/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% L AAA BBBB EEEEE L %
% L A A B B E L %
% L AAAAA BBBB EEE L %
% L A A B B E L %
% LLLLL A A BBBB EEEEE LLLLL %
% %
% %
% Read ASCII String As An Image. %
% %
% Software Design %
% John Cristy %
% July 1992 %
% %
% %
% Copyright 1999-2007 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. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/annotate.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/draw.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/image.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/property.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.h"
#include "magick/utility.h"
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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];
const char
*label;
DrawInfo
*draw_info;
Image
*image;
MagickBooleanType
status;
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=AllocateImage(image_info);
(void) ResetImagePage(image,"0x0+0+0");
(void) SetImageProperty(image,"label",InterpretImageProperties(image_info,
image,image_info->filename));
label=GetImageProperty(image,"label");
draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
draw_info->text=ConstantString(label);
if ((image->columns != 0) || (image->rows != 0))
{
/*
Fit label to canvas size.
*/
status=GetMultilineTypeMetrics(image,draw_info,&metrics);
for ( ; status != MagickFalse; draw_info->pointsize*=2.0)
{
width=(unsigned long) (metrics.width+draw_info->stroke_width+0.5);
height=(unsigned long) (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=(unsigned long) (metrics.width+draw_info->stroke_width+0.5);
height=(unsigned long) (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=(unsigned long) (metrics.width+draw_info->stroke_width+0.5);
if (image->columns == 0)
image->columns=(unsigned long) (draw_info->pointsize+
draw_info->stroke_width+0.5);
if (draw_info->gravity == UndefinedGravity)
{
(void) FormatMagickString(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=(unsigned long) (metrics.height+draw_info->stroke_width+0.5);
if (image->rows == 0)
image->rows=(unsigned long) (draw_info->pointsize+draw_info->stroke_width+
0.5);
if (SetImageExtent(image,0,0) == MagickFalse)
{
InheritException(exception,&image->exception);
return(DestroyImageList(image));
}
(void) SetImageBackgroundColor(image);
(void) AnnotateImage(image,draw_info);
draw_info=DestroyDrawInfo(draw_info);
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r L A B E L I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterLABELImage() adds properties for the LABEL image format to
% the list of supported formats. The properties include the image format
% tag, a method to read and/or write the format, whether the format
% supports the saving of more than one frame to the same file or blob,
% whether the format supports native in-memory I/O, and a brief
% description of the format.
%
% The format of the RegisterLABELImage method is:
%
% unsigned long RegisterLABELImage(void)
%
*/
ModuleExport unsigned long RegisterLABELImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("LABEL");
entry->decoder=(DecodeImageHandler *) ReadLABELImage;
entry->adjoin=MagickFalse;
entry->description=ConstantString("Image label");
entry->module=ConstantString("LABEL");
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r L A B E L I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterLABELImage() removes format registrations made by the
% LABEL module from the list of supported formats.
%
% The format of the UnregisterLABELImage method is:
%
% UnregisterLABELImage(void)
%
*/
ModuleExport void UnregisterLABELImage(void)
{
(void) UnregisterMagickInfo("LABEL");
}
|
