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/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% CCCC AAA PPPP TTTTT IIIII OOO N N %
% C A A P P T I O O NN N %
% C AAAAA PPPP T I O O N N N %
% C A A P T I O O N NN %
% CCCC A A P T IIIII OOO N N %
% %
% %
% Read/Write ImageMagick Image Format. %
% %
% %
% Software Design %
% John Cristy %
% February 2002 %
% %
% %
% Copyright (C) 2002 ImageMagick Studio, a non-profit organization dedicated %
% to making software imaging solutions freely available. %
% %
% Permission is hereby granted, free of charge, to any person obtaining a %
% copy of this software and associated documentation files ("ImageMagick"), %
% to deal in ImageMagick without restriction, including without limitation %
% the rights to use, copy, modify, merge, publish, distribute, sublicense, %
% and/or sell copies of ImageMagick, and to permit persons to whom the %
% ImageMagick is furnished to do so, subject to the following conditions: %
% %
% The above copyright notice and this permission notice shall be included in %
% all copies or substantial portions of ImageMagick. %
% %
% The software is provided "as is", without warranty of any kind, express or %
% implied, including but not limited to the warranties of merchantability, %
% fitness for a particular purpose and noninfringement. In no event shall %
% ImageMagick Studio be liable for any claim, damages or other liability, %
% whether in an action of contract, tort or otherwise, arising from, out of %
% or in connection with ImageMagick or the use or other dealings in %
% ImageMagick. %
% %
% Except as contained in this notice, the name of the ImageMagick Studio %
% shall not be used in advertising or otherwise to promote the sale, use or %
% other dealings in ImageMagick without prior written authorization from the %
% ImageMagick Studio. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
Include declarations.
*/
#include "magick.h"
#include "define.h"
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d C A P T I O N I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method 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: Method ReadCAPTIONImage returns a pointer to the image after
% reading. A null image is returned if there is a memory shortage or
% if the image cannot be read.
%
% o image_info: Specifies a pointer to an ImageInfo structure.
%
% o exception: return any errors or warnings in this structure.
%
%
*/
static Image *ReadCAPTIONImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
char
*caption,
geometry[MaxTextExtent];
DrawInfo
*draw_info;
Image
*image;
register char
*p,
*q;
register int
i;
TypeMetric
metrics;
unsigned int
status;
/*
Initialize Image structure.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
image=AllocateImage(image_info);
if (image->columns == 0)
ThrowReaderException(OptionWarning,"Must specify image size",image);
if (*image_info->filename != '@')
caption=AllocateString(image_info->filename);
else
{
unsigned long
length;
/*
Read caption.
*/
(void) strncpy(image->filename,image_info->filename+1,MaxTextExtent-2);
status=OpenBlob(image_info,image,ReadBinaryType,exception);
if (status == False)
ThrowReaderException(FileOpenWarning,"Unable to open file",image);
length=MaxTextExtent;
caption=(char *) AcquireMemory(length);
p=caption;
if (caption != (char *) NULL)
while (ReadBlobString(image,p) != (char *) NULL)
{
p+=strlen(p);
if ((p-caption+MaxTextExtent+1) < (long) length)
continue;
length<<=1;
ReacquireMemory((void **) &caption,length);
if (caption == (char *) NULL)
break;
p=caption+strlen(caption);
}
if (caption == (char *) NULL)
ThrowReaderException(ResourceLimitWarning,"Memory allocation failed",
image);
CloseBlob(image);
}
/*
Format caption.
*/
draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
draw_info->text=AllocateString(caption);
p=caption;
q=draw_info->text;
for (i=0; *p != '\0'; p++)
{
*q++=(*p);
*q='\0';
status=GetTypeMetrics(image,draw_info,&metrics);
if (status == False)
ThrowReaderException(DelegateWarning,"Unable to get type metrics",image);
if ((metrics.width+metrics.max_advance/2) < image->columns)
continue;
for (p--; !isspace((int) *p) && (p > caption); p--);
*p++='\n';
q=draw_info->text;
i++;
}
if (image->rows == 0)
image->rows=(unsigned long) ((i+1)*(metrics.ascent-metrics.descent));
SetImage(image,OpaqueOpacity);
/*
Draw caption.
*/
(void) strcpy(draw_info->text,caption);
FormatString(geometry,"+%g+%g",metrics.max_advance/4,metrics.ascent);
draw_info->geometry=AllocateString(geometry);
(void) AnnotateImage(image,draw_info);
DestroyDrawInfo(draw_info);
LiberateMemory((void **) &caption);
return(image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r C A P T I O N I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method RegisterCAPTIONImage adds attributes for the CAPTION image format to
% the list of supported formats. The attributes 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 RegisterCAPTIONImage method is:
%
% RegisterCAPTIONImage(void)
%
*/
ModuleExport void RegisterCAPTIONImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("CAPTION");
entry->decoder=ReadCAPTIONImage;
entry->adjoin=False;
entry->description=AcquireString("Image caption");
entry->module=AcquireString("CAPTION");
(void) RegisterMagickInfo(entry);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r C A P T I O N I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method UnregisterCAPTIONImage removes format registrations made by the
% CAPTION module from the list of supported formats.
%
% The format of the UnregisterCAPTIONImage method is:
%
% UnregisterCAPTIONImage(void)
%
*/
ModuleExport void UnregisterCAPTIONImage(void)
{
(void) UnregisterMagickInfo("CAPTION");
}
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