/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 %
% %
% %
% 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/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/monitor.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.h"
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s S C T %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsSCT() returns MagickTrue if the image format type, identified by the
% magick string, is SCT.
%
% The format of the IsSCT method is:
%
% MagickBooleanType IsSCT(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 IsSCT(const unsigned char *magick,const size_t length)
{
if (length < 2)
return(MagickFalse);
if (LocaleNCompare((char *) magick,"CT",2) == 0)
return(MagickTrue);
return(MagickFalse);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d S C T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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_info: The image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadSCTImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
char
magick[2];
Image
*image;
long
y;
MagickBooleanType
status;
MagickRealType
height,
width;
register IndexPacket
*indexes;
register long
x;
register PixelPacket
*q;
ssize_t
count;
unsigned char
buffer[768];
unsigned long
separations,
separations_mask,
units;
/*
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);
}
/*
Read control block.
*/
count=ReadBlob(image,80,buffer);
count=ReadBlob(image,2,(unsigned 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(CorruptImageError,"ImproperImageHeader");
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");
count=ReadBlob(image,174,buffer);
count=ReadBlob(image,768,buffer);
/*
Read paramter block.
*/
units=1UL*ReadBlobByte(image);
if (units == 0)
image->units=PixelsPerCentimeterResolution;
separations=1UL*ReadBlobByte(image);
separations_mask=ReadBlobMSBShort(image);
count=ReadBlob(image,14,buffer);
buffer[14]='\0';
height=atof((char *) buffer);
count=ReadBlob(image,14,buffer);
width=atof((char *) buffer);
count=ReadBlob(image,12,buffer);
buffer[12]='\0';
image->rows=1UL*atol((char *) buffer);
count=ReadBlob(image,12,buffer);
image->columns=1UL*atol((char *) buffer);
count=ReadBlob(image,200,buffer);
count=ReadBlob(image,768,buffer);
if (separations_mask == 0x0f)
image->colorspace=CMYKColorspace;
image->x_resolution=1.0*image->columns/width;
image->y_resolution=1.0*image->rows/height;
if (image_info->ping != MagickFalse)
{
CloseBlob(image);
return(GetFirstImageInList(image));
}
if (SetImageExtent(image,0,0) == MagickFalse)
{
InheritException(exception,&image->exception);
return(DestroyImageList(image));
}
/*
Convert SCT raster image to pixel packets.
*/
for (y=0; y < (long) image->rows; y++)
{
q=GetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
q->red=(Quantum) ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
q++;
}
if (SyncImagePixels(image) == MagickFalse)
break;
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) ScaleCharToQuantum((unsigned char)
ReadBlobByte(image));
q++;
}
if (SyncImagePixels(image) == MagickFalse)
break;
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) ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
q++;
}
if (SyncImagePixels(image) == MagickFalse)
break;
if ((image->columns % 2) != 0)
(void) ReadBlobByte(image); /* pad */
if (image->colorspace == CMYKColorspace)
{
q=GetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
indexes=GetIndexes(image);
for (x=0; x < (long) image->columns; x++)
{
q->red=(Quantum) QuantumRange-q->red;
q->green=(Quantum) QuantumRange-q->green;
q->blue=(Quantum) QuantumRange-q->blue;
indexes[x]=(IndexPacket) (QuantumRange-ScaleCharToQuantum(
(unsigned char) ReadBlobByte(image)));
q++;
}
if (SyncImagePixels(image) == MagickFalse)
break;
if ((image->columns % 2) != 0)
(void) ReadBlobByte(image); /* pad */
}
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(LoadImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
if (EOFBlob(image) != MagickFalse)
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
image->filename);
CloseBlob(image);
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r S C T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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:
%
% unsigned long RegisterSCTImage(void)
%
*/
ModuleExport unsigned long RegisterSCTImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("SCT");
entry->decoder=(DecodeImageHandler *) ReadSCTImage;
entry->magick=(IsImageFormatHandler *) IsSCT;
entry->adjoin=MagickFalse;
entry->description=ConstantString("Scitex HandShake");
entry->module=ConstantString("SCT");
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r S C T I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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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