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/*
% Copyright (C) 2003-2016 GraphicsMagick Group
% Copyright (C) 2002 ImageMagick Studio
% Copyright 1991-1999 E. I. du Pont de Nemours and Company
%
% This program is covered by multiple licenses, which are described in
% Copyright.txt. You should have received a copy of Copyright.txt with this
% package; otherwise see http://www.graphicsmagick.org/www/Copyright.html.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% SSSSS CCCC TTTTT %
% SS C T %
% SSS C T %
% SS C T %
% SSSSS CCCC T %
% %
% %
% Read Scitex HandShake Image Format. %
% %
% %
% Software Design %
% John Cristy %
% July 1992 %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
The Scitex HandShake data format is specified in the document
HandShake Foreign File Transfer Protocol, Scitex Corporation, Ltd.,
Revision A: April 1988, Document No. 788-37898A, Catalog No. 399Z37898
http://www.oreilly.com/www/centers/gff/formats/scitex
/
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/pixel_cache.h"
#include "magick/magick.h"
#include "magick/monitor.h"
#include "magick/utility.h"
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s S C T %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method IsSCT returns True if the image format type, identified by the
% magick string, is SCT.
%
% The format of the IsSCT method is:
%
% unsigned int IsSCT(const unsigned char *magick,const size_t length)
%
% A description of each parameter follows:
%
% o status: Method IsSCT returns True if the image format type is SCT.
%
% 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 unsigned int IsSCT(const unsigned char *magick,const size_t length)
{
if (length < 2)
return(False);
if (LocaleNCompare((char *) magick,"CT",2) == 0)
return(True);
return(False);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d S C T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method ReadSCTImage reads a Scitex 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 ReadSCTImage method is:
%
% Image *ReadSCTImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: Method ReadSCTImage 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 a ImageInfo structure.
%
% o exception: return any errors or warnings in this structure.
%
%
*/
static Image *ReadSCTImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
char
buffer[768],
magick[2];
Image
*image;
long
y;
register long
x;
register PixelPacket
*q;
int
c;
unsigned int
status;
/*
Open image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
image=AllocateImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == False)
ThrowReaderException(FileOpenError,UnableToOpenFile,image);
/*
Read control block.
*/
do
{
if (ReadBlob(image,80,(char *) buffer) != 80)
break;
if (ReadBlob(image,2,(char *) magick) != 2)
break;
if ((LocaleNCompare((char *) magick,"CT",2) != 0) &&
(LocaleNCompare((char *) magick,"LW",2) != 0) &&
(LocaleNCompare((char *) magick,"BM",2) != 0) &&
(LocaleNCompare((char *) magick,"PG",2) != 0) &&
(LocaleNCompare((char *) magick,"TX",2) != 0))
ThrowReaderException(CorruptImageError,ImproperImageHeader,image);
if ((LocaleNCompare((char *) magick,"LW",2) == 0) ||
(LocaleNCompare((char *) magick,"BM",2) == 0) ||
(LocaleNCompare((char *) magick,"PG",2) == 0) ||
(LocaleNCompare((char *) magick,"TX",2) == 0))
ThrowReaderException(CoderError,OnlyContinuousTonePictureSupported,image);
if (ReadBlob(image,174,(char *) buffer) != 174)
break;
if (ReadBlob(image,768,(char *) buffer) != 768)
break;
/*
Read parameter block.
*/
if (ReadBlob(image,32,(char *) buffer) != 32)
break;
if (ReadBlob(image,14,(char *) buffer) != 14)
break;
buffer[14]='\0';
image->rows=MagickAtoL(buffer) & 0x7FFFFFFF;
if (ReadBlob(image,14,(char *) buffer) != 14)
break;
buffer[14]='\0';
image->columns=MagickAtoL(buffer) & 0x7FFFFFFF;
if (ReadBlob(image,196,(char *) buffer) != 196)
break;
if (ReadBlob(image,768,(char *) buffer) != 768)
break;
image->colorspace=CMYKColorspace;
}
while (0);
if (EOFBlob(image))
ThrowReaderException(CorruptImageError,UnexpectedEndOfFile,image);
if (image_info->ping)
{
CloseBlob(image);
return(image);
}
if (CheckImagePixelLimits(image, exception) != MagickPass)
ThrowReaderException(ResourceLimitError,ImagePixelLimitExceeded,image);
/*
Convert SCT raster image to pixel packets.
*/
for (y=0; y < (long) image->rows; y++)
{
q=SetImagePixelsEx(image,0,y,image->columns,1,exception);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
if ((c = ReadBlobByte(image)) == EOF)
break;
q->red=(Quantum) (MaxRGB-ScaleCharToQuantum(c));
q++;
}
if ((image->columns % 2) != 0)
if (ReadBlobByte(image) == EOF) /* pad */
break;
q=GetImagePixelsEx(image,0,y,image->columns,1,exception);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
if ((c = ReadBlobByte(image)) == EOF)
break;
q->green=(Quantum) (MaxRGB-ScaleCharToQuantum(c));
q++;
}
if ((image->columns % 2) != 0)
if (ReadBlobByte(image) == EOF) /* pad */
break;
q=GetImagePixelsEx(image,0,y,image->columns,1,exception);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
if ((c = ReadBlobByte(image)) == EOF)
break;
q->blue=(Quantum) (MaxRGB-ScaleCharToQuantum(c));
q++;
}
if ((image->columns % 2) != 0)
if (ReadBlobByte(image) == EOF) /* pad */
break;
q=GetImagePixelsEx(image,0,y,image->columns,1,exception);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
if ((c = ReadBlobByte(image)) == EOF)
break;
q->opacity=(Quantum) (MaxRGB-ScaleCharToQuantum(c));
q++;
}
if (!SyncImagePixelsEx(image,exception))
break;
if ((image->columns % 2) != 0)
if (ReadBlobByte(image) == EOF) /* pad */
break;
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,exception,LoadImageText,
image->filename,
image->columns,image->rows))
break;
if (EOFBlob(image))
break;
}
if (EOFBlob(image))
ThrowException(exception,CorruptImageError,UnexpectedEndOfFile,
image->filename);
CloseBlob(image);
return(image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r S C T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method RegisterSCTImage adds attributes for the SCT 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 RegisterSCTImage method is:
%
% RegisterSCTImage(void)
%
*/
ModuleExport void RegisterSCTImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("SCT");
entry->decoder=(DecoderHandler) ReadSCTImage;
entry->magick=(MagickHandler) IsSCT;
entry->adjoin=False;
entry->description="Scitex HandShake";
entry->module="SCT";
entry->coder_class=UnstableCoderClass;
(void) RegisterMagickInfo(entry);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r S C T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method UnregisterSCTImage removes format registrations made by the
% SCT module from the list of supported formats.
%
% The format of the UnregisterSCTImage method is:
%
% UnregisterSCTImage(void)
%
*/
ModuleExport void UnregisterSCTImage(void)
{
(void) UnregisterMagickInfo("SCT");
}
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