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DEFINITIONS
This source file includes following definitions.
- ReadARTImage
- WriteARTImage
- RegisterARTImage
- UnregisterARTImage
/*
% Copyright (C) 2003 GraphicsMagick Group
% Copyright (C) 2002 ImageMagick Studio
%
% 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.
%
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% AAA RRRR TTTTT %
% A A R R T %
% AAAAA RRRR T %
% A A R R T %
% A A R R T %
% %
% %
% Read/Write PFS: 1st Publisher Image Format. %
% %
% %
% Software Design %
% Jaroslav Fojtik %
% January 2001 - 2007 %
% %
% %
% %
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%
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/colormap.h"
#include "magick/constitute.h"
#include "magick/log.h"
#include "magick/magick.h"
#include "magick/monitor.h"
#include "magick/pixel_cache.h"
#include "magick/utility.h"
/*
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% R e a d A R T I m a g e %
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% Method ReadARTImage reads an ART X 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 ReadARTImage method is:
%
% Image *ReadARTImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: Method ReadARTImage 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 *ReadARTImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
Image *image;
int i;
unsigned width,height,dummy;
long ldblk;
unsigned char *BImgBuff=NULL;
unsigned char Padding;
unsigned int status;
const PixelPacket *q;
/*
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 ART image.
*/
dummy=ReadBlobLSBShort(image);
width=ReadBlobLSBShort(image);
dummy=ReadBlobLSBShort(image);
height=ReadBlobLSBShort(image);
ldblk=(long) ((width+7) / 8);
Padding=(unsigned char) ((-ldblk) & 0x01);
if(GetBlobSize(image)!=(8+((long)ldblk+Padding)*height))
ThrowReaderException(CorruptImageError,ImproperImageHeader,image);
image->columns=width;
image->rows=height;
image->depth=1;
image->colors=1l << image->depth;
/* printf("ART header checked OK %d,%d\n",image->colors,image->depth); */
if (!AllocateImageColormap(image,image->colors)) goto NoMemory;
/* If ping is true, then only set image size and colors without reading any image data. */
if (image_info->ping) goto DONE_READING;
/* ----- Load RLE compressed raster ----- */
BImgBuff=MagickAllocateMemory(unsigned char *,((size_t) ldblk)); /*Ldblk was set in the check phase*/
if(BImgBuff==NULL)
NoMemory:
ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,image);
for(i=0; i<(int)height; i++)
{
(void) ReadBlob(image,(size_t)ldblk,(char *)BImgBuff);
(void) ReadBlob(image,Padding,(char *)&dummy);
q=SetImagePixels(image,0,i,image->columns,1);
if (q == (PixelPacket *)NULL) break;
(void)ImportImagePixelArea(image,GrayQuantum,1,BImgBuff,NULL,0);
if (!SyncImagePixels(image)) break;
}
if(BImgBuff!=NULL)
MagickFreeMemory(BImgBuff);
if (EOFBlob(image))
ThrowException(exception,CorruptImageError,UnexpectedEndOfFile,
image->filename);
DONE_READING:
CloseBlob(image);
return(image);
}
/*
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% W r i t e A R T I m a g e %
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% Function WriteARTImage writes an ART image to a file.
%
% The format of the WriteARTImage method is:
%
% unsigned int WriteARTImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o status: Function WriteARTImage return True if the image is written.
% False is returned is there is a memory shortage or if the image file
% fails to write.
%
% o image_info: Specifies a pointer to a ImageInfo structure.
%
% o image: A pointer to an Image structure.
%
*/
static unsigned int WriteARTImage(const ImageInfo *image_info,Image *image)
{
long y;
unsigned dummy = 0;
long DataSize;
const PixelPacket *q;
unsigned int status;
unsigned char Padding;
int logging;
unsigned char *pixels;
/*
Open output image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
logging=LogMagickEvent(CoderEvent,GetMagickModule(),"enter ART");
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
if (status == False)
ThrowWriterException(FileOpenError,UnableToOpenFile,image);
DataSize = (long)((image->columns+7) / 8);
Padding = (unsigned char)((-DataSize) & 0x01);
pixels=MagickAllocateMemory(unsigned char *,(size_t) (DataSize));
if (pixels == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,MemoryAllocationFailed,image);
/*
Write ART hader.
*/
(void) WriteBlobLSBShort(image,0);
(void) WriteBlobLSBShort(image,image->columns);
(void) WriteBlobLSBShort(image,0);
(void) WriteBlobLSBShort(image,image->rows);
/*
Store image data.
*/
for(y=0; y<(long)image->rows; y++)
{
q = AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
(void)ExportImagePixelArea(image,GrayQuantum,1,pixels,0,0);
(void)WriteBlob(image,DataSize,pixels);
(void)WriteBlob(image,Padding,(char *)&dummy);
}
status=True;
CloseBlob(image);
MagickFreeMemory(pixels);
if (logging)
(void)LogMagickEvent(CoderEvent,GetMagickModule(),"return ART");
return(status);
}
/*
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% R e g i s t e r A R T I m a g e %
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% Method RegisterARTImage adds attributes for the ART 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 RegisterARTImage method is:
%
% RegisterARTImage(void)
%
*/
ModuleExport void RegisterARTImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("ART");
entry->decoder = (DecoderHandler)ReadARTImage;
entry->encoder = (EncoderHandler)WriteARTImage;
entry->description="PFS: 1st Publisher";
entry->module="ART";
(void) RegisterMagickInfo(entry);
}
/*
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% U n r e g i s t e r A R T I m a g e %
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% Method UnregisterARTImage removes format registrations made by the
% ART module from the list of supported formats.
%
% The format of the UnregisterARTImage method is:
%
% UnregisterARTImage(void)
%
*/
ModuleExport void UnregisterARTImage(void)
{
(void) UnregisterMagickInfo("ART");
}