187 lines
8.1 KiB
C
187 lines
8.1 KiB
C
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% FFFFF DDDD %
|
||
% F D D %
|
||
% FFF D D %
|
||
% F D D %
|
||
% F DDDD %
|
||
% %
|
||
% %
|
||
% Retrieve An Image Via a File Descriptor. %
|
||
% %
|
||
% Software Design %
|
||
% John Cristy %
|
||
% Bill Radcliffe %
|
||
% March 2000 %
|
||
% %
|
||
% %
|
||
% Copyright 1999-2013 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/blob.h"
|
||
#include "magick/blob-private.h"
|
||
#include "magick/constitute.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/module.h"
|
||
#include "magick/pixel-accessor.h"
|
||
#include "magick/quantum-private.h"
|
||
#include "magick/static.h"
|
||
#include "magick/resource_.h"
|
||
#include "magick/string_.h"
|
||
#include "magick/string-private.h"
|
||
#include "magick/utility.h"
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% R e a d F D I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% ReadFDImage retrieves an image via a file descriptor, decodes the image,
|
||
% 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 ReadFDImage method is:
|
||
%
|
||
% Image *ReadFDImage(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 *ReadFDImage(const ImageInfo *image_info,ExceptionInfo *exception)
|
||
{
|
||
Image
|
||
*image;
|
||
|
||
ImageInfo
|
||
*read_info;
|
||
|
||
/*
|
||
Open image file.
|
||
*/
|
||
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);
|
||
read_info=CloneImageInfo(image_info);
|
||
read_info->file=fdopen(StringToLong(image_info->filename),"rb");
|
||
if (read_info->file == (FILE *) NULL)
|
||
{
|
||
ThrowFileException(exception,BlobError,"UnableToOpenBlob",
|
||
image_info->filename);
|
||
return((Image *) NULL);
|
||
}
|
||
*read_info->magick='\0';
|
||
image=ReadImage(read_info,exception);
|
||
(void) fclose(read_info->file);
|
||
read_info=DestroyImageInfo(read_info);
|
||
if (image == (Image *) NULL)
|
||
{
|
||
(void) ThrowMagickException(exception,GetMagickModule(),CoderError,
|
||
"NoDataReturned","`%s'",image_info->filename);
|
||
return((Image *) NULL);
|
||
}
|
||
return(GetFirstImageInList(image));
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% R e g i s t e r F D I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% RegisterFDImage() adds attributes for the FD 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 RegisterFDImage method is:
|
||
%
|
||
% size_t RegisterFDImage(void)
|
||
%
|
||
*/
|
||
ModuleExport size_t RegisterFDImage(void)
|
||
{
|
||
MagickInfo
|
||
*entry;
|
||
|
||
entry=SetMagickInfo("FD");
|
||
entry->decoder=(DecodeImageHandler *) ReadFDImage;
|
||
entry->description=ConstantString("Read image from a file descriptor");
|
||
entry->module=ConstantString("FD");
|
||
entry->stealth=MagickTrue;
|
||
(void) RegisterMagickInfo(entry);
|
||
return(MagickImageCoderSignature);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% U n r e g i s t e r F D I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% UnregisterFDImage() removes format registrations made by the FD module from
|
||
% the list of supported formats.
|
||
%
|
||
% The format of the UnregisterFDImage method is:
|
||
%
|
||
% UnregisterFDImage(void)
|
||
%
|
||
*/
|
||
ModuleExport void UnregisterFDImage(void)
|
||
{
|
||
(void) UnregisterMagickInfo("FD");
|
||
}
|