% Read Text Caption. %
% %
% Software Design %
-% John Cristy %
+% Cristy %
% February 2002 %
% %
% %
-% Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization %
+% Copyright 1999-2014 ImageMagick Studio LLC, a non-profit organization %
% dedicated to making software imaging solutions freely available. %
% %
% You may not use this file except in compliance with the License. You may %
*/
#include "MagickCore/studio.h"
#include "MagickCore/annotate.h"
+#include "MagickCore/artifact.h"
#include "MagickCore/blob.h"
#include "MagickCore/blob-private.h"
#include "MagickCore/composite-private.h"
#include "MagickCore/string_.h"
#include "MagickCore/string-private.h"
#include "MagickCore/utility.h"
-#if defined(MAGICKCORE_PANGOFT2_DELEGATE)
-#include <pango/pango.h>
-#include <pango/pangoft2.h>
-#include <pango/pango-features.h>
-#endif
\f
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% o exception: return any errors or warnings in this structure.
%
*/
-#if defined(MAGICKCORE_PANGOFT2_DELEGATE)
-static void PangoSubstitute(FcPattern *pattern,void *context)
-{
- const char
- *option;
-
- option=(const char *) context;
- if (option == (const char *) NULL)
- return;
- FcPatternDel(pattern,FC_HINTING);
- FcPatternAddBool(pattern, FC_HINTING,LocaleCompare(option,"none") != 0);
- FcPatternDel(pattern,FC_AUTOHINT);
- FcPatternAddBool(pattern,FC_AUTOHINT,LocaleCompare(option,"auto") == 0);
-}
-
-static Image *ReadCAPTIONImage(const ImageInfo *image_info,
- ExceptionInfo *exception)
-{
- char
- *caption,
- *property;
-
- const char
- *option;
-
- DrawInfo
- *draw_info;
-
- FT_Bitmap
- *canvas;
-
- Image
- *image;
-
- PangoAlignment
- align;
-
- PangoContext
- *context;
-
- PangoFontDescription
- *description;
-
- PangoFontMap
- *fontmap;
-
- PangoGravity
- gravity;
-
- PangoLayout
- *layout;
-
- PangoRectangle
- extent;
-
- PixelInfo
- fill_color;
-
- RectangleInfo
- page;
-
- register Quantum
- *q;
-
- register unsigned char
- *p;
-
- ssize_t
- y;
-
- /*
- Initialize Image structure.
- */
- assert(image_info != (const ImageInfo *) NULL);
- assert(image_info->signature == MagickSignature);
- if (image_info->debug != MagickFalse)
- (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
- image_info->filename);
- assert(exception != (ExceptionInfo *) NULL);
- assert(exception->signature == MagickSignature);
- image=AcquireImage(image_info,exception);
- (void) ResetImagePage(image,"0x0+0+0");
- /*
- Get context.
- */
- fontmap=(PangoFontMap *) pango_ft2_font_map_new();
- pango_ft2_font_map_set_resolution((PangoFT2FontMap *) fontmap,
- image->resolution.x,image->resolution.y);
- option=GetImageOption(image_info,"caption:hinting");
- pango_ft2_font_map_set_default_substitute((PangoFT2FontMap *) fontmap,
- PangoSubstitute,(char *) option,NULL);
- context=pango_font_map_create_context(fontmap);
- option=GetImageOption(image_info,"caption:language");
- if (option != (const char *) NULL)
- pango_context_set_language(context,pango_language_from_string(option));
- draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
- pango_context_set_base_dir(context,draw_info->direction ==
- RightToLeftDirection ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR);
- switch (draw_info->gravity)
- {
- case NorthGravity: gravity=PANGO_GRAVITY_NORTH; break;
- case WestGravity: gravity=PANGO_GRAVITY_WEST; break;
- case EastGravity: gravity=PANGO_GRAVITY_EAST; break;
- case SouthGravity: gravity=PANGO_GRAVITY_SOUTH; break;
- default: gravity=PANGO_GRAVITY_AUTO; break;
- }
- pango_context_set_base_gravity(context,gravity);
- option=GetImageOption(image_info,"caption:gravity-hint");
- if (option != (const char *) NULL)
- {
- if (LocaleCompare(option,"line") == 0)
- pango_context_set_gravity_hint(context,PANGO_GRAVITY_HINT_LINE);
- if (LocaleCompare(option,"natural") == 0)
- pango_context_set_gravity_hint(context,PANGO_GRAVITY_HINT_NATURAL);
- if (LocaleCompare(option,"strong") == 0)
- pango_context_set_gravity_hint(context,PANGO_GRAVITY_HINT_STRONG);
- }
- /*
- Configure layout.
- */
- layout=pango_layout_new(context);
- option=GetImageOption(image_info,"caption:auto-dir");
- if (option != (const char *) NULL)
- pango_layout_set_auto_dir(layout,1);
- option=GetImageOption(image_info,"caption:ellipsize");
- if (option != (const char *) NULL)
- {
- if (LocaleCompare(option,"end") == 0)
- pango_layout_set_ellipsize(layout,PANGO_ELLIPSIZE_END);
- if (LocaleCompare(option,"middle") == 0)
- pango_layout_set_ellipsize(layout,PANGO_ELLIPSIZE_MIDDLE);
- if (LocaleCompare(option,"none") == 0)
- pango_layout_set_ellipsize(layout,PANGO_ELLIPSIZE_NONE);
- if (LocaleCompare(option,"start") == 0)
- pango_layout_set_ellipsize(layout,PANGO_ELLIPSIZE_START);
- }
- option=GetImageOption(image_info,"caption:justify");
- if ((option != (const char *) NULL) && (IsMagickTrue(option) != MagickFalse))
- pango_layout_set_justify(layout,1);
- option=GetImageOption(image_info,"caption:single-paragraph");
- if ((option != (const char *) NULL) && (IsMagickTrue(option) != MagickFalse))
- pango_layout_set_single_paragraph_mode(layout,1);
- option=GetImageOption(image_info,"caption:wrap");
- if (option != (const char *) NULL)
- {
- if (LocaleCompare(option,"char") == 0)
- pango_layout_set_wrap(layout,PANGO_WRAP_CHAR);
- if (LocaleCompare(option,"word") == 0)
- pango_layout_set_wrap(layout,PANGO_WRAP_WORD);
- if (LocaleCompare(option,"word-char") == 0)
- pango_layout_set_wrap(layout,PANGO_WRAP_WORD_CHAR);
- }
- option=GetImageOption(image_info,"caption:indent");
- if (option != (const char *) NULL)
- pango_layout_set_indent(layout,(StringToLong(option)*image->resolution.x*
- PANGO_SCALE+36)/72);
- switch (draw_info->align)
- {
- case CenterAlign: align=PANGO_ALIGN_CENTER; break;
- case RightAlign: align=PANGO_ALIGN_RIGHT; break;
- case LeftAlign:
- default: align=PANGO_ALIGN_LEFT; break;
- }
- if ((align != PANGO_ALIGN_CENTER) &&
- (draw_info->direction == RightToLeftDirection))
- align=(PangoAlignment) (PANGO_ALIGN_LEFT+PANGO_ALIGN_RIGHT-align);
- pango_layout_set_alignment(layout,align);
- description=pango_font_description_from_string(draw_info->font ==
- (char *) NULL ? "helvetica" : draw_info->font);
- pango_font_description_set_size(description,PANGO_SCALE*draw_info->pointsize);
- pango_layout_set_font_description(layout,description);
- pango_font_description_free(description);
- property=InterpretImageProperties(image_info,image,image_info->filename,
- exception);
- (void) SetImageProperty(image,"caption",property,exception);
- property=DestroyString(property);
- caption=ConstantString(GetImageProperty(image,"caption",exception));
- /*
- Render caption.
- */
- option=GetImageOption(image_info,"caption:markup");
- if ((option != (const char *) NULL) && (IsMagickTrue(option) != MagickFalse))
- pango_layout_set_markup(layout,caption,-1);
- else
- pango_layout_set_text(layout,caption,-1);
- pango_layout_context_changed(layout);
- page.x=0;
- page.y=0;
- if (image_info->page != (char *) NULL)
- (void) ParseAbsoluteGeometry(image_info->page,&page);
- if (image->columns == 0)
- {
- pango_layout_get_pixel_extents(layout,NULL,&extent);
- image->columns=extent.x+extent.width;
- }
- else
- {
- image->columns-=2*page.x;
- pango_layout_set_width(layout,(PANGO_SCALE*image->columns*
- image->resolution.x+36.0)/72.0);
- }
- if (image->rows == 0)
- {
- pango_layout_get_pixel_extents(layout,NULL,&extent);
- image->rows=extent.y+extent.height;
- }
- else
- {
- image->rows-=2*page.y;
- pango_layout_set_height(layout,(PANGO_SCALE*image->rows*
- image->resolution.y+36.0)/72.0);
- }
- /*
- Create canvas.
- */
- canvas=(FT_Bitmap *) AcquireMagickMemory(sizeof(*canvas));
- if (canvas == (FT_Bitmap *) NULL)
- {
- draw_info=DestroyDrawInfo(draw_info);
- ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
- }
- canvas->width=image->columns;
- canvas->pitch=(canvas->width+3) & ~3;
- canvas->rows=image->rows;
- canvas->buffer=(unsigned char *) AcquireQuantumMemory(canvas->pitch,
- canvas->rows*sizeof(*canvas->buffer));
- if (canvas->buffer == (unsigned char *) NULL)
- {
- draw_info=DestroyDrawInfo(draw_info);
- canvas=(FT_Bitmap *) RelinquishMagickMemory(canvas);
- ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
- }
- canvas->num_grays=256;
- canvas->pixel_mode=ft_pixel_mode_grays;
- ResetMagickMemory(canvas->buffer,0x00,canvas->pitch*canvas->rows);
- pango_ft2_render_layout(canvas,layout,0,0);
- /*
- Convert caption to image.
- */
- image->columns+=2*page.x;
- image->rows+=2*page.y;
- if (SetImageBackgroundColor(image,exception) == MagickFalse)
- {
- draw_info=DestroyDrawInfo(draw_info);
- canvas->buffer=(unsigned char *) RelinquishMagickMemory(canvas->buffer);
- canvas=(FT_Bitmap *) RelinquishMagickMemory(canvas);
- caption=DestroyString(caption);
- image=DestroyImageList(image);
- return((Image *) NULL);
- }
- GetPixelInfo(image,&fill_color);
- p=canvas->buffer;
- for (y=page.y; y < (ssize_t) (image->rows-page.y); y++)
- {
- register ssize_t
- x;
-
- q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
- if (q == (Quantum *) NULL)
- break;
- q+=page.x*GetPixelChannels(image);
- for (x=page.x; x < (ssize_t) (image->columns-page.x); x++)
- {
- MagickRealType
- fill_opacity;
-
- (void) GetFillColor(draw_info,x,y,&fill_color,exception);
- fill_opacity=(*p)*fill_color.alpha/canvas->num_grays;
- if (draw_info->text_antialias == MagickFalse)
- fill_opacity=fill_opacity >= 0.5 ? 1.0 : 0.0;
- CompositePixelOver(image,&fill_color,fill_opacity,q,
- GetPixelAlpha(image,q),q);
- p++;
- q+=GetPixelChannels(image);
- }
- for ( ; x < (ssize_t) ((canvas->width+3) & ~3); x++)
- p++;
- }
- /*
- Relinquish resources.
- */
- draw_info=DestroyDrawInfo(draw_info);
- canvas->buffer=(unsigned char *) RelinquishMagickMemory(canvas->buffer);
- canvas=(FT_Bitmap *) RelinquishMagickMemory(canvas);
- caption=DestroyString(caption);
- return(GetFirstImageInList(image));
-}
-#else
static Image *ReadCAPTIONImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
char
*caption,
geometry[MaxTextExtent],
- *property;
+ *property,
+ *text;
const char
- *gravity;
+ *gravity,
+ *option;
DrawInfo
*draw_info;
*image;
MagickBooleanType
+ split,
status;
register ssize_t
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
image=AcquireImage(image_info,exception);
- if (image->columns == 0)
- ThrowReaderException(OptionError,"MustSpecifyImageSize");
(void) ResetImagePage(image,"0x0+0+0");
/*
Format caption.
*/
- property=InterpretImageProperties(image_info,image,image_info->filename,
- exception);
+ option=GetImageOption(image_info,"filename");
+ if (option == (const char *) NULL)
+ property=InterpretImageProperties((ImageInfo *) image_info,image,
+ image_info->filename,exception);
+ else
+ if (LocaleNCompare(option,"caption:",8) == 0)
+ property=InterpretImageProperties((ImageInfo *) image_info,image,option+8,
+ exception);
+ else
+ property=InterpretImageProperties((ImageInfo *) image_info,image,option,
+ exception);
(void) SetImageProperty(image,"caption",property,exception);
property=DestroyString(property);
caption=ConstantString(GetImageProperty(image,"caption",exception));
if (gravity != (char *) NULL)
draw_info->gravity=(GravityType) ParseCommandOption(MagickGravityOptions,
MagickFalse,gravity);
- if ((*caption != '\0') && (image->rows != 0) &&
- (image_info->pointsize == 0.0))
+ split=MagickFalse;
+ if (image->columns == 0)
+ {
+ text=AcquireString(caption);
+ i=FormatMagickCaption(image,draw_info,split,&metrics,&text,
+ exception);
+ (void) CloneString(&draw_info->text,text);
+ text=DestroyString(text);
+ (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
+ -metrics.bounds.x1,metrics.ascent);
+ if (draw_info->gravity == UndefinedGravity)
+ (void) CloneString(&draw_info->geometry,geometry);
+ status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
+ width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
+ image->columns=width;
+ }
+ if (image->rows == 0)
+ {
+ split=MagickTrue;
+ text=AcquireString(caption);
+ i=FormatMagickCaption(image,draw_info,split,&metrics,&text,
+ exception);
+ (void) CloneString(&draw_info->text,text);
+ text=DestroyString(text);
+ (void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
+ -metrics.bounds.x1,metrics.ascent);
+ if (draw_info->gravity == UndefinedGravity)
+ (void) CloneString(&draw_info->geometry,geometry);
+ status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
+ image->rows=(size_t) ((i+1)*(metrics.ascent-metrics.descent+
+ draw_info->interline_spacing+draw_info->stroke_width)+0.5);
+ }
+ if (fabs(image_info->pointsize) < MagickEpsilon)
{
- char
- *text;
+ double
+ high,
+ low;
/*
- Scale text to fit bounding box.
+ Auto fit text into bounding box.
*/
- for ( ; ; )
+ for ( ; ; draw_info->pointsize*=2.0)
{
text=AcquireString(caption);
- i=FormatMagickCaption(image,draw_info,MagickFalse,&metrics,&text,
+ i=FormatMagickCaption(image,draw_info,split,&metrics,&text,
exception);
(void) CloneString(&draw_info->text,text);
text=DestroyString(text);
if (draw_info->gravity == UndefinedGravity)
(void) CloneString(&draw_info->geometry,geometry);
status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
- (void) status;
width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
- if ((width > (image->columns+1)) || (height > (image->rows+1)))
- break;
- draw_info->pointsize*=2.0;
+ if ((image->columns != 0) && (image->rows != 0))
+ {
+ if ((width >= image->columns) && (height >= image->rows))
+ break;
+ }
+ else
+ if (((image->columns != 0) && (width >= image->columns)) ||
+ ((image->rows != 0) && (height >= image->rows)))
+ break;
}
- draw_info->pointsize/=2.0;
- for ( ; ; )
+ high=draw_info->pointsize;
+ for (low=1.0; (high-low) > 0.5; )
{
+ draw_info->pointsize=(low+high)/2.0;
text=AcquireString(caption);
- i=FormatMagickCaption(image,draw_info,MagickFalse,&metrics,&text,
+ i=FormatMagickCaption(image,draw_info,split,&metrics,&text,
exception);
(void) CloneString(&draw_info->text,text);
text=DestroyString(text);
status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
width=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
- if ((width > (image->columns+1)) || (height > (image->rows+1)))
- break;
- draw_info->pointsize++;
+ if ((image->columns != 0) && (image->rows != 0))
+ {
+ if ((width < image->columns) && (height < image->rows))
+ low=draw_info->pointsize+0.5;
+ else
+ high=draw_info->pointsize-0.5;
+ }
+ else
+ if (((image->columns != 0) && (width < image->columns)) ||
+ ((image->rows != 0) && (height < image->rows)))
+ low=draw_info->pointsize+0.5;
+ else
+ high=draw_info->pointsize-0.5;
}
- draw_info->pointsize--;
+ draw_info->pointsize=(low+high)/2.0-0.5;
}
- i=FormatMagickCaption(image,draw_info,MagickTrue,&metrics,&caption,exception);
- if (image->rows == 0)
- image->rows=(size_t) ((i+1)*(metrics.ascent-metrics.descent+
- draw_info->interline_spacing+draw_info->stroke_width)+0.5);
- if (image->rows == 0)
- image->rows=(size_t) ((i+1)*draw_info->pointsize+
- draw_info->interline_spacing+draw_info->stroke_width+0.5);
+ (void) CloneString(&draw_info->text,caption);
+ i=FormatMagickCaption(image,draw_info,split,&metrics,&caption,exception);
if (SetImageBackgroundColor(image,exception) == MagickFalse)
{
image=DestroyImageList(image);
metrics.ascent+draw_info->stroke_width/2.0);
draw_info->geometry=AcquireString(geometry);
}
- (void) AnnotateImage(image,draw_info,exception);
+ status=AnnotateImage(image,draw_info,exception);
draw_info=DestroyDrawInfo(draw_info);
caption=DestroyString(caption);
+ if (status == MagickFalse)
+ {
+ image=DestroyImageList(image);
+ return((Image *) NULL);
+ }
return(GetFirstImageInList(image));
}
-#endif
\f
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
*/
ModuleExport size_t RegisterCAPTIONImage(void)
{
- char
- version[MaxTextExtent];
-
MagickInfo
*entry;
- *version='\0';
-#if defined(PANGO_VERSION_STRING)
- (void) FormatLocaleString(version,MaxTextExtent,"(Pangoft2 %s)",
- PANGO_VERSION_STRING);
-#endif
entry=SetMagickInfo("CAPTION");
entry->decoder=(DecodeImageHandler *) ReadCAPTIONImage;
entry->description=ConstantString("Caption");
- if (*version != '\0')
- entry->version=ConstantString(version);
entry->adjoin=MagickFalse;
entry->module=ConstantString("CAPTION");
(void) RegisterMagickInfo(entry);
projects / imagemagick / blobdiff