL(long)
-jpeg_mem_init (j_common_ptr cinfo)
-{
- next_file_num = 0; /* initialize temp file name generator */
- return DEFAULT_MAX_MEM; /* default for max_memory_to_use */
-}
-
-GLOBAL(void)
-jpeg_mem_term (j_common_ptr cinfo)
-{
- /* Microsoft C, at least in v6.00A, will not successfully reclaim freed
- * blocks of size > 32Kbytes unless we give it a kick in the rear, like so:
- */
-#ifdef NEED_FHEAPMIN
- _fheapmin();
-#endif
-}
+++ /dev/null
-;
-; jmemdosa.asm
-;
-; Copyright (C) 1992, Thomas G. Lane.
-; This file is part of the Independent JPEG Group's software.
-; For conditions of distribution and use, see the accompanying README file.
-;
-; This file contains low-level interface routines to support the MS-DOS
-; backing store manager (jmemdos.c). Routines are provided to access disk
-; files through direct DOS calls, and to access XMS and EMS drivers.
-;
-; This file should assemble with Microsoft's MASM or any compatible
-; assembler (including Borland's Turbo Assembler). If you haven't got
-; a compatible assembler, better fall back to jmemansi.c or jmemname.c.
-;
-; To minimize dependence on the C compiler's register usage conventions,
-; we save and restore all 8086 registers, even though most compilers only
-; require SI,DI,DS to be preserved. Also, we use only 16-bit-wide return
-; values, which everybody returns in AX.
-;
-; Based on code contributed by Ge' Weijers.
-;
-
-JMEMDOSA_TXT segment byte public 'CODE'
-
- assume cs:JMEMDOSA_TXT
-
- public _jdos_open
- public _jdos_close
- public _jdos_seek
- public _jdos_read
- public _jdos_write
- public _jxms_getdriver
- public _jxms_calldriver
- public _jems_available
- public _jems_calldriver
-
-;
-; short far jdos_open (short far * handle, char far * filename)
-;
-; Create and open a temporary file
-;
-_jdos_open proc far
- push bp ; linkage
- mov bp,sp
- push si ; save all registers for safety
- push di
- push bx
- push cx
- push dx
- push es
- push ds
- mov cx,0 ; normal file attributes
- lds dx,dword ptr [bp+10] ; get filename pointer
- mov ah,3ch ; create file
- int 21h
- jc open_err ; if failed, return error code
- lds bx,dword ptr [bp+6] ; get handle pointer
- mov word ptr [bx],ax ; save the handle
- xor ax,ax ; return zero for OK
-open_err: pop ds ; restore registers and exit
- pop es
- pop dx
- pop cx
- pop bx
- pop di
- pop si
- pop bp
- ret
-_jdos_open endp
-
-
-;
-; short far jdos_close (short handle)
-;
-; Close the file handle
-;
-_jdos_close proc far
- push bp ; linkage
- mov bp,sp
- push si ; save all registers for safety
- push di
- push bx
- push cx
- push dx
- push es
- push ds
- mov bx,word ptr [bp+6] ; file handle
- mov ah,3eh ; close file
- int 21h
- jc close_err ; if failed, return error code
- xor ax,ax ; return zero for OK
-close_err: pop ds ; restore registers and exit
- pop es
- pop dx
- pop cx
- pop bx
- pop di
- pop si
- pop bp
- ret
-_jdos_close endp
-
-
-;
-; short far jdos_seek (short handle, long offset)
-;
-; Set file position
-;
-_jdos_seek proc far
- push bp ; linkage
- mov bp,sp
- push si ; save all registers for safety
- push di
- push bx
- push cx
- push dx
- push es
- push ds
- mov bx,word ptr [bp+6] ; file handle
- mov dx,word ptr [bp+8] ; LS offset
- mov cx,word ptr [bp+10] ; MS offset
- mov ax,4200h ; absolute seek
- int 21h
- jc seek_err ; if failed, return error code
- xor ax,ax ; return zero for OK
-seek_err: pop ds ; restore registers and exit
- pop es
- pop dx
- pop cx
- pop bx
- pop di
- pop si
- pop bp
- ret
-_jdos_seek endp
-
-
-;
-; short far jdos_read (short handle, void far * buffer, unsigned short count)
-;
-; Read from file
-;
-_jdos_read proc far
- push bp ; linkage
- mov bp,sp
- push si ; save all registers for safety
- push di
- push bx
- push cx
- push dx
- push es
- push ds
- mov bx,word ptr [bp+6] ; file handle
- lds dx,dword ptr [bp+8] ; buffer address
- mov cx,word ptr [bp+12] ; number of bytes
- mov ah,3fh ; read file
- int 21h
- jc read_err ; if failed, return error code
- cmp ax,word ptr [bp+12] ; make sure all bytes were read
- je read_ok
- mov ax,1 ; else return 1 for not OK
- jmp short read_err
-read_ok: xor ax,ax ; return zero for OK
-read_err: pop ds ; restore registers and exit
- pop es
- pop dx
- pop cx
- pop bx
- pop di
- pop si
- pop bp
- ret
-_jdos_read endp
-
-
-;
-; short far jdos_write (short handle, void far * buffer, unsigned short count)
-;
-; Write to file
-;
-_jdos_write proc far
- push bp ; linkage
- mov bp,sp
- push si ; save all registers for safety
- push di
- push bx
- push cx
- push dx
- push es
- push ds
- mov bx,word ptr [bp+6] ; file handle
- lds dx,dword ptr [bp+8] ; buffer address
- mov cx,word ptr [bp+12] ; number of bytes
- mov ah,40h ; write file
- int 21h
- jc write_err ; if failed, return error code
- cmp ax,word ptr [bp+12] ; make sure all bytes written
- je write_ok
- mov ax,1 ; else return 1 for not OK
- jmp short write_err
-write_ok: xor ax,ax ; return zero for OK
-write_err: pop ds ; restore registers and exit
- pop es
- pop dx
- pop cx
- pop bx
- pop di
- pop si
- pop bp
- ret
-_jdos_write endp
-
-
-;
-; void far jxms_getdriver (XMSDRIVER far *)
-;
-; Get the address of the XMS driver, or NULL if not available
-;
-_jxms_getdriver proc far
- push bp ; linkage
- mov bp,sp
- push si ; save all registers for safety
- push di
- push bx
- push cx
- push dx
- push es
- push ds
- mov ax,4300h ; call multiplex interrupt with
- int 2fh ; a magic cookie, hex 4300
- cmp al,80h ; AL should contain hex 80
- je xmsavail
- xor dx,dx ; no XMS driver available
- xor ax,ax ; return a nil pointer
- jmp short xmsavail_done
-xmsavail: mov ax,4310h ; fetch driver address with
- int 2fh ; another magic cookie
- mov dx,es ; copy address to dx:ax
- mov ax,bx
-xmsavail_done: les bx,dword ptr [bp+6] ; get pointer to return value
- mov word ptr es:[bx],ax
- mov word ptr es:[bx+2],dx
- pop ds ; restore registers and exit
- pop es
- pop dx
- pop cx
- pop bx
- pop di
- pop si
- pop bp
- ret
-_jxms_getdriver endp
-
-
-;
-; void far jxms_calldriver (XMSDRIVER, XMScontext far *)
-;
-; The XMScontext structure contains values for the AX,DX,BX,SI,DS registers.
-; These are loaded, the XMS call is performed, and the new values of the
-; AX,DX,BX registers are written back to the context structure.
-;
-_jxms_calldriver proc far
- push bp ; linkage
- mov bp,sp
- push si ; save all registers for safety
- push di
- push bx
- push cx
- push dx
- push es
- push ds
- les bx,dword ptr [bp+10] ; get XMScontext pointer
- mov ax,word ptr es:[bx] ; load registers
- mov dx,word ptr es:[bx+2]
- mov si,word ptr es:[bx+6]
- mov ds,word ptr es:[bx+8]
- mov bx,word ptr es:[bx+4]
- call dword ptr [bp+6] ; call the driver
- mov cx,bx ; save returned BX for a sec
- les bx,dword ptr [bp+10] ; get XMScontext pointer
- mov word ptr es:[bx],ax ; put back ax,dx,bx
- mov word ptr es:[bx+2],dx
- mov word ptr es:[bx+4],cx
- pop ds ; restore registers and exit
- pop es
- pop dx
- pop cx
- pop bx
- pop di
- pop si
- pop bp
- ret
-_jxms_calldriver endp
-
-
-;
-; short far jems_available (void)
-;
-; Have we got an EMS driver? (this comes straight from the EMS 4.0 specs)
-;
-_jems_available proc far
- push si ; save all registers for safety
- push di
- push bx
- push cx
- push dx
- push es
- push ds
- mov ax,3567h ; get interrupt vector 67h
- int 21h
- push cs
- pop ds
- mov di,000ah ; check offs 10 in returned seg
- lea si,ASCII_device_name ; against literal string
- mov cx,8
- cld
- repe cmpsb
- jne no_ems
- mov ax,1 ; match, it's there
- jmp short avail_done
-no_ems: xor ax,ax ; it's not there
-avail_done: pop ds ; restore registers and exit
- pop es
- pop dx
- pop cx
- pop bx
- pop di
- pop si
- ret
-
-ASCII_device_name db "EMMXXXX0"
-
-_jems_available endp
-
-
-;
-; void far jems_calldriver (EMScontext far *)
-;
-; The EMScontext structure contains values for the AX,DX,BX,SI,DS registers.
-; These are loaded, the EMS trap is performed, and the new values of the
-; AX,DX,BX registers are written back to the context structure.
-;
-_jems_calldriver proc far
- push bp ; linkage
- mov bp,sp
- push si ; save all registers for safety
- push di
- push bx
- push cx
- push dx
- push es
- push ds
- les bx,dword ptr [bp+6] ; get EMScontext pointer
- mov ax,word ptr es:[bx] ; load registers
- mov dx,word ptr es:[bx+2]
- mov si,word ptr es:[bx+6]
- mov ds,word ptr es:[bx+8]
- mov bx,word ptr es:[bx+4]
- int 67h ; call the EMS driver
- mov cx,bx ; save returned BX for a sec
- les bx,dword ptr [bp+6] ; get EMScontext pointer
- mov word ptr es:[bx],ax ; put back ax,dx,bx
- mov word ptr es:[bx+2],dx
- mov word ptr es:[bx+4],cx
- pop ds ; restore registers and exit
- pop es
- pop dx
- pop cx
- pop bx
- pop di
- pop si
- pop bp
- ret
-_jems_calldriver endp
-
-JMEMDOSA_TXT ends
-
- end
+++ /dev/null
-/*
- * jmemmac.c
- *
- * Copyright (C) 1992-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * jmemmac.c provides an Apple Macintosh implementation of the system-
- * dependent portion of the JPEG memory manager.
- *
- * If you use jmemmac.c, then you must define USE_MAC_MEMMGR in the
- * JPEG_INTERNALS part of jconfig.h.
- *
- * jmemmac.c uses the Macintosh toolbox routines NewPtr and DisposePtr
- * instead of malloc and free. It accurately determines the amount of
- * memory available by using CompactMem. Notice that if left to its
- * own devices, this code can chew up all available space in the
- * application's zone, with the exception of the rather small "slop"
- * factor computed in jpeg_mem_available(). The application can ensure
- * that more space is left over by reducing max_memory_to_use.
- *
- * Large images are swapped to disk using temporary files and System 7.0+'s
- * temporary folder functionality.
- *
- * Note that jmemmac.c depends on two features of MacOS that were first
- * introduced in System 7: FindFolder and the FSSpec-based calls.
- * If your application uses jmemmac.c and is run under System 6 or earlier,
- * and the jpeg library decides it needs a temporary file, it will abort,
- * printing error messages about requiring System 7. (If no temporary files
- * are created, it will run fine.)
- *
- * If you want to use jmemmac.c in an application that might be used with
- * System 6 or earlier, then you should remove dependencies on FindFolder
- * and the FSSpec calls. You will need to replace FindFolder with some
- * other mechanism for finding a place to put temporary files, and you
- * should replace the FSSpec calls with their HFS equivalents:
- *
- * FSpDelete -> HDelete
- * FSpGetFInfo -> HGetFInfo
- * FSpCreate -> HCreate
- * FSpOpenDF -> HOpen *** Note: not HOpenDF ***
- * FSMakeFSSpec -> (fill in spec by hand.)
- *
- * (Use HOpen instead of HOpenDF. HOpen is just a glue-interface to PBHOpen,
- * which is on all HFS macs. HOpenDF is a System 7 addition which avoids the
- * ages-old problem of names starting with a period.)
- *
- * Contributed by Sam Bushell (jsam@iagu.on.net) and
- * Dan Gildor (gyld@in-touch.com).
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jmemsys.h" /* import the system-dependent declarations */
-
-#ifndef USE_MAC_MEMMGR /* make sure user got configuration right */
- You forgot to define USE_MAC_MEMMGR in jconfig.h. /* deliberate syntax error */
-#endif
-
-#include <Memory.h> /* we use the MacOS memory manager */
-#include <Files.h> /* we use the MacOS File stuff */
-#include <Folders.h> /* we use the MacOS HFS stuff */
-#include <Script.h> /* for smSystemScript */
-#include <Gestalt.h> /* we use Gestalt to test for specific functionality */
-
-#ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */
-#define TEMP_FILE_NAME "JPG%03d.TMP"
-#endif
-
-static int next_file_num; /* to distinguish among several temp files */
-
-
-/*
- * Memory allocation and freeing are controlled by the MacOS library
- * routines NewPtr() and DisposePtr(), which allocate fixed-address
- * storage. Unfortunately, the IJG library isn't smart enough to cope
- * with relocatable storage.
- */
-
-GLOBAL(void *)
-jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void *) NewPtr(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
-{
- DisposePtr((Ptr) object);
-}
-
-
-/*
- * "Large" objects are treated the same as "small" ones.
- * NB: we include FAR keywords in the routine declarations simply for
- * consistency with the rest of the IJG code; FAR should expand to empty
- * on rational architectures like the Mac.
- */
-
-GLOBAL(void FAR *)
-jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void FAR *) NewPtr(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
-{
- DisposePtr((Ptr) object);
-}
-
-
-/*
- * This routine computes the total memory space available for allocation.
- */
-
-GLOBAL(long)
-jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
- long max_bytes_needed, long already_allocated)
-{
- long limit = cinfo->mem->max_memory_to_use - already_allocated;
- long slop, mem;
-
- /* Don't ask for more than what application has told us we may use */
- if (max_bytes_needed > limit && limit > 0)
- max_bytes_needed = limit;
- /* Find whether there's a big enough free block in the heap.
- * CompactMem tries to create a contiguous block of the requested size,
- * and then returns the size of the largest free block (which could be
- * much more or much less than we asked for).
- * We add some slop to ensure we don't use up all available memory.
- */
- slop = max_bytes_needed / 16 + 32768L;
- mem = CompactMem(max_bytes_needed + slop) - slop;
- if (mem < 0)
- mem = 0; /* sigh, couldn't even get the slop */
- /* Don't take more than the application says we can have */
- if (mem > limit && limit > 0)
- mem = limit;
- return mem;
-}
-
-
-/*
- * Backing store (temporary file) management.
- * Backing store objects are only used when the value returned by
- * jpeg_mem_available is less than the total space needed. You can dispense
- * with these routines if you have plenty of virtual memory; see jmemnobs.c.
- */
-
-
-METHODDEF(void)
-read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- long bytes = byte_count;
- long retVal;
-
- if ( SetFPos ( info->temp_file, fsFromStart, file_offset ) != noErr )
- ERREXIT(cinfo, JERR_TFILE_SEEK);
-
- retVal = FSRead ( info->temp_file, &bytes,
- (unsigned char *) buffer_address );
- if ( retVal != noErr || bytes != byte_count )
- ERREXIT(cinfo, JERR_TFILE_READ);
-}
-
-
-METHODDEF(void)
-write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- long bytes = byte_count;
- long retVal;
-
- if ( SetFPos ( info->temp_file, fsFromStart, file_offset ) != noErr )
- ERREXIT(cinfo, JERR_TFILE_SEEK);
-
- retVal = FSWrite ( info->temp_file, &bytes,
- (unsigned char *) buffer_address );
- if ( retVal != noErr || bytes != byte_count )
- ERREXIT(cinfo, JERR_TFILE_WRITE);
-}
-
-
-METHODDEF(void)
-close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
-{
- FSClose ( info->temp_file );
- FSpDelete ( &(info->tempSpec) );
-}
-
-
-/*
- * Initial opening of a backing-store object.
- *
- * This version uses FindFolder to find the Temporary Items folder,
- * and puts the temporary file in there.
- */
-
-GLOBAL(void)
-jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- short tmpRef, vRefNum;
- long dirID;
- FInfo finderInfo;
- FSSpec theSpec;
- Str255 fName;
- OSErr osErr;
- long gestaltResponse = 0;
-
- /* Check that FSSpec calls are available. */
- osErr = Gestalt( gestaltFSAttr, &gestaltResponse );
- if ( ( osErr != noErr )
- || !( gestaltResponse & (1<<gestaltHasFSSpecCalls) ) )
- ERREXITS(cinfo, JERR_TFILE_CREATE, "- System 7.0 or later required");
- /* TO DO: add a proper error message to jerror.h. */
-
- /* Check that FindFolder is available. */
- osErr = Gestalt( gestaltFindFolderAttr, &gestaltResponse );
- if ( ( osErr != noErr )
- || !( gestaltResponse & (1<<gestaltFindFolderPresent) ) )
- ERREXITS(cinfo, JERR_TFILE_CREATE, "- System 7.0 or later required.");
- /* TO DO: add a proper error message to jerror.h. */
-
- osErr = FindFolder ( kOnSystemDisk, kTemporaryFolderType, kCreateFolder,
- &vRefNum, &dirID );
- if ( osErr != noErr )
- ERREXITS(cinfo, JERR_TFILE_CREATE, "- temporary items folder unavailable");
- /* TO DO: Try putting the temp files somewhere else. */
-
- /* Keep generating file names till we find one that's not in use */
- for (;;) {
- next_file_num++; /* advance counter */
-
- sprintf(info->temp_name, TEMP_FILE_NAME, next_file_num);
- strcpy ( (Ptr)fName+1, info->temp_name );
- *fName = strlen (info->temp_name);
- osErr = FSMakeFSSpec ( vRefNum, dirID, fName, &theSpec );
-
- if ( (osErr = FSpGetFInfo ( &theSpec, &finderInfo ) ) != noErr )
- break;
- }
-
- osErr = FSpCreate ( &theSpec, '????', '????', smSystemScript );
- if ( osErr != noErr )
- ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
-
- osErr = FSpOpenDF ( &theSpec, fsRdWrPerm, &(info->temp_file) );
- if ( osErr != noErr )
- ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
-
- info->tempSpec = theSpec;
-
- info->read_backing_store = read_backing_store;
- info->write_backing_store = write_backing_store;
- info->close_backing_store = close_backing_store;
- TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name);
-}
-
-
-/*
- * These routines take care of any system-dependent initialization and
- * cleanup required.
- */
-
-GLOBAL(long)
-jpeg_mem_init (j_common_ptr cinfo)
-{
- next_file_num = 0;
-
- /* max_memory_to_use will be initialized to FreeMem()'s result;
- * the calling application might later reduce it, for example
- * to leave room to invoke multiple JPEG objects.
- * Note that FreeMem returns the total number of free bytes;
- * it may not be possible to allocate a single block of this size.
- */
- return FreeMem();
-}
-
-GLOBAL(void)
-jpeg_mem_term (j_common_ptr cinfo)
-{
- /* no work */
-}
+++ /dev/null
-/*
- * jmemname.c
- *
- * Copyright (C) 1992-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file provides a generic implementation of the system-dependent
- * portion of the JPEG memory manager. This implementation assumes that
- * you must explicitly construct a name for each temp file.
- * Also, the problem of determining the amount of memory available
- * is shoved onto the user.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jmemsys.h" /* import the system-dependent declarations */
-
-#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc(),free() */
-extern void * malloc JPP((size_t size));
-extern void free JPP((void *ptr));
-#endif
-
-#ifndef SEEK_SET /* pre-ANSI systems may not define this; */
-#define SEEK_SET 0 /* if not, assume 0 is correct */
-#endif
-
-#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
-#define READ_BINARY "r"
-#define RW_BINARY "w+"
-#else
-#ifdef VMS /* VMS is very nonstandard */
-#define READ_BINARY "rb", "ctx=stm"
-#define RW_BINARY "w+b", "ctx=stm"
-#else /* standard ANSI-compliant case */
-#define READ_BINARY "rb"
-#define RW_BINARY "w+b"
-#endif
-#endif
-
-
-/*
- * Selection of a file name for a temporary file.
- * This is system-dependent!
- *
- * The code as given is suitable for most Unix systems, and it is easily
- * modified for most non-Unix systems. Some notes:
- * 1. The temp file is created in the directory named by TEMP_DIRECTORY.
- * The default value is /usr/tmp, which is the conventional place for
- * creating large temp files on Unix. On other systems you'll probably
- * want to change the file location. You can do this by editing the
- * #define, or (preferred) by defining TEMP_DIRECTORY in jconfig.h.
- *
- * 2. If you need to change the file name as well as its location,
- * you can override the TEMP_FILE_NAME macro. (Note that this is
- * actually a printf format string; it must contain %s and %d.)
- * Few people should need to do this.
- *
- * 3. mktemp() is used to ensure that multiple processes running
- * simultaneously won't select the same file names. If your system
- * doesn't have mktemp(), define NO_MKTEMP to do it the hard way.
- * (If you don't have <errno.h>, also define NO_ERRNO_H.)
- *
- * 4. You probably want to define NEED_SIGNAL_CATCHER so that cjpeg.c/djpeg.c
- * will cause the temp files to be removed if you stop the program early.
- */
-
-#ifndef TEMP_DIRECTORY /* can override from jconfig.h or Makefile */
-#define TEMP_DIRECTORY "/usr/tmp/" /* recommended setting for Unix */
-#endif
-
-static int next_file_num; /* to distinguish among several temp files */
-
-#ifdef NO_MKTEMP
-
-#ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */
-#define TEMP_FILE_NAME "%sJPG%03d.TMP"
-#endif
-
-#ifndef NO_ERRNO_H
-#include <errno.h> /* to define ENOENT */
-#endif
-
-/* ANSI C specifies that errno is a macro, but on older systems it's more
- * likely to be a plain int variable. And not all versions of errno.h
- * bother to declare it, so we have to in order to be most portable. Thus:
- */
-#ifndef errno
-extern int errno;
-#endif
-
-
-LOCAL(void)
-select_file_name (char * fname)
-{
- FILE * tfile;
-
- /* Keep generating file names till we find one that's not in use */
- for (;;) {
- next_file_num++; /* advance counter */
- sprintf(fname, TEMP_FILE_NAME, TEMP_DIRECTORY, next_file_num);
- if ((tfile = fopen(fname, READ_BINARY)) == NULL) {
- /* fopen could have failed for a reason other than the file not
- * being there; for example, file there but unreadable.
- * If <errno.h> isn't available, then we cannot test the cause.
- */
-#ifdef ENOENT
- if (errno != ENOENT)
- continue;
-#endif
- break;
- }
- fclose(tfile); /* oops, it's there; close tfile & try again */
- }
-}
-
-#else /* ! NO_MKTEMP */
-
-/* Note that mktemp() requires the initial filename to end in six X's */
-#ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */
-#define TEMP_FILE_NAME "%sJPG%dXXXXXX"
-#endif
-
-LOCAL(void)
-select_file_name (char * fname)
-{
- next_file_num++; /* advance counter */
- sprintf(fname, TEMP_FILE_NAME, TEMP_DIRECTORY, next_file_num);
- mktemp(fname); /* make sure file name is unique */
- /* mktemp replaces the trailing XXXXXX with a unique string of characters */
-}
-
-#endif /* NO_MKTEMP */
-
-
-/*
- * Memory allocation and freeing are controlled by the regular library
- * routines malloc() and free().
- */
-
-GLOBAL(void *)
-jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void *) malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
-{
- free(object);
-}
-
-
-/*
- * "Large" objects are treated the same as "small" ones.
- * NB: although we include FAR keywords in the routine declarations,
- * this file won't actually work in 80x86 small/medium model; at least,
- * you probably won't be able to process useful-size images in only 64KB.
- */
-
-GLOBAL(void FAR *)
-jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
-{
- return (void FAR *) malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
-{
- free(object);
-}
-
-
-/*
- * This routine computes the total memory space available for allocation.
- * It's impossible to do this in a portable way; our current solution is
- * to make the user tell us (with a default value set at compile time).
- * If you can actually get the available space, it's a good idea to subtract
- * a slop factor of 5% or so.
- */
-
-#ifndef DEFAULT_MAX_MEM /* so can override from makefile */
-#define DEFAULT_MAX_MEM 1000000L /* default: one megabyte */
-#endif
-
-GLOBAL(long)
-jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
- long max_bytes_needed, long already_allocated)
-{
- return cinfo->mem->max_memory_to_use - already_allocated;
-}
-
-
-/*
- * Backing store (temporary file) management.
- * Backing store objects are only used when the value returned by
- * jpeg_mem_available is less than the total space needed. You can dispense
- * with these routines if you have plenty of virtual memory; see jmemnobs.c.
- */
-
-
-METHODDEF(void)
-read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- if (fseek(info->temp_file, file_offset, SEEK_SET))
- ERREXIT(cinfo, JERR_TFILE_SEEK);
- if (JFREAD(info->temp_file, buffer_address, byte_count)
- != (size_t) byte_count)
- ERREXIT(cinfo, JERR_TFILE_READ);
-}
-
-
-METHODDEF(void)
-write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- void FAR * buffer_address,
- long file_offset, long byte_count)
-{
- if (fseek(info->temp_file, file_offset, SEEK_SET))
- ERREXIT(cinfo, JERR_TFILE_SEEK);
- if (JFWRITE(info->temp_file, buffer_address, byte_count)
- != (size_t) byte_count)
- ERREXIT(cinfo, JERR_TFILE_WRITE);
-}
-
-
-METHODDEF(void)
-close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
-{
- fclose(info->temp_file); /* close the file */
- unlink(info->temp_name); /* delete the file */
-/* If your system doesn't have unlink(), use remove() instead.
- * remove() is the ANSI-standard name for this function, but if
- * your system was ANSI you'd be using jmemansi.c, right?
- */
- TRACEMSS(cinfo, 1, JTRC_TFILE_CLOSE, info->temp_name);
-}
-
-
-/*
- * Initial opening of a backing-store object.
- */
-
-GLOBAL(void)
-jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
- long total_bytes_needed)
-{
- select_file_name(info->temp_name);
- if ((info->temp_file = fopen(info->temp_name, RW_BINARY)) == NULL)
- ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
- info->read_backing_store = read_backing_store;
- info->write_backing_store = write_backing_store;
- info->close_backing_store = close_backing_store;
- TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name);
-}
-
-
-/*
- * These routines take care of any system-dependent initialization and
- * cleanup required.
- */
-
-GLOBAL(long)
-jpeg_mem_init (j_common_ptr cinfo)
-{
- next_file_num = 0; /* initialize temp file name generator */
- return DEFAULT_MAX_MEM; /* default for max_memory_to_use */
-}
-
-GLOBAL(void)
-jpeg_mem_term (j_common_ptr cinfo)
-{
- /* no work */
-}
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+++ /dev/null
-.TH JPEGTRAN 1 "3 August 1997"
-.SH NAME
-jpegtran \- lossless transformation of JPEG files
-.SH SYNOPSIS
-.B jpegtran
-[
-.I options
-]
-[
-.I filename
-]
-.LP
-.SH DESCRIPTION
-.LP
-.B jpegtran
-performs various useful transformations of JPEG files.
-It can translate the coded representation from one variant of JPEG to another,
-for example from baseline JPEG to progressive JPEG or vice versa. It can also
-perform some rearrangements of the image data, for example turning an image
-from landscape to portrait format by rotation.
-.PP
-.B jpegtran
-works by rearranging the compressed data (DCT coefficients), without
-ever fully decoding the image. Therefore, its transformations are lossless:
-there is no image degradation at all, which would not be true if you used
-.B djpeg
-followed by
-.B cjpeg
-to accomplish the same conversion. But by the same token,
-.B jpegtran
-cannot perform lossy operations such as changing the image quality.
-.PP
-.B jpegtran
-reads the named JPEG/JFIF file, or the standard input if no file is
-named, and produces a JPEG/JFIF file on the standard output.
-.SH OPTIONS
-All switch names may be abbreviated; for example,
-.B \-optimize
-may be written
-.B \-opt
-or
-.BR \-o .
-Upper and lower case are equivalent.
-British spellings are also accepted (e.g.,
-.BR \-optimise ),
-though for brevity these are not mentioned below.
-.PP
-To specify the coded JPEG representation used in the output file,
-.B jpegtran
-accepts a subset of the switches recognized by
-.BR cjpeg :
-.TP
-.B \-optimize
-Perform optimization of entropy encoding parameters.
-.TP
-.B \-progressive
-Create progressive JPEG file.
-.TP
-.BI \-restart " N"
-Emit a JPEG restart marker every N MCU rows, or every N MCU blocks if "B" is
-attached to the number.
-.TP
-.BI \-scans " file"
-Use the scan script given in the specified text file.
-.PP
-See
-.BR cjpeg (1)
-for more details about these switches.
-If you specify none of these switches, you get a plain baseline-JPEG output
-file. The quality setting and so forth are determined by the input file.
-.PP
-The image can be losslessly transformed by giving one of these switches:
-.TP
-.B \-flip horizontal
-Mirror image horizontally (left-right).
-.TP
-.B \-flip vertical
-Mirror image vertically (top-bottom).
-.TP
-.B \-rotate 90
-Rotate image 90 degrees clockwise.
-.TP
-.B \-rotate 180
-Rotate image 180 degrees.
-.TP
-.B \-rotate 270
-Rotate image 270 degrees clockwise (or 90 ccw).
-.TP
-.B \-transpose
-Transpose image (across UL-to-LR axis).
-.TP
-.B \-transverse
-Transverse transpose (across UR-to-LL axis).
-.PP
-The transpose transformation has no restrictions regarding image dimensions.
-The other transformations operate rather oddly if the image dimensions are not
-a multiple of the iMCU size (usually 8 or 16 pixels), because they can only
-transform complete blocks of DCT coefficient data in the desired way.
-.PP
-.BR jpegtran 's
-default behavior when transforming an odd-size image is designed
-to preserve exact reversibility and mathematical consistency of the
-transformation set. As stated, transpose is able to flip the entire image
-area. Horizontal mirroring leaves any partial iMCU column at the right edge
-untouched, but is able to flip all rows of the image. Similarly, vertical
-mirroring leaves any partial iMCU row at the bottom edge untouched, but is
-able to flip all columns. The other transforms can be built up as sequences
-of transpose and flip operations; for consistency, their actions on edge
-pixels are defined to be the same as the end result of the corresponding
-transpose-and-flip sequence.
-.PP
-For practical use, you may prefer to discard any untransformable edge pixels
-rather than having a strange-looking strip along the right and/or bottom edges
-of a transformed image. To do this, add the
-.B \-trim
-switch:
-.TP
-.B \-trim
-Drop non-transformable edge blocks.
-.PP
-Obviously, a transformation with
-.B \-trim
-is not reversible, so strictly speaking
-.B jpegtran
-with this switch is not lossless. Also, the expected mathematical
-equivalences between the transformations no longer hold. For example,
-.B \-rot 270 -trim
-trims only the bottom edge, but
-.B \-rot 90 -trim
-followed by
-.B \-rot 180 -trim
-trims both edges.
-.PP
-Another not-strictly-lossless transformation switch is:
-.TP
-.B \-grayscale
-Force grayscale output.
-.PP
-This option discards the chrominance channels if the input image is YCbCr
-(ie, a standard color JPEG), resulting in a grayscale JPEG file. The
-luminance channel is preserved exactly, so this is a better method of reducing
-to grayscale than decompression, conversion, and recompression. This switch
-is particularly handy for fixing a monochrome picture that was mistakenly
-encoded as a color JPEG. (In such a case, the space savings from getting rid
-of the near-empty chroma channels won't be large; but the decoding time for
-a grayscale JPEG is substantially less than that for a color JPEG.)
-.PP
-.B jpegtran
-also recognizes these switches that control what to do with "extra" markers,
-such as comment blocks:
-.TP
-.B \-copy none
-Copy no extra markers from source file. This setting suppresses all
-comments and other excess baggage present in the source file.
-.TP
-.B \-copy comments
-Copy only comment markers. This setting copies comments from the source file,
-but discards any other inessential data.
-.TP
-.B \-copy all
-Copy all extra markers. This setting preserves miscellaneous markers
-found in the source file, such as JFIF thumbnails and Photoshop settings.
-In some files these extra markers can be sizable.
-.PP
-The default behavior is
-.BR "\-copy comments" .
-(Note: in IJG releases v6 and v6a,
-.B jpegtran
-always did the equivalent of
-.BR "\-copy none" .)
-.PP
-Additional switches recognized by jpegtran are:
-.TP
-.BI \-maxmemory " N"
-Set limit for amount of memory to use in processing large images. Value is
-in thousands of bytes, or millions of bytes if "M" is attached to the
-number. For example,
-.B \-max 4m
-selects 4000000 bytes. If more space is needed, temporary files will be used.
-.TP
-.BI \-outfile " name"
-Send output image to the named file, not to standard output.
-.TP
-.B \-verbose
-Enable debug printout. More
-.BR \-v 's
-give more output. Also, version information is printed at startup.
-.TP
-.B \-debug
-Same as
-.BR \-verbose .
-.SH EXAMPLES
-.LP
-This example converts a baseline JPEG file to progressive form:
-.IP
-.B jpegtran \-progressive
-.I foo.jpg
-.B >
-.I fooprog.jpg
-.PP
-This example rotates an image 90 degrees clockwise, discarding any
-unrotatable edge pixels:
-.IP
-.B jpegtran \-rot 90 -trim
-.I foo.jpg
-.B >
-.I foo90.jpg
-.SH ENVIRONMENT
-.TP
-.B JPEGMEM
-If this environment variable is set, its value is the default memory limit.
-The value is specified as described for the
-.B \-maxmemory
-switch.
-.B JPEGMEM
-overrides the default value specified when the program was compiled, and
-itself is overridden by an explicit
-.BR \-maxmemory .
-.SH SEE ALSO
-.BR cjpeg (1),
-.BR djpeg (1),
-.BR rdjpgcom (1),
-.BR wrjpgcom (1)
-.br
-Wallace, Gregory K. "The JPEG Still Picture Compression Standard",
-Communications of the ACM, April 1991 (vol. 34, no. 4), pp. 30-44.
-.SH AUTHOR
-Independent JPEG Group
-.SH BUGS
-Arithmetic coding is not supported for legal reasons.
-.PP
-The transform options can't transform odd-size images perfectly. Use
-.B \-trim
-if you don't like the results without it.
-.PP
-The entire image is read into memory and then written out again, even in
-cases where this isn't really necessary. Expect swapping on large images,
-especially when using the more complex transform options.
+++ /dev/null
-/*
- * jpegtran.c
- *
- * Copyright (C) 1995-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains a command-line user interface for JPEG transcoding.
- * It is very similar to cjpeg.c, but provides lossless transcoding between
- * different JPEG file formats. It also provides some lossless and sort-of-
- * lossless transformations of JPEG data.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-#include "transupp.h" /* Support routines for jpegtran */
-#include "jversion.h" /* for version message */
-
-#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
-#ifdef __MWERKS__
-#include <SIOUX.h> /* Metrowerks needs this */
-#include <console.h> /* ... and this */
-#endif
-#ifdef THINK_C
-#include <console.h> /* Think declares it here */
-#endif
-#endif
-
-
-/*
- * Argument-parsing code.
- * The switch parser is designed to be useful with DOS-style command line
- * syntax, ie, intermixed switches and file names, where only the switches
- * to the left of a given file name affect processing of that file.
- * The main program in this file doesn't actually use this capability...
- */
-
-
-static const char * progname; /* program name for error messages */
-static char * outfilename; /* for -outfile switch */
-static JCOPY_OPTION copyoption; /* -copy switch */
-static jpeg_transform_info transformoption; /* image transformation options */
-
-
-LOCAL(void)
-usage (void)
-/* complain about bad command line */
-{
- fprintf(stderr, "usage: %s [switches] ", progname);
-#ifdef TWO_FILE_COMMANDLINE
- fprintf(stderr, "inputfile outputfile\n");
-#else
- fprintf(stderr, "[inputfile]\n");
-#endif
-
- fprintf(stderr, "Switches (names may be abbreviated):\n");
- fprintf(stderr, " -copy none Copy no extra markers from source file\n");
- fprintf(stderr, " -copy comments Copy only comment markers (default)\n");
- fprintf(stderr, " -copy all Copy all extra markers\n");
-#ifdef ENTROPY_OPT_SUPPORTED
- fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
-#endif
-#ifdef C_PROGRESSIVE_SUPPORTED
- fprintf(stderr, " -progressive Create progressive JPEG file\n");
-#endif
-#if TRANSFORMS_SUPPORTED
- fprintf(stderr, "Switches for modifying the image:\n");
- fprintf(stderr, " -grayscale Reduce to grayscale (omit color data)\n");
- fprintf(stderr, " -flip [horizontal|vertical] Mirror image (left-right or top-bottom)\n");
- fprintf(stderr, " -rotate [90|180|270] Rotate image (degrees clockwise)\n");
- fprintf(stderr, " -transpose Transpose image\n");
- fprintf(stderr, " -transverse Transverse transpose image\n");
- fprintf(stderr, " -trim Drop non-transformable edge blocks\n");
-#endif /* TRANSFORMS_SUPPORTED */
- fprintf(stderr, "Switches for advanced users:\n");
- fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
- fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
- fprintf(stderr, " -outfile name Specify name for output file\n");
- fprintf(stderr, " -verbose or -debug Emit debug output\n");
- fprintf(stderr, "Switches for wizards:\n");
-#ifdef C_ARITH_CODING_SUPPORTED
- fprintf(stderr, " -arithmetic Use arithmetic coding\n");
-#endif
-#ifdef C_MULTISCAN_FILES_SUPPORTED
- fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
-#endif
- exit(EXIT_FAILURE);
-}
-
-
-LOCAL(void)
-select_transform (JXFORM_CODE transform)
-/* Silly little routine to detect multiple transform options,
- * which we can't handle.
- */
-{
-#if TRANSFORMS_SUPPORTED
- if (transformoption.transform == JXFORM_NONE ||
- transformoption.transform == transform) {
- transformoption.transform = transform;
- } else {
- fprintf(stderr, "%s: can only do one image transformation at a time\n",
- progname);
- usage();
- }
-#else
- fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
- progname);
- exit(EXIT_FAILURE);
-#endif
-}
-
-
-LOCAL(int)
-parse_switches (j_compress_ptr cinfo, int argc, char **argv,
- int last_file_arg_seen, boolean for_real)
-/* Parse optional switches.
- * Returns argv[] index of first file-name argument (== argc if none).
- * Any file names with indexes <= last_file_arg_seen are ignored;
- * they have presumably been processed in a previous iteration.
- * (Pass 0 for last_file_arg_seen on the first or only iteration.)
- * for_real is FALSE on the first (dummy) pass; we may skip any expensive
- * processing.
- */
-{
- int argn;
- char * arg;
- boolean simple_progressive;
- char * scansarg = NULL; /* saves -scans parm if any */
-
- /* Set up default JPEG parameters. */
- simple_progressive = FALSE;
- outfilename = NULL;
- copyoption = JCOPYOPT_DEFAULT;
- transformoption.transform = JXFORM_NONE;
- transformoption.trim = FALSE;
- transformoption.force_grayscale = FALSE;
- cinfo->err->trace_level = 0;
-
- /* Scan command line options, adjust parameters */
-
- for (argn = 1; argn < argc; argn++) {
- arg = argv[argn];
- if (*arg != '-') {
- /* Not a switch, must be a file name argument */
- if (argn <= last_file_arg_seen) {
- outfilename = NULL; /* -outfile applies to just one input file */
- continue; /* ignore this name if previously processed */
- }
- break; /* else done parsing switches */
- }
- arg++; /* advance past switch marker character */
-
- if (keymatch(arg, "arithmetic", 1)) {
- /* Use arithmetic coding. */
-#ifdef C_ARITH_CODING_SUPPORTED
- cinfo->arith_code = TRUE;
-#else
- fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
- progname);
- exit(EXIT_FAILURE);
-#endif
-
- } else if (keymatch(arg, "copy", 1)) {
- /* Select which extra markers to copy. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (keymatch(argv[argn], "none", 1)) {
- copyoption = JCOPYOPT_NONE;
- } else if (keymatch(argv[argn], "comments", 1)) {
- copyoption = JCOPYOPT_COMMENTS;
- } else if (keymatch(argv[argn], "all", 1)) {
- copyoption = JCOPYOPT_ALL;
- } else
- usage();
-
- } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
- /* Enable debug printouts. */
- /* On first -d, print version identification */
- static boolean printed_version = FALSE;
-
- if (! printed_version) {
- fprintf(stderr, "Independent JPEG Group's JPEGTRAN, version %s\n%s\n",
- JVERSION, JCOPYRIGHT);
- printed_version = TRUE;
- }
- cinfo->err->trace_level++;
-
- } else if (keymatch(arg, "flip", 1)) {
- /* Mirror left-right or top-bottom. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (keymatch(argv[argn], "horizontal", 1))
- select_transform(JXFORM_FLIP_H);
- else if (keymatch(argv[argn], "vertical", 1))
- select_transform(JXFORM_FLIP_V);
- else
- usage();
-
- } else if (keymatch(arg, "grayscale", 1) || keymatch(arg, "greyscale",1)) {
- /* Force to grayscale. */
-#if TRANSFORMS_SUPPORTED
- transformoption.force_grayscale = TRUE;
-#else
- select_transform(JXFORM_NONE); /* force an error */
-#endif
-
- } else if (keymatch(arg, "maxmemory", 3)) {
- /* Maximum memory in Kb (or Mb with 'm'). */
- long lval;
- char ch = 'x';
-
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
- usage();
- if (ch == 'm' || ch == 'M')
- lval *= 1000L;
- cinfo->mem->max_memory_to_use = lval * 1000L;
-
- } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
- /* Enable entropy parm optimization. */
-#ifdef ENTROPY_OPT_SUPPORTED
- cinfo->optimize_coding = TRUE;
-#else
- fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
- progname);
- exit(EXIT_FAILURE);
-#endif
-
- } else if (keymatch(arg, "outfile", 4)) {
- /* Set output file name. */
- if (++argn >= argc) /* advance to next argument */
- usage();
- outfilename = argv[argn]; /* save it away for later use */
-
- } else if (keymatch(arg, "progressive", 1)) {
- /* Select simple progressive mode. */
-#ifdef C_PROGRESSIVE_SUPPORTED
- simple_progressive = TRUE;
- /* We must postpone execution until num_components is known. */
-#else
- fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
- progname);
- exit(EXIT_FAILURE);
-#endif
-
- } else if (keymatch(arg, "restart", 1)) {
- /* Restart interval in MCU rows (or in MCUs with 'b'). */
- long lval;
- char ch = 'x';
-
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
- usage();
- if (lval < 0 || lval > 65535L)
- usage();
- if (ch == 'b' || ch == 'B') {
- cinfo->restart_interval = (unsigned int) lval;
- cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
- } else {
- cinfo->restart_in_rows = (int) lval;
- /* restart_interval will be computed during startup */
- }
-
- } else if (keymatch(arg, "rotate", 2)) {
- /* Rotate 90, 180, or 270 degrees (measured clockwise). */
- if (++argn >= argc) /* advance to next argument */
- usage();
- if (keymatch(argv[argn], "90", 2))
- select_transform(JXFORM_ROT_90);
- else if (keymatch(argv[argn], "180", 3))
- select_transform(JXFORM_ROT_180);
- else if (keymatch(argv[argn], "270", 3))
- select_transform(JXFORM_ROT_270);
- else
- usage();
-
- } else if (keymatch(arg, "scans", 1)) {
- /* Set scan script. */
-#ifdef C_MULTISCAN_FILES_SUPPORTED
- if (++argn >= argc) /* advance to next argument */
- usage();
- scansarg = argv[argn];
- /* We must postpone reading the file in case -progressive appears. */
-#else
- fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
- progname);
- exit(EXIT_FAILURE);
-#endif
-
- } else if (keymatch(arg, "transpose", 1)) {
- /* Transpose (across UL-to-LR axis). */
- select_transform(JXFORM_TRANSPOSE);
-
- } else if (keymatch(arg, "transverse", 6)) {
- /* Transverse transpose (across UR-to-LL axis). */
- select_transform(JXFORM_TRANSVERSE);
-
- } else if (keymatch(arg, "trim", 3)) {
- /* Trim off any partial edge MCUs that the transform can't handle. */
- transformoption.trim = TRUE;
-
- } else {
- usage(); /* bogus switch */
- }
- }
-
- /* Post-switch-scanning cleanup */
-
- if (for_real) {
-
-#ifdef C_PROGRESSIVE_SUPPORTED
- if (simple_progressive) /* process -progressive; -scans can override */
- jpeg_simple_progression(cinfo);
-#endif
-
-#ifdef C_MULTISCAN_FILES_SUPPORTED
- if (scansarg != NULL) /* process -scans if it was present */
- if (! read_scan_script(cinfo, scansarg))
- usage();
-#endif
- }
-
- return argn; /* return index of next arg (file name) */
-}
-
-
-/*
- * The main program.
- */
-
-int
-main (int argc, char **argv)
-{
- struct jpeg_decompress_struct srcinfo;
- struct jpeg_compress_struct dstinfo;
- struct jpeg_error_mgr jsrcerr, jdsterr;
-#ifdef PROGRESS_REPORT
- struct cdjpeg_progress_mgr progress;
-#endif
- jvirt_barray_ptr * src_coef_arrays;
- jvirt_barray_ptr * dst_coef_arrays;
- int file_index;
- FILE * input_file;
- FILE * output_file;
-
- /* On Mac, fetch a command line. */
-#ifdef USE_CCOMMAND
- argc = ccommand(&argv);
-#endif
-
- progname = argv[0];
- if (progname == NULL || progname[0] == 0)
- progname = "jpegtran"; /* in case C library doesn't provide it */
-
- /* Initialize the JPEG decompression object with default error handling. */
- srcinfo.err = jpeg_std_error(&jsrcerr);
- jpeg_create_decompress(&srcinfo);
- /* Initialize the JPEG compression object with default error handling. */
- dstinfo.err = jpeg_std_error(&jdsterr);
- jpeg_create_compress(&dstinfo);
-
- /* Now safe to enable signal catcher.
- * Note: we assume only the decompression object will have virtual arrays.
- */
-#ifdef NEED_SIGNAL_CATCHER
- enable_signal_catcher((j_common_ptr) &srcinfo);
-#endif
-
- /* Scan command line to find file names.
- * It is convenient to use just one switch-parsing routine, but the switch
- * values read here are mostly ignored; we will rescan the switches after
- * opening the input file. Also note that most of the switches affect the
- * destination JPEG object, so we parse into that and then copy over what
- * needs to affects the source too.
- */
-
- file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
- jsrcerr.trace_level = jdsterr.trace_level;
- srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
-
-#ifdef TWO_FILE_COMMANDLINE
- /* Must have either -outfile switch or explicit output file name */
- if (outfilename == NULL) {
- if (file_index != argc-2) {
- fprintf(stderr, "%s: must name one input and one output file\n",
- progname);
- usage();
- }
- outfilename = argv[file_index+1];
- } else {
- if (file_index != argc-1) {
- fprintf(stderr, "%s: must name one input and one output file\n",
- progname);
- usage();
- }
- }
-#else
- /* Unix style: expect zero or one file name */
- if (file_index < argc-1) {
- fprintf(stderr, "%s: only one input file\n", progname);
- usage();
- }
-#endif /* TWO_FILE_COMMANDLINE */
-
- /* Open the input file. */
- if (file_index < argc) {
- if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default input file is stdin */
- input_file = read_stdin();
- }
-
- /* Open the output file. */
- if (outfilename != NULL) {
- if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default output file is stdout */
- output_file = write_stdout();
- }
-
-#ifdef PROGRESS_REPORT
- start_progress_monitor((j_common_ptr) &dstinfo, &progress);
-#endif
-
- /* Specify data source for decompression */
- jpeg_stdio_src(&srcinfo, input_file);
-
- /* Enable saving of extra markers that we want to copy */
- jcopy_markers_setup(&srcinfo, copyoption);
-
- /* Read file header */
- (void) jpeg_read_header(&srcinfo, TRUE);
-
- /* Any space needed by a transform option must be requested before
- * jpeg_read_coefficients so that memory allocation will be done right.
- */
-#if TRANSFORMS_SUPPORTED
- jtransform_request_workspace(&srcinfo, &transformoption);
-#endif
-
- /* Read source file as DCT coefficients */
- src_coef_arrays = jpeg_read_coefficients(&srcinfo);
-
- /* Initialize destination compression parameters from source values */
- jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
-
- /* Adjust destination parameters if required by transform options;
- * also find out which set of coefficient arrays will hold the output.
- */
-#if TRANSFORMS_SUPPORTED
- dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
- src_coef_arrays,
- &transformoption);
-#else
- dst_coef_arrays = src_coef_arrays;
-#endif
-
- /* Adjust default compression parameters by re-parsing the options */
- file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
-
- /* Specify data destination for compression */
- jpeg_stdio_dest(&dstinfo, output_file);
-
- /* Start compressor (note no image data is actually written here) */
- jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
-
- /* Copy to the output file any extra markers that we want to preserve */
- jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
-
- /* Execute image transformation, if any */
-#if TRANSFORMS_SUPPORTED
- jtransform_execute_transformation(&srcinfo, &dstinfo,
- src_coef_arrays,
- &transformoption);
-#endif
-
- /* Finish compression and release memory */
- jpeg_finish_compress(&dstinfo);
- jpeg_destroy_compress(&dstinfo);
- (void) jpeg_finish_decompress(&srcinfo);
- jpeg_destroy_decompress(&srcinfo);
-
- /* Close files, if we opened them */
- if (input_file != stdin)
- fclose(input_file);
- if (output_file != stdout)
- fclose(output_file);
-
-#ifdef PROGRESS_REPORT
- end_progress_monitor((j_common_ptr) &dstinfo);
-#endif
-
- /* All done. */
- exit(jsrcerr.num_warnings + jdsterr.num_warnings ?EXIT_WARNING:EXIT_SUCCESS);
- return 0; /* suppress no-return-value warnings */
-}
+++ /dev/null
-USING THE IJG JPEG LIBRARY
-
-Copyright (C) 1994-1998, Thomas G. Lane.
-This file is part of the Independent JPEG Group's software.
-For conditions of distribution and use, see the accompanying README file.
-
-
-This file describes how to use the IJG JPEG library within an application
-program. Read it if you want to write a program that uses the library.
-
-The file example.c provides heavily commented skeleton code for calling the
-JPEG library. Also see jpeglib.h (the include file to be used by application
-programs) for full details about data structures and function parameter lists.
-The library source code, of course, is the ultimate reference.
-
-Note that there have been *major* changes from the application interface
-presented by IJG version 4 and earlier versions. The old design had several
-inherent limitations, and it had accumulated a lot of cruft as we added
-features while trying to minimize application-interface changes. We have
-sacrificed backward compatibility in the version 5 rewrite, but we think the
-improvements justify this.
-
-
-TABLE OF CONTENTS
------------------
-
-Overview:
- Functions provided by the library
- Outline of typical usage
-Basic library usage:
- Data formats
- Compression details
- Decompression details
- Mechanics of usage: include files, linking, etc
-Advanced features:
- Compression parameter selection
- Decompression parameter selection
- Special color spaces
- Error handling
- Compressed data handling (source and destination managers)
- I/O suspension
- Progressive JPEG support
- Buffered-image mode
- Abbreviated datastreams and multiple images
- Special markers
- Raw (downsampled) image data
- Really raw data: DCT coefficients
- Progress monitoring
- Memory management
- Memory usage
- Library compile-time options
- Portability considerations
- Notes for MS-DOS implementors
-
-You should read at least the overview and basic usage sections before trying
-to program with the library. The sections on advanced features can be read
-if and when you need them.
-
-
-OVERVIEW
-========
-
-Functions provided by the library
----------------------------------
-
-The IJG JPEG library provides C code to read and write JPEG-compressed image
-files. The surrounding application program receives or supplies image data a
-scanline at a time, using a straightforward uncompressed image format. All
-details of color conversion and other preprocessing/postprocessing can be
-handled by the library.
-
-The library includes a substantial amount of code that is not covered by the
-JPEG standard but is necessary for typical applications of JPEG. These
-functions preprocess the image before JPEG compression or postprocess it after
-decompression. They include colorspace conversion, downsampling/upsampling,
-and color quantization. The application indirectly selects use of this code
-by specifying the format in which it wishes to supply or receive image data.
-For example, if colormapped output is requested, then the decompression
-library automatically invokes color quantization.
-
-A wide range of quality vs. speed tradeoffs are possible in JPEG processing,
-and even more so in decompression postprocessing. The decompression library
-provides multiple implementations that cover most of the useful tradeoffs,
-ranging from very-high-quality down to fast-preview operation. On the
-compression side we have generally not provided low-quality choices, since
-compression is normally less time-critical. It should be understood that the
-low-quality modes may not meet the JPEG standard's accuracy requirements;
-nonetheless, they are useful for viewers.
-
-A word about functions *not* provided by the library. We handle a subset of
-the ISO JPEG standard; most baseline, extended-sequential, and progressive
-JPEG processes are supported. (Our subset includes all features now in common
-use.) Unsupported ISO options include:
- * Hierarchical storage
- * Lossless JPEG
- * Arithmetic entropy coding (unsupported for legal reasons)
- * DNL marker
- * Nonintegral subsampling ratios
-We support both 8- and 12-bit data precision, but this is a compile-time
-choice rather than a run-time choice; hence it is difficult to use both
-precisions in a single application.
-
-By itself, the library handles only interchange JPEG datastreams --- in
-particular the widely used JFIF file format. The library can be used by
-surrounding code to process interchange or abbreviated JPEG datastreams that
-are embedded in more complex file formats. (For example, this library is
-used by the free LIBTIFF library to support JPEG compression in TIFF.)
-
-
-Outline of typical usage
-------------------------
-
-The rough outline of a JPEG compression operation is:
-
- Allocate and initialize a JPEG compression object
- Specify the destination for the compressed data (eg, a file)
- Set parameters for compression, including image size & colorspace
- jpeg_start_compress(...);
- while (scan lines remain to be written)
- jpeg_write_scanlines(...);
- jpeg_finish_compress(...);
- Release the JPEG compression object
-
-A JPEG compression object holds parameters and working state for the JPEG
-library. We make creation/destruction of the object separate from starting
-or finishing compression of an image; the same object can be re-used for a
-series of image compression operations. This makes it easy to re-use the
-same parameter settings for a sequence of images. Re-use of a JPEG object
-also has important implications for processing abbreviated JPEG datastreams,
-as discussed later.
-
-The image data to be compressed is supplied to jpeg_write_scanlines() from
-in-memory buffers. If the application is doing file-to-file compression,
-reading image data from the source file is the application's responsibility.
-The library emits compressed data by calling a "data destination manager",
-which typically will write the data into a file; but the application can
-provide its own destination manager to do something else.
-
-Similarly, the rough outline of a JPEG decompression operation is:
-
- Allocate and initialize a JPEG decompression object
- Specify the source of the compressed data (eg, a file)
- Call jpeg_read_header() to obtain image info
- Set parameters for decompression
- jpeg_start_decompress(...);
- while (scan lines remain to be read)
- jpeg_read_scanlines(...);
- jpeg_finish_decompress(...);
- Release the JPEG decompression object
-
-This is comparable to the compression outline except that reading the
-datastream header is a separate step. This is helpful because information
-about the image's size, colorspace, etc is available when the application
-selects decompression parameters. For example, the application can choose an
-output scaling ratio that will fit the image into the available screen size.
-
-The decompression library obtains compressed data by calling a data source
-manager, which typically will read the data from a file; but other behaviors
-can be obtained with a custom source manager. Decompressed data is delivered
-into in-memory buffers passed to jpeg_read_scanlines().
-
-It is possible to abort an incomplete compression or decompression operation
-by calling jpeg_abort(); or, if you do not need to retain the JPEG object,
-simply release it by calling jpeg_destroy().
-
-JPEG compression and decompression objects are two separate struct types.
-However, they share some common fields, and certain routines such as
-jpeg_destroy() can work on either type of object.
-
-The JPEG library has no static variables: all state is in the compression
-or decompression object. Therefore it is possible to process multiple
-compression and decompression operations concurrently, using multiple JPEG
-objects.
-
-Both compression and decompression can be done in an incremental memory-to-
-memory fashion, if suitable source/destination managers are used. See the
-section on "I/O suspension" for more details.
-
-
-BASIC LIBRARY USAGE
-===================
-
-Data formats
-------------
-
-Before diving into procedural details, it is helpful to understand the
-image data format that the JPEG library expects or returns.
-
-The standard input image format is a rectangular array of pixels, with each
-pixel having the same number of "component" or "sample" values (color
-channels). You must specify how many components there are and the colorspace
-interpretation of the components. Most applications will use RGB data
-(three components per pixel) or grayscale data (one component per pixel).
-PLEASE NOTE THAT RGB DATA IS THREE SAMPLES PER PIXEL, GRAYSCALE ONLY ONE.
-A remarkable number of people manage to miss this, only to find that their
-programs don't work with grayscale JPEG files.
-
-There is no provision for colormapped input. JPEG files are always full-color
-or full grayscale (or sometimes another colorspace such as CMYK). You can
-feed in a colormapped image by expanding it to full-color format. However
-JPEG often doesn't work very well with source data that has been colormapped,
-because of dithering noise. This is discussed in more detail in the JPEG FAQ
-and the other references mentioned in the README file.
-
-Pixels are stored by scanlines, with each scanline running from left to
-right. The component values for each pixel are adjacent in the row; for
-example, R,G,B,R,G,B,R,G,B,... for 24-bit RGB color. Each scanline is an
-array of data type JSAMPLE --- which is typically "unsigned char", unless
-you've changed jmorecfg.h. (You can also change the RGB pixel layout, say
-to B,G,R order, by modifying jmorecfg.h. But see the restrictions listed in
-that file before doing so.)
-
-A 2-D array of pixels is formed by making a list of pointers to the starts of
-scanlines; so the scanlines need not be physically adjacent in memory. Even
-if you process just one scanline at a time, you must make a one-element
-pointer array to conform to this structure. Pointers to JSAMPLE rows are of
-type JSAMPROW, and the pointer to the pointer array is of type JSAMPARRAY.
-
-The library accepts or supplies one or more complete scanlines per call.
-It is not possible to process part of a row at a time. Scanlines are always
-processed top-to-bottom. You can process an entire image in one call if you
-have it all in memory, but usually it's simplest to process one scanline at
-a time.
-
-For best results, source data values should have the precision specified by
-BITS_IN_JSAMPLE (normally 8 bits). For instance, if you choose to compress
-data that's only 6 bits/channel, you should left-justify each value in a
-byte before passing it to the compressor. If you need to compress data
-that has more than 8 bits/channel, compile with BITS_IN_JSAMPLE = 12.
-(See "Library compile-time options", later.)
-
-
-The data format returned by the decompressor is the same in all details,
-except that colormapped output is supported. (Again, a JPEG file is never
-colormapped. But you can ask the decompressor to perform on-the-fly color
-quantization to deliver colormapped output.) If you request colormapped
-output then the returned data array contains a single JSAMPLE per pixel;
-its value is an index into a color map. The color map is represented as
-a 2-D JSAMPARRAY in which each row holds the values of one color component,
-that is, colormap[i][j] is the value of the i'th color component for pixel
-value (map index) j. Note that since the colormap indexes are stored in
-JSAMPLEs, the maximum number of colors is limited by the size of JSAMPLE
-(ie, at most 256 colors for an 8-bit JPEG library).
-
-
-Compression details
--------------------
-
-Here we revisit the JPEG compression outline given in the overview.
-
-1. Allocate and initialize a JPEG compression object.
-
-A JPEG compression object is a "struct jpeg_compress_struct". (It also has
-a bunch of subsidiary structures which are allocated via malloc(), but the
-application doesn't control those directly.) This struct can be just a local
-variable in the calling routine, if a single routine is going to execute the
-whole JPEG compression sequence. Otherwise it can be static or allocated
-from malloc().
-
-You will also need a structure representing a JPEG error handler. The part
-of this that the library cares about is a "struct jpeg_error_mgr". If you
-are providing your own error handler, you'll typically want to embed the
-jpeg_error_mgr struct in a larger structure; this is discussed later under
-"Error handling". For now we'll assume you are just using the default error
-handler. The default error handler will print JPEG error/warning messages
-on stderr, and it will call exit() if a fatal error occurs.
-
-You must initialize the error handler structure, store a pointer to it into
-the JPEG object's "err" field, and then call jpeg_create_compress() to
-initialize the rest of the JPEG object.
-
-Typical code for this step, if you are using the default error handler, is
-
- struct jpeg_compress_struct cinfo;
- struct jpeg_error_mgr jerr;
- ...
- cinfo.err = jpeg_std_error(&jerr);
- jpeg_create_compress(&cinfo);
-
-jpeg_create_compress allocates a small amount of memory, so it could fail
-if you are out of memory. In that case it will exit via the error handler;
-that's why the error handler must be initialized first.
-
-
-2. Specify the destination for the compressed data (eg, a file).
-
-As previously mentioned, the JPEG library delivers compressed data to a
-"data destination" module. The library includes one data destination
-module which knows how to write to a stdio stream. You can use your own
-destination module if you want to do something else, as discussed later.
-
-If you use the standard destination module, you must open the target stdio
-stream beforehand. Typical code for this step looks like:
-
- FILE * outfile;
- ...
- if ((outfile = fopen(filename, "wb")) == NULL) {
- fprintf(stderr, "can't open %s\n", filename);
- exit(1);
- }
- jpeg_stdio_dest(&cinfo, outfile);
-
-where the last line invokes the standard destination module.
-
-WARNING: it is critical that the binary compressed data be delivered to the
-output file unchanged. On non-Unix systems the stdio library may perform
-newline translation or otherwise corrupt binary data. To suppress this
-behavior, you may need to use a "b" option to fopen (as shown above), or use
-setmode() or another routine to put the stdio stream in binary mode. See
-cjpeg.c and djpeg.c for code that has been found to work on many systems.
-
-You can select the data destination after setting other parameters (step 3),
-if that's more convenient. You may not change the destination between
-calling jpeg_start_compress() and jpeg_finish_compress().
-
-
-3. Set parameters for compression, including image size & colorspace.
-
-You must supply information about the source image by setting the following
-fields in the JPEG object (cinfo structure):
-
- image_width Width of image, in pixels
- image_height Height of image, in pixels
- input_components Number of color channels (samples per pixel)
- in_color_space Color space of source image
-
-The image dimensions are, hopefully, obvious. JPEG supports image dimensions
-of 1 to 64K pixels in either direction. The input color space is typically
-RGB or grayscale, and input_components is 3 or 1 accordingly. (See "Special
-color spaces", later, for more info.) The in_color_space field must be
-assigned one of the J_COLOR_SPACE enum constants, typically JCS_RGB or
-JCS_GRAYSCALE.
-
-JPEG has a large number of compression parameters that determine how the
-image is encoded. Most applications don't need or want to know about all
-these parameters. You can set all the parameters to reasonable defaults by
-calling jpeg_set_defaults(); then, if there are particular values you want
-to change, you can do so after that. The "Compression parameter selection"
-section tells about all the parameters.
-
-You must set in_color_space correctly before calling jpeg_set_defaults(),
-because the defaults depend on the source image colorspace. However the
-other three source image parameters need not be valid until you call
-jpeg_start_compress(). There's no harm in calling jpeg_set_defaults() more
-than once, if that happens to be convenient.
-
-Typical code for a 24-bit RGB source image is
-
- cinfo.image_width = Width; /* image width and height, in pixels */
- cinfo.image_height = Height;
- cinfo.input_components = 3; /* # of color components per pixel */
- cinfo.in_color_space = JCS_RGB; /* colorspace of input image */
-
- jpeg_set_defaults(&cinfo);
- /* Make optional parameter settings here */
-
-
-4. jpeg_start_compress(...);
-
-After you have established the data destination and set all the necessary
-source image info and other parameters, call jpeg_start_compress() to begin
-a compression cycle. This will initialize internal state, allocate working
-storage, and emit the first few bytes of the JPEG datastream header.
-
-Typical code:
-
- jpeg_start_compress(&cinfo, TRUE);
-
-The "TRUE" parameter ensures that a complete JPEG interchange datastream
-will be written. This is appropriate in most cases. If you think you might
-want to use an abbreviated datastream, read the section on abbreviated
-datastreams, below.
-
-Once you have called jpeg_start_compress(), you may not alter any JPEG
-parameters or other fields of the JPEG object until you have completed
-the compression cycle.
-
-
-5. while (scan lines remain to be written)
- jpeg_write_scanlines(...);
-
-Now write all the required image data by calling jpeg_write_scanlines()
-one or more times. You can pass one or more scanlines in each call, up
-to the total image height. In most applications it is convenient to pass
-just one or a few scanlines at a time. The expected format for the passed
-data is discussed under "Data formats", above.
-
-Image data should be written in top-to-bottom scanline order. The JPEG spec
-contains some weasel wording about how top and bottom are application-defined
-terms (a curious interpretation of the English language...) but if you want
-your files to be compatible with everyone else's, you WILL use top-to-bottom
-order. If the source data must be read in bottom-to-top order, you can use
-the JPEG library's virtual array mechanism to invert the data efficiently.
-Examples of this can be found in the sample application cjpeg.
-
-The library maintains a count of the number of scanlines written so far
-in the next_scanline field of the JPEG object. Usually you can just use
-this variable as the loop counter, so that the loop test looks like
-"while (cinfo.next_scanline < cinfo.image_height)".
-
-Code for this step depends heavily on the way that you store the source data.
-example.c shows the following code for the case of a full-size 2-D source
-array containing 3-byte RGB pixels:
-
- JSAMPROW row_pointer[1]; /* pointer to a single row */
- int row_stride; /* physical row width in buffer */
-
- row_stride = image_width * 3; /* JSAMPLEs per row in image_buffer */
-
- while (cinfo.next_scanline < cinfo.image_height) {
- row_pointer[0] = & image_buffer[cinfo.next_scanline * row_stride];
- jpeg_write_scanlines(&cinfo, row_pointer, 1);
- }
-
-jpeg_write_scanlines() returns the number of scanlines actually written.
-This will normally be equal to the number passed in, so you can usually
-ignore the return value. It is different in just two cases:
- * If you try to write more scanlines than the declared image height,
- the additional scanlines are ignored.
- * If you use a suspending data destination manager, output buffer overrun
- will cause the compressor to return before accepting all the passed lines.
- This feature is discussed under "I/O suspension", below. The normal
- stdio destination manager will NOT cause this to happen.
-In any case, the return value is the same as the change in the value of
-next_scanline.
-
-
-6. jpeg_finish_compress(...);
-
-After all the image data has been written, call jpeg_finish_compress() to
-complete the compression cycle. This step is ESSENTIAL to ensure that the
-last bufferload of data is written to the data destination.
-jpeg_finish_compress() also releases working memory associated with the JPEG
-object.
-
-Typical code:
-
- jpeg_finish_compress(&cinfo);
-
-If using the stdio destination manager, don't forget to close the output
-stdio stream (if necessary) afterwards.
-
-If you have requested a multi-pass operating mode, such as Huffman code
-optimization, jpeg_finish_compress() will perform the additional passes using
-data buffered by the first pass. In this case jpeg_finish_compress() may take
-quite a while to complete. With the default compression parameters, this will
-not happen.
-
-It is an error to call jpeg_finish_compress() before writing the necessary
-total number of scanlines. If you wish to abort compression, call
-jpeg_abort() as discussed below.
-
-After completing a compression cycle, you may dispose of the JPEG object
-as discussed next, or you may use it to compress another image. In that case
-return to step 2, 3, or 4 as appropriate. If you do not change the
-destination manager, the new datastream will be written to the same target.
-If you do not change any JPEG parameters, the new datastream will be written
-with the same parameters as before. Note that you can change the input image
-dimensions freely between cycles, but if you change the input colorspace, you
-should call jpeg_set_defaults() to adjust for the new colorspace; and then
-you'll need to repeat all of step 3.
-
-
-7. Release the JPEG compression object.
-
-When you are done with a JPEG compression object, destroy it by calling
-jpeg_destroy_compress(). This will free all subsidiary memory (regardless of
-the previous state of the object). Or you can call jpeg_destroy(), which
-works for either compression or decompression objects --- this may be more
-convenient if you are sharing code between compression and decompression
-cases. (Actually, these routines are equivalent except for the declared type
-of the passed pointer. To avoid gripes from ANSI C compilers, jpeg_destroy()
-should be passed a j_common_ptr.)
-
-If you allocated the jpeg_compress_struct structure from malloc(), freeing
-it is your responsibility --- jpeg_destroy() won't. Ditto for the error
-handler structure.
-
-Typical code:
-
- jpeg_destroy_compress(&cinfo);
-
-
-8. Aborting.
-
-If you decide to abort a compression cycle before finishing, you can clean up
-in either of two ways:
-
-* If you don't need the JPEG object any more, just call
- jpeg_destroy_compress() or jpeg_destroy() to release memory. This is
- legitimate at any point after calling jpeg_create_compress() --- in fact,
- it's safe even if jpeg_create_compress() fails.
-
-* If you want to re-use the JPEG object, call jpeg_abort_compress(), or call
- jpeg_abort() which works on both compression and decompression objects.
- This will return the object to an idle state, releasing any working memory.
- jpeg_abort() is allowed at any time after successful object creation.
-
-Note that cleaning up the data destination, if required, is your
-responsibility; neither of these routines will call term_destination().
-(See "Compressed data handling", below, for more about that.)
-
-jpeg_destroy() and jpeg_abort() are the only safe calls to make on a JPEG
-object that has reported an error by calling error_exit (see "Error handling"
-for more info). The internal state of such an object is likely to be out of
-whack. Either of these two routines will return the object to a known state.
-
-
-Decompression details
----------------------
-
-Here we revisit the JPEG decompression outline given in the overview.
-
-1. Allocate and initialize a JPEG decompression object.
-
-This is just like initialization for compression, as discussed above,
-except that the object is a "struct jpeg_decompress_struct" and you
-call jpeg_create_decompress(). Error handling is exactly the same.
-
-Typical code:
-
- struct jpeg_decompress_struct cinfo;
- struct jpeg_error_mgr jerr;
- ...
- cinfo.err = jpeg_std_error(&jerr);
- jpeg_create_decompress(&cinfo);
-
-(Both here and in the IJG code, we usually use variable name "cinfo" for
-both compression and decompression objects.)
-
-
-2. Specify the source of the compressed data (eg, a file).
-
-As previously mentioned, the JPEG library reads compressed data from a "data
-source" module. The library includes one data source module which knows how
-to read from a stdio stream. You can use your own source module if you want
-to do something else, as discussed later.
-
-If you use the standard source module, you must open the source stdio stream
-beforehand. Typical code for this step looks like:
-
- FILE * infile;
- ...
- if ((infile = fopen(filename, "rb")) == NULL) {
- fprintf(stderr, "can't open %s\n", filename);
- exit(1);
- }
- jpeg_stdio_src(&cinfo, infile);
-
-where the last line invokes the standard source module.
-
-WARNING: it is critical that the binary compressed data be read unchanged.
-On non-Unix systems the stdio library may perform newline translation or
-otherwise corrupt binary data. To suppress this behavior, you may need to use
-a "b" option to fopen (as shown above), or use setmode() or another routine to
-put the stdio stream in binary mode. See cjpeg.c and djpeg.c for code that
-has been found to work on many systems.
-
-You may not change the data source between calling jpeg_read_header() and
-jpeg_finish_decompress(). If you wish to read a series of JPEG images from
-a single source file, you should repeat the jpeg_read_header() to
-jpeg_finish_decompress() sequence without reinitializing either the JPEG
-object or the data source module; this prevents buffered input data from
-being discarded.
-
-
-3. Call jpeg_read_header() to obtain image info.
-
-Typical code for this step is just
-
- jpeg_read_header(&cinfo, TRUE);
-
-This will read the source datastream header markers, up to the beginning
-of the compressed data proper. On return, the image dimensions and other
-info have been stored in the JPEG object. The application may wish to
-consult this information before selecting decompression parameters.
-
-More complex code is necessary if
- * A suspending data source is used --- in that case jpeg_read_header()
- may return before it has read all the header data. See "I/O suspension",
- below. The normal stdio source manager will NOT cause this to happen.
- * Abbreviated JPEG files are to be processed --- see the section on
- abbreviated datastreams. Standard applications that deal only in
- interchange JPEG files need not be concerned with this case either.
-
-It is permissible to stop at this point if you just wanted to find out the
-image dimensions and other header info for a JPEG file. In that case,
-call jpeg_destroy() when you are done with the JPEG object, or call
-jpeg_abort() to return it to an idle state before selecting a new data
-source and reading another header.
-
-
-4. Set parameters for decompression.
-
-jpeg_read_header() sets appropriate default decompression parameters based on
-the properties of the image (in particular, its colorspace). However, you
-may well want to alter these defaults before beginning the decompression.
-For example, the default is to produce full color output from a color file.
-If you want colormapped output you must ask for it. Other options allow the
-returned image to be scaled and allow various speed/quality tradeoffs to be
-selected. "Decompression parameter selection", below, gives details.
-
-If the defaults are appropriate, nothing need be done at this step.
-
-Note that all default values are set by each call to jpeg_read_header().
-If you reuse a decompression object, you cannot expect your parameter
-settings to be preserved across cycles, as you can for compression.
-You must set desired parameter values each time.
-
-
-5. jpeg_start_decompress(...);
-
-Once the parameter values are satisfactory, call jpeg_start_decompress() to
-begin decompression. This will initialize internal state, allocate working
-memory, and prepare for returning data.
-
-Typical code is just
-
- jpeg_start_decompress(&cinfo);
-
-If you have requested a multi-pass operating mode, such as 2-pass color
-quantization, jpeg_start_decompress() will do everything needed before data
-output can begin. In this case jpeg_start_decompress() may take quite a while
-to complete. With a single-scan (non progressive) JPEG file and default
-decompression parameters, this will not happen; jpeg_start_decompress() will
-return quickly.
-
-After this call, the final output image dimensions, including any requested
-scaling, are available in the JPEG object; so is the selected colormap, if
-colormapped output has been requested. Useful fields include
-
- output_width image width and height, as scaled
- output_height
- out_color_components # of color components in out_color_space
- output_components # of color components returned per pixel
- colormap the selected colormap, if any
- actual_number_of_colors number of entries in colormap
-
-output_components is 1 (a colormap index) when quantizing colors; otherwise it
-equals out_color_components. It is the number of JSAMPLE values that will be
-emitted per pixel in the output arrays.
-
-Typically you will need to allocate data buffers to hold the incoming image.
-You will need output_width * output_components JSAMPLEs per scanline in your
-output buffer, and a total of output_height scanlines will be returned.
-
-Note: if you are using the JPEG library's internal memory manager to allocate
-data buffers (as djpeg does), then the manager's protocol requires that you
-request large buffers *before* calling jpeg_start_decompress(). This is a
-little tricky since the output_XXX fields are not normally valid then. You
-can make them valid by calling jpeg_calc_output_dimensions() after setting the
-relevant parameters (scaling, output color space, and quantization flag).
-
-
-6. while (scan lines remain to be read)
- jpeg_read_scanlines(...);
-
-Now you can read the decompressed image data by calling jpeg_read_scanlines()
-one or more times. At each call, you pass in the maximum number of scanlines
-to be read (ie, the height of your working buffer); jpeg_read_scanlines()
-will return up to that many lines. The return value is the number of lines
-actually read. The format of the returned data is discussed under "Data
-formats", above. Don't forget that grayscale and color JPEGs will return
-different data formats!
-
-Image data is returned in top-to-bottom scanline order. If you must write
-out the image in bottom-to-top order, you can use the JPEG library's virtual
-array mechanism to invert the data efficiently. Examples of this can be
-found in the sample application djpeg.
-
-The library maintains a count of the number of scanlines returned so far
-in the output_scanline field of the JPEG object. Usually you can just use
-this variable as the loop counter, so that the loop test looks like
-"while (cinfo.output_scanline < cinfo.output_height)". (Note that the test
-should NOT be against image_height, unless you never use scaling. The
-image_height field is the height of the original unscaled image.)
-The return value always equals the change in the value of output_scanline.
-
-If you don't use a suspending data source, it is safe to assume that
-jpeg_read_scanlines() reads at least one scanline per call, until the
-bottom of the image has been reached.
-
-If you use a buffer larger than one scanline, it is NOT safe to assume that
-jpeg_read_scanlines() fills it. (The current implementation returns only a
-few scanlines per call, no matter how large a buffer you pass.) So you must
-always provide a loop that calls jpeg_read_scanlines() repeatedly until the
-whole image has been read.
-
-
-7. jpeg_finish_decompress(...);
-
-After all the image data has been read, call jpeg_finish_decompress() to
-complete the decompression cycle. This causes working memory associated
-with the JPEG object to be released.
-
-Typical code:
-
- jpeg_finish_decompress(&cinfo);
-
-If using the stdio source manager, don't forget to close the source stdio
-stream if necessary.
-
-It is an error to call jpeg_finish_decompress() before reading the correct
-total number of scanlines. If you wish to abort decompression, call
-jpeg_abort() as discussed below.
-
-After completing a decompression cycle, you may dispose of the JPEG object as
-discussed next, or you may use it to decompress another image. In that case
-return to step 2 or 3 as appropriate. If you do not change the source
-manager, the next image will be read from the same source.
-
-
-8. Release the JPEG decompression object.
-
-When you are done with a JPEG decompression object, destroy it by calling
-jpeg_destroy_decompress() or jpeg_destroy(). The previous discussion of
-destroying compression objects applies here too.
-
-Typical code:
-
- jpeg_destroy_decompress(&cinfo);
-
-
-9. Aborting.
-
-You can abort a decompression cycle by calling jpeg_destroy_decompress() or
-jpeg_destroy() if you don't need the JPEG object any more, or
-jpeg_abort_decompress() or jpeg_abort() if you want to reuse the object.
-The previous discussion of aborting compression cycles applies here too.
-
-
-Mechanics of usage: include files, linking, etc
------------------------------------------------
-
-Applications using the JPEG library should include the header file jpeglib.h
-to obtain declarations of data types and routines. Before including
-jpeglib.h, include system headers that define at least the typedefs FILE and
-size_t. On ANSI-conforming systems, including <stdio.h> is sufficient; on
-older Unix systems, you may need <sys/types.h> to define size_t.
-
-If the application needs to refer to individual JPEG library error codes, also
-include jerror.h to define those symbols.
-
-jpeglib.h indirectly includes the files jconfig.h and jmorecfg.h. If you are
-installing the JPEG header files in a system directory, you will want to
-install all four files: jpeglib.h, jerror.h, jconfig.h, jmorecfg.h.
-
-The most convenient way to include the JPEG code into your executable program
-is to prepare a library file ("libjpeg.a", or a corresponding name on non-Unix
-machines) and reference it at your link step. If you use only half of the
-library (only compression or only decompression), only that much code will be
-included from the library, unless your linker is hopelessly brain-damaged.
-The supplied makefiles build libjpeg.a automatically (see install.doc).
-
-While you can build the JPEG library as a shared library if the whim strikes
-you, we don't really recommend it. The trouble with shared libraries is that
-at some point you'll probably try to substitute a new version of the library
-without recompiling the calling applications. That generally doesn't work
-because the parameter struct declarations usually change with each new
-version. In other words, the library's API is *not* guaranteed binary
-compatible across versions; we only try to ensure source-code compatibility.
-(In hindsight, it might have been smarter to hide the parameter structs from
-applications and introduce a ton of access functions instead. Too late now,
-however.)
-
-On some systems your application may need to set up a signal handler to ensure
-that temporary files are deleted if the program is interrupted. This is most
-critical if you are on MS-DOS and use the jmemdos.c memory manager back end;
-it will try to grab extended memory for temp files, and that space will NOT be
-freed automatically. See cjpeg.c or djpeg.c for an example signal handler.
-
-It may be worth pointing out that the core JPEG library does not actually
-require the stdio library: only the default source/destination managers and
-error handler need it. You can use the library in a stdio-less environment
-if you replace those modules and use jmemnobs.c (or another memory manager of
-your own devising). More info about the minimum system library requirements
-may be found in jinclude.h.
-
-
-ADVANCED FEATURES
-=================
-
-Compression parameter selection
--------------------------------
-
-This section describes all the optional parameters you can set for JPEG
-compression, as well as the "helper" routines provided to assist in this
-task. Proper setting of some parameters requires detailed understanding
-of the JPEG standard; if you don't know what a parameter is for, it's best
-not to mess with it! See REFERENCES in the README file for pointers to
-more info about JPEG.
-
-It's a good idea to call jpeg_set_defaults() first, even if you plan to set
-all the parameters; that way your code is more likely to work with future JPEG
-libraries that have additional parameters. For the same reason, we recommend
-you use a helper routine where one is provided, in preference to twiddling
-cinfo fields directly.
-
-The helper routines are:
-
-jpeg_set_defaults (j_compress_ptr cinfo)
- This routine sets all JPEG parameters to reasonable defaults, using
- only the input image's color space (field in_color_space, which must
- already be set in cinfo). Many applications will only need to use
- this routine and perhaps jpeg_set_quality().
-
-jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace)
- Sets the JPEG file's colorspace (field jpeg_color_space) as specified,
- and sets other color-space-dependent parameters appropriately. See
- "Special color spaces", below, before using this. A large number of
- parameters, including all per-component parameters, are set by this
- routine; if you want to twiddle individual parameters you should call
- jpeg_set_colorspace() before rather than after.
-
-jpeg_default_colorspace (j_compress_ptr cinfo)
- Selects an appropriate JPEG colorspace based on cinfo->in_color_space,
- and calls jpeg_set_colorspace(). This is actually a subroutine of
- jpeg_set_defaults(). It's broken out in case you want to change
- just the colorspace-dependent JPEG parameters.
-
-jpeg_set_quality (j_compress_ptr cinfo, int quality, boolean force_baseline)
- Constructs JPEG quantization tables appropriate for the indicated
- quality setting. The quality value is expressed on the 0..100 scale
- recommended by IJG (cjpeg's "-quality" switch uses this routine).
- Note that the exact mapping from quality values to tables may change
- in future IJG releases as more is learned about DCT quantization.
- If the force_baseline parameter is TRUE, then the quantization table
- entries are constrained to the range 1..255 for full JPEG baseline
- compatibility. In the current implementation, this only makes a
- difference for quality settings below 25, and it effectively prevents
- very small/low quality files from being generated. The IJG decoder
- is capable of reading the non-baseline files generated at low quality
- settings when force_baseline is FALSE, but other decoders may not be.
-
-jpeg_set_linear_quality (j_compress_ptr cinfo, int scale_factor,
- boolean force_baseline)
- Same as jpeg_set_quality() except that the generated tables are the
- sample tables given in the JPEC spec section K.1, multiplied by the
- specified scale factor (which is expressed as a percentage; thus
- scale_factor = 100 reproduces the spec's tables). Note that larger
- scale factors give lower quality. This entry point is useful for
- conforming to the Adobe PostScript DCT conventions, but we do not
- recommend linear scaling as a user-visible quality scale otherwise.
- force_baseline again constrains the computed table entries to 1..255.
-
-int jpeg_quality_scaling (int quality)
- Converts a value on the IJG-recommended quality scale to a linear
- scaling percentage. Note that this routine may change or go away
- in future releases --- IJG may choose to adopt a scaling method that
- can't be expressed as a simple scalar multiplier, in which case the
- premise of this routine collapses. Caveat user.
-
-jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl,
- const unsigned int *basic_table,
- int scale_factor, boolean force_baseline)
- Allows an arbitrary quantization table to be created. which_tbl
- indicates which table slot to fill. basic_table points to an array
- of 64 unsigned ints given in normal array order. These values are
- multiplied by scale_factor/100 and then clamped to the range 1..65535
- (or to 1..255 if force_baseline is TRUE).
- CAUTION: prior to library version 6a, jpeg_add_quant_table expected
- the basic table to be given in JPEG zigzag order. If you need to
- write code that works with either older or newer versions of this
- routine, you must check the library version number. Something like
- "#if JPEG_LIB_VERSION >= 61" is the right test.
-
-jpeg_simple_progression (j_compress_ptr cinfo)
- Generates a default scan script for writing a progressive-JPEG file.
- This is the recommended method of creating a progressive file,
- unless you want to make a custom scan sequence. You must ensure that
- the JPEG color space is set correctly before calling this routine.
-
-
-Compression parameters (cinfo fields) include:
-
-J_DCT_METHOD dct_method
- Selects the algorithm used for the DCT step. Choices are:
- JDCT_ISLOW: slow but accurate integer algorithm
- JDCT_IFAST: faster, less accurate integer method
- JDCT_FLOAT: floating-point method
- JDCT_DEFAULT: default method (normally JDCT_ISLOW)
- JDCT_FASTEST: fastest method (normally JDCT_IFAST)
- The FLOAT method is very slightly more accurate than the ISLOW method,
- but may give different results on different machines due to varying
- roundoff behavior. The integer methods should give the same results
- on all machines. On machines with sufficiently fast FP hardware, the
- floating-point method may also be the fastest. The IFAST method is
- considerably less accurate than the other two; its use is not
- recommended if high quality is a concern. JDCT_DEFAULT and
- JDCT_FASTEST are macros configurable by each installation.
-
-J_COLOR_SPACE jpeg_color_space
-int num_components
- The JPEG color space and corresponding number of components; see
- "Special color spaces", below, for more info. We recommend using
- jpeg_set_color_space() if you want to change these.
-
-boolean optimize_coding
- TRUE causes the compressor to compute optimal Huffman coding tables
- for the image. This requires an extra pass over the data and
- therefore costs a good deal of space and time. The default is
- FALSE, which tells the compressor to use the supplied or default
- Huffman tables. In most cases optimal tables save only a few percent
- of file size compared to the default tables. Note that when this is
- TRUE, you need not supply Huffman tables at all, and any you do
- supply will be overwritten.
-
-unsigned int restart_interval
-int restart_in_rows
- To emit restart markers in the JPEG file, set one of these nonzero.
- Set restart_interval to specify the exact interval in MCU blocks.
- Set restart_in_rows to specify the interval in MCU rows. (If
- restart_in_rows is not 0, then restart_interval is set after the
- image width in MCUs is computed.) Defaults are zero (no restarts).
- One restart marker per MCU row is often a good choice.
- NOTE: the overhead of restart markers is higher in grayscale JPEG
- files than in color files, and MUCH higher in progressive JPEGs.
- If you use restarts, you may want to use larger intervals in those
- cases.
-
-const jpeg_scan_info * scan_info
-int num_scans
- By default, scan_info is NULL; this causes the compressor to write a
- single-scan sequential JPEG file. If not NULL, scan_info points to
- an array of scan definition records of length num_scans. The
- compressor will then write a JPEG file having one scan for each scan
- definition record. This is used to generate noninterleaved or
- progressive JPEG files. The library checks that the scan array
- defines a valid JPEG scan sequence. (jpeg_simple_progression creates
- a suitable scan definition array for progressive JPEG.) This is
- discussed further under "Progressive JPEG support".
-
-int smoothing_factor
- If non-zero, the input image is smoothed; the value should be 1 for
- minimal smoothing to 100 for maximum smoothing. Consult jcsample.c
- for details of the smoothing algorithm. The default is zero.
-
-boolean write_JFIF_header
- If TRUE, a JFIF APP0 marker is emitted. jpeg_set_defaults() and
- jpeg_set_colorspace() set this TRUE if a JFIF-legal JPEG color space
- (ie, YCbCr or grayscale) is selected, otherwise FALSE.
-
-UINT8 JFIF_major_version
-UINT8 JFIF_minor_version
- The version number to be written into the JFIF marker.
- jpeg_set_defaults() initializes the version to 1.01 (major=minor=1).
- You should set it to 1.02 (major=1, minor=2) if you plan to write
- any JFIF 1.02 extension markers.
-
-UINT8 density_unit
-UINT16 X_density
-UINT16 Y_density
- The resolution information to be written into the JFIF marker;
- not used otherwise. density_unit may be 0 for unknown,
- 1 for dots/inch, or 2 for dots/cm. The default values are 0,1,1
- indicating square pixels of unknown size.
-
-boolean write_Adobe_marker
- If TRUE, an Adobe APP14 marker is emitted. jpeg_set_defaults() and
- jpeg_set_colorspace() set this TRUE if JPEG color space RGB, CMYK,
- or YCCK is selected, otherwise FALSE. It is generally a bad idea
- to set both write_JFIF_header and write_Adobe_marker. In fact,
- you probably shouldn't change the default settings at all --- the
- default behavior ensures that the JPEG file's color space can be
- recognized by the decoder.
-
-JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS]
- Pointers to coefficient quantization tables, one per table slot,
- or NULL if no table is defined for a slot. Usually these should
- be set via one of the above helper routines; jpeg_add_quant_table()
- is general enough to define any quantization table. The other
- routines will set up table slot 0 for luminance quality and table
- slot 1 for chrominance.
-
-JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS]
-JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS]
- Pointers to Huffman coding tables, one per table slot, or NULL if
- no table is defined for a slot. Slots 0 and 1 are filled with the
- JPEG sample tables by jpeg_set_defaults(). If you need to allocate
- more table structures, jpeg_alloc_huff_table() may be used.
- Note that optimal Huffman tables can be computed for an image
- by setting optimize_coding, as discussed above; there's seldom
- any need to mess with providing your own Huffman tables.
-
-There are some additional cinfo fields which are not documented here
-because you currently can't change them; for example, you can't set
-arith_code TRUE because arithmetic coding is unsupported.
-
-
-Per-component parameters are stored in the struct cinfo.comp_info[i] for
-component number i. Note that components here refer to components of the
-JPEG color space, *not* the source image color space. A suitably large
-comp_info[] array is allocated by jpeg_set_defaults(); if you choose not
-to use that routine, it's up to you to allocate the array.
-
-int component_id
- The one-byte identifier code to be recorded in the JPEG file for
- this component. For the standard color spaces, we recommend you
- leave the default values alone.
-
-int h_samp_factor
-int v_samp_factor
- Horizontal and vertical sampling factors for the component; must
- be 1..4 according to the JPEG standard. Note that larger sampling
- factors indicate a higher-resolution component; many people find
- this behavior quite unintuitive. The default values are 2,2 for
- luminance components and 1,1 for chrominance components, except
- for grayscale where 1,1 is used.
-
-int quant_tbl_no
- Quantization table number for component. The default value is
- 0 for luminance components and 1 for chrominance components.
-
-int dc_tbl_no
-int ac_tbl_no
- DC and AC entropy coding table numbers. The default values are
- 0 for luminance components and 1 for chrominance components.
-
-int component_index
- Must equal the component's index in comp_info[]. (Beginning in
- release v6, the compressor library will fill this in automatically;
- you don't have to.)
-
-
-Decompression parameter selection
----------------------------------
-
-Decompression parameter selection is somewhat simpler than compression
-parameter selection, since all of the JPEG internal parameters are
-recorded in the source file and need not be supplied by the application.
-(Unless you are working with abbreviated files, in which case see
-"Abbreviated datastreams", below.) Decompression parameters control
-the postprocessing done on the image to deliver it in a format suitable
-for the application's use. Many of the parameters control speed/quality
-tradeoffs, in which faster decompression may be obtained at the price of
-a poorer-quality image. The defaults select the highest quality (slowest)
-processing.
-
-The following fields in the JPEG object are set by jpeg_read_header() and
-may be useful to the application in choosing decompression parameters:
-
-JDIMENSION image_width Width and height of image
-JDIMENSION image_height
-int num_components Number of color components
-J_COLOR_SPACE jpeg_color_space Colorspace of image
-boolean saw_JFIF_marker TRUE if a JFIF APP0 marker was seen
- UINT8 JFIF_major_version Version information from JFIF marker
- UINT8 JFIF_minor_version
- UINT8 density_unit Resolution data from JFIF marker
- UINT16 X_density
- UINT16 Y_density
-boolean saw_Adobe_marker TRUE if an Adobe APP14 marker was seen
- UINT8 Adobe_transform Color transform code from Adobe marker
-
-The JPEG color space, unfortunately, is something of a guess since the JPEG
-standard proper does not provide a way to record it. In practice most files
-adhere to the JFIF or Adobe conventions, and the decoder will recognize these
-correctly. See "Special color spaces", below, for more info.
-
-
-The decompression parameters that determine the basic properties of the
-returned image are:
-
-J_COLOR_SPACE out_color_space
- Output color space. jpeg_read_header() sets an appropriate default
- based on jpeg_color_space; typically it will be RGB or grayscale.
- The application can change this field to request output in a different
- colorspace. For example, set it to JCS_GRAYSCALE to get grayscale
- output from a color file. (This is useful for previewing: grayscale
- output is faster than full color since the color components need not
- be processed.) Note that not all possible color space transforms are
- currently implemented; you may need to extend jdcolor.c if you want an
- unusual conversion.
-
-unsigned int scale_num, scale_denom
- Scale the image by the fraction scale_num/scale_denom. Default is
- 1/1, or no scaling. Currently, the only supported scaling ratios
- are 1/1, 1/2, 1/4, and 1/8. (The library design allows for arbitrary
- scaling ratios but this is not likely to be implemented any time soon.)
- Smaller scaling ratios permit significantly faster decoding since
- fewer pixels need be processed and a simpler IDCT method can be used.
-
-boolean quantize_colors
- If set TRUE, colormapped output will be delivered. Default is FALSE,
- meaning that full-color output will be delivered.
-
-The next three parameters are relevant only if quantize_colors is TRUE.
-
-int desired_number_of_colors
- Maximum number of colors to use in generating a library-supplied color
- map (the actual number of colors is returned in a different field).
- Default 256. Ignored when the application supplies its own color map.
-
-boolean two_pass_quantize
- If TRUE, an extra pass over the image is made to select a custom color
- map for the image. This usually looks a lot better than the one-size-
- fits-all colormap that is used otherwise. Default is TRUE. Ignored
- when the application supplies its own color map.
-
-J_DITHER_MODE dither_mode
- Selects color dithering method. Supported values are:
- JDITHER_NONE no dithering: fast, very low quality
- JDITHER_ORDERED ordered dither: moderate speed and quality
- JDITHER_FS Floyd-Steinberg dither: slow, high quality
- Default is JDITHER_FS. (At present, ordered dither is implemented
- only in the single-pass, standard-colormap case. If you ask for
- ordered dither when two_pass_quantize is TRUE or when you supply
- an external color map, you'll get F-S dithering.)
-
-When quantize_colors is TRUE, the target color map is described by the next
-two fields. colormap is set to NULL by jpeg_read_header(). The application
-can supply a color map by setting colormap non-NULL and setting
-actual_number_of_colors to the map size. Otherwise, jpeg_start_decompress()
-selects a suitable color map and sets these two fields itself.
-[Implementation restriction: at present, an externally supplied colormap is
-only accepted for 3-component output color spaces.]
-
-JSAMPARRAY colormap
- The color map, represented as a 2-D pixel array of out_color_components
- rows and actual_number_of_colors columns. Ignored if not quantizing.
- CAUTION: if the JPEG library creates its own colormap, the storage
- pointed to by this field is released by jpeg_finish_decompress().
- Copy the colormap somewhere else first, if you want to save it.
-
-int actual_number_of_colors
- The number of colors in the color map.
-
-Additional decompression parameters that the application may set include:
-
-J_DCT_METHOD dct_method
- Selects the algorithm used for the DCT step. Choices are the same
- as described above for compression.
-
-boolean do_fancy_upsampling
- If TRUE, do careful upsampling of chroma components. If FALSE,
- a faster but sloppier method is used. Default is TRUE. The visual
- impact of the sloppier method is often very small.
-
-boolean do_block_smoothing
- If TRUE, interblock smoothing is applied in early stages of decoding
- progressive JPEG files; if FALSE, not. Default is TRUE. Early
- progression stages look "fuzzy" with smoothing, "blocky" without.
- In any case, block smoothing ceases to be applied after the first few
- AC coefficients are known to full accuracy, so it is relevant only
- when using buffered-image mode for progressive images.
-
-boolean enable_1pass_quant
-boolean enable_external_quant
-boolean enable_2pass_quant
- These are significant only in buffered-image mode, which is
- described in its own section below.
-
-
-The output image dimensions are given by the following fields. These are
-computed from the source image dimensions and the decompression parameters
-by jpeg_start_decompress(). You can also call jpeg_calc_output_dimensions()
-to obtain the values that will result from the current parameter settings.
-This can be useful if you are trying to pick a scaling ratio that will get
-close to a desired target size. It's also important if you are using the
-JPEG library's memory manager to allocate output buffer space, because you
-are supposed to request such buffers *before* jpeg_start_decompress().
-
-JDIMENSION output_width Actual dimensions of output image.
-JDIMENSION output_height
-int out_color_components Number of color components in out_color_space.
-int output_components Number of color components returned.
-int rec_outbuf_height Recommended height of scanline buffer.
-
-When quantizing colors, output_components is 1, indicating a single color map
-index per pixel. Otherwise it equals out_color_components. The output arrays
-are required to be output_width * output_components JSAMPLEs wide.
-
-rec_outbuf_height is the recommended minimum height (in scanlines) of the
-buffer passed to jpeg_read_scanlines(). If the buffer is smaller, the
-library will still work, but time will be wasted due to unnecessary data
-copying. In high-quality modes, rec_outbuf_height is always 1, but some
-faster, lower-quality modes set it to larger values (typically 2 to 4).
-If you are going to ask for a high-speed processing mode, you may as well
-go to the trouble of honoring rec_outbuf_height so as to avoid data copying.
-(An output buffer larger than rec_outbuf_height lines is OK, but won't
-provide any material speed improvement over that height.)
-
-
-Special color spaces
---------------------
-
-The JPEG standard itself is "color blind" and doesn't specify any particular
-color space. It is customary to convert color data to a luminance/chrominance
-color space before compressing, since this permits greater compression. The
-existing de-facto JPEG file format standards specify YCbCr or grayscale data
-(JFIF), or grayscale, RGB, YCbCr, CMYK, or YCCK (Adobe). For special
-applications such as multispectral images, other color spaces can be used,
-but it must be understood that such files will be unportable.
-
-The JPEG library can handle the most common colorspace conversions (namely
-RGB <=> YCbCr and CMYK <=> YCCK). It can also deal with data of an unknown
-color space, passing it through without conversion. If you deal extensively
-with an unusual color space, you can easily extend the library to understand
-additional color spaces and perform appropriate conversions.
-
-For compression, the source data's color space is specified by field
-in_color_space. This is transformed to the JPEG file's color space given
-by jpeg_color_space. jpeg_set_defaults() chooses a reasonable JPEG color
-space depending on in_color_space, but you can override this by calling
-jpeg_set_colorspace(). Of course you must select a supported transformation.
-jccolor.c currently supports the following transformations:
- RGB => YCbCr
- RGB => GRAYSCALE
- YCbCr => GRAYSCALE
- CMYK => YCCK
-plus the null transforms: GRAYSCALE => GRAYSCALE, RGB => RGB,
-YCbCr => YCbCr, CMYK => CMYK, YCCK => YCCK, and UNKNOWN => UNKNOWN.
-
-The de-facto file format standards (JFIF and Adobe) specify APPn markers that
-indicate the color space of the JPEG file. It is important to ensure that
-these are written correctly, or omitted if the JPEG file's color space is not
-one of the ones supported by the de-facto standards. jpeg_set_colorspace()
-will set the compression parameters to include or omit the APPn markers
-properly, so long as it is told the truth about the JPEG color space.
-For example, if you are writing some random 3-component color space without
-conversion, don't try to fake out the library by setting in_color_space and
-jpeg_color_space to JCS_YCbCr; use JCS_UNKNOWN. You may want to write an
-APPn marker of your own devising to identify the colorspace --- see "Special
-markers", below.
-
-When told that the color space is UNKNOWN, the library will default to using
-luminance-quality compression parameters for all color components. You may
-well want to change these parameters. See the source code for
-jpeg_set_colorspace(), in jcparam.c, for details.
-
-For decompression, the JPEG file's color space is given in jpeg_color_space,
-and this is transformed to the output color space out_color_space.
-jpeg_read_header's setting of jpeg_color_space can be relied on if the file
-conforms to JFIF or Adobe conventions, but otherwise it is no better than a
-guess. If you know the JPEG file's color space for certain, you can override
-jpeg_read_header's guess by setting jpeg_color_space. jpeg_read_header also
-selects a default output color space based on (its guess of) jpeg_color_space;
-set out_color_space to override this. Again, you must select a supported
-transformation. jdcolor.c currently supports
- YCbCr => GRAYSCALE
- YCbCr => RGB
- GRAYSCALE => RGB
- YCCK => CMYK
-as well as the null transforms. (Since GRAYSCALE=>RGB is provided, an
-application can force grayscale JPEGs to look like color JPEGs if it only
-wants to handle one case.)
-
-The two-pass color quantizer, jquant2.c, is specialized to handle RGB data
-(it weights distances appropriately for RGB colors). You'll need to modify
-the code if you want to use it for non-RGB output color spaces. Note that
-jquant2.c is used to map to an application-supplied colormap as well as for
-the normal two-pass colormap selection process.
-
-CAUTION: it appears that Adobe Photoshop writes inverted data in CMYK JPEG
-files: 0 represents 100% ink coverage, rather than 0% ink as you'd expect.
-This is arguably a bug in Photoshop, but if you need to work with Photoshop
-CMYK files, you will have to deal with it in your application. We cannot
-"fix" this in the library by inverting the data during the CMYK<=>YCCK
-transform, because that would break other applications, notably Ghostscript.
-Photoshop versions prior to 3.0 write EPS files containing JPEG-encoded CMYK
-data in the same inverted-YCCK representation used in bare JPEG files, but
-the surrounding PostScript code performs an inversion using the PS image
-operator. I am told that Photoshop 3.0 will write uninverted YCCK in
-EPS/JPEG files, and will omit the PS-level inversion. (But the data
-polarity used in bare JPEG files will not change in 3.0.) In either case,
-the JPEG library must not invert the data itself, or else Ghostscript would
-read these EPS files incorrectly.
-
-
-Error handling
---------------
-
-When the default error handler is used, any error detected inside the JPEG
-routines will cause a message to be printed on stderr, followed by exit().
-You can supply your own error handling routines to override this behavior
-and to control the treatment of nonfatal warnings and trace/debug messages.
-The file example.c illustrates the most common case, which is to have the
-application regain control after an error rather than exiting.
-
-The JPEG library never writes any message directly; it always goes through
-the error handling routines. Three classes of messages are recognized:
- * Fatal errors: the library cannot continue.
- * Warnings: the library can continue, but the data is corrupt, and a
- damaged output image is likely to result.
- * Trace/informational messages. These come with a trace level indicating
- the importance of the message; you can control the verbosity of the
- program by adjusting the maximum trace level that will be displayed.
-
-You may, if you wish, simply replace the entire JPEG error handling module
-(jerror.c) with your own code. However, you can avoid code duplication by
-only replacing some of the routines depending on the behavior you need.
-This is accomplished by calling jpeg_std_error() as usual, but then overriding
-some of the method pointers in the jpeg_error_mgr struct, as illustrated by
-example.c.
-
-All of the error handling routines will receive a pointer to the JPEG object
-(a j_common_ptr which points to either a jpeg_compress_struct or a
-jpeg_decompress_struct; if you need to tell which, test the is_decompressor
-field). This struct includes a pointer to the error manager struct in its
-"err" field. Frequently, custom error handler routines will need to access
-additional data which is not known to the JPEG library or the standard error
-handler. The most convenient way to do this is to embed either the JPEG
-object or the jpeg_error_mgr struct in a larger structure that contains
-additional fields; then casting the passed pointer provides access to the
-additional fields. Again, see example.c for one way to do it. (Beginning
-with IJG version 6b, there is also a void pointer "client_data" in each
-JPEG object, which the application can also use to find related data.
-The library does not touch client_data at all.)
-
-The individual methods that you might wish to override are:
-
-error_exit (j_common_ptr cinfo)
- Receives control for a fatal error. Information sufficient to
- generate the error message has been stored in cinfo->err; call
- output_message to display it. Control must NOT return to the caller;
- generally this routine will exit() or longjmp() somewhere.
- Typically you would override this routine to get rid of the exit()
- default behavior. Note that if you continue processing, you should
- clean up the JPEG object with jpeg_abort() or jpeg_destroy().
-
-output_message (j_common_ptr cinfo)
- Actual output of any JPEG message. Override this to send messages
- somewhere other than stderr. Note that this method does not know
- how to generate a message, only where to send it.
-
-format_message (j_common_ptr cinfo, char * buffer)
- Constructs a readable error message string based on the error info
- stored in cinfo->err. This method is called by output_message. Few
- applications should need to override this method. One possible
- reason for doing so is to implement dynamic switching of error message
- language.
-
-emit_message (j_common_ptr cinfo, int msg_level)
- Decide whether or not to emit a warning or trace message; if so,
- calls output_message. The main reason for overriding this method
- would be to abort on warnings. msg_level is -1 for warnings,
- 0 and up for trace messages.
-
-Only error_exit() and emit_message() are called from the rest of the JPEG
-library; the other two are internal to the error handler.
-
-The actual message texts are stored in an array of strings which is pointed to
-by the field err->jpeg_message_table. The messages are numbered from 0 to
-err->last_jpeg_message, and it is these code numbers that are used in the
-JPEG library code. You could replace the message texts (for instance, with
-messages in French or German) by changing the message table pointer. See
-jerror.h for the default texts. CAUTION: this table will almost certainly
-change or grow from one library version to the next.
-
-It may be useful for an application to add its own message texts that are
-handled by the same mechanism. The error handler supports a second "add-on"
-message table for this purpose. To define an addon table, set the pointer
-err->addon_message_table and the message numbers err->first_addon_message and
-err->last_addon_message. If you number the addon messages beginning at 1000
-or so, you won't have to worry about conflicts with the library's built-in
-messages. See the sample applications cjpeg/djpeg for an example of using
-addon messages (the addon messages are defined in cderror.h).
-
-Actual invocation of the error handler is done via macros defined in jerror.h:
- ERREXITn(...) for fatal errors
- WARNMSn(...) for corrupt-data warnings
- TRACEMSn(...) for trace and informational messages.
-These macros store the message code and any additional parameters into the
-error handler struct, then invoke the error_exit() or emit_message() method.
-The variants of each macro are for varying numbers of additional parameters.
-The additional parameters are inserted into the generated message using
-standard printf() format codes.
-
-See jerror.h and jerror.c for further details.
-
-
-Compressed data handling (source and destination managers)
-----------------------------------------------------------
-
-The JPEG compression library sends its compressed data to a "destination
-manager" module. The default destination manager just writes the data to a
-stdio stream, but you can provide your own manager to do something else.
-Similarly, the decompression library calls a "source manager" to obtain the
-compressed data; you can provide your own source manager if you want the data
-to come from somewhere other than a stdio stream.
-
-In both cases, compressed data is processed a bufferload at a time: the
-destination or source manager provides a work buffer, and the library invokes
-the manager only when the buffer is filled or emptied. (You could define a
-one-character buffer to force the manager to be invoked for each byte, but
-that would be rather inefficient.) The buffer's size and location are
-controlled by the manager, not by the library. For example, if you desired to
-decompress a JPEG datastream that was all in memory, you could just make the
-buffer pointer and length point to the original data in memory. Then the
-buffer-reload procedure would be invoked only if the decompressor ran off the
-end of the datastream, which would indicate an erroneous datastream.
-
-The work buffer is defined as an array of datatype JOCTET, which is generally
-"char" or "unsigned char". On a machine where char is not exactly 8 bits
-wide, you must define JOCTET as a wider data type and then modify the data
-source and destination modules to transcribe the work arrays into 8-bit units
-on external storage.
-
-A data destination manager struct contains a pointer and count defining the
-next byte to write in the work buffer and the remaining free space:
-
- JOCTET * next_output_byte; /* => next byte to write in buffer */
- size_t free_in_buffer; /* # of byte spaces remaining in buffer */
-
-The library increments the pointer and decrements the count until the buffer
-is filled. The manager's empty_output_buffer method must reset the pointer
-and count. The manager is expected to remember the buffer's starting address
-and total size in private fields not visible to the library.
-
-A data destination manager provides three methods:
-
-init_destination (j_compress_ptr cinfo)
- Initialize destination. This is called by jpeg_start_compress()
- before any data is actually written. It must initialize
- next_output_byte and free_in_buffer. free_in_buffer must be
- initialized to a positive value.
-
-empty_output_buffer (j_compress_ptr cinfo)
- This is called whenever the buffer has filled (free_in_buffer
- reaches zero). In typical applications, it should write out the
- *entire* buffer (use the saved start address and buffer length;
- ignore the current state of next_output_byte and free_in_buffer).
- Then reset the pointer & count to the start of the buffer, and
- return TRUE indicating that the buffer has been dumped.
- free_in_buffer must be set to a positive value when TRUE is
- returned. A FALSE return should only be used when I/O suspension is
- desired (this operating mode is discussed in the next section).
-
-term_destination (j_compress_ptr cinfo)
- Terminate destination --- called by jpeg_finish_compress() after all
- data has been written. In most applications, this must flush any
- data remaining in the buffer. Use either next_output_byte or
- free_in_buffer to determine how much data is in the buffer.
-
-term_destination() is NOT called by jpeg_abort() or jpeg_destroy(). If you
-want the destination manager to be cleaned up during an abort, you must do it
-yourself.
-
-You will also need code to create a jpeg_destination_mgr struct, fill in its
-method pointers, and insert a pointer to the struct into the "dest" field of
-the JPEG compression object. This can be done in-line in your setup code if
-you like, but it's probably cleaner to provide a separate routine similar to
-the jpeg_stdio_dest() routine of the supplied destination manager.
-
-Decompression source managers follow a parallel design, but with some
-additional frammishes. The source manager struct contains a pointer and count
-defining the next byte to read from the work buffer and the number of bytes
-remaining:
-
- const JOCTET * next_input_byte; /* => next byte to read from buffer */
- size_t bytes_in_buffer; /* # of bytes remaining in buffer */
-
-The library increments the pointer and decrements the count until the buffer
-is emptied. The manager's fill_input_buffer method must reset the pointer and
-count. In most applications, the manager must remember the buffer's starting
-address and total size in private fields not visible to the library.
-
-A data source manager provides five methods:
-
-init_source (j_decompress_ptr cinfo)
- Initialize source. This is called by jpeg_read_header() before any
- data is actually read. Unlike init_destination(), it may leave
- bytes_in_buffer set to 0 (in which case a fill_input_buffer() call
- will occur immediately).
-
-fill_input_buffer (j_decompress_ptr cinfo)
- This is called whenever bytes_in_buffer has reached zero and more
- data is wanted. In typical applications, it should read fresh data
- into the buffer (ignoring the current state of next_input_byte and
- bytes_in_buffer), reset the pointer & count to the start of the
- buffer, and return TRUE indicating that the buffer has been reloaded.
- It is not necessary to fill the buffer entirely, only to obtain at
- least one more byte. bytes_in_buffer MUST be set to a positive value
- if TRUE is returned. A FALSE return should only be used when I/O
- suspension is desired (this mode is discussed in the next section).
-
-skip_input_data (j_decompress_ptr cinfo, long num_bytes)
- Skip num_bytes worth of data. The buffer pointer and count should
- be advanced over num_bytes input bytes, refilling the buffer as
- needed. This is used to skip over a potentially large amount of
- uninteresting data (such as an APPn marker). In some applications
- it may be possible to optimize away the reading of the skipped data,
- but it's not clear that being smart is worth much trouble; large
- skips are uncommon. bytes_in_buffer may be zero on return.
- A zero or negative skip count should be treated as a no-op.
-
-resync_to_restart (j_decompress_ptr cinfo, int desired)
- This routine is called only when the decompressor has failed to find
- a restart (RSTn) marker where one is expected. Its mission is to
- find a suitable point for resuming decompression. For most
- applications, we recommend that you just use the default resync
- procedure, jpeg_resync_to_restart(). However, if you are able to back
- up in the input data stream, or if you have a-priori knowledge about
- the likely location of restart markers, you may be able to do better.
- Read the read_restart_marker() and jpeg_resync_to_restart() routines
- in jdmarker.c if you think you'd like to implement your own resync
- procedure.
-
-term_source (j_decompress_ptr cinfo)
- Terminate source --- called by jpeg_finish_decompress() after all
- data has been read. Often a no-op.
-
-For both fill_input_buffer() and skip_input_data(), there is no such thing
-as an EOF return. If the end of the file has been reached, the routine has
-a choice of exiting via ERREXIT() or inserting fake data into the buffer.
-In most cases, generating a warning message and inserting a fake EOI marker
-is the best course of action --- this will allow the decompressor to output
-however much of the image is there. In pathological cases, the decompressor
-may swallow the EOI and again demand data ... just keep feeding it fake EOIs.
-jdatasrc.c illustrates the recommended error recovery behavior.
-
-term_source() is NOT called by jpeg_abort() or jpeg_destroy(). If you want
-the source manager to be cleaned up during an abort, you must do it yourself.
-
-You will also need code to create a jpeg_source_mgr struct, fill in its method
-pointers, and insert a pointer to the struct into the "src" field of the JPEG
-decompression object. This can be done in-line in your setup code if you
-like, but it's probably cleaner to provide a separate routine similar to the
-jpeg_stdio_src() routine of the supplied source manager.
-
-For more information, consult the stdio source and destination managers
-in jdatasrc.c and jdatadst.c.
-
-
-I/O suspension
---------------
-
-Some applications need to use the JPEG library as an incremental memory-to-
-memory filter: when the compressed data buffer is filled or emptied, they want
-control to return to the outer loop, rather than expecting that the buffer can
-be emptied or reloaded within the data source/destination manager subroutine.
-The library supports this need by providing an "I/O suspension" mode, which we
-describe in this section.
-
-The I/O suspension mode is not a panacea: nothing is guaranteed about the
-maximum amount of time spent in any one call to the library, so it will not
-eliminate response-time problems in single-threaded applications. If you
-need guaranteed response time, we suggest you "bite the bullet" and implement
-a real multi-tasking capability.
-
-To use I/O suspension, cooperation is needed between the calling application
-and the data source or destination manager; you will always need a custom
-source/destination manager. (Please read the previous section if you haven't
-already.) The basic idea is that the empty_output_buffer() or
-fill_input_buffer() routine is a no-op, merely returning FALSE to indicate
-that it has done nothing. Upon seeing this, the JPEG library suspends
-operation and returns to its caller. The surrounding application is
-responsible for emptying or refilling the work buffer before calling the
-JPEG library again.
-
-Compression suspension:
-
-For compression suspension, use an empty_output_buffer() routine that returns
-FALSE; typically it will not do anything else. This will cause the
-compressor to return to the caller of jpeg_write_scanlines(), with the return
-value indicating that not all the supplied scanlines have been accepted.
-The application must make more room in the output buffer, adjust the output
-buffer pointer/count appropriately, and then call jpeg_write_scanlines()
-again, pointing to the first unconsumed scanline.
-
-When forced to suspend, the compressor will backtrack to a convenient stopping
-point (usually the start of the current MCU); it will regenerate some output
-data when restarted. Therefore, although empty_output_buffer() is only
-called when the buffer is filled, you should NOT write out the entire buffer
-after a suspension. Write only the data up to the current position of
-next_output_byte/free_in_buffer. The data beyond that point will be
-regenerated after resumption.
-
-Because of the backtracking behavior, a good-size output buffer is essential
-for efficiency; you don't want the compressor to suspend often. (In fact, an
-overly small buffer could lead to infinite looping, if a single MCU required
-more data than would fit in the buffer.) We recommend a buffer of at least
-several Kbytes. You may want to insert explicit code to ensure that you don't
-call jpeg_write_scanlines() unless there is a reasonable amount of space in
-the output buffer; in other words, flush the buffer before trying to compress
-more data.
-
-The compressor does not allow suspension while it is trying to write JPEG
-markers at the beginning and end of the file. This means that:
- * At the beginning of a compression operation, there must be enough free
- space in the output buffer to hold the header markers (typically 600 or
- so bytes). The recommended buffer size is bigger than this anyway, so
- this is not a problem as long as you start with an empty buffer. However,
- this restriction might catch you if you insert large special markers, such
- as a JFIF thumbnail image, without flushing the buffer afterwards.
- * When you call jpeg_finish_compress(), there must be enough space in the
- output buffer to emit any buffered data and the final EOI marker. In the
- current implementation, half a dozen bytes should suffice for this, but
- for safety's sake we recommend ensuring that at least 100 bytes are free
- before calling jpeg_finish_compress().
-
-A more significant restriction is that jpeg_finish_compress() cannot suspend.
-This means you cannot use suspension with multi-pass operating modes, namely
-Huffman code optimization and multiple-scan output. Those modes write the
-whole file during jpeg_finish_compress(), which will certainly result in
-buffer overrun. (Note that this restriction applies only to compression,
-not decompression. The decompressor supports input suspension in all of its
-operating modes.)
-
-Decompression suspension:
-
-For decompression suspension, use a fill_input_buffer() routine that simply
-returns FALSE (except perhaps during error recovery, as discussed below).
-This will cause the decompressor to return to its caller with an indication
-that suspension has occurred. This can happen at four places:
- * jpeg_read_header(): will return JPEG_SUSPENDED.
- * jpeg_start_decompress(): will return FALSE, rather than its usual TRUE.
- * jpeg_read_scanlines(): will return the number of scanlines already
- completed (possibly 0).
- * jpeg_finish_decompress(): will return FALSE, rather than its usual TRUE.
-The surrounding application must recognize these cases, load more data into
-the input buffer, and repeat the call. In the case of jpeg_read_scanlines(),
-increment the passed pointers past any scanlines successfully read.
-
-Just as with compression, the decompressor will typically backtrack to a
-convenient restart point before suspending. When fill_input_buffer() is
-called, next_input_byte/bytes_in_buffer point to the current restart point,
-which is where the decompressor will backtrack to if FALSE is returned.
-The data beyond that position must NOT be discarded if you suspend; it needs
-to be re-read upon resumption. In most implementations, you'll need to shift
-this data down to the start of your work buffer and then load more data after
-it. Again, this behavior means that a several-Kbyte work buffer is essential
-for decent performance; furthermore, you should load a reasonable amount of
-new data before resuming decompression. (If you loaded, say, only one new
-byte each time around, you could waste a LOT of cycles.)
-
-The skip_input_data() source manager routine requires special care in a
-suspension scenario. This routine is NOT granted the ability to suspend the
-decompressor; it can decrement bytes_in_buffer to zero, but no more. If the
-requested skip distance exceeds the amount of data currently in the input
-buffer, then skip_input_data() must set bytes_in_buffer to zero and record the
-additional skip distance somewhere else. The decompressor will immediately
-call fill_input_buffer(), which should return FALSE, which will cause a
-suspension return. The surrounding application must then arrange to discard
-the recorded number of bytes before it resumes loading the input buffer.
-(Yes, this design is rather baroque, but it avoids complexity in the far more
-common case where a non-suspending source manager is used.)
-
-If the input data has been exhausted, we recommend that you emit a warning
-and insert dummy EOI markers just as a non-suspending data source manager
-would do. This can be handled either in the surrounding application logic or
-within fill_input_buffer(); the latter is probably more efficient. If
-fill_input_buffer() knows that no more data is available, it can set the
-pointer/count to point to a dummy EOI marker and then return TRUE just as
-though it had read more data in a non-suspending situation.
-
-The decompressor does not attempt to suspend within standard JPEG markers;
-instead it will backtrack to the start of the marker and reprocess the whole
-marker next time. Hence the input buffer must be large enough to hold the
-longest standard marker in the file. Standard JPEG markers should normally
-not exceed a few hundred bytes each (DHT tables are typically the longest).
-We recommend at least a 2K buffer for performance reasons, which is much
-larger than any correct marker is likely to be. For robustness against
-damaged marker length counts, you may wish to insert a test in your
-application for the case that the input buffer is completely full and yet
-the decoder has suspended without consuming any data --- otherwise, if this
-situation did occur, it would lead to an endless loop. (The library can't
-provide this test since it has no idea whether "the buffer is full", or
-even whether there is a fixed-size input buffer.)
-
-The input buffer would need to be 64K to allow for arbitrary COM or APPn
-markers, but these are handled specially: they are either saved into allocated
-memory, or skipped over by calling skip_input_data(). In the former case,
-suspension is handled correctly, and in the latter case, the problem of
-buffer overrun is placed on skip_input_data's shoulders, as explained above.
-Note that if you provide your own marker handling routine for large markers,
-you should consider how to deal with buffer overflow.
-
-Multiple-buffer management:
-
-In some applications it is desirable to store the compressed data in a linked
-list of buffer areas, so as to avoid data copying. This can be handled by
-having empty_output_buffer() or fill_input_buffer() set the pointer and count
-to reference the next available buffer; FALSE is returned only if no more
-buffers are available. Although seemingly straightforward, there is a
-pitfall in this approach: the backtrack that occurs when FALSE is returned
-could back up into an earlier buffer. For example, when fill_input_buffer()
-is called, the current pointer & count indicate the backtrack restart point.
-Since fill_input_buffer() will set the pointer and count to refer to a new
-buffer, the restart position must be saved somewhere else. Suppose a second
-call to fill_input_buffer() occurs in the same library call, and no
-additional input data is available, so fill_input_buffer must return FALSE.
-If the JPEG library has not moved the pointer/count forward in the current
-buffer, then *the correct restart point is the saved position in the prior
-buffer*. Prior buffers may be discarded only after the library establishes
-a restart point within a later buffer. Similar remarks apply for output into
-a chain of buffers.
-
-The library will never attempt to backtrack over a skip_input_data() call,
-so any skipped data can be permanently discarded. You still have to deal
-with the case of skipping not-yet-received data, however.
-
-It's much simpler to use only a single buffer; when fill_input_buffer() is
-called, move any unconsumed data (beyond the current pointer/count) down to
-the beginning of this buffer and then load new data into the remaining buffer
-space. This approach requires a little more data copying but is far easier
-to get right.
-
-
-Progressive JPEG support
-------------------------
-
-Progressive JPEG rearranges the stored data into a series of scans of
-increasing quality. In situations where a JPEG file is transmitted across a
-slow communications link, a decoder can generate a low-quality image very
-quickly from the first scan, then gradually improve the displayed quality as
-more scans are received. The final image after all scans are complete is
-identical to that of a regular (sequential) JPEG file of the same quality
-setting. Progressive JPEG files are often slightly smaller than equivalent
-sequential JPEG files, but the possibility of incremental display is the main
-reason for using progressive JPEG.
-
-The IJG encoder library generates progressive JPEG files when given a
-suitable "scan script" defining how to divide the data into scans.
-Creation of progressive JPEG files is otherwise transparent to the encoder.
-Progressive JPEG files can also be read transparently by the decoder library.
-If the decoding application simply uses the library as defined above, it
-will receive a final decoded image without any indication that the file was
-progressive. Of course, this approach does not allow incremental display.
-To perform incremental display, an application needs to use the decoder
-library's "buffered-image" mode, in which it receives a decoded image
-multiple times.
-
-Each displayed scan requires about as much work to decode as a full JPEG
-image of the same size, so the decoder must be fairly fast in relation to the
-data transmission rate in order to make incremental display useful. However,
-it is possible to skip displaying the image and simply add the incoming bits
-to the decoder's coefficient buffer. This is fast because only Huffman
-decoding need be done, not IDCT, upsampling, colorspace conversion, etc.
-The IJG decoder library allows the application to switch dynamically between
-displaying the image and simply absorbing the incoming bits. A properly
-coded application can automatically adapt the number of display passes to
-suit the time available as the image is received. Also, a final
-higher-quality display cycle can be performed from the buffered data after
-the end of the file is reached.
-
-Progressive compression:
-
-To create a progressive JPEG file (or a multiple-scan sequential JPEG file),
-set the scan_info cinfo field to point to an array of scan descriptors, and
-perform compression as usual. Instead of constructing your own scan list,
-you can call the jpeg_simple_progression() helper routine to create a
-recommended progression sequence; this method should be used by all
-applications that don't want to get involved in the nitty-gritty of
-progressive scan sequence design. (If you want to provide user control of
-scan sequences, you may wish to borrow the scan script reading code found
-in rdswitch.c, so that you can read scan script files just like cjpeg's.)
-When scan_info is not NULL, the compression library will store DCT'd data
-into a buffer array as jpeg_write_scanlines() is called, and will emit all
-the requested scans during jpeg_finish_compress(). This implies that
-multiple-scan output cannot be created with a suspending data destination
-manager, since jpeg_finish_compress() does not support suspension. We
-should also note that the compressor currently forces Huffman optimization
-mode when creating a progressive JPEG file, because the default Huffman
-tables are unsuitable for progressive files.
-
-Progressive decompression:
-
-When buffered-image mode is not used, the decoder library will read all of
-a multi-scan file during jpeg_start_decompress(), so that it can provide a
-final decoded image. (Here "multi-scan" means either progressive or
-multi-scan sequential.) This makes multi-scan files transparent to the
-decoding application. However, existing applications that used suspending
-input with version 5 of the IJG library will need to be modified to check
-for a suspension return from jpeg_start_decompress().
-
-To perform incremental display, an application must use the library's
-buffered-image mode. This is described in the next section.
-
-
-Buffered-image mode
--------------------
-
-In buffered-image mode, the library stores the partially decoded image in a
-coefficient buffer, from which it can be read out as many times as desired.
-This mode is typically used for incremental display of progressive JPEG files,
-but it can be used with any JPEG file. Each scan of a progressive JPEG file
-adds more data (more detail) to the buffered image. The application can
-display in lockstep with the source file (one display pass per input scan),
-or it can allow input processing to outrun display processing. By making
-input and display processing run independently, it is possible for the
-application to adapt progressive display to a wide range of data transmission
-rates.
-
-The basic control flow for buffered-image decoding is
-
- jpeg_create_decompress()
- set data source
- jpeg_read_header()
- set overall decompression parameters
- cinfo.buffered_image = TRUE; /* select buffered-image mode */
- jpeg_start_decompress()
- for (each output pass) {
- adjust output decompression parameters if required
- jpeg_start_output() /* start a new output pass */
- for (all scanlines in image) {
- jpeg_read_scanlines()
- display scanlines
- }
- jpeg_finish_output() /* terminate output pass */
- }
- jpeg_finish_decompress()
- jpeg_destroy_decompress()
-
-This differs from ordinary unbuffered decoding in that there is an additional
-level of looping. The application can choose how many output passes to make
-and how to display each pass.
-
-The simplest approach to displaying progressive images is to do one display
-pass for each scan appearing in the input file. In this case the outer loop
-condition is typically
- while (! jpeg_input_complete(&cinfo))
-and the start-output call should read
- jpeg_start_output(&cinfo, cinfo.input_scan_number);
-The second parameter to jpeg_start_output() indicates which scan of the input
-file is to be displayed; the scans are numbered starting at 1 for this
-purpose. (You can use a loop counter starting at 1 if you like, but using
-the library's input scan counter is easier.) The library automatically reads
-data as necessary to complete each requested scan, and jpeg_finish_output()
-advances to the next scan or end-of-image marker (hence input_scan_number
-will be incremented by the time control arrives back at jpeg_start_output()).
-With this technique, data is read from the input file only as needed, and
-input and output processing run in lockstep.
-
-After reading the final scan and reaching the end of the input file, the
-buffered image remains available; it can be read additional times by
-repeating the jpeg_start_output()/jpeg_read_scanlines()/jpeg_finish_output()
-sequence. For example, a useful technique is to use fast one-pass color
-quantization for display passes made while the image is arriving, followed by
-a final display pass using two-pass quantization for highest quality. This
-is done by changing the library parameters before the final output pass.
-Changing parameters between passes is discussed in detail below.
-
-In general the last scan of a progressive file cannot be recognized as such
-until after it is read, so a post-input display pass is the best approach if
-you want special processing in the final pass.
-
-When done with the image, be sure to call jpeg_finish_decompress() to release
-the buffered image (or just use jpeg_destroy_decompress()).
-
-If input data arrives faster than it can be displayed, the application can
-cause the library to decode input data in advance of what's needed to produce
-output. This is done by calling the routine jpeg_consume_input().
-The return value is one of the following:
- JPEG_REACHED_SOS: reached an SOS marker (the start of a new scan)
- JPEG_REACHED_EOI: reached the EOI marker (end of image)
- JPEG_ROW_COMPLETED: completed reading one MCU row of compressed data
- JPEG_SCAN_COMPLETED: completed reading last MCU row of current scan
- JPEG_SUSPENDED: suspended before completing any of the above
-(JPEG_SUSPENDED can occur only if a suspending data source is used.) This
-routine can be called at any time after initializing the JPEG object. It
-reads some additional data and returns when one of the indicated significant
-events occurs. (If called after the EOI marker is reached, it will
-immediately return JPEG_REACHED_EOI without attempting to read more data.)
-
-The library's output processing will automatically call jpeg_consume_input()
-whenever the output processing overtakes the input; thus, simple lockstep
-display requires no direct calls to jpeg_consume_input(). But by adding
-calls to jpeg_consume_input(), you can absorb data in advance of what is
-being displayed. This has two benefits:
- * You can limit buildup of unprocessed data in your input buffer.
- * You can eliminate extra display passes by paying attention to the
- state of the library's input processing.
-
-The first of these benefits only requires interspersing calls to
-jpeg_consume_input() with your display operations and any other processing
-you may be doing. To avoid wasting cycles due to backtracking, it's best to
-call jpeg_consume_input() only after a hundred or so new bytes have arrived.
-This is discussed further under "I/O suspension", above. (Note: the JPEG
-library currently is not thread-safe. You must not call jpeg_consume_input()
-from one thread of control if a different library routine is working on the
-same JPEG object in another thread.)
-
-When input arrives fast enough that more than one new scan is available
-before you start a new output pass, you may as well skip the output pass
-corresponding to the completed scan. This occurs for free if you pass
-cinfo.input_scan_number as the target scan number to jpeg_start_output().
-The input_scan_number field is simply the index of the scan currently being
-consumed by the input processor. You can ensure that this is up-to-date by
-emptying the input buffer just before calling jpeg_start_output(): call
-jpeg_consume_input() repeatedly until it returns JPEG_SUSPENDED or
-JPEG_REACHED_EOI.
-
-The target scan number passed to jpeg_start_output() is saved in the
-cinfo.output_scan_number field. The library's output processing calls
-jpeg_consume_input() whenever the current input scan number and row within
-that scan is less than or equal to the current output scan number and row.
-Thus, input processing can "get ahead" of the output processing but is not
-allowed to "fall behind". You can achieve several different effects by
-manipulating this interlock rule. For example, if you pass a target scan
-number greater than the current input scan number, the output processor will
-wait until that scan starts to arrive before producing any output. (To avoid
-an infinite loop, the target scan number is automatically reset to the last
-scan number when the end of image is reached. Thus, if you specify a large
-target scan number, the library will just absorb the entire input file and
-then perform an output pass. This is effectively the same as what
-jpeg_start_decompress() does when you don't select buffered-image mode.)
-When you pass a target scan number equal to the current input scan number,
-the image is displayed no faster than the current input scan arrives. The
-final possibility is to pass a target scan number less than the current input
-scan number; this disables the input/output interlock and causes the output
-processor to simply display whatever it finds in the image buffer, without
-waiting for input. (However, the library will not accept a target scan
-number less than one, so you can't avoid waiting for the first scan.)
-
-When data is arriving faster than the output display processing can advance
-through the image, jpeg_consume_input() will store data into the buffered
-image beyond the point at which the output processing is reading data out
-again. If the input arrives fast enough, it may "wrap around" the buffer to
-the point where the input is more than one whole scan ahead of the output.
-If the output processing simply proceeds through its display pass without
-paying attention to the input, the effect seen on-screen is that the lower
-part of the image is one or more scans better in quality than the upper part.
-Then, when the next output scan is started, you have a choice of what target
-scan number to use. The recommended choice is to use the current input scan
-number at that time, which implies that you've skipped the output scans
-corresponding to the input scans that were completed while you processed the
-previous output scan. In this way, the decoder automatically adapts its
-speed to the arriving data, by skipping output scans as necessary to keep up
-with the arriving data.
-
-When using this strategy, you'll want to be sure that you perform a final
-output pass after receiving all the data; otherwise your last display may not
-be full quality across the whole screen. So the right outer loop logic is
-something like this:
- do {
- absorb any waiting input by calling jpeg_consume_input()
- final_pass = jpeg_input_complete(&cinfo);
- adjust output decompression parameters if required
- jpeg_start_output(&cinfo, cinfo.input_scan_number);
- ...
- jpeg_finish_output()
- } while (! final_pass);
-rather than quitting as soon as jpeg_input_complete() returns TRUE. This
-arrangement makes it simple to use higher-quality decoding parameters
-for the final pass. But if you don't want to use special parameters for
-the final pass, the right loop logic is like this:
- for (;;) {
- absorb any waiting input by calling jpeg_consume_input()
- jpeg_start_output(&cinfo, cinfo.input_scan_number);
- ...
- jpeg_finish_output()
- if (jpeg_input_complete(&cinfo) &&
- cinfo.input_scan_number == cinfo.output_scan_number)
- break;
- }
-In this case you don't need to know in advance whether an output pass is to
-be the last one, so it's not necessary to have reached EOF before starting
-the final output pass; rather, what you want to test is whether the output
-pass was performed in sync with the final input scan. This form of the loop
-will avoid an extra output pass whenever the decoder is able (or nearly able)
-to keep up with the incoming data.
-
-When the data transmission speed is high, you might begin a display pass,
-then find that much or all of the file has arrived before you can complete
-the pass. (You can detect this by noting the JPEG_REACHED_EOI return code
-from jpeg_consume_input(), or equivalently by testing jpeg_input_complete().)
-In this situation you may wish to abort the current display pass and start a
-new one using the newly arrived information. To do so, just call
-jpeg_finish_output() and then start a new pass with jpeg_start_output().
-
-A variant strategy is to abort and restart display if more than one complete
-scan arrives during an output pass; this can be detected by noting
-JPEG_REACHED_SOS returns and/or examining cinfo.input_scan_number. This
-idea should be employed with caution, however, since the display process
-might never get to the bottom of the image before being aborted, resulting
-in the lower part of the screen being several passes worse than the upper.
-In most cases it's probably best to abort an output pass only if the whole
-file has arrived and you want to begin the final output pass immediately.
-
-When receiving data across a communication link, we recommend always using
-the current input scan number for the output target scan number; if a
-higher-quality final pass is to be done, it should be started (aborting any
-incomplete output pass) as soon as the end of file is received. However,
-many other strategies are possible. For example, the application can examine
-the parameters of the current input scan and decide whether to display it or
-not. If the scan contains only chroma data, one might choose not to use it
-as the target scan, expecting that the scan will be small and will arrive
-quickly. To skip to the next scan, call jpeg_consume_input() until it
-returns JPEG_REACHED_SOS or JPEG_REACHED_EOI. Or just use the next higher
-number as the target scan for jpeg_start_output(); but that method doesn't
-let you inspect the next scan's parameters before deciding to display it.
-
-
-In buffered-image mode, jpeg_start_decompress() never performs input and
-thus never suspends. An application that uses input suspension with
-buffered-image mode must be prepared for suspension returns from these
-routines:
-* jpeg_start_output() performs input only if you request 2-pass quantization
- and the target scan isn't fully read yet. (This is discussed below.)
-* jpeg_read_scanlines(), as always, returns the number of scanlines that it
- was able to produce before suspending.
-* jpeg_finish_output() will read any markers following the target scan,
- up to the end of the file or the SOS marker that begins another scan.
- (But it reads no input if jpeg_consume_input() has already reached the
- end of the file or a SOS marker beyond the target output scan.)
-* jpeg_finish_decompress() will read until the end of file, and thus can
- suspend if the end hasn't already been reached (as can be tested by
- calling jpeg_input_complete()).
-jpeg_start_output(), jpeg_finish_output(), and jpeg_finish_decompress()
-all return TRUE if they completed their tasks, FALSE if they had to suspend.
-In the event of a FALSE return, the application must load more input data
-and repeat the call. Applications that use non-suspending data sources need
-not check the return values of these three routines.
-
-
-It is possible to change decoding parameters between output passes in the
-buffered-image mode. The decoder library currently supports only very
-limited changes of parameters. ONLY THE FOLLOWING parameter changes are
-allowed after jpeg_start_decompress() is called:
-* dct_method can be changed before each call to jpeg_start_output().
- For example, one could use a fast DCT method for early scans, changing
- to a higher quality method for the final scan.
-* dither_mode can be changed before each call to jpeg_start_output();
- of course this has no impact if not using color quantization. Typically
- one would use ordered dither for initial passes, then switch to
- Floyd-Steinberg dither for the final pass. Caution: changing dither mode
- can cause more memory to be allocated by the library. Although the amount
- of memory involved is not large (a scanline or so), it may cause the
- initial max_memory_to_use specification to be exceeded, which in the worst
- case would result in an out-of-memory failure.
-* do_block_smoothing can be changed before each call to jpeg_start_output().
- This setting is relevant only when decoding a progressive JPEG image.
- During the first DC-only scan, block smoothing provides a very "fuzzy" look
- instead of the very "blocky" look seen without it; which is better seems a
- matter of personal taste. But block smoothing is nearly always a win
- during later stages, especially when decoding a successive-approximation
- image: smoothing helps to hide the slight blockiness that otherwise shows
- up on smooth gradients until the lowest coefficient bits are sent.
-* Color quantization mode can be changed under the rules described below.
- You *cannot* change between full-color and quantized output (because that
- would alter the required I/O buffer sizes), but you can change which
- quantization method is used.
-
-When generating color-quantized output, changing quantization method is a
-very useful way of switching between high-speed and high-quality display.
-The library allows you to change among its three quantization methods:
-1. Single-pass quantization to a fixed color cube.
- Selected by cinfo.two_pass_quantize = FALSE and cinfo.colormap = NULL.
-2. Single-pass quantization to an application-supplied colormap.
- Selected by setting cinfo.colormap to point to the colormap (the value of
- two_pass_quantize is ignored); also set cinfo.actual_number_of_colors.
-3. Two-pass quantization to a colormap chosen specifically for the image.
- Selected by cinfo.two_pass_quantize = TRUE and cinfo.colormap = NULL.
- (This is the default setting selected by jpeg_read_header, but it is
- probably NOT what you want for the first pass of progressive display!)
-These methods offer successively better quality and lesser speed. However,
-only the first method is available for quantizing in non-RGB color spaces.
-
-IMPORTANT: because the different quantizer methods have very different
-working-storage requirements, the library requires you to indicate which
-one(s) you intend to use before you call jpeg_start_decompress(). (If we did
-not require this, the max_memory_to_use setting would be a complete fiction.)
-You do this by setting one or more of these three cinfo fields to TRUE:
- enable_1pass_quant Fixed color cube colormap
- enable_external_quant Externally-supplied colormap
- enable_2pass_quant Two-pass custom colormap
-All three are initialized FALSE by jpeg_read_header(). But
-jpeg_start_decompress() automatically sets TRUE the one selected by the
-current two_pass_quantize and colormap settings, so you only need to set the
-enable flags for any other quantization methods you plan to change to later.
-
-After setting the enable flags correctly at jpeg_start_decompress() time, you
-can change to any enabled quantization method by setting two_pass_quantize
-and colormap properly just before calling jpeg_start_output(). The following
-special rules apply:
-1. You must explicitly set cinfo.colormap to NULL when switching to 1-pass
- or 2-pass mode from a different mode, or when you want the 2-pass
- quantizer to be re-run to generate a new colormap.
-2. To switch to an external colormap, or to change to a different external
- colormap than was used on the prior pass, you must call
- jpeg_new_colormap() after setting cinfo.colormap.
-NOTE: if you want to use the same colormap as was used in the prior pass,
-you should not do either of these things. This will save some nontrivial
-switchover costs.
-(These requirements exist because cinfo.colormap will always be non-NULL
-after completing a prior output pass, since both the 1-pass and 2-pass
-quantizers set it to point to their output colormaps. Thus you have to
-do one of these two things to notify the library that something has changed.
-Yup, it's a bit klugy, but it's necessary to do it this way for backwards
-compatibility.)
-
-Note that in buffered-image mode, the library generates any requested colormap
-during jpeg_start_output(), not during jpeg_start_decompress().
-
-When using two-pass quantization, jpeg_start_output() makes a pass over the
-buffered image to determine the optimum color map; it therefore may take a
-significant amount of time, whereas ordinarily it does little work. The
-progress monitor hook is called during this pass, if defined. It is also
-important to realize that if the specified target scan number is greater than
-or equal to the current input scan number, jpeg_start_output() will attempt
-to consume input as it makes this pass. If you use a suspending data source,
-you need to check for a FALSE return from jpeg_start_output() under these
-conditions. The combination of 2-pass quantization and a not-yet-fully-read
-target scan is the only case in which jpeg_start_output() will consume input.
-
-
-Application authors who support buffered-image mode may be tempted to use it
-for all JPEG images, even single-scan ones. This will work, but it is
-inefficient: there is no need to create an image-sized coefficient buffer for
-single-scan images. Requesting buffered-image mode for such an image wastes
-memory. Worse, it can cost time on large images, since the buffered data has
-to be swapped out or written to a temporary file. If you are concerned about
-maximum performance on baseline JPEG files, you should use buffered-image
-mode only when the incoming file actually has multiple scans. This can be
-tested by calling jpeg_has_multiple_scans(), which will return a correct
-result at any time after jpeg_read_header() completes.
-
-It is also worth noting that when you use jpeg_consume_input() to let input
-processing get ahead of output processing, the resulting pattern of access to
-the coefficient buffer is quite nonsequential. It's best to use the memory
-manager jmemnobs.c if you can (ie, if you have enough real or virtual main
-memory). If not, at least make sure that max_memory_to_use is set as high as
-possible. If the JPEG memory manager has to use a temporary file, you will
-probably see a lot of disk traffic and poor performance. (This could be
-improved with additional work on the memory manager, but we haven't gotten
-around to it yet.)
-
-In some applications it may be convenient to use jpeg_consume_input() for all
-input processing, including reading the initial markers; that is, you may
-wish to call jpeg_consume_input() instead of jpeg_read_header() during
-startup. This works, but note that you must check for JPEG_REACHED_SOS and
-JPEG_REACHED_EOI return codes as the equivalent of jpeg_read_header's codes.
-Once the first SOS marker has been reached, you must call
-jpeg_start_decompress() before jpeg_consume_input() will consume more input;
-it'll just keep returning JPEG_REACHED_SOS until you do. If you read a
-tables-only file this way, jpeg_consume_input() will return JPEG_REACHED_EOI
-without ever returning JPEG_REACHED_SOS; be sure to check for this case.
-If this happens, the decompressor will not read any more input until you call
-jpeg_abort() to reset it. It is OK to call jpeg_consume_input() even when not
-using buffered-image mode, but in that case it's basically a no-op after the
-initial markers have been read: it will just return JPEG_SUSPENDED.
-
-
-Abbreviated datastreams and multiple images
--------------------------------------------
-
-A JPEG compression or decompression object can be reused to process multiple
-images. This saves a small amount of time per image by eliminating the
-"create" and "destroy" operations, but that isn't the real purpose of the
-feature. Rather, reuse of an object provides support for abbreviated JPEG
-datastreams. Object reuse can also simplify processing a series of images in
-a single input or output file. This section explains these features.
-
-A JPEG file normally contains several hundred bytes worth of quantization
-and Huffman tables. In a situation where many images will be stored or
-transmitted with identical tables, this may represent an annoying overhead.
-The JPEG standard therefore permits tables to be omitted. The standard
-defines three classes of JPEG datastreams:
- * "Interchange" datastreams contain an image and all tables needed to decode
- the image. These are the usual kind of JPEG file.
- * "Abbreviated image" datastreams contain an image, but are missing some or
- all of the tables needed to decode that image.
- * "Abbreviated table specification" (henceforth "tables-only") datastreams
- contain only table specifications.
-To decode an abbreviated image, it is necessary to load the missing table(s)
-into the decoder beforehand. This can be accomplished by reading a separate
-tables-only file. A variant scheme uses a series of images in which the first
-image is an interchange (complete) datastream, while subsequent ones are
-abbreviated and rely on the tables loaded by the first image. It is assumed
-that once the decoder has read a table, it will remember that table until a
-new definition for the same table number is encountered.
-
-It is the application designer's responsibility to figure out how to associate
-the correct tables with an abbreviated image. While abbreviated datastreams
-can be useful in a closed environment, their use is strongly discouraged in
-any situation where data exchange with other applications might be needed.
-Caveat designer.
-
-The JPEG library provides support for reading and writing any combination of
-tables-only datastreams and abbreviated images. In both compression and
-decompression objects, a quantization or Huffman table will be retained for
-the lifetime of the object, unless it is overwritten by a new table definition.
-
-
-To create abbreviated image datastreams, it is only necessary to tell the
-compressor not to emit some or all of the tables it is using. Each
-quantization and Huffman table struct contains a boolean field "sent_table",
-which normally is initialized to FALSE. For each table used by the image, the
-header-writing process emits the table and sets sent_table = TRUE unless it is
-already TRUE. (In normal usage, this prevents outputting the same table
-definition multiple times, as would otherwise occur because the chroma
-components typically share tables.) Thus, setting this field to TRUE before
-calling jpeg_start_compress() will prevent the table from being written at
-all.
-
-If you want to create a "pure" abbreviated image file containing no tables,
-just call "jpeg_suppress_tables(&cinfo, TRUE)" after constructing all the
-tables. If you want to emit some but not all tables, you'll need to set the
-individual sent_table fields directly.
-
-To create an abbreviated image, you must also call jpeg_start_compress()
-with a second parameter of FALSE, not TRUE. Otherwise jpeg_start_compress()
-will force all the sent_table fields to FALSE. (This is a safety feature to
-prevent abbreviated images from being created accidentally.)
-
-To create a tables-only file, perform the same parameter setup that you
-normally would, but instead of calling jpeg_start_compress() and so on, call
-jpeg_write_tables(&cinfo). This will write an abbreviated datastream
-containing only SOI, DQT and/or DHT markers, and EOI. All the quantization
-and Huffman tables that are currently defined in the compression object will
-be emitted unless their sent_tables flag is already TRUE, and then all the
-sent_tables flags will be set TRUE.
-
-A sure-fire way to create matching tables-only and abbreviated image files
-is to proceed as follows:
-
- create JPEG compression object
- set JPEG parameters
- set destination to tables-only file
- jpeg_write_tables(&cinfo);
- set destination to image file
- jpeg_start_compress(&cinfo, FALSE);
- write data...
- jpeg_finish_compress(&cinfo);
-
-Since the JPEG parameters are not altered between writing the table file and
-the abbreviated image file, the same tables are sure to be used. Of course,
-you can repeat the jpeg_start_compress() ... jpeg_finish_compress() sequence
-many times to produce many abbreviated image files matching the table file.
-
-You cannot suppress output of the computed Huffman tables when Huffman
-optimization is selected. (If you could, there'd be no way to decode the
-image...) Generally, you don't want to set optimize_coding = TRUE when
-you are trying to produce abbreviated files.
-
-In some cases you might want to compress an image using tables which are
-not stored in the application, but are defined in an interchange or
-tables-only file readable by the application. This can be done by setting up
-a JPEG decompression object to read the specification file, then copying the
-tables into your compression object. See jpeg_copy_critical_parameters()
-for an example of copying quantization tables.
-
-
-To read abbreviated image files, you simply need to load the proper tables
-into the decompression object before trying to read the abbreviated image.
-If the proper tables are stored in the application program, you can just
-allocate the table structs and fill in their contents directly. For example,
-to load a fixed quantization table into table slot "n":
-
- if (cinfo.quant_tbl_ptrs[n] == NULL)
- cinfo.quant_tbl_ptrs[n] = jpeg_alloc_quant_table((j_common_ptr) &cinfo);
- quant_ptr = cinfo.quant_tbl_ptrs[n]; /* quant_ptr is JQUANT_TBL* */
- for (i = 0; i < 64; i++) {
- /* Qtable[] is desired quantization table, in natural array order */
- quant_ptr->quantval[i] = Qtable[i];
- }
-
-Code to load a fixed Huffman table is typically (for AC table "n"):
-
- if (cinfo.ac_huff_tbl_ptrs[n] == NULL)
- cinfo.ac_huff_tbl_ptrs[n] = jpeg_alloc_huff_table((j_common_ptr) &cinfo);
- huff_ptr = cinfo.ac_huff_tbl_ptrs[n]; /* huff_ptr is JHUFF_TBL* */
- for (i = 1; i <= 16; i++) {
- /* counts[i] is number of Huffman codes of length i bits, i=1..16 */
- huff_ptr->bits[i] = counts[i];
- }
- for (i = 0; i < 256; i++) {
- /* symbols[] is the list of Huffman symbols, in code-length order */
- huff_ptr->huffval[i] = symbols[i];
- }
-
-(Note that trying to set cinfo.quant_tbl_ptrs[n] to point directly at a
-constant JQUANT_TBL object is not safe. If the incoming file happened to
-contain a quantization table definition, your master table would get
-overwritten! Instead allocate a working table copy and copy the master table
-into it, as illustrated above. Ditto for Huffman tables, of course.)
-
-You might want to read the tables from a tables-only file, rather than
-hard-wiring them into your application. The jpeg_read_header() call is
-sufficient to read a tables-only file. You must pass a second parameter of
-FALSE to indicate that you do not require an image to be present. Thus, the
-typical scenario is
-
- create JPEG decompression object
- set source to tables-only file
- jpeg_read_header(&cinfo, FALSE);
- set source to abbreviated image file
- jpeg_read_header(&cinfo, TRUE);
- set decompression parameters
- jpeg_start_decompress(&cinfo);
- read data...
- jpeg_finish_decompress(&cinfo);
-
-In some cases, you may want to read a file without knowing whether it contains
-an image or just tables. In that case, pass FALSE and check the return value
-from jpeg_read_header(): it will be JPEG_HEADER_OK if an image was found,
-JPEG_HEADER_TABLES_ONLY if only tables were found. (A third return value,
-JPEG_SUSPENDED, is possible when using a suspending data source manager.)
-Note that jpeg_read_header() will not complain if you read an abbreviated
-image for which you haven't loaded the missing tables; the missing-table check
-occurs later, in jpeg_start_decompress().
-
-
-It is possible to read a series of images from a single source file by
-repeating the jpeg_read_header() ... jpeg_finish_decompress() sequence,
-without releasing/recreating the JPEG object or the data source module.
-(If you did reinitialize, any partial bufferload left in the data source
-buffer at the end of one image would be discarded, causing you to lose the
-start of the next image.) When you use this method, stored tables are
-automatically carried forward, so some of the images can be abbreviated images
-that depend on tables from earlier images.
-
-If you intend to write a series of images into a single destination file,
-you might want to make a specialized data destination module that doesn't
-flush the output buffer at term_destination() time. This would speed things
-up by some trifling amount. Of course, you'd need to remember to flush the
-buffer after the last image. You can make the later images be abbreviated
-ones by passing FALSE to jpeg_start_compress().
-
-
-Special markers
----------------
-
-Some applications may need to insert or extract special data in the JPEG
-datastream. The JPEG standard provides marker types "COM" (comment) and
-"APP0" through "APP15" (application) to hold application-specific data.
-Unfortunately, the use of these markers is not specified by the standard.
-COM markers are fairly widely used to hold user-supplied text. The JFIF file
-format spec uses APP0 markers with specified initial strings to hold certain
-data. Adobe applications use APP14 markers beginning with the string "Adobe"
-for miscellaneous data. Other APPn markers are rarely seen, but might
-contain almost anything.
-
-If you wish to store user-supplied text, we recommend you use COM markers
-and place readable 7-bit ASCII text in them. Newline conventions are not
-standardized --- expect to find LF (Unix style), CR/LF (DOS style), or CR
-(Mac style). A robust COM reader should be able to cope with random binary
-garbage, including nulls, since some applications generate COM markers
-containing non-ASCII junk. (But yours should not be one of them.)
-
-For program-supplied data, use an APPn marker, and be sure to begin it with an
-identifying string so that you can tell whether the marker is actually yours.
-It's probably best to avoid using APP0 or APP14 for any private markers.
-(NOTE: the upcoming SPIFF standard will use APP8 markers; we recommend you
-not use APP8 markers for any private purposes, either.)
-
-Keep in mind that at most 65533 bytes can be put into one marker, but you
-can have as many markers as you like.
-
-By default, the IJG compression library will write a JFIF APP0 marker if the
-selected JPEG colorspace is grayscale or YCbCr, or an Adobe APP14 marker if
-the selected colorspace is RGB, CMYK, or YCCK. You can disable this, but
-we don't recommend it. The decompression library will recognize JFIF and
-Adobe markers and will set the JPEG colorspace properly when one is found.
-
-
-You can write special markers immediately following the datastream header by
-calling jpeg_write_marker() after jpeg_start_compress() and before the first
-call to jpeg_write_scanlines(). When you do this, the markers appear after
-the SOI and the JFIF APP0 and Adobe APP14 markers (if written), but before
-all else. Specify the marker type parameter as "JPEG_COM" for COM or
-"JPEG_APP0 + n" for APPn. (Actually, jpeg_write_marker will let you write
-any marker type, but we don't recommend writing any other kinds of marker.)
-For example, to write a user comment string pointed to by comment_text:
- jpeg_write_marker(cinfo, JPEG_COM, comment_text, strlen(comment_text));
-
-If it's not convenient to store all the marker data in memory at once,
-you can instead call jpeg_write_m_header() followed by multiple calls to
-jpeg_write_m_byte(). If you do it this way, it's your responsibility to
-call jpeg_write_m_byte() exactly the number of times given in the length
-parameter to jpeg_write_m_header(). (This method lets you empty the
-output buffer partway through a marker, which might be important when
-using a suspending data destination module. In any case, if you are using
-a suspending destination, you should flush its buffer after inserting
-any special markers. See "I/O suspension".)
-
-Or, if you prefer to synthesize the marker byte sequence yourself,
-you can just cram it straight into the data destination module.
-
-If you are writing JFIF 1.02 extension markers (thumbnail images), don't
-forget to set cinfo.JFIF_minor_version = 2 so that the encoder will write the
-correct JFIF version number in the JFIF header marker. The library's default
-is to write version 1.01, but that's wrong if you insert any 1.02 extension
-markers. (We could probably get away with just defaulting to 1.02, but there
-used to be broken decoders that would complain about unknown minor version
-numbers. To reduce compatibility risks it's safest not to write 1.02 unless
-you are actually using 1.02 extensions.)
-
-
-When reading, two methods of handling special markers are available:
-1. You can ask the library to save the contents of COM and/or APPn markers
-into memory, and then examine them at your leisure afterwards.
-2. You can supply your own routine to process COM and/or APPn markers
-on-the-fly as they are read.
-The first method is simpler to use, especially if you are using a suspending
-data source; writing a marker processor that copes with input suspension is
-not easy (consider what happens if the marker is longer than your available
-input buffer). However, the second method conserves memory since the marker
-data need not be kept around after it's been processed.
-
-For either method, you'd normally set up marker handling after creating a
-decompression object and before calling jpeg_read_header(), because the
-markers of interest will typically be near the head of the file and so will
-be scanned by jpeg_read_header. Once you've established a marker handling
-method, it will be used for the life of that decompression object
-(potentially many datastreams), unless you change it. Marker handling is
-determined separately for COM markers and for each APPn marker code.
-
-
-To save the contents of special markers in memory, call
- jpeg_save_markers(cinfo, marker_code, length_limit)
-where marker_code is the marker type to save, JPEG_COM or JPEG_APP0+n.
-(To arrange to save all the special marker types, you need to call this
-routine 17 times, for COM and APP0-APP15.) If the incoming marker is longer
-than length_limit data bytes, only length_limit bytes will be saved; this
-parameter allows you to avoid chewing up memory when you only need to see the
-first few bytes of a potentially large marker. If you want to save all the
-data, set length_limit to 0xFFFF; that is enough since marker lengths are only
-16 bits. As a special case, setting length_limit to 0 prevents that marker
-type from being saved at all. (That is the default behavior, in fact.)
-
-After jpeg_read_header() completes, you can examine the special markers by
-following the cinfo->marker_list pointer chain. All the special markers in
-the file appear in this list, in order of their occurrence in the file (but
-omitting any markers of types you didn't ask for). Both the original data
-length and the saved data length are recorded for each list entry; the latter
-will not exceed length_limit for the particular marker type. Note that these
-lengths exclude the marker length word, whereas the stored representation
-within the JPEG file includes it. (Hence the maximum data length is really
-only 65533.)
-
-It is possible that additional special markers appear in the file beyond the
-SOS marker at which jpeg_read_header stops; if so, the marker list will be
-extended during reading of the rest of the file. This is not expected to be
-common, however. If you are short on memory you may want to reset the length
-limit to zero for all marker types after finishing jpeg_read_header, to
-ensure that the max_memory_to_use setting cannot be exceeded due to addition
-of later markers.
-
-The marker list remains stored until you call jpeg_finish_decompress or
-jpeg_abort, at which point the memory is freed and the list is set to empty.
-(jpeg_destroy also releases the storage, of course.)
-
-Note that the library is internally interested in APP0 and APP14 markers;
-if you try to set a small nonzero length limit on these types, the library
-will silently force the length up to the minimum it wants. (But you can set
-a zero length limit to prevent them from being saved at all.) Also, in a
-16-bit environment, the maximum length limit may be constrained to less than
-65533 by malloc() limitations. It is therefore best not to assume that the
-effective length limit is exactly what you set it to be.
-
-
-If you want to supply your own marker-reading routine, you do it by calling
-jpeg_set_marker_processor(). A marker processor routine must have the
-signature
- boolean jpeg_marker_parser_method (j_decompress_ptr cinfo)
-Although the marker code is not explicitly passed, the routine can find it
-in cinfo->unread_marker. At the time of call, the marker proper has been
-read from the data source module. The processor routine is responsible for
-reading the marker length word and the remaining parameter bytes, if any.
-Return TRUE to indicate success. (FALSE should be returned only if you are
-using a suspending data source and it tells you to suspend. See the standard
-marker processors in jdmarker.c for appropriate coding methods if you need to
-use a suspending data source.)
-
-If you override the default APP0 or APP14 processors, it is up to you to
-recognize JFIF and Adobe markers if you want colorspace recognition to occur
-properly. We recommend copying and extending the default processors if you
-want to do that. (A better idea is to save these marker types for later
-examination by calling jpeg_save_markers(); that method doesn't interfere
-with the library's own processing of these markers.)
-
-jpeg_set_marker_processor() and jpeg_save_markers() are mutually exclusive
---- if you call one it overrides any previous call to the other, for the
-particular marker type specified.
-
-A simple example of an external COM processor can be found in djpeg.c.
-Also, see jpegtran.c for an example of using jpeg_save_markers.
-
-
-Raw (downsampled) image data
-----------------------------
-
-Some applications need to supply already-downsampled image data to the JPEG
-compressor, or to receive raw downsampled data from the decompressor. The
-library supports this requirement by allowing the application to write or
-read raw data, bypassing the normal preprocessing or postprocessing steps.
-The interface is different from the standard one and is somewhat harder to
-use. If your interest is merely in bypassing color conversion, we recommend
-that you use the standard interface and simply set jpeg_color_space =
-in_color_space (or jpeg_color_space = out_color_space for decompression).
-The mechanism described in this section is necessary only to supply or
-receive downsampled image data, in which not all components have the same
-dimensions.
-
-
-To compress raw data, you must supply the data in the colorspace to be used
-in the JPEG file (please read the earlier section on Special color spaces)
-and downsampled to the sampling factors specified in the JPEG parameters.
-You must supply the data in the format used internally by the JPEG library,
-namely a JSAMPIMAGE array. This is an array of pointers to two-dimensional
-arrays, each of type JSAMPARRAY. Each 2-D array holds the values for one
-color component. This structure is necessary since the components are of
-different sizes. If the image dimensions are not a multiple of the MCU size,
-you must also pad the data correctly (usually, this is done by replicating
-the last column and/or row). The data must be padded to a multiple of a DCT
-block in each component: that is, each downsampled row must contain a
-multiple of 8 valid samples, and there must be a multiple of 8 sample rows
-for each component. (For applications such as conversion of digital TV
-images, the standard image size is usually a multiple of the DCT block size,
-so that no padding need actually be done.)
-
-The procedure for compression of raw data is basically the same as normal
-compression, except that you call jpeg_write_raw_data() in place of
-jpeg_write_scanlines(). Before calling jpeg_start_compress(), you must do
-the following:
- * Set cinfo->raw_data_in to TRUE. (It is set FALSE by jpeg_set_defaults().)
- This notifies the library that you will be supplying raw data.
- * Ensure jpeg_color_space is correct --- an explicit jpeg_set_colorspace()
- call is a good idea. Note that since color conversion is bypassed,
- in_color_space is ignored, except that jpeg_set_defaults() uses it to
- choose the default jpeg_color_space setting.
- * Ensure the sampling factors, cinfo->comp_info[i].h_samp_factor and
- cinfo->comp_info[i].v_samp_factor, are correct. Since these indicate the
- dimensions of the data you are supplying, it's wise to set them
- explicitly, rather than assuming the library's defaults are what you want.
-
-To pass raw data to the library, call jpeg_write_raw_data() in place of
-jpeg_write_scanlines(). The two routines work similarly except that
-jpeg_write_raw_data takes a JSAMPIMAGE data array rather than JSAMPARRAY.
-The scanlines count passed to and returned from jpeg_write_raw_data is
-measured in terms of the component with the largest v_samp_factor.
-
-jpeg_write_raw_data() processes one MCU row per call, which is to say
-v_samp_factor*DCTSIZE sample rows of each component. The passed num_lines
-value must be at least max_v_samp_factor*DCTSIZE, and the return value will
-be exactly that amount (or possibly some multiple of that amount, in future
-library versions). This is true even on the last call at the bottom of the
-image; don't forget to pad your data as necessary.
-
-The required dimensions of the supplied data can be computed for each
-component as
- cinfo->comp_info[i].width_in_blocks*DCTSIZE samples per row
- cinfo->comp_info[i].height_in_blocks*DCTSIZE rows in image
-after jpeg_start_compress() has initialized those fields. If the valid data
-is smaller than this, it must be padded appropriately. For some sampling
-factors and image sizes, additional dummy DCT blocks are inserted to make
-the image a multiple of the MCU dimensions. The library creates such dummy
-blocks itself; it does not read them from your supplied data. Therefore you
-need never pad by more than DCTSIZE samples. An example may help here.
-Assume 2h2v downsampling of YCbCr data, that is
- cinfo->comp_info[0].h_samp_factor = 2 for Y
- cinfo->comp_info[0].v_samp_factor = 2
- cinfo->comp_info[1].h_samp_factor = 1 for Cb
- cinfo->comp_info[1].v_samp_factor = 1
- cinfo->comp_info[2].h_samp_factor = 1 for Cr
- cinfo->comp_info[2].v_samp_factor = 1
-and suppose that the nominal image dimensions (cinfo->image_width and
-cinfo->image_height) are 101x101 pixels. Then jpeg_start_compress() will
-compute downsampled_width = 101 and width_in_blocks = 13 for Y,
-downsampled_width = 51 and width_in_blocks = 7 for Cb and Cr (and the same
-for the height fields). You must pad the Y data to at least 13*8 = 104
-columns and rows, the Cb/Cr data to at least 7*8 = 56 columns and rows. The
-MCU height is max_v_samp_factor = 2 DCT rows so you must pass at least 16
-scanlines on each call to jpeg_write_raw_data(), which is to say 16 actual
-sample rows of Y and 8 each of Cb and Cr. A total of 7 MCU rows are needed,
-so you must pass a total of 7*16 = 112 "scanlines". The last DCT block row
-of Y data is dummy, so it doesn't matter what you pass for it in the data
-arrays, but the scanlines count must total up to 112 so that all of the Cb
-and Cr data gets passed.
-
-Output suspension is supported with raw-data compression: if the data
-destination module suspends, jpeg_write_raw_data() will return 0.
-In this case the same data rows must be passed again on the next call.
-
-
-Decompression with raw data output implies bypassing all postprocessing:
-you cannot ask for rescaling or color quantization, for instance. More
-seriously, you must deal with the color space and sampling factors present in
-the incoming file. If your application only handles, say, 2h1v YCbCr data,
-you must check for and fail on other color spaces or other sampling factors.
-The library will not convert to a different color space for you.
-
-To obtain raw data output, set cinfo->raw_data_out = TRUE before
-jpeg_start_decompress() (it is set FALSE by jpeg_read_header()). Be sure to
-verify that the color space and sampling factors are ones you can handle.
-Then call jpeg_read_raw_data() in place of jpeg_read_scanlines(). The
-decompression process is otherwise the same as usual.
-
-jpeg_read_raw_data() returns one MCU row per call, and thus you must pass a
-buffer of at least max_v_samp_factor*DCTSIZE scanlines (scanline counting is
-the same as for raw-data compression). The buffer you pass must be large
-enough to hold the actual data plus padding to DCT-block boundaries. As with
-compression, any entirely dummy DCT blocks are not processed so you need not
-allocate space for them, but the total scanline count includes them. The
-above example of computing buffer dimensions for raw-data compression is
-equally valid for decompression.
-
-Input suspension is supported with raw-data decompression: if the data source
-module suspends, jpeg_read_raw_data() will return 0. You can also use
-buffered-image mode to read raw data in multiple passes.
-
-
-Really raw data: DCT coefficients
----------------------------------
-
-It is possible to read or write the contents of a JPEG file as raw DCT
-coefficients. This facility is mainly intended for use in lossless
-transcoding between different JPEG file formats. Other possible applications
-include lossless cropping of a JPEG image, lossless reassembly of a
-multi-strip or multi-tile TIFF/JPEG file into a single JPEG datastream, etc.
-
-To read the contents of a JPEG file as DCT coefficients, open the file and do
-jpeg_read_header() as usual. But instead of calling jpeg_start_decompress()
-and jpeg_read_scanlines(), call jpeg_read_coefficients(). This will read the
-entire image into a set of virtual coefficient-block arrays, one array per
-component. The return value is a pointer to an array of virtual-array
-descriptors. Each virtual array can be accessed directly using the JPEG
-memory manager's access_virt_barray method (see Memory management, below,
-and also read structure.doc's discussion of virtual array handling). Or,
-for simple transcoding to a different JPEG file format, the array list can
-just be handed directly to jpeg_write_coefficients().
-
-Each block in the block arrays contains quantized coefficient values in
-normal array order (not JPEG zigzag order). The block arrays contain only
-DCT blocks containing real data; any entirely-dummy blocks added to fill out
-interleaved MCUs at the right or bottom edges of the image are discarded
-during reading and are not stored in the block arrays. (The size of each
-block array can be determined from the width_in_blocks and height_in_blocks
-fields of the component's comp_info entry.) This is also the data format
-expected by jpeg_write_coefficients().
-
-When you are done using the virtual arrays, call jpeg_finish_decompress()
-to release the array storage and return the decompression object to an idle
-state; or just call jpeg_destroy() if you don't need to reuse the object.
-
-If you use a suspending data source, jpeg_read_coefficients() will return
-NULL if it is forced to suspend; a non-NULL return value indicates successful
-completion. You need not test for a NULL return value when using a
-non-suspending data source.
-
-It is also possible to call jpeg_read_coefficients() to obtain access to the
-decoder's coefficient arrays during a normal decode cycle in buffered-image
-mode. This frammish might be useful for progressively displaying an incoming
-image and then re-encoding it without loss. To do this, decode in buffered-
-image mode as discussed previously, then call jpeg_read_coefficients() after
-the last jpeg_finish_output() call. The arrays will be available for your use
-until you call jpeg_finish_decompress().
-
-
-To write the contents of a JPEG file as DCT coefficients, you must provide
-the DCT coefficients stored in virtual block arrays. You can either pass
-block arrays read from an input JPEG file by jpeg_read_coefficients(), or
-allocate virtual arrays from the JPEG compression object and fill them
-yourself. In either case, jpeg_write_coefficients() is substituted for
-jpeg_start_compress() and jpeg_write_scanlines(). Thus the sequence is
- * Create compression object
- * Set all compression parameters as necessary
- * Request virtual arrays if needed
- * jpeg_write_coefficients()
- * jpeg_finish_compress()
- * Destroy or re-use compression object
-jpeg_write_coefficients() is passed a pointer to an array of virtual block
-array descriptors; the number of arrays is equal to cinfo.num_components.
-
-The virtual arrays need only have been requested, not realized, before
-jpeg_write_coefficients() is called. A side-effect of
-jpeg_write_coefficients() is to realize any virtual arrays that have been
-requested from the compression object's memory manager. Thus, when obtaining
-the virtual arrays from the compression object, you should fill the arrays
-after calling jpeg_write_coefficients(). The data is actually written out
-when you call jpeg_finish_compress(); jpeg_write_coefficients() only writes
-the file header.
-
-When writing raw DCT coefficients, it is crucial that the JPEG quantization
-tables and sampling factors match the way the data was encoded, or the
-resulting file will be invalid. For transcoding from an existing JPEG file,
-we recommend using jpeg_copy_critical_parameters(). This routine initializes
-all the compression parameters to default values (like jpeg_set_defaults()),
-then copies the critical information from a source decompression object.
-The decompression object should have just been used to read the entire
-JPEG input file --- that is, it should be awaiting jpeg_finish_decompress().
-
-jpeg_write_coefficients() marks all tables stored in the compression object
-as needing to be written to the output file (thus, it acts like
-jpeg_start_compress(cinfo, TRUE)). This is for safety's sake, to avoid
-emitting abbreviated JPEG files by accident. If you really want to emit an
-abbreviated JPEG file, call jpeg_suppress_tables(), or set the tables'
-individual sent_table flags, between calling jpeg_write_coefficients() and
-jpeg_finish_compress().
-
-
-Progress monitoring
--------------------
-
-Some applications may need to regain control from the JPEG library every so
-often. The typical use of this feature is to produce a percent-done bar or
-other progress display. (For a simple example, see cjpeg.c or djpeg.c.)
-Although you do get control back frequently during the data-transferring pass
-(the jpeg_read_scanlines or jpeg_write_scanlines loop), any additional passes
-will occur inside jpeg_finish_compress or jpeg_start_decompress; those
-routines may take a long time to execute, and you don't get control back
-until they are done.
-
-You can define a progress-monitor routine which will be called periodically
-by the library. No guarantees are made about how often this call will occur,
-so we don't recommend you use it for mouse tracking or anything like that.
-At present, a call will occur once per MCU row, scanline, or sample row
-group, whichever unit is convenient for the current processing mode; so the
-wider the image, the longer the time between calls. During the data
-transferring pass, only one call occurs per call of jpeg_read_scanlines or
-jpeg_write_scanlines, so don't pass a large number of scanlines at once if
-you want fine resolution in the progress count. (If you really need to use
-the callback mechanism for time-critical tasks like mouse tracking, you could
-insert additional calls inside some of the library's inner loops.)
-
-To establish a progress-monitor callback, create a struct jpeg_progress_mgr,
-fill in its progress_monitor field with a pointer to your callback routine,
-and set cinfo->progress to point to the struct. The callback will be called
-whenever cinfo->progress is non-NULL. (This pointer is set to NULL by
-jpeg_create_compress or jpeg_create_decompress; the library will not change
-it thereafter. So if you allocate dynamic storage for the progress struct,
-make sure it will live as long as the JPEG object does. Allocating from the
-JPEG memory manager with lifetime JPOOL_PERMANENT will work nicely.) You
-can use the same callback routine for both compression and decompression.
-
-The jpeg_progress_mgr struct contains four fields which are set by the library:
- long pass_counter; /* work units completed in this pass */
- long pass_limit; /* total number of work units in this pass */
- int completed_passes; /* passes completed so far */
- int total_passes; /* total number of passes expected */
-During any one pass, pass_counter increases from 0 up to (not including)
-pass_limit; the step size is usually but not necessarily 1. The pass_limit
-value may change from one pass to another. The expected total number of
-passes is in total_passes, and the number of passes already completed is in
-completed_passes. Thus the fraction of work completed may be estimated as
- completed_passes + (pass_counter/pass_limit)
- --------------------------------------------
- total_passes
-ignoring the fact that the passes may not be equal amounts of work.
-
-When decompressing, pass_limit can even change within a pass, because it
-depends on the number of scans in the JPEG file, which isn't always known in
-advance. The computed fraction-of-work-done may jump suddenly (if the library
-discovers it has overestimated the number of scans) or even decrease (in the
-opposite case). It is not wise to put great faith in the work estimate.
-
-When using the decompressor's buffered-image mode, the progress monitor work
-estimate is likely to be completely unhelpful, because the library has no way
-to know how many output passes will be demanded of it. Currently, the library
-sets total_passes based on the assumption that there will be one more output
-pass if the input file end hasn't yet been read (jpeg_input_complete() isn't
-TRUE), but no more output passes if the file end has been reached when the
-output pass is started. This means that total_passes will rise as additional
-output passes are requested. If you have a way of determining the input file
-size, estimating progress based on the fraction of the file that's been read
-will probably be more useful than using the library's value.
-
-
-Memory management
------------------
-
-This section covers some key facts about the JPEG library's built-in memory
-manager. For more info, please read structure.doc's section about the memory
-manager, and consult the source code if necessary.
-
-All memory and temporary file allocation within the library is done via the
-memory manager. If necessary, you can replace the "back end" of the memory
-manager to control allocation yourself (for example, if you don't want the
-library to use malloc() and free() for some reason).
-
-Some data is allocated "permanently" and will not be freed until the JPEG
-object is destroyed. Most data is allocated "per image" and is freed by
-jpeg_finish_compress, jpeg_finish_decompress, or jpeg_abort. You can call the
-memory manager yourself to allocate structures that will automatically be
-freed at these times. Typical code for this is
- ptr = (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, size);
-Use JPOOL_PERMANENT to get storage that lasts as long as the JPEG object.
-Use alloc_large instead of alloc_small for anything bigger than a few Kbytes.
-There are also alloc_sarray and alloc_barray routines that automatically
-build 2-D sample or block arrays.
-
-The library's minimum space requirements to process an image depend on the
-image's width, but not on its height, because the library ordinarily works
-with "strip" buffers that are as wide as the image but just a few rows high.
-Some operating modes (eg, two-pass color quantization) require full-image
-buffers. Such buffers are treated as "virtual arrays": only the current strip
-need be in memory, and the rest can be swapped out to a temporary file.
-
-If you use the simplest memory manager back end (jmemnobs.c), then no
-temporary files are used; virtual arrays are simply malloc()'d. Images bigger
-than memory can be processed only if your system supports virtual memory.
-The other memory manager back ends support temporary files of various flavors
-and thus work in machines without virtual memory. They may also be useful on
-Unix machines if you need to process images that exceed available swap space.
-
-When using temporary files, the library will make the in-memory buffers for
-its virtual arrays just big enough to stay within a "maximum memory" setting.
-Your application can set this limit by setting cinfo->mem->max_memory_to_use
-after creating the JPEG object. (Of course, there is still a minimum size for
-the buffers, so the max-memory setting is effective only if it is bigger than
-the minimum space needed.) If you allocate any large structures yourself, you
-must allocate them before jpeg_start_compress() or jpeg_start_decompress() in
-order to have them counted against the max memory limit. Also keep in mind
-that space allocated with alloc_small() is ignored, on the assumption that
-it's too small to be worth worrying about; so a reasonable safety margin
-should be left when setting max_memory_to_use.
-
-If you use the jmemname.c or jmemdos.c memory manager back end, it is
-important to clean up the JPEG object properly to ensure that the temporary
-files get deleted. (This is especially crucial with jmemdos.c, where the
-"temporary files" may be extended-memory segments; if they are not freed,
-DOS will require a reboot to recover the memory.) Thus, with these memory
-managers, it's a good idea to provide a signal handler that will trap any
-early exit from your program. The handler should call either jpeg_abort()
-or jpeg_destroy() for any active JPEG objects. A handler is not needed with
-jmemnobs.c, and shouldn't be necessary with jmemansi.c or jmemmac.c either,
-since the C library is supposed to take care of deleting files made with
-tmpfile().
-
-
-Memory usage
-------------
-
-Working memory requirements while performing compression or decompression
-depend on image dimensions, image characteristics (such as colorspace and
-JPEG process), and operating mode (application-selected options).
-
-As of v6b, the decompressor requires:
- 1. About 24K in more-or-less-fixed-size data. This varies a bit depending
- on operating mode and image characteristics (particularly color vs.
- grayscale), but it doesn't depend on image dimensions.
- 2. Strip buffers (of size proportional to the image width) for IDCT and
- upsampling results. The worst case for commonly used sampling factors
- is about 34 bytes * width in pixels for a color image. A grayscale image
- only needs about 8 bytes per pixel column.
- 3. A full-image DCT coefficient buffer is needed to decode a multi-scan JPEG
- file (including progressive JPEGs), or whenever you select buffered-image
- mode. This takes 2 bytes/coefficient. At typical 2x2 sampling, that's
- 3 bytes per pixel for a color image. Worst case (1x1 sampling) requires
- 6 bytes/pixel. For grayscale, figure 2 bytes/pixel.
- 4. To perform 2-pass color quantization, the decompressor also needs a
- 128K color lookup table and a full-image pixel buffer (3 bytes/pixel).
-This does not count any memory allocated by the application, such as a
-buffer to hold the final output image.
-
-The above figures are valid for 8-bit JPEG data precision and a machine with
-32-bit ints. For 12-bit JPEG data, double the size of the strip buffers and
-quantization pixel buffer. The "fixed-size" data will be somewhat smaller
-with 16-bit ints, larger with 64-bit ints. Also, CMYK or other unusual
-color spaces will require different amounts of space.
-
-The full-image coefficient and pixel buffers, if needed at all, do not
-have to be fully RAM resident; you can have the library use temporary
-files instead when the total memory usage would exceed a limit you set.
-(But if your OS supports virtual memory, it's probably better to just use
-jmemnobs and let the OS do the swapping.)
-
-The compressor's memory requirements are similar, except that it has no need
-for color quantization. Also, it needs a full-image DCT coefficient buffer
-if Huffman-table optimization is asked for, even if progressive mode is not
-requested.
-
-If you need more detailed information about memory usage in a particular
-situation, you can enable the MEM_STATS code in jmemmgr.c.
-
-
-Library compile-time options
-----------------------------
-
-A number of compile-time options are available by modifying jmorecfg.h.
-
-The JPEG standard provides for both the baseline 8-bit DCT process and
-a 12-bit DCT process. The IJG code supports 12-bit lossy JPEG if you define
-BITS_IN_JSAMPLE as 12 rather than 8. Note that this causes JSAMPLE to be
-larger than a char, so it affects the surrounding application's image data.
-The sample applications cjpeg and djpeg can support 12-bit mode only for PPM
-and GIF file formats; you must disable the other file formats to compile a
-12-bit cjpeg or djpeg. (install.doc has more information about that.)
-At present, a 12-bit library can handle *only* 12-bit images, not both
-precisions. (If you need to include both 8- and 12-bit libraries in a single
-application, you could probably do it by defining NEED_SHORT_EXTERNAL_NAMES
-for just one of the copies. You'd have to access the 8-bit and 12-bit copies
-from separate application source files. This is untested ... if you try it,
-we'd like to hear whether it works!)
-
-Note that a 12-bit library always compresses in Huffman optimization mode,
-in order to generate valid Huffman tables. This is necessary because our
-default Huffman tables only cover 8-bit data. If you need to output 12-bit
-files in one pass, you'll have to supply suitable default Huffman tables.
-You may also want to supply your own DCT quantization tables; the existing
-quality-scaling code has been developed for 8-bit use, and probably doesn't
-generate especially good tables for 12-bit.
-
-The maximum number of components (color channels) in the image is determined
-by MAX_COMPONENTS. The JPEG standard allows up to 255 components, but we
-expect that few applications will need more than four or so.
-
-On machines with unusual data type sizes, you may be able to improve
-performance or reduce memory space by tweaking the various typedefs in
-jmorecfg.h. In particular, on some RISC CPUs, access to arrays of "short"s
-is quite slow; consider trading memory for speed by making JCOEF, INT16, and
-UINT16 be "int" or "unsigned int". UINT8 is also a candidate to become int.
-You probably don't want to make JSAMPLE be int unless you have lots of memory
-to burn.
-
-You can reduce the size of the library by compiling out various optional
-functions. To do this, undefine xxx_SUPPORTED symbols as necessary.
-
-You can also save a few K by not having text error messages in the library;
-the standard error message table occupies about 5Kb. This is particularly
-reasonable for embedded applications where there's no good way to display
-a message anyway. To do this, remove the creation of the message table
-(jpeg_std_message_table[]) from jerror.c, and alter format_message to do
-something reasonable without it. You could output the numeric value of the
-message code number, for example. If you do this, you can also save a couple
-more K by modifying the TRACEMSn() macros in jerror.h to expand to nothing;
-you don't need trace capability anyway, right?
-
-
-Portability considerations
---------------------------
-
-The JPEG library has been written to be extremely portable; the sample
-applications cjpeg and djpeg are slightly less so. This section summarizes
-the design goals in this area. (If you encounter any bugs that cause the
-library to be less portable than is claimed here, we'd appreciate hearing
-about them.)
-
-The code works fine on ANSI C, C++, and pre-ANSI C compilers, using any of
-the popular system include file setups, and some not-so-popular ones too.
-See install.doc for configuration procedures.
-
-The code is not dependent on the exact sizes of the C data types. As
-distributed, we make the assumptions that
- char is at least 8 bits wide
- short is at least 16 bits wide
- int is at least 16 bits wide
- long is at least 32 bits wide
-(These are the minimum requirements of the ANSI C standard.) Wider types will
-work fine, although memory may be used inefficiently if char is much larger
-than 8 bits or short is much bigger than 16 bits. The code should work
-equally well with 16- or 32-bit ints.
-
-In a system where these assumptions are not met, you may be able to make the
-code work by modifying the typedefs in jmorecfg.h. However, you will probably
-have difficulty if int is less than 16 bits wide, since references to plain
-int abound in the code.
-
-char can be either signed or unsigned, although the code runs faster if an
-unsigned char type is available. If char is wider than 8 bits, you will need
-to redefine JOCTET and/or provide custom data source/destination managers so
-that JOCTET represents exactly 8 bits of data on external storage.
-
-The JPEG library proper does not assume ASCII representation of characters.
-But some of the image file I/O modules in cjpeg/djpeg do have ASCII
-dependencies in file-header manipulation; so does cjpeg's select_file_type()
-routine.
-
-The JPEG library does not rely heavily on the C library. In particular, C
-stdio is used only by the data source/destination modules and the error
-handler, all of which are application-replaceable. (cjpeg/djpeg are more
-heavily dependent on stdio.) malloc and free are called only from the memory
-manager "back end" module, so you can use a different memory allocator by
-replacing that one file.
-
-The code generally assumes that C names must be unique in the first 15
-characters. However, global function names can be made unique in the
-first 6 characters by defining NEED_SHORT_EXTERNAL_NAMES.
-
-More info about porting the code may be gleaned by reading jconfig.doc,
-jmorecfg.h, and jinclude.h.
-
-
-Notes for MS-DOS implementors
------------------------------
-
-The IJG code is designed to work efficiently in 80x86 "small" or "medium"
-memory models (i.e., data pointers are 16 bits unless explicitly declared
-"far"; code pointers can be either size). You may be able to use small
-model to compile cjpeg or djpeg by itself, but you will probably have to use
-medium model for any larger application. This won't make much difference in
-performance. You *will* take a noticeable performance hit if you use a
-large-data memory model (perhaps 10%-25%), and you should avoid "huge" model
-if at all possible.
-
-The JPEG library typically needs 2Kb-3Kb of stack space. It will also
-malloc about 20K-30K of near heap space while executing (and lots of far
-heap, but that doesn't count in this calculation). This figure will vary
-depending on selected operating mode, and to a lesser extent on image size.
-There is also about 5Kb-6Kb of constant data which will be allocated in the
-near data segment (about 4Kb of this is the error message table).
-Thus you have perhaps 20K available for other modules' static data and near
-heap space before you need to go to a larger memory model. The C library's
-static data will account for several K of this, but that still leaves a good
-deal for your needs. (If you are tight on space, you could reduce the sizes
-of the I/O buffers allocated by jdatasrc.c and jdatadst.c, say from 4K to
-1K. Another possibility is to move the error message table to far memory;
-this should be doable with only localized hacking on jerror.c.)
-
-About 2K of the near heap space is "permanent" memory that will not be
-released until you destroy the JPEG object. This is only an issue if you
-save a JPEG object between compression or decompression operations.
-
-Far data space may also be a tight resource when you are dealing with large
-images. The most memory-intensive case is decompression with two-pass color
-quantization, or single-pass quantization to an externally supplied color
-map. This requires a 128Kb color lookup table plus strip buffers amounting
-to about 40 bytes per column for typical sampling ratios (eg, about 25600
-bytes for a 640-pixel-wide image). You may not be able to process wide
-images if you have large data structures of your own.
-
-Of course, all of these concerns vanish if you use a 32-bit flat-memory-model
-compiler, such as DJGPP or Watcom C. We highly recommend flat model if you
-can use it; the JPEG library is significantly faster in flat model.
+++ /dev/null
-#! /bin/sh
-
-# ltconfig - Create a system-specific libtool.
-# Copyright (C) 1996-1998 Free Software Foundation, Inc.
-# Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
-#
-# This file is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# As a special exception to the GNU General Public License, if you
-# distribute this file as part of a program that contains a
-# configuration script generated by Autoconf, you may include it under
-# the same distribution terms that you use for the rest of that program.
-
-# A lot of this script is taken from autoconf-2.10.
-
-# The HP-UX ksh and POSIX shell print the target directory to stdout
-# if CDPATH is set.
-if test "${CDPATH+set}" = set; then CDPATH=; export CDPATH; fi
-
-echo=echo
-if test "X`($echo '\t') 2>/dev/null`" = 'X\t'; then :
-else
- # The Solaris and AIX default echo program unquotes backslashes.
- # This makes it impossible to quote backslashes using
- # echo "$something" | sed 's/\\/\\\\/g'
- # So, we emulate echo with printf '%s\n'
- echo="printf %s\\n"
- if test "X`($echo '\t') 2>/dev/null`" = 'X\t'; then :
- else
- # Oops. We have no working printf. Try to find a not-so-buggy echo.
- echo=echo
- IFS="${IFS= }"; save_ifs="$IFS"; IFS="${IFS}:"
- for dir in $PATH /usr/ucb; do
- if test -f $dir/echo && test "X`$dir/echo '\t'`" = 'X\t'; then
- echo="$dir/echo"
- break
- fi
- done
- IFS="$save_ifs"
- fi
-fi
-
-# Sed substitution that helps us do robust quoting. It backslashifies
-# metacharacters that are still active within double-quoted strings.
-Xsed='sed -e s/^X//'
-sed_quote_subst='s/\([\\"\\`$\\\\]\)/\\\1/g'
-
-# Same as above, but do not quote variable references.
-double_quote_subst='s/\([\\"\\`\\\\]\)/\\\1/g'
-
-# The name of this program.
-progname=`$echo "X$0" | $Xsed -e 's%^.*/%%'`
-
-# Constants:
-PROGRAM=ltconfig
-PACKAGE=libtool
-VERSION=1.2
-ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.c 1>&5'
-ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.c $LIBS 1>&5'
-rm="rm -f"
-
-help="Try \`$progname --help' for more information."
-
-# Global variables:
-can_build_shared=yes
-enable_shared=yes
-# All known linkers require a `.a' archive for static linking.
-enable_static=yes
-ltmain=
-silent=
-srcdir=
-ac_config_guess=
-ac_config_sub=
-host=
-nonopt=
-verify_host=yes
-with_gcc=no
-with_gnu_ld=no
-
-old_AR="$AR"
-old_CC="$CC"
-old_CFLAGS="$CFLAGS"
-old_CPPFLAGS="$CPPFLAGS"
-old_LD="$LD"
-old_LN_S="$LN_S"
-old_NM="$NM"
-old_RANLIB="$RANLIB"
-
-# Parse the command line options.
-args=
-prev=
-for option
-do
- case "$option" in
- -*=*) optarg=`echo "$option" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
- *) optarg= ;;
- esac
-
- # If the previous option needs an argument, assign it.
- if test -n "$prev"; then
- eval "$prev=\$option"
- prev=
- continue
- fi
-
- case "$option" in
- --help) cat <<EOM
-Usage: $progname [OPTION]... LTMAIN [HOST]
-
-Generate a system-specific libtool script.
-
- --disable-shared do not build shared libraries
- --disable-static do not build static libraries
- --help display this help and exit
- --no-verify do not verify that HOST is a valid host type
- --quiet same as \`--silent'
- --silent do not print informational messages
- --srcdir=DIR find \`config.guess' in DIR
- --version output version information and exit
- --with-gcc assume that the GNU C compiler will be used
- --with-gnu-ld assume that the C compiler uses the GNU linker
-
-LTMAIN is the \`ltmain.sh' shell script fragment that provides basic libtool
-functionality.
-
-HOST is the canonical host system name [default=guessed].
-EOM
- exit 0
- ;;
-
- --disable-shared) enable_shared=no ;;
-
- --disable-static) enable_static=no ;;
-
- --quiet | --silent) silent=yes ;;
-
- --srcdir) prev=srcdir ;;
- --srcdir=*) srcdir="$optarg" ;;
-
- --no-verify) verify_host=no ;;
-
- --version) echo "$PROGRAM (GNU $PACKAGE) $VERSION"; exit 0 ;;
-
- --with-gcc) with_gcc=yes ;;
- --with-gnu-ld) with_gnu_ld=yes ;;
-
- -*)
- echo "$progname: unrecognized option \`$option'" 1>&2
- echo "$help" 1>&2
- exit 1
- ;;
-
- *)
- if test -z "$ltmain"; then
- ltmain="$option"
- elif test -z "$host"; then
-# This generates an unnecessary warning for sparc-sun-solaris4.1.3_U1
-# if test -n "`echo $option| sed 's/[-a-z0-9.]//g'`"; then
-# echo "$progname: warning \`$option' is not a valid host type" 1>&2
-# fi
- host="$option"
- else
- echo "$progname: too many arguments" 1>&2
- echo "$help" 1>&2
- exit 1
- fi ;;
- esac
-done
-
-if test -z "$ltmain"; then
- echo "$progname: you must specify a LTMAIN file" 1>&2
- echo "$help" 1>&2
- exit 1
-fi
-
-if test -f "$ltmain"; then :
-else
- echo "$progname: \`$ltmain' does not exist" 1>&2
- echo "$help" 1>&2
- exit 1
-fi
-
-# Quote any args containing shell metacharacters.
-ltconfig_args=
-for arg
-do
- case "$arg" in
- *" "*|*" "*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?]*)
- ltconfig_args="$ltconfig_args '$arg'" ;;
- *) ltconfig_args="$ltconfig_args $arg" ;;
- esac
-done
-
-# A relevant subset of AC_INIT.
-
-# File descriptor usage:
-# 0 standard input
-# 1 file creation
-# 2 errors and warnings
-# 3 some systems may open it to /dev/tty
-# 4 used on the Kubota Titan
-# 5 compiler messages saved in config.log
-# 6 checking for... messages and results
-if test "$silent" = yes; then
- exec 6>/dev/null
-else
- exec 6>&1
-fi
-exec 5>>./config.log
-
-# NLS nuisances.
-# Only set LANG and LC_ALL to C if already set.
-# These must not be set unconditionally because not all systems understand
-# e.g. LANG=C (notably SCO).
-if test "${LC_ALL+set}" = set; then LC_ALL=C; export LC_ALL; fi
-if test "${LANG+set}" = set; then LANG=C; export LANG; fi
-
-if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
- # Stardent Vistra SVR4 grep lacks -e, says ghazi@caip.rutgers.edu.
- if (echo -n testing; echo 1,2,3) | sed s/-n/xn/ | grep xn >/dev/null; then
- ac_n= ac_c='
-' ac_t=' '
- else
- ac_n=-n ac_c= ac_t=
- fi
-else
- ac_n= ac_c='\c' ac_t=
-fi
-
-if test -z "$srcdir"; then
- # Assume the source directory is the same one as the path to ltmain.sh.
- srcdir=`$echo "$ltmain" | $Xsed -e 's%/[^/]*$%%'`
- test "$srcdir" = "$ltmain" && srcdir=.
-fi
-
-trap "$rm conftest*; exit 1" 1 2 15
-if test "$verify_host" = yes; then
- # Check for config.guess and config.sub.
- ac_aux_dir=
- for ac_dir in $srcdir $srcdir/.. $srcdir/../..; do
- if test -f $ac_dir/config.guess; then
- ac_aux_dir=$ac_dir
- break
- fi
- done
- if test -z "$ac_aux_dir"; then
- echo "$progname: cannot find config.guess in $srcdir $srcdir/.. $srcdir/../.." 1>&2
- echo "$help" 1>&2
- exit 1
- fi
- ac_config_guess=$ac_aux_dir/config.guess
- ac_config_sub=$ac_aux_dir/config.sub
-
- # Make sure we can run config.sub.
- if $ac_config_sub sun4 >/dev/null 2>&1; then :
- else
- echo "$progname: cannot run $ac_config_sub" 1>&2
- echo "$help" 1>&2
- exit 1
- fi
-
- echo $ac_n "checking host system type""... $ac_c" 1>&6
-
- host_alias=$host
- case "$host_alias" in
- "")
- if host_alias=`$ac_config_guess`; then :
- else
- echo "$progname: cannot guess host type; you must specify one" 1>&2
- echo "$help" 1>&2
- exit 1
- fi ;;
- esac
- host=`$ac_config_sub $host_alias`
- echo "$ac_t$host" 1>&6
-
- # Make sure the host verified.
- test -z "$host" && exit 1
-
-elif test -z "$host"; then
- echo "$progname: you must specify a host type if you use \`--no-verify'" 1>&2
- echo "$help" 1>&2
- exit 1
-else
- host_alias=$host
-fi
-
-# Transform linux* to *-*-linux-gnu*, to support old configure scripts.
-case "$host_os" in
-linux-gnu*) ;;
-linux*) host=`echo $host | sed 's/^\(.*-.*-linux\)\(.*\)$/\1-gnu\2/'`
-esac
-
-host_cpu=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\1/'`
-host_vendor=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\2/'`
-host_os=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'`
-
-case "$host_os" in
-aix3*)
- # AIX sometimes has problems with the GCC collect2 program. For some
- # reason, if we set the COLLECT_NAMES environment variable, the problems
- # vanish in a puff of smoke.
- if test "${COLLECT_NAMES+set}" != set; then
- COLLECT_NAMES=
- export COLLECT_NAMES
- fi
- ;;
-esac
-
-# Determine commands to create old-style static archives.
-old_archive_cmds='$AR cru $oldlib$oldobjs'
-old_postinstall_cmds='chmod 644 $oldlib'
-old_postuninstall_cmds=
-
-# Set a sane default for `AR'.
-test -z "$AR" && AR=ar
-
-# If RANLIB is not set, then run the test.
-if test "${RANLIB+set}" != "set"; then
- result=no
-
- echo $ac_n "checking for ranlib... $ac_c" 1>&6
- IFS="${IFS= }"; save_ifs="$IFS"; IFS="${IFS}:"
- for dir in $PATH; do
- test -z "$dir" && dir=.
- if test -f $dir/ranlib; then
- RANLIB="ranlib"
- result="ranlib"
- break
- fi
- done
- IFS="$save_ifs"
-
- echo "$ac_t$result" 1>&6
-fi
-
-if test -n "$RANLIB"; then
- old_archive_cmds="$old_archive_cmds;\$RANLIB \$oldlib"
- old_postinstall_cmds="\$RANLIB \$oldlib;$old_postinstall_cmds"
-fi
-
-# Check to see if we are using GCC.
-if test "$with_gcc" != yes || test -z "$CC"; then
- # If CC is not set, then try to find GCC or a usable CC.
- if test -z "$CC"; then
- echo $ac_n "checking for gcc... $ac_c" 1>&6
- IFS="${IFS= }"; save_ifs="$IFS"; IFS="${IFS}:"
- for dir in $PATH; do
- IFS="$save_ifs"
- test -z "$dir" && dir=.
- if test -f $dir/gcc; then
- CC="gcc"
- break
- fi
- done
- IFS="$save_ifs"
-
- if test -n "$CC"; then
- echo "$ac_t$CC" 1>&6
- else
- echo "$ac_t"no 1>&6
- fi
- fi
-
- # Not "gcc", so try "cc", rejecting "/usr/ucb/cc".
- if test -z "$CC"; then
- echo $ac_n "checking for cc... $ac_c" 1>&6
- IFS="${IFS= }"; save_ifs="$IFS"; IFS="${IFS}:"
- cc_rejected=no
- for dir in $PATH; do
- test -z "$dir" && dir=.
- if test -f $dir/cc; then
- if test "$dir/cc" = "/usr/ucb/cc"; then
- cc_rejected=yes
- continue
- fi
- CC="cc"
- break
- fi
- done
- IFS="$save_ifs"
- if test $cc_rejected = yes; then
- # We found a bogon in the path, so make sure we never use it.
- set dummy $CC
- shift
- if test $# -gt 0; then
- # We chose a different compiler from the bogus one.
- # However, it has the same name, so the bogon will be chosen
- # first if we set CC to just the name; use the full file name.
- shift
- set dummy "$dir/cc" "$@"
- shift
- CC="$@"
- fi
- fi
-
- if test -n "$CC"; then
- echo "$ac_t$CC" 1>&6
- else
- echo "$ac_t"no 1>&6
- fi
-
- if test -z "$CC"; then
- echo "$progname: error: no acceptable cc found in \$PATH" 1>&2
- exit 1
- fi
- fi
-
- # Now see if the compiler is really GCC.
- with_gcc=no
- echo $ac_n "checking whether we are using GNU C... $ac_c" 1>&6
- echo "$progname:424: checking whether we are using GNU C" >&5
-
- $rm conftest.c
- cat > conftest.c <<EOF
-#ifdef __GNUC__
- yes;
-#endif
-EOF
- if { ac_try='${CC-cc} -E conftest.c'; { (eval echo $progname:432: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
- with_gcc=yes
- fi
- $rm conftest.c
- echo "$ac_t$with_gcc" 1>&6
-fi
-
-# Allow CC to be a program name with arguments.
-set dummy $CC
-compiler="$2"
-
-echo $ac_n "checking for $compiler option to produce PIC... $ac_c" 1>&6
-pic_flag=
-special_shlib_compile_flags=
-wl=
-link_static_flag=
-no_builtin_flag=
-
-if test "$with_gcc" = yes; then
- wl='-Wl,'
- link_static_flag='-static'
- no_builtin_flag=' -fno-builtin'
-
- case "$host_os" in
- aix3* | aix4* | irix5* | irix6* | osf3* | osf4*)
- # PIC is the default for these OSes.
- ;;
- os2*)
- # We can build DLLs from non-PIC.
- ;;
- amigaos*)
- # FIXME: we need at least 68020 code to build shared libraries, but
- # adding the `-m68020' flag to GCC prevents building anything better,
- # like `-m68040'.
- pic_flag='-m68020 -resident32 -malways-restore-a4'
- ;;
- *)
- pic_flag='-fPIC'
- ;;
- esac
-else
- # PORTME Check for PIC flags for the system compiler.
- case "$host_os" in
- aix3* | aix4*)
- # All AIX code is PIC.
- link_static_flag='-bnso -bI:/lib/syscalls.exp'
- ;;
-
- hpux9* | hpux10*)
- # Is there a better link_static_flag that works with the bundled CC?
- wl='-Wl,'
- link_static_flag="${wl}-a ${wl}archive"
- pic_flag='+Z'
- ;;
-
- irix5* | irix6*)
- wl='-Wl,'
- link_static_flag='-non_shared'
- # PIC (with -KPIC) is the default.
- ;;
-
- os2*)
- # We can build DLLs from non-PIC.
- ;;
-
- osf3* | osf4*)
- # All OSF/1 code is PIC.
- wl='-Wl,'
- link_static_flag='-non_shared'
- ;;
-
- sco3.2v5*)
- pic_flag='-Kpic'
- link_static_flag='-dn'
- special_shlib_compile_flags='-belf'
- ;;
-
- solaris2*)
- pic_flag='-KPIC'
- link_static_flag='-Bstatic'
- wl='-Wl,'
- ;;
-
- sunos4*)
- pic_flag='-PIC'
- link_static_flag='-Bstatic'
- wl='-Qoption ld '
- ;;
-
- sysv4.2uw2*)
- pic_flag='-KPIC'
- link_static_flag='-Bstatic'
- wl='-Wl,'
- ;;
-
- uts4*)
- pic_flag='-pic'
- link_static_flag='-Bstatic'
- ;;
-
- *)
- can_build_shared=no
- ;;
- esac
-fi
-
-if test -n "$pic_flag"; then
- echo "$ac_t$pic_flag" 1>&6
-
- # Check to make sure the pic_flag actually works.
- echo $ac_n "checking if $compiler PIC flag $pic_flag works... $ac_c" 1>&6
- $rm conftest*
- echo > conftest.c
- save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS $pic_flag -DPIC"
- echo "$progname:547: checking if $compiler PIC flag $pic_flag works" >&5
- if { (eval echo $progname:548: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>conftest.err; } && test -s conftest.o; then
- # Append any warnings to the config.log.
- cat conftest.err 1>&5
-
- # On HP-UX, both CC and GCC only warn that PIC is supported... then they
- # create non-PIC objects. So, if there were any warnings, we assume that
- # PIC is not supported.
- if test -s conftest.err; then
- echo "$ac_t"no 1>&6
- can_build_shared=no
- pic_flag=
- else
- echo "$ac_t"yes 1>&6
- pic_flag=" $pic_flag"
- fi
- else
- # Append any errors to the config.log.
- cat conftest.err 1>&5
- can_build_shared=no
- pic_flag=
- echo "$ac_t"no 1>&6
- fi
- CFLAGS="$save_CFLAGS"
- $rm conftest*
-else
- echo "$ac_t"none 1>&6
-fi
-
-# Check for any special shared library compilation flags.
-if test -n "$special_shlib_compile_flags"; then
- echo "$progname: warning: \`$CC' requires \`$special_shlib_compile_flags' to build shared libraries" 1>&2
- if echo "$old_CC $old_CFLAGS " | egrep -e "[ ]$special_shlib_compile_flags[ ]" >/dev/null; then :
- else
- echo "$progname: add \`$special_shlib_compile_flags' to the CC or CFLAGS env variable and reconfigure" 1>&2
- can_build_shared=no
- fi
-fi
-
-echo $ac_n "checking if $compiler static flag $link_static_flag works... $ac_c" 1>&6
-$rm conftest*
-echo 'main(){return(0);}' > conftest.c
-save_LDFLAGS="$LDFLAGS"
-LDFLAGS="$LDFLAGS $link_static_flag"
-echo "$progname:591: checking if $compiler static flag $link_static_flag works" >&5
-if { (eval echo $progname:592: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
- echo "$ac_t$link_static_flag" 1>&6
-else
- echo "$ac_t"none 1>&6
- link_static_flag=
-fi
-LDFLAGS="$save_LDFLAGS"
-$rm conftest*
-
-if test -z "$LN_S"; then
- # Check to see if we can use ln -s, or we need hard links.
- echo $ac_n "checking whether ln -s works... $ac_c" 1>&6
- $rm conftestdata
- if ln -s X conftestdata 2>/dev/null; then
- $rm conftestdata
- LN_S="ln -s"
- else
- LN_S=ln
- fi
- if test "$LN_S" = "ln -s"; then
- echo "$ac_t"yes 1>&6
- else
- echo "$ac_t"no 1>&6
- fi
-fi
-
-# Make sure LD is an absolute path.
-if test -z "$LD"; then
- ac_prog=ld
- if test "$with_gcc" = yes; then
- # Check if gcc -print-prog-name=ld gives a path.
- echo $ac_n "checking for ld used by GCC... $ac_c" 1>&6
- echo "$progname:624: checking for ld used by GCC" >&5
- ac_prog=`($CC -print-prog-name=ld) 2>&5`
- case "$ac_prog" in
- # Accept absolute paths.
- /* | [A-Za-z]:\\*)
- test -z "$LD" && LD="$ac_prog"
- ;;
- "")
- # If it fails, then pretend we are not using GCC.
- ac_prog=ld
- ;;
- *)
- # If it is relative, then search for the first ld in PATH.
- with_gnu_ld=unknown
- ;;
- esac
- elif test "$with_gnu_ld" = yes; then
- echo $ac_n "checking for GNU ld... $ac_c" 1>&6
- echo "$progname:642: checking for GNU ld" >&5
- else
- echo $ac_n "checking for non-GNU ld""... $ac_c" 1>&6
- echo "$progname:645: checking for non-GNU ld" >&5
- fi
-
- if test -z "$LD"; then
- IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
- for ac_dir in $PATH; do
- test -z "$ac_dir" && ac_dir=.
- if test -f "$ac_dir/$ac_prog"; then
- LD="$ac_dir/$ac_prog"
- # Check to see if the program is GNU ld. I'd rather use --version,
- # but apparently some GNU ld's only accept -v.
- # Break only if it was the GNU/non-GNU ld that we prefer.
- if "$LD" -v 2>&1 < /dev/null | egrep '(GNU|with BFD)' > /dev/null; then
- test "$with_gnu_ld" != no && break
- else
- test "$with_gnu_ld" != yes && break
- fi
- fi
- done
- IFS="$ac_save_ifs"
- fi
-
- if test -n "$LD"; then
- echo "$ac_t$LD" 1>&6
- else
- echo "$ac_t"no 1>&6
- fi
-
- if test -z "$LD"; then
- echo "$progname: error: no acceptable ld found in \$PATH" 1>&2
- exit 1
- fi
-fi
-
-# Check to see if it really is or is not GNU ld.
-echo $ac_n "checking if the linker ($LD) is GNU ld... $ac_c" 1>&6
-# I'd rather use --version here, but apparently some GNU ld's only accept -v.
-if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
- with_gnu_ld=yes
-else
- with_gnu_ld=no
-fi
-echo "$ac_t$with_gnu_ld" 1>&6
-
-# See if the linker supports building shared libraries.
-echo $ac_n "checking whether the linker ($LD) supports shared libraries... $ac_c" 1>&6
-
-allow_undefined_flag=
-no_undefined_flag=
-archive_cmds=
-old_archive_from_new_cmds=
-export_dynamic_flag_spec=
-hardcode_libdir_flag_spec=
-hardcode_libdir_separator=
-hardcode_direct=no
-hardcode_minus_L=no
-hardcode_shlibpath_var=unsupported
-runpath_var=
-
-case "$host_os" in
-amigaos* | sunos4*)
- # On these operating systems, we should treat GNU ld like the system ld.
- gnu_ld_acts_native=yes
- ;;
-*)
- gnu_ld_acts_native=no
- ;;
-esac
-
-ld_shlibs=yes
-if test "$with_gnu_ld" = yes && test "$gnu_ld_acts_native" != yes; then
-
- # See if GNU ld supports shared libraries.
- if $LD --help 2>&1 | egrep ': supported targets:.* elf' > /dev/null; then
- archive_cmds='$CC -shared ${wl}-soname $wl$soname -o $lib$libobjs'
- runpath_var=LD_RUN_PATH
- ld_shlibs=yes
- else
- ld_shlibs=no
- fi
-
- if test "$ld_shlibs" = yes; then
- hardcode_libdir_flag_spec='${wl}--rpath ${wl}$libdir'
- export_dynamic_flag_spec='${wl}--export-dynamic'
- fi
-else
- # PORTME fill in a description of your system's linker (not GNU ld)
- case "$host_os" in
- aix3*)
- allow_undefined_flag=unsupported
- archive_cmds='$NM$libobjs | $global_symbol_pipe | sed '\''s/.* //'\'' > $lib.exp;$LD -o $objdir/$soname$libobjs -bE:$lib.exp -T512 -H512 -bM:SRE;$AR cru $lib $objdir/$soname'
- # Note: this linker hardcodes the directories in LIBPATH if there
- # are no directories specified by -L.
- hardcode_minus_L=yes
- if test "$with_gcc" = yes && test -z "$link_static_flag"; then
- # Neither direct hardcoding nor static linking is supported with a
- # broken collect2.
- hardcode_direct=unsupported
- fi
- ;;
-
- aix4*)
- allow_undefined_flag=unsupported
- archive_cmds='$NM$libobjs | $global_symbol_pipe | sed '\''s/.* //'\'' > $lib.exp;$CC -o $objdir/$soname$libobjs ${wl}-bE:$lib.exp ${wl}-bM:SRE ${wl}-bnoentry;$AR cru $lib $objdir/$soname'
- hardcode_direct=yes
- hardcode_minus_L=yes
- ;;
-
- amigaos*)
- archive_cmds='$rm $objdir/a2ixlibrary.data;$echo "#define NAME $libname" > $objdir/a2ixlibrary.data;$echo "#define LIBRARY_ID 1" >> $objdir/a2ixlibrary.data;$echo "#define VERSION $major" >> $objdir/a2ixlibrary.data;$echo "#define REVISION $revision" >> $objdir/a2ixlibrary.data;$AR cru $lib$libobjs;$RANLIB $lib;(cd $objdir && a2ixlibrary -32)'
- hardcode_libdir_flag_spec='-L$libdir'
- hardcode_minus_L=yes
- ;;
-
- # FreeBSD 2.2.[012] allows us to include c++rt0.o to get C++ constructor
- # support. Future versions do this automatically, but an explicit c++rt0.o
- # does not break anything, and helps significantly (at the cost of a little
- # extra space).
- freebsd2.2*)
- archive_cmds='$LD -Bshareable -o $lib$libobjs /usr/lib/c++rt0.o'
- hardcode_libdir_flag_spec='-R$libdir'
- hardcode_direct=yes
- hardcode_minus_L=yes
- hardcode_shlibpath_var=no
- ;;
-
- # Unfortunately, older versions of FreeBSD 2 do not have this feature.
- freebsd2*)
- archive_cmds='$LD -Bshareable -o $lib$libobjs'
- hardcode_direct=yes
- hardcode_minus_L=yes
- hardcode_shlibpath_var=no
- ;;
-
- # FreeBSD 3, at last, uses gcc -shared to do shared libraries.
- freebsd3*)
- archive_cmds='$CC -shared -o $lib$libobjs'
- hardcode_libdir_flag_spec='-R$libdir'
- hardcode_direct=yes
- hardcode_minus_L=yes
- hardcode_shlibpath_var=no
- ;;
-
- hpux9*)
- archive_cmds='$rm $objdir/$soname;$LD -b +s +b $install_libdir -o $objdir/$soname$libobjs;mv $objdir/$soname $lib'
- hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
- hardcode_direct=yes
- hardcode_minus_L=yes
- export_dynamic_flag_spec='${wl}-E'
- ;;
-
- hpux10*)
- archive_cmds='$LD -b +h $soname +s +b $install_libdir -o $lib$libobjs'
- hardcode_libdir_flag_spec='${wl}+b ${wl}$libdir'
- hardcode_direct=yes
- hardcode_minus_L=yes
- export_dynamic_flag_spec='${wl}-E'
- ;;
-
- irix5* | irix6*)
- archive_cmds='$LD -shared -o $lib -soname $soname -set_version $verstring$libobjs'
- hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
- ;;
-
- netbsd*)
- # Tested with NetBSD 1.2 ld
- archive_cmds='$LD -Bshareable -o $lib$libobjs'
- hardcode_libdir_flag_spec='-R$libdir'
- hardcode_direct=yes
- hardcode_shlibpath_var=no
- ;;
-
- openbsd*)
- archive_cmds='$LD -Bshareable -o $lib$libobjs'
- hardcode_libdir_flag_spec='-R$libdir'
- hardcode_direct=yes
- hardcode_shlibpath_var=no
- ;;
-
- os2*)
- hardcode_libdir_flag_spec='-L$libdir'
- hardcode_minus_L=yes
- allow_undefined_flag=unsupported
- archive_cmds='$echo "LIBRARY $libname INITINSTANCE" > $objdir/$libname.def;$echo "DESCRIPTION \"$libname\"" >> $objdir/$libname.def;$echo DATA >> $objdir/$libname.def;$echo " SINGLE NONSHARED" >> $objdir/$libname.def;$echo EXPORTS >> $objdir/$libname.def;emxexp$libobjs >> $objdir/$libname.def;$CC -Zdll -Zcrtdll -o $lib$libobjs $objdir/$libname.def'
- old_archive_from_new_cmds='emximp -o $objdir/$libname.a $objdir/$libname.def'
- ;;
-
- osf3* | osf4*)
- allow_undefined_flag=' -expect_unresolved \*'
- archive_cmds='$LD -shared${allow_undefined_flag} -o $lib -soname $soname -set_version $verstring$libobjs$deplibs'
- hardcode_libdir_flag_spec='${wl}-rpath ${wl}$libdir'
- hardcode_libdir_separator=:
- ;;
-
- sco3.2v5*)
- archive_cmds='$LD -G -o $lib$libobjs'
- hardcode_direct=yes
- ;;
-
- solaris2*)
- no_undefined_flag=' -z text'
- archive_cmds='$LD -G${allow_undefined_flag} -h $soname -o $lib$libobjs'
- hardcode_libdir_flag_spec='-R$libdir'
- hardcode_shlibpath_var=no
-
- # Solaris 2 before 2.5 hardcodes -L paths.
- case "$host_os" in
- solaris2.[0-4]*)
- hardcode_minus_L=yes
- ;;
- esac
- ;;
-
- sunos4*)
- if test "$with_gcc" = yes; then
- archive_cmds='$CC -shared -o $lib$libobjs'
- else
- archive_cmds='$LD -assert pure-text -Bstatic -o $lib$libobjs'
- fi
-
- if test "$with_gnu_ld" = yes; then
- export_dynamic_flag_spec='${wl}-export-dynamic'
- fi
- hardcode_libdir_flag_spec='-L$libdir'
- hardcode_direct=yes
- hardcode_minus_L=yes
- hardcode_shlibpath_var=no
- ;;
-
- uts4*)
- archive_cmds='$LD -G -h $soname -o $lib$libobjs'
- hardcode_libdir_flag_spec='-L$libdir'
- hardcode_direct=no
- hardcode_minus_L=no
- hardcode_shlibpath_var=no
- ;;
-
- *)
- ld_shlibs=no
- can_build_shared=no
- ;;
- esac
-fi
-echo "$ac_t$ld_shlibs" 1>&6
-
-if test -z "$NM"; then
- echo $ac_n "checking for BSD-compatible nm... $ac_c" 1>&6
- case "$NM" in
- /* | [A-Za-z]:\\*) ;; # Let the user override the test with a path.
- *)
- IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
- for ac_dir in /usr/ucb /usr/ccs/bin $PATH /bin; do
- test -z "$ac_dir" && ac_dir=.
- if test -f $ac_dir/nm; then
- # Check to see if the nm accepts a BSD-compat flag.
- # Adding the `sed 1q' prevents false positives on HP-UX, which says:
- # nm: unknown option "B" ignored
- if ($ac_dir/nm -B /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
- NM="$ac_dir/nm -B"
- elif ($ac_dir/nm -p /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
- NM="$ac_dir/nm -p"
- else
- NM="$ac_dir/nm"
- fi
- break
- fi
- done
- IFS="$ac_save_ifs"
- test -z "$NM" && NM=nm
- ;;
- esac
- echo "$ac_t$NM" 1>&6
-fi
-
-# Check for command to grab the raw symbol name followed by C symbol from nm.
-echo $ac_n "checking command to parse $NM output... $ac_c" 1>&6
-
-# These are sane defaults that work on at least a few old systems.
-# [They come from Ultrix. What could be older than Ultrix?!! ;)]
-
-# Character class describing NM global symbol codes.
-symcode='[BCDEGRSTU]'
-
-# Regexp to match symbols that can be accessed directly from C.
-sympat='\([_A-Za-z][_A-Za-z0-9]*\)'
-
-# Transform the above into a raw symbol and a C symbol.
-symxfrm='\1 \1'
-
-# Define system-specific variables.
-case "$host_os" in
-aix*)
- symcode='[BCDTU]'
- ;;
-irix*)
- # Cannot use undefined symbols on IRIX because inlined functions mess us up.
- symcode='[BCDEGRST]'
- ;;
-solaris2*)
- symcode='[BDTU]'
- ;;
-esac
-
-# If we're using GNU nm, then use its standard symbol codes.
-if $NM -V 2>&1 | egrep '(GNU|with BFD)' > /dev/null; then
- symcode='[ABCDGISTUW]'
-fi
-
-# Write the raw and C identifiers.
-global_symbol_pipe="sed -n -e 's/^.* $symcode $sympat$/$symxfrm/p'"
-
-# Check to see that the pipe works correctly.
-pipe_works=no
-$rm conftest*
-cat > conftest.c <<EOF
-#ifdef __cplusplus
-extern "C" {
-#endif
-char nm_test_var;
-void nm_test_func(){}
-#ifdef __cplusplus
-}
-#endif
-main(){nm_test_var='a';nm_test_func();return(0);}
-EOF
-
-echo "$progname:971: checking if global_symbol_pipe works" >&5
-if { (eval echo $progname:972: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; } && test -s conftest.o; then
- # Now try to grab the symbols.
- nlist=conftest.nm
- if { echo "$progname:975: eval \"$NM conftest.o | $global_symbol_pipe > $nlist\"" >&5; eval "$NM conftest.o | $global_symbol_pipe > $nlist 2>&5"; } && test -s "$nlist"; then
-
- # Try sorting and uniquifying the output.
- if sort "$nlist" | uniq > "$nlist"T; then
- mv -f "$nlist"T "$nlist"
- wcout=`wc "$nlist" 2>/dev/null`
- count=`$echo "X$wcout" | $Xsed -e 's/^[ ]*\([0-9][0-9]*\).*$/\1/'`
- (test "$count" -ge 0) 2>/dev/null || count=-1
- else
- rm -f "$nlist"T
- count=-1
- fi
-
- # Make sure that we snagged all the symbols we need.
- if egrep ' nm_test_var$' "$nlist" >/dev/null; then
- if egrep ' nm_test_func$' "$nlist" >/dev/null; then
- cat <<EOF > conftest.c
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-EOF
- # Now generate the symbol file.
- sed 's/^.* \(.*\)$/extern char \1;/' < "$nlist" >> conftest.c
-
- cat <<EOF >> conftest.c
-#if defined (__STDC__) && __STDC__
-# define __ptr_t void *
-#else
-# define __ptr_t char *
-#endif
-
-/* The number of symbols in dld_preloaded_symbols, -1 if unsorted. */
-int dld_preloaded_symbol_count = $count;
-
-/* The mapping between symbol names and symbols. */
-struct {
- char *name;
- __ptr_t address;
-}
-dld_preloaded_symbols[] =
-{
-EOF
- sed 's/^\(.*\) \(.*\)$/ {"\1", (__ptr_t) \&\2},/' < "$nlist" >> conftest.c
- cat <<\EOF >> conftest.c
- {0, (__ptr_t) 0}
-};
-
-#ifdef __cplusplus
-}
-#endif
-EOF
- # Now try linking the two files.
- mv conftest.o conftestm.o
- save_LIBS="$LIBS"
- save_CFLAGS="$CFLAGS"
- LIBS='conftestm.o'
- CFLAGS="$CFLAGS$no_builtin_flag"
- if { (eval echo $progname:1033: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
- pipe_works=yes
- else
- echo "$progname: failed program was:" >&5
- cat conftest.c >&5
- fi
- LIBS="$save_LIBS"
- else
- echo "cannot find nm_test_func in $nlist" >&5
- fi
- else
- echo "cannot find nm_test_var in $nlist" >&5
- fi
- else
- echo "cannot run $global_symbol_pipe" >&5
- fi
-else
- echo "$progname: failed program was:" >&5
- cat conftest.c >&5
-fi
-$rm conftest*
-
-# Do not use the global_symbol_pipe unless it works.
-echo "$ac_t$pipe_works" 1>&6
-test "$pipe_works" = yes || global_symbol_pipe=
-
-# Check hardcoding attributes.
-echo $ac_n "checking how to hardcode library paths into programs... $ac_c" 1>&6
-hardcode_action=
-if test -n "$hardcode_libdir_flag_spec" || \
- test -n "$runpath_var"; then
-
- # We can hardcode non-existant directories.
- if test "$hardcode_direct" != no && \
- test "$hardcode_minus_L" != no && \
- test "$hardcode_shlibpath_var" != no; then
-
- # Linking always hardcodes the temporary library directory.
- hardcode_action=relink
- else
- # We can link without hardcoding, and we can hardcode nonexisting dirs.
- hardcode_action=immediate
- fi
-elif test "$hardcode_direct" != yes && \
- test "$hardcode_minus_L" != yes && \
- test "$hardcode_shlibpath_var" != yes; then
- # We cannot hardcode anything.
- hardcode_action=unsupported
-else
- # We can only hardcode existing directories.
- hardcode_action=relink
-fi
-echo "$ac_t$hardcode_action" 1>&6
-test "$hardcode_action" = unsupported && can_build_shared=no
-
-
-reload_flag=
-reload_cmds='$LD$reload_flag -o $output$reload_objs'
-echo $ac_n "checking for $LD option to reload object files... $ac_c" 1>&6
-# PORTME Some linker may need a different reload flag.
-reload_flag='-r'
-echo "$ac_t$reload_flag"
-test -n "$reload_flag" && reload_flag=" $reload_flag"
-
-# PORTME Fill in your ld.so characteristics
-library_names_spec=
-libname_spec='lib$name'
-soname_spec=
-postinstall_cmds=
-postuninstall_cmds=
-finish_cmds=
-finish_eval=
-shlibpath_var=
-version_type=none
-dynamic_linker="$host_os ld.so"
-
-echo $ac_n "checking dynamic linker characteristics... $ac_c" 1>&6
-case "$host_os" in
-aix3* | aix4*)
- version_type=linux
- library_names_spec='${libname}${release}.so.$versuffix $libname.a'
- shlibpath_var=LIBPATH
-
- # AIX has no versioning support, so we append a major version to the name.
- soname_spec='${libname}${release}.so.$major'
- ;;
-
-amigaos*)
- library_names_spec='$libname.ixlibrary $libname.a'
- # Create ${libname}_ixlibrary.a entries in /sys/libs.
- finish_eval='for lib in `ls $libdir/*.ixlibrary 2>/dev/null`; do libname=`$echo "X$lib" | $Xsed -e '\''s%^.*/\([^/]*\)\.ixlibrary$%\1%'\''`; test $rm /sys/libs/${libname}_ixlibrary.a; $show "(cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a)"; (cd /sys/libs && $LN_S $lib ${libname}_ixlibrary.a) || exit 1; done'
- ;;
-
-freebsd2* | freebsd3*)
- version_type=sunos
- library_names_spec='${libname}${release}.so.$versuffix $libname.so'
- finish_cmds='PATH="$PATH:/sbin" ldconfig -m $libdir'
- shlibpath_var=LD_LIBRARY_PATH
- ;;
-
-gnu*)
- version_type=sunos
- library_names_spec='${libname}${release}.so.$versuffix'
- shlibpath_var=LD_LIBRARY_PATH
- ;;
-
-hpux9* | hpux10*)
- # Give a soname corresponding to the major version so that dld.sl refuses to
- # link against other versions.
- dynamic_linker="$host_os dld.sl"
- version_type=sunos
- shlibpath_var=SHLIB_PATH
- library_names_spec='${libname}${release}.sl.$versuffix ${libname}${release}.sl.$major $libname.sl'
- soname_spec='${libname}${release}.sl.$major'
- # HP-UX runs *really* slowly unless shared libraries are mode 555.
- postinstall_cmds='chmod 555 $lib'
- ;;
-
-irix5* | irix6*)
- version_type=osf
- soname_spec='${libname}${release}.so'
- library_names_spec='${libname}${release}.so.$versuffix $libname.so'
- shlibpath_var=LD_LIBRARY_PATH
- ;;
-
-# No shared lib support for Linux oldld, aout, or coff.
-linux-gnuoldld* | linux-gnuaout* | linux-gnucoff*)
- dynamic_linker=no
- ;;
-
-# This must be Linux ELF.
-linux-gnu*)
- version_type=linux
- library_names_spec='${libname}${release}.so.$versuffix ${libname}${release}.so.$major $libname.so'
- soname_spec='${libname}${release}.so.$major'
- finish_cmds='PATH="$PATH:/sbin" ldconfig -n $libdir'
- shlibpath_var=LD_LIBRARY_PATH
-
- if test -f /lib/ld.so.1; then
- dynamic_linker='GNU ld.so'
- else
- # Only the GNU ld.so supports shared libraries on MkLinux.
- case "$host_cpu" in
- powerpc*) dynamic_linker=no ;;
- *) dynamic_linker='Linux ld.so' ;;
- esac
- fi
- ;;
-
-netbsd* | openbsd*)
- version_type=sunos
- library_names_spec='${libname}${release}.so.$versuffix'
- finish_cmds='PATH="$PATH:/sbin" ldconfig -m $libdir'
- shlibpath_var=LD_LIBRARY_PATH
- ;;
-
-os2*)
- libname_spec='$name'
- library_names_spec='$libname.dll $libname.a'
- dynamic_linker='OS/2 ld.exe'
- shlibpath_var=LIBPATH
- ;;
-
-osf3* | osf4*)
- version_type=osf
- soname_spec='${libname}${release}.so'
- library_names_spec='${libname}${release}.so.$versuffix $libname.so'
- shlibpath_var=LD_LIBRARY_PATH
- ;;
-
-sco3.2v5*)
- version_type=osf
- soname_spec='${libname}${release}.so.$major'
- library_names_spec='${libname}${release}.so.$versuffix ${libname}${release}.so.$major $libname.so'
- shlibpath_var=LD_LIBRARY_PATH
- ;;
-
-solaris2*)
- version_type=linux
- library_names_spec='${libname}${release}.so.$versuffix ${libname}${release}.so.$major $libname.so'
- soname_spec='${libname}${release}.so.$major'
- shlibpath_var=LD_LIBRARY_PATH
- ;;
-
-sunos4*)
- version_type=sunos
- library_names_spec='${libname}${release}.so.$versuffix'
- finish_cmds='PATH="$PATH:/usr/etc" ldconfig $libdir'
- shlibpath_var=LD_LIBRARY_PATH
- ;;
-
-sysv4.2uw2*)
- version_type=linux
- library_names_spec='${libname}${release}.so.$versuffix ${libname}${release}.so.$major $libname.so'
- soname_spec='${libname}${release}.so.$major'
- shlibpath_var=LD_LIBRARY_PATH
- ;;
-
-uts4*)
- version_type=linux
- library_names_spec='${libname}${release}.so.$versuffix ${libname}${release}.so.$major $libname.so'
- soname_spec='${libname}${release}.so.$major'
- shlibpath_var=LD_LIBRARY_PATH
- ;;
-
-*)
- dynamic_linker=no
- ;;
-esac
-echo "$ac_t$dynamic_linker"
-test "$dynamic_linker" = no && can_build_shared=no
-
-# Report the final consequences.
-echo "checking if libtool supports shared libraries... $can_build_shared" 1>&6
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-echo $ac_n "checking whether to build shared libraries... $ac_c" 1>&6
-test "$can_build_shared" = "no" && enable_shared=no
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-# On AIX, shared libraries and static libraries use the same namespace, and
-# are all built from PIC.
-case "$host_os" in
-aix*)
- test "$enable_shared" = yes && enable_static=no
- if test -n "$RANLIB"; then
- archive_cmds="$archive_cmds;\$RANLIB \$lib"
- postinstall_cmds='$RANLIB $lib'
- fi
- ;;
-esac
-
-echo "$ac_t$enable_shared" 1>&6
-
-# Make sure either enable_shared or enable_static is yes.
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-
-echo "checking whether to build static libraries... $enable_static" 1>&6
-
-echo $ac_n "checking for objdir... $ac_c" 1>&6
-rm -f .libs 2>/dev/null
-mkdir .libs 2>/dev/null
-if test -d .libs; then
- objdir=.libs
-else
- # MS-DOS does not allow filenames that begin with a dot.
- objdir=_libs
-fi
-rmdir .libs 2>/dev/null
-echo "$ac_t$objdir" 1>&6
-
-# Copy echo and quote the copy, instead of the original, because it is
-# used later.
-ltecho="$echo"
-
-# Now quote all the things that may contain metacharacters.
-for var in ltecho old_CC old_CFLAGS old_CPPFLAGS old_LD old_NM old_RANLIB \
- old_LN_S AR CC LD LN_S NM reload_flag reload_cmds wl pic_flag \
- link_static_flag no_builtin_flag export_dynamic_flag_spec \
- libname_spec library_names_spec soname_spec RANLIB \
- old_archive_cmds old_archive_from_new_cmds old_postinstall_cmds \
- old_postuninstall_cmds archive_cmds postinstall_cmds postuninstall_cmds \
- allow_undefined_flag no_undefined_flag \
- finish_cmds finish_eval global_symbol_pipe \
- hardcode_libdir_flag_spec hardcode_libdir_separator; do
-
- case "$var" in
- reload_cmds | old_archive_cmds | old_archive_from_new_cmds | \
- old_postinstall_cmds | old_postuninstall_cmds | archive_cmds | \
- postinstall_cmds | postuninstall_cmds | finish_cmds)
- # Double-quote double-evaled strings.
- eval "$var=\`\$echo \"X\$$var\" | \$Xsed -e \"\$double_quote_subst\" -e \"\$sed_quote_subst\"\`"
- ;;
- *)
- eval "$var=\`\$echo \"X\$$var\" | \$Xsed -e \"\$sed_quote_subst\"\`"
- ;;
- esac
-done
-
-ofile=libtool
-trap "$rm $ofile; exit 1" 1 2 15
-echo creating $ofile
-$rm $ofile
-cat <<EOF > $ofile
-#! /bin/sh
-
-# libtool - Provide generalized library-building support services.
-# Generated automatically by $PROGRAM - GNU $PACKAGE $VERSION
-# NOTE: Changes made to this file will be lost: look at ltconfig or ltmain.sh.
-#
-# Copyright (C) 1996-1998 Free Software Foundation, Inc.
-# Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# As a special exception to the GNU General Public License, if you
-# distribute this file as part of a program that contains a
-# configuration script generated by Autoconf, you may include it under
-# the same distribution terms that you use for the rest of that program.
-
-# This program was configured as follows,
-# on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
-#
-# CC="$old_CC" CFLAGS="$old_CFLAGS" CPPFLAGS="$old_CPPFLAGS" \\
-# LD="$old_LD" NM="$old_NM" RANLIB="$old_RANLIB" LN_S="$old_LN_S" \\
-# $0$ltconfig_args
-#
-# Compiler and other test output produced by $progname, useful for
-# debugging $progname, is in ./config.log if it exists.
-
-# Sed that helps us avoid accidentally triggering echo(1) options like -n.
-Xsed="sed -e s/^X//"
-
-# The HP-UX ksh and POSIX shell print the target directory to stdout
-# if CDPATH is set.
-if test "\${CDPATH+set}" = set; then CDPATH=; export CDPATH; fi
-
-# An echo program that does not interpret backslashes.
-echo="$ltecho"
-
-# The version of $progname that generated this script.
-LTCONFIG_VERSION="$VERSION"
-
-# Shell to use when invoking shell scripts.
-SHELL=${CONFIG_SHELL-/bin/sh}
-
-# Whether or not to build libtool libraries.
-build_libtool_libs=$enable_shared
-
-# Whether or not to build old-style libraries.
-build_old_libs=$enable_static
-
-# The host system.
-host_alias="$host_alias"
-host="$host"
-
-# The archiver.
-AR="$AR"
-
-# The default C compiler.
-CC="$CC"
-
-# The linker used to build libraries.
-LD="$LD"
-
-# Whether we need hard or soft links.
-LN_S="$LN_S"
-
-# A BSD-compatible nm program.
-NM="$NM"
-
-# The name of the directory that contains temporary libtool files.
-objdir="$objdir"
-
-# How to create reloadable object files.
-reload_flag="$reload_flag"
-reload_cmds="$reload_cmds"
-
-# How to pass a linker flag through the compiler.
-wl="$wl"
-
-# Additional compiler flags for building library objects.
-pic_flag="$pic_flag"
-
-# Compiler flag to prevent dynamic linking.
-link_static_flag="$link_static_flag"
-
-# Compiler flag to turn off builtin functions.
-no_builtin_flag="$no_builtin_flag"
-
-# Compiler flag to allow reflexive dlopens.
-export_dynamic_flag_spec="$export_dynamic_flag_spec"
-
-# Library versioning type.
-version_type=$version_type
-
-# Format of library name prefix.
-libname_spec="$libname_spec"
-
-# List of archive names. First name is the real one, the rest are links.
-# The last name is the one that the linker finds with -lNAME.
-library_names_spec="$library_names_spec"
-
-# The coded name of the library, if different from the real name.
-soname_spec="$soname_spec"
-
-# Commands used to build and install an old-style archive.
-RANLIB="$RANLIB"
-old_archive_cmds="$old_archive_cmds"
-old_postinstall_cmds="$old_postinstall_cmds"
-old_postuninstall_cmds="$old_postuninstall_cmds"
-
-# Create an old-style archive from a shared archive.
-old_archive_from_new_cmds="$old_archive_from_new_cmds"
-
-# Commands used to build and install a shared archive.
-archive_cmds="$archive_cmds"
-postinstall_cmds="$postinstall_cmds"
-postuninstall_cmds="$postuninstall_cmds"
-
-# Flag that allows shared libraries with undefined symbols to be built.
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-
-# Flag that forces no undefined symbols.
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-# Commands used to finish a libtool library installation in a directory.
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-# Same as above, but a single script fragment to be evaled but not shown.
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-# Take the output of nm and produce a listing of raw symbols and C names.
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-# This is the shared library runtime path variable.
-runpath_var=$runpath_var
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-# This is the shared library path variable.
-shlibpath_var=$shlibpath_var
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-# How to hardcode a shared library path into an executable.
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-# Set to yes if using DIR/libNAME.so during linking hardcodes DIR into the
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-# Set to yes if using the -LDIR flag during linking hardcodes DIR into the
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-# Set to yes if using SHLIBPATH_VAR=DIR during linking hardcodes DIR into
-# the resulting binary.
-hardcode_shlibpath_var=$hardcode_shlibpath_var
-
-EOF
-
-case "$host_os" in
-aix3*)
- cat <<\EOF >> $ofile
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-
-# Append the ltmain.sh script.
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-chmod +x $ofile
-exit 0
-
-# Local Variables:
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-# sh-indentation:2
-# End:
+++ /dev/null
-# ltmain.sh - Provide generalized library-building support services.
-# NOTE: Changing this file will not affect anything until you rerun ltconfig.
-#
-# Copyright (C) 1996-1998 Free Software Foundation, Inc.
-# Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-#
-# As a special exception to the GNU General Public License, if you
-# distribute this file as part of a program that contains a
-# configuration script generated by Autoconf, you may include it under
-# the same distribution terms that you use for the rest of that program.
-
-# The name of this program.
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-# Sed substitution that helps us do robust quoting. It backslashifies
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-sed_quote_subst='s/\([\\`\\"$\\\\]\)/\\\1/g'
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-# NLS nuisances.
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- echo "Fatal configuration error. See the $PACKAGE docs for more information." 1>&2
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-if test "$build_libtool_libs" != yes && test "$build_old_libs" != yes; then
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- -static)
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- # Accept the current argument as the source file.
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- *.asm) xform=asm ;;
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- release)
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- rpath)
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- case "$arg" in
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-
- -dlopen)
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- -dlpreopen)
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- arg=
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-
- # Add the symbol object into the linking commands.
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- finalize_command="$finalize_command @SYMFILE@"
- fi
- ;;
-
- -L*)
- dir=`$echo "X$arg" | $Xsed -e 's%^-L\(.*\)$%\1%'`
- case "$dir" in
- /* | [A-Za-z]:\\*)
- # Add the corresponding hardcode_libdir_flag, if it is not identical.
- ;;
- *)
- $echo "$modename: \`-L$dir' cannot specify a relative directory" 1>&2
- exit 1
- ;;
- esac
- deplibs="$deplibs $arg"
- ;;
-
- -l*) deplibs="$deplibs $arg" ;;
-
- -no-undefined)
- allow_undefined=no
- continue
- ;;
-
- -o) prev=output ;;
-
- -release)
- prev=release
- continue
- ;;
-
- -rpath)
- prev=rpath
- continue
- ;;
-
- -static)
- # If we have no pic_flag, then this is the same as -all-static.
- if test -z "$pic_flag" && test -n "$link_static_flag"; then
- compile_command="$compile_command $link_static_flag"
- finalize_command="$finalize_command $link_static_flag"
- fi
- continue
- ;;
-
- -version-info)
- prev=vinfo
- continue
- ;;
-
- # Some other compiler flag.
- -* | +*)
- # Unknown arguments in both finalize_command and compile_command need
- # to be aesthetically quoted because they are evaled later.
- arg=`$echo "X$arg" | $Xsed -e "$sed_quote_subst"`
- case "$arg" in
- *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \ ]*|*]*)
- arg="\"$arg\""
- ;;
- esac
- ;;
-
- *.o | *.a)
- # A standard object.
- objs="$objs $arg"
- ;;
-
- *.lo)
- # A library object.
- if test "$prev" = dlfiles; then
- dlfiles="$dlfiles $arg"
- if test "$build_libtool_libs" = yes; then
- prev=
- continue
- else
- # If libtool objects are unsupported, then we need to preload.
- prev=dlprefiles
- fi
- fi
-
- if test "$prev" = dlprefiles; then
- # Preload the old-style object.
- dlprefiles="$dlprefiles "`$echo "X$arg" | $Xsed -e 's/\.lo$/\.o/'`
- prev=
- fi
- libobjs="$libobjs $arg"
- ;;
-
- *.la)
- # A libtool-controlled library.
-
- dlname=
- libdir=
- library_names=
- old_library=
-
- # Check to see that this really is a libtool archive.
- if (sed -e '2q' $arg | egrep '^# Generated by ltmain\.sh') >/dev/null 2>&1; then :
- else
- $echo "$modename: \`$arg' is not a valid libtool archive" 1>&2
- exit 1
- fi
-
- # If there is no directory component, then add one.
- case "$arg" in
- */* | *\\*) . $arg ;;
- *) . ./$arg ;;
- esac
-
- if test -z "$libdir"; then
- $echo "$modename: \`$arg' contains no -rpath information" 1>&2
- exit 1
- fi
-
- # Get the name of the library we link against.
- linklib=
- for l in $old_library $library_names; do
- linklib="$l"
- done
-
- if test -z "$linklib"; then
- $echo "$modename: cannot find name of link library for \`$arg'" 1>&2
- exit 1
- fi
-
- # Find the relevant object directory and library name.
- name=`$echo "X$arg" | $Xsed -e 's%^.*/%%' -e 's/\.la$//' -e 's/^lib//'`
- dir=`$echo "X$arg" | $Xsed -e 's%/[^/]*$%%'`
- if test "X$dir" = "X$arg"; then
- dir="$objdir"
- else
- dir="$dir/$objdir"
- fi
-
- # This library was specified with -dlopen.
- if test "$prev" = dlfiles; then
- dlfiles="$dlfiles $arg"
- if test -z "$dlname"; then
- # If there is no dlname, we need to preload.
- prev=dlprefiles
- else
- # We should not create a dependency on this library, but we
- # may need any libraries it requires.
- compile_command="$compile_command$dependency_libs"
- finalize_command="$finalize_command$dependency_libs"
- prev=
- continue
- fi
- fi
-
- # The library was specified with -dlpreopen.
- if test "$prev" = dlprefiles; then
- # Prefer using a static library (so that no silly _DYNAMIC symbols
- # are required to link).
- if test -n "$old_library"; then
- dlprefiles="$dlprefiles $dir/$old_library"
- else
- dlprefiles="$dlprefiles $dir/$linklib"
- fi
- prev=
- fi
-
- if test "$build_libtool_libs" = yes && test -n "$library_names"; then
- link_against_libtool_libs="$link_against_libtool_libs $arg"
- if test -n "$shlibpath_var"; then
- # Make sure the rpath contains only unique directories.
- case "$temp_rpath " in
- *" $dir "*) ;;
- *) temp_rpath="$temp_rpath $dir" ;;
- esac
- fi
-
- # This is the magic to use -rpath.
- if test -n "$hardcode_libdir_flag_spec"; then
- if test -n "$hardcode_libdir_separator"; then
- if test -z "$hardcode_libdirs"; then
- # Put the magic libdir with the hardcode flag.
- hardcode_libdirs="$libdir"
- libdir="@HARDCODE_LIBDIRS@"
- else
- # Just accumulate the unique libdirs.
- case "$hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator" in
- *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*)
- ;;
- *)
- hardcode_libdirs="$hardcode_libdirs$hardcode_libdir_separator$libdir"
- ;;
- esac
- libdir=
- fi
- fi
-
- if test -n "$libdir"; then
- eval flag=\"$hardcode_libdir_flag_spec\"
-
- compile_command="$compile_command $flag"
- finalize_command="$finalize_command $flag"
- fi
- elif test -n "$runpath_var"; then
- # Do the same for the permanent run path.
- case "$perm_rpath " in
- *" $libdir "*) ;;
- *) perm_rpath="$perm_rpath $libdir" ;;
- esac
- fi
-
-
- case "$hardcode_action" in
- immediate)
- if test "$hardcode_direct" = no; then
- compile_command="$compile_command $dir/$linklib"
- elif test "$hardcode_minus_L" = no; then
- compile_command="$compile_command -L$dir -l$name"
- elif test "$hardcode_shlibpath_var" = no; then
- compile_shlibpath="$compile_shlibpath$dir:"
- compile_command="$compile_command -l$name"
- fi
- ;;
-
- relink)
- # We need an absolute path.
- case "$dir" in
- /* | [A-Za-z]:\\*) ;;
- *)
- absdir=`cd "$dir" && pwd`
- if test -z "$absdir"; then
- $echo "$modename: cannot determine absolute directory name of \`$dir'" 1>&2
- exit 1
- fi
- dir="$absdir"
- ;;
- esac
-
- if test "$hardcode_direct" = yes; then
- compile_command="$compile_command $dir/$linklib"
- elif test "$hardcode_minus_L" = yes; then
- compile_command="$compile_command -L$dir -l$name"
- elif test "$hardcode_shlibpath_var" = yes; then
- compile_shlibpath="$compile_shlibpath$dir:"
- compile_command="$compile_command -l$name"
- fi
- ;;
-
- *)
- $echo "$modename: \`$hardcode_action' is an unknown hardcode action" 1>&2
- exit 1
- ;;
- esac
-
- # Finalize command for both is simple: just hardcode it.
- if test "$hardcode_direct" = yes; then
- finalize_command="$finalize_command $libdir/$linklib"
- elif test "$hardcode_minus_L" = yes; then
- finalize_command="$finalize_command -L$libdir -l$name"
- elif test "$hardcode_shlibpath_var" = yes; then
- finalize_shlibpath="$finalize_shlibpath$libdir:"
- finalize_command="$finalize_command -l$name"
- else
- # We cannot seem to hardcode it, guess we'll fake it.
- finalize_command="$finalize_command -L$libdir -l$name"
- fi
- else
- # Transform directly to old archives if we don't build new libraries.
- if test -n "$pic_flag" && test -z "$old_library"; then
- $echo "$modename: cannot find static library for \`$arg'" 1>&2
- exit 1
- fi
-
- # Here we assume that one of hardcode_direct or hardcode_minus_L
- # is not unsupported. This is valid on all known static and
- # shared platforms.
- if test "$hardcode_direct" != unsupported; then
- test -n "$old_library" && linklib="$old_library"
- compile_command="$compile_command $dir/$linklib"
- finalize_command="$finalize_command $dir/$linklib"
- else
- compile_command="$compile_command -L$dir -l$name"
- finalize_command="$finalize_command -L$dir -l$name"
- fi
- fi
-
- # Add in any libraries that this one depends upon.
- compile_command="$compile_command$dependency_libs"
- finalize_command="$finalize_command$dependency_libs"
- continue
- ;;
-
- # Some other compiler argument.
- *)
- # Unknown arguments in both finalize_command and compile_command need
- # to be aesthetically quoted because they are evaled later.
- arg=`$echo "X$arg" | $Xsed -e "$sed_quote_subst"`
- case "$arg" in
- *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \ ]*|*]*)
- arg="\"$arg\""
- ;;
- esac
- ;;
- esac
-
- # Now actually substitute the argument into the commands.
- if test -n "$arg"; then
- compile_command="$compile_command $arg"
- finalize_command="$finalize_command $arg"
- fi
- done
-
- if test -n "$prev"; then
- $echo "$modename: the \`$prevarg' option requires an argument" 1>&2
- $echo "$help" 1>&2
- exit 1
- fi
-
- if test -n "$vinfo" && test -n "$release"; then
- $echo "$modename: you cannot specify both \`-version-info' and \`-release'" 1>&2
- $echo "$help" 1>&2
- exit 1
- fi
-
- oldlib=
- oldobjs=
- case "$output" in
- "")
- $echo "$modename: you must specify an output file" 1>&2
- $echo "$help" 1>&2
- exit 1
- ;;
-
- */* | *\\*)
- $echo "$modename: output file \`$output' must have no directory components" 1>&2
- exit 1
- ;;
-
- *.a)
- # Now set the variables for building old libraries.
- build_libtool_libs=no
- build_old_libs=yes
- oldlib="$output"
- $show "$rm $oldlib"
- $run $rm $oldlib
- ;;
-
- *.la)
- # Make sure we only generate libraries of the form `libNAME.la'.
- case "$output" in
- lib*) ;;
- *)
- $echo "$modename: libtool library \`$arg' must begin with \`lib'" 1>&2
- $echo "$help" 1>&2
- exit 1
- ;;
- esac
-
- name=`$echo "X$output" | $Xsed -e 's/\.la$//' -e 's/^lib//'`
- eval libname=\"$libname_spec\"
-
- # All the library-specific variables (install_libdir is set above).
- library_names=
- old_library=
- dlname=
- current=0
- revision=0
- age=0
-
- if test -n "$objs"; then
- $echo "$modename: cannot build libtool library \`$output' from non-libtool objects:$objs" 2>&1
- exit 1
- fi
-
- # How the heck are we supposed to write a wrapper for a shared library?
- if test -n "$link_against_libtool_libs"; then
- $echo "$modename: libtool library \`$output' may not depend on uninstalled libraries:$link_against_libtool_libs" 1>&2
- exit 1
- fi
-
- if test -n "$dlfiles$dlprefiles"; then
- $echo "$modename: warning: \`-dlopen' is ignored while creating libtool libraries" 1>&2
- # Nullify the symbol file.
- compile_command=`$echo "X$compile_command" | $Xsed -e "s% @SYMFILE@%%"`
- finalize_command=`$echo "X$finalize_command" | $Xsed -e "s% @SYMFILE@%%"`
- fi
-
- if test -z "$rpath"; then
- $echo "$modename: you must specify an installation directory with \`-rpath'" 1>&2
- $echo "$help" 1>&2
- exit 1
- fi
-
- set dummy $rpath
- if test $# -gt 2; then
- $echo "$modename: warning: ignoring multiple \`-rpath's for a libtool library" 1>&2
- fi
- install_libdir="$2"
-
- # Parse the version information argument.
- IFS="${IFS= }"; save_ifs="$IFS"; IFS=':'
- set dummy $vinfo
- IFS="$save_ifs"
-
- if test -n "$5"; then
- $echo "$modename: too many parameters to \`-version-info'" 1>&2
- $echo "$help" 1>&2
- exit 1
- fi
-
- test -n "$2" && current="$2"
- test -n "$3" && revision="$3"
- test -n "$4" && age="$4"
-
- # Check that each of the things are valid numbers.
- case "$current" in
- 0 | [1-9] | [1-9][0-9]*) ;;
- *)
- $echo "$modename: CURRENT \`$current' is not a nonnegative integer" 1>&2
- $echo "$modename: \`$vinfo' is not valid version information" 1>&2
- exit 1
- ;;
- esac
-
- case "$revision" in
- 0 | [1-9] | [1-9][0-9]*) ;;
- *)
- $echo "$modename: REVISION \`$revision' is not a nonnegative integer" 1>&2
- $echo "$modename: \`$vinfo' is not valid version information" 1>&2
- exit 1
- ;;
- esac
-
- case "$age" in
- 0 | [1-9] | [1-9][0-9]*) ;;
- *)
- $echo "$modename: AGE \`$age' is not a nonnegative integer" 1>&2
- $echo "$modename: \`$vinfo' is not valid version information" 1>&2
- exit 1
- ;;
- esac
-
- if test $age -gt $current; then
- $echo "$modename: AGE \`$age' is greater than the current interface number \`$current'" 1>&2
- $echo "$modename: \`$vinfo' is not valid version information" 1>&2
- exit 1
- fi
-
- # Calculate the version variables.
- version_vars="version_type current age revision"
- case "$version_type" in
- none) ;;
-
- linux)
- version_vars="$version_vars major versuffix"
- major=`expr $current - $age`
- versuffix="$major.$age.$revision"
- ;;
-
- osf)
- version_vars="$version_vars versuffix verstring"
- major=`expr $current - $age`
- versuffix="$current.$age.$revision"
- verstring="$versuffix"
-
- # Add in all the interfaces that we are compatible with.
- loop=$age
- while test $loop != 0; do
- iface=`expr $current - $loop`
- loop=`expr $loop - 1`
- verstring="$verstring:${iface}.0"
- done
-
- # Make executables depend on our current version.
- verstring="$verstring:${current}.0"
- ;;
-
- sunos)
- version_vars="$version_vars major versuffix"
- major="$current"
- versuffix="$current.$revision"
- ;;
-
- *)
- $echo "$modename: unknown library version type \`$version_type'" 1>&2
- echo "Fatal configuration error. See the $PACKAGE docs for more information." 1>&2
- exit 1
- ;;
- esac
-
- # Create the output directory, or remove our outputs if we need to.
- if test -d $objdir; then
- $show "$rm $objdir/$output $objdir/$libname.* $objdir/${libname}${release}.*"
- $run $rm $objdir/$output $objdir/$libname.* $objdir/${libname}${release}.*
- else
- $show "$mkdir $objdir"
- $run $mkdir $objdir
- status=$?
- if test $status -eq 0 || test -d $objdir; then :
- else
- exit $status
- fi
- fi
-
- # Check to see if the archive will have undefined symbols.
- if test "$allow_undefined" = yes; then
- if test "$allow_undefined_flag" = unsupported; then
- $echo "$modename: warning: undefined symbols not allowed in $host shared libraries" 1>&2
- build_libtool_libs=no
- build_old_libs=yes
- fi
- else
- # Don't allow undefined symbols.
- allow_undefined_flag="$no_undefined_flag"
- fi
-
- # Add libc to deplibs on all systems.
- dependency_libs="$deplibs"
- deplibs="$deplibs -lc"
-
- if test "$build_libtool_libs" = yes; then
- # Get the real and link names of the library.
- eval library_names=\"$library_names_spec\"
- set dummy $library_names
- realname="$2"
- shift; shift
-
- if test -n "$soname_spec"; then
- eval soname=\"$soname_spec\"
- else
- soname="$realname"
- fi
-
- lib="$objdir/$realname"
- for link
- do
- linknames="$linknames $link"
- done
-
- # Use standard objects if they are PIC.
- test -z "$pic_flag" && libobjs=`$echo "X$libobjs " | $Xsed -e 's/\.lo /.o /g' -e 's/ $//g'`
-
- # Do each of the archive commands.
- eval cmds=\"$archive_cmds\"
- IFS="${IFS= }"; save_ifs="$IFS"; IFS=';'
- for cmd in $cmds; do
- IFS="$save_ifs"
- $show "$cmd"
- $run eval "$cmd" || exit $?
- done
- IFS="$save_ifs"
-
- # Create links to the real library.
- for linkname in $linknames; do
- $show "(cd $objdir && $LN_S $realname $linkname)"
- $run eval '(cd $objdir && $LN_S $realname $linkname)' || exit $?
- done
-
- # If -export-dynamic was specified, set the dlname.
- if test "$export_dynamic" = yes; then
- # On all known operating systems, these are identical.
- dlname="$soname"
- fi
- fi
-
- # Now set the variables for building old libraries.
- oldlib="$objdir/$libname.a"
- ;;
-
- *.lo | *.o)
- if test -n "$link_against_libtool_libs"; then
- $echo "$modename: error: cannot link libtool libraries into reloadable objects" 1>&2
- exit 1
- fi
-
- if test -n "$deplibs"; then
- $echo "$modename: warning: \`-l' and \`-L' are ignored while creating objects" 1>&2
- fi
-
- if test -n "$dlfiles$dlprefiles"; then
- $echo "$modename: warning: \`-dlopen' is ignored while creating objects" 1>&2
- # Nullify the symbol file.
- compile_command=`$echo "X$compile_command" | $Xsed -e "s% @SYMFILE@%%"`
- finalize_command=`$echo "X$finalize_command" | $Xsed -e "s% @SYMFILE@%%"`
- fi
-
- if test -n "$rpath"; then
- $echo "$modename: warning: \`-rpath' is ignored while creating objects" 1>&2
- fi
-
- if test -n "$vinfo"; then
- $echo "$modename: warning: \`-version-info' is ignored while creating objects" 1>&2
- fi
-
- if test -n "$release"; then
- $echo "$modename: warning: \`-release' is ignored while creating objects" 1>&2
- fi
-
- case "$output" in
- *.lo)
- if test -n "$objs"; then
- $echo "$modename: cannot build library object \`$output' from non-libtool objects" 1>&2
- exit 1
- fi
- libobj="$output"
- obj=`$echo "X$output" | $Xsed -e 's/\.lo$/.o/'`
- ;;
- *)
- libobj=
- obj="$output"
- ;;
- esac
-
- # Delete the old objects.
- $run $rm $obj $libobj
-
- # Create the old-style object.
- reload_objs="$objs"`$echo "X$libobjs " | $Xsed -e 's/[^ ]*\.a //g' -e 's/\.lo /.o /g' -e 's/ $//g'`
-
- output="$obj"
- eval cmds=\"$reload_cmds\"
- IFS="${IFS= }"; save_ifs="$IFS"; IFS=';'
- for cmd in $cmds; do
- IFS="$save_ifs"
- $show "$cmd"
- $run eval "$cmd" || exit $?
- done
- IFS="$save_ifs"
-
- # Exit if we aren't doing a library object file.
- test -z "$libobj" && exit 0
-
- if test "$build_libtool_libs" != yes; then
- # Create an invalid libtool object if no PIC, so that we don't
- # accidentally link it into a program.
- $show "echo timestamp > $libobj"
- $run eval "echo timestamp > $libobj" || exit $?
- exit 0
- fi
-
- if test -n "$pic_flag"; then
- # Only do commands if we really have different PIC objects.
- reload_objs="$libobjs"
- output="$libobj"
- eval cmds=\"$reload_cmds\"
- IFS="${IFS= }"; save_ifs="$IFS"; IFS=';'
- for cmd in $cmds; do
- IFS="$save_ifs"
- $show "$cmd"
- $run eval "$cmd" || exit $?
- done
- IFS="$save_ifs"
- else
- # Just create a symlink.
- $show "$LN_S $obj $libobj"
- $run $LN_S $obj $libobj || exit 1
- fi
-
- exit 0
- ;;
-
- *)
- if test -n "$vinfo"; then
- $echo "$modename: warning: \`-version-info' is ignored while linking programs" 1>&2
- fi
-
- if test -n "$release"; then
- $echo "$modename: warning: \`-release' is ignored while creating objects" 1>&2
- fi
-
- if test -n "$rpath"; then
- # If the user specified any rpath flags, then add them.
- for libdir in $rpath; do
- if test -n "$hardcode_libdir_flag_spec"; then
- if test -n "$hardcode_libdir_separator"; then
- if test -z "$hardcode_libdirs"; then
- # Put the magic libdir with the hardcode flag.
- hardcode_libdirs="$libdir"
- libdir="@HARDCODE_LIBDIRS@"
- else
- # Just accumulate the unique libdirs.
- case "$hardcode_libdir_separator$hardcode_libdirs$hardcode_libdir_separator" in
- *"$hardcode_libdir_separator$libdir$hardcode_libdir_separator"*)
- ;;
- *)
- hardcode_libdirs="$hardcode_libdirs$hardcode_libdir_separator$libdir"
- ;;
- esac
- libdir=
- fi
- fi
-
- if test -n "$libdir"; then
- eval flag=\"$hardcode_libdir_flag_spec\"
-
- compile_command="$compile_command $flag"
- finalize_command="$finalize_command $flag"
- fi
- elif test -n "$runpath_var"; then
- case "$perm_rpath " in
- *" $libdir "*) ;;
- *) perm_rpath="$perm_rpath $libdir" ;;
- esac
- fi
- done
- fi
-
- # Substitute the hardcoded libdirs into the compile commands.
- if test -n "$hardcode_libdir_separator"; then
- compile_command=`$echo "X$compile_command" | $Xsed -e "s%@HARDCODE_LIBDIRS@%$hardcode_libdirs%g"`
- finalize_command=`$echo "X$finalize_command" | $Xsed -e "s%@HARDCODE_LIBDIRS@%$hardcode_libdirs%g"`
- fi
-
- if test -n "$libobjs" && test "$build_old_libs" = yes; then
- # Transform all the library objects into standard objects.
- compile_command=`$echo "X$compile_command " | $Xsed -e 's/\.lo /.o /g' -e 's/ $//'`
- finalize_command=`$echo "X$finalize_command " | $Xsed -e 's/\.lo /.o /g' -e 's/ $//'`
- fi
-
- if test "$export_dynamic" = yes && test -n "$NM" && test -n "$global_symbol_pipe"; then
- dlsyms="${output}S.c"
- else
- dlsyms=
- fi
-
- if test -n "$dlsyms"; then
- # Add our own program objects to the preloaded list.
- dlprefiles=`$echo "X$objs$dlprefiles " | $Xsed -e 's/\.lo /.o /g' -e 's/ $//'`
-
- # Discover the nlist of each of the dlfiles.
- nlist="$objdir/${output}.nm"
-
- if test -d $objdir; then
- $show "$rm $nlist ${nlist}T"
- $run $rm "$nlist" "${nlist}T"
- else
- $show "$mkdir $objdir"
- $run $mkdir $objdir
- status=$?
- if test $status -eq 0 || test -d $objdir; then :
- else
- exit $status
- fi
- fi
-
- for arg in $dlprefiles; do
- $show "extracting global C symbols from \`$arg'"
- $run eval "$NM $arg | $global_symbol_pipe >> '$nlist'"
- done
-
- # Parse the name list into a source file.
- $show "creating $objdir/$dlsyms"
- if test -z "$run"; then
- # Make sure we at least have an empty file.
- test -f "$nlist" || : > "$nlist"
-
- # Try sorting and uniquifying the output.
- if sort "$nlist" | uniq > "$nlist"T; then
- mv -f "$nlist"T "$nlist"
- wcout=`wc "$nlist" 2>/dev/null`
- count=`echo "X$wcout" | $Xsed -e 's/^[ ]*\([0-9][0-9]*\).*$/\1/'`
- (test "$count" -ge 0) 2>/dev/null || count=-1
- else
- $rm "$nlist"T
- count=-1
- fi
-
- case "$dlsyms" in
- "") ;;
- *.c)
- $echo > "$objdir/$dlsyms" "\
-/* $dlsyms - symbol resolution table for \`$output' dlsym emulation. */
-/* Generated by $PROGRAM - GNU $PACKAGE $VERSION */
-
-#ifdef __cplusplus
-extern \"C\" {
-#endif
-
-/* Prevent the only kind of declaration conflicts we can make. */
-#define dld_preloaded_symbol_count some_other_symbol
-#define dld_preloaded_symbols some_other_symbol
-
-/* External symbol declarations for the compiler. */\
-"
-
- if test -f "$nlist"; then
- sed -e 's/^.* \(.*\)$/extern char \1;/' < "$nlist" >> "$objdir/$dlsyms"
- else
- echo '/* NONE */' >> "$objdir/$dlsyms"
- fi
-
- $echo >> "$objdir/$dlsyms" "\
-
-#undef dld_preloaded_symbol_count
-#undef dld_preloaded_symbols
-
-#if defined (__STDC__) && __STDC__
-# define __ptr_t void *
-#else
-# define __ptr_t char *
-#endif
-
-/* The number of symbols in dld_preloaded_symbols, -1 if unsorted. */
-int dld_preloaded_symbol_count = $count;
-
-/* The mapping between symbol names and symbols. */
-struct {
- char *name;
- __ptr_t address;
-}
-dld_preloaded_symbols[] =
-{\
-"
-
- if test -f "$nlist"; then
- sed 's/^\(.*\) \(.*\)$/ {"\1", (__ptr_t) \&\2},/' < "$nlist" >> "$objdir/$dlsyms"
- fi
-
- $echo >> "$objdir/$dlsyms" "\
- {0, (__ptr_t) 0}
-};
-
-#ifdef __cplusplus
-}
-#endif\
-"
- ;;
-
- *)
- $echo "$modename: unknown suffix for \`$dlsyms'" 1>&2
- exit 1
- ;;
- esac
- fi
-
- # Now compile the dynamic symbol file.
- $show "(cd $objdir && $CC -c$no_builtin_flag \"$dlsyms\")"
- $run eval '(cd $objdir && $CC -c$no_builtin_flag "$dlsyms")' || exit $?
-
- # Transform the symbol file into the correct name.
- compile_command=`$echo "X$compile_command" | $Xsed -e "s%@SYMFILE@%$objdir/${output}S.o%"`
- finalize_command=`$echo "X$finalize_command" | $Xsed -e "s%@SYMFILE@%$objdir/${output}S.o%"`
- elif test "$export_dynamic" != yes; then
- test -n "$dlfiles$dlprefiles" && $echo "$modename: warning: \`-dlopen' and \`-dlpreopen' are ignored without \`-export-dynamic'" 1>&2
- else
- # We keep going just in case the user didn't refer to
- # dld_preloaded_symbols. The linker will fail if global_symbol_pipe
- # really was required.
- $echo "$modename: not configured to extract global symbols from dlpreopened files" 1>&2
-
- # Nullify the symbol file.
- compile_command=`$echo "X$compile_command" | $Xsed -e "s% @SYMFILE@%%"`
- finalize_command=`$echo "X$finalize_command" | $Xsed -e "s% @SYMFILE@%%"`
- fi
-
- if test -z "$link_against_libtool_libs" || test "$build_libtool_libs" != yes; then
- # Replace the output file specification.
- compile_command=`$echo "X$compile_command" | $Xsed -e 's%@OUTPUT@%'"$output"'%g'`
- finalize_command=`$echo "X$finalize_command" | $Xsed -e 's%@OUTPUT@%'"$output"'%g'`
-
- # We have no uninstalled library dependencies, so finalize right now.
- $show "$compile_command"
- $run eval "$compile_command"
- exit $?
- fi
-
- # Replace the output file specification.
- compile_command=`$echo "X$compile_command" | $Xsed -e 's%@OUTPUT@%'"$objdir/$output"'%g'`
- finalize_command=`$echo "X$finalize_command" | $Xsed -e 's%@OUTPUT@%'"$objdir/$output"'T%g'`
-
- # Create the binary in the object directory, then wrap it.
- if test -d $objdir; then :
- else
- $show "$mkdir $objdir"
- $run $mkdir $objdir
- status=$?
- if test $status -eq 0 || test -d $objdir; then :
- else
- exit $status
- fi
- fi
-
- if test -n "$shlibpath_var"; then
- # We should set the shlibpath_var
- rpath=
- for dir in $temp_rpath; do
- case "$dir" in
- /* | [A-Za-z]:\\*)
- # Absolute path.
- rpath="$rpath$dir:"
- ;;
- *)
- # Relative path: add a thisdir entry.
- rpath="$rpath\$thisdir/$dir:"
- ;;
- esac
- done
- temp_rpath="$rpath"
- fi
-
- # Delete the old output file.
- $run $rm $output
-
- if test -n "$compile_shlibpath"; then
- compile_command="$shlibpath_var=\"$compile_shlibpath\$$shlibpath_var\" $compile_command"
- fi
- if test -n "$finalize_shlibpath"; then
- finalize_command="$shlibpath_var=\"$finalize_shlibpath\$$shlibpath_var\" $finalize_command"
- fi
-
- if test -n "$runpath_var" && test -n "$perm_rpath"; then
- # We should set the runpath_var.
- rpath=
- for dir in $perm_rpath; do
- rpath="$rpath$dir:"
- done
- compile_command="$runpath_var=\"$rpath\$$runpath_var\" $compile_command"
- finalize_command="$runpath_var=\"$rpath\$$runpath_var\" $finalize_command"
- fi
-
- case "$hardcode_action" in
- relink)
- # AGH! Flame the AIX and HP-UX people for me, will ya?
- $echo "$modename: warning: using a buggy system linker" 1>&2
- $echo "$modename: relinking will be required before \`$output' can be installed" 1>&2
- ;;
- esac
-
- $show "$compile_command"
- $run eval "$compile_command" || exit $?
-
- # Now create the wrapper script.
- $show "creating $output"
-
- # Quote the finalize command for shipping.
- finalize_command=`$echo "X$finalize_command" | $Xsed -e "$sed_quote_subst"`
-
- # Quote $echo for shipping.
- qecho=`$echo "X$echo" | $Xsed -e "$sed_quote_subst"`
-
- # Only actually do things if our run command is non-null.
- if test -z "$run"; then
- $rm $output
- trap "$rm $output; exit 1" 1 2 15
-
- $echo > $output "\
-#! /bin/sh
-
-# $output - temporary wrapper script for $objdir/$output
-# Generated by ltmain.sh - GNU $PACKAGE $VERSION
-#
-# The $output program cannot be directly executed until all the libtool
-# libraries that it depends on are installed.
-#
-# This wrapper script should never be moved out of \``pwd`'.
-# If it is, it will not operate correctly.
-
-# Sed substitution that helps us do robust quoting. It backslashifies
-# metacharacters that are still active within double-quoted strings.
-Xsed='sed -e s/^X//'
-sed_quote_subst='$sed_quote_subst'
-
-# The HP-UX ksh and POSIX shell print the target directory to stdout
-# if CDPATH is set.
-if test \"\${CDPATH+set}\" = set; then CDPATH=; export CDPATH; fi
-
-# This environment variable determines our operation mode.
-if test \"\$libtool_install_magic\" = \"$magic\"; then
- # install mode needs the following variables:
- link_against_libtool_libs='$link_against_libtool_libs'
- finalize_command=\"$finalize_command\"
-else
- # When we are sourced in execute mode, \$file and \$echo are already set.
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- else
- echo=\"$qecho\"
- file=\"\$0\"
- fi\
-"
- $echo >> $output "\
-
- # Find the directory that this script lives in.
- thisdir=\`\$echo \"X\$file\" | \$Xsed -e 's%/[^/]*$%%'\`
- test \"x\$thisdir\" = \"x\$file\" && thisdir=.
-
- # Follow symbolic links until we get to the real thisdir.
- file=\`ls -ld \"\$file\" | sed -n 's/.*-> //p'\`
- while test -n \"\$file\"; do
- destdir=\`\$echo \"X\$file\" | \$Xsed -e 's%/[^/]*\$%%'\`
-
- # If there was a directory component, then change thisdir.
- if test \"x\$destdir\" != \"x\$file\"; then
- case \"\$destdir\" in
- /* | [A-Za-z]:\\*) thisdir=\"\$destdir\" ;;
- *) thisdir=\"\$thisdir/\$destdir\" ;;
- esac
- fi
-
- file=\`\$echo \"X\$file\" | \$Xsed -e 's%^.*/%%'\`
- file=\`ls -ld \"\$thisdir/\$file\" | sed -n 's/.*-> //p'\`
- done
-
- # Try to get the absolute directory name.
- absdir=\`cd \"\$thisdir\" && pwd\`
- test -n \"\$absdir\" && thisdir=\"\$absdir\"
-
- progdir=\"\$thisdir/$objdir\"
- program='$output'
-
- if test -f \"\$progdir/\$program\"; then"
-
- # Export our shlibpath_var if we have one.
- if test -n "$shlibpath_var" && test -n "$temp_rpath"; then
- $echo >> $output "\
- # Add our own library path to $shlibpath_var
- $shlibpath_var=\"$temp_rpath\$$shlibpath_var\"
-
- # Some systems cannot cope with colon-terminated $shlibpath_var
- $shlibpath_var=\`\$echo \"X\$$shlibpath_var\" | \$Xsed -e 's/:*\$//'\`
-
- export $shlibpath_var
-"
- fi
-
- $echo >> $output "\
- if test \"\$libtool_execute_magic\" != \"$magic\"; then
- # Run the actual program with our arguments.
-
- # Export the path to the program.
- PATH=\"\$progdir:\$PATH\"
- export PATH
-
- exec \$program \${1+\"\$@\"}
-
- \$echo \"\$0: cannot exec \$program \${1+\"\$@\"}\"
- exit 1
- fi
- else
- # The program doesn't exist.
- \$echo \"\$0: error: \$progdir/\$program does not exist\" 1>&2
- \$echo \"This script is just a wrapper for \$program.\" 1>&2
- echo \"See the $PACKAGE documentation for more information.\" 1>&2
- exit 1
- fi
-fi\
-"
- chmod +x $output
- fi
- exit 0
- ;;
- esac
-
- # See if we need to build an old-fashioned archive.
- if test "$build_old_libs" = "yes"; then
- # Transform .lo files to .o files.
- oldobjs="$objs"`$echo "X$libobjs " | $Xsed -e 's/[^ ]*\.a //g' -e 's/\.lo /.o /g' -e 's/ $//g'`
-
- # Do each command in the archive commands.
- if test -n "$old_archive_from_new_cmds" && test "$build_libtool_libs" = yes; then
- eval cmds=\"$old_archive_from_new_cmds\"
- else
- eval cmds=\"$old_archive_cmds\"
- fi
- IFS="${IFS= }"; save_ifs="$IFS"; IFS=';'
- for cmd in $cmds; do
- IFS="$save_ifs"
- $show "$cmd"
- $run eval "$cmd" || exit $?
- done
- IFS="$save_ifs"
- fi
-
- # Now create the libtool archive.
- case "$output" in
- *.la)
- old_library=
- test "$build_old_libs" = yes && old_library="$libname.a"
-
- $show "creating $output"
-
- # Only create the output if not a dry run.
- if test -z "$run"; then
- $echo > $output "\
-# $output - a libtool library file
-# Generated by ltmain.sh - GNU $PACKAGE $VERSION
-
-# The name that we can dlopen(3).
-dlname='$dlname'
-
-# Names of this library.
-library_names='$library_names'
-
-# The name of the static archive.
-old_library='$old_library'
-
-# Libraries that this one depends upon.
-dependency_libs='$dependency_libs'
-
-# Version information for $libname.
-current=$current
-age=$age
-revision=$revision
-
-# Directory that this library needs to be installed in:
-libdir='$install_libdir'\
-"
- fi
-
- # Do a symbolic link so that the libtool archive can be found in
- # LD_LIBRARY_PATH before the program is installed.
- $show "(cd $objdir && $LN_S ../$output $output)"
- $run eval "(cd $objdir && $LN_S ../$output $output)" || exit 1
- ;;
- esac
- exit 0
- ;;
-
- # libtool install mode
- install)
- modename="$modename: install"
-
- # There may be an optional /bin/sh argument at the beginning of
- # install_prog (especially on Windows NT).
- if test "$nonopt" = "$SHELL"; then
- # Aesthetically quote it.
- arg=`$echo "X$nonopt" | $Xsed -e "$sed_quote_subst"`
- case "$arg" in
- *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \ ]*|*]*)
- arg="\"$arg\""
- ;;
- esac
- install_prog="$arg "
- arg="$1"
- shift
- else
- install_prog=
- arg="$nonopt"
- fi
-
- # The real first argument should be the name of the installation program.
- # Aesthetically quote it.
- arg=`$echo "X$arg" | $Xsed -e "$sed_quote_subst"`
- case "$arg" in
- *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \ ]*|*]*)
- arg="\"$arg\""
- ;;
- esac
- install_prog="$install_prog$arg"
-
- # We need to accept at least all the BSD install flags.
- dest=
- files=
- opts=
- prev=
- install_type=
- isdir=
- stripme=
- for arg
- do
- if test -n "$dest"; then
- files="$files $dest"
- dest="$arg"
- continue
- fi
-
- case "$arg" in
- -d) isdir=yes ;;
- -f) prev="-f" ;;
- -g) prev="-g" ;;
- -m) prev="-m" ;;
- -o) prev="-o" ;;
- -s)
- stripme=" -s"
- continue
- ;;
- -*) ;;
-
- *)
- # If the previous option needed an argument, then skip it.
- if test -n "$prev"; then
- prev=
- else
- dest="$arg"
- continue
- fi
- ;;
- esac
-
- # Aesthetically quote the argument.
- arg=`$echo "X$arg" | $Xsed -e "$sed_quote_subst"`
- case "$arg" in
- *[\[\~\#\^\&\*\(\)\{\}\|\;\<\>\?\'\ \ ]*|*]*)
- arg="\"$arg\""
- ;;
- esac
- install_prog="$install_prog $arg"
- done
-
- if test -z "$install_prog"; then
- $echo "$modename: you must specify an install program" 1>&2
- $echo "$help" 1>&2
- exit 1
- fi
-
- if test -n "$prev"; then
- $echo "$modename: the \`$prev' option requires an argument" 1>&2
- $echo "$help" 1>&2
- exit 1
- fi
-
- if test -z "$files"; then
- if test -z "$dest"; then
- $echo "$modename: no file or destination specified" 1>&2
- else
- $echo "$modename: you must specify a destination" 1>&2
- fi
- $echo "$help" 1>&2
- exit 1
- fi
-
- # Strip any trailing slash from the destination.
- dest=`$echo "X$dest" | $Xsed -e 's%/$%%'`
-
- # Check to see that the destination is a directory.
- test -d "$dest" && isdir=yes
- if test -n "$isdir"; then
- destdir="$dest"
- destname=
- else
- destdir=`$echo "X$dest" | $Xsed -e 's%/[^/]*$%%'`
- test "X$destdir" = "X$dest" && destdir=.
- destname=`$echo "X$dest" | $Xsed -e 's%^.*/%%'`
-
- # Not a directory, so check to see that there is only one file specified.
- set dummy $files
- if test $# -gt 2; then
- $echo "$modename: \`$dest' is not a directory" 1>&2
- $echo "$help" 1>&2
- exit 1
- fi
- fi
- case "$destdir" in
- /* | [A-Za-z]:\\*) ;;
- *)
- for file in $files; do
- case "$file" in
- *.lo) ;;
- *)
- $echo "$modename: \`$destdir' must be an absolute directory name" 1>&2
- $echo "$help" 1>&2
- exit 1
- ;;
- esac
- done
- ;;
- esac
-
- # This variable tells wrapper scripts just to set variables rather
- # than running their programs.
- libtool_install_magic="$magic"
-
- staticlibs=
- future_libdirs=
- current_libdirs=
- for file in $files; do
-
- # Do each installation.
- case "$file" in
- *.a)
- # Do the static libraries later.
- staticlibs="$staticlibs $file"
- ;;
-
- *.la)
- # Check to see that this really is a libtool archive.
- if (sed -e '2q' $file | egrep '^# Generated by ltmain\.sh') >/dev/null 2>&1; then :
- else
- $echo "$modename: \`$file' is not a valid libtool archive" 1>&2
- $echo "$help" 1>&2
- exit 1
- fi
-
- library_names=
- old_library=
- # If there is no directory component, then add one.
- case "$file" in
- */* | *\\*) . $file ;;
- *) . ./$file ;;
- esac
-
- # Add the libdir to current_libdirs if it is the destination.
- if test "X$destdir" = "X$libdir"; then
- case "$current_libdirs " in
- *" $libdir "*) ;;
- *) current_libdirs="$current_libdirs $libdir" ;;
- esac
- else
- # Note the libdir as a future libdir.
- case "$future_libdirs " in
- *" $libdir "*) ;;
- *) future_libdirs="$future_libdirs $libdir" ;;
- esac
- fi
-
- dir="`$echo "X$file" | $Xsed -e 's%/[^/]*$%%'`/"
- test "X$dir" = "X$file/" && dir=
- dir="$dir$objdir"
-
- # See the names of the shared library.
- set dummy $library_names
- if test -n "$2"; then
- realname="$2"
- shift
- shift
-
- # Install the shared library and build the symlinks.
- $show "$install_prog $dir/$realname $destdir/$realname"
- $run eval "$install_prog $dir/$realname $destdir/$realname" || exit $?
- test "X$dlname" = "X$realname" && dlname=
-
- if test $# -gt 0; then
- # Delete the old symlinks.
- rmcmd="$rm"
- for linkname
- do
- rmcmd="$rmcmd $destdir/$linkname"
- done
- $show "$rmcmd"
- $run $rmcmd
-
- # ... and create new ones.
- for linkname
- do
- test "X$dlname" = "X$linkname" && dlname=
- $show "(cd $destdir && $LN_S $realname $linkname)"
- $run eval "(cd $destdir && $LN_S $realname $linkname)"
- done
- fi
-
- if test -n "$dlname"; then
- # Install the dynamically-loadable library.
- $show "$install_prog $dir/$dlname $destdir/$dlname"
- $run eval "$install_prog $dir/$dlname $destdir/$dlname" || exit $?
- fi
-
- # Do each command in the postinstall commands.
- lib="$destdir/$realname"
- eval cmds=\"$postinstall_cmds\"
- IFS="${IFS= }"; save_ifs="$IFS"; IFS=';'
- for cmd in $cmds; do
- IFS="$save_ifs"
- $show "$cmd"
- $run eval "$cmd" || exit $?
- done
- IFS="$save_ifs"
- fi
-
- # Install the pseudo-library for information purposes.
- name=`$echo "X$file" | $Xsed -e 's%^.*/%%'`
- $show "$install_prog $file $destdir/$name"
- $run eval "$install_prog $file $destdir/$name" || exit $?
-
- # Maybe install the static library, too.
- test -n "$old_library" && staticlibs="$staticlibs $dir/$old_library"
- ;;
-
- *.lo)
- # Install (i.e. copy) a libtool object.
-
- # Figure out destination file name, if it wasn't already specified.
- if test -n "$destname"; then
- destfile="$destdir/$destname"
- else
- destfile=`$echo "X$file" | $Xsed -e 's%^.*/%%'`
- destfile="$destdir/$destfile"
- fi
-
- # Deduce the name of the destination old-style object file.
- case "$destfile" in
- *.lo)
- staticdest=`$echo "X$destfile" | $Xsed -e 's/\.lo$/\.o/'`
- ;;
- *.o)
- staticdest="$destfile"
- destfile=
- ;;
- *)
- $echo "$modename: cannot copy a libtool object to \`$destfile'" 1>&2
- $echo "$help" 1>&2
- exit 1
- ;;
- esac
-
- # Install the libtool object if requested.
- if test -n "$destfile"; then
- $show "$install_prog $file $destfile"
- $run eval "$install_prog $file $destfile" || exit $?
- fi
-
- # Install the old object if enabled.
- if test "$build_old_libs" = yes; then
- # Deduce the name of the old-style object file.
- staticobj=`$echo "X$file" | $Xsed -e 's/\.lo$/\.o/'`
-
- $show "$install_prog $staticobj $staticdest"
- $run eval "$install_prog \$staticobj \$staticdest" || exit $?
- fi
- exit 0
- ;;
-
- *)
- # Do a test to see if this is really a libtool program.
- if (sed -e '4q' $file | egrep '^# Generated by ltmain\.sh') >/dev/null 2>&1; then
- link_against_libtool_libs=
- finalize_command=
-
- # If there is no directory component, then add one.
- case "$file" in
- */* | *\\*) . $file ;;
- *) . ./$file ;;
- esac
-
- # Check the variables that should have been set.
- if test -z "$link_against_libtool_libs" || test -z "$finalize_command"; then
- $echo "$modename: invalid libtool wrapper script \`$file'" 1>&2
- exit 1
- fi
-
- finalize=yes
- for lib in $link_against_libtool_libs; do
- # Check to see that each library is installed.
- libdir=
- if test -f "$lib"; then
- # If there is no directory component, then add one.
- case "$lib" in
- */* | *\\*) . $lib ;;
- *) . ./$lib ;;
- esac
- fi
- libfile="$libdir/`$echo "X$lib" | $Xsed -e 's%^.*/%%g'`"
- if test -z "$libdir"; then
- $echo "$modename: warning: \`$lib' contains no -rpath information" 1>&2
- elif test -f "$libfile"; then :
- else
- $echo "$modename: warning: \`$lib' has not been installed in \`$libdir'" 1>&2
- finalize=no
- fi
- done
-
- if test "$hardcode_action" = relink; then
- if test "$finalize" = yes; then
- $echo "$modename: warning: relinking \`$file' on behalf of your buggy system linker" 1>&2
- $show "$finalize_command"
- if $run eval "$finalize_command"; then :
- else
- $echo "$modename: error: relink \`$file' with the above command before installing it" 1>&2
- continue
- fi
- file="$objdir/$file"T
- else
- $echo "$modename: warning: cannot relink \`$file' on behalf of your buggy system linker" 1>&2
- fi
- else
- # Install the binary that we compiled earlier.
- file=`$echo "X$file" | $Xsed -e "s%\([^/]*\)$%$objdir/\1%"`
- fi
- fi
-
- $show "$install_prog$stripme $file $dest"
- $run eval "$install_prog\$stripme \$file \$dest" || exit $?
- ;;
- esac
- done
-
- for file in $staticlibs; do
- name=`$echo "X$file" | $Xsed -e 's%^.*/%%'`
-
- # Set up the ranlib parameters.
- oldlib="$destdir/$name"
-
- $show "$install_prog $file $oldlib"
- $run eval "$install_prog \$file \$oldlib" || exit $?
-
- # Do each command in the postinstall commands.
- eval cmds=\"$old_postinstall_cmds\"
- IFS="${IFS= }"; save_ifs="$IFS"; IFS=';'
- for cmd in $cmds; do
- IFS="$save_ifs"
- $show "$cmd"
- $run eval "$cmd" || exit $?
- done
- IFS="$save_ifs"
- done
-
- if test -n "$future_libdirs"; then
- $echo "$modename: warning: remember to run \`$progname --finish$future_libdirs'" 1>&2
- fi
-
- if test -n "$current_libdirs"; then
- # Maybe just do a dry run.
- test -n "$run" && current_libdirs=" -n$current_libdirs"
- exec $SHELL $0 --finish$current_libdirs
- exit 1
- fi
-
- exit 0
- ;;
-
- # libtool finish mode
- finish)
- modename="$modename: finish"
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+++ /dev/null
-; Project file for Independent JPEG Group's software
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-; Thanks to Frank Moehle (Frank.Moehle@arbi.informatik.uni-oldenburg.de),
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+++ /dev/null
-; Project file for Independent JPEG Group's software
-;
-; This project file is for Atari ST/STE/TT systems using Pure C or Turbo C.
-; Thanks to Frank Moehle (Frank.Moehle@arbi.informatik.uni-oldenburg.de),
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-
+++ /dev/null
-# Makefile for Independent JPEG Group's software
-
-# This makefile is suitable for Unix-like systems with ANSI-capable compilers.
-# If you have a non-ANSI compiler, makefile.unix is a better starting point.
-
-# Read installation instructions before saying "make" !!
-
-# The name of your C compiler:
-CC= cc
-
-# You may need to adjust these cc options:
-CFLAGS= -O
-# Generally, we recommend defining any configuration symbols in jconfig.h,
-# NOT via -D switches here.
-
-# Link-time cc options:
-LDFLAGS=
-
-# To link any special libraries, add the necessary -l commands here.
-LDLIBS=
-
-# Put here the object file name for the correct system-dependent memory
-# manager file. For Unix this is usually jmemnobs.o, but you may want
-# to use jmemansi.o or jmemname.o if you have limited swap space.
-SYSDEPMEM= jmemnobs.o
-
-# miscellaneous OS-dependent stuff
-# linker
-LN= $(CC)
-# file deletion command
-RM= rm -f
-# library (.a) file creation command
-AR= ar rc
-# second step in .a creation (use "touch" if not needed)
-AR2= ranlib
-
-# End of configurable options.
-
-
-# source files: JPEG library proper
-LIBSOURCES= jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c \
- jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c \
- jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c \
- jdatadst.c jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c \
- jdinput.c jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c \
- jdpostct.c jdsample.c jdtrans.c jerror.c jfdctflt.c jfdctfst.c \
- jfdctint.c jidctflt.c jidctfst.c jidctint.c jidctred.c jquant1.c \
- jquant2.c jutils.c jmemmgr.c
-# memmgr back ends: compile only one of these into a working library
-SYSDEPSOURCES= jmemansi.c jmemname.c jmemnobs.c jmemdos.c jmemmac.c
-# source files: cjpeg/djpeg/jpegtran applications, also rdjpgcom/wrjpgcom
-APPSOURCES= cjpeg.c djpeg.c jpegtran.c rdjpgcom.c wrjpgcom.c cdjpeg.c \
- rdcolmap.c rdswitch.c transupp.c rdppm.c wrppm.c rdgif.c wrgif.c \
- rdtarga.c wrtarga.c rdbmp.c wrbmp.c rdrle.c wrrle.c
-SOURCES= $(LIBSOURCES) $(SYSDEPSOURCES) $(APPSOURCES)
-# files included by source files
-INCLUDES= jchuff.h jdhuff.h jdct.h jerror.h jinclude.h jmemsys.h jmorecfg.h \
- jpegint.h jpeglib.h jversion.h cdjpeg.h cderror.h transupp.h
-# documentation, test, and support files
-DOCS= README install.doc usage.doc cjpeg.1 djpeg.1 jpegtran.1 rdjpgcom.1 \
- wrjpgcom.1 wizard.doc example.c libjpeg.doc structure.doc \
- coderules.doc filelist.doc change.log
-MKFILES= configure makefile.cfg makefile.ansi makefile.unix makefile.bcc \
- makefile.mc6 makefile.dj makefile.wat makefile.vc makelib.ds \
- makeapps.ds makeproj.mac makcjpeg.st makdjpeg.st makljpeg.st \
- maktjpeg.st makefile.manx makefile.sas makefile.mms makefile.vms \
- makvms.opt
-CONFIGFILES= jconfig.cfg jconfig.bcc jconfig.mc6 jconfig.dj jconfig.wat \
- jconfig.vc jconfig.mac jconfig.st jconfig.manx jconfig.sas \
- jconfig.vms
-CONFIGUREFILES= config.guess config.sub install-sh ltconfig ltmain.sh
-OTHERFILES= jconfig.doc ckconfig.c ansi2knr.c ansi2knr.1 jmemdosa.asm
-TESTFILES= testorig.jpg testimg.ppm testimg.bmp testimg.jpg testprog.jpg \
- testimgp.jpg
-DISTFILES= $(DOCS) $(MKFILES) $(CONFIGFILES) $(SOURCES) $(INCLUDES) \
- $(CONFIGUREFILES) $(OTHERFILES) $(TESTFILES)
-# library object files common to compression and decompression
-COMOBJECTS= jcomapi.o jutils.o jerror.o jmemmgr.o $(SYSDEPMEM)
-# compression library object files
-CLIBOBJECTS= jcapimin.o jcapistd.o jctrans.o jcparam.o jdatadst.o jcinit.o \
- jcmaster.o jcmarker.o jcmainct.o jcprepct.o jccoefct.o jccolor.o \
- jcsample.o jchuff.o jcphuff.o jcdctmgr.o jfdctfst.o jfdctflt.o \
- jfdctint.o
-# decompression library object files
-DLIBOBJECTS= jdapimin.o jdapistd.o jdtrans.o jdatasrc.o jdmaster.o \
- jdinput.o jdmarker.o jdhuff.o jdphuff.o jdmainct.o jdcoefct.o \
- jdpostct.o jddctmgr.o jidctfst.o jidctflt.o jidctint.o jidctred.o \
- jdsample.o jdcolor.o jquant1.o jquant2.o jdmerge.o
-# These objectfiles are included in libjpeg.a
-LIBOBJECTS= $(CLIBOBJECTS) $(DLIBOBJECTS) $(COMOBJECTS)
-# object files for sample applications (excluding library files)
-COBJECTS= cjpeg.o rdppm.o rdgif.o rdtarga.o rdrle.o rdbmp.o rdswitch.o \
- cdjpeg.o
-DOBJECTS= djpeg.o wrppm.o wrgif.o wrtarga.o wrrle.o wrbmp.o rdcolmap.o \
- cdjpeg.o
-TROBJECTS= jpegtran.o rdswitch.o cdjpeg.o transupp.o
-
-
-all: libjpeg.a cjpeg djpeg jpegtran rdjpgcom wrjpgcom
-
-libjpeg.a: $(LIBOBJECTS)
- $(RM) libjpeg.a
- $(AR) libjpeg.a $(LIBOBJECTS)
- $(AR2) libjpeg.a
-
-cjpeg: $(COBJECTS) libjpeg.a
- $(LN) $(LDFLAGS) -o cjpeg $(COBJECTS) libjpeg.a $(LDLIBS)
-
-djpeg: $(DOBJECTS) libjpeg.a
- $(LN) $(LDFLAGS) -o djpeg $(DOBJECTS) libjpeg.a $(LDLIBS)
-
-jpegtran: $(TROBJECTS) libjpeg.a
- $(LN) $(LDFLAGS) -o jpegtran $(TROBJECTS) libjpeg.a $(LDLIBS)
-
-rdjpgcom: rdjpgcom.o
- $(LN) $(LDFLAGS) -o rdjpgcom rdjpgcom.o $(LDLIBS)
-
-wrjpgcom: wrjpgcom.o
- $(LN) $(LDFLAGS) -o wrjpgcom wrjpgcom.o $(LDLIBS)
-
-jconfig.h: jconfig.doc
- echo You must prepare a system-dependent jconfig.h file.
- echo Please read the installation directions in install.doc.
- exit 1
-
-clean:
- $(RM) *.o cjpeg djpeg jpegtran libjpeg.a rdjpgcom wrjpgcom
- $(RM) core testout*
-
-test: cjpeg djpeg jpegtran
- $(RM) testout*
- ./djpeg -dct int -ppm -outfile testout.ppm testorig.jpg
- ./djpeg -dct int -bmp -colors 256 -outfile testout.bmp testorig.jpg
- ./cjpeg -dct int -outfile testout.jpg testimg.ppm
- ./djpeg -dct int -ppm -outfile testoutp.ppm testprog.jpg
- ./cjpeg -dct int -progressive -opt -outfile testoutp.jpg testimg.ppm
- ./jpegtran -outfile testoutt.jpg testprog.jpg
- cmp testimg.ppm testout.ppm
- cmp testimg.bmp testout.bmp
- cmp testimg.jpg testout.jpg
- cmp testimg.ppm testoutp.ppm
- cmp testimgp.jpg testoutp.jpg
- cmp testorig.jpg testoutt.jpg
-
-
-jcapimin.o: jcapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcapistd.o: jcapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccoefct.o: jccoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccolor.o: jccolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcdctmgr.o: jcdctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jchuff.o: jchuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcinit.o: jcinit.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmainct.o: jcmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmarker.o: jcmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmaster.o: jcmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcomapi.o: jcomapi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcparam.o: jcparam.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcphuff.o: jcphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcprepct.o: jcprepct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcsample.o: jcsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jctrans.o: jctrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapimin.o: jdapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapistd.o: jdapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdatadst.o: jdatadst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdatasrc.o: jdatasrc.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdcoefct.o: jdcoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdcolor.o: jdcolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jddctmgr.o: jddctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jdhuff.o: jdhuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdinput.o: jdinput.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmainct.o: jdmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmarker.o: jdmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmaster.o: jdmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmerge.o: jdmerge.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdphuff.o: jdphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdpostct.o: jdpostct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdsample.o: jdsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdtrans.o: jdtrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jerror.o: jerror.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jversion.h jerror.h
-jfdctflt.o: jfdctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctfst.o: jfdctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctint.o: jfdctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctflt.o: jidctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctfst.o: jidctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctint.o: jidctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctred.o: jidctred.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jquant1.o: jquant1.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jquant2.o: jquant2.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jutils.o: jutils.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jmemmgr.o: jmemmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemansi.o: jmemansi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemname.o: jmemname.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemnobs.o: jmemnobs.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemdos.o: jmemdos.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemmac.o: jmemmac.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-cjpeg.o: cjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-djpeg.o: djpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-jpegtran.o: jpegtran.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h transupp.h jversion.h
-rdjpgcom.o: rdjpgcom.c jinclude.h jconfig.h
-wrjpgcom.o: wrjpgcom.c jinclude.h jconfig.h
-cdjpeg.o: cdjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdcolmap.o: rdcolmap.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdswitch.o: rdswitch.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-transupp.o: transupp.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h transupp.h
-rdppm.o: rdppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrppm.o: wrppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdgif.o: rdgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrgif.o: wrgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdtarga.o: rdtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrtarga.o: wrtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdbmp.o: rdbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrbmp.o: wrbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdrle.o: rdrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrrle.o: wrrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+++ /dev/null
-# Makefile for Independent JPEG Group's software
-
-# This makefile is suitable for Borland C on MS-DOS or OS/2.
-# It works with Borland C++ for DOS, revision 3.0 or later,
-# and has been tested with Borland C++ for OS/2.
-# Watch out for optimization bugs in the OS/2 compilers --- see notes below!
-# Thanks to Tom Wright and Ge' Weijers (original DOS) and
-# Ken Porter (OS/2) for this file.
-
-# Read installation instructions before saying "make" !!
-
-# Are we under DOS or OS/2?
-!if !$d(DOS) && !$d(OS2)
-!if $d(__OS2__)
-OS2=1
-!else
-DOS=1
-!endif
-!endif
-
-# The name of your C compiler:
-CC= bcc
-
-# You may need to adjust these cc options:
-!if $d(DOS)
-CFLAGS= -O2 -mm -w-par -w-stu -w-ccc -w-rch
-!else
-CFLAGS= -O1 -w-par -w-stu -w-ccc -w-rch
-!endif
-# -O2 enables full code optimization (for pre-3.0 Borland C++, use -O -G -Z).
-# -O2 is buggy in Borland OS/2 C++ revision 2.0, so use -O1 there for now.
-# If you have Borland OS/2 C++ revision 1.0, use -O or no optimization at all.
-# -mm selects medium memory model (near data, far code pointers; DOS only!)
-# -w-par suppresses warnings about unused function parameters
-# -w-stu suppresses warnings about incomplete structures
-# -w-ccc suppresses warnings about compile-time-constant conditions
-# -w-rch suppresses warnings about unreachable code
-# Generally, we recommend defining any configuration symbols in jconfig.h,
-# NOT via -D switches here.
-
-# Link-time cc options:
-!if $d(DOS)
-LDFLAGS= -mm
-# memory model option here must match CFLAGS!
-!else
-LDFLAGS=
-# -lai full-screen app
-# -lc case-significant link
-!endif
-
-# Put here the object file name for the correct system-dependent memory
-# manager file.
-# For DOS, we recommend jmemdos.c and jmemdosa.asm.
-# For OS/2, we recommend jmemnobs.c (flat memory!)
-# SYSDEPMEMLIB must list the same files with "+" signs for the librarian.
-!if $d(DOS)
-SYSDEPMEM= jmemdos.obj jmemdosa.obj
-SYSDEPMEMLIB= +jmemdos.obj +jmemdosa.obj
-!else
-SYSDEPMEM= jmemnobs.obj
-SYSDEPMEMLIB= +jmemnobs.obj
-!endif
-
-# End of configurable options.
-
-
-# source files: JPEG library proper
-LIBSOURCES= jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c \
- jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c \
- jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c \
- jdatadst.c jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c \
- jdinput.c jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c \
- jdpostct.c jdsample.c jdtrans.c jerror.c jfdctflt.c jfdctfst.c \
- jfdctint.c jidctflt.c jidctfst.c jidctint.c jidctred.c jquant1.c \
- jquant2.c jutils.c jmemmgr.c
-# memmgr back ends: compile only one of these into a working library
-SYSDEPSOURCES= jmemansi.c jmemname.c jmemnobs.c jmemdos.c jmemmac.c
-# source files: cjpeg/djpeg/jpegtran applications, also rdjpgcom/wrjpgcom
-APPSOURCES= cjpeg.c djpeg.c jpegtran.c rdjpgcom.c wrjpgcom.c cdjpeg.c \
- rdcolmap.c rdswitch.c transupp.c rdppm.c wrppm.c rdgif.c wrgif.c \
- rdtarga.c wrtarga.c rdbmp.c wrbmp.c rdrle.c wrrle.c
-SOURCES= $(LIBSOURCES) $(SYSDEPSOURCES) $(APPSOURCES)
-# files included by source files
-INCLUDES= jchuff.h jdhuff.h jdct.h jerror.h jinclude.h jmemsys.h jmorecfg.h \
- jpegint.h jpeglib.h jversion.h cdjpeg.h cderror.h transupp.h
-# documentation, test, and support files
-DOCS= README install.doc usage.doc cjpeg.1 djpeg.1 jpegtran.1 rdjpgcom.1 \
- wrjpgcom.1 wizard.doc example.c libjpeg.doc structure.doc \
- coderules.doc filelist.doc change.log
-MKFILES= configure makefile.cfg makefile.ansi makefile.unix makefile.bcc \
- makefile.mc6 makefile.dj makefile.wat makefile.vc makelib.ds \
- makeapps.ds makeproj.mac makcjpeg.st makdjpeg.st makljpeg.st \
- maktjpeg.st makefile.manx makefile.sas makefile.mms makefile.vms \
- makvms.opt
-CONFIGFILES= jconfig.cfg jconfig.bcc jconfig.mc6 jconfig.dj jconfig.wat \
- jconfig.vc jconfig.mac jconfig.st jconfig.manx jconfig.sas \
- jconfig.vms
-CONFIGUREFILES= config.guess config.sub install-sh ltconfig ltmain.sh
-OTHERFILES= jconfig.doc ckconfig.c ansi2knr.c ansi2knr.1 jmemdosa.asm
-TESTFILES= testorig.jpg testimg.ppm testimg.bmp testimg.jpg testprog.jpg \
- testimgp.jpg
-DISTFILES= $(DOCS) $(MKFILES) $(CONFIGFILES) $(SOURCES) $(INCLUDES) \
- $(CONFIGUREFILES) $(OTHERFILES) $(TESTFILES)
-# library object files common to compression and decompression
-COMOBJECTS= jcomapi.obj jutils.obj jerror.obj jmemmgr.obj $(SYSDEPMEM)
-# compression library object files
-CLIBOBJECTS= jcapimin.obj jcapistd.obj jctrans.obj jcparam.obj jdatadst.obj \
- jcinit.obj jcmaster.obj jcmarker.obj jcmainct.obj jcprepct.obj \
- jccoefct.obj jccolor.obj jcsample.obj jchuff.obj jcphuff.obj \
- jcdctmgr.obj jfdctfst.obj jfdctflt.obj jfdctint.obj
-# decompression library object files
-DLIBOBJECTS= jdapimin.obj jdapistd.obj jdtrans.obj jdatasrc.obj \
- jdmaster.obj jdinput.obj jdmarker.obj jdhuff.obj jdphuff.obj \
- jdmainct.obj jdcoefct.obj jdpostct.obj jddctmgr.obj jidctfst.obj \
- jidctflt.obj jidctint.obj jidctred.obj jdsample.obj jdcolor.obj \
- jquant1.obj jquant2.obj jdmerge.obj
-# These objectfiles are included in libjpeg.lib
-LIBOBJECTS= $(CLIBOBJECTS) $(DLIBOBJECTS) $(COMOBJECTS)
-# object files for sample applications (excluding library files)
-COBJECTS= cjpeg.obj rdppm.obj rdgif.obj rdtarga.obj rdrle.obj rdbmp.obj \
- rdswitch.obj cdjpeg.obj
-DOBJECTS= djpeg.obj wrppm.obj wrgif.obj wrtarga.obj wrrle.obj wrbmp.obj \
- rdcolmap.obj cdjpeg.obj
-TROBJECTS= jpegtran.obj rdswitch.obj cdjpeg.obj transupp.obj
-
-
-all: libjpeg.lib cjpeg.exe djpeg.exe jpegtran.exe rdjpgcom.exe wrjpgcom.exe
-
-libjpeg.lib: $(LIBOBJECTS)
- - del libjpeg.lib
- tlib libjpeg.lib /E /C @&&|
-+jcapimin.obj +jcapistd.obj +jctrans.obj +jcparam.obj +jdatadst.obj &
-+jcinit.obj +jcmaster.obj +jcmarker.obj +jcmainct.obj +jcprepct.obj &
-+jccoefct.obj +jccolor.obj +jcsample.obj +jchuff.obj +jcphuff.obj &
-+jcdctmgr.obj +jfdctfst.obj +jfdctflt.obj +jfdctint.obj +jdapimin.obj &
-+jdapistd.obj +jdtrans.obj +jdatasrc.obj +jdmaster.obj +jdinput.obj &
-+jdmarker.obj +jdhuff.obj +jdphuff.obj +jdmainct.obj +jdcoefct.obj &
-+jdpostct.obj +jddctmgr.obj +jidctfst.obj +jidctflt.obj +jidctint.obj &
-+jidctred.obj +jdsample.obj +jdcolor.obj +jquant1.obj +jquant2.obj &
-+jdmerge.obj +jcomapi.obj +jutils.obj +jerror.obj +jmemmgr.obj &
-$(SYSDEPMEMLIB)
-|
-
-cjpeg.exe: $(COBJECTS) libjpeg.lib
- $(CC) $(LDFLAGS) -ecjpeg.exe $(COBJECTS) libjpeg.lib
-
-djpeg.exe: $(DOBJECTS) libjpeg.lib
- $(CC) $(LDFLAGS) -edjpeg.exe $(DOBJECTS) libjpeg.lib
-
-jpegtran.exe: $(TROBJECTS) libjpeg.lib
- $(CC) $(LDFLAGS) -ejpegtran.exe $(TROBJECTS) libjpeg.lib
-
-rdjpgcom.exe: rdjpgcom.c
-!if $d(DOS)
- $(CC) -ms -O rdjpgcom.c
-!else
- $(CC) $(CFLAGS) rdjpgcom.c
-!endif
-
-# On DOS, wrjpgcom needs large model so it can malloc a 64K chunk
-wrjpgcom.exe: wrjpgcom.c
-!if $d(DOS)
- $(CC) -ml -O wrjpgcom.c
-!else
- $(CC) $(CFLAGS) wrjpgcom.c
-!endif
-
-# This "{}" syntax allows Borland Make to "batch" source files.
-# In this way, each run of the compiler can build many modules.
-.c.obj:
- $(CC) $(CFLAGS) -c{ $<}
-
-jconfig.h: jconfig.doc
- echo You must prepare a system-dependent jconfig.h file.
- echo Please read the installation directions in install.doc.
- exit 1
-
-clean:
- - del *.obj
- - del libjpeg.lib
- - del cjpeg.exe
- - del djpeg.exe
- - del jpegtran.exe
- - del rdjpgcom.exe
- - del wrjpgcom.exe
- - del testout*.*
-
-test: cjpeg.exe djpeg.exe jpegtran.exe
- - del testout*.*
- djpeg -dct int -ppm -outfile testout.ppm testorig.jpg
- djpeg -dct int -bmp -colors 256 -outfile testout.bmp testorig.jpg
- cjpeg -dct int -outfile testout.jpg testimg.ppm
- djpeg -dct int -ppm -outfile testoutp.ppm testprog.jpg
- cjpeg -dct int -progressive -opt -outfile testoutp.jpg testimg.ppm
- jpegtran -outfile testoutt.jpg testprog.jpg
-!if $d(DOS)
- fc /b testimg.ppm testout.ppm
- fc /b testimg.bmp testout.bmp
- fc /b testimg.jpg testout.jpg
- fc /b testimg.ppm testoutp.ppm
- fc /b testimgp.jpg testoutp.jpg
- fc /b testorig.jpg testoutt.jpg
-!else
- echo n > n.tmp
- comp testimg.ppm testout.ppm < n.tmp
- comp testimg.bmp testout.bmp < n.tmp
- comp testimg.jpg testout.jpg < n.tmp
- comp testimg.ppm testoutp.ppm < n.tmp
- comp testimgp.jpg testoutp.jpg < n.tmp
- comp testorig.jpg testoutt.jpg < n.tmp
- del n.tmp
-!endif
-
-
-jcapimin.obj: jcapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcapistd.obj: jcapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccoefct.obj: jccoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccolor.obj: jccolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcdctmgr.obj: jcdctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jchuff.obj: jchuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcinit.obj: jcinit.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmainct.obj: jcmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmarker.obj: jcmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmaster.obj: jcmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcomapi.obj: jcomapi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcparam.obj: jcparam.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcphuff.obj: jcphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcprepct.obj: jcprepct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcsample.obj: jcsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jctrans.obj: jctrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapimin.obj: jdapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapistd.obj: jdapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdatadst.obj: jdatadst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdatasrc.obj: jdatasrc.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdcoefct.obj: jdcoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdcolor.obj: jdcolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jddctmgr.obj: jddctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jdhuff.obj: jdhuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdinput.obj: jdinput.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmainct.obj: jdmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmarker.obj: jdmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmaster.obj: jdmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmerge.obj: jdmerge.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdphuff.obj: jdphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdpostct.obj: jdpostct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdsample.obj: jdsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdtrans.obj: jdtrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jerror.obj: jerror.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jversion.h jerror.h
-jfdctflt.obj: jfdctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctfst.obj: jfdctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctint.obj: jfdctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctflt.obj: jidctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctfst.obj: jidctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctint.obj: jidctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctred.obj: jidctred.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jquant1.obj: jquant1.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jquant2.obj: jquant2.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jutils.obj: jutils.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jmemmgr.obj: jmemmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemansi.obj: jmemansi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemname.obj: jmemname.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemnobs.obj: jmemnobs.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemdos.obj: jmemdos.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemmac.obj: jmemmac.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-cjpeg.obj: cjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-djpeg.obj: djpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-jpegtran.obj: jpegtran.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h transupp.h jversion.h
-rdjpgcom.obj: rdjpgcom.c jinclude.h jconfig.h
-wrjpgcom.obj: wrjpgcom.c jinclude.h jconfig.h
-cdjpeg.obj: cdjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdcolmap.obj: rdcolmap.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdswitch.obj: rdswitch.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-transupp.obj: transupp.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h transupp.h
-rdppm.obj: rdppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrppm.obj: wrppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdgif.obj: rdgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrgif.obj: wrgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdtarga.obj: rdtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrtarga.obj: wrtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdbmp.obj: rdbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrbmp.obj: wrbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdrle.obj: rdrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrrle.obj: wrrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-jmemdosa.obj: jmemdosa.asm
- tasm /mx jmemdosa.asm
TROBJECTS= jpegtran.$(O) rdswitch.$(O) cdjpeg.$(O) transupp.$(O)
-all: @A2K_DEPS@ libjpeg.$(A) cjpeg djpeg jpegtran rdjpgcom wrjpgcom
+all: @A2K_DEPS@ libjpeg.$(A)
# Special compilation rules to support ansi2knr and libtool.
.SUFFIXES: .lo .la
+++ /dev/null
-# Makefile for Independent JPEG Group's software
-
-# This makefile is for DJGPP (Delorie's GNU C port on MS-DOS), v2.0 or later.
-# Thanks to Frank J. Donahoe for this version.
-
-# Read installation instructions before saying "make" !!
-
-# The name of your C compiler:
-CC= gcc
-
-# You may need to adjust these cc options:
-CFLAGS= -O2 -Wall -I.
-# Generally, we recommend defining any configuration symbols in jconfig.h,
-# NOT via -D switches here.
-
-# Link-time cc options:
-LDFLAGS= -s
-
-# To link any special libraries, add the necessary -l commands here.
-LDLIBS=
-
-# Put here the object file name for the correct system-dependent memory
-# manager file. For DJGPP this is usually jmemnobs.o, but you could
-# use jmemname.o if you want to use named temp files instead of swap space.
-SYSDEPMEM= jmemnobs.o
-
-# miscellaneous OS-dependent stuff
-# linker
-LN= $(CC)
-# file deletion command
-RM= del
-# library (.a) file creation command
-AR= ar rc
-# second step in .a creation (use "touch" if not needed)
-AR2= ranlib
-
-# End of configurable options.
-
-
-# source files: JPEG library proper
-LIBSOURCES= jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c \
- jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c \
- jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c \
- jdatadst.c jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c \
- jdinput.c jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c \
- jdpostct.c jdsample.c jdtrans.c jerror.c jfdctflt.c jfdctfst.c \
- jfdctint.c jidctflt.c jidctfst.c jidctint.c jidctred.c jquant1.c \
- jquant2.c jutils.c jmemmgr.c
-# memmgr back ends: compile only one of these into a working library
-SYSDEPSOURCES= jmemansi.c jmemname.c jmemnobs.c jmemdos.c jmemmac.c
-# source files: cjpeg/djpeg/jpegtran applications, also rdjpgcom/wrjpgcom
-APPSOURCES= cjpeg.c djpeg.c jpegtran.c rdjpgcom.c wrjpgcom.c cdjpeg.c \
- rdcolmap.c rdswitch.c transupp.c rdppm.c wrppm.c rdgif.c wrgif.c \
- rdtarga.c wrtarga.c rdbmp.c wrbmp.c rdrle.c wrrle.c
-SOURCES= $(LIBSOURCES) $(SYSDEPSOURCES) $(APPSOURCES)
-# files included by source files
-INCLUDES= jchuff.h jdhuff.h jdct.h jerror.h jinclude.h jmemsys.h jmorecfg.h \
- jpegint.h jpeglib.h jversion.h cdjpeg.h cderror.h transupp.h
-# documentation, test, and support files
-DOCS= README install.doc usage.doc cjpeg.1 djpeg.1 jpegtran.1 rdjpgcom.1 \
- wrjpgcom.1 wizard.doc example.c libjpeg.doc structure.doc \
- coderules.doc filelist.doc change.log
-MKFILES= configure makefile.cfg makefile.ansi makefile.unix makefile.bcc \
- makefile.mc6 makefile.dj makefile.wat makefile.vc makelib.ds \
- makeapps.ds makeproj.mac makcjpeg.st makdjpeg.st makljpeg.st \
- maktjpeg.st makefile.manx makefile.sas makefile.mms makefile.vms \
- makvms.opt
-CONFIGFILES= jconfig.cfg jconfig.bcc jconfig.mc6 jconfig.dj jconfig.wat \
- jconfig.vc jconfig.mac jconfig.st jconfig.manx jconfig.sas \
- jconfig.vms
-CONFIGUREFILES= config.guess config.sub install-sh ltconfig ltmain.sh
-OTHERFILES= jconfig.doc ckconfig.c ansi2knr.c ansi2knr.1 jmemdosa.asm
-TESTFILES= testorig.jpg testimg.ppm testimg.bmp testimg.jpg testprog.jpg \
- testimgp.jpg
-DISTFILES= $(DOCS) $(MKFILES) $(CONFIGFILES) $(SOURCES) $(INCLUDES) \
- $(CONFIGUREFILES) $(OTHERFILES) $(TESTFILES)
-# library object files common to compression and decompression
-COMOBJECTS= jcomapi.o jutils.o jerror.o jmemmgr.o $(SYSDEPMEM)
-# compression library object files
-CLIBOBJECTS= jcapimin.o jcapistd.o jctrans.o jcparam.o jdatadst.o jcinit.o \
- jcmaster.o jcmarker.o jcmainct.o jcprepct.o jccoefct.o jccolor.o \
- jcsample.o jchuff.o jcphuff.o jcdctmgr.o jfdctfst.o jfdctflt.o \
- jfdctint.o
-# decompression library object files
-DLIBOBJECTS= jdapimin.o jdapistd.o jdtrans.o jdatasrc.o jdmaster.o \
- jdinput.o jdmarker.o jdhuff.o jdphuff.o jdmainct.o jdcoefct.o \
- jdpostct.o jddctmgr.o jidctfst.o jidctflt.o jidctint.o jidctred.o \
- jdsample.o jdcolor.o jquant1.o jquant2.o jdmerge.o
-# These objectfiles are included in libjpeg.a
-LIBOBJECTS= $(CLIBOBJECTS) $(DLIBOBJECTS) $(COMOBJECTS)
-# object files for sample applications (excluding library files)
-COBJECTS= cjpeg.o rdppm.o rdgif.o rdtarga.o rdrle.o rdbmp.o rdswitch.o \
- cdjpeg.o
-DOBJECTS= djpeg.o wrppm.o wrgif.o wrtarga.o wrrle.o wrbmp.o rdcolmap.o \
- cdjpeg.o
-TROBJECTS= jpegtran.o rdswitch.o cdjpeg.o transupp.o
-
-
-all: libjpeg.a cjpeg.exe djpeg.exe jpegtran.exe rdjpgcom.exe wrjpgcom.exe
-
-libjpeg.a: $(LIBOBJECTS)
- $(RM) libjpeg.a
- $(AR) libjpeg.a $(LIBOBJECTS)
- $(AR2) libjpeg.a
-
-cjpeg.exe: $(COBJECTS) libjpeg.a
- $(LN) $(LDFLAGS) -o cjpeg.exe $(COBJECTS) libjpeg.a $(LDLIBS)
-
-djpeg.exe: $(DOBJECTS) libjpeg.a
- $(LN) $(LDFLAGS) -o djpeg.exe $(DOBJECTS) libjpeg.a $(LDLIBS)
-
-jpegtran.exe: $(TROBJECTS) libjpeg.a
- $(LN) $(LDFLAGS) -o jpegtran.exe $(TROBJECTS) libjpeg.a $(LDLIBS)
-
-rdjpgcom.exe: rdjpgcom.o
- $(LN) $(LDFLAGS) -o rdjpgcom.exe rdjpgcom.o $(LDLIBS)
-
-wrjpgcom.exe: wrjpgcom.o
- $(LN) $(LDFLAGS) -o wrjpgcom.exe wrjpgcom.o $(LDLIBS)
-
-jconfig.h: jconfig.doc
- echo You must prepare a system-dependent jconfig.h file.
- echo Please read the installation directions in install.doc.
- exit 1
-
-clean:
- $(RM) *.o
- $(RM) cjpeg.exe
- $(RM) djpeg.exe
- $(RM) jpegtran.exe
- $(RM) rdjpgcom.exe
- $(RM) wrjpgcom.exe
- $(RM) libjpeg.a
- $(RM) testout*.*
-
-test: cjpeg.exe djpeg.exe jpegtran.exe
- $(RM) testout*.*
- ./djpeg -dct int -ppm -outfile testout.ppm testorig.jpg
- ./djpeg -dct int -bmp -colors 256 -outfile testout.bmp testorig.jpg
- ./cjpeg -dct int -outfile testout.jpg testimg.ppm
- ./djpeg -dct int -ppm -outfile testoutp.ppm testprog.jpg
- ./cjpeg -dct int -progressive -opt -outfile testoutp.jpg testimg.ppm
- ./jpegtran -outfile testoutt.jpg testprog.jpg
- fc /b testimg.ppm testout.ppm
- fc /b testimg.bmp testout.bmp
- fc /b testimg.jpg testout.jpg
- fc /b testimg.ppm testoutp.ppm
- fc /b testimgp.jpg testoutp.jpg
- fc /b testorig.jpg testoutt.jpg
-
-
-jcapimin.o: jcapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcapistd.o: jcapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccoefct.o: jccoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccolor.o: jccolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcdctmgr.o: jcdctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jchuff.o: jchuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcinit.o: jcinit.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmainct.o: jcmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmarker.o: jcmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmaster.o: jcmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcomapi.o: jcomapi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcparam.o: jcparam.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcphuff.o: jcphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcprepct.o: jcprepct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcsample.o: jcsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jctrans.o: jctrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapimin.o: jdapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapistd.o: jdapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdatadst.o: jdatadst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdatasrc.o: jdatasrc.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdcoefct.o: jdcoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdcolor.o: jdcolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jddctmgr.o: jddctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jdhuff.o: jdhuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdinput.o: jdinput.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmainct.o: jdmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmarker.o: jdmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmaster.o: jdmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmerge.o: jdmerge.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdphuff.o: jdphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdpostct.o: jdpostct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdsample.o: jdsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdtrans.o: jdtrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jerror.o: jerror.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jversion.h jerror.h
-jfdctflt.o: jfdctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctfst.o: jfdctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctint.o: jfdctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctflt.o: jidctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctfst.o: jidctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctint.o: jidctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctred.o: jidctred.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jquant1.o: jquant1.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jquant2.o: jquant2.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jutils.o: jutils.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jmemmgr.o: jmemmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemansi.o: jmemansi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemname.o: jmemname.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemnobs.o: jmemnobs.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemdos.o: jmemdos.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemmac.o: jmemmac.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-cjpeg.o: cjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-djpeg.o: djpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-jpegtran.o: jpegtran.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h transupp.h jversion.h
-rdjpgcom.o: rdjpgcom.c jinclude.h jconfig.h
-wrjpgcom.o: wrjpgcom.c jinclude.h jconfig.h
-cdjpeg.o: cdjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdcolmap.o: rdcolmap.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdswitch.o: rdswitch.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-transupp.o: transupp.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h transupp.h
-rdppm.o: rdppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrppm.o: wrppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdgif.o: rdgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrgif.o: wrgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdtarga.o: rdtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrtarga.o: wrtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdbmp.o: rdbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrbmp.o: wrbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdrle.o: rdrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrrle.o: wrrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+++ /dev/null
-# Makefile for Independent JPEG Group's software
-
-# This makefile is for Amiga systems using Manx Aztec C ver 5.x.
-# Thanks to D.J. James (djjames@cup.portal.com) for this version.
-
-# Read installation instructions before saying "make" !!
-
-# The name of your C compiler:
-CC= cc
-
-# You may need to adjust these cc options:
-# Uncomment for generic 68000 code (will work on any Amiga)
-ARCHFLAGS= -sn
-
-# Uncomment for 68020/68030 code (faster, but won't run on 68000 CPU)
-#ARCHFLAGS= -c2
-
-CFLAGS= -MC -MD $(ARCHFLAGS) -spfam -r4
-
-# Link-time cc options:
-LDFLAGS= -g
-
-# To link any special libraries, add the necessary -l commands here.
-LDLIBS= -lml -lcl
-
-# Put here the object file name for the correct system-dependent memory
-# manager file. For Amiga we recommend jmemname.o.
-SYSDEPMEM= jmemname.o
-
-# miscellaneous OS-dependent stuff
-# linker
-LN= ln
-# file deletion command
-RM= delete quiet
-# library (.lib) file creation command
-AR= lb
-
-# End of configurable options.
-
-
-# source files: JPEG library proper
-LIBSOURCES= jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c \
- jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c \
- jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c \
- jdatadst.c jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c \
- jdinput.c jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c \
- jdpostct.c jdsample.c jdtrans.c jerror.c jfdctflt.c jfdctfst.c \
- jfdctint.c jidctflt.c jidctfst.c jidctint.c jidctred.c jquant1.c \
- jquant2.c jutils.c jmemmgr.c
-# memmgr back ends: compile only one of these into a working library
-SYSDEPSOURCES= jmemansi.c jmemname.c jmemnobs.c jmemdos.c jmemmac.c
-# source files: cjpeg/djpeg/jpegtran applications, also rdjpgcom/wrjpgcom
-APPSOURCES= cjpeg.c djpeg.c jpegtran.c rdjpgcom.c wrjpgcom.c cdjpeg.c \
- rdcolmap.c rdswitch.c transupp.c rdppm.c wrppm.c rdgif.c wrgif.c \
- rdtarga.c wrtarga.c rdbmp.c wrbmp.c rdrle.c wrrle.c
-SOURCES= $(LIBSOURCES) $(SYSDEPSOURCES) $(APPSOURCES)
-# files included by source files
-INCLUDES= jchuff.h jdhuff.h jdct.h jerror.h jinclude.h jmemsys.h jmorecfg.h \
- jpegint.h jpeglib.h jversion.h cdjpeg.h cderror.h transupp.h
-# documentation, test, and support files
-DOCS= README install.doc usage.doc cjpeg.1 djpeg.1 jpegtran.1 rdjpgcom.1 \
- wrjpgcom.1 wizard.doc example.c libjpeg.doc structure.doc \
- coderules.doc filelist.doc change.log
-MKFILES= configure makefile.cfg makefile.ansi makefile.unix makefile.bcc \
- makefile.mc6 makefile.dj makefile.wat makefile.vc makelib.ds \
- makeapps.ds makeproj.mac makcjpeg.st makdjpeg.st makljpeg.st \
- maktjpeg.st makefile.manx makefile.sas makefile.mms makefile.vms \
- makvms.opt
-CONFIGFILES= jconfig.cfg jconfig.bcc jconfig.mc6 jconfig.dj jconfig.wat \
- jconfig.vc jconfig.mac jconfig.st jconfig.manx jconfig.sas \
- jconfig.vms
-CONFIGUREFILES= config.guess config.sub install-sh ltconfig ltmain.sh
-OTHERFILES= jconfig.doc ckconfig.c ansi2knr.c ansi2knr.1 jmemdosa.asm
-TESTFILES= testorig.jpg testimg.ppm testimg.bmp testimg.jpg testprog.jpg \
- testimgp.jpg
-DISTFILES= $(DOCS) $(MKFILES) $(CONFIGFILES) $(SOURCES) $(INCLUDES) \
- $(CONFIGUREFILES) $(OTHERFILES) $(TESTFILES)
-# library object files common to compression and decompression
-COMOBJECTS= jcomapi.o jutils.o jerror.o jmemmgr.o $(SYSDEPMEM)
-# compression library object files
-CLIBOBJECTS= jcapimin.o jcapistd.o jctrans.o jcparam.o jdatadst.o jcinit.o \
- jcmaster.o jcmarker.o jcmainct.o jcprepct.o jccoefct.o jccolor.o \
- jcsample.o jchuff.o jcphuff.o jcdctmgr.o jfdctfst.o jfdctflt.o \
- jfdctint.o
-# decompression library object files
-DLIBOBJECTS= jdapimin.o jdapistd.o jdtrans.o jdatasrc.o jdmaster.o \
- jdinput.o jdmarker.o jdhuff.o jdphuff.o jdmainct.o jdcoefct.o \
- jdpostct.o jddctmgr.o jidctfst.o jidctflt.o jidctint.o jidctred.o \
- jdsample.o jdcolor.o jquant1.o jquant2.o jdmerge.o
-# These objectfiles are included in libjpeg.lib
-LIBOBJECTS= $(CLIBOBJECTS) $(DLIBOBJECTS) $(COMOBJECTS)
-# object files for sample applications (excluding library files)
-COBJECTS= cjpeg.o rdppm.o rdgif.o rdtarga.o rdrle.o rdbmp.o rdswitch.o \
- cdjpeg.o
-DOBJECTS= djpeg.o wrppm.o wrgif.o wrtarga.o wrrle.o wrbmp.o rdcolmap.o \
- cdjpeg.o
-TROBJECTS= jpegtran.o rdswitch.o cdjpeg.o transupp.o
-
-
-all: libjpeg.lib cjpeg djpeg jpegtran rdjpgcom wrjpgcom
-
-libjpeg.lib: $(LIBOBJECTS)
- -$(RM) libjpeg.lib
- $(AR) libjpeg.lib $(LIBOBJECTS)
-
-cjpeg: $(COBJECTS) libjpeg.lib
- $(LN) $(LDFLAGS) -o cjpeg $(COBJECTS) libjpeg.lib $(LDLIBS)
-
-djpeg: $(DOBJECTS) libjpeg.lib
- $(LN) $(LDFLAGS) -o djpeg $(DOBJECTS) libjpeg.lib $(LDLIBS)
-
-jpegtran: $(TROBJECTS) libjpeg.lib
- $(LN) $(LDFLAGS) -o jpegtran $(TROBJECTS) libjpeg.lib $(LDLIBS)
-
-rdjpgcom: rdjpgcom.o
- $(LN) $(LDFLAGS) -o rdjpgcom rdjpgcom.o $(LDLIBS)
-
-wrjpgcom: wrjpgcom.o
- $(LN) $(LDFLAGS) -o wrjpgcom wrjpgcom.o $(LDLIBS)
-
-jconfig.h: jconfig.doc
- echo You must prepare a system-dependent jconfig.h file.
- echo Please read the installation directions in install.doc.
- exit 1
-
-clean:
- -$(RM) *.o cjpeg djpeg jpegtran libjpeg.lib rdjpgcom wrjpgcom
- -$(RM) core testout*.*
-
-test: cjpeg djpeg jpegtran
- -$(RM) testout*.*
- djpeg -dct int -ppm -outfile testout.ppm testorig.jpg
- djpeg -dct int -bmp -colors 256 -outfile testout.bmp testorig.jpg
- cjpeg -dct int -outfile testout.jpg testimg.ppm
- djpeg -dct int -ppm -outfile testoutp.ppm testprog.jpg
- cjpeg -dct int -progressive -opt -outfile testoutp.jpg testimg.ppm
- jpegtran -outfile testoutt.jpg testprog.jpg
- cmp testimg.ppm testout.ppm
- cmp testimg.bmp testout.bmp
- cmp testimg.jpg testout.jpg
- cmp testimg.ppm testoutp.ppm
- cmp testimgp.jpg testoutp.jpg
- cmp testorig.jpg testoutt.jpg
-
-
-jcapimin.o: jcapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcapistd.o: jcapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccoefct.o: jccoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccolor.o: jccolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcdctmgr.o: jcdctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jchuff.o: jchuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcinit.o: jcinit.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmainct.o: jcmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmarker.o: jcmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmaster.o: jcmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcomapi.o: jcomapi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcparam.o: jcparam.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcphuff.o: jcphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcprepct.o: jcprepct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcsample.o: jcsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jctrans.o: jctrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapimin.o: jdapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapistd.o: jdapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdatadst.o: jdatadst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdatasrc.o: jdatasrc.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdcoefct.o: jdcoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdcolor.o: jdcolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jddctmgr.o: jddctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jdhuff.o: jdhuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdinput.o: jdinput.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmainct.o: jdmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmarker.o: jdmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmaster.o: jdmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmerge.o: jdmerge.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdphuff.o: jdphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdpostct.o: jdpostct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdsample.o: jdsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdtrans.o: jdtrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jerror.o: jerror.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jversion.h jerror.h
-jfdctflt.o: jfdctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctfst.o: jfdctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctint.o: jfdctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctflt.o: jidctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctfst.o: jidctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctint.o: jidctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctred.o: jidctred.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jquant1.o: jquant1.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jquant2.o: jquant2.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jutils.o: jutils.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jmemmgr.o: jmemmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemansi.o: jmemansi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemname.o: jmemname.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemnobs.o: jmemnobs.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemdos.o: jmemdos.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemmac.o: jmemmac.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-cjpeg.o: cjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-djpeg.o: djpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-jpegtran.o: jpegtran.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h transupp.h jversion.h
-rdjpgcom.o: rdjpgcom.c jinclude.h jconfig.h
-wrjpgcom.o: wrjpgcom.c jinclude.h jconfig.h
-cdjpeg.o: cdjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdcolmap.o: rdcolmap.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdswitch.o: rdswitch.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-transupp.o: transupp.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h transupp.h
-rdppm.o: rdppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrppm.o: wrppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdgif.o: rdgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrgif.o: wrgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdtarga.o: rdtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrtarga.o: wrtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdbmp.o: rdbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrbmp.o: wrbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdrle.o: rdrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrrle.o: wrrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+++ /dev/null
-# Makefile for Independent JPEG Group's software
-
-# This makefile is for Microsoft C for MS-DOS, version 6.00A and up.
-# Use NMAKE, not Microsoft's brain-damaged MAKE.
-# Thanks to Alan Wright and Chris Turner of Olivetti Research Ltd.
-
-# Read installation instructions before saying "nmake" !!
-
-# You may need to adjust these compiler options:
-CFLAGS = -AM -Oecigt -Gs -W3
-# -AM medium memory model (or use -AS for small model, if you remove features)
-# -Oecigt -Gs maximum safe optimisation (-Ol has bugs in MSC 6.00A)
-# -W3 warning level 3
-# You might also want to add -G2 if you have an 80286, etc.
-# Generally, we recommend defining any configuration symbols in jconfig.h,
-# NOT via -D switches here.
-
-# Jan-Herman Buining suggests the following switches for MS C 8.0 and a 486:
-# CFLAGS = /AM /f- /FPi87 /G3 /Gs /Gy /Ob1 /Oc /Oe /Og /Oi /Ol /On /Oo /Ot \
-# /OV4 /W3
-# except for jquant1.c, which must be compiled with /Oo- to avoid a compiler
-# crash.
-
-# Ingar Steinsland suggests the following switches when building
-# a 16-bit Windows DLL:
-# CFLAGS = -ALw -Gsw -Zpe -W3 -O2 -Zi -Zd
-
-# Put here the object file name for the correct system-dependent memory
-# manager file. For DOS, we recommend jmemdos.c and jmemdosa.asm.
-# (But not for Windows; see install.doc if you use this makefile for Windows.)
-SYSDEPMEM= jmemdos.obj jmemdosa.obj
-# SYSDEPMEMLIB must list the same files with "+" signs for the librarian.
-SYSDEPMEMLIB= +jmemdos.obj +jmemdosa.obj
-
-# End of configurable options.
-
-
-# source files: JPEG library proper
-LIBSOURCES= jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c \
- jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c \
- jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c \
- jdatadst.c jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c \
- jdinput.c jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c \
- jdpostct.c jdsample.c jdtrans.c jerror.c jfdctflt.c jfdctfst.c \
- jfdctint.c jidctflt.c jidctfst.c jidctint.c jidctred.c jquant1.c \
- jquant2.c jutils.c jmemmgr.c
-# memmgr back ends: compile only one of these into a working library
-SYSDEPSOURCES= jmemansi.c jmemname.c jmemnobs.c jmemdos.c jmemmac.c
-# source files: cjpeg/djpeg/jpegtran applications, also rdjpgcom/wrjpgcom
-APPSOURCES= cjpeg.c djpeg.c jpegtran.c rdjpgcom.c wrjpgcom.c cdjpeg.c \
- rdcolmap.c rdswitch.c transupp.c rdppm.c wrppm.c rdgif.c wrgif.c \
- rdtarga.c wrtarga.c rdbmp.c wrbmp.c rdrle.c wrrle.c
-SOURCES= $(LIBSOURCES) $(SYSDEPSOURCES) $(APPSOURCES)
-# files included by source files
-INCLUDES= jchuff.h jdhuff.h jdct.h jerror.h jinclude.h jmemsys.h jmorecfg.h \
- jpegint.h jpeglib.h jversion.h cdjpeg.h cderror.h transupp.h
-# documentation, test, and support files
-DOCS= README install.doc usage.doc cjpeg.1 djpeg.1 jpegtran.1 rdjpgcom.1 \
- wrjpgcom.1 wizard.doc example.c libjpeg.doc structure.doc \
- coderules.doc filelist.doc change.log
-MKFILES= configure makefile.cfg makefile.ansi makefile.unix makefile.bcc \
- makefile.mc6 makefile.dj makefile.wat makefile.vc makelib.ds \
- makeapps.ds makeproj.mac makcjpeg.st makdjpeg.st makljpeg.st \
- maktjpeg.st makefile.manx makefile.sas makefile.mms makefile.vms \
- makvms.opt
-CONFIGFILES= jconfig.cfg jconfig.bcc jconfig.mc6 jconfig.dj jconfig.wat \
- jconfig.vc jconfig.mac jconfig.st jconfig.manx jconfig.sas \
- jconfig.vms
-CONFIGUREFILES= config.guess config.sub install-sh ltconfig ltmain.sh
-OTHERFILES= jconfig.doc ckconfig.c ansi2knr.c ansi2knr.1 jmemdosa.asm
-TESTFILES= testorig.jpg testimg.ppm testimg.bmp testimg.jpg testprog.jpg \
- testimgp.jpg
-DISTFILES= $(DOCS) $(MKFILES) $(CONFIGFILES) $(SOURCES) $(INCLUDES) \
- $(CONFIGUREFILES) $(OTHERFILES) $(TESTFILES)
-# library object files common to compression and decompression
-COMOBJECTS= jcomapi.obj jutils.obj jerror.obj jmemmgr.obj $(SYSDEPMEM)
-# compression library object files
-CLIBOBJECTS= jcapimin.obj jcapistd.obj jctrans.obj jcparam.obj jdatadst.obj \
- jcinit.obj jcmaster.obj jcmarker.obj jcmainct.obj jcprepct.obj \
- jccoefct.obj jccolor.obj jcsample.obj jchuff.obj jcphuff.obj \
- jcdctmgr.obj jfdctfst.obj jfdctflt.obj jfdctint.obj
-# decompression library object files
-DLIBOBJECTS= jdapimin.obj jdapistd.obj jdtrans.obj jdatasrc.obj \
- jdmaster.obj jdinput.obj jdmarker.obj jdhuff.obj jdphuff.obj \
- jdmainct.obj jdcoefct.obj jdpostct.obj jddctmgr.obj jidctfst.obj \
- jidctflt.obj jidctint.obj jidctred.obj jdsample.obj jdcolor.obj \
- jquant1.obj jquant2.obj jdmerge.obj
-# These objectfiles are included in libjpeg.lib
-LIBOBJECTS= $(CLIBOBJECTS) $(DLIBOBJECTS) $(COMOBJECTS)
-# object files for sample applications (excluding library files)
-COBJECTS= cjpeg.obj rdppm.obj rdgif.obj rdtarga.obj rdrle.obj rdbmp.obj \
- rdswitch.obj cdjpeg.obj
-DOBJECTS= djpeg.obj wrppm.obj wrgif.obj wrtarga.obj wrrle.obj wrbmp.obj \
- rdcolmap.obj cdjpeg.obj
-TROBJECTS= jpegtran.obj rdswitch.obj cdjpeg.obj transupp.obj
-
-# need linker response file because file list > 128 chars
-RFILE = libjpeg.ans
-
-
-all: libjpeg.lib cjpeg.exe djpeg.exe jpegtran.exe rdjpgcom.exe wrjpgcom.exe
-
-libjpeg.lib: $(LIBOBJECTS) $(RFILE)
- del libjpeg.lib
- lib @$(RFILE)
-
-# linker response file for building libjpeg.lib
-$(RFILE) : makefile
- del $(RFILE)
- echo libjpeg.lib >$(RFILE)
-# silly want-to-create-it prompt:
- echo y >>$(RFILE)
- echo +jcapimin.obj +jcapistd.obj +jctrans.obj +jcparam.obj & >>$(RFILE)
- echo +jdatadst.obj +jcinit.obj +jcmaster.obj +jcmarker.obj & >>$(RFILE)
- echo +jcmainct.obj +jcprepct.obj +jccoefct.obj & >>$(RFILE)
- echo +jccolor.obj +jcsample.obj +jchuff.obj +jcphuff.obj & >>$(RFILE)
- echo +jcdctmgr.obj +jfdctfst.obj +jfdctflt.obj & >>$(RFILE)
- echo +jfdctint.obj +jdapimin.obj +jdapistd.obj & >>$(RFILE)
- echo +jdtrans.obj +jdatasrc.obj +jdmaster.obj +jdinput.obj & >>$(RFILE)
- echo +jdmarker.obj +jdhuff.obj +jdphuff.obj +jdmainct.obj & >>$(RFILE)
- echo +jdcoefct.obj +jdpostct.obj +jddctmgr.obj & >>$(RFILE)
- echo +jidctfst.obj +jidctflt.obj +jidctint.obj & >>$(RFILE)
- echo +jidctred.obj +jdsample.obj +jdcolor.obj +jquant1.obj & >>$(RFILE)
- echo +jquant2.obj +jdmerge.obj +jcomapi.obj +jutils.obj & >>$(RFILE)
- echo +jerror.obj +jmemmgr.obj & >>$(RFILE)
- echo $(SYSDEPMEMLIB) ; >>$(RFILE)
-
-cjpeg.exe: $(COBJECTS) libjpeg.lib
- echo $(COBJECTS) >cjpeg.lst
- link /STACK:4096 /EXEPACK @cjpeg.lst, cjpeg.exe, , libjpeg.lib, ;
- del cjpeg.lst
-
-djpeg.exe: $(DOBJECTS) libjpeg.lib
- echo $(DOBJECTS) >djpeg.lst
- link /STACK:4096 /EXEPACK @djpeg.lst, djpeg.exe, , libjpeg.lib, ;
- del djpeg.lst
-
-jpegtran.exe: $(TROBJECTS) libjpeg.lib
- link /STACK:4096 /EXEPACK $(TROBJECTS), jpegtran.exe, , libjpeg.lib, ;
-
-rdjpgcom.exe: rdjpgcom.c
- $(CC) -AS -O -W3 rdjpgcom.c
-
-# wrjpgcom needs large model so it can malloc a 64K chunk
-wrjpgcom.exe: wrjpgcom.c
- $(CC) -AL -O -W3 wrjpgcom.c
-
-jconfig.h: jconfig.doc
- echo You must prepare a system-dependent jconfig.h file.
- echo Please read the installation directions in install.doc.
- exit 1
-
-clean:
- del *.obj
- del libjpeg.lib
- del cjpeg.exe
- del djpeg.exe
- del jpegtran.exe
- del rdjpgcom.exe
- del wrjpgcom.exe
- del testout*.*
-
-test: cjpeg.exe djpeg.exe jpegtran.exe
- del testout*.*
- djpeg -dct int -ppm -outfile testout.ppm testorig.jpg
- djpeg -dct int -bmp -colors 256 -outfile testout.bmp testorig.jpg
- cjpeg -dct int -outfile testout.jpg testimg.ppm
- djpeg -dct int -ppm -outfile testoutp.ppm testprog.jpg
- cjpeg -dct int -progressive -opt -outfile testoutp.jpg testimg.ppm
- jpegtran -outfile testoutt.jpg testprog.jpg
- fc /b testimg.ppm testout.ppm
- fc /b testimg.bmp testout.bmp
- fc /b testimg.jpg testout.jpg
- fc /b testimg.ppm testoutp.ppm
- fc /b testimgp.jpg testoutp.jpg
- fc /b testorig.jpg testoutt.jpg
-
-
-jcapimin.obj: jcapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcapistd.obj: jcapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccoefct.obj: jccoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccolor.obj: jccolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcdctmgr.obj: jcdctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jchuff.obj: jchuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcinit.obj: jcinit.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmainct.obj: jcmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmarker.obj: jcmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmaster.obj: jcmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcomapi.obj: jcomapi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcparam.obj: jcparam.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcphuff.obj: jcphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcprepct.obj: jcprepct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcsample.obj: jcsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jctrans.obj: jctrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapimin.obj: jdapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapistd.obj: jdapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdatadst.obj: jdatadst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdatasrc.obj: jdatasrc.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdcoefct.obj: jdcoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdcolor.obj: jdcolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jddctmgr.obj: jddctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jdhuff.obj: jdhuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdinput.obj: jdinput.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmainct.obj: jdmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmarker.obj: jdmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmaster.obj: jdmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmerge.obj: jdmerge.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdphuff.obj: jdphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdpostct.obj: jdpostct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdsample.obj: jdsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdtrans.obj: jdtrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jerror.obj: jerror.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jversion.h jerror.h
-jfdctflt.obj: jfdctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctfst.obj: jfdctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctint.obj: jfdctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctflt.obj: jidctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctfst.obj: jidctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctint.obj: jidctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctred.obj: jidctred.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jquant1.obj: jquant1.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jquant2.obj: jquant2.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jutils.obj: jutils.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jmemmgr.obj: jmemmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemansi.obj: jmemansi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemname.obj: jmemname.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemnobs.obj: jmemnobs.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemdos.obj: jmemdos.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemmac.obj: jmemmac.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-cjpeg.obj: cjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-djpeg.obj: djpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-jpegtran.obj: jpegtran.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h transupp.h jversion.h
-rdjpgcom.obj: rdjpgcom.c jinclude.h jconfig.h
-wrjpgcom.obj: wrjpgcom.c jinclude.h jconfig.h
-cdjpeg.obj: cdjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdcolmap.obj: rdcolmap.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdswitch.obj: rdswitch.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-transupp.obj: transupp.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h transupp.h
-rdppm.obj: rdppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrppm.obj: wrppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdgif.obj: rdgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrgif.obj: wrgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdtarga.obj: rdtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrtarga.obj: wrtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdbmp.obj: rdbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrbmp.obj: wrbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdrle.obj: rdrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrrle.obj: wrrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-jmemdosa.obj : jmemdosa.asm
- masm /mx $*;
+++ /dev/null
-# Makefile for Independent JPEG Group's software
-
-# This makefile is for use with MMS on Digital VMS systems.
-# Thanks to Rick Dyson (dyson@iowasp.physics.uiowa.edu)
-# and Tim Bell (tbell@netcom.com) for their help.
-
-# Read installation instructions before saying "MMS" !!
-
-# You may need to adjust these cc options:
-CFLAGS= $(CFLAGS) /NoDebug /Optimize
-# Generally, we recommend defining any configuration symbols in jconfig.h,
-# NOT via /Define switches here.
-.ifdef ALPHA
-OPT=
-.else
-OPT= ,Sys$Disk:[]MAKVMS.OPT/Option
-.endif
-
-# Put here the object file name for the correct system-dependent memory
-# manager file. For Unix this is usually jmemnobs.o, but you may want
-# to use jmemansi.o or jmemname.o if you have limited swap space.
-SYSDEPMEM= jmemnobs.obj
-
-# End of configurable options.
-
-
-# source files: JPEG library proper
-LIBSOURCES= jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c \
- jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c \
- jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c \
- jdatadst.c jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c \
- jdinput.c jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c \
- jdpostct.c jdsample.c jdtrans.c jerror.c jfdctflt.c jfdctfst.c \
- jfdctint.c jidctflt.c jidctfst.c jidctint.c jidctred.c jquant1.c \
- jquant2.c jutils.c jmemmgr.c
-# memmgr back ends: compile only one of these into a working library
-SYSDEPSOURCES= jmemansi.c jmemname.c jmemnobs.c jmemdos.c jmemmac.c
-# source files: cjpeg/djpeg/jpegtran applications, also rdjpgcom/wrjpgcom
-APPSOURCES= cjpeg.c djpeg.c jpegtran.c rdjpgcom.c wrjpgcom.c cdjpeg.c \
- rdcolmap.c rdswitch.c transupp.c rdppm.c wrppm.c rdgif.c wrgif.c \
- rdtarga.c wrtarga.c rdbmp.c wrbmp.c rdrle.c wrrle.c
-SOURCES= $(LIBSOURCES) $(SYSDEPSOURCES) $(APPSOURCES)
-# files included by source files
-INCLUDES= jchuff.h jdhuff.h jdct.h jerror.h jinclude.h jmemsys.h jmorecfg.h \
- jpegint.h jpeglib.h jversion.h cdjpeg.h cderror.h transupp.h
-# documentation, test, and support files
-DOCS= README install.doc usage.doc cjpeg.1 djpeg.1 jpegtran.1 rdjpgcom.1 \
- wrjpgcom.1 wizard.doc example.c libjpeg.doc structure.doc \
- coderules.doc filelist.doc change.log
-MKFILES= configure makefile.cfg makefile.ansi makefile.unix makefile.bcc \
- makefile.mc6 makefile.dj makefile.wat makefile.vc makelib.ds \
- makeapps.ds makeproj.mac makcjpeg.st makdjpeg.st makljpeg.st \
- maktjpeg.st makefile.manx makefile.sas makefile.mms makefile.vms \
- makvms.opt
-CONFIGFILES= jconfig.cfg jconfig.bcc jconfig.mc6 jconfig.dj jconfig.wat \
- jconfig.vc jconfig.mac jconfig.st jconfig.manx jconfig.sas \
- jconfig.vms
-CONFIGUREFILES= config.guess config.sub install-sh ltconfig ltmain.sh
-OTHERFILES= jconfig.doc ckconfig.c ansi2knr.c ansi2knr.1 jmemdosa.asm
-TESTFILES= testorig.jpg testimg.ppm testimg.bmp testimg.jpg testprog.jpg \
- testimgp.jpg
-DISTFILES= $(DOCS) $(MKFILES) $(CONFIGFILES) $(SOURCES) $(INCLUDES) \
- $(CONFIGUREFILES) $(OTHERFILES) $(TESTFILES)
-# library object files common to compression and decompression
-COMOBJECTS= jcomapi.obj jutils.obj jerror.obj jmemmgr.obj $(SYSDEPMEM)
-# compression library object files
-CLIBOBJECTS= jcapimin.obj jcapistd.obj jctrans.obj jcparam.obj jdatadst.obj \
- jcinit.obj jcmaster.obj jcmarker.obj jcmainct.obj jcprepct.obj \
- jccoefct.obj jccolor.obj jcsample.obj jchuff.obj jcphuff.obj \
- jcdctmgr.obj jfdctfst.obj jfdctflt.obj jfdctint.obj
-# decompression library object files
-DLIBOBJECTS= jdapimin.obj jdapistd.obj jdtrans.obj jdatasrc.obj \
- jdmaster.obj jdinput.obj jdmarker.obj jdhuff.obj jdphuff.obj \
- jdmainct.obj jdcoefct.obj jdpostct.obj jddctmgr.obj jidctfst.obj \
- jidctflt.obj jidctint.obj jidctred.obj jdsample.obj jdcolor.obj \
- jquant1.obj jquant2.obj jdmerge.obj
-# These objectfiles are included in libjpeg.olb
-LIBOBJECTS= $(CLIBOBJECTS) $(DLIBOBJECTS) $(COMOBJECTS)
-# object files for sample applications (excluding library files)
-COBJECTS= cjpeg.obj rdppm.obj rdgif.obj rdtarga.obj rdrle.obj rdbmp.obj \
- rdswitch.obj cdjpeg.obj
-DOBJECTS= djpeg.obj wrppm.obj wrgif.obj wrtarga.obj wrrle.obj wrbmp.obj \
- rdcolmap.obj cdjpeg.obj
-TROBJECTS= jpegtran.obj rdswitch.obj cdjpeg.obj transupp.obj
-# objectfile lists with commas --- what a crock
-COBJLIST= cjpeg.obj,rdppm.obj,rdgif.obj,rdtarga.obj,rdrle.obj,rdbmp.obj,\
- rdswitch.obj,cdjpeg.obj
-DOBJLIST= djpeg.obj,wrppm.obj,wrgif.obj,wrtarga.obj,wrrle.obj,wrbmp.obj,\
- rdcolmap.obj,cdjpeg.obj
-TROBJLIST= jpegtran.obj,rdswitch.obj,cdjpeg.obj,transupp.obj
-LIBOBJLIST= jcapimin.obj,jcapistd.obj,jctrans.obj,jcparam.obj,jdatadst.obj,\
- jcinit.obj,jcmaster.obj,jcmarker.obj,jcmainct.obj,jcprepct.obj,\
- jccoefct.obj,jccolor.obj,jcsample.obj,jchuff.obj,jcphuff.obj,\
- jcdctmgr.obj,jfdctfst.obj,jfdctflt.obj,jfdctint.obj,jdapimin.obj,\
- jdapistd.obj,jdtrans.obj,jdatasrc.obj,jdmaster.obj,jdinput.obj,\
- jdmarker.obj,jdhuff.obj,jdphuff.obj,jdmainct.obj,jdcoefct.obj,\
- jdpostct.obj,jddctmgr.obj,jidctfst.obj,jidctflt.obj,jidctint.obj,\
- jidctred.obj,jdsample.obj,jdcolor.obj,jquant1.obj,jquant2.obj,\
- jdmerge.obj,jcomapi.obj,jutils.obj,jerror.obj,jmemmgr.obj,$(SYSDEPMEM)
-
-
-.first
- @- Define /NoLog Sys Sys$Library
-
-ALL : libjpeg.olb cjpeg.exe djpeg.exe jpegtran.exe rdjpgcom.exe wrjpgcom.exe
- @ Continue
-
-libjpeg.olb : $(LIBOBJECTS)
- Library /Create libjpeg.olb $(LIBOBJLIST)
-
-cjpeg.exe : $(COBJECTS) libjpeg.olb
- $(LINK) $(LFLAGS) /Executable = cjpeg.exe $(COBJLIST),libjpeg.olb/Library$(OPT)
-
-djpeg.exe : $(DOBJECTS) libjpeg.olb
- $(LINK) $(LFLAGS) /Executable = djpeg.exe $(DOBJLIST),libjpeg.olb/Library$(OPT)
-
-jpegtran.exe : $(TROBJECTS) libjpeg.olb
- $(LINK) $(LFLAGS) /Executable = jpegtran.exe $(TROBJLIST),libjpeg.olb/Library$(OPT)
-
-rdjpgcom.exe : rdjpgcom.obj
- $(LINK) $(LFLAGS) /Executable = rdjpgcom.exe rdjpgcom.obj$(OPT)
-
-wrjpgcom.exe : wrjpgcom.obj
- $(LINK) $(LFLAGS) /Executable = wrjpgcom.exe wrjpgcom.obj$(OPT)
-
-jconfig.h : jconfig.vms
- @- Copy jconfig.vms jconfig.h
-
-clean :
- @- Set Protection = Owner:RWED *.*;-1
- @- Set Protection = Owner:RWED *.OBJ
- - Purge /NoLog /NoConfirm *.*
- - Delete /NoLog /NoConfirm *.OBJ;
-
-test : cjpeg.exe djpeg.exe jpegtran.exe
- mcr sys$disk:[]djpeg -dct int -ppm -outfile testout.ppm testorig.jpg
- mcr sys$disk:[]djpeg -dct int -bmp -colors 256 -outfile testout.bmp testorig.jpg
- mcr sys$disk:[]cjpeg -dct int -outfile testout.jpg testimg.ppm
- mcr sys$disk:[]djpeg -dct int -ppm -outfile testoutp.ppm testprog.jpg
- mcr sys$disk:[]cjpeg -dct int -progressive -opt -outfile testoutp.jpg testimg.ppm
- mcr sys$disk:[]jpegtran -outfile testoutt.jpg testprog.jpg
- - Backup /Compare/Log testimg.ppm testout.ppm
- - Backup /Compare/Log testimg.bmp testout.bmp
- - Backup /Compare/Log testimg.jpg testout.jpg
- - Backup /Compare/Log testimg.ppm testoutp.ppm
- - Backup /Compare/Log testimgp.jpg testoutp.jpg
- - Backup /Compare/Log testorig.jpg testoutt.jpg
-
-
-jcapimin.obj : jcapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcapistd.obj : jcapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccoefct.obj : jccoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccolor.obj : jccolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcdctmgr.obj : jcdctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jchuff.obj : jchuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcinit.obj : jcinit.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmainct.obj : jcmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmarker.obj : jcmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmaster.obj : jcmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcomapi.obj : jcomapi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcparam.obj : jcparam.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcphuff.obj : jcphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcprepct.obj : jcprepct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcsample.obj : jcsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jctrans.obj : jctrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapimin.obj : jdapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapistd.obj : jdapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdatadst.obj : jdatadst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdatasrc.obj : jdatasrc.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdcoefct.obj : jdcoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdcolor.obj : jdcolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jddctmgr.obj : jddctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jdhuff.obj : jdhuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdinput.obj : jdinput.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmainct.obj : jdmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmarker.obj : jdmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmaster.obj : jdmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmerge.obj : jdmerge.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdphuff.obj : jdphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdpostct.obj : jdpostct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdsample.obj : jdsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdtrans.obj : jdtrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jerror.obj : jerror.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jversion.h jerror.h
-jfdctflt.obj : jfdctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctfst.obj : jfdctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctint.obj : jfdctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctflt.obj : jidctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctfst.obj : jidctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctint.obj : jidctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctred.obj : jidctred.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jquant1.obj : jquant1.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jquant2.obj : jquant2.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jutils.obj : jutils.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jmemmgr.obj : jmemmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemansi.obj : jmemansi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemname.obj : jmemname.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemnobs.obj : jmemnobs.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemdos.obj : jmemdos.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemmac.obj : jmemmac.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-cjpeg.obj : cjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-djpeg.obj : djpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-jpegtran.obj : jpegtran.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h transupp.h jversion.h
-rdjpgcom.obj : rdjpgcom.c jinclude.h jconfig.h
-wrjpgcom.obj : wrjpgcom.c jinclude.h jconfig.h
-cdjpeg.obj : cdjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdcolmap.obj : rdcolmap.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdswitch.obj : rdswitch.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-transupp.obj : transupp.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h transupp.h
-rdppm.obj : rdppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrppm.obj : wrppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdgif.obj : rdgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrgif.obj : wrgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdtarga.obj : rdtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrtarga.obj : wrtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdbmp.obj : rdbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrbmp.obj : wrbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdrle.obj : rdrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrrle.obj : wrrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+++ /dev/null
-# Makefile for Independent JPEG Group's software
-
-# This makefile is for Amiga systems using SAS C 6.0 and up.
-# Thanks to Ed Hanway, Mark Rinfret, and Jim Zepeda.
-
-# Read installation instructions before saying "make" !!
-
-# The name of your C compiler:
-CC= sc
-
-# You may need to adjust these cc options:
-# Uncomment the following lines for generic 680x0 version
-ARCHFLAGS= cpu=any
-SUFFIX=
-
-# Uncomment the following lines for 68030-only version
-#ARCHFLAGS= cpu=68030
-#SUFFIX=.030
-
-CFLAGS= nostackcheck data=near parms=register optimize $(ARCHFLAGS) \
- ignore=104 ignore=304 ignore=306
-# ignore=104 disables warnings for mismatched const qualifiers
-# ignore=304 disables warnings for variables being optimized out
-# ignore=306 disables warnings for the inlining of functions
-# Generally, we recommend defining any configuration symbols in jconfig.h,
-# NOT via define switches here.
-
-# Link-time cc options:
-LDFLAGS= SC SD ND BATCH
-
-# To link any special libraries, add the necessary commands here.
-LDLIBS= LIB:scm.lib LIB:sc.lib
-
-# Put here the object file name for the correct system-dependent memory
-# manager file. For Amiga we recommend jmemname.o.
-SYSDEPMEM= jmemname.o
-
-# miscellaneous OS-dependent stuff
-# linker
-LN= slink
-# file deletion command
-RM= delete quiet
-# library (.lib) file creation command
-AR= oml
-
-# End of configurable options.
-
-
-# source files: JPEG library proper
-LIBSOURCES= jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c \
- jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c \
- jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c \
- jdatadst.c jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c \
- jdinput.c jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c \
- jdpostct.c jdsample.c jdtrans.c jerror.c jfdctflt.c jfdctfst.c \
- jfdctint.c jidctflt.c jidctfst.c jidctint.c jidctred.c jquant1.c \
- jquant2.c jutils.c jmemmgr.c
-# memmgr back ends: compile only one of these into a working library
-SYSDEPSOURCES= jmemansi.c jmemname.c jmemnobs.c jmemdos.c jmemmac.c
-# source files: cjpeg/djpeg/jpegtran applications, also rdjpgcom/wrjpgcom
-APPSOURCES= cjpeg.c djpeg.c jpegtran.c rdjpgcom.c wrjpgcom.c cdjpeg.c \
- rdcolmap.c rdswitch.c transupp.c rdppm.c wrppm.c rdgif.c wrgif.c \
- rdtarga.c wrtarga.c rdbmp.c wrbmp.c rdrle.c wrrle.c
-SOURCES= $(LIBSOURCES) $(SYSDEPSOURCES) $(APPSOURCES)
-# files included by source files
-INCLUDES= jchuff.h jdhuff.h jdct.h jerror.h jinclude.h jmemsys.h jmorecfg.h \
- jpegint.h jpeglib.h jversion.h cdjpeg.h cderror.h transupp.h
-# documentation, test, and support files
-DOCS= README install.doc usage.doc cjpeg.1 djpeg.1 jpegtran.1 rdjpgcom.1 \
- wrjpgcom.1 wizard.doc example.c libjpeg.doc structure.doc \
- coderules.doc filelist.doc change.log
-MKFILES= configure makefile.cfg makefile.ansi makefile.unix makefile.bcc \
- makefile.mc6 makefile.dj makefile.wat makefile.vc makelib.ds \
- makeapps.ds makeproj.mac makcjpeg.st makdjpeg.st makljpeg.st \
- maktjpeg.st makefile.manx makefile.sas makefile.mms makefile.vms \
- makvms.opt
-CONFIGFILES= jconfig.cfg jconfig.bcc jconfig.mc6 jconfig.dj jconfig.wat \
- jconfig.vc jconfig.mac jconfig.st jconfig.manx jconfig.sas \
- jconfig.vms
-CONFIGUREFILES= config.guess config.sub install-sh ltconfig ltmain.sh
-OTHERFILES= jconfig.doc ckconfig.c ansi2knr.c ansi2knr.1 jmemdosa.asm
-TESTFILES= testorig.jpg testimg.ppm testimg.bmp testimg.jpg testprog.jpg \
- testimgp.jpg
-DISTFILES= $(DOCS) $(MKFILES) $(CONFIGFILES) $(SOURCES) $(INCLUDES) \
- $(CONFIGUREFILES) $(OTHERFILES) $(TESTFILES)
-# library object files common to compression and decompression
-COMOBJECTS= jcomapi.o jutils.o jerror.o jmemmgr.o $(SYSDEPMEM)
-# compression library object files
-CLIBOBJECTS= jcapimin.o jcapistd.o jctrans.o jcparam.o jdatadst.o jcinit.o \
- jcmaster.o jcmarker.o jcmainct.o jcprepct.o jccoefct.o jccolor.o \
- jcsample.o jchuff.o jcphuff.o jcdctmgr.o jfdctfst.o jfdctflt.o \
- jfdctint.o
-# decompression library object files
-DLIBOBJECTS= jdapimin.o jdapistd.o jdtrans.o jdatasrc.o jdmaster.o \
- jdinput.o jdmarker.o jdhuff.o jdphuff.o jdmainct.o jdcoefct.o \
- jdpostct.o jddctmgr.o jidctfst.o jidctflt.o jidctint.o jidctred.o \
- jdsample.o jdcolor.o jquant1.o jquant2.o jdmerge.o
-# These objectfiles are included in libjpeg.lib
-LIBOBJECTS= $(CLIBOBJECTS) $(DLIBOBJECTS) $(COMOBJECTS)
-# object files for sample applications (excluding library files)
-COBJECTS= cjpeg.o rdppm.o rdgif.o rdtarga.o rdrle.o rdbmp.o rdswitch.o \
- cdjpeg.o
-DOBJECTS= djpeg.o wrppm.o wrgif.o wrtarga.o wrrle.o wrbmp.o rdcolmap.o \
- cdjpeg.o
-TROBJECTS= jpegtran.o rdswitch.o cdjpeg.o transupp.o
-
-
-all: libjpeg.lib cjpeg$(SUFFIX) djpeg$(SUFFIX) jpegtran$(SUFFIX) rdjpgcom$(SUFFIX) wrjpgcom$(SUFFIX)
-
-# note: do several AR steps to avoid command line length limitations
-
-libjpeg.lib: $(LIBOBJECTS)
- -$(RM) libjpeg.lib
- $(AR) libjpeg.lib r $(CLIBOBJECTS)
- $(AR) libjpeg.lib r $(DLIBOBJECTS)
- $(AR) libjpeg.lib r $(COMOBJECTS)
-
-cjpeg$(SUFFIX): $(COBJECTS) libjpeg.lib
- $(LN) <WITH <
-$(LDFLAGS)
-TO cjpeg$(SUFFIX)
-FROM LIB:c.o $(COBJECTS)
-LIB libjpeg.lib $(LDLIBS)
-<
-
-djpeg$(SUFFIX): $(DOBJECTS) libjpeg.lib
- $(LN) <WITH <
-$(LDFLAGS)
-TO djpeg$(SUFFIX)
-FROM LIB:c.o $(DOBJECTS)
-LIB libjpeg.lib $(LDLIBS)
-<
-
-jpegtran$(SUFFIX): $(TROBJECTS) libjpeg.lib
- $(LN) <WITH <
-$(LDFLAGS)
-TO jpegtran$(SUFFIX)
-FROM LIB:c.o $(TROBJECTS)
-LIB libjpeg.lib $(LDLIBS)
-<
-
-rdjpgcom$(SUFFIX): rdjpgcom.o
- $(LN) <WITH <
-$(LDFLAGS)
-TO rdjpgcom$(SUFFIX)
-FROM LIB:c.o rdjpgcom.o
-LIB $(LDLIBS)
-<
-
-wrjpgcom$(SUFFIX): wrjpgcom.o
- $(LN) <WITH <
-$(LDFLAGS)
-TO wrjpgcom$(SUFFIX)
-FROM LIB:c.o wrjpgcom.o
-LIB $(LDLIBS)
-<
-
-jconfig.h: jconfig.doc
- echo You must prepare a system-dependent jconfig.h file.
- echo Please read the installation directions in install.doc.
- exit 1
-
-clean:
- -$(RM) *.o cjpeg djpeg jpegtran cjpeg.030 djpeg.030 jpegtran.030
- -$(RM) rdjpgcom wrjpgcom rdjpgcom.030 wrjpgcom.030
- -$(RM) libjpeg.lib core testout*.*
-
-test: cjpeg djpeg jpegtran
- -$(RM) testout*.*
- djpeg -dct int -ppm -outfile testout.ppm testorig.jpg
- djpeg -dct int -bmp -colors 256 -outfile testout.bmp testorig.jpg
- cjpeg -dct int -outfile testout.jpg testimg.ppm
- djpeg -dct int -ppm -outfile testoutp.ppm testprog.jpg
- cjpeg -dct int -progressive -opt -outfile testoutp.jpg testimg.ppm
- jpegtran -outfile testoutt.jpg testprog.jpg
- cmp testimg.ppm testout.ppm
- cmp testimg.bmp testout.bmp
- cmp testimg.jpg testout.jpg
- cmp testimg.ppm testoutp.ppm
- cmp testimgp.jpg testoutp.jpg
- cmp testorig.jpg testoutt.jpg
-
-
-jcapimin.o: jcapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcapistd.o: jcapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccoefct.o: jccoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccolor.o: jccolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcdctmgr.o: jcdctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jchuff.o: jchuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcinit.o: jcinit.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmainct.o: jcmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmarker.o: jcmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmaster.o: jcmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcomapi.o: jcomapi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcparam.o: jcparam.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcphuff.o: jcphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcprepct.o: jcprepct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcsample.o: jcsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jctrans.o: jctrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapimin.o: jdapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapistd.o: jdapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdatadst.o: jdatadst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdatasrc.o: jdatasrc.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdcoefct.o: jdcoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdcolor.o: jdcolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jddctmgr.o: jddctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jdhuff.o: jdhuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdinput.o: jdinput.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmainct.o: jdmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmarker.o: jdmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmaster.o: jdmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmerge.o: jdmerge.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdphuff.o: jdphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdpostct.o: jdpostct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdsample.o: jdsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdtrans.o: jdtrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jerror.o: jerror.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jversion.h jerror.h
-jfdctflt.o: jfdctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctfst.o: jfdctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctint.o: jfdctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctflt.o: jidctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctfst.o: jidctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctint.o: jidctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctred.o: jidctred.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jquant1.o: jquant1.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jquant2.o: jquant2.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jutils.o: jutils.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jmemmgr.o: jmemmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemansi.o: jmemansi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemname.o: jmemname.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemnobs.o: jmemnobs.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemdos.o: jmemdos.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemmac.o: jmemmac.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-cjpeg.o: cjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-djpeg.o: djpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-jpegtran.o: jpegtran.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h transupp.h jversion.h
-rdjpgcom.o: rdjpgcom.c jinclude.h jconfig.h
-wrjpgcom.o: wrjpgcom.c jinclude.h jconfig.h
-cdjpeg.o: cdjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdcolmap.o: rdcolmap.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdswitch.o: rdswitch.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-transupp.o: transupp.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h transupp.h
-rdppm.o: rdppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrppm.o: wrppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdgif.o: rdgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrgif.o: wrgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdtarga.o: rdtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrtarga.o: wrtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdbmp.o: rdbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrbmp.o: wrbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdrle.o: rdrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrrle.o: wrrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+++ /dev/null
-# Makefile for Independent JPEG Group's software
-
-# This makefile is suitable for Unix-like systems with non-ANSI compilers.
-# If you have an ANSI compiler, makefile.ansi is a better starting point.
-
-# Read installation instructions before saying "make" !!
-
-# The name of your C compiler:
-CC= cc
-
-# You may need to adjust these cc options:
-CFLAGS= -O
-# Generally, we recommend defining any configuration symbols in jconfig.h,
-# NOT via -D switches here.
-# However, any special defines for ansi2knr.c may be included here:
-ANSI2KNRFLAGS=
-
-# Link-time cc options:
-LDFLAGS=
-
-# To link any special libraries, add the necessary -l commands here.
-LDLIBS=
-
-# Put here the object file name for the correct system-dependent memory
-# manager file. For Unix this is usually jmemnobs.o, but you may want
-# to use jmemansi.o or jmemname.o if you have limited swap space.
-SYSDEPMEM= jmemnobs.o
-
-# miscellaneous OS-dependent stuff
-# linker
-LN= $(CC)
-# file deletion command
-RM= rm -f
-# file rename command
-MV= mv
-# library (.a) file creation command
-AR= ar rc
-# second step in .a creation (use "touch" if not needed)
-AR2= ranlib
-
-# End of configurable options.
-
-
-# source files: JPEG library proper
-LIBSOURCES= jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c \
- jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c \
- jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c \
- jdatadst.c jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c \
- jdinput.c jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c \
- jdpostct.c jdsample.c jdtrans.c jerror.c jfdctflt.c jfdctfst.c \
- jfdctint.c jidctflt.c jidctfst.c jidctint.c jidctred.c jquant1.c \
- jquant2.c jutils.c jmemmgr.c
-# memmgr back ends: compile only one of these into a working library
-SYSDEPSOURCES= jmemansi.c jmemname.c jmemnobs.c jmemdos.c jmemmac.c
-# source files: cjpeg/djpeg/jpegtran applications, also rdjpgcom/wrjpgcom
-APPSOURCES= cjpeg.c djpeg.c jpegtran.c rdjpgcom.c wrjpgcom.c cdjpeg.c \
- rdcolmap.c rdswitch.c transupp.c rdppm.c wrppm.c rdgif.c wrgif.c \
- rdtarga.c wrtarga.c rdbmp.c wrbmp.c rdrle.c wrrle.c
-SOURCES= $(LIBSOURCES) $(SYSDEPSOURCES) $(APPSOURCES)
-# files included by source files
-INCLUDES= jchuff.h jdhuff.h jdct.h jerror.h jinclude.h jmemsys.h jmorecfg.h \
- jpegint.h jpeglib.h jversion.h cdjpeg.h cderror.h transupp.h
-# documentation, test, and support files
-DOCS= README install.doc usage.doc cjpeg.1 djpeg.1 jpegtran.1 rdjpgcom.1 \
- wrjpgcom.1 wizard.doc example.c libjpeg.doc structure.doc \
- coderules.doc filelist.doc change.log
-MKFILES= configure makefile.cfg makefile.ansi makefile.unix makefile.bcc \
- makefile.mc6 makefile.dj makefile.wat makefile.vc makelib.ds \
- makeapps.ds makeproj.mac makcjpeg.st makdjpeg.st makljpeg.st \
- maktjpeg.st makefile.manx makefile.sas makefile.mms makefile.vms \
- makvms.opt
-CONFIGFILES= jconfig.cfg jconfig.bcc jconfig.mc6 jconfig.dj jconfig.wat \
- jconfig.vc jconfig.mac jconfig.st jconfig.manx jconfig.sas \
- jconfig.vms
-CONFIGUREFILES= config.guess config.sub install-sh ltconfig ltmain.sh
-OTHERFILES= jconfig.doc ckconfig.c ansi2knr.c ansi2knr.1 jmemdosa.asm
-TESTFILES= testorig.jpg testimg.ppm testimg.bmp testimg.jpg testprog.jpg \
- testimgp.jpg
-DISTFILES= $(DOCS) $(MKFILES) $(CONFIGFILES) $(SOURCES) $(INCLUDES) \
- $(CONFIGUREFILES) $(OTHERFILES) $(TESTFILES)
-# library object files common to compression and decompression
-COMOBJECTS= jcomapi.o jutils.o jerror.o jmemmgr.o $(SYSDEPMEM)
-# compression library object files
-CLIBOBJECTS= jcapimin.o jcapistd.o jctrans.o jcparam.o jdatadst.o jcinit.o \
- jcmaster.o jcmarker.o jcmainct.o jcprepct.o jccoefct.o jccolor.o \
- jcsample.o jchuff.o jcphuff.o jcdctmgr.o jfdctfst.o jfdctflt.o \
- jfdctint.o
-# decompression library object files
-DLIBOBJECTS= jdapimin.o jdapistd.o jdtrans.o jdatasrc.o jdmaster.o \
- jdinput.o jdmarker.o jdhuff.o jdphuff.o jdmainct.o jdcoefct.o \
- jdpostct.o jddctmgr.o jidctfst.o jidctflt.o jidctint.o jidctred.o \
- jdsample.o jdcolor.o jquant1.o jquant2.o jdmerge.o
-# These objectfiles are included in libjpeg.a
-LIBOBJECTS= $(CLIBOBJECTS) $(DLIBOBJECTS) $(COMOBJECTS)
-# object files for sample applications (excluding library files)
-COBJECTS= cjpeg.o rdppm.o rdgif.o rdtarga.o rdrle.o rdbmp.o rdswitch.o \
- cdjpeg.o
-DOBJECTS= djpeg.o wrppm.o wrgif.o wrtarga.o wrrle.o wrbmp.o rdcolmap.o \
- cdjpeg.o
-TROBJECTS= jpegtran.o rdswitch.o cdjpeg.o transupp.o
-
-
-all: ansi2knr libjpeg.a cjpeg djpeg jpegtran rdjpgcom wrjpgcom
-
-# This rule causes ansi2knr to be invoked.
-.c.o:
- ./ansi2knr $*.c T$*.c
- $(CC) $(CFLAGS) -c T$*.c
- $(RM) T$*.c $*.o
- $(MV) T$*.o $*.o
-
-ansi2knr: ansi2knr.c
- $(CC) $(CFLAGS) $(ANSI2KNRFLAGS) -o ansi2knr ansi2knr.c
-
-libjpeg.a: ansi2knr $(LIBOBJECTS)
- $(RM) libjpeg.a
- $(AR) libjpeg.a $(LIBOBJECTS)
- $(AR2) libjpeg.a
-
-cjpeg: ansi2knr $(COBJECTS) libjpeg.a
- $(LN) $(LDFLAGS) -o cjpeg $(COBJECTS) libjpeg.a $(LDLIBS)
-
-djpeg: ansi2knr $(DOBJECTS) libjpeg.a
- $(LN) $(LDFLAGS) -o djpeg $(DOBJECTS) libjpeg.a $(LDLIBS)
-
-jpegtran: ansi2knr $(TROBJECTS) libjpeg.a
- $(LN) $(LDFLAGS) -o jpegtran $(TROBJECTS) libjpeg.a $(LDLIBS)
-
-rdjpgcom: rdjpgcom.o
- $(LN) $(LDFLAGS) -o rdjpgcom rdjpgcom.o $(LDLIBS)
-
-wrjpgcom: wrjpgcom.o
- $(LN) $(LDFLAGS) -o wrjpgcom wrjpgcom.o $(LDLIBS)
-
-jconfig.h: jconfig.doc
- echo You must prepare a system-dependent jconfig.h file.
- echo Please read the installation directions in install.doc.
- exit 1
-
-clean:
- $(RM) *.o cjpeg djpeg jpegtran libjpeg.a rdjpgcom wrjpgcom
- $(RM) ansi2knr core testout*
-
-test: cjpeg djpeg jpegtran
- $(RM) testout*
- ./djpeg -dct int -ppm -outfile testout.ppm testorig.jpg
- ./djpeg -dct int -bmp -colors 256 -outfile testout.bmp testorig.jpg
- ./cjpeg -dct int -outfile testout.jpg testimg.ppm
- ./djpeg -dct int -ppm -outfile testoutp.ppm testprog.jpg
- ./cjpeg -dct int -progressive -opt -outfile testoutp.jpg testimg.ppm
- ./jpegtran -outfile testoutt.jpg testprog.jpg
- cmp testimg.ppm testout.ppm
- cmp testimg.bmp testout.bmp
- cmp testimg.jpg testout.jpg
- cmp testimg.ppm testoutp.ppm
- cmp testimgp.jpg testoutp.jpg
- cmp testorig.jpg testoutt.jpg
-
-
-jcapimin.o: jcapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcapistd.o: jcapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccoefct.o: jccoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccolor.o: jccolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcdctmgr.o: jcdctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jchuff.o: jchuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcinit.o: jcinit.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmainct.o: jcmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmarker.o: jcmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmaster.o: jcmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcomapi.o: jcomapi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcparam.o: jcparam.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcphuff.o: jcphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcprepct.o: jcprepct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcsample.o: jcsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jctrans.o: jctrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapimin.o: jdapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapistd.o: jdapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdatadst.o: jdatadst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdatasrc.o: jdatasrc.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdcoefct.o: jdcoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdcolor.o: jdcolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jddctmgr.o: jddctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jdhuff.o: jdhuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdinput.o: jdinput.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmainct.o: jdmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmarker.o: jdmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmaster.o: jdmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmerge.o: jdmerge.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdphuff.o: jdphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdpostct.o: jdpostct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdsample.o: jdsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdtrans.o: jdtrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jerror.o: jerror.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jversion.h jerror.h
-jfdctflt.o: jfdctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctfst.o: jfdctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctint.o: jfdctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctflt.o: jidctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctfst.o: jidctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctint.o: jidctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctred.o: jidctred.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jquant1.o: jquant1.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jquant2.o: jquant2.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jutils.o: jutils.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jmemmgr.o: jmemmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemansi.o: jmemansi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemname.o: jmemname.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemnobs.o: jmemnobs.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemdos.o: jmemdos.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemmac.o: jmemmac.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-cjpeg.o: cjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-djpeg.o: djpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-jpegtran.o: jpegtran.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h transupp.h jversion.h
-rdjpgcom.o: rdjpgcom.c jinclude.h jconfig.h
-wrjpgcom.o: wrjpgcom.c jinclude.h jconfig.h
-cdjpeg.o: cdjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdcolmap.o: rdcolmap.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdswitch.o: rdswitch.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-transupp.o: transupp.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h transupp.h
-rdppm.o: rdppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrppm.o: wrppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdgif.o: rdgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrgif.o: wrgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdtarga.o: rdtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrtarga.o: wrtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdbmp.o: rdbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrbmp.o: wrbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdrle.o: rdrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrrle.o: wrrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+++ /dev/null
-# Makefile for Independent JPEG Group's software
-
-# This makefile is for Microsoft Visual C++ on Windows NT (and 95?).
-# It builds the IJG library as a statically linkable library (.LIB),
-# and builds the sample applications as console-mode apps.
-# Thanks to Xingong Chang, Raymond Everly and others.
-
-# Read installation instructions before saying "nmake" !!
-# To build an optimized library without debug info, say "nmake nodebug=1".
-
-# Pull in standard variable definitions
-!include <win32.mak>
-
-# You may want to adjust these compiler options:
-CFLAGS= $(cflags) $(cdebug) $(cvars) -I.
-# Generally, we recommend defining any configuration symbols in jconfig.h,
-# NOT via -D switches here.
-
-# Link-time options:
-LDFLAGS= $(ldebug) $(conlflags)
-
-# To link any special libraries, add the necessary commands here.
-LDLIBS= $(conlibs)
-
-# Put here the object file name for the correct system-dependent memory
-# manager file. For NT we suggest jmemnobs.obj, which expects the OS to
-# provide adequate virtual memory.
-SYSDEPMEM= jmemnobs.obj
-
-# miscellaneous OS-dependent stuff
-# file deletion command
-RM= del
-
-# End of configurable options.
-
-
-# source files: JPEG library proper
-LIBSOURCES= jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c \
- jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c \
- jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c \
- jdatadst.c jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c \
- jdinput.c jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c \
- jdpostct.c jdsample.c jdtrans.c jerror.c jfdctflt.c jfdctfst.c \
- jfdctint.c jidctflt.c jidctfst.c jidctint.c jidctred.c jquant1.c \
- jquant2.c jutils.c jmemmgr.c
-# memmgr back ends: compile only one of these into a working library
-SYSDEPSOURCES= jmemansi.c jmemname.c jmemnobs.c jmemdos.c jmemmac.c
-# source files: cjpeg/djpeg/jpegtran applications, also rdjpgcom/wrjpgcom
-APPSOURCES= cjpeg.c djpeg.c jpegtran.c rdjpgcom.c wrjpgcom.c cdjpeg.c \
- rdcolmap.c rdswitch.c transupp.c rdppm.c wrppm.c rdgif.c wrgif.c \
- rdtarga.c wrtarga.c rdbmp.c wrbmp.c rdrle.c wrrle.c
-SOURCES= $(LIBSOURCES) $(SYSDEPSOURCES) $(APPSOURCES)
-# files included by source files
-INCLUDES= jchuff.h jdhuff.h jdct.h jerror.h jinclude.h jmemsys.h jmorecfg.h \
- jpegint.h jpeglib.h jversion.h cdjpeg.h cderror.h transupp.h
-# documentation, test, and support files
-DOCS= README install.doc usage.doc cjpeg.1 djpeg.1 jpegtran.1 rdjpgcom.1 \
- wrjpgcom.1 wizard.doc example.c libjpeg.doc structure.doc \
- coderules.doc filelist.doc change.log
-MKFILES= configure makefile.cfg makefile.ansi makefile.unix makefile.bcc \
- makefile.mc6 makefile.dj makefile.wat makefile.vc makelib.ds \
- makeapps.ds makeproj.mac makcjpeg.st makdjpeg.st makljpeg.st \
- maktjpeg.st makefile.manx makefile.sas makefile.mms makefile.vms \
- makvms.opt
-CONFIGFILES= jconfig.cfg jconfig.bcc jconfig.mc6 jconfig.dj jconfig.wat \
- jconfig.vc jconfig.mac jconfig.st jconfig.manx jconfig.sas \
- jconfig.vms
-CONFIGUREFILES= config.guess config.sub install-sh ltconfig ltmain.sh
-OTHERFILES= jconfig.doc ckconfig.c ansi2knr.c ansi2knr.1 jmemdosa.asm
-TESTFILES= testorig.jpg testimg.ppm testimg.bmp testimg.jpg testprog.jpg \
- testimgp.jpg
-DISTFILES= $(DOCS) $(MKFILES) $(CONFIGFILES) $(SOURCES) $(INCLUDES) \
- $(CONFIGUREFILES) $(OTHERFILES) $(TESTFILES)
-# library object files common to compression and decompression
-COMOBJECTS= jcomapi.obj jutils.obj jerror.obj jmemmgr.obj $(SYSDEPMEM)
-# compression library object files
-CLIBOBJECTS= jcapimin.obj jcapistd.obj jctrans.obj jcparam.obj jdatadst.obj \
- jcinit.obj jcmaster.obj jcmarker.obj jcmainct.obj jcprepct.obj \
- jccoefct.obj jccolor.obj jcsample.obj jchuff.obj jcphuff.obj \
- jcdctmgr.obj jfdctfst.obj jfdctflt.obj jfdctint.obj
-# decompression library object files
-DLIBOBJECTS= jdapimin.obj jdapistd.obj jdtrans.obj jdatasrc.obj \
- jdmaster.obj jdinput.obj jdmarker.obj jdhuff.obj jdphuff.obj \
- jdmainct.obj jdcoefct.obj jdpostct.obj jddctmgr.obj jidctfst.obj \
- jidctflt.obj jidctint.obj jidctred.obj jdsample.obj jdcolor.obj \
- jquant1.obj jquant2.obj jdmerge.obj
-# These objectfiles are included in libjpeg.lib
-LIBOBJECTS= $(CLIBOBJECTS) $(DLIBOBJECTS) $(COMOBJECTS)
-# object files for sample applications (excluding library files)
-COBJECTS= cjpeg.obj rdppm.obj rdgif.obj rdtarga.obj rdrle.obj rdbmp.obj \
- rdswitch.obj cdjpeg.obj
-DOBJECTS= djpeg.obj wrppm.obj wrgif.obj wrtarga.obj wrrle.obj wrbmp.obj \
- rdcolmap.obj cdjpeg.obj
-TROBJECTS= jpegtran.obj rdswitch.obj cdjpeg.obj transupp.obj
-
-# Template command for compiling .c to .obj
-.c.obj:
- $(cc) $(CFLAGS) $*.c
-
-
-all: libjpeg.lib cjpeg.exe djpeg.exe jpegtran.exe rdjpgcom.exe wrjpgcom.exe
-
-libjpeg.lib: $(LIBOBJECTS)
- $(RM) libjpeg.lib
- lib -out:libjpeg.lib $(LIBOBJECTS)
-
-cjpeg.exe: $(COBJECTS) libjpeg.lib
- $(link) $(LDFLAGS) -out:cjpeg.exe $(COBJECTS) libjpeg.lib $(LDLIBS)
-
-djpeg.exe: $(DOBJECTS) libjpeg.lib
- $(link) $(LDFLAGS) -out:djpeg.exe $(DOBJECTS) libjpeg.lib $(LDLIBS)
-
-jpegtran.exe: $(TROBJECTS) libjpeg.lib
- $(link) $(LDFLAGS) -out:jpegtran.exe $(TROBJECTS) libjpeg.lib $(LDLIBS)
-
-rdjpgcom.exe: rdjpgcom.obj
- $(link) $(LDFLAGS) -out:rdjpgcom.exe rdjpgcom.obj $(LDLIBS)
-
-wrjpgcom.exe: wrjpgcom.obj
- $(link) $(LDFLAGS) -out:wrjpgcom.exe wrjpgcom.obj $(LDLIBS)
-
-
-clean:
- $(RM) *.obj *.exe libjpeg.lib
- $(RM) testout*
-
-test: cjpeg.exe djpeg.exe jpegtran.exe
- $(RM) testout*
- .\djpeg -dct int -ppm -outfile testout.ppm testorig.jpg
- .\djpeg -dct int -bmp -colors 256 -outfile testout.bmp testorig.jpg
- .\cjpeg -dct int -outfile testout.jpg testimg.ppm
- .\djpeg -dct int -ppm -outfile testoutp.ppm testprog.jpg
- .\cjpeg -dct int -progressive -opt -outfile testoutp.jpg testimg.ppm
- .\jpegtran -outfile testoutt.jpg testprog.jpg
- fc /b testimg.ppm testout.ppm
- fc /b testimg.bmp testout.bmp
- fc /b testimg.jpg testout.jpg
- fc /b testimg.ppm testoutp.ppm
- fc /b testimgp.jpg testoutp.jpg
- fc /b testorig.jpg testoutt.jpg
-
-
-jcapimin.obj: jcapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcapistd.obj: jcapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccoefct.obj: jccoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccolor.obj: jccolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcdctmgr.obj: jcdctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jchuff.obj: jchuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcinit.obj: jcinit.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmainct.obj: jcmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmarker.obj: jcmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmaster.obj: jcmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcomapi.obj: jcomapi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcparam.obj: jcparam.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcphuff.obj: jcphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcprepct.obj: jcprepct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcsample.obj: jcsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jctrans.obj: jctrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapimin.obj: jdapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapistd.obj: jdapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdatadst.obj: jdatadst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdatasrc.obj: jdatasrc.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdcoefct.obj: jdcoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdcolor.obj: jdcolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jddctmgr.obj: jddctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jdhuff.obj: jdhuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdinput.obj: jdinput.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmainct.obj: jdmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmarker.obj: jdmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmaster.obj: jdmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmerge.obj: jdmerge.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdphuff.obj: jdphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdpostct.obj: jdpostct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdsample.obj: jdsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdtrans.obj: jdtrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jerror.obj: jerror.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jversion.h jerror.h
-jfdctflt.obj: jfdctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctfst.obj: jfdctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctint.obj: jfdctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctflt.obj: jidctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctfst.obj: jidctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctint.obj: jidctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctred.obj: jidctred.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jquant1.obj: jquant1.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jquant2.obj: jquant2.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jutils.obj: jutils.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jmemmgr.obj: jmemmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemansi.obj: jmemansi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemname.obj: jmemname.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemnobs.obj: jmemnobs.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemdos.obj: jmemdos.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemmac.obj: jmemmac.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-cjpeg.obj: cjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-djpeg.obj: djpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-jpegtran.obj: jpegtran.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h transupp.h jversion.h
-rdjpgcom.obj: rdjpgcom.c jinclude.h jconfig.h
-wrjpgcom.obj: wrjpgcom.c jinclude.h jconfig.h
-cdjpeg.obj: cdjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdcolmap.obj: rdcolmap.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdswitch.obj: rdswitch.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-transupp.obj: transupp.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h transupp.h
-rdppm.obj: rdppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrppm.obj: wrppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdgif.obj: rdgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrgif.obj: wrgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdtarga.obj: rdtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrtarga.obj: wrtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdbmp.obj: rdbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrbmp.obj: wrbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdrle.obj: rdrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrrle.obj: wrrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+++ /dev/null
-$! Makefile for Independent JPEG Group's software
-$!
-$! This is a command procedure for Digital VMS systems that do not have MMS.
-$! It builds the JPEG software by brute force, recompiling everything whether
-$! or not it is necessary. It then runs the basic self-test.
-$! Thanks to Rick Dyson (dyson@iowasp.physics.uiowa.edu)
-$! and Tim Bell (tbell@netcom.com) for their help.
-$!
-$! Read installation instructions before running this!!
-$!
-$ If F$Mode () .eqs. "INTERACTIVE"
-$ Then
-$ VERIFY = F$Verify (0)
-$ Else
-$ VERIFY = F$Verify (1)
-$ EndIf
-$ On Control_Y Then GoTo End
-$ On Error Then GoTo End
-$
-$ If F$GetSyi ("HW_MODEL") .gt. 1023
-$ Then
-$ OPT = ""
-$ Else
-$ OPT = ",Sys$Disk:[]makvms.opt/Option"
-$ EndIf
-$
-$ DoCompile := CC /NoDebug /Optimize /NoList
-$!
-$ DoCompile jcapimin.c
-$ DoCompile jcapistd.c
-$ DoCompile jctrans.c
-$ DoCompile jcparam.c
-$ DoCompile jdatadst.c
-$ DoCompile jcinit.c
-$ DoCompile jcmaster.c
-$ DoCompile jcmarker.c
-$ DoCompile jcmainct.c
-$ DoCompile jcprepct.c
-$ DoCompile jccoefct.c
-$ DoCompile jccolor.c
-$ DoCompile jcsample.c
-$ DoCompile jchuff.c
-$ DoCompile jcphuff.c
-$ DoCompile jcdctmgr.c
-$ DoCompile jfdctfst.c
-$ DoCompile jfdctflt.c
-$ DoCompile jfdctint.c
-$ DoCompile jdapimin.c
-$ DoCompile jdapistd.c
-$ DoCompile jdtrans.c
-$ DoCompile jdatasrc.c
-$ DoCompile jdmaster.c
-$ DoCompile jdinput.c
-$ DoCompile jdmarker.c
-$ DoCompile jdhuff.c
-$ DoCompile jdphuff.c
-$ DoCompile jdmainct.c
-$ DoCompile jdcoefct.c
-$ DoCompile jdpostct.c
-$ DoCompile jddctmgr.c
-$ DoCompile jidctfst.c
-$ DoCompile jidctflt.c
-$ DoCompile jidctint.c
-$ DoCompile jidctred.c
-$ DoCompile jdsample.c
-$ DoCompile jdcolor.c
-$ DoCompile jquant1.c
-$ DoCompile jquant2.c
-$ DoCompile jdmerge.c
-$ DoCompile jcomapi.c
-$ DoCompile jutils.c
-$ DoCompile jerror.c
-$ DoCompile jmemmgr.c
-$ DoCompile jmemnobs.c
-$!
-$ Library /Create libjpeg.olb jcapimin.obj,jcapistd.obj,jctrans.obj, -
- jcparam.obj,jdatadst.obj,jcinit.obj,jcmaster.obj,jcmarker.obj, -
- jcmainct.obj,jcprepct.obj,jccoefct.obj,jccolor.obj,jcsample.obj, -
- jchuff.obj,jcphuff.obj,jcdctmgr.obj,jfdctfst.obj,jfdctflt.obj, -
- jfdctint.obj,jdapimin.obj,jdapistd.obj,jdtrans.obj,jdatasrc.obj, -
- jdmaster.obj,jdinput.obj,jdmarker.obj,jdhuff.obj,jdphuff.obj, -
- jdmainct.obj,jdcoefct.obj,jdpostct.obj,jddctmgr.obj,jidctfst.obj, -
- jidctflt.obj,jidctint.obj,jidctred.obj,jdsample.obj,jdcolor.obj, -
- jquant1.obj,jquant2.obj,jdmerge.obj,jcomapi.obj,jutils.obj, -
- jerror.obj,jmemmgr.obj,jmemnobs.obj
-$!
-$ DoCompile cjpeg.c
-$ DoCompile rdppm.c
-$ DoCompile rdgif.c
-$ DoCompile rdtarga.c
-$ DoCompile rdrle.c
-$ DoCompile rdbmp.c
-$ DoCompile rdswitch.c
-$ DoCompile cdjpeg.c
-$!
-$ Link /NoMap /Executable = cjpeg.exe cjpeg.obj,rdppm.obj,rdgif.obj, -
- rdtarga.obj,rdrle.obj,rdbmp.obj,rdswitch.obj,cdjpeg.obj,libjpeg.olb/Library'OPT'
-$!
-$ DoCompile djpeg.c
-$ DoCompile wrppm.c
-$ DoCompile wrgif.c
-$ DoCompile wrtarga.c
-$ DoCompile wrrle.c
-$ DoCompile wrbmp.c
-$ DoCompile rdcolmap.c
-$ DoCompile cdjpeg.c
-$!
-$ Link /NoMap /Executable = djpeg.exe djpeg.obj,wrppm.obj,wrgif.obj, -
- wrtarga.obj,wrrle.obj,wrbmp.obj,rdcolmap.obj,cdjpeg.obj,libjpeg.olb/Library'OPT'
-$!
-$ DoCompile jpegtran.c
-$ DoCompile rdswitch.c
-$ DoCompile cdjpeg.c
-$ DoCompile transupp.c
-$!
-$ Link /NoMap /Executable = jpegtran.exe jpegtran.obj,rdswitch.obj, -
- cdjpeg.obj,transupp.obj,libjpeg.olb/Library'OPT'
-$!
-$ DoCompile rdjpgcom.c
-$ Link /NoMap /Executable = rdjpgcom.exe rdjpgcom.obj'OPT'
-$!
-$ DoCompile wrjpgcom.c
-$ Link /NoMap /Executable = wrjpgcom.exe wrjpgcom.obj'OPT'
-$!
-$! Run the self-test
-$!
-$ mcr sys$disk:[]djpeg -dct int -ppm -outfile testout.ppm testorig.jpg
-$ mcr sys$disk:[]djpeg -dct int -bmp -colors 256 -outfile testout.bmp testorig.jpg
-$ mcr sys$disk:[]cjpeg -dct int -outfile testout.jpg testimg.ppm
-$ mcr sys$disk:[]djpeg -dct int -ppm -outfile testoutp.ppm testprog.jpg
-$ mcr sys$disk:[]cjpeg -dct int -progressive -opt -outfile testoutp.jpg testimg.ppm
-$ mcr sys$disk:[]jpegtran -outfile testoutt.jpg testprog.jpg
-$ Backup /Compare/Log testimg.ppm testout.ppm
-$ Backup /Compare/Log testimg.bmp testout.bmp
-$ Backup /Compare/Log testimg.jpg testout.jpg
-$ Backup /Compare/Log testimg.ppm testoutp.ppm
-$ Backup /Compare/Log testimgp.jpg testoutp.jpg
-$ Backup /Compare/Log testorig.jpg testoutt.jpg
-$!
-$End:
-$ If Verify Then Set Verify
-$ Exit
+++ /dev/null
-# Makefile for Independent JPEG Group's software
-
-# This makefile is suitable for Watcom C/C++ 10.0 on MS-DOS (using
-# dos4g extender), OS/2, and Windows NT console mode.
-# Thanks to Janos Haide, jhaide@btrvtech.com.
-
-# Read installation instructions before saying "wmake" !!
-
-# Uncomment line for desired system
-SYSTEM=DOS
-#SYSTEM=OS2
-#SYSTEM=NT
-
-# The name of your C compiler:
-CC= wcl386
-
-# You may need to adjust these cc options:
-CFLAGS= -4r -ort -wx -zq -bt=$(SYSTEM)
-# Caution: avoid -ol or -ox; these generate bad code with 10.0 or 10.0a.
-# Generally, we recommend defining any configuration symbols in jconfig.h,
-# NOT via -D switches here.
-
-# Link-time cc options:
-!ifeq SYSTEM DOS
-LDFLAGS= -zq -l=dos4g
-!else ifeq SYSTEM OS2
-LDFLAGS= -zq -l=os2v2
-!else ifeq SYSTEM NT
-LDFLAGS= -zq -l=nt
-!endif
-
-# Put here the object file name for the correct system-dependent memory
-# manager file. jmemnobs should work fine for dos4g or OS/2 environment.
-SYSDEPMEM= jmemnobs.obj
-
-# End of configurable options.
-
-
-# source files: JPEG library proper
-LIBSOURCES= jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c &
- jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c &
- jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c &
- jdatadst.c jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c &
- jdinput.c jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c &
- jdpostct.c jdsample.c jdtrans.c jerror.c jfdctflt.c jfdctfst.c &
- jfdctint.c jidctflt.c jidctfst.c jidctint.c jidctred.c jquant1.c &
- jquant2.c jutils.c jmemmgr.c
-# memmgr back ends: compile only one of these into a working library
-SYSDEPSOURCES= jmemansi.c jmemname.c jmemnobs.c jmemdos.c jmemmac.c
-# source files: cjpeg/djpeg/jpegtran applications, also rdjpgcom/wrjpgcom
-APPSOURCES= cjpeg.c djpeg.c jpegtran.c rdjpgcom.c wrjpgcom.c cdjpeg.c &
- rdcolmap.c rdswitch.c transupp.c rdppm.c wrppm.c rdgif.c wrgif.c &
- rdtarga.c wrtarga.c rdbmp.c wrbmp.c rdrle.c wrrle.c
-SOURCES= $(LIBSOURCES) $(SYSDEPSOURCES) $(APPSOURCES)
-# files included by source files
-INCLUDES= jchuff.h jdhuff.h jdct.h jerror.h jinclude.h jmemsys.h jmorecfg.h &
- jpegint.h jpeglib.h jversion.h cdjpeg.h cderror.h transupp.h
-# documentation, test, and support files
-DOCS= README install.doc usage.doc cjpeg.1 djpeg.1 jpegtran.1 rdjpgcom.1 &
- wrjpgcom.1 wizard.doc example.c libjpeg.doc structure.doc &
- coderules.doc filelist.doc change.log
-MKFILES= configure makefile.cfg makefile.ansi makefile.unix makefile.bcc &
- makefile.mc6 makefile.dj makefile.wat makefile.vc makelib.ds &
- makeapps.ds makeproj.mac makcjpeg.st makdjpeg.st makljpeg.st &
- maktjpeg.st makefile.manx makefile.sas makefile.mms makefile.vms &
- makvms.opt
-CONFIGFILES= jconfig.cfg jconfig.bcc jconfig.mc6 jconfig.dj jconfig.wat &
- jconfig.vc jconfig.mac jconfig.st jconfig.manx jconfig.sas &
- jconfig.vms
-CONFIGUREFILES= config.guess config.sub install-sh ltconfig ltmain.sh
-OTHERFILES= jconfig.doc ckconfig.c ansi2knr.c ansi2knr.1 jmemdosa.asm
-TESTFILES= testorig.jpg testimg.ppm testimg.bmp testimg.jpg testprog.jpg &
- testimgp.jpg
-DISTFILES= $(DOCS) $(MKFILES) $(CONFIGFILES) $(SOURCES) $(INCLUDES) &
- $(CONFIGUREFILES) $(OTHERFILES) $(TESTFILES)
-# library object files common to compression and decompression
-COMOBJECTS= jcomapi.obj jutils.obj jerror.obj jmemmgr.obj $(SYSDEPMEM)
-# compression library object files
-CLIBOBJECTS= jcapimin.obj jcapistd.obj jctrans.obj jcparam.obj jdatadst.obj &
- jcinit.obj jcmaster.obj jcmarker.obj jcmainct.obj jcprepct.obj &
- jccoefct.obj jccolor.obj jcsample.obj jchuff.obj jcphuff.obj &
- jcdctmgr.obj jfdctfst.obj jfdctflt.obj jfdctint.obj
-# decompression library object files
-DLIBOBJECTS= jdapimin.obj jdapistd.obj jdtrans.obj jdatasrc.obj &
- jdmaster.obj jdinput.obj jdmarker.obj jdhuff.obj jdphuff.obj &
- jdmainct.obj jdcoefct.obj jdpostct.obj jddctmgr.obj jidctfst.obj &
- jidctflt.obj jidctint.obj jidctred.obj jdsample.obj jdcolor.obj &
- jquant1.obj jquant2.obj jdmerge.obj
-# These objectfiles are included in libjpeg.lib
-LIBOBJECTS= $(CLIBOBJECTS) $(DLIBOBJECTS) $(COMOBJECTS)
-# object files for sample applications (excluding library files)
-COBJECTS= cjpeg.obj rdppm.obj rdgif.obj rdtarga.obj rdrle.obj rdbmp.obj &
- rdswitch.obj cdjpeg.obj
-DOBJECTS= djpeg.obj wrppm.obj wrgif.obj wrtarga.obj wrrle.obj wrbmp.obj &
- rdcolmap.obj cdjpeg.obj
-TROBJECTS= jpegtran.obj rdswitch.obj cdjpeg.obj transupp.obj
-
-
-all: libjpeg.lib cjpeg.exe djpeg.exe jpegtran.exe rdjpgcom.exe wrjpgcom.exe
-
-libjpeg.lib: $(LIBOBJECTS)
- - del libjpeg.lib
- * wlib -n libjpeg.lib $(LIBOBJECTS)
-
-cjpeg.exe: $(COBJECTS) libjpeg.lib
- $(CC) $(LDFLAGS) $(COBJECTS) libjpeg.lib
-
-djpeg.exe: $(DOBJECTS) libjpeg.lib
- $(CC) $(LDFLAGS) $(DOBJECTS) libjpeg.lib
-
-jpegtran.exe: $(TROBJECTS) libjpeg.lib
- $(CC) $(LDFLAGS) $(TROBJECTS) libjpeg.lib
-
-rdjpgcom.exe: rdjpgcom.c
- $(CC) $(CFLAGS) $(LDFLAGS) rdjpgcom.c
-
-wrjpgcom.exe: wrjpgcom.c
- $(CC) $(CFLAGS) $(LDFLAGS) wrjpgcom.c
-
-.c.obj:
- $(CC) $(CFLAGS) -c $<
-
-jconfig.h: jconfig.doc
- echo You must prepare a system-dependent jconfig.h file.
- echo Please read the installation directions in install.doc.
- exit 1
-
-clean: .SYMBOLIC
- - del *.obj
- - del libjpeg.lib
- - del cjpeg.exe
- - del djpeg.exe
- - del jpegtran.exe
- - del rdjpgcom.exe
- - del wrjpgcom.exe
- - del testout*.*
-
-test: cjpeg.exe djpeg.exe jpegtran.exe .SYMBOLIC
- - del testout*.*
- djpeg -dct int -ppm -outfile testout.ppm testorig.jpg
- djpeg -dct int -bmp -colors 256 -outfile testout.bmp testorig.jpg
- cjpeg -dct int -outfile testout.jpg testimg.ppm
- djpeg -dct int -ppm -outfile testoutp.ppm testprog.jpg
- cjpeg -dct int -progressive -opt -outfile testoutp.jpg testimg.ppm
- jpegtran -outfile testoutt.jpg testprog.jpg
-!ifeq SYSTEM DOS
- fc /b testimg.ppm testout.ppm
- fc /b testimg.bmp testout.bmp
- fc /b testimg.jpg testout.jpg
- fc /b testimg.ppm testoutp.ppm
- fc /b testimgp.jpg testoutp.jpg
- fc /b testorig.jpg testoutt.jpg
-!else
- echo n > n.tmp
- comp testimg.ppm testout.ppm < n.tmp
- comp testimg.bmp testout.bmp < n.tmp
- comp testimg.jpg testout.jpg < n.tmp
- comp testimg.ppm testoutp.ppm < n.tmp
- comp testimgp.jpg testoutp.jpg < n.tmp
- comp testorig.jpg testoutt.jpg < n.tmp
- del n.tmp
-!endif
-
-
-jcapimin.obj: jcapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcapistd.obj: jcapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccoefct.obj: jccoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jccolor.obj: jccolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcdctmgr.obj: jcdctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jchuff.obj: jchuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcinit.obj: jcinit.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmainct.obj: jcmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmarker.obj: jcmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcmaster.obj: jcmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcomapi.obj: jcomapi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcparam.obj: jcparam.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcphuff.obj: jcphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
-jcprepct.obj: jcprepct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jcsample.obj: jcsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jctrans.obj: jctrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapimin.obj: jdapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdapistd.obj: jdapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdatadst.obj: jdatadst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdatasrc.obj: jdatasrc.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
-jdcoefct.obj: jdcoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdcolor.obj: jdcolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jddctmgr.obj: jddctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jdhuff.obj: jdhuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdinput.obj: jdinput.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmainct.obj: jdmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmarker.obj: jdmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmaster.obj: jdmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdmerge.obj: jdmerge.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdphuff.obj: jdphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
-jdpostct.obj: jdpostct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdsample.obj: jdsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jdtrans.obj: jdtrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jerror.obj: jerror.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jversion.h jerror.h
-jfdctflt.obj: jfdctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctfst.obj: jfdctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jfdctint.obj: jfdctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctflt.obj: jidctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctfst.obj: jidctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctint.obj: jidctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jidctred.obj: jidctred.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
-jquant1.obj: jquant1.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jquant2.obj: jquant2.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jutils.obj: jutils.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
-jmemmgr.obj: jmemmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemansi.obj: jmemansi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemname.obj: jmemname.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemnobs.obj: jmemnobs.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemdos.obj: jmemdos.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-jmemmac.obj: jmemmac.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
-cjpeg.obj: cjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-djpeg.obj: djpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
-jpegtran.obj: jpegtran.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h transupp.h jversion.h
-rdjpgcom.obj: rdjpgcom.c jinclude.h jconfig.h
-wrjpgcom.obj: wrjpgcom.c jinclude.h jconfig.h
-cdjpeg.obj: cdjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdcolmap.obj: rdcolmap.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdswitch.obj: rdswitch.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-transupp.obj: transupp.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h transupp.h
-rdppm.obj: rdppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrppm.obj: wrppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdgif.obj: rdgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrgif.obj: wrgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdtarga.obj: rdtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrtarga.obj: wrtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdbmp.obj: rdbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrbmp.obj: wrbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-rdrle.obj: rdrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
-wrrle.obj: wrrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+++ /dev/null
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-# ** DO NOT EDIT **
-
-# TARGTYPE "Win32 (x86) Static Library" 0x0104
-
-!IF "$(CFG)" == ""
-CFG=jpeg - Win32
-!MESSAGE No configuration specified. Defaulting to jpeg - Win32.
-!ENDIF
-
-!IF "$(CFG)" != "jpeg - Win32"
-!MESSAGE Invalid configuration "$(CFG)" specified.
-!MESSAGE You can specify a configuration when running NMAKE on this makefile
-!MESSAGE by defining the macro CFG on the command line. For example:
-!MESSAGE
-!MESSAGE NMAKE /f "jpeg.mak" CFG="jpeg - Win32"
-!MESSAGE
-!MESSAGE Possible choices for configuration are:
-!MESSAGE
-!MESSAGE "jpeg - Win32" (based on "Win32 (x86) Static Library")
-!MESSAGE
-!ERROR An invalid configuration is specified.
-!ENDIF
-
-!IF "$(OS)" == "Windows_NT"
-NULL=
-!ELSE
-NULL=nul
-!ENDIF
-################################################################################
-# Begin Project
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-CPP=cl.exe
-
-!IF "$(CFG)" == "jpeg - Win32"
-
-# PROP BASE Use_MFC 0
-# PROP BASE Use_Debug_Libraries 0
-# PROP BASE Output_Dir "Release"
-# PROP BASE Intermediate_Dir "Release"
-# PROP BASE Target_Dir ""
-# PROP Use_MFC 0
-# PROP Use_Debug_Libraries 0
-# PROP Output_Dir "Release"
-# PROP Intermediate_Dir "Release"
-# PROP Target_Dir ""
-OUTDIR=.\Release
-INTDIR=.\Release
-
-ALL : "$(OUTDIR)\jpeg.lib"
-
-CLEAN :
- -@erase "$(INTDIR)\jcapimin.obj"
- -@erase "$(INTDIR)\jcapistd.obj"
- -@erase "$(INTDIR)\jctrans.obj"
- -@erase "$(INTDIR)\jcparam.obj"
- -@erase "$(INTDIR)\jdatadst.obj"
- -@erase "$(INTDIR)\jcinit.obj"
- -@erase "$(INTDIR)\jcmaster.obj"
- -@erase "$(INTDIR)\jcmarker.obj"
- -@erase "$(INTDIR)\jcmainct.obj"
- -@erase "$(INTDIR)\jcprepct.obj"
- -@erase "$(INTDIR)\jccoefct.obj"
- -@erase "$(INTDIR)\jccolor.obj"
- -@erase "$(INTDIR)\jcsample.obj"
- -@erase "$(INTDIR)\jchuff.obj"
- -@erase "$(INTDIR)\jcphuff.obj"
- -@erase "$(INTDIR)\jcdctmgr.obj"
- -@erase "$(INTDIR)\jfdctfst.obj"
- -@erase "$(INTDIR)\jfdctflt.obj"
- -@erase "$(INTDIR)\jfdctint.obj"
- -@erase "$(INTDIR)\jdapimin.obj"
- -@erase "$(INTDIR)\jdapistd.obj"
- -@erase "$(INTDIR)\jdtrans.obj"
- -@erase "$(INTDIR)\jdatasrc.obj"
- -@erase "$(INTDIR)\jdmaster.obj"
- -@erase "$(INTDIR)\jdinput.obj"
- -@erase "$(INTDIR)\jdmarker.obj"
- -@erase "$(INTDIR)\jdhuff.obj"
- -@erase "$(INTDIR)\jdphuff.obj"
- -@erase "$(INTDIR)\jdmainct.obj"
- -@erase "$(INTDIR)\jdcoefct.obj"
- -@erase "$(INTDIR)\jdpostct.obj"
- -@erase "$(INTDIR)\jddctmgr.obj"
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- -@erase "$(INTDIR)\jquant2.obj"
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-
-"$(OUTDIR)" :
- if not exist "$(OUTDIR)/$(NULL)" mkdir "$(OUTDIR)"
-
-# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /YX /c
-# ADD CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /YX /c
-CPP_PROJ=/nologo /ML /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS"\
- /Fp"$(INTDIR)/jpeg.pch" /YX /Fo"$(INTDIR)/" /c
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-# Begin Target
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-# Name "jpeg - Win32"
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-!IF "$(CFG)" == "jpeg - Win32"
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-!ENDIF
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-################################################################################
-# Begin Source File
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-SOURCE="jcapimin.c"
-DEP_CPP_JCAPI=\
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-# End Source File
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-# End Source File
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-# End Source File
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-SOURCE="jchuff.c"
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- "jpegint.h"\
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-# End Source File
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-SOURCE="jcinit.c"
-DEP_CPP_JCINI=\
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-# End Source File
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-SOURCE="jcmainct.c"
-DEP_CPP_JCMAI=\
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-# End Source File
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-SOURCE="jcmarker.c"
-DEP_CPP_JCMAR=\
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-
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-# End Source File
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-SOURCE="jcmaster.c"
-DEP_CPP_JCMAS=\
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-# End Source File
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-SOURCE="jcomapi.c"
-DEP_CPP_JCOMA=\
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- "jconfig.h"\
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-# End Source File
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-SOURCE="jctrans.c"
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-SOURCE="jddctmgr.c"
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-SOURCE="jfdctint.c"
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-
+++ /dev/null
---
--- makeproj.mac
---
--- This AppleScript builds Code Warrior PRO Release 2 project files for the
--- libjpeg library as well as the test programs 'cjpeg', 'djpeg', 'jpegtran'.
--- (We'd distribute real project files, except they're not text
--- and would create maintenance headaches.)
---
--- The script then compiles and links the library and the test programs.
--- NOTE: if you haven't already created a 'jconfig.h' file, the script
--- automatically copies 'jconfig.mac' to 'jconfig.h'.
---
--- To use this script, you must have AppleScript 1.1 or later installed
--- and a suitable AppleScript editor like Script Editor or Script Debugger
--- (http://www.latenightsw.com). Open this file with your AppleScript
--- editor and execute the "run" command to build the projects.
---
--- Thanks to Dan Sears and Don Agro for this script.
--- Questions about this script can be addressed to dogpark@interlog.com
---
-
-on run
-
- choose folder with prompt ">>> Select IJG source folder <<<"
- set ijg_folder to result
-
- choose folder with prompt ">>> Select MetroWerks folder <<<"
- set cw_folder to result
-
- -- if jconfig.h doesn't already exist, copy jconfig.mac
-
- tell application "Finder"
- if not (exists file "jconfig.h" of ijg_folder) then
- duplicate {file "jconfig.mac" of folder ijg_folder}
- select file "jconfig.mac copy" of folder ijg_folder
- set name of selection to "jconfig.h"
- end if
- end tell
-
- tell application "CodeWarrior IDE 2.1"
- with timeout of 10000 seconds
-
- -- create libjpeg project
-
- activate
- Create Project (ijg_folder as string) & "libjpeg.proj"
- Set Preferences of panel "Target Settings" to {Target Name:"libjpeg"}
- Set Preferences of panel "PPC Project" to {File Name:"libjpeg"}
- Set Preferences of panel "Target Settings" to {Linker:"MacOS PPC Linker"}
- Set Preferences of panel "PPC Project" to {Project Type:library}
- Set Preferences of panel "C/C++ Compiler" to {ANSI Strict:true}
- Set Preferences of panel "C/C++ Compiler" to {Enums Always Ints:true}
- Set Preferences of panel "PPC Codegen" to {Struct Alignment:PowerPC}
- Set Preferences of panel "PPC Linker" to {Generate SYM File:false}
-
- Add Files (ijg_folder as string) & "jcapimin.c" To Segment 1
- Add Files (ijg_folder as string) & "jcapistd.c" To Segment 1
- Add Files (ijg_folder as string) & "jctrans.c" To Segment 1
- Add Files (ijg_folder as string) & "jcparam.c" To Segment 1
- Add Files (ijg_folder as string) & "jdatadst.c" To Segment 1
- Add Files (ijg_folder as string) & "jcinit.c" To Segment 1
- Add Files (ijg_folder as string) & "jcmaster.c" To Segment 1
- Add Files (ijg_folder as string) & "jcmarker.c" To Segment 1
- Add Files (ijg_folder as string) & "jcmainct.c" To Segment 1
- Add Files (ijg_folder as string) & "jcprepct.c" To Segment 1
- Add Files (ijg_folder as string) & "jccoefct.c" To Segment 1
- Add Files (ijg_folder as string) & "jccolor.c" To Segment 1
- Add Files (ijg_folder as string) & "jcsample.c" To Segment 1
- Add Files (ijg_folder as string) & "jchuff.c" To Segment 1
- Add Files (ijg_folder as string) & "jcphuff.c" To Segment 1
- Add Files (ijg_folder as string) & "jcdctmgr.c" To Segment 1
- Add Files (ijg_folder as string) & "jfdctfst.c" To Segment 1
- Add Files (ijg_folder as string) & "jfdctflt.c" To Segment 1
- Add Files (ijg_folder as string) & "jfdctint.c" To Segment 1
- Add Files (ijg_folder as string) & "jdapimin.c" To Segment 1
- Add Files (ijg_folder as string) & "jdapistd.c" To Segment 1
- Add Files (ijg_folder as string) & "jdtrans.c" To Segment 1
- Add Files (ijg_folder as string) & "jdatasrc.c" To Segment 1
- Add Files (ijg_folder as string) & "jdmaster.c" To Segment 1
- Add Files (ijg_folder as string) & "jdinput.c" To Segment 1
- Add Files (ijg_folder as string) & "jdmarker.c" To Segment 1
- Add Files (ijg_folder as string) & "jdhuff.c" To Segment 1
- Add Files (ijg_folder as string) & "jdphuff.c" To Segment 1
- Add Files (ijg_folder as string) & "jdmainct.c" To Segment 1
- Add Files (ijg_folder as string) & "jdcoefct.c" To Segment 1
- Add Files (ijg_folder as string) & "jdpostct.c" To Segment 1
- Add Files (ijg_folder as string) & "jddctmgr.c" To Segment 1
- Add Files (ijg_folder as string) & "jidctfst.c" To Segment 1
- Add Files (ijg_folder as string) & "jidctflt.c" To Segment 1
- Add Files (ijg_folder as string) & "jidctint.c" To Segment 1
- Add Files (ijg_folder as string) & "jidctred.c" To Segment 1
- Add Files (ijg_folder as string) & "jdsample.c" To Segment 1
- Add Files (ijg_folder as string) & "jdcolor.c" To Segment 1
- Add Files (ijg_folder as string) & "jquant1.c" To Segment 1
- Add Files (ijg_folder as string) & "jquant2.c" To Segment 1
- Add Files (ijg_folder as string) & "jdmerge.c" To Segment 1
- Add Files (ijg_folder as string) & "jcomapi.c" To Segment 1
- Add Files (ijg_folder as string) & "jutils.c" To Segment 1
- Add Files (ijg_folder as string) & "jerror.c" To Segment 1
- Add Files (ijg_folder as string) & "jmemmgr.c" To Segment 1
- Add Files (ijg_folder as string) & "jmemmac.c" To Segment 1
-
- -- compile and link the library
-
- Make Project
- Close Project
-
- -- create cjpeg project
-
- activate
- Create Project (ijg_folder as string) & "cjpeg.proj"
- Set Preferences of panel "Target Settings" to {Target Name:"cjpeg"}
- Set Preferences of panel "PPC Project" to {File Name:"cjpeg"}
- Set Preferences of panel "Target Settings" to {Linker:"MacOS PPC Linker"}
- Set Preferences of panel "C/C++ Compiler" to {ANSI Strict:true}
- Set Preferences of panel "C/C++ Compiler" to {Enums Always Ints:true}
- Set Preferences of panel "PPC Codegen" to {Struct Alignment:PowerPC}
- Set Preferences of panel "PPC Linker" to {Generate SYM File:false}
-
- Add Files (ijg_folder as string) & "cjpeg.c" To Segment 1
- Add Files (ijg_folder as string) & "rdppm.c" To Segment 1
- Add Files (ijg_folder as string) & "rdgif.c" To Segment 1
- Add Files (ijg_folder as string) & "rdtarga.c" To Segment 1
- Add Files (ijg_folder as string) & "rdrle.c" To Segment 1
- Add Files (ijg_folder as string) & "rdbmp.c" To Segment 1
- Add Files (ijg_folder as string) & "rdswitch.c" To Segment 1
- Add Files (ijg_folder as string) & "cdjpeg.c" To Segment 1
-
- Add Files (ijg_folder as string) & "libjpeg" To Segment 2
-
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:Metrowerks Standard Library:MSL C:Bin:MSL C.PPC.Lib" To Segment 3
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:Metrowerks Standard Library:MSL C:Bin:MSL SIOUX.PPC.Lib" To Segment 3
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:MacOS Support:Libraries:Runtime:Runtime PPC:MSL RuntimePPC.Lib" To Segment 3
-
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:MacOS Support:Libraries:MacOS Common:InterfaceLib" To Segment 4
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:MacOS Support:Libraries:MacOS Common:MathLib" To Segment 4
-
- -- compile and link cjpeg
-
- Make Project
- Close Project
-
- -- create djpeg project
-
- activate
- Create Project (ijg_folder as string) & "djpeg.proj"
- Set Preferences of panel "Target Settings" to {Target Name:"djpeg"}
- Set Preferences of panel "PPC Project" to {File Name:"djpeg"}
- Set Preferences of panel "Target Settings" to {Linker:"MacOS PPC Linker"}
- Set Preferences of panel "C/C++ Compiler" to {ANSI Strict:true}
- Set Preferences of panel "C/C++ Compiler" to {Enums Always Ints:true}
- Set Preferences of panel "PPC Codegen" to {Struct Alignment:PowerPC}
- Set Preferences of panel "PPC Linker" to {Generate SYM File:false}
-
- Add Files (ijg_folder as string) & "djpeg.c" To Segment 1
- Add Files (ijg_folder as string) & "wrppm.c" To Segment 1
- Add Files (ijg_folder as string) & "wrgif.c" To Segment 1
- Add Files (ijg_folder as string) & "wrtarga.c" To Segment 1
- Add Files (ijg_folder as string) & "wrrle.c" To Segment 1
- Add Files (ijg_folder as string) & "wrbmp.c" To Segment 1
- Add Files (ijg_folder as string) & "rdcolmap.c" To Segment 1
- Add Files (ijg_folder as string) & "cdjpeg.c" To Segment 1
-
- Add Files (ijg_folder as string) & "libjpeg" To Segment 2
-
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:Metrowerks Standard Library:MSL C:Bin:MSL C.PPC.Lib" To Segment 3
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:Metrowerks Standard Library:MSL C:Bin:MSL SIOUX.PPC.Lib" To Segment 3
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:MacOS Support:Libraries:Runtime:Runtime PPC:MSL RuntimePPC.Lib" To Segment 3
-
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:MacOS Support:Libraries:MacOS Common:InterfaceLib" To Segment 4
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:MacOS Support:Libraries:MacOS Common:MathLib" To Segment 4
-
- -- compile and link djpeg
-
- Make Project
- Close Project
-
- -- create jpegtran project
-
- activate
- Create Project (ijg_folder as string) & "jpegtran.proj"
- Set Preferences of panel "Target Settings" to {Target Name:"jpegtran"}
- Set Preferences of panel "PPC Project" to {File Name:"jpegtran"}
- Set Preferences of panel "Target Settings" to {Linker:"MacOS PPC Linker"}
- Set Preferences of panel "C/C++ Compiler" to {ANSI Strict:true}
- Set Preferences of panel "C/C++ Compiler" to {Enums Always Ints:true}
- Set Preferences of panel "PPC Codegen" to {Struct Alignment:PowerPC}
- Set Preferences of panel "PPC Linker" to {Generate SYM File:false}
-
- Add Files (ijg_folder as string) & "jpegtran.c" To Segment 1
- Add Files (ijg_folder as string) & "rdswitch.c" To Segment 1
- Add Files (ijg_folder as string) & "cdjpeg.c" To Segment 1
- Add Files (ijg_folder as string) & "transupp.c" To Segment 1
-
- Add Files (ijg_folder as string) & "libjpeg" To Segment 2
-
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:Metrowerks Standard Library:MSL C:Bin:MSL C.PPC.Lib" To Segment 3
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:Metrowerks Standard Library:MSL C:Bin:MSL SIOUX.PPC.Lib" To Segment 3
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:MacOS Support:Libraries:Runtime:Runtime PPC:MSL RuntimePPC.Lib" To Segment 3
-
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:MacOS Support:Libraries:MacOS Common:InterfaceLib" To Segment 4
- Add Files (cw_folder as string) & "Metrowerks CodeWarrior:MacOS Support:Libraries:MacOS Common:MathLib" To Segment 4
-
- -- compile and link jpegtran
-
- Make Project
- Close Project
-
- quit
-
- end timeout
- end tell
-end run
+++ /dev/null
-; Project file for Independent JPEG Group's software
-;
-; This project file is for Atari ST/STE/TT systems using Pure C or Turbo C.
-; Thanks to Frank Moehle (Frank.Moehle@arbi.informatik.uni-oldenburg.de),
-; Dr. B. Setzepfandt (bernd@gina.uni-muenster.de),
-; and Guido Vollbeding (guivol@esc.de).
-;
-; To use this file, rename it to libjpeg.prj.
-; Read installation instructions before trying to make the program!
-;
-;
-; * * * Output file * * *
-libjpeg.lib
-;
-; * * * COMPILER OPTIONS * * *
-.C[-P] ; absolute calls
-.C[-M] ; and no string merging, folks
-.C[-w-cln] ; no "constant is long" warnings
-.C[-w-par] ; no "parameter xxxx unused"
-.C[-w-rch] ; no "unreachable code"
-.C[-wsig] ; warn if significant digits may be lost
-.L[-J] ; link new Obj-format (so we get a library)
-=
-; * * * * List of modules * * * *
-jcapimin.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jcapistd.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jccoefct.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jccolor.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jcdctmgr.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jdct.h)
-jchuff.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jchuff.h)
-jcinit.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jcmainct.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jcmarker.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jcmaster.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jcomapi.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jcparam.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jcphuff.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jchuff.h)
-jcprepct.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jcsample.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jctrans.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jdapimin.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jdapistd.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jdatadst.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jerror.h)
-jdatasrc.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jerror.h)
-jdcoefct.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jdcolor.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jddctmgr.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jdct.h)
-jdhuff.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jdhuff.h)
-jdinput.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jdmainct.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jdmarker.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jdmaster.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jdmerge.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jdphuff.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jdhuff.h)
-jdpostct.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jdsample.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jdtrans.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jerror.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jversion.h,jerror.h)
-jfdctflt.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jdct.h)
-jfdctfst.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jdct.h)
-jfdctint.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jdct.h)
-jidctflt.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jdct.h)
-jidctfst.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jdct.h)
-jidctint.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jdct.h)
-jidctred.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jdct.h)
-jquant1.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jquant2.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jutils.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h)
-jmemmgr.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jmemsys.h)
-jmemansi.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,jmemsys.h)
+++ /dev/null
-; Project file for Independent JPEG Group's software
-;
-; This project file is for Atari ST/STE/TT systems using Pure C or Turbo C.
-; Thanks to Frank Moehle (Frank.Moehle@arbi.informatik.uni-oldenburg.de),
-; Dr. B. Setzepfandt (bernd@gina.uni-muenster.de),
-; and Guido Vollbeding (guivol@esc.de).
-;
-; To use this file, rename it to jpegtran.prj.
-; If you are using Turbo C, change filenames beginning with "pc..." to "tc..."
-; Read installation instructions before trying to make the program!
-;
-;
-; * * * Output file * * *
-jpegtran.ttp
-;
-; * * * COMPILER OPTIONS * * *
-.C[-P] ; absolute calls
-.C[-M] ; and no string merging, folks
-.C[-w-cln] ; no "constant is long" warnings
-.C[-w-par] ; no "parameter xxxx unused"
-.C[-w-rch] ; no "unreachable code"
-.C[-wsig] ; warn if significant digits may be lost
-=
-; * * * * List of modules * * * *
-pcstart.o
-jpegtran.c (cdjpeg.h,jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jerror.h,cderror.h,transupp.h,jversion.h)
-cdjpeg.c (cdjpeg.h,jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jerror.h,cderror.h)
-rdswitch.c (cdjpeg.h,jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jerror.h,cderror.h)
-transupp.c (jinclude.h,jconfig.h,jpeglib.h,jmorecfg.h,jpegint.h,jerror.h,transupp.h)
-libjpeg.lib ; built by libjpeg.prj
-pcstdlib.lib ; standard library
-pcextlib.lib ; extended library
+++ /dev/null
-! A pointer to the VAX/VMS C Run-Time Shareable Library.
-! This file is needed by makefile.mms and makefile.vms,
-! but only for the older VAX C compiler. DEC C does not need it.
-Sys$Library:VAXCRTL.EXE /Share
+++ /dev/null
-/*
- * rdbmp.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to read input images in Microsoft "BMP"
- * format (MS Windows 3.x, OS/2 1.x, and OS/2 2.x flavors).
- * Currently, only 8-bit and 24-bit images are supported, not 1-bit or
- * 4-bit (feeding such low-depth images into JPEG would be silly anyway).
- * Also, we don't support RLE-compressed files.
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume input from
- * an ordinary stdio stream. They further assume that reading begins
- * at the start of the file; start_input may need work if the
- * user interface has already read some data (e.g., to determine that
- * the file is indeed BMP format).
- *
- * This code contributed by James Arthur Boucher.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef BMP_SUPPORTED
-
-
-/* Macros to deal with unsigned chars as efficiently as compiler allows */
-
-#ifdef HAVE_UNSIGNED_CHAR
-typedef unsigned char U_CHAR;
-#define UCH(x) ((int) (x))
-#else /* !HAVE_UNSIGNED_CHAR */
-#ifdef CHAR_IS_UNSIGNED
-typedef char U_CHAR;
-#define UCH(x) ((int) (x))
-#else
-typedef char U_CHAR;
-#define UCH(x) ((int) (x) & 0xFF)
-#endif
-#endif /* HAVE_UNSIGNED_CHAR */
-
-
-#define ReadOK(file,buffer,len) (JFREAD(file,buffer,len) == ((size_t) (len)))
-
-
-/* Private version of data source object */
-
-typedef struct _bmp_source_struct * bmp_source_ptr;
-
-typedef struct _bmp_source_struct {
- struct cjpeg_source_struct pub; /* public fields */
-
- j_compress_ptr cinfo; /* back link saves passing separate parm */
-
- JSAMPARRAY colormap; /* BMP colormap (converted to my format) */
-
- jvirt_sarray_ptr whole_image; /* Needed to reverse row order */
- JDIMENSION source_row; /* Current source row number */
- JDIMENSION row_width; /* Physical width of scanlines in file */
-
- int bits_per_pixel; /* remembers 8- or 24-bit format */
-} bmp_source_struct;
-
-
-LOCAL(int)
-read_byte (bmp_source_ptr sinfo)
-/* Read next byte from BMP file */
-{
- register FILE *infile = sinfo->pub.input_file;
- register int c;
-
- if ((c = getc(infile)) == EOF)
- ERREXIT(sinfo->cinfo, JERR_INPUT_EOF);
- return c;
-}
-
-
-LOCAL(void)
-read_colormap (bmp_source_ptr sinfo, int cmaplen, int mapentrysize)
-/* Read the colormap from a BMP file */
-{
- int i;
-
- switch (mapentrysize) {
- case 3:
- /* BGR format (occurs in OS/2 files) */
- for (i = 0; i < cmaplen; i++) {
- sinfo->colormap[2][i] = (JSAMPLE) read_byte(sinfo);
- sinfo->colormap[1][i] = (JSAMPLE) read_byte(sinfo);
- sinfo->colormap[0][i] = (JSAMPLE) read_byte(sinfo);
- }
- break;
- case 4:
- /* BGR0 format (occurs in MS Windows files) */
- for (i = 0; i < cmaplen; i++) {
- sinfo->colormap[2][i] = (JSAMPLE) read_byte(sinfo);
- sinfo->colormap[1][i] = (JSAMPLE) read_byte(sinfo);
- sinfo->colormap[0][i] = (JSAMPLE) read_byte(sinfo);
- (void) read_byte(sinfo);
- }
- break;
- default:
- ERREXIT(sinfo->cinfo, JERR_BMP_BADCMAP);
- break;
- }
-}
-
-
-/*
- * Read one row of pixels.
- * The image has been read into the whole_image array, but is otherwise
- * unprocessed. We must read it out in top-to-bottom row order, and if
- * it is an 8-bit image, we must expand colormapped pixels to 24bit format.
- */
-
-METHODDEF(JDIMENSION)
-get_8bit_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading 8-bit colormap indexes */
-{
- bmp_source_ptr source = (bmp_source_ptr) sinfo;
- register JSAMPARRAY colormap = source->colormap;
- JSAMPARRAY image_ptr;
- register int t;
- register JSAMPROW inptr, outptr;
- register JDIMENSION col;
-
- /* Fetch next row from virtual array */
- source->source_row--;
- image_ptr = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->whole_image,
- source->source_row, (JDIMENSION) 1, FALSE);
-
- /* Expand the colormap indexes to real data */
- inptr = image_ptr[0];
- outptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- t = GETJSAMPLE(*inptr++);
- *outptr++ = colormap[0][t]; /* can omit GETJSAMPLE() safely */
- *outptr++ = colormap[1][t];
- *outptr++ = colormap[2][t];
- }
-
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_24bit_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading 24-bit pixels */
-{
- bmp_source_ptr source = (bmp_source_ptr) sinfo;
- JSAMPARRAY image_ptr;
- register JSAMPROW inptr, outptr;
- register JDIMENSION col;
-
- /* Fetch next row from virtual array */
- source->source_row--;
- image_ptr = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->whole_image,
- source->source_row, (JDIMENSION) 1, FALSE);
-
- /* Transfer data. Note source values are in BGR order
- * (even though Microsoft's own documents say the opposite).
- */
- inptr = image_ptr[0];
- outptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- outptr[2] = *inptr++; /* can omit GETJSAMPLE() safely */
- outptr[1] = *inptr++;
- outptr[0] = *inptr++;
- outptr += 3;
- }
-
- return 1;
-}
-
-
-/*
- * This method loads the image into whole_image during the first call on
- * get_pixel_rows. The get_pixel_rows pointer is then adjusted to call
- * get_8bit_row or get_24bit_row on subsequent calls.
- */
-
-METHODDEF(JDIMENSION)
-preload_image (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- bmp_source_ptr source = (bmp_source_ptr) sinfo;
- register FILE *infile = source->pub.input_file;
- register int c;
- register JSAMPROW out_ptr;
- JSAMPARRAY image_ptr;
- JDIMENSION row, col;
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-
- /* Read the data into a virtual array in input-file row order. */
- for (row = 0; row < cinfo->image_height; row++) {
- if (progress != NULL) {
- progress->pub.pass_counter = (long) row;
- progress->pub.pass_limit = (long) cinfo->image_height;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
- image_ptr = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->whole_image,
- row, (JDIMENSION) 1, TRUE);
- out_ptr = image_ptr[0];
- for (col = source->row_width; col > 0; col--) {
- /* inline copy of read_byte() for speed */
- if ((c = getc(infile)) == EOF)
- ERREXIT(cinfo, JERR_INPUT_EOF);
- *out_ptr++ = (JSAMPLE) c;
- }
- }
- if (progress != NULL)
- progress->completed_extra_passes++;
-
- /* Set up to read from the virtual array in top-to-bottom order */
- switch (source->bits_per_pixel) {
- case 8:
- source->pub.get_pixel_rows = get_8bit_row;
- break;
- case 24:
- source->pub.get_pixel_rows = get_24bit_row;
- break;
- default:
- ERREXIT(cinfo, JERR_BMP_BADDEPTH);
- }
- source->source_row = cinfo->image_height;
-
- /* And read the first row */
- return (*source->pub.get_pixel_rows) (cinfo, sinfo);
-}
-
-
-/*
- * Read the file header; return image size and component count.
- */
-
-METHODDEF(void)
-start_input_bmp (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- bmp_source_ptr source = (bmp_source_ptr) sinfo;
- U_CHAR bmpfileheader[14];
- U_CHAR bmpinfoheader[64];
-#define GET_2B(array,offset) ((unsigned int) UCH(array[offset]) + \
- (((unsigned int) UCH(array[offset+1])) << 8))
-#define GET_4B(array,offset) ((INT32) UCH(array[offset]) + \
- (((INT32) UCH(array[offset+1])) << 8) + \
- (((INT32) UCH(array[offset+2])) << 16) + \
- (((INT32) UCH(array[offset+3])) << 24))
- INT32 bfOffBits;
- INT32 headerSize;
- INT32 biWidth = 0; /* initialize to avoid compiler warning */
- INT32 biHeight = 0;
- unsigned int biPlanes;
- INT32 biCompression;
- INT32 biXPelsPerMeter,biYPelsPerMeter;
- INT32 biClrUsed = 0;
- int mapentrysize = 0; /* 0 indicates no colormap */
- INT32 bPad;
- JDIMENSION row_width;
-
- /* Read and verify the bitmap file header */
- if (! ReadOK(source->pub.input_file, bmpfileheader, 14))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- if (GET_2B(bmpfileheader,0) != 0x4D42) /* 'BM' */
- ERREXIT(cinfo, JERR_BMP_NOT);
- bfOffBits = (INT32) GET_4B(bmpfileheader,10);
- /* We ignore the remaining fileheader fields */
-
- /* The infoheader might be 12 bytes (OS/2 1.x), 40 bytes (Windows),
- * or 64 bytes (OS/2 2.x). Check the first 4 bytes to find out which.
- */
- if (! ReadOK(source->pub.input_file, bmpinfoheader, 4))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- headerSize = (INT32) GET_4B(bmpinfoheader,0);
- if (headerSize < 12 || headerSize > 64)
- ERREXIT(cinfo, JERR_BMP_BADHEADER);
- if (! ReadOK(source->pub.input_file, bmpinfoheader+4, headerSize-4))
- ERREXIT(cinfo, JERR_INPUT_EOF);
-
- switch ((int) headerSize) {
- case 12:
- /* Decode OS/2 1.x header (Microsoft calls this a BITMAPCOREHEADER) */
- biWidth = (INT32) GET_2B(bmpinfoheader,4);
- biHeight = (INT32) GET_2B(bmpinfoheader,6);
- biPlanes = GET_2B(bmpinfoheader,8);
- source->bits_per_pixel = (int) GET_2B(bmpinfoheader,10);
-
- switch (source->bits_per_pixel) {
- case 8: /* colormapped image */
- mapentrysize = 3; /* OS/2 uses RGBTRIPLE colormap */
- TRACEMS2(cinfo, 1, JTRC_BMP_OS2_MAPPED, (int) biWidth, (int) biHeight);
- break;
- case 24: /* RGB image */
- TRACEMS2(cinfo, 1, JTRC_BMP_OS2, (int) biWidth, (int) biHeight);
- break;
- default:
- ERREXIT(cinfo, JERR_BMP_BADDEPTH);
- break;
- }
- if (biPlanes != 1)
- ERREXIT(cinfo, JERR_BMP_BADPLANES);
- break;
- case 40:
- case 64:
- /* Decode Windows 3.x header (Microsoft calls this a BITMAPINFOHEADER) */
- /* or OS/2 2.x header, which has additional fields that we ignore */
- biWidth = GET_4B(bmpinfoheader,4);
- biHeight = GET_4B(bmpinfoheader,8);
- biPlanes = GET_2B(bmpinfoheader,12);
- source->bits_per_pixel = (int) GET_2B(bmpinfoheader,14);
- biCompression = GET_4B(bmpinfoheader,16);
- biXPelsPerMeter = GET_4B(bmpinfoheader,24);
- biYPelsPerMeter = GET_4B(bmpinfoheader,28);
- biClrUsed = GET_4B(bmpinfoheader,32);
- /* biSizeImage, biClrImportant fields are ignored */
-
- switch (source->bits_per_pixel) {
- case 8: /* colormapped image */
- mapentrysize = 4; /* Windows uses RGBQUAD colormap */
- TRACEMS2(cinfo, 1, JTRC_BMP_MAPPED, (int) biWidth, (int) biHeight);
- break;
- case 24: /* RGB image */
- TRACEMS2(cinfo, 1, JTRC_BMP, (int) biWidth, (int) biHeight);
- break;
- default:
- ERREXIT(cinfo, JERR_BMP_BADDEPTH);
- break;
- }
- if (biPlanes != 1)
- ERREXIT(cinfo, JERR_BMP_BADPLANES);
- if (biCompression != 0)
- ERREXIT(cinfo, JERR_BMP_COMPRESSED);
-
- if (biXPelsPerMeter > 0 && biYPelsPerMeter > 0) {
- /* Set JFIF density parameters from the BMP data */
- cinfo->X_density = (UINT16) (biXPelsPerMeter/100); /* 100 cm per meter */
- cinfo->Y_density = (UINT16) (biYPelsPerMeter/100);
- cinfo->density_unit = 2; /* dots/cm */
- }
- break;
- default:
- ERREXIT(cinfo, JERR_BMP_BADHEADER);
- break;
- }
-
- /* Compute distance to bitmap data --- will adjust for colormap below */
- bPad = bfOffBits - (headerSize + 14);
-
- /* Read the colormap, if any */
- if (mapentrysize > 0) {
- if (biClrUsed <= 0)
- biClrUsed = 256; /* assume it's 256 */
- else if (biClrUsed > 256)
- ERREXIT(cinfo, JERR_BMP_BADCMAP);
- /* Allocate space to store the colormap */
- source->colormap = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (JDIMENSION) biClrUsed, (JDIMENSION) 3);
- /* and read it from the file */
- read_colormap(source, (int) biClrUsed, mapentrysize);
- /* account for size of colormap */
- bPad -= biClrUsed * mapentrysize;
- }
-
- /* Skip any remaining pad bytes */
- if (bPad < 0) /* incorrect bfOffBits value? */
- ERREXIT(cinfo, JERR_BMP_BADHEADER);
- while (--bPad >= 0) {
- (void) read_byte(source);
- }
-
- /* Compute row width in file, including padding to 4-byte boundary */
- if (source->bits_per_pixel == 24)
- row_width = (JDIMENSION) (biWidth * 3);
- else
- row_width = (JDIMENSION) biWidth;
- while ((row_width & 3) != 0) row_width++;
- source->row_width = row_width;
-
- /* Allocate space for inversion array, prepare for preload pass */
- source->whole_image = (*cinfo->mem->request_virt_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
- row_width, (JDIMENSION) biHeight, (JDIMENSION) 1);
- source->pub.get_pixel_rows = preload_image;
- if (cinfo->progress != NULL) {
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
- progress->total_extra_passes++; /* count file input as separate pass */
- }
-
- /* Allocate one-row buffer for returned data */
- source->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (JDIMENSION) (biWidth * 3), (JDIMENSION) 1);
- source->pub.buffer_height = 1;
-
- cinfo->in_color_space = JCS_RGB;
- cinfo->input_components = 3;
- cinfo->data_precision = 8;
- cinfo->image_width = (JDIMENSION) biWidth;
- cinfo->image_height = (JDIMENSION) biHeight;
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_input_bmp (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- /* no work */
-}
-
-
-/*
- * The module selection routine for BMP format input.
- */
-
-GLOBAL(cjpeg_source_ptr)
-jinit_read_bmp (j_compress_ptr cinfo)
-{
- bmp_source_ptr source;
-
- /* Create module interface object */
- source = (bmp_source_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(bmp_source_struct));
- source->cinfo = cinfo; /* make back link for subroutines */
- /* Fill in method ptrs, except get_pixel_rows which start_input sets */
- source->pub.start_input = start_input_bmp;
- source->pub.finish_input = finish_input_bmp;
-
- return (cjpeg_source_ptr) source;
-}
-
-#endif /* BMP_SUPPORTED */
+++ /dev/null
-/*
- * rdcolmap.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file implements djpeg's "-map file" switch. It reads a source image
- * and constructs a colormap to be supplied to the JPEG decompressor.
- *
- * Currently, these file formats are supported for the map file:
- * GIF: the contents of the GIF's global colormap are used.
- * PPM (either text or raw flavor): the entire file is read and
- * each unique pixel value is entered in the map.
- * Note that reading a large PPM file will be horrendously slow.
- * Typically, a PPM-format map file should contain just one pixel
- * of each desired color. Such a file can be extracted from an
- * ordinary image PPM file with ppmtomap(1).
- *
- * Rescaling a PPM that has a maxval unequal to MAXJSAMPLE is not
- * currently implemented.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef QUANT_2PASS_SUPPORTED /* otherwise can't quantize to supplied map */
-
-/* Portions of this code are based on the PBMPLUS library, which is:
-**
-** Copyright (C) 1988 by Jef Poskanzer.
-**
-** Permission to use, copy, modify, and distribute this software and its
-** documentation for any purpose and without fee is hereby granted, provided
-** that the above copyright notice appear in all copies and that both that
-** copyright notice and this permission notice appear in supporting
-** documentation. This software is provided "as is" without express or
-** implied warranty.
-*/
-
-
-/*
- * Add a (potentially) new color to the color map.
- */
-
-LOCAL(void)
-add_map_entry (j_decompress_ptr cinfo, int R, int G, int B)
-{
- JSAMPROW colormap0 = cinfo->colormap[0];
- JSAMPROW colormap1 = cinfo->colormap[1];
- JSAMPROW colormap2 = cinfo->colormap[2];
- int ncolors = cinfo->actual_number_of_colors;
- int index;
-
- /* Check for duplicate color. */
- for (index = 0; index < ncolors; index++) {
- if (GETJSAMPLE(colormap0[index]) == R &&
- GETJSAMPLE(colormap1[index]) == G &&
- GETJSAMPLE(colormap2[index]) == B)
- return; /* color is already in map */
- }
-
- /* Check for map overflow. */
- if (ncolors >= (MAXJSAMPLE+1))
- ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, (MAXJSAMPLE+1));
-
- /* OK, add color to map. */
- colormap0[ncolors] = (JSAMPLE) R;
- colormap1[ncolors] = (JSAMPLE) G;
- colormap2[ncolors] = (JSAMPLE) B;
- cinfo->actual_number_of_colors++;
-}
-
-
-/*
- * Extract color map from a GIF file.
- */
-
-LOCAL(void)
-read_gif_map (j_decompress_ptr cinfo, FILE * infile)
-{
- int header[13];
- int i, colormaplen;
- int R, G, B;
-
- /* Initial 'G' has already been read by read_color_map */
- /* Read the rest of the GIF header and logical screen descriptor */
- for (i = 1; i < 13; i++) {
- if ((header[i] = getc(infile)) == EOF)
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
- }
-
- /* Verify GIF Header */
- if (header[1] != 'I' || header[2] != 'F')
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
-
- /* There must be a global color map. */
- if ((header[10] & 0x80) == 0)
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
-
- /* OK, fetch it. */
- colormaplen = 2 << (header[10] & 0x07);
-
- for (i = 0; i < colormaplen; i++) {
- R = getc(infile);
- G = getc(infile);
- B = getc(infile);
- if (R == EOF || G == EOF || B == EOF)
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
- add_map_entry(cinfo,
- R << (BITS_IN_JSAMPLE-8),
- G << (BITS_IN_JSAMPLE-8),
- B << (BITS_IN_JSAMPLE-8));
- }
-}
-
-
-/* Support routines for reading PPM */
-
-
-LOCAL(int)
-pbm_getc (FILE * infile)
-/* Read next char, skipping over any comments */
-/* A comment/newline sequence is returned as a newline */
-{
- register int ch;
-
- ch = getc(infile);
- if (ch == '#') {
- do {
- ch = getc(infile);
- } while (ch != '\n' && ch != EOF);
- }
- return ch;
-}
-
-
-LOCAL(unsigned int)
-read_pbm_integer (j_decompress_ptr cinfo, FILE * infile)
-/* Read an unsigned decimal integer from the PPM file */
-/* Swallows one trailing character after the integer */
-/* Note that on a 16-bit-int machine, only values up to 64k can be read. */
-/* This should not be a problem in practice. */
-{
- register int ch;
- register unsigned int val;
-
- /* Skip any leading whitespace */
- do {
- ch = pbm_getc(infile);
- if (ch == EOF)
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
- } while (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r');
-
- if (ch < '0' || ch > '9')
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
-
- val = ch - '0';
- while ((ch = pbm_getc(infile)) >= '0' && ch <= '9') {
- val *= 10;
- val += ch - '0';
- }
- return val;
-}
-
-
-/*
- * Extract color map from a PPM file.
- */
-
-LOCAL(void)
-read_ppm_map (j_decompress_ptr cinfo, FILE * infile)
-{
- int c;
- unsigned int w, h, maxval, row, col;
- int R, G, B;
-
- /* Initial 'P' has already been read by read_color_map */
- c = getc(infile); /* save format discriminator for a sec */
-
- /* while we fetch the remaining header info */
- w = read_pbm_integer(cinfo, infile);
- h = read_pbm_integer(cinfo, infile);
- maxval = read_pbm_integer(cinfo, infile);
-
- if (w <= 0 || h <= 0 || maxval <= 0) /* error check */
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
-
- /* For now, we don't support rescaling from an unusual maxval. */
- if (maxval != (unsigned int) MAXJSAMPLE)
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
-
- switch (c) {
- case '3': /* it's a text-format PPM file */
- for (row = 0; row < h; row++) {
- for (col = 0; col < w; col++) {
- R = read_pbm_integer(cinfo, infile);
- G = read_pbm_integer(cinfo, infile);
- B = read_pbm_integer(cinfo, infile);
- add_map_entry(cinfo, R, G, B);
- }
- }
- break;
-
- case '6': /* it's a raw-format PPM file */
- for (row = 0; row < h; row++) {
- for (col = 0; col < w; col++) {
- R = getc(infile);
- G = getc(infile);
- B = getc(infile);
- if (R == EOF || G == EOF || B == EOF)
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
- add_map_entry(cinfo, R, G, B);
- }
- }
- break;
-
- default:
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
- break;
- }
-}
-
-
-/*
- * Main entry point from djpeg.c.
- * Input: opened input file (from file name argument on command line).
- * Output: colormap and actual_number_of_colors fields are set in cinfo.
- */
-
-GLOBAL(void)
-read_color_map (j_decompress_ptr cinfo, FILE * infile)
-{
- /* Allocate space for a color map of maximum supported size. */
- cinfo->colormap = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (JDIMENSION) (MAXJSAMPLE+1), (JDIMENSION) 3);
- cinfo->actual_number_of_colors = 0; /* initialize map to empty */
-
- /* Read first byte to determine file format */
- switch (getc(infile)) {
- case 'G':
- read_gif_map(cinfo, infile);
- break;
- case 'P':
- read_ppm_map(cinfo, infile);
- break;
- default:
- ERREXIT(cinfo, JERR_BAD_CMAP_FILE);
- break;
- }
-}
-
-#endif /* QUANT_2PASS_SUPPORTED */
+++ /dev/null
-/*
- * rdgif.c
- *
- * Copyright (C) 1991-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to read input images in GIF format.
- *
- *****************************************************************************
- * NOTE: to avoid entanglements with Unisys' patent on LZW compression, *
- * the ability to read GIF files has been removed from the IJG distribution. *
- * Sorry about that. *
- *****************************************************************************
- *
- * We are required to state that
- * "The Graphics Interchange Format(c) is the Copyright property of
- * CompuServe Incorporated. GIF(sm) is a Service Mark property of
- * CompuServe Incorporated."
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef GIF_SUPPORTED
-
-/*
- * The module selection routine for GIF format input.
- */
-
-GLOBAL(cjpeg_source_ptr)
-jinit_read_gif (j_compress_ptr cinfo)
-{
- fprintf(stderr, "GIF input is unsupported for legal reasons. Sorry.\n");
- exit(EXIT_FAILURE);
- return NULL; /* keep compiler happy */
-}
-
-#endif /* GIF_SUPPORTED */
+++ /dev/null
-.TH RDJPGCOM 1 "11 October 1997"
-.SH NAME
-rdjpgcom \- display text comments from a JPEG file
-.SH SYNOPSIS
-.B rdjpgcom
-[
-.B \-verbose
-]
-[
-.I filename
-]
-.LP
-.SH DESCRIPTION
-.LP
-.B rdjpgcom
-reads the named JPEG/JFIF file, or the standard input if no file is named,
-and prints any text comments found in the file on the standard output.
-.PP
-The JPEG standard allows "comment" (COM) blocks to occur within a JPEG file.
-Although the standard doesn't actually define what COM blocks are for, they
-are widely used to hold user-supplied text strings. This lets you add
-annotations, titles, index terms, etc to your JPEG files, and later retrieve
-them as text. COM blocks do not interfere with the image stored in the JPEG
-file. The maximum size of a COM block is 64K, but you can have as many of
-them as you like in one JPEG file.
-.SH OPTIONS
-.TP
-.B \-verbose
-Causes
-.B rdjpgcom
-to also display the JPEG image dimensions.
-.PP
-Switch names may be abbreviated, and are not case sensitive.
-.SH HINTS
-.B rdjpgcom
-does not depend on the IJG JPEG library. Its source code is intended as an
-illustration of the minimum amount of code required to parse a JPEG file
-header correctly.
-.PP
-In
-.B \-verbose
-mode,
-.B rdjpgcom
-will also attempt to print the contents of any "APP12" markers as text.
-Some digital cameras produce APP12 markers containing useful textual
-information. If you like, you can modify the source code to print
-other APPn marker types as well.
-.SH SEE ALSO
-.BR cjpeg (1),
-.BR djpeg (1),
-.BR jpegtran (1),
-.BR wrjpgcom (1)
-.SH AUTHOR
-Independent JPEG Group
+++ /dev/null
-/*
- * rdjpgcom.c
- *
- * Copyright (C) 1994-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains a very simple stand-alone application that displays
- * the text in COM (comment) markers in a JFIF file.
- * This may be useful as an example of the minimum logic needed to parse
- * JPEG markers.
- */
-
-#define JPEG_CJPEG_DJPEG /* to get the command-line config symbols */
-#include "jinclude.h" /* get auto-config symbols, <stdio.h> */
-
-#include <ctype.h> /* to declare isupper(), tolower() */
-#ifdef USE_SETMODE
-#include <fcntl.h> /* to declare setmode()'s parameter macros */
-/* If you have setmode() but not <io.h>, just delete this line: */
-#include <io.h> /* to declare setmode() */
-#endif
-
-#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
-#ifdef __MWERKS__
-#include <SIOUX.h> /* Metrowerks needs this */
-#include <console.h> /* ... and this */
-#endif
-#ifdef THINK_C
-#include <console.h> /* Think declares it here */
-#endif
-#endif
-
-#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
-#define READ_BINARY "r"
-#else
-#ifdef VMS /* VMS is very nonstandard */
-#define READ_BINARY "rb", "ctx=stm"
-#else /* standard ANSI-compliant case */
-#define READ_BINARY "rb"
-#endif
-#endif
-
-#ifndef EXIT_FAILURE /* define exit() codes if not provided */
-#define EXIT_FAILURE 1
-#endif
-#ifndef EXIT_SUCCESS
-#ifdef VMS
-#define EXIT_SUCCESS 1 /* VMS is very nonstandard */
-#else
-#define EXIT_SUCCESS 0
-#endif
-#endif
-
-
-/*
- * These macros are used to read the input file.
- * To reuse this code in another application, you might need to change these.
- */
-
-static FILE * infile; /* input JPEG file */
-
-/* Return next input byte, or EOF if no more */
-#define NEXTBYTE() getc(infile)
-
-
-/* Error exit handler */
-#define ERREXIT(msg) (fprintf(stderr, "%s\n", msg), exit(EXIT_FAILURE))
-
-
-/* Read one byte, testing for EOF */
-static int
-read_1_byte (void)
-{
- int c;
-
- c = NEXTBYTE();
- if (c == EOF)
- ERREXIT("Premature EOF in JPEG file");
- return c;
-}
-
-/* Read 2 bytes, convert to unsigned int */
-/* All 2-byte quantities in JPEG markers are MSB first */
-static unsigned int
-read_2_bytes (void)
-{
- int c1, c2;
-
- c1 = NEXTBYTE();
- if (c1 == EOF)
- ERREXIT("Premature EOF in JPEG file");
- c2 = NEXTBYTE();
- if (c2 == EOF)
- ERREXIT("Premature EOF in JPEG file");
- return (((unsigned int) c1) << 8) + ((unsigned int) c2);
-}
-
-
-/*
- * JPEG markers consist of one or more 0xFF bytes, followed by a marker
- * code byte (which is not an FF). Here are the marker codes of interest
- * in this program. (See jdmarker.c for a more complete list.)
- */
-
-#define M_SOF0 0xC0 /* Start Of Frame N */
-#define M_SOF1 0xC1 /* N indicates which compression process */
-#define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */
-#define M_SOF3 0xC3
-#define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */
-#define M_SOF6 0xC6
-#define M_SOF7 0xC7
-#define M_SOF9 0xC9
-#define M_SOF10 0xCA
-#define M_SOF11 0xCB
-#define M_SOF13 0xCD
-#define M_SOF14 0xCE
-#define M_SOF15 0xCF
-#define M_SOI 0xD8 /* Start Of Image (beginning of datastream) */
-#define M_EOI 0xD9 /* End Of Image (end of datastream) */
-#define M_SOS 0xDA /* Start Of Scan (begins compressed data) */
-#define M_APP0 0xE0 /* Application-specific marker, type N */
-#define M_APP12 0xEC /* (we don't bother to list all 16 APPn's) */
-#define M_COM 0xFE /* COMment */
-
-
-/*
- * Find the next JPEG marker and return its marker code.
- * We expect at least one FF byte, possibly more if the compressor used FFs
- * to pad the file.
- * There could also be non-FF garbage between markers. The treatment of such
- * garbage is unspecified; we choose to skip over it but emit a warning msg.
- * NB: this routine must not be used after seeing SOS marker, since it will
- * not deal correctly with FF/00 sequences in the compressed image data...
- */
-
-static int
-next_marker (void)
-{
- int c;
- int discarded_bytes = 0;
-
- /* Find 0xFF byte; count and skip any non-FFs. */
- c = read_1_byte();
- while (c != 0xFF) {
- discarded_bytes++;
- c = read_1_byte();
- }
- /* Get marker code byte, swallowing any duplicate FF bytes. Extra FFs
- * are legal as pad bytes, so don't count them in discarded_bytes.
- */
- do {
- c = read_1_byte();
- } while (c == 0xFF);
-
- if (discarded_bytes != 0) {
- fprintf(stderr, "Warning: garbage data found in JPEG file\n");
- }
-
- return c;
-}
-
-
-/*
- * Read the initial marker, which should be SOI.
- * For a JFIF file, the first two bytes of the file should be literally
- * 0xFF M_SOI. To be more general, we could use next_marker, but if the
- * input file weren't actually JPEG at all, next_marker might read the whole
- * file and then return a misleading error message...
- */
-
-static int
-first_marker (void)
-{
- int c1, c2;
-
- c1 = NEXTBYTE();
- c2 = NEXTBYTE();
- if (c1 != 0xFF || c2 != M_SOI)
- ERREXIT("Not a JPEG file");
- return c2;
-}
-
-
-/*
- * Most types of marker are followed by a variable-length parameter segment.
- * This routine skips over the parameters for any marker we don't otherwise
- * want to process.
- * Note that we MUST skip the parameter segment explicitly in order not to
- * be fooled by 0xFF bytes that might appear within the parameter segment;
- * such bytes do NOT introduce new markers.
- */
-
-static void
-skip_variable (void)
-/* Skip over an unknown or uninteresting variable-length marker */
-{
- unsigned int length;
-
- /* Get the marker parameter length count */
- length = read_2_bytes();
- /* Length includes itself, so must be at least 2 */
- if (length < 2)
- ERREXIT("Erroneous JPEG marker length");
- length -= 2;
- /* Skip over the remaining bytes */
- while (length > 0) {
- (void) read_1_byte();
- length--;
- }
-}
-
-
-/*
- * Process a COM marker.
- * We want to print out the marker contents as legible text;
- * we must guard against non-text junk and varying newline representations.
- */
-
-static void
-process_COM (void)
-{
- unsigned int length;
- int ch;
- int lastch = 0;
-
- /* Get the marker parameter length count */
- length = read_2_bytes();
- /* Length includes itself, so must be at least 2 */
- if (length < 2)
- ERREXIT("Erroneous JPEG marker length");
- length -= 2;
-
- while (length > 0) {
- ch = read_1_byte();
- /* Emit the character in a readable form.
- * Nonprintables are converted to \nnn form,
- * while \ is converted to \\.
- * Newlines in CR, CR/LF, or LF form will be printed as one newline.
- */
- if (ch == '\r') {
- printf("\n");
- } else if (ch == '\n') {
- if (lastch != '\r')
- printf("\n");
- } else if (ch == '\\') {
- printf("\\\\");
- } else if (isprint(ch)) {
- putc(ch, stdout);
- } else {
- printf("\\%03o", ch);
- }
- lastch = ch;
- length--;
- }
- printf("\n");
-}
-
-
-/*
- * Process a SOFn marker.
- * This code is only needed if you want to know the image dimensions...
- */
-
-static void
-process_SOFn (int marker)
-{
- unsigned int length;
- unsigned int image_height, image_width;
- int data_precision, num_components;
- const char * process;
- int ci;
-
- length = read_2_bytes(); /* usual parameter length count */
-
- data_precision = read_1_byte();
- image_height = read_2_bytes();
- image_width = read_2_bytes();
- num_components = read_1_byte();
-
- switch (marker) {
- case M_SOF0: process = "Baseline"; break;
- case M_SOF1: process = "Extended sequential"; break;
- case M_SOF2: process = "Progressive"; break;
- case M_SOF3: process = "Lossless"; break;
- case M_SOF5: process = "Differential sequential"; break;
- case M_SOF6: process = "Differential progressive"; break;
- case M_SOF7: process = "Differential lossless"; break;
- case M_SOF9: process = "Extended sequential, arithmetic coding"; break;
- case M_SOF10: process = "Progressive, arithmetic coding"; break;
- case M_SOF11: process = "Lossless, arithmetic coding"; break;
- case M_SOF13: process = "Differential sequential, arithmetic coding"; break;
- case M_SOF14: process = "Differential progressive, arithmetic coding"; break;
- case M_SOF15: process = "Differential lossless, arithmetic coding"; break;
- default: process = "Unknown"; break;
- }
-
- printf("JPEG image is %uw * %uh, %d color components, %d bits per sample\n",
- image_width, image_height, num_components, data_precision);
- printf("JPEG process: %s\n", process);
-
- if (length != (unsigned int) (8 + num_components * 3))
- ERREXIT("Bogus SOF marker length");
-
- for (ci = 0; ci < num_components; ci++) {
- (void) read_1_byte(); /* Component ID code */
- (void) read_1_byte(); /* H, V sampling factors */
- (void) read_1_byte(); /* Quantization table number */
- }
-}
-
-
-/*
- * Parse the marker stream until SOS or EOI is seen;
- * display any COM markers.
- * While the companion program wrjpgcom will always insert COM markers before
- * SOFn, other implementations might not, so we scan to SOS before stopping.
- * If we were only interested in the image dimensions, we would stop at SOFn.
- * (Conversely, if we only cared about COM markers, there would be no need
- * for special code to handle SOFn; we could treat it like other markers.)
- */
-
-static int
-scan_JPEG_header (int verbose)
-{
- int marker;
-
- /* Expect SOI at start of file */
- if (first_marker() != M_SOI)
- ERREXIT("Expected SOI marker first");
-
- /* Scan miscellaneous markers until we reach SOS. */
- for (;;) {
- marker = next_marker();
- switch (marker) {
- /* Note that marker codes 0xC4, 0xC8, 0xCC are not, and must not be,
- * treated as SOFn. C4 in particular is actually DHT.
- */
- case M_SOF0: /* Baseline */
- case M_SOF1: /* Extended sequential, Huffman */
- case M_SOF2: /* Progressive, Huffman */
- case M_SOF3: /* Lossless, Huffman */
- case M_SOF5: /* Differential sequential, Huffman */
- case M_SOF6: /* Differential progressive, Huffman */
- case M_SOF7: /* Differential lossless, Huffman */
- case M_SOF9: /* Extended sequential, arithmetic */
- case M_SOF10: /* Progressive, arithmetic */
- case M_SOF11: /* Lossless, arithmetic */
- case M_SOF13: /* Differential sequential, arithmetic */
- case M_SOF14: /* Differential progressive, arithmetic */
- case M_SOF15: /* Differential lossless, arithmetic */
- if (verbose)
- process_SOFn(marker);
- else
- skip_variable();
- break;
-
- case M_SOS: /* stop before hitting compressed data */
- return marker;
-
- case M_EOI: /* in case it's a tables-only JPEG stream */
- return marker;
-
- case M_COM:
- process_COM();
- break;
-
- case M_APP12:
- /* Some digital camera makers put useful textual information into
- * APP12 markers, so we print those out too when in -verbose mode.
- */
- if (verbose) {
- printf("APP12 contains:\n");
- process_COM();
- } else
- skip_variable();
- break;
-
- default: /* Anything else just gets skipped */
- skip_variable(); /* we assume it has a parameter count... */
- break;
- }
- } /* end loop */
-}
-
-
-/* Command line parsing code */
-
-static const char * progname; /* program name for error messages */
-
-
-static void
-usage (void)
-/* complain about bad command line */
-{
- fprintf(stderr, "rdjpgcom displays any textual comments in a JPEG file.\n");
-
- fprintf(stderr, "Usage: %s [switches] [inputfile]\n", progname);
-
- fprintf(stderr, "Switches (names may be abbreviated):\n");
- fprintf(stderr, " -verbose Also display dimensions of JPEG image\n");
-
- exit(EXIT_FAILURE);
-}
-
-
-static int
-keymatch (char * arg, const char * keyword, int minchars)
-/* Case-insensitive matching of (possibly abbreviated) keyword switches. */
-/* keyword is the constant keyword (must be lower case already), */
-/* minchars is length of minimum legal abbreviation. */
-{
- register int ca, ck;
- register int nmatched = 0;
-
- while ((ca = *arg++) != '\0') {
- if ((ck = *keyword++) == '\0')
- return 0; /* arg longer than keyword, no good */
- if (isupper(ca)) /* force arg to lcase (assume ck is already) */
- ca = tolower(ca);
- if (ca != ck)
- return 0; /* no good */
- nmatched++; /* count matched characters */
- }
- /* reached end of argument; fail if it's too short for unique abbrev */
- if (nmatched < minchars)
- return 0;
- return 1; /* A-OK */
-}
-
-
-/*
- * The main program.
- */
-
-int
-main (int argc, char **argv)
-{
- int argn;
- char * arg;
- int verbose = 0;
-
- /* On Mac, fetch a command line. */
-#ifdef USE_CCOMMAND
- argc = ccommand(&argv);
-#endif
-
- progname = argv[0];
- if (progname == NULL || progname[0] == 0)
- progname = "rdjpgcom"; /* in case C library doesn't provide it */
-
- /* Parse switches, if any */
- for (argn = 1; argn < argc; argn++) {
- arg = argv[argn];
- if (arg[0] != '-')
- break; /* not switch, must be file name */
- arg++; /* advance over '-' */
- if (keymatch(arg, "verbose", 1)) {
- verbose++;
- } else
- usage();
- }
-
- /* Open the input file. */
- /* Unix style: expect zero or one file name */
- if (argn < argc-1) {
- fprintf(stderr, "%s: only one input file\n", progname);
- usage();
- }
- if (argn < argc) {
- if ((infile = fopen(argv[argn], READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default input file is stdin */
-#ifdef USE_SETMODE /* need to hack file mode? */
- setmode(fileno(stdin), O_BINARY);
-#endif
-#ifdef USE_FDOPEN /* need to re-open in binary mode? */
- if ((infile = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open stdin\n", progname);
- exit(EXIT_FAILURE);
- }
-#else
- infile = stdin;
-#endif
- }
-
- /* Scan the JPEG headers. */
- (void) scan_JPEG_header(verbose);
-
- /* All done. */
- exit(EXIT_SUCCESS);
- return 0; /* suppress no-return-value warnings */
-}
+++ /dev/null
-/*
- * rdppm.c
- *
- * Copyright (C) 1991-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to read input images in PPM/PGM format.
- * The extended 2-byte-per-sample raw PPM/PGM formats are supported.
- * The PBMPLUS library is NOT required to compile this software
- * (but it is highly useful as a set of PPM image manipulation programs).
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume input from
- * an ordinary stdio stream. They further assume that reading begins
- * at the start of the file; start_input may need work if the
- * user interface has already read some data (e.g., to determine that
- * the file is indeed PPM format).
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef PPM_SUPPORTED
-
-
-/* Portions of this code are based on the PBMPLUS library, which is:
-**
-** Copyright (C) 1988 by Jef Poskanzer.
-**
-** Permission to use, copy, modify, and distribute this software and its
-** documentation for any purpose and without fee is hereby granted, provided
-** that the above copyright notice appear in all copies and that both that
-** copyright notice and this permission notice appear in supporting
-** documentation. This software is provided "as is" without express or
-** implied warranty.
-*/
-
-
-/* Macros to deal with unsigned chars as efficiently as compiler allows */
-
-#ifdef HAVE_UNSIGNED_CHAR
-typedef unsigned char U_CHAR;
-#define UCH(x) ((int) (x))
-#else /* !HAVE_UNSIGNED_CHAR */
-#ifdef CHAR_IS_UNSIGNED
-typedef char U_CHAR;
-#define UCH(x) ((int) (x))
-#else
-typedef char U_CHAR;
-#define UCH(x) ((int) (x) & 0xFF)
-#endif
-#endif /* HAVE_UNSIGNED_CHAR */
-
-
-#define ReadOK(file,buffer,len) (JFREAD(file,buffer,len) == ((size_t) (len)))
-
-
-/*
- * On most systems, reading individual bytes with getc() is drastically less
- * efficient than buffering a row at a time with fread(). On PCs, we must
- * allocate the buffer in near data space, because we are assuming small-data
- * memory model, wherein fread() can't reach far memory. If you need to
- * process very wide images on a PC, you might have to compile in large-memory
- * model, or else replace fread() with a getc() loop --- which will be much
- * slower.
- */
-
-
-/* Private version of data source object */
-
-typedef struct {
- struct cjpeg_source_struct pub; /* public fields */
-
- U_CHAR *iobuffer; /* non-FAR pointer to I/O buffer */
- JSAMPROW pixrow; /* FAR pointer to same */
- size_t buffer_width; /* width of I/O buffer */
- JSAMPLE *rescale; /* => maxval-remapping array, or NULL */
-} ppm_source_struct;
-
-typedef ppm_source_struct * ppm_source_ptr;
-
-
-LOCAL(int)
-pbm_getc (FILE * infile)
-/* Read next char, skipping over any comments */
-/* A comment/newline sequence is returned as a newline */
-{
- register int ch;
-
- ch = getc(infile);
- if (ch == '#') {
- do {
- ch = getc(infile);
- } while (ch != '\n' && ch != EOF);
- }
- return ch;
-}
-
-
-LOCAL(unsigned int)
-read_pbm_integer (j_compress_ptr cinfo, FILE * infile)
-/* Read an unsigned decimal integer from the PPM file */
-/* Swallows one trailing character after the integer */
-/* Note that on a 16-bit-int machine, only values up to 64k can be read. */
-/* This should not be a problem in practice. */
-{
- register int ch;
- register unsigned int val;
-
- /* Skip any leading whitespace */
- do {
- ch = pbm_getc(infile);
- if (ch == EOF)
- ERREXIT(cinfo, JERR_INPUT_EOF);
- } while (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r');
-
- if (ch < '0' || ch > '9')
- ERREXIT(cinfo, JERR_PPM_NONNUMERIC);
-
- val = ch - '0';
- while ((ch = pbm_getc(infile)) >= '0' && ch <= '9') {
- val *= 10;
- val += ch - '0';
- }
- return val;
-}
-
-
-/*
- * Read one row of pixels.
- *
- * We provide several different versions depending on input file format.
- * In all cases, input is scaled to the size of JSAMPLE.
- *
- * A really fast path is provided for reading byte/sample raw files with
- * maxval = MAXJSAMPLE, which is the normal case for 8-bit data.
- */
-
-
-METHODDEF(JDIMENSION)
-get_text_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading text-format PGM files with any maxval */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- FILE * infile = source->pub.input_file;
- register JSAMPROW ptr;
- register JSAMPLE *rescale = source->rescale;
- JDIMENSION col;
-
- ptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- *ptr++ = rescale[read_pbm_integer(cinfo, infile)];
- }
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_text_rgb_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading text-format PPM files with any maxval */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- FILE * infile = source->pub.input_file;
- register JSAMPROW ptr;
- register JSAMPLE *rescale = source->rescale;
- JDIMENSION col;
-
- ptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- *ptr++ = rescale[read_pbm_integer(cinfo, infile)];
- *ptr++ = rescale[read_pbm_integer(cinfo, infile)];
- *ptr++ = rescale[read_pbm_integer(cinfo, infile)];
- }
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_scaled_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading raw-byte-format PGM files with any maxval */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- register JSAMPROW ptr;
- register U_CHAR * bufferptr;
- register JSAMPLE *rescale = source->rescale;
- JDIMENSION col;
-
- if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- ptr = source->pub.buffer[0];
- bufferptr = source->iobuffer;
- for (col = cinfo->image_width; col > 0; col--) {
- *ptr++ = rescale[UCH(*bufferptr++)];
- }
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_scaled_rgb_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading raw-byte-format PPM files with any maxval */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- register JSAMPROW ptr;
- register U_CHAR * bufferptr;
- register JSAMPLE *rescale = source->rescale;
- JDIMENSION col;
-
- if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- ptr = source->pub.buffer[0];
- bufferptr = source->iobuffer;
- for (col = cinfo->image_width; col > 0; col--) {
- *ptr++ = rescale[UCH(*bufferptr++)];
- *ptr++ = rescale[UCH(*bufferptr++)];
- *ptr++ = rescale[UCH(*bufferptr++)];
- }
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_raw_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading raw-byte-format files with maxval = MAXJSAMPLE.
- * In this case we just read right into the JSAMPLE buffer!
- * Note that same code works for PPM and PGM files.
- */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
-
- if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_word_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading raw-word-format PGM files with any maxval */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- register JSAMPROW ptr;
- register U_CHAR * bufferptr;
- register JSAMPLE *rescale = source->rescale;
- JDIMENSION col;
-
- if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- ptr = source->pub.buffer[0];
- bufferptr = source->iobuffer;
- for (col = cinfo->image_width; col > 0; col--) {
- register int temp;
- temp = UCH(*bufferptr++);
- temp |= UCH(*bufferptr++) << 8;
- *ptr++ = rescale[temp];
- }
- return 1;
-}
-
-
-METHODDEF(JDIMENSION)
-get_word_rgb_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading raw-word-format PPM files with any maxval */
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- register JSAMPROW ptr;
- register U_CHAR * bufferptr;
- register JSAMPLE *rescale = source->rescale;
- JDIMENSION col;
-
- if (! ReadOK(source->pub.input_file, source->iobuffer, source->buffer_width))
- ERREXIT(cinfo, JERR_INPUT_EOF);
- ptr = source->pub.buffer[0];
- bufferptr = source->iobuffer;
- for (col = cinfo->image_width; col > 0; col--) {
- register int temp;
- temp = UCH(*bufferptr++);
- temp |= UCH(*bufferptr++) << 8;
- *ptr++ = rescale[temp];
- temp = UCH(*bufferptr++);
- temp |= UCH(*bufferptr++) << 8;
- *ptr++ = rescale[temp];
- temp = UCH(*bufferptr++);
- temp |= UCH(*bufferptr++) << 8;
- *ptr++ = rescale[temp];
- }
- return 1;
-}
-
-
-/*
- * Read the file header; return image size and component count.
- */
-
-METHODDEF(void)
-start_input_ppm (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- ppm_source_ptr source = (ppm_source_ptr) sinfo;
- int c;
- unsigned int w, h, maxval;
- boolean need_iobuffer, use_raw_buffer, need_rescale;
-
- if (getc(source->pub.input_file) != 'P')
- ERREXIT(cinfo, JERR_PPM_NOT);
-
- c = getc(source->pub.input_file); /* subformat discriminator character */
-
- /* detect unsupported variants (ie, PBM) before trying to read header */
- switch (c) {
- case '2': /* it's a text-format PGM file */
- case '3': /* it's a text-format PPM file */
- case '5': /* it's a raw-format PGM file */
- case '6': /* it's a raw-format PPM file */
- break;
- default:
- ERREXIT(cinfo, JERR_PPM_NOT);
- break;
- }
-
- /* fetch the remaining header info */
- w = read_pbm_integer(cinfo, source->pub.input_file);
- h = read_pbm_integer(cinfo, source->pub.input_file);
- maxval = read_pbm_integer(cinfo, source->pub.input_file);
-
- if (w <= 0 || h <= 0 || maxval <= 0) /* error check */
- ERREXIT(cinfo, JERR_PPM_NOT);
-
- cinfo->data_precision = BITS_IN_JSAMPLE; /* we always rescale data to this */
- cinfo->image_width = (JDIMENSION) w;
- cinfo->image_height = (JDIMENSION) h;
-
- /* initialize flags to most common settings */
- need_iobuffer = TRUE; /* do we need an I/O buffer? */
- use_raw_buffer = FALSE; /* do we map input buffer onto I/O buffer? */
- need_rescale = TRUE; /* do we need a rescale array? */
-
- switch (c) {
- case '2': /* it's a text-format PGM file */
- cinfo->input_components = 1;
- cinfo->in_color_space = JCS_GRAYSCALE;
- TRACEMS2(cinfo, 1, JTRC_PGM_TEXT, w, h);
- source->pub.get_pixel_rows = get_text_gray_row;
- need_iobuffer = FALSE;
- break;
-
- case '3': /* it's a text-format PPM file */
- cinfo->input_components = 3;
- cinfo->in_color_space = JCS_RGB;
- TRACEMS2(cinfo, 1, JTRC_PPM_TEXT, w, h);
- source->pub.get_pixel_rows = get_text_rgb_row;
- need_iobuffer = FALSE;
- break;
-
- case '5': /* it's a raw-format PGM file */
- cinfo->input_components = 1;
- cinfo->in_color_space = JCS_GRAYSCALE;
- TRACEMS2(cinfo, 1, JTRC_PGM, w, h);
- if (maxval > 255) {
- source->pub.get_pixel_rows = get_word_gray_row;
- } else if (maxval == MAXJSAMPLE && SIZEOF(JSAMPLE) == SIZEOF(U_CHAR)) {
- source->pub.get_pixel_rows = get_raw_row;
- use_raw_buffer = TRUE;
- need_rescale = FALSE;
- } else {
- source->pub.get_pixel_rows = get_scaled_gray_row;
- }
- break;
-
- case '6': /* it's a raw-format PPM file */
- cinfo->input_components = 3;
- cinfo->in_color_space = JCS_RGB;
- TRACEMS2(cinfo, 1, JTRC_PPM, w, h);
- if (maxval > 255) {
- source->pub.get_pixel_rows = get_word_rgb_row;
- } else if (maxval == MAXJSAMPLE && SIZEOF(JSAMPLE) == SIZEOF(U_CHAR)) {
- source->pub.get_pixel_rows = get_raw_row;
- use_raw_buffer = TRUE;
- need_rescale = FALSE;
- } else {
- source->pub.get_pixel_rows = get_scaled_rgb_row;
- }
- break;
- }
-
- /* Allocate space for I/O buffer: 1 or 3 bytes or words/pixel. */
- if (need_iobuffer) {
- source->buffer_width = (size_t) w * cinfo->input_components *
- ((maxval<=255) ? SIZEOF(U_CHAR) : (2*SIZEOF(U_CHAR)));
- source->iobuffer = (U_CHAR *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- source->buffer_width);
- }
-
- /* Create compressor input buffer. */
- if (use_raw_buffer) {
- /* For unscaled raw-input case, we can just map it onto the I/O buffer. */
- /* Synthesize a JSAMPARRAY pointer structure */
- /* Cast here implies near->far pointer conversion on PCs */
- source->pixrow = (JSAMPROW) source->iobuffer;
- source->pub.buffer = & source->pixrow;
- source->pub.buffer_height = 1;
- } else {
- /* Need to translate anyway, so make a separate sample buffer. */
- source->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (JDIMENSION) w * cinfo->input_components, (JDIMENSION) 1);
- source->pub.buffer_height = 1;
- }
-
- /* Compute the rescaling array if required. */
- if (need_rescale) {
- INT32 val, half_maxval;
-
- /* On 16-bit-int machines we have to be careful of maxval = 65535 */
- source->rescale = (JSAMPLE *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (size_t) (((long) maxval + 1L) * SIZEOF(JSAMPLE)));
- half_maxval = maxval / 2;
- for (val = 0; val <= (INT32) maxval; val++) {
- /* The multiplication here must be done in 32 bits to avoid overflow */
- source->rescale[val] = (JSAMPLE) ((val*MAXJSAMPLE + half_maxval)/maxval);
- }
- }
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_input_ppm (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- /* no work */
-}
-
-
-/*
- * The module selection routine for PPM format input.
- */
-
-GLOBAL(cjpeg_source_ptr)
-jinit_read_ppm (j_compress_ptr cinfo)
-{
- ppm_source_ptr source;
-
- /* Create module interface object */
- source = (ppm_source_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(ppm_source_struct));
- /* Fill in method ptrs, except get_pixel_rows which start_input sets */
- source->pub.start_input = start_input_ppm;
- source->pub.finish_input = finish_input_ppm;
-
- return (cjpeg_source_ptr) source;
-}
-
-#endif /* PPM_SUPPORTED */
+++ /dev/null
-/*
- * rdrle.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to read input images in Utah RLE format.
- * The Utah Raster Toolkit library is required (version 3.1 or later).
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume input from
- * an ordinary stdio stream. They further assume that reading begins
- * at the start of the file; start_input may need work if the
- * user interface has already read some data (e.g., to determine that
- * the file is indeed RLE format).
- *
- * Based on code contributed by Mike Lijewski,
- * with updates from Robert Hutchinson.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef RLE_SUPPORTED
-
-/* rle.h is provided by the Utah Raster Toolkit. */
-
-#include <rle.h>
-
-/*
- * We assume that JSAMPLE has the same representation as rle_pixel,
- * to wit, "unsigned char". Hence we can't cope with 12- or 16-bit samples.
- */
-
-#if BITS_IN_JSAMPLE != 8
- Sorry, this code only copes with 8-bit JSAMPLEs. /* deliberate syntax err */
-#endif
-
-/*
- * We support the following types of RLE files:
- *
- * GRAYSCALE - 8 bits, no colormap
- * MAPPEDGRAY - 8 bits, 1 channel colomap
- * PSEUDOCOLOR - 8 bits, 3 channel colormap
- * TRUECOLOR - 24 bits, 3 channel colormap
- * DIRECTCOLOR - 24 bits, no colormap
- *
- * For now, we ignore any alpha channel in the image.
- */
-
-typedef enum
- { GRAYSCALE, MAPPEDGRAY, PSEUDOCOLOR, TRUECOLOR, DIRECTCOLOR } rle_kind;
-
-
-/*
- * Since RLE stores scanlines bottom-to-top, we have to invert the image
- * to conform to JPEG's top-to-bottom order. To do this, we read the
- * incoming image into a virtual array on the first get_pixel_rows call,
- * then fetch the required row from the virtual array on subsequent calls.
- */
-
-typedef struct _rle_source_struct * rle_source_ptr;
-
-typedef struct _rle_source_struct {
- struct cjpeg_source_struct pub; /* public fields */
-
- rle_kind visual; /* actual type of input file */
- jvirt_sarray_ptr image; /* virtual array to hold the image */
- JDIMENSION row; /* current row # in the virtual array */
- rle_hdr header; /* Input file information */
- rle_pixel** rle_row; /* holds a row returned by rle_getrow() */
-
-} rle_source_struct;
-
-
-/*
- * Read the file header; return image size and component count.
- */
-
-METHODDEF(void)
-start_input_rle (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- rle_source_ptr source = (rle_source_ptr) sinfo;
- JDIMENSION width, height;
-#ifdef PROGRESS_REPORT
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-#endif
-
- /* Use RLE library routine to get the header info */
- source->header = *rle_hdr_init(NULL);
- source->header.rle_file = source->pub.input_file;
- switch (rle_get_setup(&(source->header))) {
- case RLE_SUCCESS:
- /* A-OK */
- break;
- case RLE_NOT_RLE:
- ERREXIT(cinfo, JERR_RLE_NOT);
- break;
- case RLE_NO_SPACE:
- ERREXIT(cinfo, JERR_RLE_MEM);
- break;
- case RLE_EMPTY:
- ERREXIT(cinfo, JERR_RLE_EMPTY);
- break;
- case RLE_EOF:
- ERREXIT(cinfo, JERR_RLE_EOF);
- break;
- default:
- ERREXIT(cinfo, JERR_RLE_BADERROR);
- break;
- }
-
- /* Figure out what we have, set private vars and return values accordingly */
-
- width = source->header.xmax - source->header.xmin + 1;
- height = source->header.ymax - source->header.ymin + 1;
- source->header.xmin = 0; /* realign horizontally */
- source->header.xmax = width-1;
-
- cinfo->image_width = width;
- cinfo->image_height = height;
- cinfo->data_precision = 8; /* we can only handle 8 bit data */
-
- if (source->header.ncolors == 1 && source->header.ncmap == 0) {
- source->visual = GRAYSCALE;
- TRACEMS2(cinfo, 1, JTRC_RLE_GRAY, width, height);
- } else if (source->header.ncolors == 1 && source->header.ncmap == 1) {
- source->visual = MAPPEDGRAY;
- TRACEMS3(cinfo, 1, JTRC_RLE_MAPGRAY, width, height,
- 1 << source->header.cmaplen);
- } else if (source->header.ncolors == 1 && source->header.ncmap == 3) {
- source->visual = PSEUDOCOLOR;
- TRACEMS3(cinfo, 1, JTRC_RLE_MAPPED, width, height,
- 1 << source->header.cmaplen);
- } else if (source->header.ncolors == 3 && source->header.ncmap == 3) {
- source->visual = TRUECOLOR;
- TRACEMS3(cinfo, 1, JTRC_RLE_FULLMAP, width, height,
- 1 << source->header.cmaplen);
- } else if (source->header.ncolors == 3 && source->header.ncmap == 0) {
- source->visual = DIRECTCOLOR;
- TRACEMS2(cinfo, 1, JTRC_RLE, width, height);
- } else
- ERREXIT(cinfo, JERR_RLE_UNSUPPORTED);
-
- if (source->visual == GRAYSCALE || source->visual == MAPPEDGRAY) {
- cinfo->in_color_space = JCS_GRAYSCALE;
- cinfo->input_components = 1;
- } else {
- cinfo->in_color_space = JCS_RGB;
- cinfo->input_components = 3;
- }
-
- /*
- * A place to hold each scanline while it's converted.
- * (GRAYSCALE scanlines don't need converting)
- */
- if (source->visual != GRAYSCALE) {
- source->rle_row = (rle_pixel**) (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (JDIMENSION) width, (JDIMENSION) cinfo->input_components);
- }
-
- /* request a virtual array to hold the image */
- source->image = (*cinfo->mem->request_virt_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
- (JDIMENSION) (width * source->header.ncolors),
- (JDIMENSION) height, (JDIMENSION) 1);
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- /* count file input as separate pass */
- progress->total_extra_passes++;
- }
-#endif
-
- source->pub.buffer_height = 1;
-}
-
-
-/*
- * Read one row of pixels.
- * Called only after load_image has read the image into the virtual array.
- * Used for GRAYSCALE, MAPPEDGRAY, TRUECOLOR, and DIRECTCOLOR images.
- */
-
-METHODDEF(JDIMENSION)
-get_rle_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- rle_source_ptr source = (rle_source_ptr) sinfo;
-
- source->row--;
- source->pub.buffer = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->image, source->row, (JDIMENSION) 1, FALSE);
-
- return 1;
-}
-
-/*
- * Read one row of pixels.
- * Called only after load_image has read the image into the virtual array.
- * Used for PSEUDOCOLOR images.
- */
-
-METHODDEF(JDIMENSION)
-get_pseudocolor_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- rle_source_ptr source = (rle_source_ptr) sinfo;
- JSAMPROW src_row, dest_row;
- JDIMENSION col;
- rle_map *colormap;
- int val;
-
- colormap = source->header.cmap;
- dest_row = source->pub.buffer[0];
- source->row--;
- src_row = * (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->image, source->row, (JDIMENSION) 1, FALSE);
-
- for (col = cinfo->image_width; col > 0; col--) {
- val = GETJSAMPLE(*src_row++);
- *dest_row++ = (JSAMPLE) (colormap[val ] >> 8);
- *dest_row++ = (JSAMPLE) (colormap[val + 256] >> 8);
- *dest_row++ = (JSAMPLE) (colormap[val + 512] >> 8);
- }
-
- return 1;
-}
-
-
-/*
- * Load the image into a virtual array. We have to do this because RLE
- * files start at the lower left while the JPEG standard has them starting
- * in the upper left. This is called the first time we want to get a row
- * of input. What we do is load the RLE data into the array and then call
- * the appropriate routine to read one row from the array. Before returning,
- * we set source->pub.get_pixel_rows so that subsequent calls go straight to
- * the appropriate row-reading routine.
- */
-
-METHODDEF(JDIMENSION)
-load_image (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- rle_source_ptr source = (rle_source_ptr) sinfo;
- JDIMENSION row, col;
- JSAMPROW scanline, red_ptr, green_ptr, blue_ptr;
- rle_pixel **rle_row;
- rle_map *colormap;
- char channel;
-#ifdef PROGRESS_REPORT
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-#endif
-
- colormap = source->header.cmap;
- rle_row = source->rle_row;
-
- /* Read the RLE data into our virtual array.
- * We assume here that (a) rle_pixel is represented the same as JSAMPLE,
- * and (b) we are not on a machine where FAR pointers differ from regular.
- */
- RLE_CLR_BIT(source->header, RLE_ALPHA); /* don't read the alpha channel */
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_limit = cinfo->image_height;
- progress->pub.pass_counter = 0;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
-
- switch (source->visual) {
-
- case GRAYSCALE:
- case PSEUDOCOLOR:
- for (row = 0; row < cinfo->image_height; row++) {
- rle_row = (rle_pixel **) (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->image, row, (JDIMENSION) 1, TRUE);
- rle_getrow(&source->header, rle_row);
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_counter++;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
- }
- break;
-
- case MAPPEDGRAY:
- case TRUECOLOR:
- for (row = 0; row < cinfo->image_height; row++) {
- scanline = * (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->image, row, (JDIMENSION) 1, TRUE);
- rle_row = source->rle_row;
- rle_getrow(&source->header, rle_row);
-
- for (col = 0; col < cinfo->image_width; col++) {
- for (channel = 0; channel < source->header.ncolors; channel++) {
- *scanline++ = (JSAMPLE)
- (colormap[GETJSAMPLE(rle_row[channel][col]) + 256 * channel] >> 8);
- }
- }
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_counter++;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
- }
- break;
-
- case DIRECTCOLOR:
- for (row = 0; row < cinfo->image_height; row++) {
- scanline = * (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->image, row, (JDIMENSION) 1, TRUE);
- rle_getrow(&source->header, rle_row);
-
- red_ptr = rle_row[0];
- green_ptr = rle_row[1];
- blue_ptr = rle_row[2];
-
- for (col = cinfo->image_width; col > 0; col--) {
- *scanline++ = *red_ptr++;
- *scanline++ = *green_ptr++;
- *scanline++ = *blue_ptr++;
- }
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_counter++;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
- }
- }
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL)
- progress->completed_extra_passes++;
-#endif
-
- /* Set up to call proper row-extraction routine in future */
- if (source->visual == PSEUDOCOLOR) {
- source->pub.buffer = source->rle_row;
- source->pub.get_pixel_rows = get_pseudocolor_row;
- } else {
- source->pub.get_pixel_rows = get_rle_row;
- }
- source->row = cinfo->image_height;
-
- /* And fetch the topmost (bottommost) row */
- return (*source->pub.get_pixel_rows) (cinfo, sinfo);
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_input_rle (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- /* no work */
-}
-
-
-/*
- * The module selection routine for RLE format input.
- */
-
-GLOBAL(cjpeg_source_ptr)
-jinit_read_rle (j_compress_ptr cinfo)
-{
- rle_source_ptr source;
-
- /* Create module interface object */
- source = (rle_source_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(rle_source_struct));
- /* Fill in method ptrs */
- source->pub.start_input = start_input_rle;
- source->pub.finish_input = finish_input_rle;
- source->pub.get_pixel_rows = load_image;
-
- return (cjpeg_source_ptr) source;
-}
-
-#endif /* RLE_SUPPORTED */
+++ /dev/null
-/*
- * rdswitch.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to process some of cjpeg's more complicated
- * command-line switches. Switches processed here are:
- * -qtables file Read quantization tables from text file
- * -scans file Read scan script from text file
- * -qslots N[,N,...] Set component quantization table selectors
- * -sample HxV[,HxV,...] Set component sampling factors
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-#include <ctype.h> /* to declare isdigit(), isspace() */
-
-
-LOCAL(int)
-text_getc (FILE * file)
-/* Read next char, skipping over any comments (# to end of line) */
-/* A comment/newline sequence is returned as a newline */
-{
- register int ch;
-
- ch = getc(file);
- if (ch == '#') {
- do {
- ch = getc(file);
- } while (ch != '\n' && ch != EOF);
- }
- return ch;
-}
-
-
-LOCAL(boolean)
-read_text_integer (FILE * file, long * result, int * termchar)
-/* Read an unsigned decimal integer from a file, store it in result */
-/* Reads one trailing character after the integer; returns it in termchar */
-{
- register int ch;
- register long val;
-
- /* Skip any leading whitespace, detect EOF */
- do {
- ch = text_getc(file);
- if (ch == EOF) {
- *termchar = ch;
- return FALSE;
- }
- } while (isspace(ch));
-
- if (! isdigit(ch)) {
- *termchar = ch;
- return FALSE;
- }
-
- val = ch - '0';
- while ((ch = text_getc(file)) != EOF) {
- if (! isdigit(ch))
- break;
- val *= 10;
- val += ch - '0';
- }
- *result = val;
- *termchar = ch;
- return TRUE;
-}
-
-
-GLOBAL(boolean)
-read_quant_tables (j_compress_ptr cinfo, char * filename,
- int scale_factor, boolean force_baseline)
-/* Read a set of quantization tables from the specified file.
- * The file is plain ASCII text: decimal numbers with whitespace between.
- * Comments preceded by '#' may be included in the file.
- * There may be one to NUM_QUANT_TBLS tables in the file, each of 64 values.
- * The tables are implicitly numbered 0,1,etc.
- * NOTE: does not affect the qslots mapping, which will default to selecting
- * table 0 for luminance (or primary) components, 1 for chrominance components.
- * You must use -qslots if you want a different component->table mapping.
- */
-{
- FILE * fp;
- int tblno, i, termchar;
- long val;
- unsigned int table[DCTSIZE2];
-
- if ((fp = fopen(filename, "r")) == NULL) {
- fprintf(stderr, "Can't open table file %s\n", filename);
- return FALSE;
- }
- tblno = 0;
-
- while (read_text_integer(fp, &val, &termchar)) { /* read 1st element of table */
- if (tblno >= NUM_QUANT_TBLS) {
- fprintf(stderr, "Too many tables in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
- table[0] = (unsigned int) val;
- for (i = 1; i < DCTSIZE2; i++) {
- if (! read_text_integer(fp, &val, &termchar)) {
- fprintf(stderr, "Invalid table data in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
- table[i] = (unsigned int) val;
- }
- jpeg_add_quant_table(cinfo, tblno, table, scale_factor, force_baseline);
- tblno++;
- }
-
- if (termchar != EOF) {
- fprintf(stderr, "Non-numeric data in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
-
- fclose(fp);
- return TRUE;
-}
-
-
-#ifdef C_MULTISCAN_FILES_SUPPORTED
-
-LOCAL(boolean)
-read_scan_integer (FILE * file, long * result, int * termchar)
-/* Variant of read_text_integer that always looks for a non-space termchar;
- * this simplifies parsing of punctuation in scan scripts.
- */
-{
- register int ch;
-
- if (! read_text_integer(file, result, termchar))
- return FALSE;
- ch = *termchar;
- while (ch != EOF && isspace(ch))
- ch = text_getc(file);
- if (isdigit(ch)) { /* oops, put it back */
- if (ungetc(ch, file) == EOF)
- return FALSE;
- ch = ' ';
- } else {
- /* Any separators other than ';' and ':' are ignored;
- * this allows user to insert commas, etc, if desired.
- */
- if (ch != EOF && ch != ';' && ch != ':')
- ch = ' ';
- }
- *termchar = ch;
- return TRUE;
-}
-
-
-GLOBAL(boolean)
-read_scan_script (j_compress_ptr cinfo, char * filename)
-/* Read a scan script from the specified text file.
- * Each entry in the file defines one scan to be emitted.
- * Entries are separated by semicolons ';'.
- * An entry contains one to four component indexes,
- * optionally followed by a colon ':' and four progressive-JPEG parameters.
- * The component indexes denote which component(s) are to be transmitted
- * in the current scan. The first component has index 0.
- * Sequential JPEG is used if the progressive-JPEG parameters are omitted.
- * The file is free format text: any whitespace may appear between numbers
- * and the ':' and ';' punctuation marks. Also, other punctuation (such
- * as commas or dashes) can be placed between numbers if desired.
- * Comments preceded by '#' may be included in the file.
- * Note: we do very little validity checking here;
- * jcmaster.c will validate the script parameters.
- */
-{
- FILE * fp;
- int scanno, ncomps, termchar;
- long val;
- jpeg_scan_info * scanptr;
-#define MAX_SCANS 100 /* quite arbitrary limit */
- jpeg_scan_info scans[MAX_SCANS];
-
- if ((fp = fopen(filename, "r")) == NULL) {
- fprintf(stderr, "Can't open scan definition file %s\n", filename);
- return FALSE;
- }
- scanptr = scans;
- scanno = 0;
-
- while (read_scan_integer(fp, &val, &termchar)) {
- if (scanno >= MAX_SCANS) {
- fprintf(stderr, "Too many scans defined in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
- scanptr->component_index[0] = (int) val;
- ncomps = 1;
- while (termchar == ' ') {
- if (ncomps >= MAX_COMPS_IN_SCAN) {
- fprintf(stderr, "Too many components in one scan in file %s\n",
- filename);
- fclose(fp);
- return FALSE;
- }
- if (! read_scan_integer(fp, &val, &termchar))
- goto bogus;
- scanptr->component_index[ncomps] = (int) val;
- ncomps++;
- }
- scanptr->comps_in_scan = ncomps;
- if (termchar == ':') {
- if (! read_scan_integer(fp, &val, &termchar) || termchar != ' ')
- goto bogus;
- scanptr->Ss = (int) val;
- if (! read_scan_integer(fp, &val, &termchar) || termchar != ' ')
- goto bogus;
- scanptr->Se = (int) val;
- if (! read_scan_integer(fp, &val, &termchar) || termchar != ' ')
- goto bogus;
- scanptr->Ah = (int) val;
- if (! read_scan_integer(fp, &val, &termchar))
- goto bogus;
- scanptr->Al = (int) val;
- } else {
- /* set non-progressive parameters */
- scanptr->Ss = 0;
- scanptr->Se = DCTSIZE2-1;
- scanptr->Ah = 0;
- scanptr->Al = 0;
- }
- if (termchar != ';' && termchar != EOF) {
-bogus:
- fprintf(stderr, "Invalid scan entry format in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
- scanptr++, scanno++;
- }
-
- if (termchar != EOF) {
- fprintf(stderr, "Non-numeric data in file %s\n", filename);
- fclose(fp);
- return FALSE;
- }
-
- if (scanno > 0) {
- /* Stash completed scan list in cinfo structure.
- * NOTE: for cjpeg's use, JPOOL_IMAGE is the right lifetime for this data,
- * but if you want to compress multiple images you'd want JPOOL_PERMANENT.
- */
- scanptr = (jpeg_scan_info *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- scanno * SIZEOF(jpeg_scan_info));
- MEMCOPY(scanptr, scans, scanno * SIZEOF(jpeg_scan_info));
- cinfo->scan_info = scanptr;
- cinfo->num_scans = scanno;
- }
-
- fclose(fp);
- return TRUE;
-}
-
-#endif /* C_MULTISCAN_FILES_SUPPORTED */
-
-
-GLOBAL(boolean)
-set_quant_slots (j_compress_ptr cinfo, char *arg)
-/* Process a quantization-table-selectors parameter string, of the form
- * N[,N,...]
- * If there are more components than parameters, the last value is replicated.
- */
-{
- int val = 0; /* default table # */
- int ci;
- char ch;
-
- for (ci = 0; ci < MAX_COMPONENTS; ci++) {
- if (*arg) {
- ch = ','; /* if not set by sscanf, will be ',' */
- if (sscanf(arg, "%d%c", &val, &ch) < 1)
- return FALSE;
- if (ch != ',') /* syntax check */
- return FALSE;
- if (val < 0 || val >= NUM_QUANT_TBLS) {
- fprintf(stderr, "JPEG quantization tables are numbered 0..%d\n",
- NUM_QUANT_TBLS-1);
- return FALSE;
- }
- cinfo->comp_info[ci].quant_tbl_no = val;
- while (*arg && *arg++ != ',') /* advance to next segment of arg string */
- ;
- } else {
- /* reached end of parameter, set remaining components to last table */
- cinfo->comp_info[ci].quant_tbl_no = val;
- }
- }
- return TRUE;
-}
-
-
-GLOBAL(boolean)
-set_sample_factors (j_compress_ptr cinfo, char *arg)
-/* Process a sample-factors parameter string, of the form
- * HxV[,HxV,...]
- * If there are more components than parameters, "1x1" is assumed for the rest.
- */
-{
- int ci, val1, val2;
- char ch1, ch2;
-
- for (ci = 0; ci < MAX_COMPONENTS; ci++) {
- if (*arg) {
- ch2 = ','; /* if not set by sscanf, will be ',' */
- if (sscanf(arg, "%d%c%d%c", &val1, &ch1, &val2, &ch2) < 3)
- return FALSE;
- if ((ch1 != 'x' && ch1 != 'X') || ch2 != ',') /* syntax check */
- return FALSE;
- if (val1 <= 0 || val1 > 4 || val2 <= 0 || val2 > 4) {
- fprintf(stderr, "JPEG sampling factors must be 1..4\n");
- return FALSE;
- }
- cinfo->comp_info[ci].h_samp_factor = val1;
- cinfo->comp_info[ci].v_samp_factor = val2;
- while (*arg && *arg++ != ',') /* advance to next segment of arg string */
- ;
- } else {
- /* reached end of parameter, set remaining components to 1x1 sampling */
- cinfo->comp_info[ci].h_samp_factor = 1;
- cinfo->comp_info[ci].v_samp_factor = 1;
- }
- }
- return TRUE;
-}
+++ /dev/null
-/*
- * rdtarga.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to read input images in Targa format.
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume input from
- * an ordinary stdio stream. They further assume that reading begins
- * at the start of the file; start_input may need work if the
- * user interface has already read some data (e.g., to determine that
- * the file is indeed Targa format).
- *
- * Based on code contributed by Lee Daniel Crocker.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef TARGA_SUPPORTED
-
-
-/* Macros to deal with unsigned chars as efficiently as compiler allows */
-
-#ifdef HAVE_UNSIGNED_CHAR
-typedef unsigned char U_CHAR;
-#define UCH(x) ((int) (x))
-#else /* !HAVE_UNSIGNED_CHAR */
-#ifdef CHAR_IS_UNSIGNED
-typedef char U_CHAR;
-#define UCH(x) ((int) (x))
-#else
-typedef char U_CHAR;
-#define UCH(x) ((int) (x) & 0xFF)
-#endif
-#endif /* HAVE_UNSIGNED_CHAR */
-
-
-#define ReadOK(file,buffer,len) (JFREAD(file,buffer,len) == ((size_t) (len)))
-
-
-/* Private version of data source object */
-
-typedef struct _tga_source_struct * tga_source_ptr;
-
-typedef struct _tga_source_struct {
- struct cjpeg_source_struct pub; /* public fields */
-
- j_compress_ptr cinfo; /* back link saves passing separate parm */
-
- JSAMPARRAY colormap; /* Targa colormap (converted to my format) */
-
- jvirt_sarray_ptr whole_image; /* Needed if funny input row order */
- JDIMENSION current_row; /* Current logical row number to read */
-
- /* Pointer to routine to extract next Targa pixel from input file */
- JMETHOD(void, read_pixel, (tga_source_ptr sinfo));
-
- /* Result of read_pixel is delivered here: */
- U_CHAR tga_pixel[4];
-
- int pixel_size; /* Bytes per Targa pixel (1 to 4) */
-
- /* State info for reading RLE-coded pixels; both counts must be init to 0 */
- int block_count; /* # of pixels remaining in RLE block */
- int dup_pixel_count; /* # of times to duplicate previous pixel */
-
- /* This saves the correct pixel-row-expansion method for preload_image */
- JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo,
- cjpeg_source_ptr sinfo));
-} tga_source_struct;
-
-
-/* For expanding 5-bit pixel values to 8-bit with best rounding */
-
-static const UINT8 c5to8bits[32] = {
- 0, 8, 16, 25, 33, 41, 49, 58,
- 66, 74, 82, 90, 99, 107, 115, 123,
- 132, 140, 148, 156, 165, 173, 181, 189,
- 197, 206, 214, 222, 230, 239, 247, 255
-};
-
-
-
-LOCAL(int)
-read_byte (tga_source_ptr sinfo)
-/* Read next byte from Targa file */
-{
- register FILE *infile = sinfo->pub.input_file;
- register int c;
-
- if ((c = getc(infile)) == EOF)
- ERREXIT(sinfo->cinfo, JERR_INPUT_EOF);
- return c;
-}
-
-
-LOCAL(void)
-read_colormap (tga_source_ptr sinfo, int cmaplen, int mapentrysize)
-/* Read the colormap from a Targa file */
-{
- int i;
-
- /* Presently only handles 24-bit BGR format */
- if (mapentrysize != 24)
- ERREXIT(sinfo->cinfo, JERR_TGA_BADCMAP);
-
- for (i = 0; i < cmaplen; i++) {
- sinfo->colormap[2][i] = (JSAMPLE) read_byte(sinfo);
- sinfo->colormap[1][i] = (JSAMPLE) read_byte(sinfo);
- sinfo->colormap[0][i] = (JSAMPLE) read_byte(sinfo);
- }
-}
-
-
-/*
- * read_pixel methods: get a single pixel from Targa file into tga_pixel[]
- */
-
-METHODDEF(void)
-read_non_rle_pixel (tga_source_ptr sinfo)
-/* Read one Targa pixel from the input file; no RLE expansion */
-{
- register FILE *infile = sinfo->pub.input_file;
- register int i;
-
- for (i = 0; i < sinfo->pixel_size; i++) {
- sinfo->tga_pixel[i] = (U_CHAR) getc(infile);
- }
-}
-
-
-METHODDEF(void)
-read_rle_pixel (tga_source_ptr sinfo)
-/* Read one Targa pixel from the input file, expanding RLE data as needed */
-{
- register FILE *infile = sinfo->pub.input_file;
- register int i;
-
- /* Duplicate previously read pixel? */
- if (sinfo->dup_pixel_count > 0) {
- sinfo->dup_pixel_count--;
- return;
- }
-
- /* Time to read RLE block header? */
- if (--sinfo->block_count < 0) { /* decrement pixels remaining in block */
- i = read_byte(sinfo);
- if (i & 0x80) { /* Start of duplicate-pixel block? */
- sinfo->dup_pixel_count = i & 0x7F; /* number of dups after this one */
- sinfo->block_count = 0; /* then read new block header */
- } else {
- sinfo->block_count = i & 0x7F; /* number of pixels after this one */
- }
- }
-
- /* Read next pixel */
- for (i = 0; i < sinfo->pixel_size; i++) {
- sinfo->tga_pixel[i] = (U_CHAR) getc(infile);
- }
-}
-
-
-/*
- * Read one row of pixels.
- *
- * We provide several different versions depending on input file format.
- */
-
-
-METHODDEF(JDIMENSION)
-get_8bit_gray_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading 8-bit grayscale pixels */
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- register JSAMPROW ptr;
- register JDIMENSION col;
-
- ptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- (*source->read_pixel) (source); /* Load next pixel into tga_pixel */
- *ptr++ = (JSAMPLE) UCH(source->tga_pixel[0]);
- }
- return 1;
-}
-
-METHODDEF(JDIMENSION)
-get_8bit_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading 8-bit colormap indexes */
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- register int t;
- register JSAMPROW ptr;
- register JDIMENSION col;
- register JSAMPARRAY colormap = source->colormap;
-
- ptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- (*source->read_pixel) (source); /* Load next pixel into tga_pixel */
- t = UCH(source->tga_pixel[0]);
- *ptr++ = colormap[0][t];
- *ptr++ = colormap[1][t];
- *ptr++ = colormap[2][t];
- }
- return 1;
-}
-
-METHODDEF(JDIMENSION)
-get_16bit_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading 16-bit pixels */
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- register int t;
- register JSAMPROW ptr;
- register JDIMENSION col;
-
- ptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- (*source->read_pixel) (source); /* Load next pixel into tga_pixel */
- t = UCH(source->tga_pixel[0]);
- t += UCH(source->tga_pixel[1]) << 8;
- /* We expand 5 bit data to 8 bit sample width.
- * The format of the 16-bit (LSB first) input word is
- * xRRRRRGGGGGBBBBB
- */
- ptr[2] = (JSAMPLE) c5to8bits[t & 0x1F];
- t >>= 5;
- ptr[1] = (JSAMPLE) c5to8bits[t & 0x1F];
- t >>= 5;
- ptr[0] = (JSAMPLE) c5to8bits[t & 0x1F];
- ptr += 3;
- }
- return 1;
-}
-
-METHODDEF(JDIMENSION)
-get_24bit_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-/* This version is for reading 24-bit pixels */
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- register JSAMPROW ptr;
- register JDIMENSION col;
-
- ptr = source->pub.buffer[0];
- for (col = cinfo->image_width; col > 0; col--) {
- (*source->read_pixel) (source); /* Load next pixel into tga_pixel */
- *ptr++ = (JSAMPLE) UCH(source->tga_pixel[2]); /* change BGR to RGB order */
- *ptr++ = (JSAMPLE) UCH(source->tga_pixel[1]);
- *ptr++ = (JSAMPLE) UCH(source->tga_pixel[0]);
- }
- return 1;
-}
-
-/*
- * Targa also defines a 32-bit pixel format with order B,G,R,A.
- * We presently ignore the attribute byte, so the code for reading
- * these pixels is identical to the 24-bit routine above.
- * This works because the actual pixel length is only known to read_pixel.
- */
-
-#define get_32bit_row get_24bit_row
-
-
-/*
- * This method is for re-reading the input data in standard top-down
- * row order. The entire image has already been read into whole_image
- * with proper conversion of pixel format, but it's in a funny row order.
- */
-
-METHODDEF(JDIMENSION)
-get_memory_row (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- JDIMENSION source_row;
-
- /* Compute row of source that maps to current_row of normal order */
- /* For now, assume image is bottom-up and not interlaced. */
- /* NEEDS WORK to support interlaced images! */
- source_row = cinfo->image_height - source->current_row - 1;
-
- /* Fetch that row from virtual array */
- source->pub.buffer = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->whole_image,
- source_row, (JDIMENSION) 1, FALSE);
-
- source->current_row++;
- return 1;
-}
-
-
-/*
- * This method loads the image into whole_image during the first call on
- * get_pixel_rows. The get_pixel_rows pointer is then adjusted to call
- * get_memory_row on subsequent calls.
- */
-
-METHODDEF(JDIMENSION)
-preload_image (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- JDIMENSION row;
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-
- /* Read the data into a virtual array in input-file row order. */
- for (row = 0; row < cinfo->image_height; row++) {
- if (progress != NULL) {
- progress->pub.pass_counter = (long) row;
- progress->pub.pass_limit = (long) cinfo->image_height;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
- source->pub.buffer = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, source->whole_image, row, (JDIMENSION) 1, TRUE);
- (*source->get_pixel_rows) (cinfo, sinfo);
- }
- if (progress != NULL)
- progress->completed_extra_passes++;
-
- /* Set up to read from the virtual array in unscrambled order */
- source->pub.get_pixel_rows = get_memory_row;
- source->current_row = 0;
- /* And read the first row */
- return get_memory_row(cinfo, sinfo);
-}
-
-
-/*
- * Read the file header; return image size and component count.
- */
-
-METHODDEF(void)
-start_input_tga (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- tga_source_ptr source = (tga_source_ptr) sinfo;
- U_CHAR targaheader[18];
- int idlen, cmaptype, subtype, flags, interlace_type, components;
- unsigned int width, height, maplen;
- boolean is_bottom_up;
-
-#define GET_2B(offset) ((unsigned int) UCH(targaheader[offset]) + \
- (((unsigned int) UCH(targaheader[offset+1])) << 8))
-
- if (! ReadOK(source->pub.input_file, targaheader, 18))
- ERREXIT(cinfo, JERR_INPUT_EOF);
-
- /* Pretend "15-bit" pixels are 16-bit --- we ignore attribute bit anyway */
- if (targaheader[16] == 15)
- targaheader[16] = 16;
-
- idlen = UCH(targaheader[0]);
- cmaptype = UCH(targaheader[1]);
- subtype = UCH(targaheader[2]);
- maplen = GET_2B(5);
- width = GET_2B(12);
- height = GET_2B(14);
- source->pixel_size = UCH(targaheader[16]) >> 3;
- flags = UCH(targaheader[17]); /* Image Descriptor byte */
-
- is_bottom_up = ((flags & 0x20) == 0); /* bit 5 set => top-down */
- interlace_type = flags >> 6; /* bits 6/7 are interlace code */
-
- if (cmaptype > 1 || /* cmaptype must be 0 or 1 */
- source->pixel_size < 1 || source->pixel_size > 4 ||
- (UCH(targaheader[16]) & 7) != 0 || /* bits/pixel must be multiple of 8 */
- interlace_type != 0) /* currently don't allow interlaced image */
- ERREXIT(cinfo, JERR_TGA_BADPARMS);
-
- if (subtype > 8) {
- /* It's an RLE-coded file */
- source->read_pixel = read_rle_pixel;
- source->block_count = source->dup_pixel_count = 0;
- subtype -= 8;
- } else {
- /* Non-RLE file */
- source->read_pixel = read_non_rle_pixel;
- }
-
- /* Now should have subtype 1, 2, or 3 */
- components = 3; /* until proven different */
- cinfo->in_color_space = JCS_RGB;
-
- switch (subtype) {
- case 1: /* Colormapped image */
- if (source->pixel_size == 1 && cmaptype == 1)
- source->get_pixel_rows = get_8bit_row;
- else
- ERREXIT(cinfo, JERR_TGA_BADPARMS);
- TRACEMS2(cinfo, 1, JTRC_TGA_MAPPED, width, height);
- break;
- case 2: /* RGB image */
- switch (source->pixel_size) {
- case 2:
- source->get_pixel_rows = get_16bit_row;
- break;
- case 3:
- source->get_pixel_rows = get_24bit_row;
- break;
- case 4:
- source->get_pixel_rows = get_32bit_row;
- break;
- default:
- ERREXIT(cinfo, JERR_TGA_BADPARMS);
- break;
- }
- TRACEMS2(cinfo, 1, JTRC_TGA, width, height);
- break;
- case 3: /* Grayscale image */
- components = 1;
- cinfo->in_color_space = JCS_GRAYSCALE;
- if (source->pixel_size == 1)
- source->get_pixel_rows = get_8bit_gray_row;
- else
- ERREXIT(cinfo, JERR_TGA_BADPARMS);
- TRACEMS2(cinfo, 1, JTRC_TGA_GRAY, width, height);
- break;
- default:
- ERREXIT(cinfo, JERR_TGA_BADPARMS);
- break;
- }
-
- if (is_bottom_up) {
- /* Create a virtual array to buffer the upside-down image. */
- source->whole_image = (*cinfo->mem->request_virt_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
- (JDIMENSION) width * components, (JDIMENSION) height, (JDIMENSION) 1);
- if (cinfo->progress != NULL) {
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
- progress->total_extra_passes++; /* count file input as separate pass */
- }
- /* source->pub.buffer will point to the virtual array. */
- source->pub.buffer_height = 1; /* in case anyone looks at it */
- source->pub.get_pixel_rows = preload_image;
- } else {
- /* Don't need a virtual array, but do need a one-row input buffer. */
- source->whole_image = NULL;
- source->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (JDIMENSION) width * components, (JDIMENSION) 1);
- source->pub.buffer_height = 1;
- source->pub.get_pixel_rows = source->get_pixel_rows;
- }
-
- while (idlen--) /* Throw away ID field */
- (void) read_byte(source);
-
- if (maplen > 0) {
- if (maplen > 256 || GET_2B(3) != 0)
- ERREXIT(cinfo, JERR_TGA_BADCMAP);
- /* Allocate space to store the colormap */
- source->colormap = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, (JDIMENSION) maplen, (JDIMENSION) 3);
- /* and read it from the file */
- read_colormap(source, (int) maplen, UCH(targaheader[7]));
- } else {
- if (cmaptype) /* but you promised a cmap! */
- ERREXIT(cinfo, JERR_TGA_BADPARMS);
- source->colormap = NULL;
- }
-
- cinfo->input_components = components;
- cinfo->data_precision = 8;
- cinfo->image_width = width;
- cinfo->image_height = height;
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_input_tga (j_compress_ptr cinfo, cjpeg_source_ptr sinfo)
-{
- /* no work */
-}
-
-
-/*
- * The module selection routine for Targa format input.
- */
-
-GLOBAL(cjpeg_source_ptr)
-jinit_read_targa (j_compress_ptr cinfo)
-{
- tga_source_ptr source;
-
- /* Create module interface object */
- source = (tga_source_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(tga_source_struct));
- source->cinfo = cinfo; /* make back link for subroutines */
- /* Fill in method ptrs, except get_pixel_rows which start_input sets */
- source->pub.start_input = start_input_tga;
- source->pub.finish_input = finish_input_tga;
-
- return (cjpeg_source_ptr) source;
-}
-
-#endif /* TARGA_SUPPORTED */
+++ /dev/null
-IJG JPEG LIBRARY: SYSTEM ARCHITECTURE
-
-Copyright (C) 1991-1995, Thomas G. Lane.
-This file is part of the Independent JPEG Group's software.
-For conditions of distribution and use, see the accompanying README file.
-
-
-This file provides an overview of the architecture of the IJG JPEG software;
-that is, the functions of the various modules in the system and the interfaces
-between modules. For more precise details about any data structure or calling
-convention, see the include files and comments in the source code.
-
-We assume that the reader is already somewhat familiar with the JPEG standard.
-The README file includes references for learning about JPEG. The file
-libjpeg.doc describes the library from the viewpoint of an application
-programmer using the library; it's best to read that file before this one.
-Also, the file coderules.doc describes the coding style conventions we use.
-
-In this document, JPEG-specific terminology follows the JPEG standard:
- A "component" means a color channel, e.g., Red or Luminance.
- A "sample" is a single component value (i.e., one number in the image data).
- A "coefficient" is a frequency coefficient (a DCT transform output number).
- A "block" is an 8x8 group of samples or coefficients.
- An "MCU" (minimum coded unit) is an interleaved set of blocks of size
- determined by the sampling factors, or a single block in a
- noninterleaved scan.
-We do not use the terms "pixel" and "sample" interchangeably. When we say
-pixel, we mean an element of the full-size image, while a sample is an element
-of the downsampled image. Thus the number of samples may vary across
-components while the number of pixels does not. (This terminology is not used
-rigorously throughout the code, but it is used in places where confusion would
-otherwise result.)
-
-
-*** System features ***
-
-The IJG distribution contains two parts:
- * A subroutine library for JPEG compression and decompression.
- * cjpeg/djpeg, two sample applications that use the library to transform
- JFIF JPEG files to and from several other image formats.
-cjpeg/djpeg are of no great intellectual complexity: they merely add a simple
-command-line user interface and I/O routines for several uncompressed image
-formats. This document concentrates on the library itself.
-
-We desire the library to be capable of supporting all JPEG baseline, extended
-sequential, and progressive DCT processes. Hierarchical processes are not
-supported.
-
-The library does not support the lossless (spatial) JPEG process. Lossless
-JPEG shares little or no code with lossy JPEG, and would normally be used
-without the extensive pre- and post-processing provided by this library.
-We feel that lossless JPEG is better handled by a separate library.
-
-Within these limits, any set of compression parameters allowed by the JPEG
-spec should be readable for decompression. (We can be more restrictive about
-what formats we can generate.) Although the system design allows for all
-parameter values, some uncommon settings are not yet implemented and may
-never be; nonintegral sampling ratios are the prime example. Furthermore,
-we treat 8-bit vs. 12-bit data precision as a compile-time switch, not a
-run-time option, because most machines can store 8-bit pixels much more
-compactly than 12-bit.
-
-For legal reasons, JPEG arithmetic coding is not currently supported, but
-extending the library to include it would be straightforward.
-
-By itself, the library handles only interchange JPEG datastreams --- in
-particular the widely used JFIF file format. The library can be used by
-surrounding code to process interchange or abbreviated JPEG datastreams that
-are embedded in more complex file formats. (For example, libtiff uses this
-library to implement JPEG compression within the TIFF file format.)
-
-The library includes a substantial amount of code that is not covered by the
-JPEG standard but is necessary for typical applications of JPEG. These
-functions preprocess the image before JPEG compression or postprocess it after
-decompression. They include colorspace conversion, downsampling/upsampling,
-and color quantization. This code can be omitted if not needed.
-
-A wide range of quality vs. speed tradeoffs are possible in JPEG processing,
-and even more so in decompression postprocessing. The decompression library
-provides multiple implementations that cover most of the useful tradeoffs,
-ranging from very-high-quality down to fast-preview operation. On the
-compression side we have generally not provided low-quality choices, since
-compression is normally less time-critical. It should be understood that the
-low-quality modes may not meet the JPEG standard's accuracy requirements;
-nonetheless, they are useful for viewers.
-
-
-*** Portability issues ***
-
-Portability is an essential requirement for the library. The key portability
-issues that show up at the level of system architecture are:
-
-1. Memory usage. We want the code to be able to run on PC-class machines
-with limited memory. Images should therefore be processed sequentially (in
-strips), to avoid holding the whole image in memory at once. Where a
-full-image buffer is necessary, we should be able to use either virtual memory
-or temporary files.
-
-2. Near/far pointer distinction. To run efficiently on 80x86 machines, the
-code should distinguish "small" objects (kept in near data space) from
-"large" ones (kept in far data space). This is an annoying restriction, but
-fortunately it does not impact code quality for less brain-damaged machines,
-and the source code clutter turns out to be minimal with sufficient use of
-pointer typedefs.
-
-3. Data precision. We assume that "char" is at least 8 bits, "short" and
-"int" at least 16, "long" at least 32. The code will work fine with larger
-data sizes, although memory may be used inefficiently in some cases. However,
-the JPEG compressed datastream must ultimately appear on external storage as a
-sequence of 8-bit bytes if it is to conform to the standard. This may pose a
-problem on machines where char is wider than 8 bits. The library represents
-compressed data as an array of values of typedef JOCTET. If no data type
-exactly 8 bits wide is available, custom data source and data destination
-modules must be written to unpack and pack the chosen JOCTET datatype into
-8-bit external representation.
-
-
-*** System overview ***
-
-The compressor and decompressor are each divided into two main sections:
-the JPEG compressor or decompressor proper, and the preprocessing or
-postprocessing functions. The interface between these two sections is the
-image data that the official JPEG spec regards as its input or output: this
-data is in the colorspace to be used for compression, and it is downsampled
-to the sampling factors to be used. The preprocessing and postprocessing
-steps are responsible for converting a normal image representation to or from
-this form. (Those few applications that want to deal with YCbCr downsampled
-data can skip the preprocessing or postprocessing step.)
-
-Looking more closely, the compressor library contains the following main
-elements:
-
- Preprocessing:
- * Color space conversion (e.g., RGB to YCbCr).
- * Edge expansion and downsampling. Optionally, this step can do simple
- smoothing --- this is often helpful for low-quality source data.
- JPEG proper:
- * MCU assembly, DCT, quantization.
- * Entropy coding (sequential or progressive, Huffman or arithmetic).
-
-In addition to these modules we need overall control, marker generation,
-and support code (memory management & error handling). There is also a
-module responsible for physically writing the output data --- typically
-this is just an interface to fwrite(), but some applications may need to
-do something else with the data.
-
-The decompressor library contains the following main elements:
-
- JPEG proper:
- * Entropy decoding (sequential or progressive, Huffman or arithmetic).
- * Dequantization, inverse DCT, MCU disassembly.
- Postprocessing:
- * Upsampling. Optionally, this step may be able to do more general
- rescaling of the image.
- * Color space conversion (e.g., YCbCr to RGB). This step may also
- provide gamma adjustment [ currently it does not ].
- * Optional color quantization (e.g., reduction to 256 colors).
- * Optional color precision reduction (e.g., 24-bit to 15-bit color).
- [This feature is not currently implemented.]
-
-We also need overall control, marker parsing, and a data source module.
-The support code (memory management & error handling) can be shared with
-the compression half of the library.
-
-There may be several implementations of each of these elements, particularly
-in the decompressor, where a wide range of speed/quality tradeoffs is very
-useful. It must be understood that some of the best speedups involve
-merging adjacent steps in the pipeline. For example, upsampling, color space
-conversion, and color quantization might all be done at once when using a
-low-quality ordered-dither technique. The system architecture is designed to
-allow such merging where appropriate.
-
-
-Note: it is convenient to regard edge expansion (padding to block boundaries)
-as a preprocessing/postprocessing function, even though the JPEG spec includes
-it in compression/decompression. We do this because downsampling/upsampling
-can be simplified a little if they work on padded data: it's not necessary to
-have special cases at the right and bottom edges. Therefore the interface
-buffer is always an integral number of blocks wide and high, and we expect
-compression preprocessing to pad the source data properly. Padding will occur
-only to the next block (8-sample) boundary. In an interleaved-scan situation,
-additional dummy blocks may be used to fill out MCUs, but the MCU assembly and
-disassembly logic will create or discard these blocks internally. (This is
-advantageous for speed reasons, since we avoid DCTing the dummy blocks.
-It also permits a small reduction in file size, because the compressor can
-choose dummy block contents so as to minimize their size in compressed form.
-Finally, it makes the interface buffer specification independent of whether
-the file is actually interleaved or not.) Applications that wish to deal
-directly with the downsampled data must provide similar buffering and padding
-for odd-sized images.
-
-
-*** Poor man's object-oriented programming ***
-
-It should be clear by now that we have a lot of quasi-independent processing
-steps, many of which have several possible behaviors. To avoid cluttering the
-code with lots of switch statements, we use a simple form of object-style
-programming to separate out the different possibilities.
-
-For example, two different color quantization algorithms could be implemented
-as two separate modules that present the same external interface; at runtime,
-the calling code will access the proper module indirectly through an "object".
-
-We can get the limited features we need while staying within portable C.
-The basic tool is a function pointer. An "object" is just a struct
-containing one or more function pointer fields, each of which corresponds to
-a method name in real object-oriented languages. During initialization we
-fill in the function pointers with references to whichever module we have
-determined we need to use in this run. Then invocation of the module is done
-by indirecting through a function pointer; on most machines this is no more
-expensive than a switch statement, which would be the only other way of
-making the required run-time choice. The really significant benefit, of
-course, is keeping the source code clean and well structured.
-
-We can also arrange to have private storage that varies between different
-implementations of the same kind of object. We do this by making all the
-module-specific object structs be separately allocated entities, which will
-be accessed via pointers in the master compression or decompression struct.
-The "public" fields or methods for a given kind of object are specified by
-a commonly known struct. But a module's initialization code can allocate
-a larger struct that contains the common struct as its first member, plus
-additional private fields. With appropriate pointer casting, the module's
-internal functions can access these private fields. (For a simple example,
-see jdatadst.c, which implements the external interface specified by struct
-jpeg_destination_mgr, but adds extra fields.)
-
-(Of course this would all be a lot easier if we were using C++, but we are
-not yet prepared to assume that everyone has a C++ compiler.)
-
-An important benefit of this scheme is that it is easy to provide multiple
-versions of any method, each tuned to a particular case. While a lot of
-precalculation might be done to select an optimal implementation of a method,
-the cost per invocation is constant. For example, the upsampling step might
-have a "generic" method, plus one or more "hardwired" methods for the most
-popular sampling factors; the hardwired methods would be faster because they'd
-use straight-line code instead of for-loops. The cost to determine which
-method to use is paid only once, at startup, and the selection criteria are
-hidden from the callers of the method.
-
-This plan differs a little bit from usual object-oriented structures, in that
-only one instance of each object class will exist during execution. The
-reason for having the class structure is that on different runs we may create
-different instances (choose to execute different modules). You can think of
-the term "method" as denoting the common interface presented by a particular
-set of interchangeable functions, and "object" as denoting a group of related
-methods, or the total shared interface behavior of a group of modules.
-
-
-*** Overall control structure ***
-
-We previously mentioned the need for overall control logic in the compression
-and decompression libraries. In IJG implementations prior to v5, overall
-control was mostly provided by "pipeline control" modules, which proved to be
-large, unwieldy, and hard to understand. To improve the situation, the
-control logic has been subdivided into multiple modules. The control modules
-consist of:
-
-1. Master control for module selection and initialization. This has two
-responsibilities:
-
- 1A. Startup initialization at the beginning of image processing.
- The individual processing modules to be used in this run are selected
- and given initialization calls.
-
- 1B. Per-pass control. This determines how many passes will be performed
- and calls each active processing module to configure itself
- appropriately at the beginning of each pass. End-of-pass processing,
- where necessary, is also invoked from the master control module.
-
- Method selection is partially distributed, in that a particular processing
- module may contain several possible implementations of a particular method,
- which it will select among when given its initialization call. The master
- control code need only be concerned with decisions that affect more than
- one module.
-
-2. Data buffering control. A separate control module exists for each
- inter-processing-step data buffer. This module is responsible for
- invoking the processing steps that write or read that data buffer.
-
-Each buffer controller sees the world as follows:
-
-input data => processing step A => buffer => processing step B => output data
- | | |
- ------------------ controller ------------------
-
-The controller knows the dataflow requirements of steps A and B: how much data
-they want to accept in one chunk and how much they output in one chunk. Its
-function is to manage its buffer and call A and B at the proper times.
-
-A data buffer control module may itself be viewed as a processing step by a
-higher-level control module; thus the control modules form a binary tree with
-elementary processing steps at the leaves of the tree.
-
-The control modules are objects. A considerable amount of flexibility can
-be had by replacing implementations of a control module. For example:
-* Merging of adjacent steps in the pipeline is done by replacing a control
- module and its pair of processing-step modules with a single processing-
- step module. (Hence the possible merges are determined by the tree of
- control modules.)
-* In some processing modes, a given interstep buffer need only be a "strip"
- buffer large enough to accommodate the desired data chunk sizes. In other
- modes, a full-image buffer is needed and several passes are required.
- The control module determines which kind of buffer is used and manipulates
- virtual array buffers as needed. One or both processing steps may be
- unaware of the multi-pass behavior.
-
-In theory, we might be able to make all of the data buffer controllers
-interchangeable and provide just one set of implementations for all. In
-practice, each one contains considerable special-case processing for its
-particular job. The buffer controller concept should be regarded as an
-overall system structuring principle, not as a complete description of the
-task performed by any one controller.
-
-
-*** Compression object structure ***
-
-Here is a sketch of the logical structure of the JPEG compression library:
-
- |-- Colorspace conversion
- |-- Preprocessing controller --|
- | |-- Downsampling
-Main controller --|
- | |-- Forward DCT, quantize
- |-- Coefficient controller --|
- |-- Entropy encoding
-
-This sketch also describes the flow of control (subroutine calls) during
-typical image data processing. Each of the components shown in the diagram is
-an "object" which may have several different implementations available. One
-or more source code files contain the actual implementation(s) of each object.
-
-The objects shown above are:
-
-* Main controller: buffer controller for the subsampled-data buffer, which
- holds the preprocessed input data. This controller invokes preprocessing to
- fill the subsampled-data buffer, and JPEG compression to empty it. There is
- usually no need for a full-image buffer here; a strip buffer is adequate.
-
-* Preprocessing controller: buffer controller for the downsampling input data
- buffer, which lies between colorspace conversion and downsampling. Note
- that a unified conversion/downsampling module would probably replace this
- controller entirely.
-
-* Colorspace conversion: converts application image data into the desired
- JPEG color space; also changes the data from pixel-interleaved layout to
- separate component planes. Processes one pixel row at a time.
-
-* Downsampling: performs reduction of chroma components as required.
- Optionally may perform pixel-level smoothing as well. Processes a "row
- group" at a time, where a row group is defined as Vmax pixel rows of each
- component before downsampling, and Vk sample rows afterwards (remember Vk
- differs across components). Some downsampling or smoothing algorithms may
- require context rows above and below the current row group; the
- preprocessing controller is responsible for supplying these rows via proper
- buffering. The downsampler is responsible for edge expansion at the right
- edge (i.e., extending each sample row to a multiple of 8 samples); but the
- preprocessing controller is responsible for vertical edge expansion (i.e.,
- duplicating the bottom sample row as needed to make a multiple of 8 rows).
-
-* Coefficient controller: buffer controller for the DCT-coefficient data.
- This controller handles MCU assembly, including insertion of dummy DCT
- blocks when needed at the right or bottom edge. When performing
- Huffman-code optimization or emitting a multiscan JPEG file, this
- controller is responsible for buffering the full image. The equivalent of
- one fully interleaved MCU row of subsampled data is processed per call,
- even when the JPEG file is noninterleaved.
-
-* Forward DCT and quantization: Perform DCT, quantize, and emit coefficients.
- Works on one or more DCT blocks at a time. (Note: the coefficients are now
- emitted in normal array order, which the entropy encoder is expected to
- convert to zigzag order as necessary. Prior versions of the IJG code did
- the conversion to zigzag order within the quantization step.)
-
-* Entropy encoding: Perform Huffman or arithmetic entropy coding and emit the
- coded data to the data destination module. Works on one MCU per call.
- For progressive JPEG, the same DCT blocks are fed to the entropy coder
- during each pass, and the coder must emit the appropriate subset of
- coefficients.
-
-In addition to the above objects, the compression library includes these
-objects:
-
-* Master control: determines the number of passes required, controls overall
- and per-pass initialization of the other modules.
-
-* Marker writing: generates JPEG markers (except for RSTn, which is emitted
- by the entropy encoder when needed).
-
-* Data destination manager: writes the output JPEG datastream to its final
- destination (e.g., a file). The destination manager supplied with the
- library knows how to write to a stdio stream; for other behaviors, the
- surrounding application may provide its own destination manager.
-
-* Memory manager: allocates and releases memory, controls virtual arrays
- (with backing store management, where required).
-
-* Error handler: performs formatting and output of error and trace messages;
- determines handling of nonfatal errors. The surrounding application may
- override some or all of this object's methods to change error handling.
-
-* Progress monitor: supports output of "percent-done" progress reports.
- This object represents an optional callback to the surrounding application:
- if wanted, it must be supplied by the application.
-
-The error handler, destination manager, and progress monitor objects are
-defined as separate objects in order to simplify application-specific
-customization of the JPEG library. A surrounding application may override
-individual methods or supply its own all-new implementation of one of these
-objects. The object interfaces for these objects are therefore treated as
-part of the application interface of the library, whereas the other objects
-are internal to the library.
-
-The error handler and memory manager are shared by JPEG compression and
-decompression; the progress monitor, if used, may be shared as well.
-
-
-*** Decompression object structure ***
-
-Here is a sketch of the logical structure of the JPEG decompression library:
-
- |-- Entropy decoding
- |-- Coefficient controller --|
- | |-- Dequantize, Inverse DCT
-Main controller --|
- | |-- Upsampling
- |-- Postprocessing controller --| |-- Colorspace conversion
- |-- Color quantization
- |-- Color precision reduction
-
-As before, this diagram also represents typical control flow. The objects
-shown are:
-
-* Main controller: buffer controller for the subsampled-data buffer, which
- holds the output of JPEG decompression proper. This controller's primary
- task is to feed the postprocessing procedure. Some upsampling algorithms
- may require context rows above and below the current row group; when this
- is true, the main controller is responsible for managing its buffer so as
- to make context rows available. In the current design, the main buffer is
- always a strip buffer; a full-image buffer is never required.
-
-* Coefficient controller: buffer controller for the DCT-coefficient data.
- This controller handles MCU disassembly, including deletion of any dummy
- DCT blocks at the right or bottom edge. When reading a multiscan JPEG
- file, this controller is responsible for buffering the full image.
- (Buffering DCT coefficients, rather than samples, is necessary to support
- progressive JPEG.) The equivalent of one fully interleaved MCU row of
- subsampled data is processed per call, even when the source JPEG file is
- noninterleaved.
-
-* Entropy decoding: Read coded data from the data source module and perform
- Huffman or arithmetic entropy decoding. Works on one MCU per call.
- For progressive JPEG decoding, the coefficient controller supplies the prior
- coefficients of each MCU (initially all zeroes), which the entropy decoder
- modifies in each scan.
-
-* Dequantization and inverse DCT: like it says. Note that the coefficients
- buffered by the coefficient controller have NOT been dequantized; we
- merge dequantization and inverse DCT into a single step for speed reasons.
- When scaled-down output is asked for, simplified DCT algorithms may be used
- that emit only 1x1, 2x2, or 4x4 samples per DCT block, not the full 8x8.
- Works on one DCT block at a time.
-
-* Postprocessing controller: buffer controller for the color quantization
- input buffer, when quantization is in use. (Without quantization, this
- controller just calls the upsampler.) For two-pass quantization, this
- controller is responsible for buffering the full-image data.
-
-* Upsampling: restores chroma components to full size. (May support more
- general output rescaling, too. Note that if undersized DCT outputs have
- been emitted by the DCT module, this module must adjust so that properly
- sized outputs are created.) Works on one row group at a time. This module
- also calls the color conversion module, so its top level is effectively a
- buffer controller for the upsampling->color conversion buffer. However, in
- all but the highest-quality operating modes, upsampling and color
- conversion are likely to be merged into a single step.
-
-* Colorspace conversion: convert from JPEG color space to output color space,
- and change data layout from separate component planes to pixel-interleaved.
- Works on one pixel row at a time.
-
-* Color quantization: reduce the data to colormapped form, using either an
- externally specified colormap or an internally generated one. This module
- is not used for full-color output. Works on one pixel row at a time; may
- require two passes to generate a color map. Note that the output will
- always be a single component representing colormap indexes. In the current
- design, the output values are JSAMPLEs, so an 8-bit compilation cannot
- quantize to more than 256 colors. This is unlikely to be a problem in
- practice.
-
-* Color reduction: this module handles color precision reduction, e.g.,
- generating 15-bit color (5 bits/primary) from JPEG's 24-bit output.
- Not quite clear yet how this should be handled... should we merge it with
- colorspace conversion???
-
-Note that some high-speed operating modes might condense the entire
-postprocessing sequence to a single module (upsample, color convert, and
-quantize in one step).
-
-In addition to the above objects, the decompression library includes these
-objects:
-
-* Master control: determines the number of passes required, controls overall
- and per-pass initialization of the other modules. This is subdivided into
- input and output control: jdinput.c controls only input-side processing,
- while jdmaster.c handles overall initialization and output-side control.
-
-* Marker reading: decodes JPEG markers (except for RSTn).
-
-* Data source manager: supplies the input JPEG datastream. The source
- manager supplied with the library knows how to read from a stdio stream;
- for other behaviors, the surrounding application may provide its own source
- manager.
-
-* Memory manager: same as for compression library.
-
-* Error handler: same as for compression library.
-
-* Progress monitor: same as for compression library.
-
-As with compression, the data source manager, error handler, and progress
-monitor are candidates for replacement by a surrounding application.
-
-
-*** Decompression input and output separation ***
-
-To support efficient incremental display of progressive JPEG files, the
-decompressor is divided into two sections that can run independently:
-
-1. Data input includes marker parsing, entropy decoding, and input into the
- coefficient controller's DCT coefficient buffer. Note that this
- processing is relatively cheap and fast.
-
-2. Data output reads from the DCT coefficient buffer and performs the IDCT
- and all postprocessing steps.
-
-For a progressive JPEG file, the data input processing is allowed to get
-arbitrarily far ahead of the data output processing. (This occurs only
-if the application calls jpeg_consume_input(); otherwise input and output
-run in lockstep, since the input section is called only when the output
-section needs more data.) In this way the application can avoid making
-extra display passes when data is arriving faster than the display pass
-can run. Furthermore, it is possible to abort an output pass without
-losing anything, since the coefficient buffer is read-only as far as the
-output section is concerned. See libjpeg.doc for more detail.
-
-A full-image coefficient array is only created if the JPEG file has multiple
-scans (or if the application specifies buffered-image mode anyway). When
-reading a single-scan file, the coefficient controller normally creates only
-a one-MCU buffer, so input and output processing must run in lockstep in this
-case. jpeg_consume_input() is effectively a no-op in this situation.
-
-The main impact of dividing the decompressor in this fashion is that we must
-be very careful with shared variables in the cinfo data structure. Each
-variable that can change during the course of decompression must be
-classified as belonging to data input or data output, and each section must
-look only at its own variables. For example, the data output section may not
-depend on any of the variables that describe the current scan in the JPEG
-file, because these may change as the data input section advances into a new
-scan.
-
-The progress monitor is (somewhat arbitrarily) defined to treat input of the
-file as one pass when buffered-image mode is not used, and to ignore data
-input work completely when buffered-image mode is used. Note that the
-library has no reliable way to predict the number of passes when dealing
-with a progressive JPEG file, nor can it predict the number of output passes
-in buffered-image mode. So the work estimate is inherently bogus anyway.
-
-No comparable division is currently made in the compression library, because
-there isn't any real need for it.
-
-
-*** Data formats ***
-
-Arrays of pixel sample values use the following data structure:
-
- typedef something JSAMPLE; a pixel component value, 0..MAXJSAMPLE
- typedef JSAMPLE *JSAMPROW; ptr to a row of samples
- typedef JSAMPROW *JSAMPARRAY; ptr to a list of rows
- typedef JSAMPARRAY *JSAMPIMAGE; ptr to a list of color-component arrays
-
-The basic element type JSAMPLE will typically be one of unsigned char,
-(signed) char, or short. Short will be used if samples wider than 8 bits are
-to be supported (this is a compile-time option). Otherwise, unsigned char is
-used if possible. If the compiler only supports signed chars, then it is
-necessary to mask off the value when reading. Thus, all reads of JSAMPLE
-values must be coded as "GETJSAMPLE(value)", where the macro will be defined
-as "((value) & 0xFF)" on signed-char machines and "((int) (value))" elsewhere.
-
-With these conventions, JSAMPLE values can be assumed to be >= 0. This helps
-simplify correct rounding during downsampling, etc. The JPEG standard's
-specification that sample values run from -128..127 is accommodated by
-subtracting 128 just as the sample value is copied into the source array for
-the DCT step (this will be an array of signed ints). Similarly, during
-decompression the output of the IDCT step will be immediately shifted back to
-0..255. (NB: different values are required when 12-bit samples are in use.
-The code is written in terms of MAXJSAMPLE and CENTERJSAMPLE, which will be
-defined as 255 and 128 respectively in an 8-bit implementation, and as 4095
-and 2048 in a 12-bit implementation.)
-
-We use a pointer per row, rather than a two-dimensional JSAMPLE array. This
-choice costs only a small amount of memory and has several benefits:
-* Code using the data structure doesn't need to know the allocated width of
- the rows. This simplifies edge expansion/compression, since we can work
- in an array that's wider than the logical picture width.
-* Indexing doesn't require multiplication; this is a performance win on many
- machines.
-* Arrays with more than 64K total elements can be supported even on machines
- where malloc() cannot allocate chunks larger than 64K.
-* The rows forming a component array may be allocated at different times
- without extra copying. This trick allows some speedups in smoothing steps
- that need access to the previous and next rows.
-
-Note that each color component is stored in a separate array; we don't use the
-traditional layout in which the components of a pixel are stored together.
-This simplifies coding of modules that work on each component independently,
-because they don't need to know how many components there are. Furthermore,
-we can read or write each component to a temporary file independently, which
-is helpful when dealing with noninterleaved JPEG files.
-
-In general, a specific sample value is accessed by code such as
- GETJSAMPLE(image[colorcomponent][row][col])
-where col is measured from the image left edge, but row is measured from the
-first sample row currently in memory. Either of the first two indexings can
-be precomputed by copying the relevant pointer.
-
-
-Since most image-processing applications prefer to work on images in which
-the components of a pixel are stored together, the data passed to or from the
-surrounding application uses the traditional convention: a single pixel is
-represented by N consecutive JSAMPLE values, and an image row is an array of
-(# of color components)*(image width) JSAMPLEs. One or more rows of data can
-be represented by a pointer of type JSAMPARRAY in this scheme. This scheme is
-converted to component-wise storage inside the JPEG library. (Applications
-that want to skip JPEG preprocessing or postprocessing will have to contend
-with component-wise storage.)
-
-
-Arrays of DCT-coefficient values use the following data structure:
-
- typedef short JCOEF; a 16-bit signed integer
- typedef JCOEF JBLOCK[DCTSIZE2]; an 8x8 block of coefficients
- typedef JBLOCK *JBLOCKROW; ptr to one horizontal row of 8x8 blocks
- typedef JBLOCKROW *JBLOCKARRAY; ptr to a list of such rows
- typedef JBLOCKARRAY *JBLOCKIMAGE; ptr to a list of color component arrays
-
-The underlying type is at least a 16-bit signed integer; while "short" is big
-enough on all machines of interest, on some machines it is preferable to use
-"int" for speed reasons, despite the storage cost. Coefficients are grouped
-into 8x8 blocks (but we always use #defines DCTSIZE and DCTSIZE2 rather than
-"8" and "64").
-
-The contents of a coefficient block may be in either "natural" or zigzagged
-order, and may be true values or divided by the quantization coefficients,
-depending on where the block is in the processing pipeline. In the current
-library, coefficient blocks are kept in natural order everywhere; the entropy
-codecs zigzag or dezigzag the data as it is written or read. The blocks
-contain quantized coefficients everywhere outside the DCT/IDCT subsystems.
-(This latter decision may need to be revisited to support variable
-quantization a la JPEG Part 3.)
-
-Notice that the allocation unit is now a row of 8x8 blocks, corresponding to
-eight rows of samples. Otherwise the structure is much the same as for
-samples, and for the same reasons.
-
-On machines where malloc() can't handle a request bigger than 64Kb, this data
-structure limits us to rows of less than 512 JBLOCKs, or a picture width of
-4000+ pixels. This seems an acceptable restriction.
-
-
-On 80x86 machines, the bottom-level pointer types (JSAMPROW and JBLOCKROW)
-must be declared as "far" pointers, but the upper levels can be "near"
-(implying that the pointer lists are allocated in the DS segment).
-We use a #define symbol FAR, which expands to the "far" keyword when
-compiling on 80x86 machines and to nothing elsewhere.
-
-
-*** Suspendable processing ***
-
-In some applications it is desirable to use the JPEG library as an
-incremental, memory-to-memory filter. In this situation the data source or
-destination may be a limited-size buffer, and we can't rely on being able to
-empty or refill the buffer at arbitrary times. Instead the application would
-like to have control return from the library at buffer overflow/underrun, and
-then resume compression or decompression at a later time.
-
-This scenario is supported for simple cases. (For anything more complex, we
-recommend that the application "bite the bullet" and develop real multitasking
-capability.) The libjpeg.doc file goes into more detail about the usage and
-limitations of this capability; here we address the implications for library
-structure.
-
-The essence of the problem is that the entropy codec (coder or decoder) must
-be prepared to stop at arbitrary times. In turn, the controllers that call
-the entropy codec must be able to stop before having produced or consumed all
-the data that they normally would handle in one call. That part is reasonably
-straightforward: we make the controller call interfaces include "progress
-counters" which indicate the number of data chunks successfully processed, and
-we require callers to test the counter rather than just assume all of the data
-was processed.
-
-Rather than trying to restart at an arbitrary point, the current Huffman
-codecs are designed to restart at the beginning of the current MCU after a
-suspension due to buffer overflow/underrun. At the start of each call, the
-codec's internal state is loaded from permanent storage (in the JPEG object
-structures) into local variables. On successful completion of the MCU, the
-permanent state is updated. (This copying is not very expensive, and may even
-lead to *improved* performance if the local variables can be registerized.)
-If a suspension occurs, the codec simply returns without updating the state,
-thus effectively reverting to the start of the MCU. Note that this implies
-leaving some data unprocessed in the source/destination buffer (ie, the
-compressed partial MCU). The data source/destination module interfaces are
-specified so as to make this possible. This also implies that the data buffer
-must be large enough to hold a worst-case compressed MCU; a couple thousand
-bytes should be enough.
-
-In a successive-approximation AC refinement scan, the progressive Huffman
-decoder has to be able to undo assignments of newly nonzero coefficients if it
-suspends before the MCU is complete, since decoding requires distinguishing
-previously-zero and previously-nonzero coefficients. This is a bit tedious
-but probably won't have much effect on performance. Other variants of Huffman
-decoding need not worry about this, since they will just store the same values
-again if forced to repeat the MCU.
-
-This approach would probably not work for an arithmetic codec, since its
-modifiable state is quite large and couldn't be copied cheaply. Instead it
-would have to suspend and resume exactly at the point of the buffer end.
-
-The JPEG marker reader is designed to cope with suspension at an arbitrary
-point. It does so by backing up to the start of the marker parameter segment,
-so the data buffer must be big enough to hold the largest marker of interest.
-Again, a couple KB should be adequate. (A special "skip" convention is used
-to bypass COM and APPn markers, so these can be larger than the buffer size
-without causing problems; otherwise a 64K buffer would be needed in the worst
-case.)
-
-The JPEG marker writer currently does *not* cope with suspension. I feel that
-this is not necessary; it is much easier simply to require the application to
-ensure there is enough buffer space before starting. (An empty 2K buffer is
-more than sufficient for the header markers; and ensuring there are a dozen or
-two bytes available before calling jpeg_finish_compress() will suffice for the
-trailer.) This would not work for writing multi-scan JPEG files, but
-we simply do not intend to support that capability with suspension.
-
-
-*** Memory manager services ***
-
-The JPEG library's memory manager controls allocation and deallocation of
-memory, and it manages large "virtual" data arrays on machines where the
-operating system does not provide virtual memory. Note that the same
-memory manager serves both compression and decompression operations.
-
-In all cases, allocated objects are tied to a particular compression or
-decompression master record, and they will be released when that master
-record is destroyed.
-
-The memory manager does not provide explicit deallocation of objects.
-Instead, objects are created in "pools" of free storage, and a whole pool
-can be freed at once. This approach helps prevent storage-leak bugs, and
-it speeds up operations whenever malloc/free are slow (as they often are).
-The pools can be regarded as lifetime identifiers for objects. Two
-pools/lifetimes are defined:
- * JPOOL_PERMANENT lasts until master record is destroyed
- * JPOOL_IMAGE lasts until done with image (JPEG datastream)
-Permanent lifetime is used for parameters and tables that should be carried
-across from one datastream to another; this includes all application-visible
-parameters. Image lifetime is used for everything else. (A third lifetime,
-JPOOL_PASS = one processing pass, was originally planned. However it was
-dropped as not being worthwhile. The actual usage patterns are such that the
-peak memory usage would be about the same anyway; and having per-pass storage
-substantially complicates the virtual memory allocation rules --- see below.)
-
-The memory manager deals with three kinds of object:
-1. "Small" objects. Typically these require no more than 10K-20K total.
-2. "Large" objects. These may require tens to hundreds of K depending on
- image size. Semantically they behave the same as small objects, but we
- distinguish them for two reasons:
- * On MS-DOS machines, large objects are referenced by FAR pointers,
- small objects by NEAR pointers.
- * Pool allocation heuristics may differ for large and small objects.
- Note that individual "large" objects cannot exceed the size allowed by
- type size_t, which may be 64K or less on some machines.
-3. "Virtual" objects. These are large 2-D arrays of JSAMPLEs or JBLOCKs
- (typically large enough for the entire image being processed). The
- memory manager provides stripwise access to these arrays. On machines
- without virtual memory, the rest of the array may be swapped out to a
- temporary file.
-
-(Note: JSAMPARRAY and JBLOCKARRAY data structures are a combination of large
-objects for the data proper and small objects for the row pointers. For
-convenience and speed, the memory manager provides single routines to create
-these structures. Similarly, virtual arrays include a small control block
-and a JSAMPARRAY or JBLOCKARRAY working buffer, all created with one call.)
-
-In the present implementation, virtual arrays are only permitted to have image
-lifespan. (Permanent lifespan would not be reasonable, and pass lifespan is
-not very useful since a virtual array's raison d'etre is to store data for
-multiple passes through the image.) We also expect that only "small" objects
-will be given permanent lifespan, though this restriction is not required by
-the memory manager.
-
-In a non-virtual-memory machine, some performance benefit can be gained by
-making the in-memory buffers for virtual arrays be as large as possible.
-(For small images, the buffers might fit entirely in memory, so blind
-swapping would be very wasteful.) The memory manager will adjust the height
-of the buffers to fit within a prespecified maximum memory usage. In order
-to do this in a reasonably optimal fashion, the manager needs to allocate all
-of the virtual arrays at once. Therefore, there isn't a one-step allocation
-routine for virtual arrays; instead, there is a "request" routine that simply
-allocates the control block, and a "realize" routine (called just once) that
-determines space allocation and creates all of the actual buffers. The
-realize routine must allow for space occupied by non-virtual large objects.
-(We don't bother to factor in the space needed for small objects, on the
-grounds that it isn't worth the trouble.)
-
-To support all this, we establish the following protocol for doing business
-with the memory manager:
- 1. Modules must request virtual arrays (which may have only image lifespan)
- during the initial setup phase, i.e., in their jinit_xxx routines.
- 2. All "large" objects (including JSAMPARRAYs and JBLOCKARRAYs) must also be
- allocated during initial setup.
- 3. realize_virt_arrays will be called at the completion of initial setup.
- The above conventions ensure that sufficient information is available
- for it to choose a good size for virtual array buffers.
-Small objects of any lifespan may be allocated at any time. We expect that
-the total space used for small objects will be small enough to be negligible
-in the realize_virt_arrays computation.
-
-In a virtual-memory machine, we simply pretend that the available space is
-infinite, thus causing realize_virt_arrays to decide that it can allocate all
-the virtual arrays as full-size in-memory buffers. The overhead of the
-virtual-array access protocol is very small when no swapping occurs.
-
-A virtual array can be specified to be "pre-zeroed"; when this flag is set,
-never-yet-written sections of the array are set to zero before being made
-available to the caller. If this flag is not set, never-written sections
-of the array contain garbage. (This feature exists primarily because the
-equivalent logic would otherwise be needed in jdcoefct.c for progressive
-JPEG mode; we may as well make it available for possible other uses.)
-
-The first write pass on a virtual array is required to occur in top-to-bottom
-order; read passes, as well as any write passes after the first one, may
-access the array in any order. This restriction exists partly to simplify
-the virtual array control logic, and partly because some file systems may not
-support seeking beyond the current end-of-file in a temporary file. The main
-implication of this restriction is that rearrangement of rows (such as
-converting top-to-bottom data order to bottom-to-top) must be handled while
-reading data out of the virtual array, not while putting it in.
-
-
-*** Memory manager internal structure ***
-
-To isolate system dependencies as much as possible, we have broken the
-memory manager into two parts. There is a reasonably system-independent
-"front end" (jmemmgr.c) and a "back end" that contains only the code
-likely to change across systems. All of the memory management methods
-outlined above are implemented by the front end. The back end provides
-the following routines for use by the front end (none of these routines
-are known to the rest of the JPEG code):
-
-jpeg_mem_init, jpeg_mem_term system-dependent initialization/shutdown
-
-jpeg_get_small, jpeg_free_small interface to malloc and free library routines
- (or their equivalents)
-
-jpeg_get_large, jpeg_free_large interface to FAR malloc/free in MSDOS machines;
- else usually the same as
- jpeg_get_small/jpeg_free_small
-
-jpeg_mem_available estimate available memory
-
-jpeg_open_backing_store create a backing-store object
-
-read_backing_store, manipulate a backing-store object
-write_backing_store,
-close_backing_store
-
-On some systems there will be more than one type of backing-store object
-(specifically, in MS-DOS a backing store file might be an area of extended
-memory as well as a disk file). jpeg_open_backing_store is responsible for
-choosing how to implement a given object. The read/write/close routines
-are method pointers in the structure that describes a given object; this
-lets them be different for different object types.
-
-It may be necessary to ensure that backing store objects are explicitly
-released upon abnormal program termination. For example, MS-DOS won't free
-extended memory by itself. To support this, we will expect the main program
-or surrounding application to arrange to call self_destruct (typically via
-jpeg_destroy) upon abnormal termination. This may require a SIGINT signal
-handler or equivalent. We don't want to have the back end module install its
-own signal handler, because that would pre-empt the surrounding application's
-ability to control signal handling.
-
-The IJG distribution includes several memory manager back end implementations.
-Usually the same back end should be suitable for all applications on a given
-system, but it is possible for an application to supply its own back end at
-need.
-
-
-*** Implications of DNL marker ***
-
-Some JPEG files may use a DNL marker to postpone definition of the image
-height (this would be useful for a fax-like scanner's output, for instance).
-In these files the SOF marker claims the image height is 0, and you only
-find out the true image height at the end of the first scan.
-
-We could read these files as follows:
-1. Upon seeing zero image height, replace it by 65535 (the maximum allowed).
-2. When the DNL is found, update the image height in the global image
- descriptor.
-This implies that control modules must avoid making copies of the image
-height, and must re-test for termination after each MCU row. This would
-be easy enough to do.
-
-In cases where image-size data structures are allocated, this approach will
-result in very inefficient use of virtual memory or much-larger-than-necessary
-temporary files. This seems acceptable for something that probably won't be a
-mainstream usage. People might have to forgo use of memory-hogging options
-(such as two-pass color quantization or noninterleaved JPEG files) if they
-want efficient conversion of such files. (One could improve efficiency by
-demanding a user-supplied upper bound for the height, less than 65536; in most
-cases it could be much less.)
-
-The standard also permits the SOF marker to overestimate the image height,
-with a DNL to give the true, smaller height at the end of the first scan.
-This would solve the space problems if the overestimate wasn't too great.
-However, it implies that you don't even know whether DNL will be used.
-
-This leads to a couple of very serious objections:
-1. Testing for a DNL marker must occur in the inner loop of the decompressor's
- Huffman decoder; this implies a speed penalty whether the feature is used
- or not.
-2. There is no way to hide the last-minute change in image height from an
- application using the decoder. Thus *every* application using the IJG
- library would suffer a complexity penalty whether it cared about DNL or
- not.
-We currently do not support DNL because of these problems.
-
-A different approach is to insist that DNL-using files be preprocessed by a
-separate program that reads ahead to the DNL, then goes back and fixes the SOF
-marker. This is a much simpler solution and is probably far more efficient.
-Even if one wants piped input, buffering the first scan of the JPEG file needs
-a lot smaller temp file than is implied by the maximum-height method. For
-this approach we'd simply treat DNL as a no-op in the decompressor (at most,
-check that it matches the SOF image height).
-
-We will not worry about making the compressor capable of outputting DNL.
-Something similar to the first scheme above could be applied if anyone ever
-wants to make that work.
+++ /dev/null
-P6
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\ No newline at end of file
+++ /dev/null
-/*
- * transupp.c
- *
- * Copyright (C) 1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains image transformation routines and other utility code
- * used by the jpegtran sample application. These are NOT part of the core
- * JPEG library. But we keep these routines separate from jpegtran.c to
- * ease the task of maintaining jpegtran-like programs that have other user
- * interfaces.
- */
-
-/* Although this file really shouldn't have access to the library internals,
- * it's helpful to let it call jround_up() and jcopy_block_row().
- */
-#define JPEG_INTERNALS
-
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "transupp.h" /* My own external interface */
-
-
-#if TRANSFORMS_SUPPORTED
-
-/*
- * Lossless image transformation routines. These routines work on DCT
- * coefficient arrays and thus do not require any lossy decompression
- * or recompression of the image.
- * Thanks to Guido Vollbeding for the initial design and code of this feature.
- *
- * Horizontal flipping is done in-place, using a single top-to-bottom
- * pass through the virtual source array. It will thus be much the
- * fastest option for images larger than main memory.
- *
- * The other routines require a set of destination virtual arrays, so they
- * need twice as much memory as jpegtran normally does. The destination
- * arrays are always written in normal scan order (top to bottom) because
- * the virtual array manager expects this. The source arrays will be scanned
- * in the corresponding order, which means multiple passes through the source
- * arrays for most of the transforms. That could result in much thrashing
- * if the image is larger than main memory.
- *
- * Some notes about the operating environment of the individual transform
- * routines:
- * 1. Both the source and destination virtual arrays are allocated from the
- * source JPEG object, and therefore should be manipulated by calling the
- * source's memory manager.
- * 2. The destination's component count should be used. It may be smaller
- * than the source's when forcing to grayscale.
- * 3. Likewise the destination's sampling factors should be used. When
- * forcing to grayscale the destination's sampling factors will be all 1,
- * and we may as well take that as the effective iMCU size.
- * 4. When "trim" is in effect, the destination's dimensions will be the
- * trimmed values but the source's will be untrimmed.
- * 5. All the routines assume that the source and destination buffers are
- * padded out to a full iMCU boundary. This is true, although for the
- * source buffer it is an undocumented property of jdcoefct.c.
- * Notes 2,3,4 boil down to this: generally we should use the destination's
- * dimensions and ignore the source's.
- */
-
-
-LOCAL(void)
-do_flip_h (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays)
-/* Horizontal flip; done in-place, so no separate dest array is required */
-{
- JDIMENSION MCU_cols, comp_width, blk_x, blk_y;
- int ci, k, offset_y;
- JBLOCKARRAY buffer;
- JCOEFPTR ptr1, ptr2;
- JCOEF temp1, temp2;
- jpeg_component_info *compptr;
-
- /* Horizontal mirroring of DCT blocks is accomplished by swapping
- * pairs of blocks in-place. Within a DCT block, we perform horizontal
- * mirroring by changing the signs of odd-numbered columns.
- * Partial iMCUs at the right edge are left untouched.
- */
- MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_width = MCU_cols * compptr->h_samp_factor;
- for (blk_y = 0; blk_y < compptr->height_in_blocks;
- blk_y += compptr->v_samp_factor) {
- buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- for (blk_x = 0; blk_x * 2 < comp_width; blk_x++) {
- ptr1 = buffer[offset_y][blk_x];
- ptr2 = buffer[offset_y][comp_width - blk_x - 1];
- /* this unrolled loop doesn't need to know which row it's on... */
- for (k = 0; k < DCTSIZE2; k += 2) {
- temp1 = *ptr1; /* swap even column */
- temp2 = *ptr2;
- *ptr1++ = temp2;
- *ptr2++ = temp1;
- temp1 = *ptr1; /* swap odd column with sign change */
- temp2 = *ptr2;
- *ptr1++ = -temp2;
- *ptr2++ = -temp1;
- }
- }
- }
- }
- }
-}
-
-
-LOCAL(void)
-do_flip_v (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jvirt_barray_ptr *dst_coef_arrays)
-/* Vertical flip */
-{
- JDIMENSION MCU_rows, comp_height, dst_blk_x, dst_blk_y;
- int ci, i, j, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JBLOCKROW src_row_ptr, dst_row_ptr;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
- /* We output into a separate array because we can't touch different
- * rows of the source virtual array simultaneously. Otherwise, this
- * is a pretty straightforward analog of horizontal flip.
- * Within a DCT block, vertical mirroring is done by changing the signs
- * of odd-numbered rows.
- * Partial iMCUs at the bottom edge are copied verbatim.
- */
- MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_height = MCU_rows * compptr->v_samp_factor;
- for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
- dst_blk_y += compptr->v_samp_factor) {
- dst_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- if (dst_blk_y < comp_height) {
- /* Row is within the mirrorable area. */
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci],
- comp_height - dst_blk_y - (JDIMENSION) compptr->v_samp_factor,
- (JDIMENSION) compptr->v_samp_factor, FALSE);
- } else {
- /* Bottom-edge blocks will be copied verbatim. */
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, FALSE);
- }
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- if (dst_blk_y < comp_height) {
- /* Row is within the mirrorable area. */
- dst_row_ptr = dst_buffer[offset_y];
- src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1];
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x++) {
- dst_ptr = dst_row_ptr[dst_blk_x];
- src_ptr = src_row_ptr[dst_blk_x];
- for (i = 0; i < DCTSIZE; i += 2) {
- /* copy even row */
- for (j = 0; j < DCTSIZE; j++)
- *dst_ptr++ = *src_ptr++;
- /* copy odd row with sign change */
- for (j = 0; j < DCTSIZE; j++)
- *dst_ptr++ = - *src_ptr++;
- }
- }
- } else {
- /* Just copy row verbatim. */
- jcopy_block_row(src_buffer[offset_y], dst_buffer[offset_y],
- compptr->width_in_blocks);
- }
- }
- }
- }
-}
-
-
-LOCAL(void)
-do_transpose (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jvirt_barray_ptr *dst_coef_arrays)
-/* Transpose source into destination */
-{
- JDIMENSION dst_blk_x, dst_blk_y;
- int ci, i, j, offset_x, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
- /* Transposing pixels within a block just requires transposing the
- * DCT coefficients.
- * Partial iMCUs at the edges require no special treatment; we simply
- * process all the available DCT blocks for every component.
- */
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
- dst_blk_y += compptr->v_samp_factor) {
- dst_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x += compptr->h_samp_factor) {
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x,
- (JDIMENSION) compptr->h_samp_factor, FALSE);
- for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) {
- src_ptr = src_buffer[offset_x][dst_blk_y + offset_y];
- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
- for (i = 0; i < DCTSIZE; i++)
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- }
- }
- }
- }
- }
-}
-
-
-LOCAL(void)
-do_rot_90 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jvirt_barray_ptr *dst_coef_arrays)
-/* 90 degree rotation is equivalent to
- * 1. Transposing the image;
- * 2. Horizontal mirroring.
- * These two steps are merged into a single processing routine.
- */
-{
- JDIMENSION MCU_cols, comp_width, dst_blk_x, dst_blk_y;
- int ci, i, j, offset_x, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
- /* Because of the horizontal mirror step, we can't process partial iMCUs
- * at the (output) right edge properly. They just get transposed and
- * not mirrored.
- */
- MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_width = MCU_cols * compptr->h_samp_factor;
- for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
- dst_blk_y += compptr->v_samp_factor) {
- dst_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x += compptr->h_samp_factor) {
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x,
- (JDIMENSION) compptr->h_samp_factor, FALSE);
- for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) {
- src_ptr = src_buffer[offset_x][dst_blk_y + offset_y];
- if (dst_blk_x < comp_width) {
- /* Block is within the mirrorable area. */
- dst_ptr = dst_buffer[offset_y]
- [comp_width - dst_blk_x - offset_x - 1];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- i++;
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j];
- }
- } else {
- /* Edge blocks are transposed but not mirrored. */
- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
- for (i = 0; i < DCTSIZE; i++)
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- }
- }
- }
- }
- }
- }
-}
-
-
-LOCAL(void)
-do_rot_270 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jvirt_barray_ptr *dst_coef_arrays)
-/* 270 degree rotation is equivalent to
- * 1. Horizontal mirroring;
- * 2. Transposing the image.
- * These two steps are merged into a single processing routine.
- */
-{
- JDIMENSION MCU_rows, comp_height, dst_blk_x, dst_blk_y;
- int ci, i, j, offset_x, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
- /* Because of the horizontal mirror step, we can't process partial iMCUs
- * at the (output) bottom edge properly. They just get transposed and
- * not mirrored.
- */
- MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_height = MCU_rows * compptr->v_samp_factor;
- for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
- dst_blk_y += compptr->v_samp_factor) {
- dst_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x += compptr->h_samp_factor) {
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x,
- (JDIMENSION) compptr->h_samp_factor, FALSE);
- for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) {
- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
- if (dst_blk_y < comp_height) {
- /* Block is within the mirrorable area. */
- src_ptr = src_buffer[offset_x]
- [comp_height - dst_blk_y - offset_y - 1];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++) {
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- j++;
- dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j];
- }
- }
- } else {
- /* Edge blocks are transposed but not mirrored. */
- src_ptr = src_buffer[offset_x][dst_blk_y + offset_y];
- for (i = 0; i < DCTSIZE; i++)
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- }
- }
- }
- }
- }
- }
-}
-
-
-LOCAL(void)
-do_rot_180 (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jvirt_barray_ptr *dst_coef_arrays)
-/* 180 degree rotation is equivalent to
- * 1. Vertical mirroring;
- * 2. Horizontal mirroring.
- * These two steps are merged into a single processing routine.
- */
-{
- JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y;
- int ci, i, j, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JBLOCKROW src_row_ptr, dst_row_ptr;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
- MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
- MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_width = MCU_cols * compptr->h_samp_factor;
- comp_height = MCU_rows * compptr->v_samp_factor;
- for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
- dst_blk_y += compptr->v_samp_factor) {
- dst_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- if (dst_blk_y < comp_height) {
- /* Row is within the vertically mirrorable area. */
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci],
- comp_height - dst_blk_y - (JDIMENSION) compptr->v_samp_factor,
- (JDIMENSION) compptr->v_samp_factor, FALSE);
- } else {
- /* Bottom-edge rows are only mirrored horizontally. */
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, FALSE);
- }
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- if (dst_blk_y < comp_height) {
- /* Row is within the mirrorable area. */
- dst_row_ptr = dst_buffer[offset_y];
- src_row_ptr = src_buffer[compptr->v_samp_factor - offset_y - 1];
- /* Process the blocks that can be mirrored both ways. */
- for (dst_blk_x = 0; dst_blk_x < comp_width; dst_blk_x++) {
- dst_ptr = dst_row_ptr[dst_blk_x];
- src_ptr = src_row_ptr[comp_width - dst_blk_x - 1];
- for (i = 0; i < DCTSIZE; i += 2) {
- /* For even row, negate every odd column. */
- for (j = 0; j < DCTSIZE; j += 2) {
- *dst_ptr++ = *src_ptr++;
- *dst_ptr++ = - *src_ptr++;
- }
- /* For odd row, negate every even column. */
- for (j = 0; j < DCTSIZE; j += 2) {
- *dst_ptr++ = - *src_ptr++;
- *dst_ptr++ = *src_ptr++;
- }
- }
- }
- /* Any remaining right-edge blocks are only mirrored vertically. */
- for (; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) {
- dst_ptr = dst_row_ptr[dst_blk_x];
- src_ptr = src_row_ptr[dst_blk_x];
- for (i = 0; i < DCTSIZE; i += 2) {
- for (j = 0; j < DCTSIZE; j++)
- *dst_ptr++ = *src_ptr++;
- for (j = 0; j < DCTSIZE; j++)
- *dst_ptr++ = - *src_ptr++;
- }
- }
- } else {
- /* Remaining rows are just mirrored horizontally. */
- dst_row_ptr = dst_buffer[offset_y];
- src_row_ptr = src_buffer[offset_y];
- /* Process the blocks that can be mirrored. */
- for (dst_blk_x = 0; dst_blk_x < comp_width; dst_blk_x++) {
- dst_ptr = dst_row_ptr[dst_blk_x];
- src_ptr = src_row_ptr[comp_width - dst_blk_x - 1];
- for (i = 0; i < DCTSIZE2; i += 2) {
- *dst_ptr++ = *src_ptr++;
- *dst_ptr++ = - *src_ptr++;
- }
- }
- /* Any remaining right-edge blocks are only copied. */
- for (; dst_blk_x < compptr->width_in_blocks; dst_blk_x++) {
- dst_ptr = dst_row_ptr[dst_blk_x];
- src_ptr = src_row_ptr[dst_blk_x];
- for (i = 0; i < DCTSIZE2; i++)
- *dst_ptr++ = *src_ptr++;
- }
- }
- }
- }
- }
-}
-
-
-LOCAL(void)
-do_transverse (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jvirt_barray_ptr *dst_coef_arrays)
-/* Transverse transpose is equivalent to
- * 1. 180 degree rotation;
- * 2. Transposition;
- * or
- * 1. Horizontal mirroring;
- * 2. Transposition;
- * 3. Horizontal mirroring.
- * These steps are merged into a single processing routine.
- */
-{
- JDIMENSION MCU_cols, MCU_rows, comp_width, comp_height, dst_blk_x, dst_blk_y;
- int ci, i, j, offset_x, offset_y;
- JBLOCKARRAY src_buffer, dst_buffer;
- JCOEFPTR src_ptr, dst_ptr;
- jpeg_component_info *compptr;
-
- MCU_cols = dstinfo->image_width / (dstinfo->max_h_samp_factor * DCTSIZE);
- MCU_rows = dstinfo->image_height / (dstinfo->max_v_samp_factor * DCTSIZE);
-
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- comp_width = MCU_cols * compptr->h_samp_factor;
- comp_height = MCU_rows * compptr->v_samp_factor;
- for (dst_blk_y = 0; dst_blk_y < compptr->height_in_blocks;
- dst_blk_y += compptr->v_samp_factor) {
- dst_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, dst_coef_arrays[ci], dst_blk_y,
- (JDIMENSION) compptr->v_samp_factor, TRUE);
- for (offset_y = 0; offset_y < compptr->v_samp_factor; offset_y++) {
- for (dst_blk_x = 0; dst_blk_x < compptr->width_in_blocks;
- dst_blk_x += compptr->h_samp_factor) {
- src_buffer = (*srcinfo->mem->access_virt_barray)
- ((j_common_ptr) srcinfo, src_coef_arrays[ci], dst_blk_x,
- (JDIMENSION) compptr->h_samp_factor, FALSE);
- for (offset_x = 0; offset_x < compptr->h_samp_factor; offset_x++) {
- if (dst_blk_y < comp_height) {
- src_ptr = src_buffer[offset_x]
- [comp_height - dst_blk_y - offset_y - 1];
- if (dst_blk_x < comp_width) {
- /* Block is within the mirrorable area. */
- dst_ptr = dst_buffer[offset_y]
- [comp_width - dst_blk_x - offset_x - 1];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++) {
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- j++;
- dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j];
- }
- i++;
- for (j = 0; j < DCTSIZE; j++) {
- dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j];
- j++;
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- }
- }
- } else {
- /* Right-edge blocks are mirrored in y only */
- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++) {
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- j++;
- dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j];
- }
- }
- }
- } else {
- src_ptr = src_buffer[offset_x][dst_blk_y + offset_y];
- if (dst_blk_x < comp_width) {
- /* Bottom-edge blocks are mirrored in x only */
- dst_ptr = dst_buffer[offset_y]
- [comp_width - dst_blk_x - offset_x - 1];
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- i++;
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = -src_ptr[i*DCTSIZE+j];
- }
- } else {
- /* At lower right corner, just transpose, no mirroring */
- dst_ptr = dst_buffer[offset_y][dst_blk_x + offset_x];
- for (i = 0; i < DCTSIZE; i++)
- for (j = 0; j < DCTSIZE; j++)
- dst_ptr[j*DCTSIZE+i] = src_ptr[i*DCTSIZE+j];
- }
- }
- }
- }
- }
- }
- }
-}
-
-
-/* Request any required workspace.
- *
- * We allocate the workspace virtual arrays from the source decompression
- * object, so that all the arrays (both the original data and the workspace)
- * will be taken into account while making memory management decisions.
- * Hence, this routine must be called after jpeg_read_header (which reads
- * the image dimensions) and before jpeg_read_coefficients (which realizes
- * the source's virtual arrays).
- */
-
-GLOBAL(void)
-jtransform_request_workspace (j_decompress_ptr srcinfo,
- jpeg_transform_info *info)
-{
- jvirt_barray_ptr *coef_arrays = NULL;
- jpeg_component_info *compptr;
- int ci;
-
- if (info->force_grayscale &&
- srcinfo->jpeg_color_space == JCS_YCbCr &&
- srcinfo->num_components == 3) {
- /* We'll only process the first component */
- info->num_components = 1;
- } else {
- /* Process all the components */
- info->num_components = srcinfo->num_components;
- }
-
- switch (info->transform) {
- case JXFORM_NONE:
- case JXFORM_FLIP_H:
- /* Don't need a workspace array */
- break;
- case JXFORM_FLIP_V:
- case JXFORM_ROT_180:
- /* Need workspace arrays having same dimensions as source image.
- * Note that we allocate arrays padded out to the next iMCU boundary,
- * so that transform routines need not worry about missing edge blocks.
- */
- coef_arrays = (jvirt_barray_ptr *)
- (*srcinfo->mem->alloc_small) ((j_common_ptr) srcinfo, JPOOL_IMAGE,
- SIZEOF(jvirt_barray_ptr) * info->num_components);
- for (ci = 0; ci < info->num_components; ci++) {
- compptr = srcinfo->comp_info + ci;
- coef_arrays[ci] = (*srcinfo->mem->request_virt_barray)
- ((j_common_ptr) srcinfo, JPOOL_IMAGE, FALSE,
- (JDIMENSION) jround_up((long) compptr->width_in_blocks,
- (long) compptr->h_samp_factor),
- (JDIMENSION) jround_up((long) compptr->height_in_blocks,
- (long) compptr->v_samp_factor),
- (JDIMENSION) compptr->v_samp_factor);
- }
- break;
- case JXFORM_TRANSPOSE:
- case JXFORM_TRANSVERSE:
- case JXFORM_ROT_90:
- case JXFORM_ROT_270:
- /* Need workspace arrays having transposed dimensions.
- * Note that we allocate arrays padded out to the next iMCU boundary,
- * so that transform routines need not worry about missing edge blocks.
- */
- coef_arrays = (jvirt_barray_ptr *)
- (*srcinfo->mem->alloc_small) ((j_common_ptr) srcinfo, JPOOL_IMAGE,
- SIZEOF(jvirt_barray_ptr) * info->num_components);
- for (ci = 0; ci < info->num_components; ci++) {
- compptr = srcinfo->comp_info + ci;
- coef_arrays[ci] = (*srcinfo->mem->request_virt_barray)
- ((j_common_ptr) srcinfo, JPOOL_IMAGE, FALSE,
- (JDIMENSION) jround_up((long) compptr->height_in_blocks,
- (long) compptr->v_samp_factor),
- (JDIMENSION) jround_up((long) compptr->width_in_blocks,
- (long) compptr->h_samp_factor),
- (JDIMENSION) compptr->h_samp_factor);
- }
- break;
- }
- info->workspace_coef_arrays = coef_arrays;
-}
-
-
-/* Transpose destination image parameters */
-
-LOCAL(void)
-transpose_critical_parameters (j_compress_ptr dstinfo)
-{
- int tblno, i, j, ci, itemp;
- jpeg_component_info *compptr;
- JQUANT_TBL *qtblptr;
- JDIMENSION dtemp;
- UINT16 qtemp;
-
- /* Transpose basic image dimensions */
- dtemp = dstinfo->image_width;
- dstinfo->image_width = dstinfo->image_height;
- dstinfo->image_height = dtemp;
-
- /* Transpose sampling factors */
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- compptr = dstinfo->comp_info + ci;
- itemp = compptr->h_samp_factor;
- compptr->h_samp_factor = compptr->v_samp_factor;
- compptr->v_samp_factor = itemp;
- }
-
- /* Transpose quantization tables */
- for (tblno = 0; tblno < NUM_QUANT_TBLS; tblno++) {
- qtblptr = dstinfo->quant_tbl_ptrs[tblno];
- if (qtblptr != NULL) {
- for (i = 0; i < DCTSIZE; i++) {
- for (j = 0; j < i; j++) {
- qtemp = qtblptr->quantval[i*DCTSIZE+j];
- qtblptr->quantval[i*DCTSIZE+j] = qtblptr->quantval[j*DCTSIZE+i];
- qtblptr->quantval[j*DCTSIZE+i] = qtemp;
- }
- }
- }
- }
-}
-
-
-/* Trim off any partial iMCUs on the indicated destination edge */
-
-LOCAL(void)
-trim_right_edge (j_compress_ptr dstinfo)
-{
- int ci, max_h_samp_factor;
- JDIMENSION MCU_cols;
-
- /* We have to compute max_h_samp_factor ourselves,
- * because it hasn't been set yet in the destination
- * (and we don't want to use the source's value).
- */
- max_h_samp_factor = 1;
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- int h_samp_factor = dstinfo->comp_info[ci].h_samp_factor;
- max_h_samp_factor = MAX(max_h_samp_factor, h_samp_factor);
- }
- MCU_cols = dstinfo->image_width / (max_h_samp_factor * DCTSIZE);
- if (MCU_cols > 0) /* can't trim to 0 pixels */
- dstinfo->image_width = MCU_cols * (max_h_samp_factor * DCTSIZE);
-}
-
-LOCAL(void)
-trim_bottom_edge (j_compress_ptr dstinfo)
-{
- int ci, max_v_samp_factor;
- JDIMENSION MCU_rows;
-
- /* We have to compute max_v_samp_factor ourselves,
- * because it hasn't been set yet in the destination
- * (and we don't want to use the source's value).
- */
- max_v_samp_factor = 1;
- for (ci = 0; ci < dstinfo->num_components; ci++) {
- int v_samp_factor = dstinfo->comp_info[ci].v_samp_factor;
- max_v_samp_factor = MAX(max_v_samp_factor, v_samp_factor);
- }
- MCU_rows = dstinfo->image_height / (max_v_samp_factor * DCTSIZE);
- if (MCU_rows > 0) /* can't trim to 0 pixels */
- dstinfo->image_height = MCU_rows * (max_v_samp_factor * DCTSIZE);
-}
-
-
-/* Adjust output image parameters as needed.
- *
- * This must be called after jpeg_copy_critical_parameters()
- * and before jpeg_write_coefficients().
- *
- * The return value is the set of virtual coefficient arrays to be written
- * (either the ones allocated by jtransform_request_workspace, or the
- * original source data arrays). The caller will need to pass this value
- * to jpeg_write_coefficients().
- */
-
-GLOBAL(jvirt_barray_ptr *)
-jtransform_adjust_parameters (j_decompress_ptr srcinfo,
- j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jpeg_transform_info *info)
-{
- /* If force-to-grayscale is requested, adjust destination parameters */
- if (info->force_grayscale) {
- /* We use jpeg_set_colorspace to make sure subsidiary settings get fixed
- * properly. Among other things, the target h_samp_factor & v_samp_factor
- * will get set to 1, which typically won't match the source.
- * In fact we do this even if the source is already grayscale; that
- * provides an easy way of coercing a grayscale JPEG with funny sampling
- * factors to the customary 1,1. (Some decoders fail on other factors.)
- */
- if ((dstinfo->jpeg_color_space == JCS_YCbCr &&
- dstinfo->num_components == 3) ||
- (dstinfo->jpeg_color_space == JCS_GRAYSCALE &&
- dstinfo->num_components == 1)) {
- /* We have to preserve the source's quantization table number. */
- int sv_quant_tbl_no = dstinfo->comp_info[0].quant_tbl_no;
- jpeg_set_colorspace(dstinfo, JCS_GRAYSCALE);
- dstinfo->comp_info[0].quant_tbl_no = sv_quant_tbl_no;
- } else {
- /* Sorry, can't do it */
- ERREXIT(dstinfo, JERR_CONVERSION_NOTIMPL);
- }
- }
-
- /* Correct the destination's image dimensions etc if necessary */
- switch (info->transform) {
- case JXFORM_NONE:
- /* Nothing to do */
- break;
- case JXFORM_FLIP_H:
- if (info->trim)
- trim_right_edge(dstinfo);
- break;
- case JXFORM_FLIP_V:
- if (info->trim)
- trim_bottom_edge(dstinfo);
- break;
- case JXFORM_TRANSPOSE:
- transpose_critical_parameters(dstinfo);
- /* transpose does NOT have to trim anything */
- break;
- case JXFORM_TRANSVERSE:
- transpose_critical_parameters(dstinfo);
- if (info->trim) {
- trim_right_edge(dstinfo);
- trim_bottom_edge(dstinfo);
- }
- break;
- case JXFORM_ROT_90:
- transpose_critical_parameters(dstinfo);
- if (info->trim)
- trim_right_edge(dstinfo);
- break;
- case JXFORM_ROT_180:
- if (info->trim) {
- trim_right_edge(dstinfo);
- trim_bottom_edge(dstinfo);
- }
- break;
- case JXFORM_ROT_270:
- transpose_critical_parameters(dstinfo);
- if (info->trim)
- trim_bottom_edge(dstinfo);
- break;
- }
-
- /* Return the appropriate output data set */
- if (info->workspace_coef_arrays != NULL)
- return info->workspace_coef_arrays;
- return src_coef_arrays;
-}
-
-
-/* Execute the actual transformation, if any.
- *
- * This must be called *after* jpeg_write_coefficients, because it depends
- * on jpeg_write_coefficients to have computed subsidiary values such as
- * the per-component width and height fields in the destination object.
- *
- * Note that some transformations will modify the source data arrays!
- */
-
-GLOBAL(void)
-jtransform_execute_transformation (j_decompress_ptr srcinfo,
- j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jpeg_transform_info *info)
-{
- jvirt_barray_ptr *dst_coef_arrays = info->workspace_coef_arrays;
-
- switch (info->transform) {
- case JXFORM_NONE:
- break;
- case JXFORM_FLIP_H:
- do_flip_h(srcinfo, dstinfo, src_coef_arrays);
- break;
- case JXFORM_FLIP_V:
- do_flip_v(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_TRANSPOSE:
- do_transpose(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_TRANSVERSE:
- do_transverse(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_ROT_90:
- do_rot_90(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_ROT_180:
- do_rot_180(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
- break;
- case JXFORM_ROT_270:
- do_rot_270(srcinfo, dstinfo, src_coef_arrays, dst_coef_arrays);
- break;
- }
-}
-
-#endif /* TRANSFORMS_SUPPORTED */
-
-
-/* Setup decompression object to save desired markers in memory.
- * This must be called before jpeg_read_header() to have the desired effect.
- */
-
-GLOBAL(void)
-jcopy_markers_setup (j_decompress_ptr srcinfo, JCOPY_OPTION option)
-{
-#ifdef SAVE_MARKERS_SUPPORTED
- int m;
-
- /* Save comments except under NONE option */
- if (option != JCOPYOPT_NONE) {
- jpeg_save_markers(srcinfo, JPEG_COM, 0xFFFF);
- }
- /* Save all types of APPn markers iff ALL option */
- if (option == JCOPYOPT_ALL) {
- for (m = 0; m < 16; m++)
- jpeg_save_markers(srcinfo, JPEG_APP0 + m, 0xFFFF);
- }
-#endif /* SAVE_MARKERS_SUPPORTED */
-}
-
-/* Copy markers saved in the given source object to the destination object.
- * This should be called just after jpeg_start_compress() or
- * jpeg_write_coefficients().
- * Note that those routines will have written the SOI, and also the
- * JFIF APP0 or Adobe APP14 markers if selected.
- */
-
-GLOBAL(void)
-jcopy_markers_execute (j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- JCOPY_OPTION option)
-{
- jpeg_saved_marker_ptr marker;
-
- /* In the current implementation, we don't actually need to examine the
- * option flag here; we just copy everything that got saved.
- * But to avoid confusion, we do not output JFIF and Adobe APP14 markers
- * if the encoder library already wrote one.
- */
- for (marker = srcinfo->marker_list; marker != NULL; marker = marker->next) {
- if (dstinfo->write_JFIF_header &&
- marker->marker == JPEG_APP0 &&
- marker->data_length >= 5 &&
- GETJOCTET(marker->data[0]) == 0x4A &&
- GETJOCTET(marker->data[1]) == 0x46 &&
- GETJOCTET(marker->data[2]) == 0x49 &&
- GETJOCTET(marker->data[3]) == 0x46 &&
- GETJOCTET(marker->data[4]) == 0)
- continue; /* reject duplicate JFIF */
- if (dstinfo->write_Adobe_marker &&
- marker->marker == JPEG_APP0+14 &&
- marker->data_length >= 5 &&
- GETJOCTET(marker->data[0]) == 0x41 &&
- GETJOCTET(marker->data[1]) == 0x64 &&
- GETJOCTET(marker->data[2]) == 0x6F &&
- GETJOCTET(marker->data[3]) == 0x62 &&
- GETJOCTET(marker->data[4]) == 0x65)
- continue; /* reject duplicate Adobe */
-#ifdef NEED_FAR_POINTERS
- /* We could use jpeg_write_marker if the data weren't FAR... */
- {
- unsigned int i;
- jpeg_write_m_header(dstinfo, marker->marker, marker->data_length);
- for (i = 0; i < marker->data_length; i++)
- jpeg_write_m_byte(dstinfo, marker->data[i]);
- }
-#else
- jpeg_write_marker(dstinfo, marker->marker,
- marker->data, marker->data_length);
-#endif
- }
-}
+++ /dev/null
-/*
- * transupp.h
- *
- * Copyright (C) 1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains declarations for image transformation routines and
- * other utility code used by the jpegtran sample application. These are
- * NOT part of the core JPEG library. But we keep these routines separate
- * from jpegtran.c to ease the task of maintaining jpegtran-like programs
- * that have other user interfaces.
- *
- * NOTE: all the routines declared here have very specific requirements
- * about when they are to be executed during the reading and writing of the
- * source and destination files. See the comments in transupp.c, or see
- * jpegtran.c for an example of correct usage.
- */
-
-/* If you happen not to want the image transform support, disable it here */
-#ifndef TRANSFORMS_SUPPORTED
-#define TRANSFORMS_SUPPORTED 1 /* 0 disables transform code */
-#endif
-
-/* Short forms of external names for systems with brain-damaged linkers. */
-
-#ifdef NEED_SHORT_EXTERNAL_NAMES
-#define jtransform_request_workspace jTrRequest
-#define jtransform_adjust_parameters jTrAdjust
-#define jtransform_execute_transformation jTrExec
-#define jcopy_markers_setup jCMrkSetup
-#define jcopy_markers_execute jCMrkExec
-#endif /* NEED_SHORT_EXTERNAL_NAMES */
-
-
-/*
- * Codes for supported types of image transformations.
- */
-
-typedef enum {
- JXFORM_NONE, /* no transformation */
- JXFORM_FLIP_H, /* horizontal flip */
- JXFORM_FLIP_V, /* vertical flip */
- JXFORM_TRANSPOSE, /* transpose across UL-to-LR axis */
- JXFORM_TRANSVERSE, /* transpose across UR-to-LL axis */
- JXFORM_ROT_90, /* 90-degree clockwise rotation */
- JXFORM_ROT_180, /* 180-degree rotation */
- JXFORM_ROT_270 /* 270-degree clockwise (or 90 ccw) */
-} JXFORM_CODE;
-
-/*
- * Although rotating and flipping data expressed as DCT coefficients is not
- * hard, there is an asymmetry in the JPEG format specification for images
- * whose dimensions aren't multiples of the iMCU size. The right and bottom
- * image edges are padded out to the next iMCU boundary with junk data; but
- * no padding is possible at the top and left edges. If we were to flip
- * the whole image including the pad data, then pad garbage would become
- * visible at the top and/or left, and real pixels would disappear into the
- * pad margins --- perhaps permanently, since encoders & decoders may not
- * bother to preserve DCT blocks that appear to be completely outside the
- * nominal image area. So, we have to exclude any partial iMCUs from the
- * basic transformation.
- *
- * Transpose is the only transformation that can handle partial iMCUs at the
- * right and bottom edges completely cleanly. flip_h can flip partial iMCUs
- * at the bottom, but leaves any partial iMCUs at the right edge untouched.
- * Similarly flip_v leaves any partial iMCUs at the bottom edge untouched.
- * The other transforms are defined as combinations of these basic transforms
- * and process edge blocks in a way that preserves the equivalence.
- *
- * The "trim" option causes untransformable partial iMCUs to be dropped;
- * this is not strictly lossless, but it usually gives the best-looking
- * result for odd-size images. Note that when this option is active,
- * the expected mathematical equivalences between the transforms may not hold.
- * (For example, -rot 270 -trim trims only the bottom edge, but -rot 90 -trim
- * followed by -rot 180 -trim trims both edges.)
- *
- * We also offer a "force to grayscale" option, which simply discards the
- * chrominance channels of a YCbCr image. This is lossless in the sense that
- * the luminance channel is preserved exactly. It's not the same kind of
- * thing as the rotate/flip transformations, but it's convenient to handle it
- * as part of this package, mainly because the transformation routines have to
- * be aware of the option to know how many components to work on.
- */
-
-typedef struct {
- /* Options: set by caller */
- JXFORM_CODE transform; /* image transform operator */
- boolean trim; /* if TRUE, trim partial MCUs as needed */
- boolean force_grayscale; /* if TRUE, convert color image to grayscale */
-
- /* Internal workspace: caller should not touch these */
- int num_components; /* # of components in workspace */
- jvirt_barray_ptr * workspace_coef_arrays; /* workspace for transformations */
-} jpeg_transform_info;
-
-
-#if TRANSFORMS_SUPPORTED
-
-/* Request any required workspace */
-EXTERN(void) jtransform_request_workspace
- JPP((j_decompress_ptr srcinfo, jpeg_transform_info *info));
-/* Adjust output image parameters */
-EXTERN(jvirt_barray_ptr *) jtransform_adjust_parameters
- JPP((j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jpeg_transform_info *info));
-/* Execute the actual transformation, if any */
-EXTERN(void) jtransform_execute_transformation
- JPP((j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- jvirt_barray_ptr *src_coef_arrays,
- jpeg_transform_info *info));
-
-#endif /* TRANSFORMS_SUPPORTED */
-
-
-/*
- * Support for copying optional markers from source to destination file.
- */
-
-typedef enum {
- JCOPYOPT_NONE, /* copy no optional markers */
- JCOPYOPT_COMMENTS, /* copy only comment (COM) markers */
- JCOPYOPT_ALL /* copy all optional markers */
-} JCOPY_OPTION;
-
-#define JCOPYOPT_DEFAULT JCOPYOPT_COMMENTS /* recommended default */
-
-/* Setup decompression object to save desired markers in memory */
-EXTERN(void) jcopy_markers_setup
- JPP((j_decompress_ptr srcinfo, JCOPY_OPTION option));
-/* Copy markers saved in the given source object to the destination object */
-EXTERN(void) jcopy_markers_execute
- JPP((j_decompress_ptr srcinfo, j_compress_ptr dstinfo,
- JCOPY_OPTION option));
+++ /dev/null
-USAGE instructions for the Independent JPEG Group's JPEG software
-=================================================================
-
-This file describes usage of the JPEG conversion programs cjpeg and djpeg,
-as well as the utility programs jpegtran, rdjpgcom and wrjpgcom. (See
-the other documentation files if you wish to use the JPEG library within
-your own programs.)
-
-If you are on a Unix machine you may prefer to read the Unix-style manual
-pages in files cjpeg.1, djpeg.1, jpegtran.1, rdjpgcom.1, wrjpgcom.1.
-
-
-INTRODUCTION
-
-These programs implement JPEG image compression and decompression. JPEG
-(pronounced "jay-peg") is a standardized compression method for full-color
-and gray-scale images. JPEG is designed to handle "real-world" scenes,
-for example scanned photographs. Cartoons, line drawings, and other
-non-realistic images are not JPEG's strong suit; on that sort of material
-you may get poor image quality and/or little compression.
-
-JPEG is lossy, meaning that the output image is not necessarily identical to
-the input image. Hence you should not use JPEG if you have to have identical
-output bits. However, on typical real-world images, very good compression
-levels can be obtained with no visible change, and amazingly high compression
-is possible if you can tolerate a low-quality image. You can trade off image
-quality against file size by adjusting the compressor's "quality" setting.
-
-
-GENERAL USAGE
-
-We provide two programs, cjpeg to compress an image file into JPEG format,
-and djpeg to decompress a JPEG file back into a conventional image format.
-
-On Unix-like systems, you say:
- cjpeg [switches] [imagefile] >jpegfile
-or
- djpeg [switches] [jpegfile] >imagefile
-The programs read the specified input file, or standard input if none is
-named. They always write to standard output (with trace/error messages to
-standard error). These conventions are handy for piping images between
-programs.
-
-On most non-Unix systems, you say:
- cjpeg [switches] imagefile jpegfile
-or
- djpeg [switches] jpegfile imagefile
-i.e., both the input and output files are named on the command line. This
-style is a little more foolproof, and it loses no functionality if you don't
-have pipes. (You can get this style on Unix too, if you prefer, by defining
-TWO_FILE_COMMANDLINE when you compile the programs; see install.doc.)
-
-You can also say:
- cjpeg [switches] -outfile jpegfile imagefile
-or
- djpeg [switches] -outfile imagefile jpegfile
-This syntax works on all systems, so it is useful for scripts.
-
-The currently supported image file formats are: PPM (PBMPLUS color format),
-PGM (PBMPLUS gray-scale format), BMP, Targa, and RLE (Utah Raster Toolkit
-format). (RLE is supported only if the URT library is available.)
-cjpeg recognizes the input image format automatically, with the exception
-of some Targa-format files. You have to tell djpeg which format to generate.
-
-JPEG files are in the defacto standard JFIF file format. There are other,
-less widely used JPEG-based file formats, but we don't support them.
-
-All switch names may be abbreviated; for example, -grayscale may be written
--gray or -gr. Most of the "basic" switches can be abbreviated to as little as
-one letter. Upper and lower case are equivalent (-BMP is the same as -bmp).
-British spellings are also accepted (e.g., -greyscale), though for brevity
-these are not mentioned below.
-
-
-CJPEG DETAILS
-
-The basic command line switches for cjpeg are:
-
- -quality N Scale quantization tables to adjust image quality.
- Quality is 0 (worst) to 100 (best); default is 75.
- (See below for more info.)
-
- -grayscale Create monochrome JPEG file from color input.
- Be sure to use this switch when compressing a grayscale
- BMP file, because cjpeg isn't bright enough to notice
- whether a BMP file uses only shades of gray. By
- saying -grayscale, you'll get a smaller JPEG file that
- takes less time to process.
-
- -optimize Perform optimization of entropy encoding parameters.
- Without this, default encoding parameters are used.
- -optimize usually makes the JPEG file a little smaller,
- but cjpeg runs somewhat slower and needs much more
- memory. Image quality and speed of decompression are
- unaffected by -optimize.
-
- -progressive Create progressive JPEG file (see below).
-
- -targa Input file is Targa format. Targa files that contain
- an "identification" field will not be automatically
- recognized by cjpeg; for such files you must specify
- -targa to make cjpeg treat the input as Targa format.
- For most Targa files, you won't need this switch.
-
-The -quality switch lets you trade off compressed file size against quality of
-the reconstructed image: the higher the quality setting, the larger the JPEG
-file, and the closer the output image will be to the original input. Normally
-you want to use the lowest quality setting (smallest file) that decompresses
-into something visually indistinguishable from the original image. For this
-purpose the quality setting should be between 50 and 95; the default of 75 is
-often about right. If you see defects at -quality 75, then go up 5 or 10
-counts at a time until you are happy with the output image. (The optimal
-setting will vary from one image to another.)
-
--quality 100 will generate a quantization table of all 1's, minimizing loss
-in the quantization step (but there is still information loss in subsampling,
-as well as roundoff error). This setting is mainly of interest for
-experimental purposes. Quality values above about 95 are NOT recommended for
-normal use; the compressed file size goes up dramatically for hardly any gain
-in output image quality.
-
-In the other direction, quality values below 50 will produce very small files
-of low image quality. Settings around 5 to 10 might be useful in preparing an
-index of a large image library, for example. Try -quality 2 (or so) for some
-amusing Cubist effects. (Note: quality values below about 25 generate 2-byte
-quantization tables, which are considered optional in the JPEG standard.
-cjpeg emits a warning message when you give such a quality value, because some
-other JPEG programs may be unable to decode the resulting file. Use -baseline
-if you need to ensure compatibility at low quality values.)
-
-The -progressive switch creates a "progressive JPEG" file. In this type of
-JPEG file, the data is stored in multiple scans of increasing quality. If the
-file is being transmitted over a slow communications link, the decoder can use
-the first scan to display a low-quality image very quickly, and can then
-improve the display with each subsequent scan. The final image is exactly
-equivalent to a standard JPEG file of the same quality setting, and the total
-file size is about the same --- often a little smaller. CAUTION: progressive
-JPEG is not yet widely implemented, so many decoders will be unable to view a
-progressive JPEG file at all.
-
-Switches for advanced users:
-
- -dct int Use integer DCT method (default).
- -dct fast Use fast integer DCT (less accurate).
- -dct float Use floating-point DCT method.
- The float method is very slightly more accurate than
- the int method, but is much slower unless your machine
- has very fast floating-point hardware. Also note that
- results of the floating-point method may vary slightly
- across machines, while the integer methods should give
- the same results everywhere. The fast integer method
- is much less accurate than the other two.
-
- -restart N Emit a JPEG restart marker every N MCU rows, or every
- N MCU blocks if "B" is attached to the number.
- -restart 0 (the default) means no restart markers.
-
- -smooth N Smooth the input image to eliminate dithering noise.
- N, ranging from 1 to 100, indicates the strength of
- smoothing. 0 (the default) means no smoothing.
-
- -maxmemory N Set limit for amount of memory to use in processing
- large images. Value is in thousands of bytes, or
- millions of bytes if "M" is attached to the number.
- For example, -max 4m selects 4000000 bytes. If more
- space is needed, temporary files will be used.
-
- -verbose Enable debug printout. More -v's give more printout.
- or -debug Also, version information is printed at startup.
-
-The -restart option inserts extra markers that allow a JPEG decoder to
-resynchronize after a transmission error. Without restart markers, any damage
-to a compressed file will usually ruin the image from the point of the error
-to the end of the image; with restart markers, the damage is usually confined
-to the portion of the image up to the next restart marker. Of course, the
-restart markers occupy extra space. We recommend -restart 1 for images that
-will be transmitted across unreliable networks such as Usenet.
-
-The -smooth option filters the input to eliminate fine-scale noise. This is
-often useful when converting dithered images to JPEG: a moderate smoothing
-factor of 10 to 50 gets rid of dithering patterns in the input file, resulting
-in a smaller JPEG file and a better-looking image. Too large a smoothing
-factor will visibly blur the image, however.
-
-Switches for wizards:
-
- -baseline Force baseline-compatible quantization tables to be
- generated. This clamps quantization values to 8 bits
- even at low quality settings. (This switch is poorly
- named, since it does not ensure that the output is
- actually baseline JPEG. For example, you can use
- -baseline and -progressive together.)
-
- -qtables file Use the quantization tables given in the specified
- text file.
-
- -qslots N[,...] Select which quantization table to use for each color
- component.
-
- -sample HxV[,...] Set JPEG sampling factors for each color component.
-
- -scans file Use the scan script given in the specified text file.
-
-The "wizard" switches are intended for experimentation with JPEG. If you
-don't know what you are doing, DON'T USE THEM. These switches are documented
-further in the file wizard.doc.
-
-
-DJPEG DETAILS
-
-The basic command line switches for djpeg are:
-
- -colors N Reduce image to at most N colors. This reduces the
- or -quantize N number of colors used in the output image, so that it
- can be displayed on a colormapped display or stored in
- a colormapped file format. For example, if you have
- an 8-bit display, you'd need to reduce to 256 or fewer
- colors. (-colors is the recommended name, -quantize
- is provided only for backwards compatibility.)
-
- -fast Select recommended processing options for fast, low
- quality output. (The default options are chosen for
- highest quality output.) Currently, this is equivalent
- to "-dct fast -nosmooth -onepass -dither ordered".
-
- -grayscale Force gray-scale output even if JPEG file is color.
- Useful for viewing on monochrome displays; also,
- djpeg runs noticeably faster in this mode.
-
- -scale M/N Scale the output image by a factor M/N. Currently
- the scale factor must be 1/1, 1/2, 1/4, or 1/8.
- Scaling is handy if the image is larger than your
- screen; also, djpeg runs much faster when scaling
- down the output.
-
- -bmp Select BMP output format (Windows flavor). 8-bit
- colormapped format is emitted if -colors or -grayscale
- is specified, or if the JPEG file is gray-scale;
- otherwise, 24-bit full-color format is emitted.
-
- -gif Select GIF output format. Since GIF does not support
- more than 256 colors, -colors 256 is assumed (unless
- you specify a smaller number of colors). If you
- specify -fast, the default number of colors is 216.
-
- -os2 Select BMP output format (OS/2 1.x flavor). 8-bit
- colormapped format is emitted if -colors or -grayscale
- is specified, or if the JPEG file is gray-scale;
- otherwise, 24-bit full-color format is emitted.
-
- -pnm Select PBMPLUS (PPM/PGM) output format (this is the
- default format). PGM is emitted if the JPEG file is
- gray-scale or if -grayscale is specified; otherwise
- PPM is emitted.
-
- -rle Select RLE output format. (Requires URT library.)
-
- -targa Select Targa output format. Gray-scale format is
- emitted if the JPEG file is gray-scale or if
- -grayscale is specified; otherwise, colormapped format
- is emitted if -colors is specified; otherwise, 24-bit
- full-color format is emitted.
-
-Switches for advanced users:
-
- -dct int Use integer DCT method (default).
- -dct fast Use fast integer DCT (less accurate).
- -dct float Use floating-point DCT method.
- The float method is very slightly more accurate than
- the int method, but is much slower unless your machine
- has very fast floating-point hardware. Also note that
- results of the floating-point method may vary slightly
- across machines, while the integer methods should give
- the same results everywhere. The fast integer method
- is much less accurate than the other two.
-
- -dither fs Use Floyd-Steinberg dithering in color quantization.
- -dither ordered Use ordered dithering in color quantization.
- -dither none Do not use dithering in color quantization.
- By default, Floyd-Steinberg dithering is applied when
- quantizing colors; this is slow but usually produces
- the best results. Ordered dither is a compromise
- between speed and quality; no dithering is fast but
- usually looks awful. Note that these switches have
- no effect unless color quantization is being done.
- Ordered dither is only available in -onepass mode.
-
- -map FILE Quantize to the colors used in the specified image
- file. This is useful for producing multiple files
- with identical color maps, or for forcing a predefined
- set of colors to be used. The FILE must be a GIF
- or PPM file. This option overrides -colors and
- -onepass.
-
- -nosmooth Use a faster, lower-quality upsampling routine.
-
- -onepass Use one-pass instead of two-pass color quantization.
- The one-pass method is faster and needs less memory,
- but it produces a lower-quality image. -onepass is
- ignored unless you also say -colors N. Also,
- the one-pass method is always used for gray-scale
- output (the two-pass method is no improvement then).
-
- -maxmemory N Set limit for amount of memory to use in processing
- large images. Value is in thousands of bytes, or
- millions of bytes if "M" is attached to the number.
- For example, -max 4m selects 4000000 bytes. If more
- space is needed, temporary files will be used.
-
- -verbose Enable debug printout. More -v's give more printout.
- or -debug Also, version information is printed at startup.
-
-
-HINTS FOR CJPEG
-
-Color GIF files are not the ideal input for JPEG; JPEG is really intended for
-compressing full-color (24-bit) images. In particular, don't try to convert
-cartoons, line drawings, and other images that have only a few distinct
-colors. GIF works great on these, JPEG does not. If you want to convert a
-GIF to JPEG, you should experiment with cjpeg's -quality and -smooth options
-to get a satisfactory conversion. -smooth 10 or so is often helpful.
-
-Avoid running an image through a series of JPEG compression/decompression
-cycles. Image quality loss will accumulate; after ten or so cycles the image
-may be noticeably worse than it was after one cycle. It's best to use a
-lossless format while manipulating an image, then convert to JPEG format when
-you are ready to file the image away.
-
-The -optimize option to cjpeg is worth using when you are making a "final"
-version for posting or archiving. It's also a win when you are using low
-quality settings to make very small JPEG files; the percentage improvement
-is often a lot more than it is on larger files. (At present, -optimize
-mode is always selected when generating progressive JPEG files.)
-
-GIF input files are no longer supported, to avoid the Unisys LZW patent.
-Use a Unisys-licensed program if you need to read a GIF file. (Conversion
-of GIF files to JPEG is usually a bad idea anyway.)
-
-
-HINTS FOR DJPEG
-
-To get a quick preview of an image, use the -grayscale and/or -scale switches.
-"-grayscale -scale 1/8" is the fastest case.
-
-Several options are available that trade off image quality to gain speed.
-"-fast" turns on the recommended settings.
-
-"-dct fast" and/or "-nosmooth" gain speed at a small sacrifice in quality.
-When producing a color-quantized image, "-onepass -dither ordered" is fast but
-much lower quality than the default behavior. "-dither none" may give
-acceptable results in two-pass mode, but is seldom tolerable in one-pass mode.
-
-If you are fortunate enough to have very fast floating point hardware,
-"-dct float" may be even faster than "-dct fast". But on most machines
-"-dct float" is slower than "-dct int"; in this case it is not worth using,
-because its theoretical accuracy advantage is too small to be significant
-in practice.
-
-Two-pass color quantization requires a good deal of memory; on MS-DOS machines
-it may run out of memory even with -maxmemory 0. In that case you can still
-decompress, with some loss of image quality, by specifying -onepass for
-one-pass quantization.
-
-To avoid the Unisys LZW patent, djpeg produces uncompressed GIF files. These
-are larger than they should be, but are readable by standard GIF decoders.
-
-
-HINTS FOR BOTH PROGRAMS
-
-If more space is needed than will fit in the available main memory (as
-determined by -maxmemory), temporary files will be used. (MS-DOS versions
-will try to get extended or expanded memory first.) The temporary files are
-often rather large: in typical cases they occupy three bytes per pixel, for
-example 3*800*600 = 1.44Mb for an 800x600 image. If you don't have enough
-free disk space, leave out -progressive and -optimize (for cjpeg) or specify
--onepass (for djpeg).
-
-On MS-DOS, the temporary files are created in the directory named by the TMP
-or TEMP environment variable, or in the current directory if neither of those
-exist. Amiga implementations put the temp files in the directory named by
-JPEGTMP:, so be sure to assign JPEGTMP: to a disk partition with adequate free
-space.
-
-The default memory usage limit (-maxmemory) is set when the software is
-compiled. If you get an "insufficient memory" error, try specifying a smaller
--maxmemory value, even -maxmemory 0 to use the absolute minimum space. You
-may want to recompile with a smaller default value if this happens often.
-
-On machines that have "environment" variables, you can define the environment
-variable JPEGMEM to set the default memory limit. The value is specified as
-described for the -maxmemory switch. JPEGMEM overrides the default value
-specified when the program was compiled, and itself is overridden by an
-explicit -maxmemory switch.
-
-On MS-DOS machines, -maxmemory is the amount of main (conventional) memory to
-use. (Extended or expanded memory is also used if available.) Most
-DOS-specific versions of this software do their own memory space estimation
-and do not need you to specify -maxmemory.
-
-
-JPEGTRAN
-
-jpegtran performs various useful transformations of JPEG files.
-It can translate the coded representation from one variant of JPEG to another,
-for example from baseline JPEG to progressive JPEG or vice versa. It can also
-perform some rearrangements of the image data, for example turning an image
-from landscape to portrait format by rotation.
-
-jpegtran works by rearranging the compressed data (DCT coefficients), without
-ever fully decoding the image. Therefore, its transformations are lossless:
-there is no image degradation at all, which would not be true if you used
-djpeg followed by cjpeg to accomplish the same conversion. But by the same
-token, jpegtran cannot perform lossy operations such as changing the image
-quality.
-
-jpegtran uses a command line syntax similar to cjpeg or djpeg.
-On Unix-like systems, you say:
- jpegtran [switches] [inputfile] >outputfile
-On most non-Unix systems, you say:
- jpegtran [switches] inputfile outputfile
-where both the input and output files are JPEG files.
-
-To specify the coded JPEG representation used in the output file,
-jpegtran accepts a subset of the switches recognized by cjpeg:
- -optimize Perform optimization of entropy encoding parameters.
- -progressive Create progressive JPEG file.
- -restart N Emit a JPEG restart marker every N MCU rows, or every
- N MCU blocks if "B" is attached to the number.
- -scans file Use the scan script given in the specified text file.
-See the previous discussion of cjpeg for more details about these switches.
-If you specify none of these switches, you get a plain baseline-JPEG output
-file. The quality setting and so forth are determined by the input file.
-
-The image can be losslessly transformed by giving one of these switches:
- -flip horizontal Mirror image horizontally (left-right).
- -flip vertical Mirror image vertically (top-bottom).
- -rotate 90 Rotate image 90 degrees clockwise.
- -rotate 180 Rotate image 180 degrees.
- -rotate 270 Rotate image 270 degrees clockwise (or 90 ccw).
- -transpose Transpose image (across UL-to-LR axis).
- -transverse Transverse transpose (across UR-to-LL axis).
-
-The transpose transformation has no restrictions regarding image dimensions.
-The other transformations operate rather oddly if the image dimensions are not
-a multiple of the iMCU size (usually 8 or 16 pixels), because they can only
-transform complete blocks of DCT coefficient data in the desired way.
-
-jpegtran's default behavior when transforming an odd-size image is designed
-to preserve exact reversibility and mathematical consistency of the
-transformation set. As stated, transpose is able to flip the entire image
-area. Horizontal mirroring leaves any partial iMCU column at the right edge
-untouched, but is able to flip all rows of the image. Similarly, vertical
-mirroring leaves any partial iMCU row at the bottom edge untouched, but is
-able to flip all columns. The other transforms can be built up as sequences
-of transpose and flip operations; for consistency, their actions on edge
-pixels are defined to be the same as the end result of the corresponding
-transpose-and-flip sequence.
-
-For practical use, you may prefer to discard any untransformable edge pixels
-rather than having a strange-looking strip along the right and/or bottom edges
-of a transformed image. To do this, add the -trim switch:
- -trim Drop non-transformable edge blocks.
-Obviously, a transformation with -trim is not reversible, so strictly speaking
-jpegtran with this switch is not lossless. Also, the expected mathematical
-equivalences between the transformations no longer hold. For example,
-"-rot 270 -trim" trims only the bottom edge, but "-rot 90 -trim" followed by
-"-rot 180 -trim" trims both edges.
-
-Another not-strictly-lossless transformation switch is:
- -grayscale Force grayscale output.
-This option discards the chrominance channels if the input image is YCbCr
-(ie, a standard color JPEG), resulting in a grayscale JPEG file. The
-luminance channel is preserved exactly, so this is a better method of reducing
-to grayscale than decompression, conversion, and recompression. This switch
-is particularly handy for fixing a monochrome picture that was mistakenly
-encoded as a color JPEG. (In such a case, the space savings from getting rid
-of the near-empty chroma channels won't be large; but the decoding time for
-a grayscale JPEG is substantially less than that for a color JPEG.)
-
-jpegtran also recognizes these switches that control what to do with "extra"
-markers, such as comment blocks:
- -copy none Copy no extra markers from source file. This setting
- suppresses all comments and other excess baggage
- present in the source file.
- -copy comments Copy only comment markers. This setting copies
- comments from the source file, but discards
- any other inessential data.
- -copy all Copy all extra markers. This setting preserves
- miscellaneous markers found in the source file, such
- as JFIF thumbnails and Photoshop settings. In some
- files these extra markers can be sizable.
-The default behavior is -copy comments. (Note: in IJG releases v6 and v6a,
-jpegtran always did the equivalent of -copy none.)
-
-Additional switches recognized by jpegtran are:
- -outfile filename
- -maxmemory N
- -verbose
- -debug
-These work the same as in cjpeg or djpeg.
-
-
-THE COMMENT UTILITIES
-
-The JPEG standard allows "comment" (COM) blocks to occur within a JPEG file.
-Although the standard doesn't actually define what COM blocks are for, they
-are widely used to hold user-supplied text strings. This lets you add
-annotations, titles, index terms, etc to your JPEG files, and later retrieve
-them as text. COM blocks do not interfere with the image stored in the JPEG
-file. The maximum size of a COM block is 64K, but you can have as many of
-them as you like in one JPEG file.
-
-We provide two utility programs to display COM block contents and add COM
-blocks to a JPEG file.
-
-rdjpgcom searches a JPEG file and prints the contents of any COM blocks on
-standard output. The command line syntax is
- rdjpgcom [-verbose] [inputfilename]
-The switch "-verbose" (or just "-v") causes rdjpgcom to also display the JPEG
-image dimensions. If you omit the input file name from the command line,
-the JPEG file is read from standard input. (This may not work on some
-operating systems, if binary data can't be read from stdin.)
-
-wrjpgcom adds a COM block, containing text you provide, to a JPEG file.
-Ordinarily, the COM block is added after any existing COM blocks, but you
-can delete the old COM blocks if you wish. wrjpgcom produces a new JPEG
-file; it does not modify the input file. DO NOT try to overwrite the input
-file by directing wrjpgcom's output back into it; on most systems this will
-just destroy your file.
-
-The command line syntax for wrjpgcom is similar to cjpeg's. On Unix-like
-systems, it is
- wrjpgcom [switches] [inputfilename]
-The output file is written to standard output. The input file comes from
-the named file, or from standard input if no input file is named.
-
-On most non-Unix systems, the syntax is
- wrjpgcom [switches] inputfilename outputfilename
-where both input and output file names must be given explicitly.
-
-wrjpgcom understands three switches:
- -replace Delete any existing COM blocks from the file.
- -comment "Comment text" Supply new COM text on command line.
- -cfile name Read text for new COM block from named file.
-(Switch names can be abbreviated.) If you have only one line of comment text
-to add, you can provide it on the command line with -comment. The comment
-text must be surrounded with quotes so that it is treated as a single
-argument. Longer comments can be read from a text file.
-
-If you give neither -comment nor -cfile, then wrjpgcom will read the comment
-text from standard input. (In this case an input image file name MUST be
-supplied, so that the source JPEG file comes from somewhere else.) You can
-enter multiple lines, up to 64KB worth. Type an end-of-file indicator
-(usually control-D or control-Z) to terminate the comment text entry.
-
-wrjpgcom will not add a COM block if the provided comment string is empty.
-Therefore -replace -comment "" can be used to delete all COM blocks from a
-file.
-
-These utility programs do not depend on the IJG JPEG library. In
-particular, the source code for rdjpgcom is intended as an illustration of
-the minimum amount of code required to parse a JPEG file header correctly.
+++ /dev/null
-Advanced usage instructions for the Independent JPEG Group's JPEG software
-==========================================================================
-
-This file describes cjpeg's "switches for wizards".
-
-The "wizard" switches are intended for experimentation with JPEG by persons
-who are reasonably knowledgeable about the JPEG standard. If you don't know
-what you are doing, DON'T USE THESE SWITCHES. You'll likely produce files
-with worse image quality and/or poorer compression than you'd get from the
-default settings. Furthermore, these switches must be used with caution
-when making files intended for general use, because not all JPEG decoders
-will support unusual JPEG parameter settings.
-
-
-Quantization Table Adjustment
------------------------------
-
-Ordinarily, cjpeg starts with a default set of tables (the same ones given
-as examples in the JPEG standard) and scales them up or down according to
-the -quality setting. The details of the scaling algorithm can be found in
-jcparam.c. At very low quality settings, some quantization table entries
-can get scaled up to values exceeding 255. Although 2-byte quantization
-values are supported by the IJG software, this feature is not in baseline
-JPEG and is not supported by all implementations. If you need to ensure
-wide compatibility of low-quality files, you can constrain the scaled
-quantization values to no more than 255 by giving the -baseline switch.
-Note that use of -baseline will result in poorer quality for the same file
-size, since more bits than necessary are expended on higher AC coefficients.
-
-You can substitute a different set of quantization values by using the
--qtables switch:
-
- -qtables file Use the quantization tables given in the named file.
-
-The specified file should be a text file containing decimal quantization
-values. The file should contain one to four tables, each of 64 elements.
-The tables are implicitly numbered 0,1,etc. in order of appearance. Table
-entries appear in normal array order (NOT in the zigzag order in which they
-will be stored in the JPEG file).
-
-Quantization table files are free format, in that arbitrary whitespace can
-appear between numbers. Also, comments can be included: a comment starts
-with '#' and extends to the end of the line. Here is an example file that
-duplicates the default quantization tables:
-
- # Quantization tables given in JPEG spec, section K.1
-
- # This is table 0 (the luminance table):
- 16 11 10 16 24 40 51 61
- 12 12 14 19 26 58 60 55
- 14 13 16 24 40 57 69 56
- 14 17 22 29 51 87 80 62
- 18 22 37 56 68 109 103 77
- 24 35 55 64 81 104 113 92
- 49 64 78 87 103 121 120 101
- 72 92 95 98 112 100 103 99
-
- # This is table 1 (the chrominance table):
- 17 18 24 47 99 99 99 99
- 18 21 26 66 99 99 99 99
- 24 26 56 99 99 99 99 99
- 47 66 99 99 99 99 99 99
- 99 99 99 99 99 99 99 99
- 99 99 99 99 99 99 99 99
- 99 99 99 99 99 99 99 99
- 99 99 99 99 99 99 99 99
-
-If the -qtables switch is used without -quality, then the specified tables
-are used exactly as-is. If both -qtables and -quality are used, then the
-tables taken from the file are scaled in the same fashion that the default
-tables would be scaled for that quality setting. If -baseline appears, then
-the quantization values are constrained to the range 1-255.
-
-By default, cjpeg will use quantization table 0 for luminance components and
-table 1 for chrominance components. To override this choice, use the -qslots
-switch:
-
- -qslots N[,...] Select which quantization table to use for
- each color component.
-
-The -qslots switch specifies a quantization table number for each color
-component, in the order in which the components appear in the JPEG SOF marker.
-For example, to create a separate table for each of Y,Cb,Cr, you could
-provide a -qtables file that defines three quantization tables and say
-"-qslots 0,1,2". If -qslots gives fewer table numbers than there are color
-components, then the last table number is repeated as necessary.
-
-
-Sampling Factor Adjustment
---------------------------
-
-By default, cjpeg uses 2:1 horizontal and vertical downsampling when
-compressing YCbCr data, and no downsampling for all other color spaces.
-You can override this default with the -sample switch:
-
- -sample HxV[,...] Set JPEG sampling factors for each color
- component.
-
-The -sample switch specifies the JPEG sampling factors for each color
-component, in the order in which they appear in the JPEG SOF marker.
-If you specify fewer HxV pairs than there are components, the remaining
-components are set to 1x1 sampling. For example, the default YCbCr setting
-is equivalent to "-sample 2x2,1x1,1x1", which can be abbreviated to
-"-sample 2x2".
-
-There are still some JPEG decoders in existence that support only 2x1
-sampling (also called 4:2:2 sampling). Compatibility with such decoders can
-be achieved by specifying "-sample 2x1". This is not recommended unless
-really necessary, since it increases file size and encoding/decoding time
-with very little quality gain.
-
-
-Multiple Scan / Progression Control
------------------------------------
-
-By default, cjpeg emits a single-scan sequential JPEG file. The
--progressive switch generates a progressive JPEG file using a default series
-of progression parameters. You can create multiple-scan sequential JPEG
-files or progressive JPEG files with custom progression parameters by using
-the -scans switch:
-
- -scans file Use the scan sequence given in the named file.
-
-The specified file should be a text file containing a "scan script".
-The script specifies the contents and ordering of the scans to be emitted.
-Each entry in the script defines one scan. A scan definition specifies
-the components to be included in the scan, and for progressive JPEG it also
-specifies the progression parameters Ss,Se,Ah,Al for the scan. Scan
-definitions are separated by semicolons (';'). A semicolon after the last
-scan definition is optional.
-
-Each scan definition contains one to four component indexes, optionally
-followed by a colon (':') and the four progressive-JPEG parameters. The
-component indexes denote which color component(s) are to be transmitted in
-the scan. Components are numbered in the order in which they appear in the
-JPEG SOF marker, with the first component being numbered 0. (Note that these
-indexes are not the "component ID" codes assigned to the components, just
-positional indexes.)
-
-The progression parameters for each scan are:
- Ss Zigzag index of first coefficient included in scan
- Se Zigzag index of last coefficient included in scan
- Ah Zero for first scan of a coefficient, else Al of prior scan
- Al Successive approximation low bit position for scan
-If the progression parameters are omitted, the values 0,63,0,0 are used,
-producing a sequential JPEG file. cjpeg automatically determines whether
-the script represents a progressive or sequential file, by observing whether
-Ss and Se values other than 0 and 63 appear. (The -progressive switch is
-not needed to specify this; in fact, it is ignored when -scans appears.)
-The scan script must meet the JPEG restrictions on progression sequences.
-(cjpeg checks that the spec's requirements are obeyed.)
-
-Scan script files are free format, in that arbitrary whitespace can appear
-between numbers and around punctuation. Also, comments can be included: a
-comment starts with '#' and extends to the end of the line. For additional
-legibility, commas or dashes can be placed between values. (Actually, any
-single punctuation character other than ':' or ';' can be inserted.) For
-example, the following two scan definitions are equivalent:
- 0 1 2: 0 63 0 0;
- 0,1,2 : 0-63, 0,0 ;
-
-Here is an example of a scan script that generates a partially interleaved
-sequential JPEG file:
-
- 0; # Y only in first scan
- 1 2; # Cb and Cr in second scan
-
-Here is an example of a progressive scan script using only spectral selection
-(no successive approximation):
-
- # Interleaved DC scan for Y,Cb,Cr:
- 0,1,2: 0-0, 0, 0 ;
- # AC scans:
- 0: 1-2, 0, 0 ; # First two Y AC coefficients
- 0: 3-5, 0, 0 ; # Three more
- 1: 1-63, 0, 0 ; # All AC coefficients for Cb
- 2: 1-63, 0, 0 ; # All AC coefficients for Cr
- 0: 6-9, 0, 0 ; # More Y coefficients
- 0: 10-63, 0, 0 ; # Remaining Y coefficients
-
-Here is an example of a successive-approximation script. This is equivalent
-to the default script used by "cjpeg -progressive" for YCbCr images:
-
- # Initial DC scan for Y,Cb,Cr (lowest bit not sent)
- 0,1,2: 0-0, 0, 1 ;
- # First AC scan: send first 5 Y AC coefficients, minus 2 lowest bits:
- 0: 1-5, 0, 2 ;
- # Send all Cr,Cb AC coefficients, minus lowest bit:
- # (chroma data is usually too small to be worth subdividing further;
- # but note we send Cr first since eye is least sensitive to Cb)
- 2: 1-63, 0, 1 ;
- 1: 1-63, 0, 1 ;
- # Send remaining Y AC coefficients, minus 2 lowest bits:
- 0: 6-63, 0, 2 ;
- # Send next-to-lowest bit of all Y AC coefficients:
- 0: 1-63, 2, 1 ;
- # At this point we've sent all but the lowest bit of all coefficients.
- # Send lowest bit of DC coefficients
- 0,1,2: 0-0, 1, 0 ;
- # Send lowest bit of AC coefficients
- 2: 1-63, 1, 0 ;
- 1: 1-63, 1, 0 ;
- # Y AC lowest bit scan is last; it's usually the largest scan
- 0: 1-63, 1, 0 ;
-
-It may be worth pointing out that this script is tuned for quality settings
-of around 50 to 75. For lower quality settings, you'd probably want to use
-a script with fewer stages of successive approximation (otherwise the
-initial scans will be really bad). For higher quality settings, you might
-want to use more stages of successive approximation (so that the initial
-scans are not too large).
+++ /dev/null
-/*
- * wrbmp.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to write output images in Microsoft "BMP"
- * format (MS Windows 3.x and OS/2 1.x flavors).
- * Either 8-bit colormapped or 24-bit full-color format can be written.
- * No compression is supported.
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume output to
- * an ordinary stdio stream.
- *
- * This code contributed by James Arthur Boucher.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef BMP_SUPPORTED
-
-
-/*
- * To support 12-bit JPEG data, we'd have to scale output down to 8 bits.
- * This is not yet implemented.
- */
-
-#if BITS_IN_JSAMPLE != 8
- Sorry, this code only copes with 8-bit JSAMPLEs. /* deliberate syntax err */
-#endif
-
-/*
- * Since BMP stores scanlines bottom-to-top, we have to invert the image
- * from JPEG's top-to-bottom order. To do this, we save the outgoing data
- * in a virtual array during put_pixel_row calls, then actually emit the
- * BMP file during finish_output. The virtual array contains one JSAMPLE per
- * pixel if the output is grayscale or colormapped, three if it is full color.
- */
-
-/* Private version of data destination object */
-
-typedef struct {
- struct djpeg_dest_struct pub; /* public fields */
-
- boolean is_os2; /* saves the OS2 format request flag */
-
- jvirt_sarray_ptr whole_image; /* needed to reverse row order */
- JDIMENSION data_width; /* JSAMPLEs per row */
- JDIMENSION row_width; /* physical width of one row in the BMP file */
- int pad_bytes; /* number of padding bytes needed per row */
- JDIMENSION cur_output_row; /* next row# to write to virtual array */
-} bmp_dest_struct;
-
-typedef bmp_dest_struct * bmp_dest_ptr;
-
-
-/* Forward declarations */
-LOCAL(void) write_colormap
- JPP((j_decompress_ptr cinfo, bmp_dest_ptr dest,
- int map_colors, int map_entry_size));
-
-
-/*
- * Write some pixel data.
- * In this module rows_supplied will always be 1.
- */
-
-METHODDEF(void)
-put_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-/* This version is for writing 24-bit pixels */
-{
- bmp_dest_ptr dest = (bmp_dest_ptr) dinfo;
- JSAMPARRAY image_ptr;
- register JSAMPROW inptr, outptr;
- register JDIMENSION col;
- int pad;
-
- /* Access next row in virtual array */
- image_ptr = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->whole_image,
- dest->cur_output_row, (JDIMENSION) 1, TRUE);
- dest->cur_output_row++;
-
- /* Transfer data. Note destination values must be in BGR order
- * (even though Microsoft's own documents say the opposite).
- */
- inptr = dest->pub.buffer[0];
- outptr = image_ptr[0];
- for (col = cinfo->output_width; col > 0; col--) {
- outptr[2] = *inptr++; /* can omit GETJSAMPLE() safely */
- outptr[1] = *inptr++;
- outptr[0] = *inptr++;
- outptr += 3;
- }
-
- /* Zero out the pad bytes. */
- pad = dest->pad_bytes;
- while (--pad >= 0)
- *outptr++ = 0;
-}
-
-METHODDEF(void)
-put_gray_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-/* This version is for grayscale OR quantized color output */
-{
- bmp_dest_ptr dest = (bmp_dest_ptr) dinfo;
- JSAMPARRAY image_ptr;
- register JSAMPROW inptr, outptr;
- register JDIMENSION col;
- int pad;
-
- /* Access next row in virtual array */
- image_ptr = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->whole_image,
- dest->cur_output_row, (JDIMENSION) 1, TRUE);
- dest->cur_output_row++;
-
- /* Transfer data. */
- inptr = dest->pub.buffer[0];
- outptr = image_ptr[0];
- for (col = cinfo->output_width; col > 0; col--) {
- *outptr++ = *inptr++; /* can omit GETJSAMPLE() safely */
- }
-
- /* Zero out the pad bytes. */
- pad = dest->pad_bytes;
- while (--pad >= 0)
- *outptr++ = 0;
-}
-
-
-/*
- * Startup: normally writes the file header.
- * In this module we may as well postpone everything until finish_output.
- */
-
-METHODDEF(void)
-start_output_bmp (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- /* no work here */
-}
-
-
-/*
- * Finish up at the end of the file.
- *
- * Here is where we really output the BMP file.
- *
- * First, routines to write the Windows and OS/2 variants of the file header.
- */
-
-LOCAL(void)
-write_bmp_header (j_decompress_ptr cinfo, bmp_dest_ptr dest)
-/* Write a Windows-style BMP file header, including colormap if needed */
-{
- char bmpfileheader[14];
- char bmpinfoheader[40];
-#define PUT_2B(array,offset,value) \
- (array[offset] = (char) ((value) & 0xFF), \
- array[offset+1] = (char) (((value) >> 8) & 0xFF))
-#define PUT_4B(array,offset,value) \
- (array[offset] = (char) ((value) & 0xFF), \
- array[offset+1] = (char) (((value) >> 8) & 0xFF), \
- array[offset+2] = (char) (((value) >> 16) & 0xFF), \
- array[offset+3] = (char) (((value) >> 24) & 0xFF))
- INT32 headersize, bfSize;
- int bits_per_pixel, cmap_entries;
-
- /* Compute colormap size and total file size */
- if (cinfo->out_color_space == JCS_RGB) {
- if (cinfo->quantize_colors) {
- /* Colormapped RGB */
- bits_per_pixel = 8;
- cmap_entries = 256;
- } else {
- /* Unquantized, full color RGB */
- bits_per_pixel = 24;
- cmap_entries = 0;
- }
- } else {
- /* Grayscale output. We need to fake a 256-entry colormap. */
- bits_per_pixel = 8;
- cmap_entries = 256;
- }
- /* File size */
- headersize = 14 + 40 + cmap_entries * 4; /* Header and colormap */
- bfSize = headersize + (INT32) dest->row_width * (INT32) cinfo->output_height;
-
- /* Set unused fields of header to 0 */
- MEMZERO(bmpfileheader, SIZEOF(bmpfileheader));
- MEMZERO(bmpinfoheader, SIZEOF(bmpinfoheader));
-
- /* Fill the file header */
- bmpfileheader[0] = 0x42; /* first 2 bytes are ASCII 'B', 'M' */
- bmpfileheader[1] = 0x4D;
- PUT_4B(bmpfileheader, 2, bfSize); /* bfSize */
- /* we leave bfReserved1 & bfReserved2 = 0 */
- PUT_4B(bmpfileheader, 10, headersize); /* bfOffBits */
-
- /* Fill the info header (Microsoft calls this a BITMAPINFOHEADER) */
- PUT_2B(bmpinfoheader, 0, 40); /* biSize */
- PUT_4B(bmpinfoheader, 4, cinfo->output_width); /* biWidth */
- PUT_4B(bmpinfoheader, 8, cinfo->output_height); /* biHeight */
- PUT_2B(bmpinfoheader, 12, 1); /* biPlanes - must be 1 */
- PUT_2B(bmpinfoheader, 14, bits_per_pixel); /* biBitCount */
- /* we leave biCompression = 0, for none */
- /* we leave biSizeImage = 0; this is correct for uncompressed data */
- if (cinfo->density_unit == 2) { /* if have density in dots/cm, then */
- PUT_4B(bmpinfoheader, 24, (INT32) (cinfo->X_density*100)); /* XPels/M */
- PUT_4B(bmpinfoheader, 28, (INT32) (cinfo->Y_density*100)); /* XPels/M */
- }
- PUT_2B(bmpinfoheader, 32, cmap_entries); /* biClrUsed */
- /* we leave biClrImportant = 0 */
-
- if (JFWRITE(dest->pub.output_file, bmpfileheader, 14) != (size_t) 14)
- ERREXIT(cinfo, JERR_FILE_WRITE);
- if (JFWRITE(dest->pub.output_file, bmpinfoheader, 40) != (size_t) 40)
- ERREXIT(cinfo, JERR_FILE_WRITE);
-
- if (cmap_entries > 0)
- write_colormap(cinfo, dest, cmap_entries, 4);
-}
-
-
-LOCAL(void)
-write_os2_header (j_decompress_ptr cinfo, bmp_dest_ptr dest)
-/* Write an OS2-style BMP file header, including colormap if needed */
-{
- char bmpfileheader[14];
- char bmpcoreheader[12];
- INT32 headersize, bfSize;
- int bits_per_pixel, cmap_entries;
-
- /* Compute colormap size and total file size */
- if (cinfo->out_color_space == JCS_RGB) {
- if (cinfo->quantize_colors) {
- /* Colormapped RGB */
- bits_per_pixel = 8;
- cmap_entries = 256;
- } else {
- /* Unquantized, full color RGB */
- bits_per_pixel = 24;
- cmap_entries = 0;
- }
- } else {
- /* Grayscale output. We need to fake a 256-entry colormap. */
- bits_per_pixel = 8;
- cmap_entries = 256;
- }
- /* File size */
- headersize = 14 + 12 + cmap_entries * 3; /* Header and colormap */
- bfSize = headersize + (INT32) dest->row_width * (INT32) cinfo->output_height;
-
- /* Set unused fields of header to 0 */
- MEMZERO(bmpfileheader, SIZEOF(bmpfileheader));
- MEMZERO(bmpcoreheader, SIZEOF(bmpcoreheader));
-
- /* Fill the file header */
- bmpfileheader[0] = 0x42; /* first 2 bytes are ASCII 'B', 'M' */
- bmpfileheader[1] = 0x4D;
- PUT_4B(bmpfileheader, 2, bfSize); /* bfSize */
- /* we leave bfReserved1 & bfReserved2 = 0 */
- PUT_4B(bmpfileheader, 10, headersize); /* bfOffBits */
-
- /* Fill the info header (Microsoft calls this a BITMAPCOREHEADER) */
- PUT_2B(bmpcoreheader, 0, 12); /* bcSize */
- PUT_2B(bmpcoreheader, 4, cinfo->output_width); /* bcWidth */
- PUT_2B(bmpcoreheader, 6, cinfo->output_height); /* bcHeight */
- PUT_2B(bmpcoreheader, 8, 1); /* bcPlanes - must be 1 */
- PUT_2B(bmpcoreheader, 10, bits_per_pixel); /* bcBitCount */
-
- if (JFWRITE(dest->pub.output_file, bmpfileheader, 14) != (size_t) 14)
- ERREXIT(cinfo, JERR_FILE_WRITE);
- if (JFWRITE(dest->pub.output_file, bmpcoreheader, 12) != (size_t) 12)
- ERREXIT(cinfo, JERR_FILE_WRITE);
-
- if (cmap_entries > 0)
- write_colormap(cinfo, dest, cmap_entries, 3);
-}
-
-
-/*
- * Write the colormap.
- * Windows uses BGR0 map entries; OS/2 uses BGR entries.
- */
-
-LOCAL(void)
-write_colormap (j_decompress_ptr cinfo, bmp_dest_ptr dest,
- int map_colors, int map_entry_size)
-{
- JSAMPARRAY colormap = cinfo->colormap;
- int num_colors = cinfo->actual_number_of_colors;
- FILE * outfile = dest->pub.output_file;
- int i;
-
- if (colormap != NULL) {
- if (cinfo->out_color_components == 3) {
- /* Normal case with RGB colormap */
- for (i = 0; i < num_colors; i++) {
- putc(GETJSAMPLE(colormap[2][i]), outfile);
- putc(GETJSAMPLE(colormap[1][i]), outfile);
- putc(GETJSAMPLE(colormap[0][i]), outfile);
- if (map_entry_size == 4)
- putc(0, outfile);
- }
- } else {
- /* Grayscale colormap (only happens with grayscale quantization) */
- for (i = 0; i < num_colors; i++) {
- putc(GETJSAMPLE(colormap[0][i]), outfile);
- putc(GETJSAMPLE(colormap[0][i]), outfile);
- putc(GETJSAMPLE(colormap[0][i]), outfile);
- if (map_entry_size == 4)
- putc(0, outfile);
- }
- }
- } else {
- /* If no colormap, must be grayscale data. Generate a linear "map". */
- for (i = 0; i < 256; i++) {
- putc(i, outfile);
- putc(i, outfile);
- putc(i, outfile);
- if (map_entry_size == 4)
- putc(0, outfile);
- }
- }
- /* Pad colormap with zeros to ensure specified number of colormap entries */
- if (i > map_colors)
- ERREXIT1(cinfo, JERR_TOO_MANY_COLORS, i);
- for (; i < map_colors; i++) {
- putc(0, outfile);
- putc(0, outfile);
- putc(0, outfile);
- if (map_entry_size == 4)
- putc(0, outfile);
- }
-}
-
-
-METHODDEF(void)
-finish_output_bmp (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- bmp_dest_ptr dest = (bmp_dest_ptr) dinfo;
- register FILE * outfile = dest->pub.output_file;
- JSAMPARRAY image_ptr;
- register JSAMPROW data_ptr;
- JDIMENSION row;
- register JDIMENSION col;
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-
- /* Write the header and colormap */
- if (dest->is_os2)
- write_os2_header(cinfo, dest);
- else
- write_bmp_header(cinfo, dest);
-
- /* Write the file body from our virtual array */
- for (row = cinfo->output_height; row > 0; row--) {
- if (progress != NULL) {
- progress->pub.pass_counter = (long) (cinfo->output_height - row);
- progress->pub.pass_limit = (long) cinfo->output_height;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
- image_ptr = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->whole_image, row-1, (JDIMENSION) 1, FALSE);
- data_ptr = image_ptr[0];
- for (col = dest->row_width; col > 0; col--) {
- putc(GETJSAMPLE(*data_ptr), outfile);
- data_ptr++;
- }
- }
- if (progress != NULL)
- progress->completed_extra_passes++;
-
- /* Make sure we wrote the output file OK */
- fflush(outfile);
- if (ferror(outfile))
- ERREXIT(cinfo, JERR_FILE_WRITE);
-}
-
-
-/*
- * The module selection routine for BMP format output.
- */
-
-GLOBAL(djpeg_dest_ptr)
-jinit_write_bmp (j_decompress_ptr cinfo, boolean is_os2)
-{
- bmp_dest_ptr dest;
- JDIMENSION row_width;
-
- /* Create module interface object, fill in method pointers */
- dest = (bmp_dest_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(bmp_dest_struct));
- dest->pub.start_output = start_output_bmp;
- dest->pub.finish_output = finish_output_bmp;
- dest->is_os2 = is_os2;
-
- if (cinfo->out_color_space == JCS_GRAYSCALE) {
- dest->pub.put_pixel_rows = put_gray_rows;
- } else if (cinfo->out_color_space == JCS_RGB) {
- if (cinfo->quantize_colors)
- dest->pub.put_pixel_rows = put_gray_rows;
- else
- dest->pub.put_pixel_rows = put_pixel_rows;
- } else {
- ERREXIT(cinfo, JERR_BMP_COLORSPACE);
- }
-
- /* Calculate output image dimensions so we can allocate space */
- jpeg_calc_output_dimensions(cinfo);
-
- /* Determine width of rows in the BMP file (padded to 4-byte boundary). */
- row_width = cinfo->output_width * cinfo->output_components;
- dest->data_width = row_width;
- while ((row_width & 3) != 0) row_width++;
- dest->row_width = row_width;
- dest->pad_bytes = (int) (row_width - dest->data_width);
-
- /* Allocate space for inversion array, prepare for write pass */
- dest->whole_image = (*cinfo->mem->request_virt_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
- row_width, cinfo->output_height, (JDIMENSION) 1);
- dest->cur_output_row = 0;
- if (cinfo->progress != NULL) {
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
- progress->total_extra_passes++; /* count file input as separate pass */
- }
-
- /* Create decompressor output buffer. */
- dest->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, row_width, (JDIMENSION) 1);
- dest->pub.buffer_height = 1;
-
- return (djpeg_dest_ptr) dest;
-}
-
-#endif /* BMP_SUPPORTED */
+++ /dev/null
-/*
- * wrgif.c
- *
- * Copyright (C) 1991-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to write output images in GIF format.
- *
- **************************************************************************
- * NOTE: to avoid entanglements with Unisys' patent on LZW compression, *
- * this code has been modified to output "uncompressed GIF" files. *
- * There is no trace of the LZW algorithm in this file. *
- **************************************************************************
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume output to
- * an ordinary stdio stream.
- */
-
-/*
- * This code is loosely based on ppmtogif from the PBMPLUS distribution
- * of Feb. 1991. That file contains the following copyright notice:
- * Based on GIFENCODE by David Rowley <mgardi@watdscu.waterloo.edu>.
- * Lempel-Ziv compression based on "compress" by Spencer W. Thomas et al.
- * Copyright (C) 1989 by Jef Poskanzer.
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation. This software is provided "as is" without express or
- * implied warranty.
- *
- * We are also required to state that
- * "The Graphics Interchange Format(c) is the Copyright property of
- * CompuServe Incorporated. GIF(sm) is a Service Mark property of
- * CompuServe Incorporated."
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef GIF_SUPPORTED
-
-
-/* Private version of data destination object */
-
-typedef struct {
- struct djpeg_dest_struct pub; /* public fields */
-
- j_decompress_ptr cinfo; /* back link saves passing separate parm */
-
- /* State for packing variable-width codes into a bitstream */
- int n_bits; /* current number of bits/code */
- int maxcode; /* maximum code, given n_bits */
- INT32 cur_accum; /* holds bits not yet output */
- int cur_bits; /* # of bits in cur_accum */
-
- /* State for GIF code assignment */
- int ClearCode; /* clear code (doesn't change) */
- int EOFCode; /* EOF code (ditto) */
- int code_counter; /* counts output symbols */
-
- /* GIF data packet construction buffer */
- int bytesinpkt; /* # of bytes in current packet */
- char packetbuf[256]; /* workspace for accumulating packet */
-
-} gif_dest_struct;
-
-typedef gif_dest_struct * gif_dest_ptr;
-
-/* Largest value that will fit in N bits */
-#define MAXCODE(n_bits) ((1 << (n_bits)) - 1)
-
-
-/*
- * Routines to package finished data bytes into GIF data blocks.
- * A data block consists of a count byte (1..255) and that many data bytes.
- */
-
-LOCAL(void)
-flush_packet (gif_dest_ptr dinfo)
-/* flush any accumulated data */
-{
- if (dinfo->bytesinpkt > 0) { /* never write zero-length packet */
- dinfo->packetbuf[0] = (char) dinfo->bytesinpkt++;
- if (JFWRITE(dinfo->pub.output_file, dinfo->packetbuf, dinfo->bytesinpkt)
- != (size_t) dinfo->bytesinpkt)
- ERREXIT(dinfo->cinfo, JERR_FILE_WRITE);
- dinfo->bytesinpkt = 0;
- }
-}
-
-
-/* Add a character to current packet; flush to disk if necessary */
-#define CHAR_OUT(dinfo,c) \
- { (dinfo)->packetbuf[++(dinfo)->bytesinpkt] = (char) (c); \
- if ((dinfo)->bytesinpkt >= 255) \
- flush_packet(dinfo); \
- }
-
-
-/* Routine to convert variable-width codes into a byte stream */
-
-LOCAL(void)
-output (gif_dest_ptr dinfo, int code)
-/* Emit a code of n_bits bits */
-/* Uses cur_accum and cur_bits to reblock into 8-bit bytes */
-{
- dinfo->cur_accum |= ((INT32) code) << dinfo->cur_bits;
- dinfo->cur_bits += dinfo->n_bits;
-
- while (dinfo->cur_bits >= 8) {
- CHAR_OUT(dinfo, dinfo->cur_accum & 0xFF);
- dinfo->cur_accum >>= 8;
- dinfo->cur_bits -= 8;
- }
-}
-
-
-/* The pseudo-compression algorithm.
- *
- * In this module we simply output each pixel value as a separate symbol;
- * thus, no compression occurs. In fact, there is expansion of one bit per
- * pixel, because we use a symbol width one bit wider than the pixel width.
- *
- * GIF ordinarily uses variable-width symbols, and the decoder will expect
- * to ratchet up the symbol width after a fixed number of symbols.
- * To simplify the logic and keep the expansion penalty down, we emit a
- * GIF Clear code to reset the decoder just before the width would ratchet up.
- * Thus, all the symbols in the output file will have the same bit width.
- * Note that emitting the Clear codes at the right times is a mere matter of
- * counting output symbols and is in no way dependent on the LZW patent.
- *
- * With a small basic pixel width (low color count), Clear codes will be
- * needed very frequently, causing the file to expand even more. So this
- * simplistic approach wouldn't work too well on bilevel images, for example.
- * But for output of JPEG conversions the pixel width will usually be 8 bits
- * (129 to 256 colors), so the overhead added by Clear symbols is only about
- * one symbol in every 256.
- */
-
-LOCAL(void)
-compress_init (gif_dest_ptr dinfo, int i_bits)
-/* Initialize pseudo-compressor */
-{
- /* init all the state variables */
- dinfo->n_bits = i_bits;
- dinfo->maxcode = MAXCODE(dinfo->n_bits);
- dinfo->ClearCode = (1 << (i_bits - 1));
- dinfo->EOFCode = dinfo->ClearCode + 1;
- dinfo->code_counter = dinfo->ClearCode + 2;
- /* init output buffering vars */
- dinfo->bytesinpkt = 0;
- dinfo->cur_accum = 0;
- dinfo->cur_bits = 0;
- /* GIF specifies an initial Clear code */
- output(dinfo, dinfo->ClearCode);
-}
-
-
-LOCAL(void)
-compress_pixel (gif_dest_ptr dinfo, int c)
-/* Accept and "compress" one pixel value.
- * The given value must be less than n_bits wide.
- */
-{
- /* Output the given pixel value as a symbol. */
- output(dinfo, c);
- /* Issue Clear codes often enough to keep the reader from ratcheting up
- * its symbol size.
- */
- if (dinfo->code_counter < dinfo->maxcode) {
- dinfo->code_counter++;
- } else {
- output(dinfo, dinfo->ClearCode);
- dinfo->code_counter = dinfo->ClearCode + 2; /* reset the counter */
- }
-}
-
-
-LOCAL(void)
-compress_term (gif_dest_ptr dinfo)
-/* Clean up at end */
-{
- /* Send an EOF code */
- output(dinfo, dinfo->EOFCode);
- /* Flush the bit-packing buffer */
- if (dinfo->cur_bits > 0) {
- CHAR_OUT(dinfo, dinfo->cur_accum & 0xFF);
- }
- /* Flush the packet buffer */
- flush_packet(dinfo);
-}
-
-
-/* GIF header construction */
-
-
-LOCAL(void)
-put_word (gif_dest_ptr dinfo, unsigned int w)
-/* Emit a 16-bit word, LSB first */
-{
- putc(w & 0xFF, dinfo->pub.output_file);
- putc((w >> 8) & 0xFF, dinfo->pub.output_file);
-}
-
-
-LOCAL(void)
-put_3bytes (gif_dest_ptr dinfo, int val)
-/* Emit 3 copies of same byte value --- handy subr for colormap construction */
-{
- putc(val, dinfo->pub.output_file);
- putc(val, dinfo->pub.output_file);
- putc(val, dinfo->pub.output_file);
-}
-
-
-LOCAL(void)
-emit_header (gif_dest_ptr dinfo, int num_colors, JSAMPARRAY colormap)
-/* Output the GIF file header, including color map */
-/* If colormap==NULL, synthesize a gray-scale colormap */
-{
- int BitsPerPixel, ColorMapSize, InitCodeSize, FlagByte;
- int cshift = dinfo->cinfo->data_precision - 8;
- int i;
-
- if (num_colors > 256)
- ERREXIT1(dinfo->cinfo, JERR_TOO_MANY_COLORS, num_colors);
- /* Compute bits/pixel and related values */
- BitsPerPixel = 1;
- while (num_colors > (1 << BitsPerPixel))
- BitsPerPixel++;
- ColorMapSize = 1 << BitsPerPixel;
- if (BitsPerPixel <= 1)
- InitCodeSize = 2;
- else
- InitCodeSize = BitsPerPixel;
- /*
- * Write the GIF header.
- * Note that we generate a plain GIF87 header for maximum compatibility.
- */
- putc('G', dinfo->pub.output_file);
- putc('I', dinfo->pub.output_file);
- putc('F', dinfo->pub.output_file);
- putc('8', dinfo->pub.output_file);
- putc('7', dinfo->pub.output_file);
- putc('a', dinfo->pub.output_file);
- /* Write the Logical Screen Descriptor */
- put_word(dinfo, (unsigned int) dinfo->cinfo->output_width);
- put_word(dinfo, (unsigned int) dinfo->cinfo->output_height);
- FlagByte = 0x80; /* Yes, there is a global color table */
- FlagByte |= (BitsPerPixel-1) << 4; /* color resolution */
- FlagByte |= (BitsPerPixel-1); /* size of global color table */
- putc(FlagByte, dinfo->pub.output_file);
- putc(0, dinfo->pub.output_file); /* Background color index */
- putc(0, dinfo->pub.output_file); /* Reserved (aspect ratio in GIF89) */
- /* Write the Global Color Map */
- /* If the color map is more than 8 bits precision, */
- /* we reduce it to 8 bits by shifting */
- for (i=0; i < ColorMapSize; i++) {
- if (i < num_colors) {
- if (colormap != NULL) {
- if (dinfo->cinfo->out_color_space == JCS_RGB) {
- /* Normal case: RGB color map */
- putc(GETJSAMPLE(colormap[0][i]) >> cshift, dinfo->pub.output_file);
- putc(GETJSAMPLE(colormap[1][i]) >> cshift, dinfo->pub.output_file);
- putc(GETJSAMPLE(colormap[2][i]) >> cshift, dinfo->pub.output_file);
- } else {
- /* Grayscale "color map": possible if quantizing grayscale image */
- put_3bytes(dinfo, GETJSAMPLE(colormap[0][i]) >> cshift);
- }
- } else {
- /* Create a gray-scale map of num_colors values, range 0..255 */
- put_3bytes(dinfo, (i * 255 + (num_colors-1)/2) / (num_colors-1));
- }
- } else {
- /* fill out the map to a power of 2 */
- put_3bytes(dinfo, 0);
- }
- }
- /* Write image separator and Image Descriptor */
- putc(',', dinfo->pub.output_file); /* separator */
- put_word(dinfo, 0); /* left/top offset */
- put_word(dinfo, 0);
- put_word(dinfo, (unsigned int) dinfo->cinfo->output_width); /* image size */
- put_word(dinfo, (unsigned int) dinfo->cinfo->output_height);
- /* flag byte: not interlaced, no local color map */
- putc(0x00, dinfo->pub.output_file);
- /* Write Initial Code Size byte */
- putc(InitCodeSize, dinfo->pub.output_file);
-
- /* Initialize for "compression" of image data */
- compress_init(dinfo, InitCodeSize+1);
-}
-
-
-/*
- * Startup: write the file header.
- */
-
-METHODDEF(void)
-start_output_gif (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- gif_dest_ptr dest = (gif_dest_ptr) dinfo;
-
- if (cinfo->quantize_colors)
- emit_header(dest, cinfo->actual_number_of_colors, cinfo->colormap);
- else
- emit_header(dest, 256, (JSAMPARRAY) NULL);
-}
-
-
-/*
- * Write some pixel data.
- * In this module rows_supplied will always be 1.
- */
-
-METHODDEF(void)
-put_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- gif_dest_ptr dest = (gif_dest_ptr) dinfo;
- register JSAMPROW ptr;
- register JDIMENSION col;
-
- ptr = dest->pub.buffer[0];
- for (col = cinfo->output_width; col > 0; col--) {
- compress_pixel(dest, GETJSAMPLE(*ptr++));
- }
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_output_gif (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- gif_dest_ptr dest = (gif_dest_ptr) dinfo;
-
- /* Flush "compression" mechanism */
- compress_term(dest);
- /* Write a zero-length data block to end the series */
- putc(0, dest->pub.output_file);
- /* Write the GIF terminator mark */
- putc(';', dest->pub.output_file);
- /* Make sure we wrote the output file OK */
- fflush(dest->pub.output_file);
- if (ferror(dest->pub.output_file))
- ERREXIT(cinfo, JERR_FILE_WRITE);
-}
-
-
-/*
- * The module selection routine for GIF format output.
- */
-
-GLOBAL(djpeg_dest_ptr)
-jinit_write_gif (j_decompress_ptr cinfo)
-{
- gif_dest_ptr dest;
-
- /* Create module interface object, fill in method pointers */
- dest = (gif_dest_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(gif_dest_struct));
- dest->cinfo = cinfo; /* make back link for subroutines */
- dest->pub.start_output = start_output_gif;
- dest->pub.put_pixel_rows = put_pixel_rows;
- dest->pub.finish_output = finish_output_gif;
-
- if (cinfo->out_color_space != JCS_GRAYSCALE &&
- cinfo->out_color_space != JCS_RGB)
- ERREXIT(cinfo, JERR_GIF_COLORSPACE);
-
- /* Force quantization if color or if > 8 bits input */
- if (cinfo->out_color_space != JCS_GRAYSCALE || cinfo->data_precision > 8) {
- /* Force quantization to at most 256 colors */
- cinfo->quantize_colors = TRUE;
- if (cinfo->desired_number_of_colors > 256)
- cinfo->desired_number_of_colors = 256;
- }
-
- /* Calculate output image dimensions so we can allocate space */
- jpeg_calc_output_dimensions(cinfo);
-
- if (cinfo->output_components != 1) /* safety check: just one component? */
- ERREXIT(cinfo, JERR_GIF_BUG);
-
- /* Create decompressor output buffer. */
- dest->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, cinfo->output_width, (JDIMENSION) 1);
- dest->pub.buffer_height = 1;
-
- return (djpeg_dest_ptr) dest;
-}
-
-#endif /* GIF_SUPPORTED */
+++ /dev/null
-.TH WRJPGCOM 1 "15 June 1995"
-.SH NAME
-wrjpgcom \- insert text comments into a JPEG file
-.SH SYNOPSIS
-.B wrjpgcom
-[
-.B \-replace
-]
-[
-.BI \-comment " text"
-]
-[
-.BI \-cfile " name"
-]
-[
-.I filename
-]
-.LP
-.SH DESCRIPTION
-.LP
-.B wrjpgcom
-reads the named JPEG/JFIF file, or the standard input if no file is named,
-and generates a new JPEG/JFIF file on standard output. A comment block is
-added to the file.
-.PP
-The JPEG standard allows "comment" (COM) blocks to occur within a JPEG file.
-Although the standard doesn't actually define what COM blocks are for, they
-are widely used to hold user-supplied text strings. This lets you add
-annotations, titles, index terms, etc to your JPEG files, and later retrieve
-them as text. COM blocks do not interfere with the image stored in the JPEG
-file. The maximum size of a COM block is 64K, but you can have as many of
-them as you like in one JPEG file.
-.PP
-.B wrjpgcom
-adds a COM block, containing text you provide, to a JPEG file.
-Ordinarily, the COM block is added after any existing COM blocks; but you
-can delete the old COM blocks if you wish.
-.SH OPTIONS
-Switch names may be abbreviated, and are not case sensitive.
-.TP
-.B \-replace
-Delete any existing COM blocks from the file.
-.TP
-.BI \-comment " text"
-Supply text for new COM block on command line.
-.TP
-.BI \-cfile " name"
-Read text for new COM block from named file.
-.PP
-If you have only one line of comment text to add, you can provide it on the
-command line with
-.BR \-comment .
-The comment text must be surrounded with quotes so that it is treated as a
-single argument. Longer comments can be read from a text file.
-.PP
-If you give neither
-.B \-comment
-nor
-.BR \-cfile ,
-then
-.B wrjpgcom
-will read the comment text from standard input. (In this case an input image
-file name MUST be supplied, so that the source JPEG file comes from somewhere
-else.) You can enter multiple lines, up to 64KB worth. Type an end-of-file
-indicator (usually control-D) to terminate the comment text entry.
-.PP
-.B wrjpgcom
-will not add a COM block if the provided comment string is empty. Therefore
-\fB\-replace \-comment ""\fR can be used to delete all COM blocks from a file.
-.SH EXAMPLES
-.LP
-Add a short comment to in.jpg, producing out.jpg:
-.IP
-.B wrjpgcom \-c
-\fI"View of my back yard" in.jpg
-.B >
-.I out.jpg
-.PP
-Attach a long comment previously stored in comment.txt:
-.IP
-.B wrjpgcom
-.I in.jpg
-.B <
-.I comment.txt
-.B >
-.I out.jpg
-.PP
-or equivalently
-.IP
-.B wrjpgcom
-.B -cfile
-.I comment.txt
-.B <
-.I in.jpg
-.B >
-.I out.jpg
-.SH SEE ALSO
-.BR cjpeg (1),
-.BR djpeg (1),
-.BR jpegtran (1),
-.BR rdjpgcom (1)
-.SH AUTHOR
-Independent JPEG Group
+++ /dev/null
-/*
- * wrjpgcom.c
- *
- * Copyright (C) 1994-1997, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains a very simple stand-alone application that inserts
- * user-supplied text as a COM (comment) marker in a JFIF file.
- * This may be useful as an example of the minimum logic needed to parse
- * JPEG markers.
- */
-
-#define JPEG_CJPEG_DJPEG /* to get the command-line config symbols */
-#include "jinclude.h" /* get auto-config symbols, <stdio.h> */
-
-#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc() */
-extern void * malloc ();
-#endif
-#include <ctype.h> /* to declare isupper(), tolower() */
-#ifdef USE_SETMODE
-#include <fcntl.h> /* to declare setmode()'s parameter macros */
-/* If you have setmode() but not <io.h>, just delete this line: */
-#include <io.h> /* to declare setmode() */
-#endif
-
-#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
-#ifdef __MWERKS__
-#include <SIOUX.h> /* Metrowerks needs this */
-#include <console.h> /* ... and this */
-#endif
-#ifdef THINK_C
-#include <console.h> /* Think declares it here */
-#endif
-#endif
-
-#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
-#define READ_BINARY "r"
-#define WRITE_BINARY "w"
-#else
-#ifdef VMS /* VMS is very nonstandard */
-#define READ_BINARY "rb", "ctx=stm"
-#define WRITE_BINARY "wb", "ctx=stm"
-#else /* standard ANSI-compliant case */
-#define READ_BINARY "rb"
-#define WRITE_BINARY "wb"
-#endif
-#endif
-
-#ifndef EXIT_FAILURE /* define exit() codes if not provided */
-#define EXIT_FAILURE 1
-#endif
-#ifndef EXIT_SUCCESS
-#ifdef VMS
-#define EXIT_SUCCESS 1 /* VMS is very nonstandard */
-#else
-#define EXIT_SUCCESS 0
-#endif
-#endif
-
-/* Reduce this value if your malloc() can't allocate blocks up to 64K.
- * On DOS, compiling in large model is usually a better solution.
- */
-
-#ifndef MAX_COM_LENGTH
-#define MAX_COM_LENGTH 65000L /* must be <= 65533 in any case */
-#endif
-
-
-/*
- * These macros are used to read the input file and write the output file.
- * To reuse this code in another application, you might need to change these.
- */
-
-static FILE * infile; /* input JPEG file */
-
-/* Return next input byte, or EOF if no more */
-#define NEXTBYTE() getc(infile)
-
-static FILE * outfile; /* output JPEG file */
-
-/* Emit an output byte */
-#define PUTBYTE(x) putc((x), outfile)
-
-
-/* Error exit handler */
-#define ERREXIT(msg) (fprintf(stderr, "%s\n", msg), exit(EXIT_FAILURE))
-
-
-/* Read one byte, testing for EOF */
-static int
-read_1_byte (void)
-{
- int c;
-
- c = NEXTBYTE();
- if (c == EOF)
- ERREXIT("Premature EOF in JPEG file");
- return c;
-}
-
-/* Read 2 bytes, convert to unsigned int */
-/* All 2-byte quantities in JPEG markers are MSB first */
-static unsigned int
-read_2_bytes (void)
-{
- int c1, c2;
-
- c1 = NEXTBYTE();
- if (c1 == EOF)
- ERREXIT("Premature EOF in JPEG file");
- c2 = NEXTBYTE();
- if (c2 == EOF)
- ERREXIT("Premature EOF in JPEG file");
- return (((unsigned int) c1) << 8) + ((unsigned int) c2);
-}
-
-
-/* Routines to write data to output file */
-
-static void
-write_1_byte (int c)
-{
- PUTBYTE(c);
-}
-
-static void
-write_2_bytes (unsigned int val)
-{
- PUTBYTE((val >> 8) & 0xFF);
- PUTBYTE(val & 0xFF);
-}
-
-static void
-write_marker (int marker)
-{
- PUTBYTE(0xFF);
- PUTBYTE(marker);
-}
-
-static void
-copy_rest_of_file (void)
-{
- int c;
-
- while ((c = NEXTBYTE()) != EOF)
- PUTBYTE(c);
-}
-
-
-/*
- * JPEG markers consist of one or more 0xFF bytes, followed by a marker
- * code byte (which is not an FF). Here are the marker codes of interest
- * in this program. (See jdmarker.c for a more complete list.)
- */
-
-#define M_SOF0 0xC0 /* Start Of Frame N */
-#define M_SOF1 0xC1 /* N indicates which compression process */
-#define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */
-#define M_SOF3 0xC3
-#define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */
-#define M_SOF6 0xC6
-#define M_SOF7 0xC7
-#define M_SOF9 0xC9
-#define M_SOF10 0xCA
-#define M_SOF11 0xCB
-#define M_SOF13 0xCD
-#define M_SOF14 0xCE
-#define M_SOF15 0xCF
-#define M_SOI 0xD8 /* Start Of Image (beginning of datastream) */
-#define M_EOI 0xD9 /* End Of Image (end of datastream) */
-#define M_SOS 0xDA /* Start Of Scan (begins compressed data) */
-#define M_COM 0xFE /* COMment */
-
-
-/*
- * Find the next JPEG marker and return its marker code.
- * We expect at least one FF byte, possibly more if the compressor used FFs
- * to pad the file. (Padding FFs will NOT be replicated in the output file.)
- * There could also be non-FF garbage between markers. The treatment of such
- * garbage is unspecified; we choose to skip over it but emit a warning msg.
- * NB: this routine must not be used after seeing SOS marker, since it will
- * not deal correctly with FF/00 sequences in the compressed image data...
- */
-
-static int
-next_marker (void)
-{
- int c;
- int discarded_bytes = 0;
-
- /* Find 0xFF byte; count and skip any non-FFs. */
- c = read_1_byte();
- while (c != 0xFF) {
- discarded_bytes++;
- c = read_1_byte();
- }
- /* Get marker code byte, swallowing any duplicate FF bytes. Extra FFs
- * are legal as pad bytes, so don't count them in discarded_bytes.
- */
- do {
- c = read_1_byte();
- } while (c == 0xFF);
-
- if (discarded_bytes != 0) {
- fprintf(stderr, "Warning: garbage data found in JPEG file\n");
- }
-
- return c;
-}
-
-
-/*
- * Read the initial marker, which should be SOI.
- * For a JFIF file, the first two bytes of the file should be literally
- * 0xFF M_SOI. To be more general, we could use next_marker, but if the
- * input file weren't actually JPEG at all, next_marker might read the whole
- * file and then return a misleading error message...
- */
-
-static int
-first_marker (void)
-{
- int c1, c2;
-
- c1 = NEXTBYTE();
- c2 = NEXTBYTE();
- if (c1 != 0xFF || c2 != M_SOI)
- ERREXIT("Not a JPEG file");
- return c2;
-}
-
-
-/*
- * Most types of marker are followed by a variable-length parameter segment.
- * This routine skips over the parameters for any marker we don't otherwise
- * want to process.
- * Note that we MUST skip the parameter segment explicitly in order not to
- * be fooled by 0xFF bytes that might appear within the parameter segment;
- * such bytes do NOT introduce new markers.
- */
-
-static void
-copy_variable (void)
-/* Copy an unknown or uninteresting variable-length marker */
-{
- unsigned int length;
-
- /* Get the marker parameter length count */
- length = read_2_bytes();
- write_2_bytes(length);
- /* Length includes itself, so must be at least 2 */
- if (length < 2)
- ERREXIT("Erroneous JPEG marker length");
- length -= 2;
- /* Skip over the remaining bytes */
- while (length > 0) {
- write_1_byte(read_1_byte());
- length--;
- }
-}
-
-static void
-skip_variable (void)
-/* Skip over an unknown or uninteresting variable-length marker */
-{
- unsigned int length;
-
- /* Get the marker parameter length count */
- length = read_2_bytes();
- /* Length includes itself, so must be at least 2 */
- if (length < 2)
- ERREXIT("Erroneous JPEG marker length");
- length -= 2;
- /* Skip over the remaining bytes */
- while (length > 0) {
- (void) read_1_byte();
- length--;
- }
-}
-
-
-/*
- * Parse the marker stream until SOFn or EOI is seen;
- * copy data to output, but discard COM markers unless keep_COM is true.
- */
-
-static int
-scan_JPEG_header (int keep_COM)
-{
- int marker;
-
- /* Expect SOI at start of file */
- if (first_marker() != M_SOI)
- ERREXIT("Expected SOI marker first");
- write_marker(M_SOI);
-
- /* Scan miscellaneous markers until we reach SOFn. */
- for (;;) {
- marker = next_marker();
- switch (marker) {
- /* Note that marker codes 0xC4, 0xC8, 0xCC are not, and must not be,
- * treated as SOFn. C4 in particular is actually DHT.
- */
- case M_SOF0: /* Baseline */
- case M_SOF1: /* Extended sequential, Huffman */
- case M_SOF2: /* Progressive, Huffman */
- case M_SOF3: /* Lossless, Huffman */
- case M_SOF5: /* Differential sequential, Huffman */
- case M_SOF6: /* Differential progressive, Huffman */
- case M_SOF7: /* Differential lossless, Huffman */
- case M_SOF9: /* Extended sequential, arithmetic */
- case M_SOF10: /* Progressive, arithmetic */
- case M_SOF11: /* Lossless, arithmetic */
- case M_SOF13: /* Differential sequential, arithmetic */
- case M_SOF14: /* Differential progressive, arithmetic */
- case M_SOF15: /* Differential lossless, arithmetic */
- return marker;
-
- case M_SOS: /* should not see compressed data before SOF */
- ERREXIT("SOS without prior SOFn");
- break;
-
- case M_EOI: /* in case it's a tables-only JPEG stream */
- return marker;
-
- case M_COM: /* Existing COM: conditionally discard */
- if (keep_COM) {
- write_marker(marker);
- copy_variable();
- } else {
- skip_variable();
- }
- break;
-
- default: /* Anything else just gets copied */
- write_marker(marker);
- copy_variable(); /* we assume it has a parameter count... */
- break;
- }
- } /* end loop */
-}
-
-
-/* Command line parsing code */
-
-static const char * progname; /* program name for error messages */
-
-
-static void
-usage (void)
-/* complain about bad command line */
-{
- fprintf(stderr, "wrjpgcom inserts a textual comment in a JPEG file.\n");
- fprintf(stderr, "You can add to or replace any existing comment(s).\n");
-
- fprintf(stderr, "Usage: %s [switches] ", progname);
-#ifdef TWO_FILE_COMMANDLINE
- fprintf(stderr, "inputfile outputfile\n");
-#else
- fprintf(stderr, "[inputfile]\n");
-#endif
-
- fprintf(stderr, "Switches (names may be abbreviated):\n");
- fprintf(stderr, " -replace Delete any existing comments\n");
- fprintf(stderr, " -comment \"text\" Insert comment with given text\n");
- fprintf(stderr, " -cfile name Read comment from named file\n");
- fprintf(stderr, "Notice that you must put quotes around the comment text\n");
- fprintf(stderr, "when you use -comment.\n");
- fprintf(stderr, "If you do not give either -comment or -cfile on the command line,\n");
- fprintf(stderr, "then the comment text is read from standard input.\n");
- fprintf(stderr, "It can be multiple lines, up to %u characters total.\n",
- (unsigned int) MAX_COM_LENGTH);
-#ifndef TWO_FILE_COMMANDLINE
- fprintf(stderr, "You must specify an input JPEG file name when supplying\n");
- fprintf(stderr, "comment text from standard input.\n");
-#endif
-
- exit(EXIT_FAILURE);
-}
-
-
-static int
-keymatch (char * arg, const char * keyword, int minchars)
-/* Case-insensitive matching of (possibly abbreviated) keyword switches. */
-/* keyword is the constant keyword (must be lower case already), */
-/* minchars is length of minimum legal abbreviation. */
-{
- register int ca, ck;
- register int nmatched = 0;
-
- while ((ca = *arg++) != '\0') {
- if ((ck = *keyword++) == '\0')
- return 0; /* arg longer than keyword, no good */
- if (isupper(ca)) /* force arg to lcase (assume ck is already) */
- ca = tolower(ca);
- if (ca != ck)
- return 0; /* no good */
- nmatched++; /* count matched characters */
- }
- /* reached end of argument; fail if it's too short for unique abbrev */
- if (nmatched < minchars)
- return 0;
- return 1; /* A-OK */
-}
-
-
-/*
- * The main program.
- */
-
-int
-main (int argc, char **argv)
-{
- int argn;
- char * arg;
- int keep_COM = 1;
- char * comment_arg = NULL;
- FILE * comment_file = NULL;
- unsigned int comment_length = 0;
- int marker;
-
- /* On Mac, fetch a command line. */
-#ifdef USE_CCOMMAND
- argc = ccommand(&argv);
-#endif
-
- progname = argv[0];
- if (progname == NULL || progname[0] == 0)
- progname = "wrjpgcom"; /* in case C library doesn't provide it */
-
- /* Parse switches, if any */
- for (argn = 1; argn < argc; argn++) {
- arg = argv[argn];
- if (arg[0] != '-')
- break; /* not switch, must be file name */
- arg++; /* advance over '-' */
- if (keymatch(arg, "replace", 1)) {
- keep_COM = 0;
- } else if (keymatch(arg, "cfile", 2)) {
- if (++argn >= argc) usage();
- if ((comment_file = fopen(argv[argn], "r")) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
- exit(EXIT_FAILURE);
- }
- } else if (keymatch(arg, "comment", 1)) {
- if (++argn >= argc) usage();
- comment_arg = argv[argn];
- /* If the comment text starts with '"', then we are probably running
- * under MS-DOG and must parse out the quoted string ourselves. Sigh.
- */
- if (comment_arg[0] == '"') {
- comment_arg = (char *) malloc((size_t) MAX_COM_LENGTH);
- if (comment_arg == NULL)
- ERREXIT("Insufficient memory");
- strcpy(comment_arg, argv[argn]+1);
- for (;;) {
- comment_length = (unsigned int) strlen(comment_arg);
- if (comment_length > 0 && comment_arg[comment_length-1] == '"') {
- comment_arg[comment_length-1] = '\0'; /* zap terminating quote */
- break;
- }
- if (++argn >= argc)
- ERREXIT("Missing ending quote mark");
- strcat(comment_arg, " ");
- strcat(comment_arg, argv[argn]);
- }
- }
- comment_length = (unsigned int) strlen(comment_arg);
- } else
- usage();
- }
-
- /* Cannot use both -comment and -cfile. */
- if (comment_arg != NULL && comment_file != NULL)
- usage();
- /* If there is neither -comment nor -cfile, we will read the comment text
- * from stdin; in this case there MUST be an input JPEG file name.
- */
- if (comment_arg == NULL && comment_file == NULL && argn >= argc)
- usage();
-
- /* Open the input file. */
- if (argn < argc) {
- if ((infile = fopen(argv[argn], READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
- exit(EXIT_FAILURE);
- }
- } else {
- /* default input file is stdin */
-#ifdef USE_SETMODE /* need to hack file mode? */
- setmode(fileno(stdin), O_BINARY);
-#endif
-#ifdef USE_FDOPEN /* need to re-open in binary mode? */
- if ((infile = fdopen(fileno(stdin), READ_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open stdin\n", progname);
- exit(EXIT_FAILURE);
- }
-#else
- infile = stdin;
-#endif
- }
-
- /* Open the output file. */
-#ifdef TWO_FILE_COMMANDLINE
- /* Must have explicit output file name */
- if (argn != argc-2) {
- fprintf(stderr, "%s: must name one input and one output file\n",
- progname);
- usage();
- }
- if ((outfile = fopen(argv[argn+1], WRITE_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open %s\n", progname, argv[argn+1]);
- exit(EXIT_FAILURE);
- }
-#else
- /* Unix style: expect zero or one file name */
- if (argn < argc-1) {
- fprintf(stderr, "%s: only one input file\n", progname);
- usage();
- }
- /* default output file is stdout */
-#ifdef USE_SETMODE /* need to hack file mode? */
- setmode(fileno(stdout), O_BINARY);
-#endif
-#ifdef USE_FDOPEN /* need to re-open in binary mode? */
- if ((outfile = fdopen(fileno(stdout), WRITE_BINARY)) == NULL) {
- fprintf(stderr, "%s: can't open stdout\n", progname);
- exit(EXIT_FAILURE);
- }
-#else
- outfile = stdout;
-#endif
-#endif /* TWO_FILE_COMMANDLINE */
-
- /* Collect comment text from comment_file or stdin, if necessary */
- if (comment_arg == NULL) {
- FILE * src_file;
- int c;
-
- comment_arg = (char *) malloc((size_t) MAX_COM_LENGTH);
- if (comment_arg == NULL)
- ERREXIT("Insufficient memory");
- comment_length = 0;
- src_file = (comment_file != NULL ? comment_file : stdin);
- while ((c = getc(src_file)) != EOF) {
- if (comment_length >= (unsigned int) MAX_COM_LENGTH) {
- fprintf(stderr, "Comment text may not exceed %u bytes\n",
- (unsigned int) MAX_COM_LENGTH);
- exit(EXIT_FAILURE);
- }
- comment_arg[comment_length++] = (char) c;
- }
- if (comment_file != NULL)
- fclose(comment_file);
- }
-
- /* Copy JPEG headers until SOFn marker;
- * we will insert the new comment marker just before SOFn.
- * This (a) causes the new comment to appear after, rather than before,
- * existing comments; and (b) ensures that comments come after any JFIF
- * or JFXX markers, as required by the JFIF specification.
- */
- marker = scan_JPEG_header(keep_COM);
- /* Insert the new COM marker, but only if nonempty text has been supplied */
- if (comment_length > 0) {
- write_marker(M_COM);
- write_2_bytes(comment_length + 2);
- while (comment_length > 0) {
- write_1_byte(*comment_arg++);
- comment_length--;
- }
- }
- /* Duplicate the remainder of the source file.
- * Note that any COM markers occuring after SOF will not be touched.
- */
- write_marker(marker);
- copy_rest_of_file();
-
- /* All done. */
- exit(EXIT_SUCCESS);
- return 0; /* suppress no-return-value warnings */
-}
+++ /dev/null
-/*
- * wrppm.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to write output images in PPM/PGM format.
- * The extended 2-byte-per-sample raw PPM/PGM formats are supported.
- * The PBMPLUS library is NOT required to compile this software
- * (but it is highly useful as a set of PPM image manipulation programs).
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume output to
- * an ordinary stdio stream.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef PPM_SUPPORTED
-
-
-/*
- * For 12-bit JPEG data, we either downscale the values to 8 bits
- * (to write standard byte-per-sample PPM/PGM files), or output
- * nonstandard word-per-sample PPM/PGM files. Downscaling is done
- * if PPM_NORAWWORD is defined (this can be done in the Makefile
- * or in jconfig.h).
- * (When the core library supports data precision reduction, a cleaner
- * implementation will be to ask for that instead.)
- */
-
-#if BITS_IN_JSAMPLE == 8
-#define PUTPPMSAMPLE(ptr,v) *ptr++ = (char) (v)
-#define BYTESPERSAMPLE 1
-#define PPM_MAXVAL 255
-#else
-#ifdef PPM_NORAWWORD
-#define PUTPPMSAMPLE(ptr,v) *ptr++ = (char) ((v) >> (BITS_IN_JSAMPLE-8))
-#define BYTESPERSAMPLE 1
-#define PPM_MAXVAL 255
-#else
-/* The word-per-sample format always puts the LSB first. */
-#define PUTPPMSAMPLE(ptr,v) \
- { register int val_ = v; \
- *ptr++ = (char) (val_ & 0xFF); \
- *ptr++ = (char) ((val_ >> 8) & 0xFF); \
- }
-#define BYTESPERSAMPLE 2
-#define PPM_MAXVAL ((1<<BITS_IN_JSAMPLE)-1)
-#endif
-#endif
-
-
-/*
- * When JSAMPLE is the same size as char, we can just fwrite() the
- * decompressed data to the PPM or PGM file. On PCs, in order to make this
- * work the output buffer must be allocated in near data space, because we are
- * assuming small-data memory model wherein fwrite() can't reach far memory.
- * If you need to process very wide images on a PC, you might have to compile
- * in large-memory model, or else replace fwrite() with a putc() loop ---
- * which will be much slower.
- */
-
-
-/* Private version of data destination object */
-
-typedef struct {
- struct djpeg_dest_struct pub; /* public fields */
-
- /* Usually these two pointers point to the same place: */
- char *iobuffer; /* fwrite's I/O buffer */
- JSAMPROW pixrow; /* decompressor output buffer */
- size_t buffer_width; /* width of I/O buffer */
- JDIMENSION samples_per_row; /* JSAMPLEs per output row */
-} ppm_dest_struct;
-
-typedef ppm_dest_struct * ppm_dest_ptr;
-
-
-/*
- * Write some pixel data.
- * In this module rows_supplied will always be 1.
- *
- * put_pixel_rows handles the "normal" 8-bit case where the decompressor
- * output buffer is physically the same as the fwrite buffer.
- */
-
-METHODDEF(void)
-put_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- ppm_dest_ptr dest = (ppm_dest_ptr) dinfo;
-
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-
-/*
- * This code is used when we have to copy the data and apply a pixel
- * format translation. Typically this only happens in 12-bit mode.
- */
-
-METHODDEF(void)
-copy_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- ppm_dest_ptr dest = (ppm_dest_ptr) dinfo;
- register char * bufferptr;
- register JSAMPROW ptr;
- register JDIMENSION col;
-
- ptr = dest->pub.buffer[0];
- bufferptr = dest->iobuffer;
- for (col = dest->samples_per_row; col > 0; col--) {
- PUTPPMSAMPLE(bufferptr, GETJSAMPLE(*ptr++));
- }
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-
-/*
- * Write some pixel data when color quantization is in effect.
- * We have to demap the color index values to straight data.
- */
-
-METHODDEF(void)
-put_demapped_rgb (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- ppm_dest_ptr dest = (ppm_dest_ptr) dinfo;
- register char * bufferptr;
- register int pixval;
- register JSAMPROW ptr;
- register JSAMPROW color_map0 = cinfo->colormap[0];
- register JSAMPROW color_map1 = cinfo->colormap[1];
- register JSAMPROW color_map2 = cinfo->colormap[2];
- register JDIMENSION col;
-
- ptr = dest->pub.buffer[0];
- bufferptr = dest->iobuffer;
- for (col = cinfo->output_width; col > 0; col--) {
- pixval = GETJSAMPLE(*ptr++);
- PUTPPMSAMPLE(bufferptr, GETJSAMPLE(color_map0[pixval]));
- PUTPPMSAMPLE(bufferptr, GETJSAMPLE(color_map1[pixval]));
- PUTPPMSAMPLE(bufferptr, GETJSAMPLE(color_map2[pixval]));
- }
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-
-METHODDEF(void)
-put_demapped_gray (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- ppm_dest_ptr dest = (ppm_dest_ptr) dinfo;
- register char * bufferptr;
- register JSAMPROW ptr;
- register JSAMPROW color_map = cinfo->colormap[0];
- register JDIMENSION col;
-
- ptr = dest->pub.buffer[0];
- bufferptr = dest->iobuffer;
- for (col = cinfo->output_width; col > 0; col--) {
- PUTPPMSAMPLE(bufferptr, GETJSAMPLE(color_map[GETJSAMPLE(*ptr++)]));
- }
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-
-/*
- * Startup: write the file header.
- */
-
-METHODDEF(void)
-start_output_ppm (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- ppm_dest_ptr dest = (ppm_dest_ptr) dinfo;
-
- /* Emit file header */
- switch (cinfo->out_color_space) {
- case JCS_GRAYSCALE:
- /* emit header for raw PGM format */
- fprintf(dest->pub.output_file, "P5\n%ld %ld\n%d\n",
- (long) cinfo->output_width, (long) cinfo->output_height,
- PPM_MAXVAL);
- break;
- case JCS_RGB:
- /* emit header for raw PPM format */
- fprintf(dest->pub.output_file, "P6\n%ld %ld\n%d\n",
- (long) cinfo->output_width, (long) cinfo->output_height,
- PPM_MAXVAL);
- break;
- default:
- ERREXIT(cinfo, JERR_PPM_COLORSPACE);
- }
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_output_ppm (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- /* Make sure we wrote the output file OK */
- fflush(dinfo->output_file);
- if (ferror(dinfo->output_file))
- ERREXIT(cinfo, JERR_FILE_WRITE);
-}
-
-
-/*
- * The module selection routine for PPM format output.
- */
-
-GLOBAL(djpeg_dest_ptr)
-jinit_write_ppm (j_decompress_ptr cinfo)
-{
- ppm_dest_ptr dest;
-
- /* Create module interface object, fill in method pointers */
- dest = (ppm_dest_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(ppm_dest_struct));
- dest->pub.start_output = start_output_ppm;
- dest->pub.finish_output = finish_output_ppm;
-
- /* Calculate output image dimensions so we can allocate space */
- jpeg_calc_output_dimensions(cinfo);
-
- /* Create physical I/O buffer. Note we make this near on a PC. */
- dest->samples_per_row = cinfo->output_width * cinfo->out_color_components;
- dest->buffer_width = dest->samples_per_row * (BYTESPERSAMPLE * SIZEOF(char));
- dest->iobuffer = (char *) (*cinfo->mem->alloc_small)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, dest->buffer_width);
-
- if (cinfo->quantize_colors || BITS_IN_JSAMPLE != 8 ||
- SIZEOF(JSAMPLE) != SIZEOF(char)) {
- /* When quantizing, we need an output buffer for colormap indexes
- * that's separate from the physical I/O buffer. We also need a
- * separate buffer if pixel format translation must take place.
- */
- dest->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- cinfo->output_width * cinfo->output_components, (JDIMENSION) 1);
- dest->pub.buffer_height = 1;
- if (! cinfo->quantize_colors)
- dest->pub.put_pixel_rows = copy_pixel_rows;
- else if (cinfo->out_color_space == JCS_GRAYSCALE)
- dest->pub.put_pixel_rows = put_demapped_gray;
- else
- dest->pub.put_pixel_rows = put_demapped_rgb;
- } else {
- /* We will fwrite() directly from decompressor output buffer. */
- /* Synthesize a JSAMPARRAY pointer structure */
- /* Cast here implies near->far pointer conversion on PCs */
- dest->pixrow = (JSAMPROW) dest->iobuffer;
- dest->pub.buffer = & dest->pixrow;
- dest->pub.buffer_height = 1;
- dest->pub.put_pixel_rows = put_pixel_rows;
- }
-
- return (djpeg_dest_ptr) dest;
-}
-
-#endif /* PPM_SUPPORTED */
+++ /dev/null
-/*
- * wrrle.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to write output images in RLE format.
- * The Utah Raster Toolkit library is required (version 3.1 or later).
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume output to
- * an ordinary stdio stream.
- *
- * Based on code contributed by Mike Lijewski,
- * with updates from Robert Hutchinson.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef RLE_SUPPORTED
-
-/* rle.h is provided by the Utah Raster Toolkit. */
-
-#include <rle.h>
-
-/*
- * We assume that JSAMPLE has the same representation as rle_pixel,
- * to wit, "unsigned char". Hence we can't cope with 12- or 16-bit samples.
- */
-
-#if BITS_IN_JSAMPLE != 8
- Sorry, this code only copes with 8-bit JSAMPLEs. /* deliberate syntax err */
-#endif
-
-
-/*
- * Since RLE stores scanlines bottom-to-top, we have to invert the image
- * from JPEG's top-to-bottom order. To do this, we save the outgoing data
- * in a virtual array during put_pixel_row calls, then actually emit the
- * RLE file during finish_output.
- */
-
-
-/*
- * For now, if we emit an RLE color map then it is always 256 entries long,
- * though not all of the entries need be used.
- */
-
-#define CMAPBITS 8
-#define CMAPLENGTH (1<<(CMAPBITS))
-
-typedef struct {
- struct djpeg_dest_struct pub; /* public fields */
-
- jvirt_sarray_ptr image; /* virtual array to store the output image */
- rle_map *colormap; /* RLE-style color map, or NULL if none */
- rle_pixel **rle_row; /* To pass rows to rle_putrow() */
-
-} rle_dest_struct;
-
-typedef rle_dest_struct * rle_dest_ptr;
-
-/* Forward declarations */
-METHODDEF(void) rle_put_pixel_rows
- JPP((j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied));
-
-
-/*
- * Write the file header.
- *
- * In this module it's easier to wait till finish_output to write anything.
- */
-
-METHODDEF(void)
-start_output_rle (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- rle_dest_ptr dest = (rle_dest_ptr) dinfo;
- size_t cmapsize;
- int i, ci;
-#ifdef PROGRESS_REPORT
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-#endif
-
- /*
- * Make sure the image can be stored in RLE format.
- *
- * - RLE stores image dimensions as *signed* 16 bit integers. JPEG
- * uses unsigned, so we have to check the width.
- *
- * - Colorspace is expected to be grayscale or RGB.
- *
- * - The number of channels (components) is expected to be 1 (grayscale/
- * pseudocolor) or 3 (truecolor/directcolor).
- * (could be 2 or 4 if using an alpha channel, but we aren't)
- */
-
- if (cinfo->output_width > 32767 || cinfo->output_height > 32767)
- ERREXIT2(cinfo, JERR_RLE_DIMENSIONS, cinfo->output_width,
- cinfo->output_height);
-
- if (cinfo->out_color_space != JCS_GRAYSCALE &&
- cinfo->out_color_space != JCS_RGB)
- ERREXIT(cinfo, JERR_RLE_COLORSPACE);
-
- if (cinfo->output_components != 1 && cinfo->output_components != 3)
- ERREXIT1(cinfo, JERR_RLE_TOOMANYCHANNELS, cinfo->num_components);
-
- /* Convert colormap, if any, to RLE format. */
-
- dest->colormap = NULL;
-
- if (cinfo->quantize_colors) {
- /* Allocate storage for RLE-style cmap, zero any extra entries */
- cmapsize = cinfo->out_color_components * CMAPLENGTH * SIZEOF(rle_map);
- dest->colormap = (rle_map *) (*cinfo->mem->alloc_small)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, cmapsize);
- MEMZERO(dest->colormap, cmapsize);
-
- /* Save away data in RLE format --- note 8-bit left shift! */
- /* Shifting would need adjustment for JSAMPLEs wider than 8 bits. */
- for (ci = 0; ci < cinfo->out_color_components; ci++) {
- for (i = 0; i < cinfo->actual_number_of_colors; i++) {
- dest->colormap[ci * CMAPLENGTH + i] =
- GETJSAMPLE(cinfo->colormap[ci][i]) << 8;
- }
- }
- }
-
- /* Set the output buffer to the first row */
- dest->pub.buffer = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->image, (JDIMENSION) 0, (JDIMENSION) 1, TRUE);
- dest->pub.buffer_height = 1;
-
- dest->pub.put_pixel_rows = rle_put_pixel_rows;
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->total_extra_passes++; /* count file writing as separate pass */
- }
-#endif
-}
-
-
-/*
- * Write some pixel data.
- *
- * This routine just saves the data away in a virtual array.
- */
-
-METHODDEF(void)
-rle_put_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- rle_dest_ptr dest = (rle_dest_ptr) dinfo;
-
- if (cinfo->output_scanline < cinfo->output_height) {
- dest->pub.buffer = (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->image,
- cinfo->output_scanline, (JDIMENSION) 1, TRUE);
- }
-}
-
-/*
- * Finish up at the end of the file.
- *
- * Here is where we really output the RLE file.
- */
-
-METHODDEF(void)
-finish_output_rle (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- rle_dest_ptr dest = (rle_dest_ptr) dinfo;
- rle_hdr header; /* Output file information */
- rle_pixel **rle_row, *red, *green, *blue;
- JSAMPROW output_row;
- char cmapcomment[80];
- int row, col;
- int ci;
-#ifdef PROGRESS_REPORT
- cd_progress_ptr progress = (cd_progress_ptr) cinfo->progress;
-#endif
-
- /* Initialize the header info */
- header = *rle_hdr_init(NULL);
- header.rle_file = dest->pub.output_file;
- header.xmin = 0;
- header.xmax = cinfo->output_width - 1;
- header.ymin = 0;
- header.ymax = cinfo->output_height - 1;
- header.alpha = 0;
- header.ncolors = cinfo->output_components;
- for (ci = 0; ci < cinfo->output_components; ci++) {
- RLE_SET_BIT(header, ci);
- }
- if (cinfo->quantize_colors) {
- header.ncmap = cinfo->out_color_components;
- header.cmaplen = CMAPBITS;
- header.cmap = dest->colormap;
- /* Add a comment to the output image with the true colormap length. */
- sprintf(cmapcomment, "color_map_length=%d", cinfo->actual_number_of_colors);
- rle_putcom(cmapcomment, &header);
- }
-
- /* Emit the RLE header and color map (if any) */
- rle_put_setup(&header);
-
- /* Now output the RLE data from our virtual array.
- * We assume here that (a) rle_pixel is represented the same as JSAMPLE,
- * and (b) we are not on a machine where FAR pointers differ from regular.
- */
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_limit = cinfo->output_height;
- progress->pub.pass_counter = 0;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
-
- if (cinfo->output_components == 1) {
- for (row = cinfo->output_height-1; row >= 0; row--) {
- rle_row = (rle_pixel **) (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->image,
- (JDIMENSION) row, (JDIMENSION) 1, FALSE);
- rle_putrow(rle_row, (int) cinfo->output_width, &header);
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_counter++;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
- }
- } else {
- for (row = cinfo->output_height-1; row >= 0; row--) {
- rle_row = (rle_pixel **) dest->rle_row;
- output_row = * (*cinfo->mem->access_virt_sarray)
- ((j_common_ptr) cinfo, dest->image,
- (JDIMENSION) row, (JDIMENSION) 1, FALSE);
- red = rle_row[0];
- green = rle_row[1];
- blue = rle_row[2];
- for (col = cinfo->output_width; col > 0; col--) {
- *red++ = GETJSAMPLE(*output_row++);
- *green++ = GETJSAMPLE(*output_row++);
- *blue++ = GETJSAMPLE(*output_row++);
- }
- rle_putrow(rle_row, (int) cinfo->output_width, &header);
-#ifdef PROGRESS_REPORT
- if (progress != NULL) {
- progress->pub.pass_counter++;
- (*progress->pub.progress_monitor) ((j_common_ptr) cinfo);
- }
-#endif
- }
- }
-
-#ifdef PROGRESS_REPORT
- if (progress != NULL)
- progress->completed_extra_passes++;
-#endif
-
- /* Emit file trailer */
- rle_puteof(&header);
- fflush(dest->pub.output_file);
- if (ferror(dest->pub.output_file))
- ERREXIT(cinfo, JERR_FILE_WRITE);
-}
-
-
-/*
- * The module selection routine for RLE format output.
- */
-
-GLOBAL(djpeg_dest_ptr)
-jinit_write_rle (j_decompress_ptr cinfo)
-{
- rle_dest_ptr dest;
-
- /* Create module interface object, fill in method pointers */
- dest = (rle_dest_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(rle_dest_struct));
- dest->pub.start_output = start_output_rle;
- dest->pub.finish_output = finish_output_rle;
-
- /* Calculate output image dimensions so we can allocate space */
- jpeg_calc_output_dimensions(cinfo);
-
- /* Allocate a work array for output to the RLE library. */
- dest->rle_row = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE,
- cinfo->output_width, (JDIMENSION) cinfo->output_components);
-
- /* Allocate a virtual array to hold the image. */
- dest->image = (*cinfo->mem->request_virt_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
- (JDIMENSION) (cinfo->output_width * cinfo->output_components),
- cinfo->output_height, (JDIMENSION) 1);
-
- return (djpeg_dest_ptr) dest;
-}
-
-#endif /* RLE_SUPPORTED */
+++ /dev/null
-/*
- * wrtarga.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to write output images in Targa format.
- *
- * These routines may need modification for non-Unix environments or
- * specialized applications. As they stand, they assume output to
- * an ordinary stdio stream.
- *
- * Based on code contributed by Lee Daniel Crocker.
- */
-
-#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
-
-#ifdef TARGA_SUPPORTED
-
-
-/*
- * To support 12-bit JPEG data, we'd have to scale output down to 8 bits.
- * This is not yet implemented.
- */
-
-#if BITS_IN_JSAMPLE != 8
- Sorry, this code only copes with 8-bit JSAMPLEs. /* deliberate syntax err */
-#endif
-
-/*
- * The output buffer needs to be writable by fwrite(). On PCs, we must
- * allocate the buffer in near data space, because we are assuming small-data
- * memory model, wherein fwrite() can't reach far memory. If you need to
- * process very wide images on a PC, you might have to compile in large-memory
- * model, or else replace fwrite() with a putc() loop --- which will be much
- * slower.
- */
-
-
-/* Private version of data destination object */
-
-typedef struct {
- struct djpeg_dest_struct pub; /* public fields */
-
- char *iobuffer; /* physical I/O buffer */
- JDIMENSION buffer_width; /* width of one row */
-} tga_dest_struct;
-
-typedef tga_dest_struct * tga_dest_ptr;
-
-
-LOCAL(void)
-write_header (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo, int num_colors)
-/* Create and write a Targa header */
-{
- char targaheader[18];
-
- /* Set unused fields of header to 0 */
- MEMZERO(targaheader, SIZEOF(targaheader));
-
- if (num_colors > 0) {
- targaheader[1] = 1; /* color map type 1 */
- targaheader[5] = (char) (num_colors & 0xFF);
- targaheader[6] = (char) (num_colors >> 8);
- targaheader[7] = 24; /* 24 bits per cmap entry */
- }
-
- targaheader[12] = (char) (cinfo->output_width & 0xFF);
- targaheader[13] = (char) (cinfo->output_width >> 8);
- targaheader[14] = (char) (cinfo->output_height & 0xFF);
- targaheader[15] = (char) (cinfo->output_height >> 8);
- targaheader[17] = 0x20; /* Top-down, non-interlaced */
-
- if (cinfo->out_color_space == JCS_GRAYSCALE) {
- targaheader[2] = 3; /* image type = uncompressed gray-scale */
- targaheader[16] = 8; /* bits per pixel */
- } else { /* must be RGB */
- if (num_colors > 0) {
- targaheader[2] = 1; /* image type = colormapped RGB */
- targaheader[16] = 8;
- } else {
- targaheader[2] = 2; /* image type = uncompressed RGB */
- targaheader[16] = 24;
- }
- }
-
- if (JFWRITE(dinfo->output_file, targaheader, 18) != (size_t) 18)
- ERREXIT(cinfo, JERR_FILE_WRITE);
-}
-
-
-/*
- * Write some pixel data.
- * In this module rows_supplied will always be 1.
- */
-
-METHODDEF(void)
-put_pixel_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-/* used for unquantized full-color output */
-{
- tga_dest_ptr dest = (tga_dest_ptr) dinfo;
- register JSAMPROW inptr;
- register char * outptr;
- register JDIMENSION col;
-
- inptr = dest->pub.buffer[0];
- outptr = dest->iobuffer;
- for (col = cinfo->output_width; col > 0; col--) {
- outptr[0] = (char) GETJSAMPLE(inptr[2]); /* RGB to BGR order */
- outptr[1] = (char) GETJSAMPLE(inptr[1]);
- outptr[2] = (char) GETJSAMPLE(inptr[0]);
- inptr += 3, outptr += 3;
- }
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-METHODDEF(void)
-put_gray_rows (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-/* used for grayscale OR quantized color output */
-{
- tga_dest_ptr dest = (tga_dest_ptr) dinfo;
- register JSAMPROW inptr;
- register char * outptr;
- register JDIMENSION col;
-
- inptr = dest->pub.buffer[0];
- outptr = dest->iobuffer;
- for (col = cinfo->output_width; col > 0; col--) {
- *outptr++ = (char) GETJSAMPLE(*inptr++);
- }
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-
-/*
- * Write some demapped pixel data when color quantization is in effect.
- * For Targa, this is only applied to grayscale data.
- */
-
-METHODDEF(void)
-put_demapped_gray (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo,
- JDIMENSION rows_supplied)
-{
- tga_dest_ptr dest = (tga_dest_ptr) dinfo;
- register JSAMPROW inptr;
- register char * outptr;
- register JSAMPROW color_map0 = cinfo->colormap[0];
- register JDIMENSION col;
-
- inptr = dest->pub.buffer[0];
- outptr = dest->iobuffer;
- for (col = cinfo->output_width; col > 0; col--) {
- *outptr++ = (char) GETJSAMPLE(color_map0[GETJSAMPLE(*inptr++)]);
- }
- (void) JFWRITE(dest->pub.output_file, dest->iobuffer, dest->buffer_width);
-}
-
-
-/*
- * Startup: write the file header.
- */
-
-METHODDEF(void)
-start_output_tga (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- tga_dest_ptr dest = (tga_dest_ptr) dinfo;
- int num_colors, i;
- FILE *outfile;
-
- if (cinfo->out_color_space == JCS_GRAYSCALE) {
- /* Targa doesn't have a mapped grayscale format, so we will */
- /* demap quantized gray output. Never emit a colormap. */
- write_header(cinfo, dinfo, 0);
- if (cinfo->quantize_colors)
- dest->pub.put_pixel_rows = put_demapped_gray;
- else
- dest->pub.put_pixel_rows = put_gray_rows;
- } else if (cinfo->out_color_space == JCS_RGB) {
- if (cinfo->quantize_colors) {
- /* We only support 8-bit colormap indexes, so only 256 colors */
- num_colors = cinfo->actual_number_of_colors;
- if (num_colors > 256)
- ERREXIT1(cinfo, JERR_TOO_MANY_COLORS, num_colors);
- write_header(cinfo, dinfo, num_colors);
- /* Write the colormap. Note Targa uses BGR byte order */
- outfile = dest->pub.output_file;
- for (i = 0; i < num_colors; i++) {
- putc(GETJSAMPLE(cinfo->colormap[2][i]), outfile);
- putc(GETJSAMPLE(cinfo->colormap[1][i]), outfile);
- putc(GETJSAMPLE(cinfo->colormap[0][i]), outfile);
- }
- dest->pub.put_pixel_rows = put_gray_rows;
- } else {
- write_header(cinfo, dinfo, 0);
- dest->pub.put_pixel_rows = put_pixel_rows;
- }
- } else {
- ERREXIT(cinfo, JERR_TGA_COLORSPACE);
- }
-}
-
-
-/*
- * Finish up at the end of the file.
- */
-
-METHODDEF(void)
-finish_output_tga (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo)
-{
- /* Make sure we wrote the output file OK */
- fflush(dinfo->output_file);
- if (ferror(dinfo->output_file))
- ERREXIT(cinfo, JERR_FILE_WRITE);
-}
-
-
-/*
- * The module selection routine for Targa format output.
- */
-
-GLOBAL(djpeg_dest_ptr)
-jinit_write_targa (j_decompress_ptr cinfo)
-{
- tga_dest_ptr dest;
-
- /* Create module interface object, fill in method pointers */
- dest = (tga_dest_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- SIZEOF(tga_dest_struct));
- dest->pub.start_output = start_output_tga;
- dest->pub.finish_output = finish_output_tga;
-
- /* Calculate output image dimensions so we can allocate space */
- jpeg_calc_output_dimensions(cinfo);
-
- /* Create I/O buffer. Note we make this near on a PC. */
- dest->buffer_width = cinfo->output_width * cinfo->output_components;
- dest->iobuffer = (char *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- (size_t) (dest->buffer_width * SIZEOF(char)));
-
- /* Create decompressor output buffer. */
- dest->pub.buffer = (*cinfo->mem->alloc_sarray)
- ((j_common_ptr) cinfo, JPOOL_IMAGE, dest->buffer_width, (JDIMENSION) 1);
- dest->pub.buffer_height = 1;
-
- return (djpeg_dest_ptr) dest;
-}
-
-#endif /* TARGA_SUPPORTED */
projects / libjpeg-turbo / commitdiff
