/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% EEEEE PPPP TTTTT %
% E P P T %
% EEE PPPP T %
% E P T %
% EEEEE P T %
% %
% %
% Read/Write Encapsulated Postscript Format (with preview). %
% %
% 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/blob.h"
#include "magick/blob-private.h"
#include "magick/color.h"
#include "magick/constitute.h"
#include "magick/draw.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/delegate.h"
#include "magick/geometry.h"
#include "magick/image.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/monitor.h"
#include "magick/quantize.h"
#include "magick/resource_.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.h"
#include "magick/transform.h"
#include "magick/utility.h"
/*
Typedef declarations.
*/
typedef struct _EPTInfo
{
unsigned long
magick;
MagickOffsetType
postscript_offset,
tiff_offset;
size_t
postscript_length,
tiff_length;
unsigned char
*postscript,
*tiff;
} EPTInfo;
/*
Forward declarations.
*/
static MagickBooleanType
WriteEPTImage(const ImageInfo *,Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s E P T %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsEPT() returns MagickTrue if the image format type, identified by the
% magick string, is EPT.
%
% The format of the IsEPT method is:
%
% MagickBooleanType IsEPT(const unsigned char *magick,const size_t length)
%
% A description of each parameter follows:
%
% o magick: This string is generally the first few bytes of an image file
% or blob.
%
% o length: Specifies the length of the magick string.
%
*/
static MagickBooleanType IsEPT(const unsigned char *magick,const size_t length)
{
if (length < 4)
return(MagickFalse);
if (memcmp(magick,"\305\320\323\306",4) == 0)
return(MagickTrue);
return(MagickFalse);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d E P T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadEPTImage() reads a binary Postscript 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 ReadEPTImage method is:
%
% Image *ReadEPTImage(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 *ReadEPTImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
EPTInfo
ept_info;
Image
*image;
ImageInfo
*read_info;
ssize_t
count;
MagickBooleanType
status;
MagickOffsetType
offset;
/*
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);
image=AllocateImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
ept_info.magick=ReadBlobLSBLong(image);
if (ept_info.magick != 0xc6d3d0c5ul)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
ept_info.postscript_offset=(MagickOffsetType) ReadBlobLSBLong(image);
ept_info.postscript_length=ReadBlobLSBLong(image);
(void) ReadBlobLSBLong(image);
(void) ReadBlobLSBLong(image);
ept_info.tiff_offset=(MagickOffsetType) ReadBlobLSBLong(image);
ept_info.tiff_length=ReadBlobLSBLong(image);
(void) ReadBlobLSBShort(image);
ept_info.postscript=(unsigned char *) AcquireQuantumMemory(
ept_info.postscript_length,sizeof(*ept_info.postscript));
ept_info.tiff=(unsigned char *) AcquireQuantumMemory(ept_info.tiff_length,
sizeof(*ept_info.tiff));
if ((ept_info.postscript == (unsigned char *) NULL) ||
(ept_info.tiff == (unsigned char *) NULL))
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
offset=SeekBlob(image,ept_info.tiff_offset,SEEK_SET);
if (offset < 0)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
count=ReadBlob(image,ept_info.tiff_length,ept_info.tiff);
if (count != (ssize_t) (ept_info.tiff_length))
ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
offset=SeekBlob(image,ept_info.postscript_offset,SEEK_SET);
if (offset < 0)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
count=ReadBlob(image,ept_info.postscript_length,ept_info.postscript);
if (count != (ssize_t) (ept_info.postscript_length))
ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
CloseBlob(image);
image=DestroyImage(image);
read_info=CloneImageInfo(image_info);
(void) CopyMagickString(read_info->magick,"EPS",MaxTextExtent);
image=BlobToImage(read_info,ept_info.postscript,ept_info.postscript_length,
exception);
if (image == (Image *) NULL)
{
(void) CopyMagickString(read_info->magick,"TIFF",MaxTextExtent);
image=BlobToImage(read_info,ept_info.tiff,ept_info.tiff_length,exception);
}
read_info=DestroyImageInfo(read_info);
if (image != (Image *) NULL)
(void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent);
ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
ept_info.postscript);
return(image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r E P T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterEPTImage() adds attributes for the EPT 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 RegisterEPTImage method is:
%
% unsigned long RegisterEPTImage(void)
%
*/
ModuleExport unsigned long RegisterEPTImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("EPT");
entry->decoder=(DecodeImageHandler *) ReadEPTImage;
entry->encoder=(EncodeImageHandler *) WriteEPTImage;
entry->magick=(IsImageFormatHandler *) IsEPT;
entry->adjoin=MagickFalse;
entry->blob_support=MagickFalse;
entry->description=ConstantString(
"Encapsulated PostScript with TIFF preview");
entry->module=ConstantString("EPT");
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("EPT2");
entry->decoder=(DecodeImageHandler *) ReadEPTImage;
entry->encoder=(EncodeImageHandler *) WriteEPTImage;
entry->magick=(IsImageFormatHandler *) IsEPT;
entry->adjoin=MagickFalse;
entry->blob_support=MagickFalse;
entry->description=ConstantString(
"Encapsulated PostScript Level II with TIFF preview");
entry->module=ConstantString("EPT");
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("EPT3");
entry->decoder=(DecodeImageHandler *) ReadEPTImage;
entry->encoder=(EncodeImageHandler *) WriteEPTImage;
entry->magick=(IsImageFormatHandler *) IsEPT;
entry->blob_support=MagickFalse;
entry->description=ConstantString(
"Encapsulated PostScript Level III with TIFF preview");
entry->module=ConstantString("EPT");
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r E P T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterEPTImage() removes format registrations made by the
% EPT module from the list of supported formats.
%
% The format of the UnregisterEPTImage method is:
%
% UnregisterEPTImage(void)
%
*/
ModuleExport void UnregisterEPTImage(void)
{
(void) UnregisterMagickInfo("EPT");
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e E P T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteEPTImage() writes an image in the Encapsulated Postscript format
% with a TIFF preview.
%
% The format of the WriteEPTImage method is:
%
% MagickBooleanType WriteEPTImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o image_info: The image info.
%
% o image: The image.
%
*/
static MagickBooleanType WriteEPTImage(const ImageInfo *image_info,Image *image)
{
EPTInfo
ept_info;
Image
*write_image;
ImageInfo
*write_info;
MagickBooleanType
status;
/*
Write EPT image.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
if (status == MagickFalse)
return(status);
write_image=CloneImage(image,0,0,MagickTrue,&image->exception);
if (write_image == (Image *) NULL)
return(MagickFalse);
DestroyBlob(write_image);
write_image->blob=CloneBlobInfo((BlobInfo *) NULL);
write_info=CloneImageInfo(image_info);
(void) CopyMagickString(write_info->magick,"EPS",MaxTextExtent);
if (LocaleCompare(image_info->magick,"EPT2") == 0)
(void) CopyMagickString(write_info->magick,"EPS2",MaxTextExtent);
if (LocaleCompare(image_info->magick,"EPT3") == 0)
(void) CopyMagickString(write_info->magick,"EPS3",MaxTextExtent);
(void) ResetMagickMemory(&ept_info,0,sizeof(ept_info));
ept_info.magick=0xc6d3d0c5ul;
ept_info.postscript=(unsigned char *) ImageToBlob(write_info,write_image,
&ept_info.postscript_length,&image->exception);
write_image=DestroyImage(write_image);
write_info=DestroyImageInfo(write_info);
if (ept_info.postscript == (void *) NULL)
return(MagickFalse);
write_image=CloneImage(image,0,0,MagickTrue,&image->exception);
if (write_image == (Image *) NULL)
return(MagickFalse);
DestroyBlob(write_image);
write_image->blob=CloneBlobInfo((BlobInfo *) NULL);
write_info=CloneImageInfo(image_info);
(void) CopyMagickString(write_info->magick,"TIFF",MaxTextExtent);
(void) FormatMagickString(write_info->filename,MaxTextExtent,"tiff:%.1024s",
write_info->filename);
(void) TransformImage(&write_image,(char *) NULL,"512x512>");
if ((write_image->storage_class == DirectClass) ||
(write_image->colors > 256))
{
QuantizeInfo
quantize_info;
/*
EPT preview requires that the image is colormapped.
*/
GetQuantizeInfo(&quantize_info);
quantize_info.dither=IsPaletteImage(write_image,&image->exception) ==
MagickFalse ? MagickTrue : MagickFalse;
(void) QuantizeImage(&quantize_info,write_image);
}
write_image->compression=NoCompression;
ept_info.tiff=(unsigned char *) ImageToBlob(write_info,write_image,
&ept_info.tiff_length,&image->exception);
write_image=DestroyImage(write_image);
write_info=DestroyImageInfo(write_info);
if (ept_info.tiff == (void *) NULL)
{
ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
ept_info.postscript);
return(MagickFalse);
}
/*
Write EPT image.
*/
(void) WriteBlobLSBLong(image,ept_info.magick);
(void) WriteBlobLSBLong(image,30);
(void) WriteBlobLSBLong(image,(unsigned long) ept_info.postscript_length);
(void) WriteBlobLSBLong(image,0);
(void) WriteBlobLSBLong(image,0);
(void) WriteBlobLSBLong(image,(unsigned long) ept_info.postscript_length+30);
(void) WriteBlobLSBLong(image,(unsigned long) ept_info.tiff_length);
(void) WriteBlobLSBShort(image,0xffff);
(void) WriteBlob(image,ept_info.postscript_length,ept_info.postscript);
(void) WriteBlob(image,ept_info.tiff_length,ept_info.tiff);
/*
Relinquish resources.
*/
ept_info.postscript=(unsigned char *) RelinquishMagickMemory(
ept_info.postscript);
ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);
CloseBlob(image);
return(MagickTrue);
}
|
