/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% AAA V V SSSSS %
% A A V V SS %
% AAAAA V V SSS %
% A A V V SS %
% A A V SSSSS %
% %
% %
% Read/Write ImageMagick Image Format. %
% %
% %
% Software Design %
% John Cristy %
% July 1992 %
% %
% %
% Copyright (C) 2001 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 "defines.h"
/*
Forward declarations.
*/
static unsigned int
WriteAVSImage(const ImageInfo *,Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d A V S I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method ReadAVSImage reads an AVS 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 ReadAVSImage method is:
%
% Image *ReadAVSImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: Method ReadAVSImage 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 *ReadAVSImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
Image
*image;
int
y;
register int
x;
register PixelPacket
*q;
register unsigned char
*p;
unsigned char
*pixels;
unsigned int
status;
unsigned long
height,
width;
/*
Open image file.
*/
image=AllocateImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryType);
if (status == False)
ThrowReaderException(FileOpenWarning,"Unable to open file",image);
/*
Read AVS image.
*/
width=ReadBlobMSBLong(image);
height=ReadBlobMSBLong(image);
if ((width == (unsigned long) ~0) || (height == (unsigned long) ~0))
ThrowReaderException(CorruptImageWarning,"Not a AVS image file",image);
do
{
/*
Initialize image structure.
*/
image->columns=width;
image->rows=height;
image->depth=8;
if (image_info->ping)
{
CloseBlob(image);
return(image);
}
/*
Convert AVS raster image to pixel packets.
*/
pixels=(unsigned char *) AcquireMemory(4*image->columns);
if (pixels == (unsigned char *) NULL)
ThrowReaderException(CorruptImageWarning,"Unable to allocate memory",
image);
for (y=0; y < (int) image->rows; y++)
{
status=ReadBlob(image,4*image->columns,pixels);
if (status == False)
ThrowReaderException(CorruptImageWarning,"Unable to read image data",
image);
p=pixels;
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (int) image->columns; x++)
{
q->opacity=MaxRGB-UpScale(*p++);
q->red=UpScale(*p++);
q->green=UpScale(*p++);
q->blue=UpScale(*p++);
image->matte|=(q->opacity != OpaqueOpacity);
q++;
}
if (!SyncImagePixels(image))
break;
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
MagickMonitor(LoadImageText,y,image->rows);
}
LiberateMemory((void **) &pixels);
/*
Proceed to next image.
*/
if (image_info->subrange != 0)
if (image->scene >= (image_info->subimage+image_info->subrange-1))
break;
width=ReadBlobMSBLong(image);
height=ReadBlobMSBLong(image);
if ((width != (unsigned long) ~0) && (height != (unsigned long) ~0))
{
/*
Allocate next image structure.
*/
AllocateNextImage(image_info,image);
if (image->next == (Image *) NULL)
{
DestroyImages(image);
return((Image *) NULL);
}
image=image->next;
MagickMonitor(LoadImagesText,TellBlob(image),image->filesize);
}
} while ((width != (unsigned long) ~0) && (height != (unsigned long) ~0));
while (image->previous != (Image *) NULL)
image=image->previous;
CloseBlob(image);
return(image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r A V S I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method RegisterAVSImage adds attributes for the AVS 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 RegisterAVSImage method is:
%
% RegisterAVSImage(void)
%
*/
ModuleExport void RegisterAVSImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("AVS");
entry->decoder=ReadAVSImage;
entry->encoder=WriteAVSImage;
entry->description=AllocateString("AVS X image");
entry->module=AllocateString("AVS");
RegisterMagickInfo(entry);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r A V S I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method UnregisterAVSImage removes format registrations made by the
% AVS module from the list of supported formats.
%
% The format of the UnregisterAVSImage method is:
%
% UnregisterAVSImage(void)
%
*/
ModuleExport void UnregisterAVSImage(void)
{
UnregisterMagickInfo("AVS");
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e A V S I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method WriteAVSImage writes an image to a file in AVS X image format.
%
% The format of the WriteAVSImage method is:
%
% unsigned int WriteAVSImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o status: Method WriteAVSImage 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 an ImageInfo structure.
%
% o image: A pointer to a Image structure.
%
%
*/
static unsigned int WriteAVSImage(const ImageInfo *image_info,Image *image)
{
register int
x,
y;
register PixelPacket
*p;
register unsigned char
*q;
unsigned char
*pixels;
unsigned int
scene,
status;
/*
Open output image file.
*/
status=OpenBlob(image_info,image,WriteBinaryType);
if (status == False)
ThrowWriterException(FileOpenWarning,"Unable to open file",image);
scene=0;
do
{
/*
Write AVS header.
*/
TransformRGBImage(image,RGBColorspace);
WriteBlobMSBLong(image,image->columns);
WriteBlobMSBLong(image,image->rows);
/*
Allocate memory for pixels.
*/
pixels=(unsigned char *) AcquireMemory(image->columns*sizeof(PixelPacket));
if (pixels == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitWarning,"Memory allocation failed",
image);
/*
Convert MIFF to AVS raster pixels.
*/
for (y=0; y < (int) image->rows; y++)
{
p=GetImagePixels(image,0,y,image->columns,1);
if (p == (PixelPacket *) NULL)
break;
q=pixels;
for (x=0; x < (int) image->columns; x++)
{
*q++=MaxRGB-DownScale((image->matte ? p->opacity : OpaqueOpacity));
*q++=DownScale(p->red);
*q++=DownScale(p->green);
*q++=DownScale(p->blue);
p++;
}
(void) WriteBlob(image,q-pixels,(char *) pixels);
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
MagickMonitor(SaveImageText,y,image->rows);
}
LiberateMemory((void **) &pixels);
if (image->next == (Image *) NULL)
break;
image=GetNextImage(image);
MagickMonitor(SaveImagesText,scene++,GetNumberScenes(image));
} while (image_info->adjoin);
if (image_info->adjoin)
while (image->previous != (Image *) NULL)
image=image->previous;
CloseBlob(image);
return(True);
}
