2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
6 % JJJJJ PPPP EEEEE GGGG %
13 % Read/Write JPEG Image Format %
20 % Copyright 1999-2013 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
26 % http://www.imagemagick.org/script/license.php %
28 % Unless required by applicable law or agreed to in writing, software %
29 % distributed under the License is distributed on an "AS IS" BASIS, %
30 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31 % See the License for the specific language governing permissions and %
32 % limitations under the License. %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
36 % This software is based in part on the work of the Independent JPEG Group.
37 % See ftp://ftp.uu.net/graphics/jpeg/jpegsrc.v6b.tar.gz for copyright and
38 % licensing restrictions. Blob support contributed by Glenn Randers-Pehrson.
47 #include "MagickCore/studio.h"
48 #include "MagickCore/artifact.h"
49 #include "MagickCore/attribute.h"
50 #include "MagickCore/blob.h"
51 #include "MagickCore/blob-private.h"
52 #include "MagickCore/cache.h"
53 #include "MagickCore/color.h"
54 #include "MagickCore/colormap-private.h"
55 #include "MagickCore/color-private.h"
56 #include "MagickCore/colormap.h"
57 #include "MagickCore/colorspace.h"
58 #include "MagickCore/colorspace-private.h"
59 #include "MagickCore/constitute.h"
60 #include "MagickCore/exception.h"
61 #include "MagickCore/exception-private.h"
62 #include "MagickCore/geometry.h"
63 #include "MagickCore/image.h"
64 #include "MagickCore/image-private.h"
65 #include "MagickCore/list.h"
66 #include "MagickCore/log.h"
67 #include "MagickCore/magick.h"
68 #include "MagickCore/memory_.h"
69 #include "MagickCore/module.h"
70 #include "MagickCore/monitor.h"
71 #include "MagickCore/monitor-private.h"
72 #include "MagickCore/option.h"
73 #include "MagickCore/option-private.h"
74 #include "MagickCore/pixel-accessor.h"
75 #include "MagickCore/profile.h"
76 #include "MagickCore/property.h"
77 #include "MagickCore/quantum-private.h"
78 #include "MagickCore/resource_.h"
79 #include "MagickCore/semaphore.h"
80 #include "MagickCore/splay-tree.h"
81 #include "MagickCore/static.h"
82 #include "MagickCore/string_.h"
83 #include "MagickCore/string-private.h"
84 #include "MagickCore/token.h"
85 #include "MagickCore/utility.h"
86 #include "MagickCore/xml-tree.h"
87 #include "MagickCore/xml-tree-private.h"
89 #if defined(MAGICKCORE_JPEG_DELEGATE)
90 #define JPEG_INTERNAL_OPTIONS
91 #if defined(__MINGW32__) || defined(__MINGW64__)
92 # define XMD_H 1 /* Avoid conflicting typedef for INT32 */
103 #define ICC_MARKER (JPEG_APP0+2)
104 #define ICC_PROFILE "ICC_PROFILE"
105 #define IPTC_MARKER (JPEG_APP0+13)
106 #define XML_MARKER (JPEG_APP0+1)
107 #define MaxBufferExtent 16384
111 Typedef declarations.
113 #if defined(MAGICKCORE_JPEG_DELEGATE)
114 typedef struct _DestinationManager
116 struct jpeg_destination_mgr
124 } DestinationManager;
126 typedef struct _ErrorManager
144 typedef struct _SourceManager
146 struct jpeg_source_mgr
160 typedef struct _QuantizationTable
179 Forward declarations.
181 #if defined(MAGICKCORE_JPEG_DELEGATE)
182 static MagickBooleanType
183 WriteJPEGImage(const ImageInfo *,Image *,ExceptionInfo *);
188 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
196 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
198 % IsJPEG() returns MagickTrue if the image format type, identified by the
199 % magick string, is JPEG.
201 % The format of the IsJPEG method is:
203 % MagickBooleanType IsJPEG(const unsigned char *magick,const size_t length)
205 % A description of each parameter follows:
207 % o magick: compare image format pattern against these bytes.
209 % o length: Specifies the length of the magick string.
212 static MagickBooleanType IsJPEG(const unsigned char *magick,const size_t length)
216 if (memcmp(magick,"\377\330\377",3) == 0)
222 #if defined(MAGICKCORE_JPEG_DELEGATE)
224 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
228 % R e a d J P E G I m a g e %
232 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
234 % ReadJPEGImage() reads a JPEG image file and returns it. It allocates
235 % the memory necessary for the new Image structure and returns a pointer to
238 % The format of the ReadJPEGImage method is:
240 % Image *ReadJPEGImage(const ImageInfo *image_info,
241 % ExceptionInfo *exception)
243 % A description of each parameter follows:
245 % o image_info: the image info.
247 % o exception: return any errors or warnings in this structure.
251 static boolean FillInputBuffer(j_decompress_ptr cinfo)
256 source=(SourceManager *) cinfo->src;
257 source->manager.bytes_in_buffer=(size_t) ReadBlob(source->image,
258 MaxBufferExtent,source->buffer);
259 if (source->manager.bytes_in_buffer == 0)
261 if (source->start_of_blob != FALSE)
262 ERREXIT(cinfo,JERR_INPUT_EMPTY);
263 WARNMS(cinfo,JWRN_JPEG_EOF);
264 source->buffer[0]=(JOCTET) 0xff;
265 source->buffer[1]=(JOCTET) JPEG_EOI;
266 source->manager.bytes_in_buffer=2;
268 source->manager.next_input_byte=source->buffer;
269 source->start_of_blob=FALSE;
273 static int GetCharacter(j_decompress_ptr jpeg_info)
275 if (jpeg_info->src->bytes_in_buffer == 0)
276 (void) (*jpeg_info->src->fill_input_buffer)(jpeg_info);
277 jpeg_info->src->bytes_in_buffer--;
278 return((int) GETJOCTET(*jpeg_info->src->next_input_byte++));
281 static void InitializeSource(j_decompress_ptr cinfo)
286 source=(SourceManager *) cinfo->src;
287 source->start_of_blob=TRUE;
290 static MagickBooleanType IsITUFaxImage(const Image *image)
298 profile=GetImageProfile(image,"8bim");
299 if (profile == (const StringInfo *) NULL)
301 if (GetStringInfoLength(profile) < 5)
303 datum=GetStringInfoDatum(profile);
304 if ((datum[0] == 0x47) && (datum[1] == 0x33) && (datum[2] == 0x46) &&
305 (datum[3] == 0x41) && (datum[4] == 0x58))
310 static void JPEGErrorHandler(j_common_ptr jpeg_info)
313 message[JMSG_LENGTH_MAX];
325 error_manager=(ErrorManager *) jpeg_info->client_data;
326 image=error_manager->image;
327 exception=error_manager->exception;
328 (jpeg_info->err->format_message)(jpeg_info,message);
329 if (image->debug != MagickFalse)
330 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
331 "[%s] JPEG Trace: \"%s\"",image->filename,message);
332 if (error_manager->finished != MagickFalse)
333 (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageWarning,
334 (char *) message,"`%s'",image->filename);
336 (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageError,
337 (char *) message,"`%s'",image->filename);
338 longjmp(error_manager->error_recovery,1);
341 static MagickBooleanType JPEGWarningHandler(j_common_ptr jpeg_info,int level)
343 #define JPEGExcessiveWarnings 1000
346 message[JMSG_LENGTH_MAX];
358 error_manager=(ErrorManager *) jpeg_info->client_data;
359 exception=error_manager->exception;
360 image=error_manager->image;
364 Process warning message.
366 (jpeg_info->err->format_message)(jpeg_info,message);
367 if (jpeg_info->err->num_warnings++ > JPEGExcessiveWarnings)
368 JPEGErrorHandler(jpeg_info);
369 ThrowBinaryException(CorruptImageWarning,(char *) message,
373 if ((image->debug != MagickFalse) &&
374 (level >= jpeg_info->err->trace_level))
377 Process trace message.
379 (jpeg_info->err->format_message)(jpeg_info,message);
380 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
381 "[%s] JPEG Trace: \"%s\"",image->filename,message);
386 static boolean ReadComment(j_decompress_ptr jpeg_info)
397 register unsigned char
410 Determine length of comment.
412 error_manager=(ErrorManager *) jpeg_info->client_data;
413 exception=error_manager->exception;
414 image=error_manager->image;
415 length=(size_t) ((size_t) GetCharacter(jpeg_info) << 8);
416 length+=GetCharacter(jpeg_info);
420 comment=BlobToStringInfo((const void *) NULL,length);
421 if (comment == (StringInfo *) NULL)
423 (void) ThrowMagickException(exception,GetMagickModule(),
424 ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
430 error_manager->profile=comment;
431 p=GetStringInfoDatum(comment);
432 for (i=0; i < (ssize_t) GetStringInfoLength(comment); i++)
433 *p++=(unsigned char) GetCharacter(jpeg_info);
435 error_manager->profile=NULL;
436 p=GetStringInfoDatum(comment);
437 (void) SetImageProperty(image,"comment",(const char *) p,exception);
438 comment=DestroyStringInfo(comment);
442 static boolean ReadICCProfile(j_decompress_ptr jpeg_info)
462 register unsigned char
475 length=(size_t) ((size_t) GetCharacter(jpeg_info) << 8);
476 length+=(size_t) GetCharacter(jpeg_info);
481 (void) GetCharacter(jpeg_info);
484 for (i=0; i < 12; i++)
485 magick[i]=(char) GetCharacter(jpeg_info);
486 if (LocaleCompare(magick,ICC_PROFILE) != 0)
489 Not a ICC profile, return.
491 for (i=0; i < (ssize_t) (length-12); i++)
492 (void) GetCharacter(jpeg_info);
495 (void) GetCharacter(jpeg_info); /* id */
496 (void) GetCharacter(jpeg_info); /* markers */
498 error_manager=(ErrorManager *) jpeg_info->client_data;
499 exception=error_manager->exception;
500 image=error_manager->image;
501 profile=BlobToStringInfo((const void *) NULL,length);
502 if (profile == (StringInfo *) NULL)
504 (void) ThrowMagickException(exception,GetMagickModule(),
505 ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
508 error_manager->profile=profile;
509 p=GetStringInfoDatum(profile);
510 for (i=(ssize_t) GetStringInfoLength(profile)-1; i >= 0; i--)
511 *p++=(unsigned char) GetCharacter(jpeg_info);
512 error_manager->profile=NULL;
513 icc_profile=(StringInfo *) GetImageProfile(image,"icc");
514 if (icc_profile != (StringInfo *) NULL)
516 ConcatenateStringInfo(icc_profile,profile);
517 profile=DestroyStringInfo(profile);
521 status=SetImageProfile(image,"icc",profile,exception);
522 profile=DestroyStringInfo(profile);
523 if (status == MagickFalse)
525 (void) ThrowMagickException(exception,GetMagickModule(),
526 ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
530 if (image->debug != MagickFalse)
531 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
532 "Profile: ICC, %.20g bytes",(double) length);
536 static boolean ReadIPTCProfile(j_decompress_ptr jpeg_info)
539 magick[MaxTextExtent];
556 register unsigned char
567 Determine length of binary data stored here.
569 length=(size_t) ((size_t) GetCharacter(jpeg_info) << 8);
570 length+=(size_t) GetCharacter(jpeg_info);
575 (void) GetCharacter(jpeg_info);
579 Validate that this was written as a Photoshop resource format slug.
581 for (i=0; i < 10; i++)
582 magick[i]=(char) GetCharacter(jpeg_info);
587 if (LocaleCompare(magick,"Photoshop ") != 0)
590 Not a IPTC profile, return.
592 for (i=0; i < (ssize_t) length; i++)
593 (void) GetCharacter(jpeg_info);
597 Remove the version number.
599 for (i=0; i < 4; i++)
600 (void) GetCharacter(jpeg_info);
604 error_manager=(ErrorManager *) jpeg_info->client_data;
605 exception=error_manager->exception;
606 image=error_manager->image;
607 profile=BlobToStringInfo((const void *) NULL,length);
608 if (profile == (StringInfo *) NULL)
610 (void) ThrowMagickException(exception,GetMagickModule(),
611 ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
614 error_manager->profile=profile;
615 p=GetStringInfoDatum(profile);
616 for (i=0; i < (ssize_t) GetStringInfoLength(profile); i++)
617 *p++=(unsigned char) GetCharacter(jpeg_info);
618 error_manager->profile=NULL;
619 iptc_profile=(StringInfo *) GetImageProfile(image,"8bim");
620 if (iptc_profile != (StringInfo *) NULL)
622 ConcatenateStringInfo(iptc_profile,profile);
623 profile=DestroyStringInfo(profile);
627 status=SetImageProfile(image,"8bim",profile,exception);
628 profile=DestroyStringInfo(profile);
629 if (status == MagickFalse)
631 (void) ThrowMagickException(exception,GetMagickModule(),
632 ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
636 if (image->debug != MagickFalse)
637 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
638 "Profile: iptc, %.20g bytes",(double) length);
642 static boolean ReadProfile(j_decompress_ptr jpeg_info)
668 register unsigned char
678 Read generic profile.
680 length=(size_t) ((size_t) GetCharacter(jpeg_info) << 8);
681 length+=(size_t) GetCharacter(jpeg_info);
685 marker=jpeg_info->unread_marker-JPEG_APP0;
686 (void) FormatLocaleString(name,MaxTextExtent,"APP%d",marker);
687 error_manager=(ErrorManager *) jpeg_info->client_data;
688 exception=error_manager->exception;
689 image=error_manager->image;
690 profile=BlobToStringInfo((const void *) NULL,length);
691 if (profile == (StringInfo *) NULL)
693 (void) ThrowMagickException(exception,GetMagickModule(),
694 ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
697 error_manager->profile=profile;
698 p=GetStringInfoDatum(profile);
699 for (i=0; i < (ssize_t) GetStringInfoLength(profile); i++)
700 *p++=(unsigned char) GetCharacter(jpeg_info);
701 error_manager->profile=NULL;
704 p=GetStringInfoDatum(profile);
705 if ((length > 4) && (LocaleNCompare((char *) p,"exif",4) == 0))
706 (void) CopyMagickString(name,"exif",MaxTextExtent);
707 if ((length > 5) && (LocaleNCompare((char *) p,"http:",5) == 0))
713 Extract namespace from XMP profile.
715 p=GetStringInfoDatum(profile);
716 for (j=0; j < (ssize_t) GetStringInfoLength(profile); j++)
722 if (j < (ssize_t) GetStringInfoLength(profile))
723 (void) DestroyStringInfo(SplitStringInfo(profile,(size_t) (j+1)));
724 (void) CopyMagickString(name,"xmp",MaxTextExtent);
727 previous_profile=GetImageProfile(image,name);
728 if (previous_profile != (const StringInfo *) NULL)
733 length=GetStringInfoLength(profile);
734 SetStringInfoLength(profile,GetStringInfoLength(profile)+
735 GetStringInfoLength(previous_profile));
736 (void) memmove(GetStringInfoDatum(profile)+
737 GetStringInfoLength(previous_profile),GetStringInfoDatum(profile),
739 (void) memcpy(GetStringInfoDatum(profile),
740 GetStringInfoDatum(previous_profile),
741 GetStringInfoLength(previous_profile));
743 status=SetImageProfile(image,name,profile,exception);
744 profile=DestroyStringInfo(profile);
745 if (status == MagickFalse)
747 (void) ThrowMagickException(exception,GetMagickModule(),
748 ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
751 if (image->debug != MagickFalse)
752 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
753 "Profile: %s, %.20g bytes",name,(double) length);
757 static void SkipInputData(j_decompress_ptr cinfo,long number_bytes)
762 if (number_bytes <= 0)
764 source=(SourceManager *) cinfo->src;
765 while (number_bytes > (long) source->manager.bytes_in_buffer)
767 number_bytes-=(long) source->manager.bytes_in_buffer;
768 (void) FillInputBuffer(cinfo);
770 source->manager.next_input_byte+=number_bytes;
771 source->manager.bytes_in_buffer-=number_bytes;
774 static void TerminateSource(j_decompress_ptr cinfo)
779 static void JPEGSourceManager(j_decompress_ptr cinfo,Image *image)
784 cinfo->src=(struct jpeg_source_mgr *) (*cinfo->mem->alloc_small)
785 ((j_common_ptr) cinfo,JPOOL_IMAGE,sizeof(SourceManager));
786 source=(SourceManager *) cinfo->src;
787 source->buffer=(JOCTET *) (*cinfo->mem->alloc_small)
788 ((j_common_ptr) cinfo,JPOOL_IMAGE,MaxBufferExtent*sizeof(JOCTET));
789 source=(SourceManager *) cinfo->src;
790 source->manager.init_source=InitializeSource;
791 source->manager.fill_input_buffer=FillInputBuffer;
792 source->manager.skip_input_data=SkipInputData;
793 source->manager.resync_to_restart=jpeg_resync_to_restart;
794 source->manager.term_source=TerminateSource;
795 source->manager.bytes_in_buffer=0;
796 source->manager.next_input_byte=NULL;
800 static void JPEGSetImageQuality(struct jpeg_decompress_struct *jpeg_info,
801 Image *image, ExceptionInfo *exception)
803 image->quality=UndefinedCompressionQuality;
804 #if defined(D_PROGRESSIVE_SUPPORTED)
805 if (image->compression == LosslessJPEGCompression)
808 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
809 "Quality: 100 (lossless)");
823 Determine the JPEG compression quality from the quantization tables.
826 for (i=0; i < NUM_QUANT_TBLS; i++)
828 if (jpeg_info->quant_tbl_ptrs[i] != NULL)
829 for (j=0; j < DCTSIZE2; j++)
830 sum+=jpeg_info->quant_tbl_ptrs[i]->quantval[j];
832 if ((jpeg_info->quant_tbl_ptrs[0] != NULL) &&
833 (jpeg_info->quant_tbl_ptrs[1] != NULL))
838 1020, 1015, 932, 848, 780, 735, 702, 679, 660, 645,
839 632, 623, 613, 607, 600, 594, 589, 585, 581, 571,
840 555, 542, 529, 514, 494, 474, 457, 439, 424, 410,
841 397, 386, 373, 364, 351, 341, 334, 324, 317, 309,
842 299, 294, 287, 279, 274, 267, 262, 257, 251, 247,
843 243, 237, 232, 227, 222, 217, 213, 207, 202, 198,
844 192, 188, 183, 177, 173, 168, 163, 157, 153, 148,
845 143, 139, 132, 128, 125, 119, 115, 108, 104, 99,
846 94, 90, 84, 79, 74, 70, 64, 59, 55, 49,
847 45, 40, 34, 30, 25, 20, 15, 11, 6, 4,
852 32640, 32635, 32266, 31495, 30665, 29804, 29146, 28599, 28104,
853 27670, 27225, 26725, 26210, 25716, 25240, 24789, 24373, 23946,
854 23572, 22846, 21801, 20842, 19949, 19121, 18386, 17651, 16998,
855 16349, 15800, 15247, 14783, 14321, 13859, 13535, 13081, 12702,
856 12423, 12056, 11779, 11513, 11135, 10955, 10676, 10392, 10208,
857 9928, 9747, 9564, 9369, 9193, 9017, 8822, 8639, 8458,
858 8270, 8084, 7896, 7710, 7527, 7347, 7156, 6977, 6788,
859 6607, 6422, 6236, 6054, 5867, 5684, 5495, 5305, 5128,
860 4945, 4751, 4638, 4442, 4248, 4065, 3888, 3698, 3509,
861 3326, 3139, 2957, 2775, 2586, 2405, 2216, 2037, 1846,
862 1666, 1483, 1297, 1109, 927, 735, 554, 375, 201,
866 qvalue=(ssize_t) (jpeg_info->quant_tbl_ptrs[0]->quantval[2]+
867 jpeg_info->quant_tbl_ptrs[0]->quantval[53]+
868 jpeg_info->quant_tbl_ptrs[1]->quantval[0]+
869 jpeg_info->quant_tbl_ptrs[1]->quantval[DCTSIZE2-1]);
870 for (i=0; i < 100; i++)
872 if ((qvalue < hash[i]) && (sum < sums[i]))
874 if (((qvalue <= hash[i]) && (sum <= sums[i])) || (i >= 50))
875 image->quality=(size_t) i+1;
876 if (image->debug != MagickFalse)
877 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
878 "Quality: %.20g (%s)",(double) i+1,(qvalue <= hash[i]) &&
879 (sum <= sums[i]) ? "exact" : "approximate");
884 if (jpeg_info->quant_tbl_ptrs[0] != NULL)
889 510, 505, 422, 380, 355, 338, 326, 318, 311, 305,
890 300, 297, 293, 291, 288, 286, 284, 283, 281, 280,
891 279, 278, 277, 273, 262, 251, 243, 233, 225, 218,
892 211, 205, 198, 193, 186, 181, 177, 172, 168, 164,
893 158, 156, 152, 148, 145, 142, 139, 136, 133, 131,
894 129, 126, 123, 120, 118, 115, 113, 110, 107, 105,
895 102, 100, 97, 94, 92, 89, 87, 83, 81, 79,
896 76, 74, 70, 68, 66, 63, 61, 57, 55, 52,
897 50, 48, 44, 42, 39, 37, 34, 31, 29, 26,
898 24, 21, 18, 16, 13, 11, 8, 6, 3, 2,
903 16320, 16315, 15946, 15277, 14655, 14073, 13623, 13230, 12859,
904 12560, 12240, 11861, 11456, 11081, 10714, 10360, 10027, 9679,
905 9368, 9056, 8680, 8331, 7995, 7668, 7376, 7084, 6823,
906 6562, 6345, 6125, 5939, 5756, 5571, 5421, 5240, 5086,
907 4976, 4829, 4719, 4616, 4463, 4393, 4280, 4166, 4092,
908 3980, 3909, 3835, 3755, 3688, 3621, 3541, 3467, 3396,
909 3323, 3247, 3170, 3096, 3021, 2952, 2874, 2804, 2727,
910 2657, 2583, 2509, 2437, 2362, 2290, 2211, 2136, 2068,
911 1996, 1915, 1858, 1773, 1692, 1620, 1552, 1477, 1398,
912 1326, 1251, 1179, 1109, 1031, 961, 884, 814, 736,
913 667, 592, 518, 441, 369, 292, 221, 151, 86,
917 qvalue=(ssize_t) (jpeg_info->quant_tbl_ptrs[0]->quantval[2]+
918 jpeg_info->quant_tbl_ptrs[0]->quantval[53]);
919 for (i=0; i < 100; i++)
921 if ((qvalue < hash[i]) && (sum < sums[i]))
923 if (((qvalue <= hash[i]) && (sum <= sums[i])) || (i >= 50))
924 image->quality=(size_t)i+1;
925 if (image->debug != MagickFalse)
926 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
927 "Quality: %.20g (%s)",(double) i+1,(qvalue <= hash[i]) &&
928 (sum <= sums[i]) ? "exact" : "approximate");
935 static void JPEGSetImageSamplingFactor(struct jpeg_decompress_struct *jpeg_info, Image *image,ExceptionInfo *exception)
938 sampling_factor[MaxTextExtent];
940 switch (jpeg_info->out_color_space)
944 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Colorspace: CMYK");
945 (void) FormatLocaleString(sampling_factor,MaxTextExtent,
946 "%dx%d,%dx%d,%dx%d,%dx%d",jpeg_info->comp_info[0].h_samp_factor,
947 jpeg_info->comp_info[0].v_samp_factor,
948 jpeg_info->comp_info[1].h_samp_factor,
949 jpeg_info->comp_info[1].v_samp_factor,
950 jpeg_info->comp_info[2].h_samp_factor,
951 jpeg_info->comp_info[2].v_samp_factor,
952 jpeg_info->comp_info[3].h_samp_factor,
953 jpeg_info->comp_info[3].v_samp_factor);
958 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
959 "Colorspace: GRAYSCALE");
960 (void) FormatLocaleString(sampling_factor,MaxTextExtent,"%dx%d",
961 jpeg_info->comp_info[0].h_samp_factor,
962 jpeg_info->comp_info[0].v_samp_factor);
967 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Colorspace: RGB");
968 (void) FormatLocaleString(sampling_factor,MaxTextExtent,
969 "%dx%d,%dx%d,%dx%d",jpeg_info->comp_info[0].h_samp_factor,
970 jpeg_info->comp_info[0].v_samp_factor,
971 jpeg_info->comp_info[1].h_samp_factor,
972 jpeg_info->comp_info[1].v_samp_factor,
973 jpeg_info->comp_info[2].h_samp_factor,
974 jpeg_info->comp_info[2].v_samp_factor);
979 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Colorspace: %d",
980 jpeg_info->out_color_space);
981 (void) FormatLocaleString(sampling_factor,MaxTextExtent,
982 "%dx%d,%dx%d,%dx%d,%dx%d",jpeg_info->comp_info[0].h_samp_factor,
983 jpeg_info->comp_info[0].v_samp_factor,
984 jpeg_info->comp_info[1].h_samp_factor,
985 jpeg_info->comp_info[1].v_samp_factor,
986 jpeg_info->comp_info[2].h_samp_factor,
987 jpeg_info->comp_info[2].v_samp_factor,
988 jpeg_info->comp_info[3].h_samp_factor,
989 jpeg_info->comp_info[3].v_samp_factor);
993 (void) SetImageProperty(image,"jpeg:sampling-factor",sampling_factor,
995 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Sampling Factors: %s",
999 static Image *ReadJPEGImage(const ImageInfo *image_info,
1000 ExceptionInfo *exception)
1003 value[MaxTextExtent];
1015 *volatile jpeg_pixels;
1036 struct jpeg_decompress_struct
1039 struct jpeg_error_mgr
1054 assert(image_info != (const ImageInfo *) NULL);
1055 assert(image_info->signature == MagickSignature);
1056 if (image_info->debug != MagickFalse)
1057 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
1058 image_info->filename);
1059 assert(exception != (ExceptionInfo *) NULL);
1060 assert(exception->signature == MagickSignature);
1061 debug=IsEventLogging();
1063 image=AcquireImage(image_info,exception);
1064 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
1065 if (status == MagickFalse)
1067 image=DestroyImageList(image);
1068 return((Image *) NULL);
1071 Initialize JPEG parameters.
1073 (void) ResetMagickMemory(&error_manager,0,sizeof(error_manager));
1074 (void) ResetMagickMemory(&jpeg_info,0,sizeof(jpeg_info));
1075 (void) ResetMagickMemory(&jpeg_error,0,sizeof(jpeg_error));
1076 jpeg_info.err=jpeg_std_error(&jpeg_error);
1077 jpeg_info.err->emit_message=(void (*)(j_common_ptr,int)) JPEGWarningHandler;
1078 jpeg_info.err->error_exit=(void (*)(j_common_ptr)) JPEGErrorHandler;
1079 memory_info=(MemoryInfo *) NULL;
1080 error_manager.exception=exception;
1081 error_manager.image=image;
1082 if (setjmp(error_manager.error_recovery) != 0)
1084 jpeg_destroy_decompress(&jpeg_info);
1085 if (error_manager.profile != (StringInfo *) NULL)
1086 error_manager.profile=DestroyStringInfo(error_manager.profile);
1087 (void) CloseBlob(image);
1088 number_pixels=(MagickSizeType) image->columns*image->rows;
1089 if (number_pixels != 0)
1090 return(GetFirstImageInList(image));
1091 return(DestroyImage(image));
1093 jpeg_info.client_data=(void *) &error_manager;
1094 jpeg_create_decompress(&jpeg_info);
1095 JPEGSourceManager(&jpeg_info,image);
1096 jpeg_set_marker_processor(&jpeg_info,JPEG_COM,ReadComment);
1097 option=GetImageOption(image_info,"profile:skip");
1098 if (IsOptionMember("ICC",option) == MagickFalse)
1099 jpeg_set_marker_processor(&jpeg_info,ICC_MARKER,ReadICCProfile);
1100 if (IsOptionMember("IPTC",option) == MagickFalse)
1101 jpeg_set_marker_processor(&jpeg_info,IPTC_MARKER,ReadIPTCProfile);
1102 for (i=1; i < 16; i++)
1103 if ((i != 2) && (i != 13) && (i != 14))
1104 if (IsOptionMember("APP",option) == MagickFalse)
1105 jpeg_set_marker_processor(&jpeg_info,(int) (JPEG_APP0+i),ReadProfile);
1106 i=(ssize_t) jpeg_read_header(&jpeg_info,TRUE);
1107 if ((image_info->colorspace == YCbCrColorspace) ||
1108 (image_info->colorspace == Rec601YCbCrColorspace) ||
1109 (image_info->colorspace == Rec709YCbCrColorspace))
1110 jpeg_info.out_color_space=JCS_YCbCr;
1112 Set image resolution.
1115 if ((jpeg_info.saw_JFIF_marker != 0) && (jpeg_info.X_density != 1) &&
1116 (jpeg_info.Y_density != 1))
1118 image->resolution.x=(double) jpeg_info.X_density;
1119 image->resolution.y=(double) jpeg_info.Y_density;
1120 units=(size_t) jpeg_info.density_unit;
1123 image->units=PixelsPerInchResolution;
1125 image->units=PixelsPerCentimeterResolution;
1126 number_pixels=(MagickSizeType) image->columns*image->rows;
1127 option=GetImageOption(image_info,"jpeg:size");
1128 if ((option != (const char *) NULL) &&
1129 (jpeg_info.out_color_space != JCS_YCbCr))
1143 flags=ParseGeometry(option,&geometry_info);
1144 if ((flags & SigmaValue) == 0)
1145 geometry_info.sigma=geometry_info.rho;
1146 jpeg_calc_output_dimensions(&jpeg_info);
1147 image->magick_columns=jpeg_info.output_width;
1148 image->magick_rows=jpeg_info.output_height;
1150 if (geometry_info.rho != 0.0)
1151 scale_factor=jpeg_info.output_width/geometry_info.rho;
1152 if ((geometry_info.sigma != 0.0) &&
1153 (scale_factor > (jpeg_info.output_height/geometry_info.sigma)))
1154 scale_factor=jpeg_info.output_height/geometry_info.sigma;
1155 jpeg_info.scale_num=1U;
1156 jpeg_info.scale_denom=(unsigned int) scale_factor;
1157 jpeg_calc_output_dimensions(&jpeg_info);
1158 if (image->debug != MagickFalse)
1159 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1160 "Scale factor: %.20g",(double) scale_factor);
1162 #if (JPEG_LIB_VERSION >= 61) && defined(D_PROGRESSIVE_SUPPORTED)
1163 #if defined(D_LOSSLESS_SUPPORTED)
1164 image->interlace=jpeg_info.process == JPROC_PROGRESSIVE ?
1165 JPEGInterlace : NoInterlace;
1166 image->compression=jpeg_info.process == JPROC_LOSSLESS ?
1167 LosslessJPEGCompression : JPEGCompression;
1168 if (jpeg_info.data_precision > 8)
1169 (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
1170 "12-bit JPEG not supported. Reducing pixel data to 8 bits","`%s'",
1172 if (jpeg_info.data_precision == 16)
1173 jpeg_info.data_precision=12;
1175 image->interlace=jpeg_info.progressive_mode != 0 ? JPEGInterlace :
1177 image->compression=JPEGCompression;
1180 image->compression=JPEGCompression;
1181 image->interlace=JPEGInterlace;
1183 option=GetImageOption(image_info,"jpeg:colors");
1184 if (option != (const char *) NULL)
1187 Let the JPEG library quantize the image.
1189 jpeg_info.quantize_colors=TRUE;
1190 jpeg_info.desired_number_of_colors=(int) StringToUnsignedLong(option);
1192 option=GetImageOption(image_info,"jpeg:block-smoothing");
1193 if (option != (const char *) NULL)
1194 jpeg_info.do_block_smoothing=IsStringTrue(option) != MagickFalse ? TRUE :
1196 jpeg_info.dct_method=JDCT_FLOAT;
1197 option=GetImageOption(image_info,"jpeg:dct-method");
1198 if (option != (const char *) NULL)
1204 if (LocaleCompare(option,"default") == 0)
1205 jpeg_info.dct_method=JDCT_DEFAULT;
1211 if (LocaleCompare(option,"fastest") == 0)
1212 jpeg_info.dct_method=JDCT_FASTEST;
1213 if (LocaleCompare(option,"float") == 0)
1214 jpeg_info.dct_method=JDCT_FLOAT;
1220 if (LocaleCompare(option,"ifast") == 0)
1221 jpeg_info.dct_method=JDCT_IFAST;
1222 if (LocaleCompare(option,"islow") == 0)
1223 jpeg_info.dct_method=JDCT_ISLOW;
1227 option=GetImageOption(image_info,"jpeg:fancy-upsampling");
1228 if (option != (const char *) NULL)
1229 jpeg_info.do_fancy_upsampling=IsStringTrue(option) != MagickFalse ? TRUE :
1231 (void) jpeg_start_decompress(&jpeg_info);
1232 image->columns=jpeg_info.output_width;
1233 image->rows=jpeg_info.output_height;
1234 image->depth=(size_t) jpeg_info.data_precision;
1235 switch (jpeg_info.out_color_space)
1240 (void) SetImageColorspace(image,sRGBColorspace,exception);
1245 (void) SetImageColorspace(image,GRAYColorspace,exception);
1250 (void) SetImageColorspace(image,YCbCrColorspace,exception);
1255 (void) SetImageColorspace(image,CMYKColorspace,exception);
1259 if (IsITUFaxImage(image) != MagickFalse)
1261 (void) SetImageColorspace(image,LabColorspace,exception);
1262 jpeg_info.out_color_space=JCS_YCbCr;
1264 option=GetImageOption(image_info,"jpeg:colors");
1265 if (option != (const char *) NULL)
1266 if (AcquireImageColormap(image,StringToUnsignedLong(option),exception)
1268 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1269 if ((jpeg_info.output_components == 1) &&
1270 (jpeg_info.quantize_colors == MagickFalse))
1275 colors=(size_t) GetQuantumRange(image->depth)+1;
1276 if (AcquireImageColormap(image,colors,exception) == MagickFalse)
1277 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1279 if (image->debug != MagickFalse)
1281 if (image->interlace != NoInterlace)
1282 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1283 "Interlace: progressive");
1285 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1286 "Interlace: nonprogressive");
1287 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Data precision: %d",
1288 (int) jpeg_info.data_precision);
1289 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Geometry: %dx%d",
1290 (int) jpeg_info.output_width,(int) jpeg_info.output_height);
1292 JPEGSetImageQuality(&jpeg_info,image,exception);
1293 JPEGSetImageSamplingFactor(&jpeg_info,image,exception);
1294 (void) FormatLocaleString(value,MaxTextExtent,"%.20g",(double)
1295 jpeg_info.out_color_space);
1296 (void) SetImageProperty(image,"jpeg:colorspace",value,exception);
1297 if (image_info->ping != MagickFalse)
1299 jpeg_destroy_decompress(&jpeg_info);
1300 (void) CloseBlob(image);
1301 return(GetFirstImageInList(image));
1303 status=SetImageExtent(image,image->columns,image->rows,exception);
1304 if (status == MagickFalse)
1306 jpeg_destroy_decompress(&jpeg_info);
1307 return(DestroyImageList(image));
1309 if ((jpeg_info.output_components != 1) &&
1310 (jpeg_info.output_components != 3) && (jpeg_info.output_components != 4))
1312 jpeg_destroy_decompress(&jpeg_info);
1313 ThrowReaderException(CorruptImageError,"ImageTypeNotSupported");
1315 memory_info=AcquireVirtualMemory((size_t) image->columns,
1316 jpeg_info.output_components*sizeof(*jpeg_pixels));
1317 if (memory_info == (MemoryInfo *) NULL)
1319 jpeg_destroy_decompress(&jpeg_info);
1320 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1322 jpeg_pixels=(JSAMPLE *) GetVirtualMemoryBlob(memory_info);
1324 Convert JPEG pixels to pixel packets.
1326 if (setjmp(error_manager.error_recovery) != 0)
1328 if (memory_info != (MemoryInfo *) NULL)
1329 memory_info=RelinquishVirtualMemory(memory_info);
1330 jpeg_destroy_decompress(&jpeg_info);
1331 (void) CloseBlob(image);
1332 number_pixels=(MagickSizeType) image->columns*image->rows;
1333 if (number_pixels != 0)
1334 return(GetFirstImageInList(image));
1335 return(DestroyImage(image));
1337 if (jpeg_info.quantize_colors != MagickFalse)
1339 image->colors=(size_t) jpeg_info.actual_number_of_colors;
1340 if (jpeg_info.out_color_space == JCS_GRAYSCALE)
1341 for (i=0; i < (ssize_t) image->colors; i++)
1343 image->colormap[i].red=(double) ScaleCharToQuantum(
1344 jpeg_info.colormap[0][i]);
1345 image->colormap[i].green=image->colormap[i].red;
1346 image->colormap[i].blue=image->colormap[i].red;
1347 image->colormap[i].alpha=OpaqueAlpha;
1350 for (i=0; i < (ssize_t) image->colors; i++)
1352 image->colormap[i].red=(double) ScaleCharToQuantum(
1353 jpeg_info.colormap[0][i]);
1354 image->colormap[i].green=(double) ScaleCharToQuantum(
1355 jpeg_info.colormap[1][i]);
1356 image->colormap[i].blue=(double) ScaleCharToQuantum(
1357 jpeg_info.colormap[2][i]);
1358 image->colormap[i].alpha=OpaqueAlpha;
1361 scanline[0]=(JSAMPROW) jpeg_pixels;
1362 for (y=0; y < (ssize_t) image->rows; y++)
1370 if (jpeg_read_scanlines(&jpeg_info,scanline,1) != 1)
1372 (void) ThrowMagickException(exception,GetMagickModule(),
1373 CorruptImageWarning,"SkipToSyncByte","`%s'",image->filename);
1377 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1378 if (q == (Quantum *) NULL)
1380 if (jpeg_info.data_precision > 8)
1385 scale=65535U/GetQuantumRange(jpeg_info.data_precision);
1386 if (jpeg_info.output_components == 1)
1387 for (x=0; x < (ssize_t) image->columns; x++)
1392 pixel=(size_t) (scale*GETJSAMPLE(*p));
1393 index=ConstrainColormapIndex(image,pixel,exception);
1394 SetPixelIndex(image,index,q);
1395 SetPixelViaPixelInfo(image,image->colormap+(ssize_t) index,q);
1397 q+=GetPixelChannels(image);
1400 if (image->colorspace != CMYKColorspace)
1401 for (x=0; x < (ssize_t) image->columns; x++)
1403 SetPixelRed(image,ScaleShortToQuantum(scale*GETJSAMPLE(*p++)),
1405 SetPixelGreen(image,ScaleShortToQuantum(scale*GETJSAMPLE(*p++)),
1407 SetPixelBlue(image,ScaleShortToQuantum(scale*GETJSAMPLE(*p++)),
1409 SetPixelAlpha(image,OpaqueAlpha,q);
1410 q+=GetPixelChannels(image);
1413 for (x=0; x < (ssize_t) image->columns; x++)
1415 SetPixelCyan(image,QuantumRange-ScaleShortToQuantum(scale*
1416 GETJSAMPLE(*p++)),q);
1417 SetPixelMagenta(image,QuantumRange-ScaleShortToQuantum(scale*
1418 GETJSAMPLE(*p++)),q);
1419 SetPixelYellow(image,QuantumRange-ScaleShortToQuantum(scale*
1420 GETJSAMPLE(*p++)),q);
1421 SetPixelBlack(image,QuantumRange-ScaleShortToQuantum(scale*
1422 GETJSAMPLE(*p++)),q);
1423 SetPixelAlpha(image,OpaqueAlpha,q);
1424 q+=GetPixelChannels(image);
1428 if (jpeg_info.output_components == 1)
1429 for (x=0; x < (ssize_t) image->columns; x++)
1431 index=ConstrainColormapIndex(image,(size_t) GETJSAMPLE(*p),exception);
1432 SetPixelIndex(image,index,q);
1433 SetPixelViaPixelInfo(image,image->colormap+(ssize_t) index,q);
1435 q+=GetPixelChannels(image);
1438 if (image->colorspace != CMYKColorspace)
1439 for (x=0; x < (ssize_t) image->columns; x++)
1441 SetPixelRed(image,ScaleCharToQuantum((unsigned char)
1442 GETJSAMPLE(*p++)),q);
1443 SetPixelGreen(image,ScaleCharToQuantum((unsigned char)
1444 GETJSAMPLE(*p++)),q);
1445 SetPixelBlue(image,ScaleCharToQuantum((unsigned char)
1446 GETJSAMPLE(*p++)),q);
1447 SetPixelAlpha(image,OpaqueAlpha,q);
1448 q+=GetPixelChannels(image);
1451 for (x=0; x < (ssize_t) image->columns; x++)
1453 SetPixelCyan(image,QuantumRange-ScaleCharToQuantum(
1454 (unsigned char) GETJSAMPLE(*p++)),q);
1455 SetPixelMagenta(image,QuantumRange-ScaleCharToQuantum(
1456 (unsigned char) GETJSAMPLE(*p++)),q);
1457 SetPixelYellow(image,QuantumRange-ScaleCharToQuantum(
1458 (unsigned char) GETJSAMPLE(*p++)),q);
1459 SetPixelBlack(image,QuantumRange-ScaleCharToQuantum(
1460 (unsigned char) GETJSAMPLE(*p++)),q);
1461 SetPixelAlpha(image,OpaqueAlpha,q);
1462 q+=GetPixelChannels(image);
1464 if (SyncAuthenticPixels(image,exception) == MagickFalse)
1466 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1468 if (status == MagickFalse)
1470 jpeg_abort_decompress(&jpeg_info);
1474 if (status != MagickFalse)
1476 error_manager.finished=MagickTrue;
1477 if (setjmp(error_manager.error_recovery) == 0)
1478 (void) jpeg_finish_decompress(&jpeg_info);
1481 Free jpeg resources.
1483 jpeg_destroy_decompress(&jpeg_info);
1484 memory_info=RelinquishVirtualMemory(memory_info);
1485 (void) CloseBlob(image);
1486 return(GetFirstImageInList(image));
1492 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1496 % R e g i s t e r J P E G I m a g e %
1500 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1502 % RegisterJPEGImage() adds properties for the JPEG image format to
1503 % the list of supported formats. The properties include the image format
1504 % tag, a method to read and/or write the format, whether the format
1505 % supports the saving of more than one frame to the same file or blob,
1506 % whether the format supports native in-memory I/O, and a brief
1507 % description of the format.
1509 % The format of the RegisterJPEGImage method is:
1511 % size_t RegisterJPEGImage(void)
1514 ModuleExport size_t RegisterJPEGImage(void)
1517 version[MaxTextExtent];
1523 description[] = "Joint Photographic Experts Group JFIF format";
1526 #if defined(JPEG_LIB_VERSION)
1527 (void) FormatLocaleString(version,MaxTextExtent,"%d",JPEG_LIB_VERSION);
1529 entry=SetMagickInfo("JPE");
1530 #if (JPEG_LIB_VERSION < 80) && !defined(LIBJPEG_TURBO_VERSION)
1531 entry->thread_support=NoThreadSupport;
1533 #if defined(MAGICKCORE_JPEG_DELEGATE)
1534 entry->decoder=(DecodeImageHandler *) ReadJPEGImage;
1535 entry->encoder=(EncodeImageHandler *) WriteJPEGImage;
1537 entry->magick=(IsImageFormatHandler *) IsJPEG;
1538 entry->adjoin=MagickFalse;
1539 entry->description=ConstantString(description);
1540 if (*version != '\0')
1541 entry->version=ConstantString(version);
1542 entry->mime_type=ConstantString("image/jpeg");
1543 entry->module=ConstantString("JPEG");
1544 (void) RegisterMagickInfo(entry);
1545 entry=SetMagickInfo("JPEG");
1546 #if (JPEG_LIB_VERSION < 80) && !defined(LIBJPEG_TURBO_VERSION)
1547 entry->thread_support=NoThreadSupport;
1549 #if defined(MAGICKCORE_JPEG_DELEGATE)
1550 entry->decoder=(DecodeImageHandler *) ReadJPEGImage;
1551 entry->encoder=(EncodeImageHandler *) WriteJPEGImage;
1553 entry->magick=(IsImageFormatHandler *) IsJPEG;
1554 entry->adjoin=MagickFalse;
1555 entry->description=ConstantString(description);
1556 if (*version != '\0')
1557 entry->version=ConstantString(version);
1558 entry->mime_type=ConstantString("image/jpeg");
1559 entry->module=ConstantString("JPEG");
1560 (void) RegisterMagickInfo(entry);
1561 entry=SetMagickInfo("JPG");
1562 #if (JPEG_LIB_VERSION < 80) && !defined(LIBJPEG_TURBO_VERSION)
1563 entry->thread_support=NoThreadSupport;
1565 #if defined(MAGICKCORE_JPEG_DELEGATE)
1566 entry->decoder=(DecodeImageHandler *) ReadJPEGImage;
1567 entry->encoder=(EncodeImageHandler *) WriteJPEGImage;
1569 entry->adjoin=MagickFalse;
1570 entry->description=ConstantString(description);
1571 if (*version != '\0')
1572 entry->version=ConstantString(version);
1573 entry->mime_type=ConstantString("image/jpeg");
1574 entry->module=ConstantString("JPEG");
1575 (void) RegisterMagickInfo(entry);
1576 entry=SetMagickInfo("JPS");
1577 #if (JPEG_LIB_VERSION < 80) && !defined(LIBJPEG_TURBO_VERSION)
1578 entry->thread_support=NoThreadSupport;
1580 #if defined(MAGICKCORE_JPEG_DELEGATE)
1581 entry->decoder=(DecodeImageHandler *) ReadJPEGImage;
1582 entry->encoder=(EncodeImageHandler *) WriteJPEGImage;
1584 entry->adjoin=MagickFalse;
1585 entry->description=ConstantString(description);
1586 if (*version != '\0')
1587 entry->version=ConstantString(version);
1588 entry->mime_type=ConstantString("image/jpeg");
1589 entry->module=ConstantString("JPEG");
1590 (void) RegisterMagickInfo(entry);
1591 entry=SetMagickInfo("PJPEG");
1592 #if (JPEG_LIB_VERSION < 80) && !defined(LIBJPEG_TURBO_VERSION)
1593 entry->thread_support=NoThreadSupport;
1595 #if defined(MAGICKCORE_JPEG_DELEGATE)
1596 entry->decoder=(DecodeImageHandler *) ReadJPEGImage;
1597 entry->encoder=(EncodeImageHandler *) WriteJPEGImage;
1599 entry->adjoin=MagickFalse;
1600 entry->description=ConstantString(description);
1601 if (*version != '\0')
1602 entry->version=ConstantString(version);
1603 entry->mime_type=ConstantString("image/jpeg");
1604 entry->module=ConstantString("JPEG");
1605 (void) RegisterMagickInfo(entry);
1606 return(MagickImageCoderSignature);
1611 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1615 % U n r e g i s t e r J P E G I m a g e %
1619 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1621 % UnregisterJPEGImage() removes format registrations made by the
1622 % JPEG module from the list of supported formats.
1624 % The format of the UnregisterJPEGImage method is:
1626 % UnregisterJPEGImage(void)
1629 ModuleExport void UnregisterJPEGImage(void)
1631 (void) UnregisterMagickInfo("PJPG");
1632 (void) UnregisterMagickInfo("JPS");
1633 (void) UnregisterMagickInfo("JPG");
1634 (void) UnregisterMagickInfo("JPEG");
1635 (void) UnregisterMagickInfo("JPE");
1639 #if defined(MAGICKCORE_JPEG_DELEGATE)
1641 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1645 % W r i t e J P E G I m a g e %
1649 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1651 % WriteJPEGImage() writes a JPEG image file and returns it. It
1652 % allocates the memory necessary for the new Image structure and returns a
1653 % pointer to the new image.
1655 % The format of the WriteJPEGImage method is:
1657 % MagickBooleanType WriteJPEGImage(const ImageInfo *image_info,
1658 % Image *image,ExceptionInfo *exception)
1660 % A description of each parameter follows:
1662 % o image_info: the image info.
1664 % o jpeg_image: The image.
1666 % o exception: return any errors or warnings in this structure.
1670 static QuantizationTable *DestroyQuantizationTable(QuantizationTable *table)
1672 assert(table != (QuantizationTable *) NULL);
1673 if (table->slot != (char *) NULL)
1674 table->slot=DestroyString(table->slot);
1675 if (table->description != (char *) NULL)
1676 table->description=DestroyString(table->description);
1677 if (table->levels != (unsigned int *) NULL)
1678 table->levels=(unsigned int *) RelinquishMagickMemory(table->levels);
1679 table=(QuantizationTable *) RelinquishMagickMemory(table);
1683 static boolean EmptyOutputBuffer(j_compress_ptr cinfo)
1688 destination=(DestinationManager *) cinfo->dest;
1689 destination->manager.free_in_buffer=(size_t) WriteBlob(destination->image,
1690 MaxBufferExtent,destination->buffer);
1691 if (destination->manager.free_in_buffer != MaxBufferExtent)
1692 ERREXIT(cinfo,JERR_FILE_WRITE);
1693 destination->manager.next_output_byte=destination->buffer;
1697 static QuantizationTable *GetQuantizationTable(const char *filename,
1698 const char *slot,ExceptionInfo *exception)
1726 *quantization_tables,
1729 (void) LogMagickEvent(ConfigureEvent,GetMagickModule(),
1730 "Loading quantization tables \"%s\" ...",filename);
1731 table=(QuantizationTable *) NULL;
1732 xml=FileToString(filename,~0UL,exception);
1733 if (xml == (char *) NULL)
1735 quantization_tables=NewXMLTree(xml,exception);
1736 if (quantization_tables == (XMLTreeInfo *) NULL)
1738 xml=DestroyString(xml);
1741 for (table_iterator=GetXMLTreeChild(quantization_tables,"table");
1742 table_iterator != (XMLTreeInfo *) NULL;
1743 table_iterator=GetNextXMLTreeTag(table_iterator))
1745 attribute=GetXMLTreeAttribute(table_iterator,"slot");
1746 if ((attribute != (char *) NULL) && (LocaleCompare(slot,attribute) == 0))
1748 attribute=GetXMLTreeAttribute(table_iterator,"alias");
1749 if ((attribute != (char *) NULL) && (LocaleCompare(slot,attribute) == 0))
1752 if (table_iterator == (XMLTreeInfo *) NULL)
1754 xml=DestroyString(xml);
1757 description=GetXMLTreeChild(table_iterator,"description");
1758 if (description == (XMLTreeInfo *) NULL)
1760 (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
1761 "XmlMissingElement", "<description>, slot \"%s\"",slot);
1762 quantization_tables=DestroyXMLTree(quantization_tables);
1763 xml=DestroyString(xml);
1766 levels=GetXMLTreeChild(table_iterator,"levels");
1767 if (levels == (XMLTreeInfo *) NULL)
1769 (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
1770 "XmlMissingElement", "<levels>, slot \"%s\"", slot);
1771 quantization_tables=DestroyXMLTree(quantization_tables);
1772 xml=DestroyString(xml);
1775 table=(QuantizationTable *) AcquireMagickMemory(sizeof(*table));
1776 if (table == (QuantizationTable *) NULL)
1777 ThrowFatalException(ResourceLimitFatalError,
1778 "UnableToAcquireQuantizationTable");
1779 table->slot=(char *) NULL;
1780 table->description=(char *) NULL;
1781 table->levels=(unsigned int *) NULL;
1782 attribute=GetXMLTreeAttribute(table_iterator,"slot");
1783 if (attribute != (char *) NULL)
1784 table->slot=ConstantString(attribute);
1785 content=GetXMLTreeContent(description);
1786 if (content != (char *) NULL)
1787 table->description=ConstantString(content);
1788 attribute=GetXMLTreeAttribute(levels,"width");
1789 if (attribute == (char *) NULL)
1791 (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
1792 "XmlMissingAttribute", "<levels width>, slot \"%s\"",slot);
1793 quantization_tables=DestroyXMLTree(quantization_tables);
1794 table=DestroyQuantizationTable(table);
1795 xml=DestroyString(xml);
1798 table->width=StringToUnsignedLong(attribute);
1799 if (table->width == 0)
1801 (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
1802 "XmlInvalidAttribute", "<levels width>, table \"%s\"",slot);
1803 quantization_tables=DestroyXMLTree(quantization_tables);
1804 table=DestroyQuantizationTable(table);
1805 xml=DestroyString(xml);
1808 attribute=GetXMLTreeAttribute(levels,"height");
1809 if (attribute == (char *) NULL)
1811 (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
1812 "XmlMissingAttribute", "<levels height>, table \"%s\"",slot);
1813 quantization_tables=DestroyXMLTree(quantization_tables);
1814 table=DestroyQuantizationTable(table);
1815 xml=DestroyString(xml);
1818 table->height=StringToUnsignedLong(attribute);
1819 if (table->height == 0)
1821 (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
1822 "XmlInvalidAttribute", "<levels height>, table \"%s\"",slot);
1823 quantization_tables=DestroyXMLTree(quantization_tables);
1824 table=DestroyQuantizationTable(table);
1825 xml=DestroyString(xml);
1828 attribute=GetXMLTreeAttribute(levels,"divisor");
1829 if (attribute == (char *) NULL)
1831 (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
1832 "XmlMissingAttribute", "<levels divisor>, table \"%s\"",slot);
1833 quantization_tables=DestroyXMLTree(quantization_tables);
1834 table=DestroyQuantizationTable(table);
1835 xml=DestroyString(xml);
1838 table->divisor=InterpretLocaleValue(attribute,(char **) NULL);
1839 if (table->divisor == 0.0)
1841 (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
1842 "XmlInvalidAttribute", "<levels divisor>, table \"%s\"",slot);
1843 quantization_tables=DestroyXMLTree(quantization_tables);
1844 table=DestroyQuantizationTable(table);
1845 xml=DestroyString(xml);
1848 content=GetXMLTreeContent(levels);
1849 if (content == (char *) NULL)
1851 (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
1852 "XmlMissingContent", "<levels>, table \"%s\"",slot);
1853 quantization_tables=DestroyXMLTree(quantization_tables);
1854 table=DestroyQuantizationTable(table);
1855 xml=DestroyString(xml);
1858 length=(size_t) table->width*table->height;
1861 table->levels=(unsigned int *) AcquireQuantumMemory(length,
1862 sizeof(*table->levels));
1863 if (table->levels == (unsigned int *) NULL)
1864 ThrowFatalException(ResourceLimitFatalError,
1865 "UnableToAcquireQuantizationTable");
1866 for (i=0; i < (ssize_t) (table->width*table->height); i++)
1868 table->levels[i]=(unsigned int) (InterpretLocaleValue(content,&p)/
1869 table->divisor+0.5);
1870 while (isspace((int) ((unsigned char) *p)) != 0)
1876 value=InterpretLocaleValue(content,&p);
1880 (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
1881 "XmlInvalidContent", "<level> too many values, table \"%s\"",slot);
1882 quantization_tables=DestroyXMLTree(quantization_tables);
1883 table=DestroyQuantizationTable(table);
1884 xml=DestroyString(xml);
1887 for (j=i; j < 64; j++)
1888 table->levels[j]=table->levels[j-1];
1889 quantization_tables=DestroyXMLTree(quantization_tables);
1890 xml=DestroyString(xml);
1894 static void InitializeDestination(j_compress_ptr cinfo)
1899 destination=(DestinationManager *) cinfo->dest;
1900 destination->buffer=(JOCTET *) (*cinfo->mem->alloc_small)
1901 ((j_common_ptr) cinfo,JPOOL_IMAGE,MaxBufferExtent*sizeof(JOCTET));
1902 destination->manager.next_output_byte=destination->buffer;
1903 destination->manager.free_in_buffer=MaxBufferExtent;
1906 static void TerminateDestination(j_compress_ptr cinfo)
1911 destination=(DestinationManager *) cinfo->dest;
1912 if ((MaxBufferExtent-(int) destination->manager.free_in_buffer) > 0)
1917 count=WriteBlob(destination->image,MaxBufferExtent-
1918 destination->manager.free_in_buffer,destination->buffer);
1919 if (count != (ssize_t)
1920 (MaxBufferExtent-destination->manager.free_in_buffer))
1921 ERREXIT(cinfo,JERR_FILE_WRITE);
1925 static void WriteProfile(j_compress_ptr jpeg_info,Image *image)
1947 Save image profile as a APP marker.
1950 custom_profile=AcquireStringInfo(65535L);
1951 ResetImageProfileIterator(image);
1952 for (name=GetNextImageProfile(image); name != (const char *) NULL; )
1954 register unsigned char
1957 profile=GetImageProfile(image,name);
1958 p=GetStringInfoDatum(custom_profile);
1959 if (LocaleCompare(name,"EXIF") == 0)
1960 for (i=0; i < (ssize_t) GetStringInfoLength(profile); i+=65533L)
1962 length=MagickMin(GetStringInfoLength(profile)-i,65533L);
1963 jpeg_write_marker(jpeg_info,XML_MARKER,GetStringInfoDatum(profile)+i,
1964 (unsigned int) length);
1966 if (LocaleCompare(name,"ICC") == 0)
1968 register unsigned char
1971 tag_length=strlen(ICC_PROFILE);
1972 p=GetStringInfoDatum(custom_profile);
1973 (void) CopyMagickMemory(p,ICC_PROFILE,tag_length);
1975 for (i=0; i < (ssize_t) GetStringInfoLength(profile); i+=65519L)
1977 length=MagickMin(GetStringInfoLength(profile)-i,65519L);
1978 p[12]=(unsigned char) ((i/65519L)+1);
1979 p[13]=(unsigned char) (GetStringInfoLength(profile)/65519L+1);
1980 (void) CopyMagickMemory(p+tag_length+3,GetStringInfoDatum(profile)+i,
1982 jpeg_write_marker(jpeg_info,ICC_MARKER,GetStringInfoDatum(
1983 custom_profile),(unsigned int) (length+tag_length+3));
1986 if (((LocaleCompare(name,"IPTC") == 0) ||
1987 (LocaleCompare(name,"8BIM") == 0)) && (iptc == MagickFalse))
1993 for (i=0; i < (ssize_t) GetStringInfoLength(profile); i+=65500L)
1995 length=MagickMin(GetStringInfoLength(profile)-i,65500L);
1996 roundup=(size_t) (length & 0x01);
1997 if (LocaleNCompare((char *) GetStringInfoDatum(profile),"8BIM",4) == 0)
1999 (void) memcpy(p,"Photoshop 3.0 ",14);
2004 (void) CopyMagickMemory(p,"Photoshop 3.0 8BIM\04\04\0\0\0\0",24);
2006 p[24]=(unsigned char) (length >> 8);
2007 p[25]=(unsigned char) (length & 0xff);
2010 (void) memcpy(p+tag_length,GetStringInfoDatum(profile)+i,length);
2012 p[length+tag_length]='\0';
2013 jpeg_write_marker(jpeg_info,IPTC_MARKER,GetStringInfoDatum(
2014 custom_profile),(unsigned int) (length+tag_length+roundup));
2017 if (LocaleCompare(name,"XMP") == 0)
2023 Add namespace to XMP profile.
2025 xmp_profile=StringToStringInfo("http://ns.adobe.com/xap/1.0/ ");
2026 if (xmp_profile != (StringInfo *) NULL)
2028 if (profile != (StringInfo *) NULL)
2029 ConcatenateStringInfo(xmp_profile,profile);
2030 GetStringInfoDatum(xmp_profile)[28]='\0';
2031 for (i=0; i < (ssize_t) GetStringInfoLength(xmp_profile); i+=65533L)
2033 length=MagickMin(GetStringInfoLength(xmp_profile)-i,65533L);
2034 jpeg_write_marker(jpeg_info,XML_MARKER,
2035 GetStringInfoDatum(xmp_profile)+i,(unsigned int) length);
2037 xmp_profile=DestroyStringInfo(xmp_profile);
2040 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2041 "%s profile: %.20g bytes",name,(double) GetStringInfoLength(profile));
2042 name=GetNextImageProfile(image);
2044 custom_profile=DestroyStringInfo(custom_profile);
2047 static void JPEGDestinationManager(j_compress_ptr cinfo,Image * image)
2052 cinfo->dest=(struct jpeg_destination_mgr *) (*cinfo->mem->alloc_small)
2053 ((j_common_ptr) cinfo,JPOOL_IMAGE,sizeof(DestinationManager));
2054 destination=(DestinationManager *) cinfo->dest;
2055 destination->manager.init_destination=InitializeDestination;
2056 destination->manager.empty_output_buffer=EmptyOutputBuffer;
2057 destination->manager.term_destination=TerminateDestination;
2058 destination->image=image;
2061 static char **SamplingFactorToList(const char *text)
2078 if (text == (char *) NULL)
2079 return((char **) NULL);
2081 Convert string to an ASCII list.
2084 for (p=text; *p != '\0'; p++)
2087 textlist=(char **) AcquireQuantumMemory((size_t) lines+MaxTextExtent,
2089 if (textlist == (char **) NULL)
2090 ThrowFatalException(ResourceLimitFatalError,"UnableToConvertText");
2092 for (i=0; i < (ssize_t) lines; i++)
2094 for (q=(char *) p; *q != '\0'; q++)
2097 textlist[i]=(char *) AcquireQuantumMemory((size_t) (q-p)+MaxTextExtent,
2098 sizeof(*textlist[i]));
2099 if (textlist[i] == (char *) NULL)
2100 ThrowFatalException(ResourceLimitFatalError,"UnableToConvertText");
2101 (void) CopyMagickString(textlist[i],p,(size_t) (q-p+1));
2106 textlist[i]=(char *) NULL;
2110 static MagickBooleanType WriteJPEGImage(const ImageInfo *image_info,
2111 Image *image,ExceptionInfo *exception)
2126 *volatile jpeg_pixels;
2146 struct jpeg_compress_struct
2149 struct jpeg_error_mgr
2158 assert(image_info != (const ImageInfo *) NULL);
2159 assert(image_info->signature == MagickSignature);
2160 assert(image != (Image *) NULL);
2161 assert(image->signature == MagickSignature);
2162 if (image->debug != MagickFalse)
2163 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2164 assert(exception != (ExceptionInfo *) NULL);
2165 assert(exception->signature == MagickSignature);
2166 if ((LocaleCompare(image_info->magick,"JPS") == 0) &&
2167 (image->next != (Image *) NULL))
2168 image=AppendImages(image,MagickFalse,exception);
2169 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
2170 if (status == MagickFalse)
2173 Initialize JPEG parameters.
2175 (void) ResetMagickMemory(&error_manager,0,sizeof(error_manager));
2176 (void) ResetMagickMemory(&jpeg_info,0,sizeof(jpeg_info));
2177 (void) ResetMagickMemory(&jpeg_error,0,sizeof(jpeg_error));
2178 jpeg_info.client_data=(void *) image;
2179 jpeg_info.err=jpeg_std_error(&jpeg_error);
2180 jpeg_info.err->emit_message=(void (*)(j_common_ptr,int)) JPEGWarningHandler;
2181 jpeg_info.err->error_exit=(void (*)(j_common_ptr)) JPEGErrorHandler;
2182 error_manager.exception=exception;
2183 error_manager.image=image;
2184 memory_info=(MemoryInfo *) NULL;
2185 if (setjmp(error_manager.error_recovery) != 0)
2187 jpeg_destroy_compress(&jpeg_info);
2188 (void) CloseBlob(image);
2189 return(MagickFalse);
2191 jpeg_info.client_data=(void *) &error_manager;
2192 jpeg_create_compress(&jpeg_info);
2193 JPEGDestinationManager(&jpeg_info,image);
2194 if ((image->columns != (unsigned int) image->columns) ||
2195 (image->rows != (unsigned int) image->rows))
2196 ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
2197 jpeg_info.image_width=(unsigned int) image->columns;
2198 jpeg_info.image_height=(unsigned int) image->rows;
2199 jpeg_info.input_components=3;
2200 jpeg_info.data_precision=8;
2201 jpeg_info.in_color_space=JCS_RGB;
2202 switch (image->colorspace)
2204 case CMYKColorspace:
2206 jpeg_info.input_components=4;
2207 jpeg_info.in_color_space=JCS_CMYK;
2210 case YCbCrColorspace:
2211 case Rec601YCbCrColorspace:
2212 case Rec709YCbCrColorspace:
2214 jpeg_info.in_color_space=JCS_YCbCr;
2217 case GRAYColorspace:
2219 if (image_info->type == TrueColorType)
2221 jpeg_info.input_components=1;
2222 jpeg_info.in_color_space=JCS_GRAYSCALE;
2227 (void) TransformImageColorspace(image,sRGBColorspace,exception);
2228 if (image_info->type == TrueColorType)
2230 if (IsImageGray(image,exception) != MagickFalse)
2232 jpeg_info.input_components=1;
2233 jpeg_info.in_color_space=JCS_GRAYSCALE;
2238 jpeg_set_defaults(&jpeg_info);
2239 if (jpeg_info.in_color_space == JCS_CMYK)
2240 jpeg_set_colorspace(&jpeg_info,JCS_YCCK);
2241 if ((jpeg_info.data_precision != 12) && (image->depth <= 8))
2242 jpeg_info.data_precision=8;
2244 jpeg_info.data_precision=BITS_IN_JSAMPLE;
2245 jpeg_info.density_unit=1;
2246 if (image->debug != MagickFalse)
2247 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2248 "Image resolution: %.20g,%.20g",floor(image->resolution.x+0.5),
2249 floor(image->resolution.y+0.5));
2250 if ((image->resolution.x != 0.0) && (image->resolution.y != 0.0))
2253 Set image resolution.
2255 jpeg_info.write_JFIF_header=TRUE;
2256 jpeg_info.X_density=(UINT16) floor(image->resolution.x+0.5);
2257 jpeg_info.Y_density=(UINT16) floor(image->resolution.y+0.5);
2259 Set image resolution units.
2261 jpeg_info.density_unit=(UINT8) 0;
2262 if (image->units == PixelsPerInchResolution)
2263 jpeg_info.density_unit=(UINT8) 1;
2264 if (image->units == PixelsPerCentimeterResolution)
2265 jpeg_info.density_unit=(UINT8) 2;
2267 jpeg_info.dct_method=JDCT_FLOAT;
2268 option=GetImageOption(image_info,"jpeg:dct-method");
2269 if (option != (const char *) NULL)
2275 if (LocaleCompare(option,"default") == 0)
2276 jpeg_info.dct_method=JDCT_DEFAULT;
2282 if (LocaleCompare(option,"fastest") == 0)
2283 jpeg_info.dct_method=JDCT_FASTEST;
2284 if (LocaleCompare(option,"float") == 0)
2285 jpeg_info.dct_method=JDCT_FLOAT;
2291 if (LocaleCompare(option,"ifast") == 0)
2292 jpeg_info.dct_method=JDCT_IFAST;
2293 if (LocaleCompare(option,"islow") == 0)
2294 jpeg_info.dct_method=JDCT_ISLOW;
2298 option=GetImageOption(image_info,"jpeg:optimize-coding");
2299 if (option != (const char *) NULL)
2300 jpeg_info.optimize_coding=IsStringTrue(option) != MagickFalse ? TRUE :
2307 length=(MagickSizeType) jpeg_info.input_components*image->columns*
2308 image->rows*sizeof(JSAMPLE);
2309 if (length == (MagickSizeType) ((size_t) length))
2312 Perform optimization only if available memory resources permit it.
2314 status=AcquireMagickResource(MemoryResource,length);
2315 RelinquishMagickResource(MemoryResource,length);
2316 jpeg_info.optimize_coding=status == MagickFalse ? FALSE : TRUE;
2319 #if (JPEG_LIB_VERSION >= 61) && defined(C_PROGRESSIVE_SUPPORTED)
2320 if ((LocaleCompare(image_info->magick,"PJPEG") == 0) ||
2321 (image_info->interlace != NoInterlace))
2323 if (image->debug != MagickFalse)
2324 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2325 "Interlace: progressive");
2326 jpeg_simple_progression(&jpeg_info);
2329 if (image->debug != MagickFalse)
2330 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2331 "Interlace: non-progressive");
2333 if (image->debug != MagickFalse)
2334 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2335 "Interlace: nonprogressive");
2338 if ((image_info->compression != LosslessJPEGCompression) &&
2339 (image->quality <= 100))
2341 if (image->quality != UndefinedCompressionQuality)
2342 quality=(int) image->quality;
2343 if (image->debug != MagickFalse)
2344 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Quality: %.20g",
2345 (double) image->quality);
2349 #if !defined(C_LOSSLESS_SUPPORTED)
2351 if (image->debug != MagickFalse)
2352 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Quality: 100");
2354 if (image->quality < 100)
2355 (void) ThrowMagickException(exception,GetMagickModule(),CoderWarning,
2356 "LosslessToLossyJPEGConversion",image->filename);
2363 predictor=image->quality/100; /* range 1-7 */
2364 point_transform=image->quality % 20; /* range 0-15 */
2365 jpeg_simple_lossless(&jpeg_info,predictor,point_transform);
2366 if (image->debug != MagickFalse)
2368 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2369 "Compression: lossless");
2370 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2371 "Predictor: %d",predictor);
2372 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2373 "Point Transform: %d",point_transform);
2378 option=GetImageOption(image_info,"jpeg:extent");
2379 if (option != (const char *) NULL)
2387 jpeg_info=CloneImageInfo(image_info);
2388 jpeg_info->blob=NULL;
2389 jpeg_image=CloneImage(image,0,0,MagickTrue,exception);
2390 if (jpeg_image != (Image *) NULL)
2400 Search for compression quality that does not exceed image extent.
2402 jpeg_info->quality=0;
2403 extent=(MagickSizeType) SiPrefixToDoubleInterval(option,100.0);
2404 (void) DeleteImageOption(jpeg_info,"jpeg:extent");
2405 (void) DeleteImageArtifact(jpeg_image,"jpeg:extent");
2407 for (minimum=2; minimum < maximum; )
2409 (void) AcquireUniqueFilename(jpeg_image->filename);
2410 jpeg_image->quality=minimum+(maximum-minimum+1)/2;
2411 status=WriteJPEGImage(jpeg_info,jpeg_image,exception);
2412 if (GetBlobSize(jpeg_image) <= extent)
2413 minimum=jpeg_image->quality+1;
2415 maximum=jpeg_image->quality-1;
2416 (void) RelinquishUniqueFileResource(jpeg_image->filename);
2418 quality=(int)minimum-1;
2419 jpeg_image=DestroyImage(jpeg_image);
2421 jpeg_info=DestroyImageInfo(jpeg_info);
2423 jpeg_set_quality(&jpeg_info,quality,TRUE);
2424 #if (JPEG_LIB_VERSION >= 70)
2425 option=GetImageOption(image_info,"quality");
2426 if (option != (const char *) NULL)
2435 Set quality scaling for luminance and chrominance separately.
2437 flags=ParseGeometry(option,&geometry_info);
2438 if (((flags & RhoValue) != 0) && ((flags & SigmaValue) != 0))
2440 jpeg_info.q_scale_factor[0]=jpeg_quality_scaling((int)
2441 (geometry_info.rho+0.5));
2442 jpeg_info.q_scale_factor[1]=jpeg_quality_scaling((int)
2443 (geometry_info.sigma+0.5));
2444 jpeg_default_qtables(&jpeg_info,TRUE);
2448 colorspace=jpeg_info.in_color_space;
2449 value=GetImageOption(image_info,"jpeg:colorspace");
2450 if (value == (char *) NULL)
2451 value=GetImageProperty(image,"jpeg:colorspace",exception);
2452 if (value != (char *) NULL)
2453 colorspace=StringToInteger(value);
2454 sampling_factor=(const char *) NULL;
2455 if (colorspace == jpeg_info.in_color_space)
2457 value=GetImageOption(image_info,"jpeg:sampling-factor");
2458 if (value == (char *) NULL)
2459 value=GetImageProperty(image,"jpeg:sampling-factor",exception);
2460 if (value != (char *) NULL)
2462 sampling_factor=value;
2463 if (image->debug != MagickFalse)
2464 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2465 " Input sampling-factors=%s",sampling_factor);
2468 value=GetImageOption(image_info,"jpeg:sampling-factor");
2469 if (image_info->sampling_factor != (char *) NULL)
2470 sampling_factor=image_info->sampling_factor;
2471 if (sampling_factor == (const char *) NULL)
2473 if (image->quality >= 90)
2474 for (i=0; i < MAX_COMPONENTS; i++)
2476 jpeg_info.comp_info[i].h_samp_factor=1;
2477 jpeg_info.comp_info[i].v_samp_factor=1;
2492 Set sampling factor.
2495 factors=SamplingFactorToList(sampling_factor);
2496 if (factors != (char **) NULL)
2498 for (i=0; i < MAX_COMPONENTS; i++)
2500 if (factors[i] == (char *) NULL)
2502 flags=ParseGeometry(factors[i],&geometry_info);
2503 if ((flags & SigmaValue) == 0)
2504 geometry_info.sigma=geometry_info.rho;
2505 jpeg_info.comp_info[i].h_samp_factor=(int) geometry_info.rho;
2506 jpeg_info.comp_info[i].v_samp_factor=(int) geometry_info.sigma;
2507 factors[i]=(char *) RelinquishMagickMemory(factors[i]);
2509 factors=(char **) RelinquishMagickMemory(factors);
2511 for ( ; i < MAX_COMPONENTS; i++)
2513 jpeg_info.comp_info[i].h_samp_factor=1;
2514 jpeg_info.comp_info[i].v_samp_factor=1;
2517 option=GetImageOption(image_info,"jpeg:q-table");
2518 if (option != (const char *) NULL)
2524 Custom quantization tables.
2526 table=GetQuantizationTable(option,"0",exception);
2527 if (table != (QuantizationTable *) NULL)
2529 for (i=0; i < MAX_COMPONENTS; i++)
2530 jpeg_info.comp_info[i].quant_tbl_no=0;
2531 jpeg_add_quant_table(&jpeg_info,0,table->levels,
2532 jpeg_quality_scaling(quality),0);
2533 table=DestroyQuantizationTable(table);
2535 table=GetQuantizationTable(option,"1",exception);
2536 if (table != (QuantizationTable *) NULL)
2538 for (i=1; i < MAX_COMPONENTS; i++)
2539 jpeg_info.comp_info[i].quant_tbl_no=1;
2540 jpeg_add_quant_table(&jpeg_info,1,table->levels,
2541 jpeg_quality_scaling(quality),0);
2542 table=DestroyQuantizationTable(table);
2544 table=GetQuantizationTable(option,"2",exception);
2545 if (table != (QuantizationTable *) NULL)
2547 for (i=2; i < MAX_COMPONENTS; i++)
2548 jpeg_info.comp_info[i].quant_tbl_no=2;
2549 jpeg_add_quant_table(&jpeg_info,2,table->levels,
2550 jpeg_quality_scaling(quality),0);
2551 table=DestroyQuantizationTable(table);
2553 table=GetQuantizationTable(option,"3",exception);
2554 if (table != (QuantizationTable *) NULL)
2556 for (i=3; i < MAX_COMPONENTS; i++)
2557 jpeg_info.comp_info[i].quant_tbl_no=3;
2558 jpeg_add_quant_table(&jpeg_info,3,table->levels,
2559 jpeg_quality_scaling(quality),0);
2560 table=DestroyQuantizationTable(table);
2563 jpeg_start_compress(&jpeg_info,TRUE);
2564 if (image->debug != MagickFalse)
2566 if (image->storage_class == PseudoClass)
2567 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2568 "Storage class: PseudoClass");
2570 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2571 "Storage class: DirectClass");
2572 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Depth: %.20g",
2573 (double) image->depth);
2574 if (image->colors != 0)
2575 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2576 "Number of colors: %.20g",(double) image->colors);
2578 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2579 "Number of colors: unspecified");
2580 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2581 "JPEG data precision: %d",(int) jpeg_info.data_precision);
2582 switch (image->colorspace)
2584 case CMYKColorspace:
2586 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2587 "Storage class: DirectClass");
2588 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2589 "Colorspace: CMYK");
2592 case YCbCrColorspace:
2593 case Rec601YCbCrColorspace:
2594 case Rec709YCbCrColorspace:
2596 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2597 "Colorspace: YCbCr");
2603 switch (image->colorspace)
2605 case CMYKColorspace:
2607 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2608 "Colorspace: CMYK");
2609 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2610 "Sampling factors: %dx%d,%dx%d,%dx%d,%dx%d",
2611 jpeg_info.comp_info[0].h_samp_factor,
2612 jpeg_info.comp_info[0].v_samp_factor,
2613 jpeg_info.comp_info[1].h_samp_factor,
2614 jpeg_info.comp_info[1].v_samp_factor,
2615 jpeg_info.comp_info[2].h_samp_factor,
2616 jpeg_info.comp_info[2].v_samp_factor,
2617 jpeg_info.comp_info[3].h_samp_factor,
2618 jpeg_info.comp_info[3].v_samp_factor);
2621 case GRAYColorspace:
2623 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2624 "Colorspace: GRAY");
2625 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2626 "Sampling factors: %dx%d",jpeg_info.comp_info[0].h_samp_factor,
2627 jpeg_info.comp_info[0].v_samp_factor);
2630 case sRGBColorspace:
2633 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2634 "Image colorspace is RGB");
2635 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2636 "Sampling factors: %dx%d,%dx%d,%dx%d",
2637 jpeg_info.comp_info[0].h_samp_factor,
2638 jpeg_info.comp_info[0].v_samp_factor,
2639 jpeg_info.comp_info[1].h_samp_factor,
2640 jpeg_info.comp_info[1].v_samp_factor,
2641 jpeg_info.comp_info[2].h_samp_factor,
2642 jpeg_info.comp_info[2].v_samp_factor);
2645 case YCbCrColorspace:
2646 case Rec601YCbCrColorspace:
2647 case Rec709YCbCrColorspace:
2649 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2650 "Colorspace: YCbCr");
2651 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2652 "Sampling factors: %dx%d,%dx%d,%dx%d",
2653 jpeg_info.comp_info[0].h_samp_factor,
2654 jpeg_info.comp_info[0].v_samp_factor,
2655 jpeg_info.comp_info[1].h_samp_factor,
2656 jpeg_info.comp_info[1].v_samp_factor,
2657 jpeg_info.comp_info[2].h_samp_factor,
2658 jpeg_info.comp_info[2].v_samp_factor);
2663 (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Colorspace: %d",
2665 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2666 "Sampling factors: %dx%d,%dx%d,%dx%d,%dx%d",
2667 jpeg_info.comp_info[0].h_samp_factor,
2668 jpeg_info.comp_info[0].v_samp_factor,
2669 jpeg_info.comp_info[1].h_samp_factor,
2670 jpeg_info.comp_info[1].v_samp_factor,
2671 jpeg_info.comp_info[2].h_samp_factor,
2672 jpeg_info.comp_info[2].v_samp_factor,
2673 jpeg_info.comp_info[3].h_samp_factor,
2674 jpeg_info.comp_info[3].v_samp_factor);
2680 Write JPEG profiles.
2682 value=GetImageProperty(image,"comment",exception);
2683 if (value != (char *) NULL)
2684 for (i=0; i < (ssize_t) strlen(value); i+=65533L)
2685 jpeg_write_marker(&jpeg_info,JPEG_COM,(unsigned char *) value+i,
2686 (unsigned int) MagickMin((size_t) strlen(value+i),65533L));
2687 if (image->profiles != (void *) NULL)
2688 WriteProfile(&jpeg_info,image);
2690 Convert MIFF to JPEG raster pixels.
2692 memory_info=AcquireVirtualMemory((size_t) image->columns,
2693 jpeg_info.input_components*sizeof(*jpeg_pixels));
2694 if (memory_info == (MemoryInfo *) NULL)
2695 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
2696 jpeg_pixels=(JSAMPLE *) GetVirtualMemoryBlob(memory_info);
2697 if (setjmp(error_manager.error_recovery) != 0)
2699 jpeg_destroy_compress(&jpeg_info);
2700 if (memory_info != (MemoryInfo *) NULL)
2701 memory_info=RelinquishVirtualMemory(memory_info);
2702 (void) CloseBlob(image);
2703 return(MagickFalse);
2705 scanline[0]=(JSAMPROW) jpeg_pixels;
2706 scale=65535U/GetQuantumRange(jpeg_info.data_precision);
2709 if (jpeg_info.data_precision <= 8)
2711 if ((jpeg_info.in_color_space == JCS_RGB) ||
2712 (jpeg_info.in_color_space == JCS_YCbCr))
2713 for (y=0; y < (ssize_t) image->rows; y++)
2715 register const Quantum
2721 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
2722 if (p == (const Quantum *) NULL)
2725 for (x=0; x < (ssize_t) image->columns; x++)
2727 *q++=(JSAMPLE) ScaleQuantumToChar(GetPixelRed(image,p));
2728 *q++=(JSAMPLE) ScaleQuantumToChar(GetPixelGreen(image,p));
2729 *q++=(JSAMPLE) ScaleQuantumToChar(GetPixelBlue(image,p));
2730 p+=GetPixelChannels(image);
2732 (void) jpeg_write_scanlines(&jpeg_info,scanline,1);
2733 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
2735 if (status == MagickFalse)
2739 if (jpeg_info.in_color_space == JCS_GRAYSCALE)
2740 for (y=0; y < (ssize_t) image->rows; y++)
2742 register const Quantum
2748 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
2749 if (p == (const Quantum *) NULL)
2752 for (x=0; x < (ssize_t) image->columns; x++)
2754 *q++=(JSAMPLE) ScaleQuantumToChar(ClampToQuantum(GetPixelLuma(
2756 p+=GetPixelChannels(image);
2758 (void) jpeg_write_scanlines(&jpeg_info,scanline,1);
2759 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
2761 if (status == MagickFalse)
2765 for (y=0; y < (ssize_t) image->rows; y++)
2767 register const Quantum
2773 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
2774 if (p == (const Quantum *) NULL)
2777 for (x=0; x < (ssize_t) image->columns; x++)
2780 Convert DirectClass packets to contiguous CMYK scanlines.
2782 *q++=(JSAMPLE) (ScaleQuantumToChar((Quantum) (QuantumRange-
2783 GetPixelCyan(image,p))));
2784 *q++=(JSAMPLE) (ScaleQuantumToChar((Quantum) (QuantumRange-
2785 GetPixelMagenta(image,p))));
2786 *q++=(JSAMPLE) (ScaleQuantumToChar((Quantum) (QuantumRange-
2787 GetPixelYellow(image,p))));
2788 *q++=(JSAMPLE) (ScaleQuantumToChar((Quantum) (QuantumRange-
2789 GetPixelBlack(image,p))));
2790 p+=GetPixelChannels(image);
2792 (void) jpeg_write_scanlines(&jpeg_info,scanline,1);
2793 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
2795 if (status == MagickFalse)
2800 if (jpeg_info.in_color_space == JCS_GRAYSCALE)
2801 for (y=0; y < (ssize_t) image->rows; y++)
2803 register const Quantum
2809 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
2810 if (p == (const Quantum *) NULL)
2813 for (x=0; x < (ssize_t) image->columns; x++)
2815 *q++=(JSAMPLE) (ScaleQuantumToShort(ClampToQuantum(GetPixelLuma(image,
2817 p+=GetPixelChannels(image);
2819 (void) jpeg_write_scanlines(&jpeg_info,scanline,1);
2820 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
2822 if (status == MagickFalse)
2826 if ((jpeg_info.in_color_space == JCS_RGB) ||
2827 (jpeg_info.in_color_space == JCS_YCbCr))
2828 for (y=0; y < (ssize_t) image->rows; y++)
2830 register const Quantum
2836 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
2837 if (p == (const Quantum *) NULL)
2840 for (x=0; x < (ssize_t) image->columns; x++)
2842 *q++=(JSAMPLE) (ScaleQuantumToShort(GetPixelRed(image,p))/scale);
2843 *q++=(JSAMPLE) (ScaleQuantumToShort(GetPixelGreen(image,p))/scale);
2844 *q++=(JSAMPLE) (ScaleQuantumToShort(GetPixelBlue(image,p))/scale);
2845 p+=GetPixelChannels(image);
2847 (void) jpeg_write_scanlines(&jpeg_info,scanline,1);
2848 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
2850 if (status == MagickFalse)
2854 for (y=0; y < (ssize_t) image->rows; y++)
2856 register const Quantum
2862 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
2863 if (p == (const Quantum *) NULL)
2866 for (x=0; x < (ssize_t) image->columns; x++)
2869 Convert DirectClass packets to contiguous CMYK scanlines.
2871 *q++=(JSAMPLE) (ScaleQuantumToShort(QuantumRange-GetPixelRed(
2873 *q++=(JSAMPLE) (ScaleQuantumToShort(QuantumRange-GetPixelGreen(
2875 *q++=(JSAMPLE) (ScaleQuantumToShort(QuantumRange-GetPixelBlue(
2877 *q++=(JSAMPLE) (ScaleQuantumToShort(QuantumRange-GetPixelBlack(
2879 p+=GetPixelChannels(image);
2881 (void) jpeg_write_scanlines(&jpeg_info,scanline,1);
2882 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
2884 if (status == MagickFalse)
2887 if (y == (ssize_t) image->rows)
2888 jpeg_finish_compress(&jpeg_info);
2890 Relinquish resources.
2892 jpeg_destroy_compress(&jpeg_info);
2893 memory_info=RelinquishVirtualMemory(memory_info);
2894 (void) CloseBlob(image);