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/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% SSSSS CCCC TTTTT %
% SS C T %
% SSS C T %
% SS C T %
% SSSSS CCCC T %
% %
% %
% Read/Write ImageMagick Image Format. %
% %
% %
% Software Design %
% John Cristy %
% July 1992 %
% %
% %
% 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"
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 an 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;
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,ReadBinaryType,exception);
if (status == False)
ThrowReaderException(FileOpenWarning,"Unable to open file",image);
/*
Read control block.
*/
(void) ReadBlob(image,80,(char *) buffer);
(void) ReadBlob(image,2,(char *) magick);
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(CorruptImageWarning,"Not a SCT image file",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(CorruptImageWarning,
"only Continuous Tone Picture supported",image);
(void) ReadBlob(image,174,(char *) buffer);
(void) ReadBlob(image,768,(char *) buffer);
/*
Read paramter block.
*/
(void) ReadBlob(image,32,(char *) buffer);
(void) ReadBlob(image,14,(char *) buffer);
image->rows=atol(buffer);
(void) ReadBlob(image,14,(char *) buffer);
image->columns=atol(buffer);
(void) ReadBlob(image,196,(char *) buffer);
(void) ReadBlob(image,768,(char *) buffer);
image->colorspace=CMYKColorspace;
if (image_info->ping)
{
CloseBlob(image);
return(image);
}
/*
Convert SCT raster image to pixel packets.
*/
for (y=0; y < (long) image->rows; y++)
{
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
q->red=(Quantum) (MaxRGB-Upscale(ReadBlobByte(image)));
q++;
}
if ((image->columns % 2) != 0)
(void) ReadBlobByte(image); /* pad */
q=GetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
q->green=(Quantum) (MaxRGB-Upscale(ReadBlobByte(image)));
q++;
}
if ((image->columns % 2) != 0)
(void) ReadBlobByte(image); /* pad */
q=GetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
q->blue=(Quantum) (MaxRGB-Upscale(ReadBlobByte(image)));
q++;
}
if ((image->columns % 2) != 0)
(void) ReadBlobByte(image); /* pad */
q=GetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
q->opacity=(Quantum) (MaxRGB-Upscale(ReadBlobByte(image)));
q++;
}
if (!SyncImagePixels(image))
break;
if ((image->columns % 2) != 0)
(void) ReadBlobByte(image); /* pad */
if (QuantumTick(y,image->rows))
MagickMonitor(LoadImageText,y,image->rows);
}
if (EOFBlob(image))
ThrowReaderException(CorruptImageWarning,"Unexpected end-of-file",image);
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=ReadSCTImage;
entry->magick=IsSCT;
entry->adjoin=False;
entry->description=AcquireString("Scitex HandShake");
entry->module=AcquireString("SCT");
(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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