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annotate.c
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/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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.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_RAQM_DELEGATE)
#include <raqm.h>
#else
typedef enum
{
RAQM_DIRECTION_DEFAULT,
RAQM_DIRECTION_RTL,
RAQM_DIRECTION_LTR,
RAQM_DIRECTION_TTB
} raqm_direction_t;
#endif
typedef struct _GraphemeInfo
{
int
index,
x_offset,
x_advance,
y_offset;
unsigned int
cluster;
} GraphemeInfo;
/*
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
digit,
status;
register char
*p,
*q,
*s;
register ssize_t
i;
size_t
width;
ssize_t
n;
digit=MagickFalse;
text=AcquireString(draw_info->text);
q=draw_info->text;
s=(char *) NULL;
for (p=(*caption); GetUTFCode(p) != 0; p+=GetUTFOctets(p))
{
if ((digit == MagickFalse) && (IsUTFSpace(GetUTFCode(p)) != MagickFalse))
s=p;
digit=((GetUTFCode(p) >= 0x0030) && (GetUTFCode(p) <= 0x0039)) ?
MagickTrue : MagickFalse;
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 %
% %
% %
% %