/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d L A B E L I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadLABELImage() reads a LABEL image file and returns it. It
% allocates the memory necessary for the new Image structure and returns a
% pointer to the new image.
%
% The format of the ReadLABELImage method is:
%
% Image *ReadLABELImage(const ImageInfo *image_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadLABELImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
char
geometry[MaxTextExtent],
*property;
const char
*label;
DrawInfo
*draw_info;
Image
*image;
MagickBooleanType
status;
TypeMetric
metrics;
size_t
height,
width;
/*
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);
(void) ResetImagePage(image,"0x0+0+0");
property=InterpretImageProperties(image_info,image,image_info->filename);
(void) SetImageProperty(image,"label",property);
property=DestroyString(property);
label=GetImageProperty(image,"label");
draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
draw_info->text=ConstantString(label);
if (((image->columns != 0) || (image->rows != 0)) &&
(image_info->pointsize == 0.0))
{
/*
Fit label to canvas size.
*/
status=GetMultilineTypeMetrics(image,draw_info,&metrics);
for ( ; status != MagickFalse; draw_info->pointsize*=2.0)
{
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 (((image->columns != 0) && (width > (image->columns+1))) ||
((image->rows != 0) && (height > (image->rows+1))))
break;
status=GetMultilineTypeMetrics(image,draw_info,&metrics);
}
for ( ; status != MagickFalse; draw_info->pointsize--)
{
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 ((image->columns != 0) && (width <= (image->columns+1)) &&
((image->rows == 0) || (height <= (image->rows+1))))
break;
if ((image->rows != 0) && (height <= (image->rows+1)) &&
((image->columns == 0) || (width <= (image->columns+1))))
break;
if (draw_info->pointsize < 2.0)
break;
status=GetMultilineTypeMetrics(image,draw_info,&metrics);
}
}
status=GetMultilineTypeMetrics(image,draw_info,&metrics);
if (status == MagickFalse)
{
InheritException(exception,&image->exception);
image=DestroyImageList(image);
return((Image *) NULL);
}
if (image->columns == 0)
image->columns=(size_t) (metrics.width+draw_info->stroke_width+1.5);
if (image->columns == 0)
image->columns=(size_t) (draw_info->pointsize+
draw_info->stroke_width+1.5);
if (draw_info->gravity == UndefinedGravity)
{
(void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
-metrics.bounds.x1+draw_info->stroke_width/2.0,metrics.ascent+
draw_info->stroke_width/2.0);
draw_info->geometry=AcquireString(geometry);
}
if (image->rows == 0)
image->rows=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
if (image->rows == 0)
image->rows=(size_t) floor(draw_info->pointsize+draw_info->stroke_width+
0.5);
if (SetImageBackgroundColor(image) == MagickFalse)
{
InheritException(exception,&image->exception);
image=DestroyImageList(image);
return((Image *) NULL);
}
(void) AnnotateImage(image,draw_info);
if (image_info->pointsize == 0.0)
{
char
pointsize[MaxTextExtent];
(void) FormatLocaleString(pointsize,MaxTextExtent,"%.20g",
draw_info->pointsize);
(void) SetImageProperty(image,"label:pointsize",pointsize);
}
draw_info=DestroyDrawInfo(draw_info);
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d C A P T I O N I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadCAPTIONImage() reads a CAPTION image file and returns it. It
% allocates the memory necessary for the new Image structure and returns a
% pointer to the new image.
%
% The format of the ReadCAPTIONImage method is:
%
% Image *ReadCAPTIONImage(const ImageInfo *image_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadCAPTIONImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
char
*caption,
geometry[MaxTextExtent],
*property,
*text;
const char
*gravity,
*option;
DrawInfo
*draw_info;
Image
*image;
MagickBooleanType
split,
status;
register ssize_t
i;
size_t
height,
width;
TypeMetric
metrics;
/*
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);
(void) ResetImagePage(image,"0x0+0+0");
/*
Format caption.
*/
option=GetImageOption(image_info,"filename");
if (option == (const char *) NULL)
property=InterpretImageProperties(image_info,image,image_info->filename);
else
if (LocaleNCompare(option,"caption:",8) == 0)
property=InterpretImageProperties(image_info,image,option+8);
else
property=InterpretImageProperties(image_info,image,option);
(void) SetImageProperty(image,"caption",property);
property=DestroyString(property);
caption=ConstantString(GetImageProperty(image,"caption"));
draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
(void) CloneString(&draw_info->text,caption);
gravity=GetImageOption(image_info,"gravity");
if (gravity != (char *) NULL)
draw_info->gravity=(GravityType) ParseCommandOption(MagickGravityOptions,
MagickFalse,gravity);
split=MagickFalse;
status=MagickTrue;
if (image->columns == 0)
{
text=AcquireString(caption);
i=FormatMagickCaption(image,draw_info,split,&metrics,&text);
(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);
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);
(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);
image->rows=(size_t) ((i+1)*(metrics.ascent-metrics.descent+
draw_info->interline_spacing+draw_info->stroke_width)+0.5);
}
if (status != MagickFalse)
status=SetImageExtent(image,image->columns,image->rows);
if (status == MagickFalse)
{
draw_info=DestroyDrawInfo(draw_info);
InheritException(exception,&image->exception);
return(DestroyImageList(image));
}
if (SetImageBackgroundColor(image) == MagickFalse)
{
draw_info=DestroyDrawInfo(draw_info);
InheritException(exception,&image->exception);
image=DestroyImageList(image);
return((Image *) NULL);
}
if (fabs(image_info->pointsize) < MagickEpsilon)
{
double
high,
low;
/*
Auto fit text into bounding box.
*/
for ( ; ; draw_info->pointsize*=2.0)
{
text=AcquireString(caption);
i=FormatMagickCaption(image,draw_info,split,&metrics,&text);
(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);
(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 ((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;
}
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,split,&metrics,&text);
(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);
(void) GetMultilineTypeMetrics(image,draw_info,&metrics);
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 ((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=(low+high)/2.0-0.5;
}
/*
Draw caption.
*/
i=FormatMagickCaption(image,draw_info,split,&metrics,&caption);
(void) CloneString(&draw_info->text,caption);
(void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",MagickMax(
draw_info->direction == RightToLeftDirection ? image->columns-
metrics.bounds.x2 : -metrics.bounds.x1,0.0),draw_info->gravity ==
UndefinedGravity ? metrics.ascent : 0.0);
draw_info->geometry=AcquireString(geometry);
status=AnnotateImage(image,draw_info);
if (image_info->pointsize == 0.0)
{
char
pointsize[MaxTextExtent];
(void) FormatLocaleString(pointsize,MaxTextExtent,"%.20g",
draw_info->pointsize);
(void) SetImageProperty(image,"caption:pointsize",pointsize);
}
draw_info=DestroyDrawInfo(draw_info);
caption=DestroyString(caption);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d C A P T I O N I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadCAPTIONImage() reads a CAPTION image file and returns it. It
% allocates the memory necessary for the new Image structure and returns a
% pointer to the new image.
%
% The format of the ReadCAPTIONImage method is:
%
% Image *ReadCAPTIONImage(const ImageInfo *image_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadCAPTIONImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
char
*caption,
geometry[MaxTextExtent],
*property;
const char
*gravity;
DrawInfo
*draw_info;
Image
*image;
MagickBooleanType
status;
register long
i;
TypeMetric
metrics;
unsigned long
height,
width;
/*
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);
if (image->columns == 0)
ThrowReaderException(OptionError,"MustSpecifyImageSize");
(void) ResetImagePage(image,"0x0+0+0");
/*
Format caption.
*/
property=InterpretImageProperties(image_info,image,image_info->filename);
(void) SetImageProperty(image,"caption",property);
property=DestroyString(property);
caption=ConstantString(GetImageProperty(image,"caption"));
draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
draw_info->text=ConstantString(caption);
gravity=GetImageOption(image_info,"gravity");
if (gravity != (char *) NULL)
draw_info->gravity=(GravityType) ParseMagickOption(MagickGravityOptions,
MagickFalse,gravity);
if ((*caption != '\0') && (image->rows != 0) &&
(image_info->pointsize == 0.0))
{
char
*text;
/*
Scale text to fit bounding box.
*/
for ( ; ; )
{
text=AcquireString(caption);
i=FormatMagickCaption(image,draw_info,&metrics,&text);
(void) CloneString(&draw_info->text,text);
text=DestroyString(text);
(void) FormatMagickString(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);
width=(unsigned long) floor(metrics.width+draw_info->stroke_width+0.5);
height=(unsigned long) floor(metrics.height+draw_info->stroke_width+
0.5);
if ((width > (image->columns+1)) || (height > (image->rows+1)))
break;
draw_info->pointsize*=2.0;
}
draw_info->pointsize/=2.0;
for ( ; ; )
{
text=AcquireString(caption);
i=FormatMagickCaption(image,draw_info,&metrics,&text);
(void) CloneString(&draw_info->text,text);
text=DestroyString(text);
(void) FormatMagickString(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);
width=(unsigned long) floor(metrics.width+draw_info->stroke_width+0.5);
height=(unsigned long) floor(metrics.height+draw_info->stroke_width+
0.5);
if ((width > (image->columns+1)) || (height > (image->rows+1)))
break;
draw_info->pointsize++;
}
draw_info->pointsize--;
}
i=FormatMagickCaption(image,draw_info,&metrics,&caption);
if (image->rows == 0)
image->rows=(unsigned long) ((i+1)*(metrics.ascent-metrics.descent+
draw_info->stroke_width)+0.5);
if (image->rows == 0)
image->rows=(unsigned long) ((i+1)*draw_info->pointsize+
draw_info->stroke_width+0.5);
if (SetImageBackgroundColor(image) == MagickFalse)
{
InheritException(exception,&image->exception);
image=DestroyImageList(image);
return((Image *) NULL);
}
/*
Draw caption.
*/
(void) CloneString(&draw_info->text,caption);
status=GetMultilineTypeMetrics(image,draw_info,&metrics);
if (draw_info->gravity != UndefinedGravity)
image->page.x=(long) (metrics.bounds.x1-draw_info->stroke_width/2.0);
else
{
(void) FormatMagickString(geometry,MaxTextExtent,"%+g%+g",
-metrics.bounds.x1+draw_info->stroke_width/2.0,metrics.ascent+
draw_info->stroke_width/2.0);
(void) CloneString(&draw_info->geometry,geometry);
}
(void) AnnotateImage(image,draw_info);
draw_info=DestroyDrawInfo(draw_info);
caption=DestroyString(caption);
return(GetFirstImageInList(image));
}
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;
PixelPacket
fill_color;
RectangleInfo
page;
register PixelPacket
*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);
(void) ResetImagePage(image,"0x0+0+0");
/*
Get context.
*/
fontmap=(PangoFontMap *) pango_ft2_font_map_new();
pango_ft2_font_map_set_resolution((PangoFT2FontMap *) fontmap,
image->x_resolution,image->y_resolution);
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->x_resolution*
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);
(void) SetImageProperty(image,"caption",property);
property=DestroyString(property);
caption=ConstantString(GetImageProperty(image,"caption"));
/*
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->x_resolution+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->y_resolution+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) == 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);
}
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 == (PixelPacket *) NULL)
break;
q+=page.x;
for (x=page.x; x < (ssize_t) (image->columns-page.x); x++)
{
MagickRealType
fill_opacity;
(void) GetFillColor(draw_info,x,y,&fill_color);
fill_opacity=QuantumRange-(*p)/canvas->num_grays*(QuantumRange-
fill_color.opacity);
if (draw_info->text_antialias == MagickFalse)
fill_opacity=fill_opacity >= 0.5 ? 1.0 : 0.0;
MagickCompositeOver(&fill_color,fill_opacity,q,q->opacity,q);
p++;
q++;
}
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));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d C A P T I O N I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadCAPTIONImage() reads a CAPTION image file and returns it. It
% allocates the memory necessary for the new Image structure and returns a
% pointer to the new image.
%
% The format of the ReadCAPTIONImage method is:
%
% Image *ReadCAPTIONImage(const ImageInfo *image_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadCAPTIONImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
char
*caption,
geometry[MaxTextExtent],
*property;
const char
*gravity,
*option;
DrawInfo
*draw_info;
Image
*image;
MagickBooleanType
status;
register ssize_t
i;
size_t
height,
width;
TypeMetric
metrics;
/*
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);
if (image->columns == 0)
ThrowReaderException(OptionError,"MustSpecifyImageSize");
(void) ResetImagePage(image,"0x0+0+0");
/*
Format caption.
*/
option=GetImageOption(image_info,"filename");
if (option == (const char *) NULL)
property=InterpretImageProperties(image_info,image,image_info->filename,
exception);
else
if (LocaleNCompare(option,"caption:",8) == 0)
property=InterpretImageProperties(image_info,image,option+8,exception);
else
property=InterpretImageProperties(image_info,image,option,exception);
(void) SetImageProperty(image,"caption",property,exception);
property=DestroyString(property);
caption=ConstantString(GetImageProperty(image,"caption",exception));
draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
(void) CloneString(&draw_info->text,caption);
gravity=GetImageOption(image_info,"gravity");
if (gravity != (char *) NULL)
draw_info->gravity=(GravityType) ParseCommandOption(MagickGravityOptions,
MagickFalse,gravity);
if ((*caption != '\0') && (image->rows != 0) &&
(image_info->pointsize == 0.0))
{
char
*text;
double
high,
low;
/*
Auto fit text into bounding box.
*/
for ( ; ; )
{
text=AcquireString(caption);
i=FormatMagickCaption(image,draw_info,MagickTrue,&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);
(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) && (height > image->rows))
break;
draw_info->pointsize*=2.0;
}
high=draw_info->pointsize/2.0;
low=high/2.0;
while ((high-low) > 1.0)
{
draw_info->pointsize=(low+high)/2.0;
text=AcquireString(caption);
i=FormatMagickCaption(image,draw_info,MagickTrue,&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);
height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
if ((width <= image->columns) && (height <= image->rows))
low=draw_info->pointsize+1.0;
else
high=draw_info->pointsize-1.0;
}
for (draw_info->pointsize=(low+high)/2.0; ; )
{
text=AcquireString(caption);
i=FormatMagickCaption(image,draw_info,MagickTrue,&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);
height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
if ((width <= image->columns) && (height <= image->rows))
break;
draw_info->pointsize--;
}
draw_info->pointsize=floor(draw_info->pointsize);
}
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);
if (SetImageBackgroundColor(image,exception) == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
/*
Draw caption.
*/
(void) CloneString(&draw_info->text,caption);
status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
if ((draw_info->gravity != UndefinedGravity) &&
(draw_info->direction != RightToLeftDirection))
image->page.x=(ssize_t) (metrics.bounds.x1-draw_info->stroke_width/2.0);
else
{
(void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
-metrics.bounds.x1+draw_info->stroke_width/2.0,metrics.ascent+
draw_info->stroke_width/2.0);
if (draw_info->direction == RightToLeftDirection)
(void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
image->columns-(metrics.bounds.x2+draw_info->stroke_width/2.0),
metrics.ascent+draw_info->stroke_width/2.0);
draw_info->geometry=AcquireString(geometry);
}
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));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d L A B E L I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadLABELImage() reads a LABEL image file and returns it. It
% allocates the memory necessary for the new Image structure and returns a
% pointer to the new image.
%
% The format of the ReadLABELImage method is:
%
% Image *ReadLABELImage(const ImageInfo *image_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadLABELImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
char
geometry[MagickPathExtent],
*property;
const char
*label;
DrawInfo
*draw_info;
Image
*image;
MagickBooleanType
status;
TypeMetric
metrics;
size_t
height,
width;
/*
Initialize Image structure.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickCoreSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
image=AcquireImage(image_info,exception);
(void) ResetImagePage(image,"0x0+0+0");
property=InterpretImageProperties((ImageInfo *) image_info,image,
image_info->filename,exception);
(void) SetImageProperty(image,"label",property,exception);
property=DestroyString(property);
label=GetImageProperty(image,"label",exception);
draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
draw_info->text=ConstantString(label);
metrics.width=0;
metrics.ascent=0.0;
status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
if ((image->columns == 0) && (image->rows == 0))
{
image->columns=(size_t) (metrics.width+draw_info->stroke_width+0.5);
image->rows=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
}
else
if (((image->columns == 0) || (image->rows == 0)) ||
(fabs(image_info->pointsize) < MagickEpsilon))
{
double
high,
low;
/*
Auto fit text into bounding box.
*/
for ( ; ; draw_info->pointsize*=2.0)
{
(void) FormatLocaleString(geometry,MagickPathExtent,"%+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);
height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
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;
}
high=draw_info->pointsize;
for (low=1.0; (high-low) > 0.5; )
{
draw_info->pointsize=(low+high)/2.0;
(void) FormatLocaleString(geometry,MagickPathExtent,"%+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);
height=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
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=(low+high)/2.0-0.5;
}
status=GetMultilineTypeMetrics(image,draw_info,&metrics,exception);
if (status == MagickFalse)
{
draw_info=DestroyDrawInfo(draw_info);
image=DestroyImageList(image);
return((Image *) NULL);
}
if (image->columns == 0)
image->columns=(size_t) (metrics.width+draw_info->stroke_width+0.5);
if (image->columns == 0)
image->columns=(size_t) (draw_info->pointsize+draw_info->stroke_width+0.5);
if (image->rows == 0)
image->rows=(size_t) (metrics.ascent-metrics.descent+
draw_info->stroke_width+0.5);
if (image->rows == 0)
image->rows=(size_t) (draw_info->pointsize+draw_info->stroke_width+0.5);
status=SetImageExtent(image,image->columns,image->rows,exception);
if (status == MagickFalse)
{
draw_info=DestroyDrawInfo(draw_info);
return(DestroyImageList(image));
}
if (SetImageBackgroundColor(image,exception) == MagickFalse)
{
draw_info=DestroyDrawInfo(draw_info);
image=DestroyImageList(image);
return((Image *) NULL);
}
/*
Draw label.
*/
(void) FormatLocaleString(geometry,MagickPathExtent,"%+g%+g",
draw_info->direction == RightToLeftDirection ? image->columns-
metrics.bounds.x2 : 0.0,draw_info->gravity == UndefinedGravity ?
metrics.ascent : 0.0);
draw_info->geometry=AcquireString(geometry);
status=AnnotateImage(image,draw_info,exception);
if (image_info->pointsize == 0.0)
{
char
pointsize[MagickPathExtent];
(void) FormatLocaleString(pointsize,MagickPathExtent,"%.20g",
draw_info->pointsize);
(void) SetImageProperty(image,"label:pointsize",pointsize,exception);
}
draw_info=DestroyDrawInfo(draw_info);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d P A N G O I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadPANGOImage() reads an image in the Pango Markup Language Format.
%
% The format of the ReadPANGOImage method is:
%
% Image *ReadPANGOImage(const ImageInfo *image_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadPANGOImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
cairo_font_options_t
*font_options;
cairo_surface_t
*surface;
char
*caption,
*property;
cairo_t
*cairo_image;
const char
*option;
DrawInfo
*draw_info;
Image
*image;
MagickBooleanType
status;
PangoAlignment
align;
PangoContext
*context;
PangoFontMap
*fontmap;
PangoGravity
gravity;
PangoLayout
*layout;
PangoRectangle
extent;
PixelInfo
fill_color;
RectangleInfo
page;
register unsigned char
*p;
size_t
stride;
ssize_t
y;
unsigned char
*pixels;
/*
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");
/*
Format caption.
*/
option=GetImageArtifact(image,"filename");
if (option == (const char *) NULL)
property=InterpretImageProperties(image_info,image,image_info->filename,
exception);
else
if (LocaleNCompare(option,"pango:",6) == 0)
property=InterpretImageProperties(image_info,image,option+6,exception);
else
property=InterpretImageProperties(image_info,image,option,exception);
(void) SetImageProperty(image,"caption",property,exception);
property=DestroyString(property);
caption=ConstantString(GetImageProperty(image,"caption",exception));
/*
Get context.
*/
fontmap=pango_cairo_font_map_new();
pango_cairo_font_map_set_resolution(PANGO_CAIRO_FONT_MAP(fontmap),
image->resolution.x == 0.0 ? 90.0 : image->resolution.x);
font_options=cairo_font_options_create();
option=GetImageArtifact(image,"pango:hinting");
if (option != (const char *) NULL)
{
if (LocaleCompare(option,"none") != 0)
cairo_font_options_set_hint_style(font_options,CAIRO_HINT_STYLE_NONE);
if (LocaleCompare(option,"full") != 0)
cairo_font_options_set_hint_style(font_options,CAIRO_HINT_STYLE_FULL);
}
context=pango_font_map_create_context(fontmap);
pango_cairo_context_set_font_options(context,font_options);
cairo_font_options_destroy(font_options);
option=GetImageArtifact(image,"pango: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 NorthWestGravity:
case WestGravity:
case SouthWestGravity:
{
gravity=PANGO_GRAVITY_WEST;
break;
}
case NorthEastGravity:
case EastGravity:
case SouthEastGravity:
{
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=GetImageArtifact(image,"pango: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=GetImageArtifact(image,"pango:auto-dir");
if (option != (const char *) NULL)
pango_layout_set_auto_dir(layout,1);
option=GetImageArtifact(image,"pango: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=GetImageArtifact(image,"pango:justify");
if (IfMagickTrue(IsStringTrue(option)))
pango_layout_set_justify(layout,1);
option=GetImageArtifact(image,"pango:single-paragraph");
if (IfMagickTrue(IsStringTrue(option)))
pango_layout_set_single_paragraph_mode(layout,1);
option=GetImageArtifact(image,"pango: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=GetImageArtifact(image,"pango:indent");
if (option != (const char *) NULL)
pango_layout_set_indent(layout,(int) ((StringToLong(option)*
(image->resolution.x == 0.0 ? 90.0 : image->resolution.x)*PANGO_SCALE+36)/
90.0+0.5));
switch (draw_info->align)
{
case CenterAlign: align=PANGO_ALIGN_CENTER; break;
case RightAlign: align=PANGO_ALIGN_RIGHT; break;
case LeftAlign: align=PANGO_ALIGN_LEFT; break;
default:
{
if (draw_info->gravity == CenterGravity)
{
align=PANGO_ALIGN_CENTER;
break;
}
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);
if (draw_info->font != (char *) NULL)
{
PangoFontDescription
*description;
/*
Set font.
*/
description=pango_font_description_from_string(draw_info->font);
pango_font_description_set_size(description,(int) (PANGO_SCALE*
draw_info->pointsize+0.5));
pango_layout_set_font_description(layout,description);
pango_font_description_free(description);
}
option=GetImageArtifact(image,"pango:markup");
if ((option != (const char *) NULL) && (IsStringTrue(option) == MagickFalse))
pango_layout_set_text(layout,caption,-1);
else
{
GError
*error;
error=(GError *) NULL;
if (pango_parse_markup(caption,-1,0,NULL,NULL,NULL,&error) == 0)
(void) ThrowMagickException(exception,GetMagickModule(),CoderError,
error->message,"`%s'",image_info->filename);
pango_layout_set_markup(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_extents(layout,NULL,&extent);
image->columns=(extent.x+extent.width+PANGO_SCALE/2)/PANGO_SCALE+2*page.x;
}
else
{
image->columns-=2*page.x;
pango_layout_set_width(layout,(int) ((PANGO_SCALE*image->columns*
(image->resolution.x == 0.0 ? 90.0 : image->resolution.x)+45.0)/90.0+
0.5));
}
if (image->rows == 0)
{
pango_layout_get_extents(layout,NULL,&extent);
image->rows=(extent.y+extent.height+PANGO_SCALE/2)/PANGO_SCALE+2*page.y;
}
else
{
image->rows-=2*page.y;
pango_layout_set_height(layout,(int) ((PANGO_SCALE*image->rows*
(image->resolution.y == 0.0 ? 90.0 : image->resolution.y)+45.0)/90.0+
0.5));
}
/*
Render markup.
*/
stride=(size_t) cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32,
image->columns);
pixels=(unsigned char *) AcquireQuantumMemory(image->rows,stride*
sizeof(*pixels));
if (pixels == (unsigned char *) NULL)
{
draw_info=DestroyDrawInfo(draw_info);
caption=DestroyString(caption);
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
}
surface=cairo_image_surface_create_for_data(pixels,CAIRO_FORMAT_ARGB32,
image->columns,image->rows,stride);
cairo_image=cairo_create(surface);
cairo_set_operator(cairo_image,CAIRO_OPERATOR_CLEAR);
cairo_paint(cairo_image);
cairo_set_operator(cairo_image,CAIRO_OPERATOR_OVER);
cairo_translate(cairo_image,page.x,page.y);
pango_cairo_show_layout(cairo_image,layout);
cairo_destroy(cairo_image);
cairo_surface_destroy(surface);
g_object_unref(layout);
g_object_unref(fontmap);
/*
Convert surface to image.
*/
(void) SetImageBackgroundColor(image,exception);
p=pixels;
GetPixelInfo(image,&fill_color);
for (y=0; y < (ssize_t) image->rows; y++)
{
register Quantum
*q;
register ssize_t
x;
q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
if (q == (Quantum *) NULL)
break;
for (x=0; x < (ssize_t) image->columns; x++)
{
double
gamma;
fill_color.blue=(double) ScaleCharToQuantum(*p++);
fill_color.green=(double) ScaleCharToQuantum(*p++);
fill_color.red=(double) ScaleCharToQuantum(*p++);
fill_color.alpha=(double) ScaleCharToQuantum(*p++);
/*
Disassociate alpha.
*/
gamma=1.0-QuantumScale*fill_color.alpha;
gamma=PerceptibleReciprocal(gamma);
fill_color.blue*=gamma;
fill_color.green*=gamma;
fill_color.red*=gamma;
CompositePixelOver(image,&fill_color,fill_color.alpha,q,(double)
GetPixelAlpha(image,q),q);
q+=GetPixelChannels(image);
}
if (SyncAuthenticPixels(image,exception) == MagickFalse)
break;
if (image->previous == (Image *) NULL)
{
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
}
/*
Relinquish resources.
*/
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
draw_info=DestroyDrawInfo(draw_info);
caption=DestroyString(caption);
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d L A B E L I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadLABELImage() reads a LABEL image file and returns it. It
% allocates the memory necessary for the new Image structure and returns a
% pointer to the new image.
%
% The format of the ReadLABELImage method is:
%
% Image *ReadLABELImage(const ImageInfo *image_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadLABELImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
char
geometry[MaxTextExtent],
*property;
const char
*label;
DrawInfo
*draw_info;
Image
*image;
MagickBooleanType
status;
TypeMetric
metrics;
size_t
height,
width;
/*
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);
(void) ResetImagePage(image,"0x0+0+0");
property=InterpretImageProperties(image_info,image,image_info->filename);
(void) SetImageProperty(image,"label",property);
property=DestroyString(property);
label=GetImageProperty(image,"label");
draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
draw_info->text=ConstantString(label);
status=GetMultilineTypeMetrics(image,draw_info,&metrics);
if (image->columns == 0)
{
(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);
(void) status;
image->columns=(size_t) floor(metrics.width+draw_info->stroke_width+0.5);
}
if (image->rows == 0)
{
(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);
image->rows=(size_t) floor(metrics.height+draw_info->stroke_width+0.5);
}
if (image_info->pointsize == 0.0)
{
double
high,
low;
/*
Auto fit text into bounding box.
*/
for ( ; ; draw_info->pointsize*=2.0)
{
(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);
(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) && (height >= image->rows))
break;
if ((width >= (image->columns << 1)) || (height >= (image->rows << 1)))
break;
}
high=draw_info->pointsize/2.0;
for (low=high/2.0; (high-low) > 1.0; )
{
draw_info->pointsize=(low+high)/2.0;
(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);
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) && (height <= image->rows))
low=draw_info->pointsize+1.0;
else
high=draw_info->pointsize-1.0;
}
for (draw_info->pointsize=(low+high)/2.0; (high-low) > 1.0; )
{
(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);
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) && (height <= image->rows))
break;
draw_info->pointsize--;
}
draw_info->pointsize=floor(draw_info->pointsize+0.5);
}
status=GetMultilineTypeMetrics(image,draw_info,&metrics);
if (status == MagickFalse)
{
InheritException(exception,&image->exception);
image=DestroyImageList(image);
return((Image *) NULL);
}
if (draw_info->gravity == UndefinedGravity)
{
(void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
-metrics.bounds.x1+draw_info->stroke_width/2.0,metrics.ascent+
draw_info->stroke_width/2.0);
(void) CloneString(&draw_info->geometry,geometry);
}
if (draw_info->direction == RightToLeftDirection)
{
if (draw_info->direction == RightToLeftDirection)
(void) FormatLocaleString(geometry,MaxTextExtent,"%+g%+g",
image->columns-(metrics.bounds.x2+draw_info->stroke_width/2.0),
metrics.ascent+draw_info->stroke_width/2.0);
(void) CloneString(&draw_info->geometry,geometry);
}
if (SetImageBackgroundColor(image) == MagickFalse)
{
InheritException(exception,&image->exception);
image=DestroyImageList(image);
return((Image *) NULL);
}
(void) AnnotateImage(image,draw_info);
if (image_info->pointsize == 0.0)
{
char
pointsize[MaxTextExtent];
(void) FormatLocaleString(pointsize,MaxTextExtent,"%.20g",
draw_info->pointsize);
(void) SetImageProperty(image,"label:pointsize",pointsize);
}
draw_info=DestroyDrawInfo(draw_info);
return(GetFirstImageInList(image));
}