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gerrit-public.fairphone.software / platform / external / ImageMagick / a38b4564f00511a8a7b260d6f3aa929263c91c32 / . / MagickCore / annotate.c
blob: bff97f2ca906d8144bd0fad0fd44575519158381 [file] [log] [blame]
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% AAA N N N N OOO TTTTT AAA TTTTT EEEEE %
% A A NN N NN N O O T A A T E %
% AAAAA N N N N N N O O T AAAAA T EEE %
% A A N NN N NN O O T A A T E %
% A A N N N N OOO T A A T EEEEE %
% %
% %
% MagickCore Image Annotation Methods %
% %
% Software Design %
% Cristy %
% July 1992 %
% %
% %
% Copyright 1999-2016 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 %
% obtain a copy of the License at %
% %
% http://www.imagemagick.org/script/license.php %
% %
% Unless required by applicable law or agreed to in writing, software %
% distributed under the License is distributed on an "AS IS" BASIS, %
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
% See the License for the specific language governing permissions and %
% limitations under the License. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Digital Applications (www.digapp.com) contributed the stroked text algorithm.
% It was written by Leonard Rosenthol.
%
%
*/
/*
Include declarations.
*/
#include "MagickCore/studio.h"
#include "MagickCore/annotate.h"
#include "MagickCore/annotate-private.h"
#include "MagickCore/attribute.h"
#include "MagickCore/cache-view.h"
#include "MagickCore/channel.h"
#include "MagickCore/client.h"
#include "MagickCore/color.h"
#include "MagickCore/color-private.h"
#include "MagickCore/colorspace-private.h"
#include "MagickCore/composite.h"
#include "MagickCore/composite-private.h"
#include "MagickCore/constitute.h"
#include "MagickCore/draw.h"
#include "MagickCore/draw-private.h"
#include "MagickCore/enhance.h"
#include "MagickCore/exception.h"
#include "MagickCore/exception-private.h"
#include "MagickCore/gem.h"
#include "MagickCore/geometry.h"
#include "MagickCore/image-private.h"
#include "MagickCore/log.h"
#include "MagickCore/quantum.h"
#include "MagickCore/quantum-private.h"
#include "MagickCore/pixel-accessor.h"
#include "MagickCore/property.h"
#include "MagickCore/resource_.h"
#include "MagickCore/semaphore.h"
#include "MagickCore/statistic.h"
#include "MagickCore/string_.h"
#include "MagickCore/token-private.h"
#include "MagickCore/transform.h"
#include "MagickCore/type.h"
#include "MagickCore/utility.h"
#include "MagickCore/utility-private.h"
#include "MagickCore/xwindow.h"
#include "MagickCore/xwindow-private.h"
#if defined(MAGICKCORE_FREETYPE_DELEGATE)
#if defined(__MINGW32__) || defined(__MINGW64__)
# undef interface
#endif
#include <ft2build.h>
#if defined(FT_FREETYPE_H)
# include FT_FREETYPE_H
#else
# include <freetype/freetype.h>
#endif
#if defined(FT_GLYPH_H)
# include FT_GLYPH_H
#else
# include <freetype/ftglyph.h>
#endif
#if defined(FT_OUTLINE_H)
# include FT_OUTLINE_H
#else
# include <freetype/ftoutln.h>
#endif
#if defined(FT_BBOX_H)
# include FT_BBOX_H
#else
# include <freetype/ftbbox.h>
#endif /* defined(FT_BBOX_H) */
#endif
#if defined(MAGICKCORE_CTL_DELEGATE)
#include <raqm.h>
#else
typedef struct _raqm_glyph_info_t
{
int
index,
x_offset,
x_advance,
y_offset;
unsigned int
cluster;
} raqm_glyph_info_t;
typedef enum
{
RAQM_DIRECTION_DEFAULT,
RAQM_DIRECTION_RTL,
RAQM_DIRECTION_LTR
} raqm_direction_t;
#endif
/*
Annotate semaphores.
*/
static SemaphoreInfo
*annotate_semaphore = (SemaphoreInfo *) NULL;
/*
Forward declarations.
*/
static MagickBooleanType
RenderType(Image *,const DrawInfo *,const PointInfo *,TypeMetric *,
ExceptionInfo *),
RenderPostscript(Image *,const DrawInfo *,const PointInfo *,TypeMetric *,
ExceptionInfo *),
RenderFreetype(Image *,const DrawInfo *,const char *,const PointInfo *,
TypeMetric *,ExceptionInfo *),
RenderX11(Image *,const DrawInfo *,const PointInfo *,TypeMetric *,
ExceptionInfo *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ A n n o t a t e C o m p o n e n t G e n e s i s %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% AnnotateComponentGenesis() instantiates the annotate component.
%
% The format of the AnnotateComponentGenesis method is:
%
% MagickBooleanType AnnotateComponentGenesis(void)
%
*/
MagickPrivate MagickBooleanType AnnotateComponentGenesis(void)
{
if (annotate_semaphore == (SemaphoreInfo *) NULL)
annotate_semaphore=AcquireSemaphoreInfo();
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ A n n o t a t e C o m p o n e n t T e r m i n u s %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% AnnotateComponentTerminus() destroys the annotate component.
%
% The format of the AnnotateComponentTerminus method is:
%
% AnnotateComponentTerminus(void)
%
*/
MagickPrivate void AnnotateComponentTerminus(void)
{
if (annotate_semaphore == (SemaphoreInfo *) NULL)
ActivateSemaphoreInfo(&annotate_semaphore);
RelinquishSemaphoreInfo(&annotate_semaphore);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% A n n o t a t e I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% AnnotateImage() annotates an image with text. Optionally you can include
% any of the following bits of information about the image by embedding
% the appropriate special characters:
%
% \n newline
% \r carriage return
% < less-than character.
% > greater-than character.
% & ampersand character.
% %% a percent sign
% %b file size of image read in
% %c comment meta-data property
% %d directory component of path
% %e filename extension or suffix
% %f filename (including suffix)
% %g layer canvas page geometry (equivalent to "%Wx%H%X%Y")
% %h current image height in pixels
% %i image filename (note: becomes output filename for "info:")
% %k CALCULATED: number of unique colors
% %l label meta-data property
% %m image file format (file magic)
% %n number of images in current image sequence
% %o output filename (used for delegates)
% %p index of image in current image list
% %q quantum depth (compile-time constant)
% %r image class and colorspace
% %s scene number (from input unless re-assigned)
% %t filename without directory or extension (suffix)
% %u unique temporary filename (used for delegates)
% %w current width in pixels
% %x x resolution (density)
% %y y resolution (density)
% %z image depth (as read in unless modified, image save depth)
% %A image transparency channel enabled (true/false)
% %C image compression type
% %D image GIF dispose method
% %G original image size (%wx%h; before any resizes)
% %H page (canvas) height
% %M Magick filename (original file exactly as given, including read mods)
% %O page (canvas) offset ( = %X%Y )
% %P page (canvas) size ( = %Wx%H )
% %Q image compression quality ( 0 = default )
% %S ?? scenes ??
% %T image time delay (in centi-seconds)
% %U image resolution units
% %W page (canvas) width
% %X page (canvas) x offset (including sign)
% %Y page (canvas) y offset (including sign)
% %Z unique filename (used for delegates)
% %@ CALCULATED: trim bounding box (without actually trimming)
% %# CALCULATED: 'signature' hash of image values
%
% The format of the AnnotateImage method is:
%
% MagickBooleanType AnnotateImage(Image *image,DrawInfo *draw_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o draw_info: the draw info.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType AnnotateImage(Image *image,
const DrawInfo *draw_info,ExceptionInfo *exception)
{
char
primitive[MagickPathExtent],
**textlist;
DrawInfo
*annotate,
*annotate_info;
GeometryInfo
geometry_info;
MagickBooleanType
status;
PointInfo
offset;
RectangleInfo
geometry;
register ssize_t
i;
size_t
length;
TypeMetric
metrics;
size_t
height,
number_lines;
assert(image != (Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(draw_info != (DrawInfo *) NULL);
assert(draw_info->signature == MagickCoreSignature);
if (draw_info->text == (char *) NULL)
return(MagickFalse);
if (*draw_info->text == '\0')
return(MagickTrue);
textlist=StringToList(draw_info->text);
if (textlist == (char **) NULL)
return(MagickFalse);
length=strlen(textlist[0]);
for (i=1; textlist[i] != (char *) NULL; i++)
if (strlen(textlist[i]) > length)
length=strlen(textlist[i]);
number_lines=(size_t) i;
annotate=CloneDrawInfo((ImageInfo *) NULL,draw_info);
annotate_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
SetGeometry(image,&geometry);
SetGeometryInfo(&geometry_info);
if (annotate_info->geometry != (char *) NULL)
{
(void) ParsePageGeometry(image,annotate_info->geometry,&geometry,
exception);
(void) ParseGeometry(annotate_info->geometry,&geometry_info);
}
if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
return(MagickFalse);
if (IsGrayColorspace(image->colorspace) != MagickFalse)
(void) SetImageColorspace(image,sRGBColorspace,exception);
status=MagickTrue;
for (i=0; textlist[i] != (char *) NULL; i++)
{
/*
Position text relative to image.
*/
annotate_info->affine.tx=geometry_info.xi-image->page.x;
annotate_info->affine.ty=geometry_info.psi-image->page.y;
(void) CloneString(&annotate->text,textlist[i]);
(void) GetTypeMetrics(image,annotate,&metrics,exception);
height=(ssize_t) (metrics.ascent-metrics.descent+
draw_info->interline_spacing+0.5);
switch (annotate->gravity)
{
case UndefinedGravity:
default:
{
offset.x=annotate_info->affine.tx+i*annotate_info->affine.ry*height;
offset.y=annotate_info->affine.ty+i*annotate_info->affine.sy*height;
break;
}
case NorthWestGravity:
{
offset.x=(geometry.width == 0 ? -1.0 : 1.0)*annotate_info->affine.tx+i*
annotate_info->affine.ry*height+annotate_info->affine.ry*
(metrics.ascent+metrics.descent);
offset.y=(geometry.height == 0 ? -1.0 : 1.0)*annotate_info->affine.ty+i*
annotate_info->affine.sy*height+annotate_info->affine.sy*
metrics.ascent;
break;
}
case NorthGravity:
{
offset.x=(geometry.width == 0 ? -1.0 : 1.0)*annotate_info->affine.tx+
geometry.width/2.0+i*annotate_info->affine.ry*height-
annotate_info->affine.sx*(metrics.width+metrics.bounds.x1)/2.0+
annotate_info->affine.ry*(metrics.ascent+metrics.descent);
offset.y=(geometry.height == 0 ? -1.0 : 1.0)*annotate_info->affine.ty+i*
annotate_info->affine.sy*height+annotate_info->affine.sy*
metrics.ascent-annotate_info->affine.rx*(metrics.width-
metrics.bounds.x1)/2.0;
break;
}
case NorthEastGravity:
{
offset.x=(geometry.width == 0 ? 1.0 : -1.0)*annotate_info->affine.tx+
geometry.width+i*annotate_info->affine.ry*height-
annotate_info->affine.sx*(metrics.width+metrics.bounds.x1)+
annotate_info->affine.ry*(metrics.ascent+metrics.descent)-1.0;
offset.y=(geometry.height == 0 ? -1.0 : 1.0)*annotate_info->affine.ty+i*
annotate_info->affine.sy*height+annotate_info->affine.sy*
metrics.ascent-annotate_info->affine.rx*(metrics.width-
metrics.bounds.x1);
break;
}
case WestGravity:
{
offset.x=(geometry.width == 0 ? -1.0 : 1.0)*annotate_info->affine.tx+i*
annotate_info->affine.ry*height+annotate_info->affine.ry*
(metrics.ascent+metrics.descent-(number_lines-1.0)*height)/2.0;
offset.y=(geometry.height == 0 ? -1.0 : 1.0)*annotate_info->affine.ty+
geometry.height/2.0+i*annotate_info->affine.sy*height+
annotate_info->affine.sy*(metrics.ascent+metrics.descent-
(number_lines-1.0)*height)/2.0+metrics.descent/2.0;
break;
}
case CenterGravity:
{
offset.x=(geometry.width == 0 ? -1.0 : 1.0)*annotate_info->affine.tx+
geometry.width/2.0+i*annotate_info->affine.ry*height-
annotate_info->affine.sx*(metrics.width+metrics.bounds.x1)/2.0+
annotate_info->affine.ry*(metrics.ascent+metrics.descent-
(number_lines-1)*height)/2.0;
offset.y=(geometry.height == 0 ? -1.0 : 1.0)*annotate_info->affine.ty+
geometry.height/2.0+i*annotate_info->affine.sy*height-
annotate_info->affine.rx*(metrics.width+metrics.bounds.x1)/2.0+
annotate_info->affine.sy*(metrics.ascent+metrics.descent-
(number_lines-1.0)*height)/2.0;
break;
}
case EastGravity:
{
offset.x=(geometry.width == 0 ? 1.0 : -1.0)*annotate_info->affine.tx+
geometry.width+i*annotate_info->affine.ry*height-
annotate_info->affine.sx*(metrics.width+metrics.bounds.x1)+
annotate_info->affine.ry*(metrics.ascent+metrics.descent-
(number_lines-1.0)*height)/2.0-1.0;
offset.y=(geometry.height == 0 ? -1.0 : 1.0)*annotate_info->affine.ty+
geometry.height/2.0+i*annotate_info->affine.sy*height-
annotate_info->affine.rx*(metrics.width+metrics.bounds.x1)+
annotate_info->affine.sy*(metrics.ascent+metrics.descent-
(number_lines-1.0)*height)/2.0+metrics.descent/2.0;
break;
}
case SouthWestGravity:
{
offset.x=(geometry.width == 0 ? -1.0 : 1.0)*annotate_info->affine.tx+i*
annotate_info->affine.ry*height-annotate_info->affine.ry*
(number_lines-1.0)*height;
offset.y=(geometry.height == 0 ? 1.0 : -1.0)*annotate_info->affine.ty+
geometry.height+i*annotate_info->affine.sy*height-
annotate_info->affine.sy*(number_lines-1.0)*height+metrics.descent;
break;
}
case SouthGravity:
{
offset.x=(geometry.width == 0 ? -1.0 : 1.0)*annotate_info->affine.tx+
geometry.width/2.0+i*annotate_info->affine.ry*height-
annotate_info->affine.sx*(metrics.width+metrics.bounds.x1)/2.0-
annotate_info->affine.ry*(number_lines-1.0)*height/2.0;
offset.y=(geometry.height == 0 ? 1.0 : -1.0)*annotate_info->affine.ty+
geometry.height+i*annotate_info->affine.sy*height-
annotate_info->affine.rx*(metrics.width+metrics.bounds.x1)/2.0-
annotate_info->affine.sy*(number_lines-1.0)*height+metrics.descent;
break;
}
case SouthEastGravity:
{
offset.x=(geometry.width == 0 ? 1.0 : -1.0)*annotate_info->affine.tx+
geometry.width+i*annotate_info->affine.ry*height-
annotate_info->affine.sx*(metrics.width+metrics.bounds.x1)-
annotate_info->affine.ry*(number_lines-1.0)*height-1.0;
offset.y=(geometry.height == 0 ? 1.0 : -1.0)*annotate_info->affine.ty+
geometry.height+i*annotate_info->affine.sy*height-
annotate_info->affine.rx*(metrics.width+metrics.bounds.x1)-
annotate_info->affine.sy*(number_lines-1.0)*height+metrics.descent;
break;
}
}
switch (annotate->align)
{
case LeftAlign:
{
offset.x=annotate_info->affine.tx+i*annotate_info->affine.ry*height;
offset.y=annotate_info->affine.ty+i*annotate_info->affine.sy*height;
break;
}
case CenterAlign:
{
offset.x=annotate_info->affine.tx+i*annotate_info->affine.ry*height-
annotate_info->affine.sx*(metrics.width+metrics.bounds.x1)/2.0;
offset.y=annotate_info->affine.ty+i*annotate_info->affine.sy*height-
annotate_info->affine.rx*(metrics.width+metrics.bounds.x1)/2.0;
break;
}
case RightAlign:
{
offset.x=annotate_info->affine.tx+i*annotate_info->affine.ry*height-
annotate_info->affine.sx*(metrics.width+metrics.bounds.x1);
offset.y=annotate_info->affine.ty+i*annotate_info->affine.sy*height-
annotate_info->affine.rx*(metrics.width+metrics.bounds.x1);
break;
}
default:
break;
}
if (draw_info->undercolor.alpha != TransparentAlpha)
{
DrawInfo
*undercolor_info;
/*
Text box.
*/
undercolor_info=CloneDrawInfo((ImageInfo *) NULL,(DrawInfo *) NULL);
undercolor_info->fill=draw_info->undercolor;
undercolor_info->affine=draw_info->affine;
undercolor_info->affine.tx=offset.x-draw_info->affine.ry*metrics.ascent;
undercolor_info->affine.ty=offset.y-draw_info->affine.sy*metrics.ascent;
(void) FormatLocaleString(primitive,MagickPathExtent,
"rectangle 0.0,0.0 %g,%g",metrics.origin.x,(double) height);
(void) CloneString(&undercolor_info->primitive,primitive);
(void) DrawImage(image,undercolor_info,exception);
(void) DestroyDrawInfo(undercolor_info);
}
annotate_info->affine.tx=offset.x;
annotate_info->affine.ty=offset.y;
(void) FormatLocaleString(primitive,MagickPathExtent,"stroke-width %g "
"line 0,0 %g,0",metrics.underline_thickness,metrics.width);
if (annotate->decorate == OverlineDecoration)
{
annotate_info->affine.ty-=(draw_info->affine.sy*(metrics.ascent+
metrics.descent-metrics.underline_position));
(void) CloneString(&annotate_info->primitive,primitive);
(void) DrawImage(image,annotate_info,exception);
}
else
if (annotate->decorate == UnderlineDecoration)
{
annotate_info->affine.ty-=(draw_info->affine.sy*
metrics.underline_position);
(void) CloneString(&annotate_info->primitive,primitive);
(void) DrawImage(image,annotate_info,exception);
}
/*
Annotate image with text.
*/
status=RenderType(image,annotate,&offset,&metrics,exception);
if (status == MagickFalse)
break;
if (annotate->decorate == LineThroughDecoration)
{
annotate_info->affine.ty-=(draw_info->affine.sy*(height+
metrics.underline_position+metrics.descent)/2.0);
(void) CloneString(&annotate_info->primitive,primitive);
(void) DrawImage(image,annotate_info,exception);
}
}
/*
Relinquish resources.
*/
annotate_info=DestroyDrawInfo(annotate_info);
annotate=DestroyDrawInfo(annotate);
for (i=0; textlist[i] != (char *) NULL; i++)
textlist[i]=DestroyString(textlist[i]);
textlist=(char **) RelinquishMagickMemory(textlist);
return(status);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% F o r m a t M a g i c k C a p t i o n %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% FormatMagickCaption() formats a caption so that it fits within the image
% width. It returns the number of lines in the formatted caption.
%
% The format of the FormatMagickCaption method is:
%
% ssize_t FormatMagickCaption(Image *image,DrawInfo *draw_info,
% const MagickBooleanType split,TypeMetric *metrics,char **caption,
% ExceptionInfo *exception)
%
% A description of each parameter follows.
%
% o image: The image.
%
% o draw_info: the draw info.
%
% o split: when no convenient line breaks-- insert newline.
%
% o metrics: Return the font metrics in this structure.
%
% o caption: the caption.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport ssize_t FormatMagickCaption(Image *image,DrawInfo *draw_info,
const MagickBooleanType split,TypeMetric *metrics,char **caption,
ExceptionInfo *exception)
{
char
*text;
MagickBooleanType
status;
register char
*p,
*q,
*s;
register ssize_t
i;
size_t
width;
ssize_t
n;
text=AcquireString(draw_info->text);
q=draw_info->text;
s=(char *) NULL;
for (p=(*caption); GetUTFCode(p) != 0; p+=GetUTFOctets(p))
{
if (IsUTFSpace(GetUTFCode(p)) != MagickFalse)
s=p;
if (GetUTFCode(p) == '\n')
q=draw_info->text;
for (i=0; i < (ssize_t) GetUTFOctets(p); i++)
*q++=(*(p+i));
*q='\0';
status=GetTypeMetrics(image,draw_info,metrics,exception);
if (status == MagickFalse)
break;
width=(size_t) floor(metrics->width+draw_info->stroke_width+0.5);
if ((width <= image->columns) || (strcmp(text,draw_info->text) == 0))
continue;
(void) strcpy(text,draw_info->text);
if ((s != (char *) NULL) && (GetUTFOctets(s) == 1))
{
*s='\n';
p=s;
}
else
if ((s != (char *) NULL) || (split != MagickFalse))
{
char
*target;
/*
No convenient line breaks-- insert newline.
*/
target=AcquireString(*caption);
n=p-(*caption);
CopyMagickString(target,*caption,n+1);
ConcatenateMagickString(target,"\n",strlen(*caption)+1);
ConcatenateMagickString(target,p,strlen(*caption)+2);
(void) DestroyString(*caption);
*caption=target;
p=(*caption)+n;
}
q=draw_info->text;
s=(char *) NULL;
}
text=DestroyString(text);
n=0;
for (p=(*caption); GetUTFCode(p) != 0; p+=GetUTFOctets(p))
if (GetUTFCode(p) == '\n')
n++;
return(n);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t M u l t i l i n e T y p e M e t r i c s %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetMultilineTypeMetrics() returns the following information for the
% specified font and text:
%
% character width
% character height
% ascender
% descender
% text width
% text height
% maximum horizontal advance
% bounds: x1
% bounds: y1
% bounds: x2
% bounds: y2
% origin: x
% origin: y
% underline position
% underline thickness
%
% This method is like GetTypeMetrics() but it returns the maximum text width
% and height for multiple lines of text.
%
% The format of the GetMultilineTypeMetrics method is:
%
% MagickBooleanType GetMultilineTypeMetrics(Image *image,
% const DrawInfo *draw_info,TypeMetric *metrics,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o draw_info: the draw info.
%
% o metrics: Return the font metrics in this structure.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType GetMultilineTypeMetrics(Image *image,
const DrawInfo *draw_info,TypeMetric *metrics,ExceptionInfo *exception)
{
char
**textlist;
DrawInfo
*annotate_info;
MagickBooleanType
status;
register ssize_t
i;
TypeMetric
extent;
assert(image != (Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(draw_info != (DrawInfo *) NULL);
assert(draw_info->text != (char *) NULL);
assert(draw_info->signature == MagickCoreSignature);
if (*draw_info->text == '\0')
return(MagickFalse);
annotate_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
annotate_info->text=DestroyString(annotate_info->text);
/*
Convert newlines to multiple lines of text.
*/
textlist=StringToList(draw_info->text);
if (textlist == (char **) NULL)
return(MagickFalse);
annotate_info->render=MagickFalse;
annotate_info->direction=UndefinedDirection;
(void) ResetMagickMemory(metrics,0,sizeof(*metrics));
(void) ResetMagickMemory(&extent,0,sizeof(extent));
/*
Find the widest of the text lines.
*/
annotate_info->text=textlist[0];
status=GetTypeMetrics(image,annotate_info,&extent,exception);
*metrics=extent;
for (i=1; textlist[i] != (char *) NULL; i++)
{
annotate_info->text=textlist[i];
status=GetTypeMetrics(image,annotate_info,&extent,exception);
if (extent.width > metrics->width)
*metrics=extent;
}
metrics->height=(double) (i*(size_t) (metrics->ascent-metrics->descent+0.5)+
(i-1)*draw_info->interline_spacing);
/*
Relinquish resources.
*/
annotate_info->text=(char *) NULL;
annotate_info=DestroyDrawInfo(annotate_info);
for (i=0; textlist[i] != (char *) NULL; i++)
textlist[i]=DestroyString(textlist[i]);
textlist=(char **) RelinquishMagickMemory(textlist);
return(status);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t T y p e M e t r i c s %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetTypeMetrics() returns the following information for the specified font
% and text:
%
% character width
% character height
% ascender
% descender
% text width
% text height
% maximum horizontal advance
% bounds: x1
% bounds: y1
% bounds: x2
% bounds: y2
% origin: x
% origin: y
% underline position
% underline thickness
%
% The format of the GetTypeMetrics method is:
%
% MagickBooleanType GetTypeMetrics(Image *image,const DrawInfo *draw_info,
% TypeMetric *metrics,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o draw_info: the draw info.
%
% o metrics: Return the font metrics in this structure.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType GetTypeMetrics(Image *image,
const DrawInfo *draw_info,TypeMetric *metrics,ExceptionInfo *exception)
{
DrawInfo
*annotate_info;
MagickBooleanType
status;
PointInfo
offset;
assert(image != (Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(draw_info != (DrawInfo *) NULL);
assert(draw_info->text != (char *) NULL);
assert(draw_info->signature == MagickCoreSignature);
annotate_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
annotate_info->render=MagickFalse;
annotate_info->direction=UndefinedDirection;
(void) ResetMagickMemory(metrics,0,sizeof(*metrics));
offset.x=0.0;
offset.y=0.0;
status=RenderType(image,annotate_info,&offset,metrics,exception);
if (image->debug != MagickFalse)
(void) LogMagickEvent(AnnotateEvent,GetMagickModule(),"Metrics: text: %s; "
"width: %g; height: %g; ascent: %g; descent: %g; max advance: %g; "
"bounds: %g,%g %g,%g; origin: %g,%g; pixels per em: %g,%g; "
"underline position: %g; underline thickness: %g",annotate_info->text,
metrics->width,metrics->height,metrics->ascent,metrics->descent,
metrics->max_advance,metrics->bounds.x1,metrics->bounds.y1,
metrics->bounds.x2,metrics->bounds.y2,metrics->origin.x,metrics->origin.y,
metrics->pixels_per_em.x,metrics->pixels_per_em.y,
metrics->underline_position,metrics->underline_thickness);
annotate_info=DestroyDrawInfo(annotate_info);
return(status);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e n d e r T y p e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RenderType() renders text on the image. It also returns the bounding box of
% the text relative to the image.
%
% The format of the RenderType method is:
%
% MagickBooleanType RenderType(Image *image,DrawInfo *draw_info,
% const PointInfo *offset,TypeMetric *metrics,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o draw_info: the draw info.
%
% o offset: (x,y) location of text relative to image.
%
% o metrics: bounding box of text.
%
% o exception: return any errors or warnings in this structure.
%
*/
static MagickBooleanType RenderType(Image *image,const DrawInfo *draw_info,
const PointInfo *offset,TypeMetric *metrics,ExceptionInfo *exception)
{
const TypeInfo
*type_info;
DrawInfo
*annotate_info;
MagickBooleanType
status;
type_info=(const TypeInfo *) NULL;
if (draw_info->font != (char *) NULL)
{
if (*draw_info->font == '@')
{
status=RenderFreetype(image,draw_info,draw_info->encoding,offset,
metrics,exception);
return(status);
}
if (*draw_info->font == '-')
return(RenderX11(image,draw_info,offset,metrics,exception));
if (IsPathAccessible(draw_info->font) != MagickFalse)
{
status=RenderFreetype(image,draw_info,draw_info->encoding,offset,
metrics,exception);
return(status);
}
type_info=GetTypeInfo(draw_info->font,exception);
if (type_info == (const TypeInfo *) NULL)
(void) ThrowMagickException(exception,GetMagickModule(),TypeWarning,
"UnableToReadFont","`%s'",draw_info->font);
}
if ((type_info == (const TypeInfo *) NULL) &&
(draw_info->family != (const char *) NULL))
{
type_info=GetTypeInfoByFamily(draw_info->family,draw_info->style,
draw_info->stretch,draw_info->weight,exception);
if (type_info == (const TypeInfo *) NULL)
(void) ThrowMagickException(exception,GetMagickModule(),TypeWarning,
"UnableToReadFont","`%s'",draw_info->family);
}
if (type_info == (const TypeInfo *) NULL)
type_info=GetTypeInfoByFamily("Arial",draw_info->style,
draw_info->stretch,draw_info->weight,exception);
if (type_info == (const TypeInfo *) NULL)
type_info=GetTypeInfoByFamily("Helvetica",draw_info->style,
draw_info->stretch,draw_info->weight,exception);
if (type_info == (const TypeInfo *) NULL)
type_info=GetTypeInfoByFamily("Century Schoolbook",draw_info->style,
draw_info->stretch,draw_info->weight,exception);
if (type_info == (const TypeInfo *) NULL)
type_info=GetTypeInfoByFamily("Sans",draw_info->style,
draw_info->stretch,draw_info->weight,exception);
if (type_info == (const TypeInfo *) NULL)
type_info=GetTypeInfoByFamily((const char *) NULL,draw_info->style,
draw_info->stretch,draw_info->weight,exception);
if (type_info == (const TypeInfo *) NULL)
type_info=GetTypeInfo("*",exception);
if (type_info == (const TypeInfo *) NULL)
{
status=RenderFreetype(image,draw_info,draw_info->encoding,offset,metrics,
exception);
return(status);
}
annotate_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
annotate_info->face=type_info->face;
if (type_info->metrics != (char *) NULL)
(void) CloneString(&annotate_info->metrics,type_info->metrics);
if (type_info->glyphs != (char *) NULL)
(void) CloneString(&annotate_info->font,type_info->glyphs);
status=RenderFreetype(image,annotate_info,type_info->encoding,offset,metrics,
exception);
annotate_info=DestroyDrawInfo(annotate_info);
return(status);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e n d e r F r e e t y p e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RenderFreetype() renders text on the image with a Truetype font. It also
% returns the bounding box of the text relative to the image.
%
% The format of the RenderFreetype method is:
%
% MagickBooleanType RenderFreetype(Image *image,DrawInfo *draw_info,
% const char *encoding,const PointInfo *offset,TypeMetric *metrics,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o draw_info: the draw info.
%
% o encoding: the font encoding.
%
% o offset: (x,y) location of text relative to image.
%
% o metrics: bounding box of text.
%
% o exception: return any errors or warnings in this structure.
%
*/
#if defined(MAGICKCORE_FREETYPE_DELEGATE)
static size_t ComplexTextLayout(const char *text,const size_t length,
const FT_Face face,const raqm_direction_t direction,const FT_Int32 flags,
raqm_glyph_info_t **grapheme)
{
#if defined(MAGICKCORE_CTL_DELEGATE)
return(raqm_shape(text,length,face,direction,&grapheme));
#else
FT_Error
ft_status;
register ssize_t
i;
ssize_t
last_glyph;
/*
Simple layout for bi-direction text (right-to-left or left-to-right).
*/
*grapheme=(raqm_glyph_info_t *) AcquireQuantumMemory(length+1,
sizeof(**grapheme));
if (*grapheme == (raqm_glyph_info_t *) NULL)
return(0);
last_glyph=0;
for (i=0; GetUTFCode(text) != 0; text+=GetUTFOctets(text), i++)
{
(*grapheme)[i].index=FT_Get_Char_Index(face,GetUTFCode(text));
(*grapheme)[i].x_offset=0;
(*grapheme)[i].y_offset=0;
if (((*grapheme)[i].index != 0) && (last_glyph != 0))
{
if (FT_HAS_KERNING(face))
{
FT_Vector
kerning;
ft_status=FT_Get_Kerning(face,last_glyph,(*grapheme)[i].index,
ft_kerning_default,&kerning);
if (ft_status == 0)
(*grapheme)[i-1].x_advance+=(FT_Pos) ((direction ==
RAQM_DIRECTION_RTL ? -1.0 : 1.0)*kerning.x);
}
}
ft_status=FT_Load_Glyph(face,(*grapheme)[i].index,flags);
(*grapheme)[i].x_advance=face->glyph->advance.x;
(*grapheme)[i].cluster=GetUTFCode(text);
last_glyph=(*grapheme)[i].index;
}
return((size_t) i);
#endif
}
static int TraceCubicBezier(FT_Vector *p,FT_Vector *q,FT_Vector *to,
DrawInfo *draw_info)
{
AffineMatrix
affine;
char
path[MagickPathExtent];
affine=draw_info->affine;
(void) FormatLocaleString(path,MagickPathExtent,"C%g,%g %g,%g %g,%g",
affine.tx+p->x/64.0,affine.ty-p->y/64.0,affine.tx+q->x/64.0,affine.ty-
q->y/64.0,affine.tx+to->x/64.0,affine.ty-to->y/64.0);
(void) ConcatenateString(&draw_info->primitive,path);
return(0);
}
static int TraceLineTo(FT_Vector *to,DrawInfo *draw_info)
{
AffineMatrix
affine;
char
path[MagickPathExtent];
affine=draw_info->affine;
(void) FormatLocaleString(path,MagickPathExtent,"L%g,%g",affine.tx+to->x/64.0,
affine.ty-to->y/64.0);
(void) ConcatenateString(&draw_info->primitive,path);
return(0);
}
static int TraceMoveTo(FT_Vector *to,DrawInfo *draw_info)
{
AffineMatrix
affine;
char
path[MagickPathExtent];
affine=draw_info->affine;
(void) FormatLocaleString(path,MagickPathExtent,"M%g,%g",affine.tx+to->x/64.0,
affine.ty-to->y/64.0);
(void) ConcatenateString(&draw_info->primitive,path);
return(0);
}
static int TraceQuadraticBezier(FT_Vector *control,FT_Vector *to,
DrawInfo *draw_info)
{
AffineMatrix
affine;
char
path[MagickPathExtent];
affine=draw_info->affine;
(void) FormatLocaleString(path,MagickPathExtent,"Q%g,%g %g,%g",affine.tx+
control->x/64.0,affine.ty-control->y/64.0,affine.tx+to->x/64.0,affine.ty-
to->y/64.0);
(void) ConcatenateString(&draw_info->primitive,path);
return(0);
}
static MagickBooleanType RenderFreetype(Image *image,const DrawInfo *draw_info,
const char *encoding,const PointInfo *offset,TypeMetric *metrics,
ExceptionInfo *exception)
{
#if !defined(FT_OPEN_PATHNAME)
#define FT_OPEN_PATHNAME ft_open_pathname
#endif
typedef struct _GlyphInfo
{
FT_UInt
id;
FT_Vector
origin;
FT_Glyph
image;
} GlyphInfo;
const char
*value;
DrawInfo
*annotate_info;
FT_BBox
bounds;
FT_BitmapGlyph
bitmap;
FT_Encoding
encoding_type;
FT_Error
ft_status;
FT_Face
face;
FT_Int32
flags;
FT_Library
library;
FT_Matrix
affine;
FT_Open_Args
args;
FT_Vector
origin;
GlyphInfo
glyph,
last_glyph;
MagickBooleanType
status;
PointInfo
point,
resolution;
raqm_direction_t
direction;
raqm_glyph_info_t
*grapheme;
register char
*p;
register ssize_t
i;
size_t
length;
ssize_t
code,
y;
static FT_Outline_Funcs
OutlineMethods =
{
(FT_Outline_MoveTo_Func) TraceMoveTo,
(FT_Outline_LineTo_Func) TraceLineTo,
(FT_Outline_ConicTo_Func) TraceQuadraticBezier,
(FT_Outline_CubicTo_Func) TraceCubicBezier,
0, 0
};
unsigned char
*utf8;
/*
Initialize Truetype library.
*/
ft_status=FT_Init_FreeType(&library);
if (ft_status != 0)
ThrowBinaryException(TypeError,"UnableToInitializeFreetypeLibrary",
image->filename);
args.flags=FT_OPEN_PATHNAME;
if (draw_info->font == (char *) NULL)
args.pathname=ConstantString("helvetica");
else
if (*draw_info->font != '@')
args.pathname=ConstantString(draw_info->font);
else
args.pathname=ConstantString(draw_info->font+1);
face=(FT_Face) NULL;
ft_status=FT_Open_Face(library,&args,(long) draw_info->face,&face);
args.pathname=DestroyString(args.pathname);
if (ft_status != 0)
{
(void) FT_Done_FreeType(library);
(void) ThrowMagickException(exception,GetMagickModule(),TypeError,
"UnableToReadFont","`%s'",draw_info->font);
return(RenderPostscript(image,draw_info,offset,metrics,exception));
}
if ((draw_info->metrics != (char *) NULL) &&
(IsPathAccessible(draw_info->metrics) != MagickFalse))
(void) FT_Attach_File(face,draw_info->metrics);
encoding_type=ft_encoding_unicode;
ft_status=FT_Select_Charmap(face,encoding_type);
if ((ft_status != 0) && (face->num_charmaps != 0))
ft_status=FT_Set_Charmap(face,face->charmaps[0]);
if (encoding != (const char *) NULL)
{
if (LocaleCompare(encoding,"AdobeCustom") == 0)
encoding_type=ft_encoding_adobe_custom;
if (LocaleCompare(encoding,"AdobeExpert") == 0)
encoding_type=ft_encoding_adobe_expert;
if (LocaleCompare(encoding,"AdobeStandard") == 0)
encoding_type=ft_encoding_adobe_standard;
if (LocaleCompare(encoding,"AppleRoman") == 0)
encoding_type=ft_encoding_apple_roman;
if (LocaleCompare(encoding,"BIG5") == 0)
encoding_type=ft_encoding_big5;
if (LocaleCompare(encoding,"GB2312") == 0)
encoding_type=ft_encoding_gb2312;
if (LocaleCompare(encoding,"Johab") == 0)
encoding_type=ft_encoding_johab;
#if defined(ft_encoding_latin_1)
if (LocaleCompare(encoding,"Latin-1") == 0)
encoding_type=ft_encoding_latin_1;
#endif
if (LocaleCompare(encoding,"Latin-2") == 0)
encoding_type=ft_encoding_latin_2;
if (LocaleCompare(encoding,"None") == 0)
encoding_type=ft_encoding_none;
if (LocaleCompare(encoding,"SJIScode") == 0)
encoding_type=ft_encoding_sjis;
if (LocaleCompare(encoding,"Symbol") == 0)
encoding_type=ft_encoding_symbol;
if (LocaleCompare(encoding,"Unicode") == 0)
encoding_type=ft_encoding_unicode;
if (LocaleCompare(encoding,"Wansung") == 0)
encoding_type=ft_encoding_wansung;
ft_status=FT_Select_Charmap(face,encoding_type);
if (ft_status != 0)
{
(void) FT_Done_Face(face);
(void) FT_Done_FreeType(library);
ThrowBinaryException(TypeError,"UnrecognizedFontEncoding",encoding);
}
}
/*
Set text size.
*/
resolution.x=DefaultResolution;
resolution.y=DefaultResolution;
if (draw_info->density != (char *) NULL)
{
GeometryInfo
geometry_info;
MagickStatusType
flags;
flags=ParseGeometry(draw_info->density,&geometry_info);
resolution.x=geometry_info.rho;
resolution.y=geometry_info.sigma;
if ((flags & SigmaValue) == 0)
resolution.y=resolution.x;
}
ft_status=FT_Set_Char_Size(face,(FT_F26Dot6) (64.0*draw_info->pointsize),
(FT_F26Dot6) (64.0*draw_info->pointsize),(FT_UInt) resolution.x,
(FT_UInt) resolution.y);
metrics->pixels_per_em.x=face->size->metrics.x_ppem;
metrics->pixels_per_em.y=face->size->metrics.y_ppem;
metrics->ascent=(double) face->size->metrics.ascender/64.0;
metrics->descent=(double) face->size->metrics.descender/64.0;
metrics->width=0;
metrics->origin.x=0;
metrics->origin.y=0;
metrics->height=(double) face->size->metrics.height/64.0;
metrics->max_advance=0.0;
if (face->size->metrics.max_advance > MagickEpsilon)
metrics->max_advance=(double) face->size->metrics.max_advance/64.0;
metrics->bounds.x1=0.0;
metrics->bounds.y1=metrics->descent;
metrics->bounds.x2=metrics->ascent+metrics->descent;
metrics->bounds.y2=metrics->ascent+metrics->descent;
metrics->underline_position=face->underline_position/64.0;
metrics->underline_thickness=face->underline_thickness/64.0;
if ((draw_info->text == (char *) NULL) || (*draw_info->text == '\0'))
{
(void) FT_Done_Face(face);
(void) FT_Done_FreeType(library);
return(MagickTrue);
}
/*
Compute bounding box.
*/
if (image->debug != MagickFalse)
(void) LogMagickEvent(AnnotateEvent,GetMagickModule(),"Font %s; "
"font-encoding %s; text-encoding %s; pointsize %g",
draw_info->font != (char *) NULL ? draw_info->font : "none",
encoding != (char *) NULL ? encoding : "none",
draw_info->encoding != (char *) NULL ? draw_info->encoding : "none",
draw_info->pointsize);
flags=FT_LOAD_NO_BITMAP;
if (draw_info->text_antialias == MagickFalse)
flags|=FT_LOAD_TARGET_MONO;
else
{
#if defined(FT_LOAD_TARGET_LIGHT)
flags|=FT_LOAD_TARGET_LIGHT;
#elif defined(FT_LOAD_TARGET_LCD)
flags|=FT_LOAD_TARGET_LCD;
#endif
}
value=GetImageProperty(image,"type:hinting",exception);
if ((value != (const char *) NULL) && (LocaleCompare(value,"off") == 0))
flags|=FT_LOAD_NO_HINTING;
glyph.id=0;
glyph.image=NULL;
last_glyph.id=0;
last_glyph.image=NULL;
origin.x=0;
origin.y=0;
affine.xx=65536L;
affine.yx=0L;
affine.xy=0L;
affine.yy=65536L;
if (draw_info->render != MagickFalse)
{
affine.xx=(FT_Fixed) (65536L*draw_info->affine.sx+0.5);
affine.yx=(FT_Fixed) (-65536L*draw_info->affine.rx+0.5);
affine.xy=(FT_Fixed) (-65536L*draw_info->affine.ry+0.5);
affine.yy=(FT_Fixed) (65536L*draw_info->affine.sy+0.5);
}
annotate_info=CloneDrawInfo((ImageInfo *) NULL,draw_info);
if (annotate_info->dash_pattern != (double *) NULL)
annotate_info->dash_pattern[0]=0.0;
(void) CloneString(&annotate_info->primitive,"path '");
if (draw_info->render != MagickFalse)
{
if (image->storage_class != DirectClass)
(void) SetImageStorageClass(image,DirectClass,exception);
if (image->alpha_trait == UndefinedPixelTrait)
(void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
}
point.x=0.0;
point.y=0.0;
for (p=draw_info->text; GetUTFCode(p) != 0; p+=GetUTFOctets(p))
if (GetUTFCode(p) < 0)
break;
utf8=(unsigned char *) NULL;
if (GetUTFCode(p) == 0)
p=draw_info->text;
else
{
utf8=ConvertLatin1ToUTF8((unsigned char *) draw_info->text);
if (utf8 != (unsigned char *) NULL)
p=(char *) utf8;
}
status=MagickTrue;
direction=RAQM_DIRECTION_DEFAULT;
if (draw_info->direction == RightToLeftDirection)
direction=RAQM_DIRECTION_RTL;
else
if (draw_info->direction == LeftToRightDirection)
direction=RAQM_DIRECTION_LTR;
grapheme=(raqm_glyph_info_t *) NULL;
length=ComplexTextLayout(p,strlen(p),face,direction,flags,&grapheme);
code=0;
for (i=0; i < (ssize_t) length; i++)
{
/*
Render UTF-8 sequence.
*/
glyph.id=grapheme[i].index;
if (glyph.id == 0)
glyph.id=FT_Get_Char_Index(face,'?');
if ((glyph.id != 0) && (last_glyph.id != 0))
origin.x+=(FT_Pos) (64.0*draw_info->kerning);
glyph.origin=origin;
glyph.origin.x+=grapheme[i].x_offset;
glyph.origin.y+=grapheme[i].y_offset;
ft_status=FT_Load_Glyph(face,glyph.id,flags);
if (ft_status != 0)
continue;
ft_status=FT_Get_Glyph(face->glyph,&glyph.image);
if (ft_status != 0)
continue;
ft_status=FT_Outline_Get_BBox(&((FT_OutlineGlyph) glyph.image)->outline,
&bounds);
if (ft_status != 0)
continue;
if ((p == draw_info->text) || (bounds.xMin < metrics->bounds.x1))
metrics->bounds.x1=(double) bounds.xMin;
if ((p == draw_info->text) || (bounds.yMin < metrics->bounds.y1))
metrics->bounds.y1=(double) bounds.yMin;
if ((p == draw_info->text) || (bounds.xMax > metrics->bounds.x2))
metrics->bounds.x2=(double) bounds.xMax;
if ((p == draw_info->text) || (bounds.yMax > metrics->bounds.y2))
metrics->bounds.y2=(double) bounds.yMax;
if (((draw_info->stroke.alpha != TransparentAlpha) ||
(draw_info->stroke_pattern != (Image *) NULL)) &&
((status != MagickFalse) && (draw_info->render != MagickFalse)))
{
/*
Trace the glyph.
*/
annotate_info->affine.tx=glyph.origin.x/64.0;
annotate_info->affine.ty=(-glyph.origin.y/64.0);
(void) FT_Outline_Decompose(&((FT_OutlineGlyph) glyph.image)->outline,
&OutlineMethods,annotate_info);
}
FT_Vector_Transform(&glyph.origin,&affine);
(void) FT_Glyph_Transform(glyph.image,&affine,&glyph.origin);
ft_status=FT_Glyph_To_Bitmap(&glyph.image,ft_render_mode_normal,
(FT_Vector *) NULL,MagickTrue);
if (ft_status != 0)
continue;
bitmap=(FT_BitmapGlyph) glyph.image;
point.x=offset->x+bitmap->left;
if (bitmap->bitmap.pixel_mode == ft_pixel_mode_mono)
point.x=offset->x+(origin.x >> 6);
point.y=offset->y-bitmap->top;
if (draw_info->render != MagickFalse)
{
CacheView
*image_view;
register unsigned char
*r;
/*
Rasterize the glyph.
*/
image_view=AcquireAuthenticCacheView(image,exception);
r=bitmap->bitmap.buffer;
for (y=0; y < (ssize_t) bitmap->bitmap.rows; y++)
{
MagickBooleanType
active,
sync;
double
fill_opacity;
PixelInfo
fill_color;
register Quantum
*magick_restrict q;
register ssize_t
x;
ssize_t
n,
x_offset,
y_offset;
if (status == MagickFalse)
continue;
x_offset=(ssize_t) ceil(point.x-0.5);
y_offset=(ssize_t) ceil(point.y+y-0.5);
if ((y_offset < 0) || (y_offset >= (ssize_t) image->rows))
continue;
q=(Quantum *) NULL;
if ((x_offset < 0) || (x_offset >= (ssize_t) image->columns))
active=MagickFalse;
else
{
q=GetCacheViewAuthenticPixels(image_view,x_offset,y_offset,
bitmap->bitmap.width,1,exception);
active=q != (Quantum *) NULL ? MagickTrue : MagickFalse;
}
n=y*bitmap->bitmap.pitch-1;
for (x=0; x < (ssize_t) bitmap->bitmap.width; x++)
{
n++;
x_offset++;
if ((x_offset < 0) || (x_offset >= (ssize_t) image->columns))
{
if (q != (Quantum *) NULL)
q+=GetPixelChannels(image);
continue;
}
if (bitmap->bitmap.pixel_mode != ft_pixel_mode_mono)
fill_opacity=(double) (r[n])/(bitmap->bitmap.num_grays-1);
else
fill_opacity=((r[(x >> 3)+y*bitmap->bitmap.pitch] &
(1 << (~x & 0x07)))) == 0 ? 0.0 : 1.0;
if (draw_info->text_antialias == MagickFalse)
fill_opacity=fill_opacity >= 0.5 ? 1.0 : 0.0;
if (active == MagickFalse)
q=GetCacheViewAuthenticPixels(image_view,x_offset,y_offset,1,1,
exception);
if (q == (Quantum *) NULL)
continue;
GetPixelInfo(image,&fill_color);
(void) GetFillColor(draw_info,x_offset,y_offset,&fill_color,
exception);
fill_opacity=fill_opacity*fill_color.alpha;
CompositePixelOver(image,&fill_color,fill_opacity,q,
GetPixelAlpha(image,q),q);
if (active == MagickFalse)
{
sync=SyncCacheViewAuthenticPixels(image_view,exception);
if (sync == MagickFalse)
status=MagickFalse;
}
q+=GetPixelChannels(image);
}
sync=SyncCacheViewAuthenticPixels(image_view,exception);
if (sync == MagickFalse)
status=MagickFalse;
}
image_view=DestroyCacheView(image_view);
if (((draw_info->stroke.alpha != TransparentAlpha) ||
(draw_info->stroke_pattern != (Image *) NULL)) &&
(status != MagickFalse))
{
/*
Draw text stroke.
*/
annotate_info->linejoin=RoundJoin;
annotate_info->affine.tx=offset->x;
annotate_info->affine.ty=offset->y;
(void) ConcatenateString(&annotate_info->primitive,"'");
(void) DrawImage(image,annotate_info,exception);
(void) CloneString(&annotate_info->primitive,"path '");
}
}
if ((bitmap->left+bitmap->bitmap.width) > metrics->width)
metrics->width=bitmap->left+bitmap->bitmap.width;
if ((fabs(draw_info->interword_spacing) >= MagickEpsilon) &&
(IsUTFSpace(GetUTFCode(p+grapheme[i].cluster)) != MagickFalse) &&
(IsUTFSpace(code) == MagickFalse))
origin.x+=(FT_Pos) (64.0*draw_info->interword_spacing);
else
origin.x+=(FT_Pos) grapheme[i].x_advance;
metrics->origin.x=(double) origin.x;
metrics->origin.y=(double) origin.y;
if (last_glyph.id != 0)
FT_Done_Glyph(last_glyph.image);
last_glyph=glyph;
code=GetUTFCode(p+grapheme[i].cluster);
}
if (grapheme != (raqm_glyph_info_t *) NULL)
grapheme=(raqm_glyph_info_t *) RelinquishMagickMemory(grapheme);
if (utf8 != (unsigned char *) NULL)
utf8=(unsigned char *) RelinquishMagickMemory(utf8);
if (last_glyph.id != 0)
FT_Done_Glyph(last_glyph.image);
/*
Determine font metrics.
*/
glyph.id=FT_Get_Char_Index(face,'_');
glyph.origin=origin;
ft_status=FT_Load_Glyph(face,glyph.id,flags);
if (ft_status == 0)
{
ft_status=FT_Get_Glyph(face->glyph,&glyph.image);
if (ft_status == 0)
{
ft_status=FT_Outline_Get_BBox(&((FT_OutlineGlyph) glyph.image)->
outline,&bounds);
if (ft_status == 0)
{
FT_Vector_Transform(&glyph.origin,&affine);
(void) FT_Glyph_Transform(glyph.image,&affine,&glyph.origin);
ft_status=FT_Glyph_To_Bitmap(&glyph.image,ft_render_mode_normal,
(FT_Vector *) NULL,MagickTrue);
bitmap=(FT_BitmapGlyph) glyph.image;
if (bitmap->left > metrics->width)
metrics->width=bitmap->left;
}
}
FT_Done_Glyph(glyph.image);
}
metrics->width-=metrics->bounds.x1/64.0;
metrics->width+=annotate_info->stroke_width;
metrics->bounds.x1/=64.0;
metrics->bounds.y1/=64.0;
metrics->bounds.x2/=64.0;
metrics->bounds.y2/=64.0;
metrics->origin.x/=64.0;
metrics->origin.y/=64.0;
/*
Relinquish resources.
*/
annotate_info=DestroyDrawInfo(annotate_info);
(void) FT_Done_Face(face);
(void) FT_Done_FreeType(library);
return(status);
}
#else
static MagickBooleanType RenderFreetype(Image *image,const DrawInfo *draw_info,
const char *magick_unused(encoding),const PointInfo *offset,
TypeMetric *metrics,ExceptionInfo *exception)
{
(void) ThrowMagickException(exception,GetMagickModule(),
MissingDelegateWarning,"DelegateLibrarySupportNotBuiltIn","'%s' (Freetype)",
draw_info->font != (char *) NULL ? draw_info->font : "none");
return(RenderPostscript(image,draw_info,offset,metrics,exception));
}
#endif
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e n d e r P o s t s c r i p t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RenderPostscript() renders text on the image with a Postscript font. It
% also returns the bounding box of the text relative to the image.
%
% The format of the RenderPostscript method is:
%
% MagickBooleanType RenderPostscript(Image *image,DrawInfo *draw_info,
% const PointInfo *offset,TypeMetric *metrics,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o draw_info: the draw info.
%
% o offset: (x,y) location of text relative to image.
%
% o metrics: bounding box of text.
%
% o exception: return any errors or warnings in this structure.
%
*/
static char *EscapeParenthesis(const char *text)
{
char
*buffer;
register char
*p;
register ssize_t
i;
size_t
escapes;
escapes=0;
buffer=AcquireString(text);
p=buffer;
for (i=0; i < (ssize_t) MagickMin(strlen(text),MagickPathExtent-escapes-1); i++)
{
if ((text[i] == '(') || (text[i] == ')'))
{
*p++='\\';
escapes++;
}
*p++=text[i];
}
*p='\0';
return(buffer);
}
static MagickBooleanType RenderPostscript(Image *image,
const DrawInfo *draw_info,const PointInfo *offset,TypeMetric *metrics,
ExceptionInfo *exception)
{
char
filename[MagickPathExtent],
geometry[MagickPathExtent],
*text;
FILE
*file;
Image
*annotate_image;
ImageInfo
*annotate_info;
int
unique_file;
MagickBooleanType
identity;
PointInfo
extent,
point,
resolution;
register ssize_t
i;
size_t
length;
ssize_t
y;
/*
Render label with a Postscript font.
*/
if (image->debug != MagickFalse)
(void) LogMagickEvent(AnnotateEvent,GetMagickModule(),
"Font %s; pointsize %g",draw_info->font != (char *) NULL ?
draw_info->font : "none",draw_info->pointsize);
file=(FILE *) NULL;
unique_file=AcquireUniqueFileResource(filename);
if (unique_file != -1)
file=fdopen(unique_file,"wb");
if ((unique_file == -1) || (file == (FILE *) NULL))
{
ThrowFileException(exception,FileOpenError,"UnableToOpenFile",filename);
return(MagickFalse);
}
(void) FormatLocaleFile(file,"%%!PS-Adobe-3.0\n");
(void) FormatLocaleFile(file,"/ReencodeType\n");
(void) FormatLocaleFile(file,"{\n");
(void) FormatLocaleFile(file," findfont dup length\n");
(void) FormatLocaleFile(file,
" dict begin { 1 index /FID ne {def} {pop pop} ifelse } forall\n");
(void) FormatLocaleFile(file,
" /Encoding ISOLatin1Encoding def currentdict end definefont pop\n");
(void) FormatLocaleFile(file,"} bind def\n");
/*
Sample to compute bounding box.
*/
identity=(fabs(draw_info->affine.sx-draw_info->affine.sy) < MagickEpsilon) &&
(fabs(draw_info->affine.rx) < MagickEpsilon) &&
(fabs(draw_info->affine.ry) < MagickEpsilon) ? MagickTrue : MagickFalse;
extent.x=0.0;
extent.y=0.0;
length=strlen(draw_info->text);
for (i=0; i <= (ssize_t) (length+2); i++)
{
point.x=fabs(draw_info->affine.sx*i*draw_info->pointsize+
draw_info->affine.ry*2.0*draw_info->pointsize);
point.y=fabs(draw_info->affine.rx*i*draw_info->pointsize+
draw_info->affine.sy*2.0*draw_info->pointsize);
if (point.x > extent.x)
extent.x=point.x;
if (point.y > extent.y)
extent.y=point.y;
}
(void) FormatLocaleFile(file,"%g %g moveto\n",identity != MagickFalse ? 0.0 :
extent.x/2.0,extent.y/2.0);
(void) FormatLocaleFile(file,"%g %g scale\n",draw_info->pointsize,
draw_info->pointsize);
if ((draw_info->font == (char *) NULL) || (*draw_info->font == '\0') ||
(strchr(draw_info->font,'/') != (char *) NULL))
(void) FormatLocaleFile(file,
"/Times-Roman-ISO dup /Times-Roman ReencodeType findfont setfont\n");
else
(void) FormatLocaleFile(file,
"/%s-ISO dup /%s ReencodeType findfont setfont\n",draw_info->font,
draw_info->font);
(void) FormatLocaleFile(file,"[%g %g %g %g 0 0] concat\n",
draw_info->affine.sx,-draw_info->affine.rx,-draw_info->affine.ry,
draw_info->affine.sy);
text=EscapeParenthesis(draw_info->text);
if (identity == MagickFalse)
(void) FormatLocaleFile(file,"(%s) stringwidth pop -0.5 mul -0.5 rmoveto\n",
text);
(void) FormatLocaleFile(file,"(%s) show\n",text);
text=DestroyString(text);
(void) FormatLocaleFile(file,"showpage\n");
(void) fclose(file);
(void) FormatLocaleString(geometry,MagickPathExtent,"%.20gx%.20g+0+0!",
floor(extent.x+0.5),floor(extent.y+0.5));
annotate_info=AcquireImageInfo();
(void) FormatLocaleString(annotate_info->filename,MagickPathExtent,"ps:%s",
filename);
(void) CloneString(&annotate_info->page,geometry);
if (draw_info->density != (char *) NULL)
(void) CloneString(&annotate_info->density,draw_info->density);
annotate_info->antialias=draw_info->text_antialias;
annotate_image=ReadImage(annotate_info,exception);
CatchException(exception);
annotate_info=DestroyImageInfo(annotate_info);
(void) RelinquishUniqueFileResource(filename);
if (annotate_image == (Image *) NULL)
return(MagickFalse);
(void) NegateImage(annotate_image,MagickFalse,exception);
resolution.x=DefaultResolution;
resolution.y=DefaultResolution;
if (draw_info->density != (char *) NULL)
{
GeometryInfo
geometry_info;
MagickStatusType
flags;
flags=ParseGeometry(draw_info->density,&geometry_info);
resolution.x=geometry_info.rho;
resolution.y=geometry_info.sigma;
if ((flags & SigmaValue) == 0)
resolution.y=resolution.x;
}
if (identity == MagickFalse)
(void) TransformImage(&annotate_image,"0x0",(char *) NULL,exception);
else
{
RectangleInfo
crop_info;
crop_info=GetImageBoundingBox(annotate_image,exception);
crop_info.height=(size_t) ((resolution.y/DefaultResolution)*
ExpandAffine(&draw_info->affine)*draw_info->pointsize+0.5);
crop_info.y=(ssize_t) ceil((resolution.y/DefaultResolution)*extent.y/8.0-
0.5);
(void) FormatLocaleString(geometry,MagickPathExtent,
"%.20gx%.20g%+.20g%+.20g",(double) crop_info.width,(double)
crop_info.height,(double) crop_info.x,(double) crop_info.y);
(void) TransformImage(&annotate_image,geometry,(char *) NULL,exception);
}
metrics->pixels_per_em.x=(resolution.y/DefaultResolution)*
ExpandAffine(&draw_info->affine)*draw_info->pointsize;
metrics->pixels_per_em.y=metrics->pixels_per_em.x;
metrics->ascent=metrics->pixels_per_em.x;
metrics->descent=metrics->pixels_per_em.y/-5.0;
metrics->width=(double) annotate_image->columns/
ExpandAffine(&draw_info->affine);
metrics->height=1.152*metrics->pixels_per_em.x;
metrics->max_advance=metrics->pixels_per_em.x;
metrics->bounds.x1=0.0;
metrics->bounds.y1=metrics->descent;
metrics->bounds.x2=metrics->ascent+metrics->descent;
metrics->bounds.y2=metrics->ascent+metrics->descent;
metrics->underline_position=(-2.0);
metrics->underline_thickness=1.0;
if (draw_info->render == MagickFalse)
{
annotate_image=DestroyImage(annotate_image);
return(MagickTrue);
}
if (draw_info->fill.alpha != TransparentAlpha)
{
CacheView
*annotate_view;
MagickBooleanType
sync;
PixelInfo
fill_color;
/*
Render fill color.
*/
if (image->alpha_trait == UndefinedPixelTrait)
(void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception);
if (annotate_image->alpha_trait == UndefinedPixelTrait)
(void) SetImageAlphaChannel(annotate_image,OpaqueAlphaChannel,
exception);
fill_color=draw_info->fill;
annotate_view=AcquireAuthenticCacheView(annotate_image,exception);
for (y=0; y < (ssize_t) annotate_image->rows; y++)
{
register ssize_t
x;
register Quantum
*magick_restrict q;
q=GetCacheViewAuthenticPixels(annotate_view,0,y,annotate_image->columns,
1,exception);
if (q == (Quantum *) NULL)
break;
for (x=0; x < (ssize_t) annotate_image->columns; x++)
{
(void) GetFillColor(draw_info,x,y,&fill_color,exception);
SetPixelAlpha(annotate_image,ClampToQuantum((((double) QuantumScale*
GetPixelIntensity(annotate_image,q)*fill_color.alpha))),q);
SetPixelRed(annotate_image,fill_color.red,q);
SetPixelGreen(annotate_image,fill_color.green,q);
SetPixelBlue(annotate_image,fill_color.blue,q);
q+=GetPixelChannels(annotate_image);
}
sync=SyncCacheViewAuthenticPixels(annotate_view,exception);
if (sync == MagickFalse)
break;
}
annotate_view=DestroyCacheView(annotate_view);
(void) CompositeImage(image,annotate_image,OverCompositeOp,MagickTrue,
(ssize_t) ceil(offset->x-0.5),(ssize_t) ceil(offset->y-(metrics->ascent+
metrics->descent)-0.5),exception);
}
annotate_image=DestroyImage(annotate_image);
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e n d e r X 1 1 %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RenderX11() renders text on the image with an X11 font. It also returns the
% bounding box of the text relative to the image.
%
% The format of the RenderX11 method is:
%
% MagickBooleanType RenderX11(Image *image,DrawInfo *draw_info,
% const PointInfo *offset,TypeMetric *metrics,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o draw_info: the draw info.
%
% o offset: (x,y) location of text relative to image.
%
% o metrics: bounding box of text.
%
% o exception: return any errors or warnings in this structure.
%
*/
static MagickBooleanType RenderX11(Image *image,const DrawInfo *draw_info,
const PointInfo *offset,TypeMetric *metrics,ExceptionInfo *exception)
{
MagickBooleanType
status;
if (annotate_semaphore == (SemaphoreInfo *) NULL)
ActivateSemaphoreInfo(&annotate_semaphore);
LockSemaphoreInfo(annotate_semaphore);
status=XRenderImage(image,draw_info,offset,metrics,exception);
UnlockSemaphoreInfo(annotate_semaphore);
return(status);
}