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/*
% Copyright (C) 2003 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.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% M M TTTTT V V %
% MM MM T V V %
% M M M T V V %
% M M T V V %
% M M T V %
% %
% %
% Read/Write MTV Raytracer Image Format. %
% %
% %
% Software Design %
% John Cristy %
% July 1992 %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
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"
/*
Forward declarations.
*/
static unsigned int
WriteMTVImage(const ImageInfo *,Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d M T V I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method ReadMTVImage reads a MTV 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 ReadMTVImage method is:
%
% Image *ReadMTVImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: Method ReadMTVImage 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 *ReadMTVImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
char
buffer[MaxTextExtent];
Image
*image;
long
count,
y;
register long
x;
register PixelPacket
*q;
register unsigned char
*p;
unsigned char
*pixels;
unsigned int
status;
unsigned long
columns,
rows;
/*
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 MTV image.
*/
(void) ReadBlobString(image,buffer);
columns=0;
rows=0;
count=sscanf(buffer,"%lu %lu\n",&columns,&rows);
if (count != 2)
ThrowReaderException(CorruptImageError,ImproperImageHeader,image);
do
{
size_t
row_size;
/*
Initialize image structure.
*/
image->columns=columns;
image->rows=rows;
image->depth=8;
if (image_info->ping && (image_info->subrange != 0))
if (image->scene >= (image_info->subimage+image_info->subrange-1))
break;
/*
Convert MTV raster image to pixel packets.
*/
pixels=MagickAllocateArray(unsigned char *,image->columns,3);
if (pixels == (unsigned char *) NULL)
ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,image);
row_size=image->columns*3;
for (y=0; y < (long) image->rows; y++)
{
if (ReadBlob(image,row_size,pixels) != row_size)
ThrowReaderException(CorruptImageError,UnexpectedEndOfFile,image);
p=pixels;
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
q->red=ScaleCharToQuantum(*p++);
q->green=ScaleCharToQuantum(*p++);
q->blue=ScaleCharToQuantum(*p++);
q++;
}
if (!SyncImagePixels(image))
break;
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,exception,LoadImageText,
image->filename,
image->columns,image->rows))
break;
}
MagickFreeMemory(pixels);
if (EOFBlob(image))
{
ThrowException(exception,CorruptImageError,UnexpectedEndOfFile,
image->filename);
break;
}
/*
Proceed to next image.
*/
if (image_info->subrange != 0)
if (image->scene >= (image_info->subimage+image_info->subrange-1))
break;
*buffer='\0';
(void) ReadBlobString(image,buffer);
count=sscanf(buffer,"%lu %lu\n",&columns,&rows);
if (count == 2)
{
/*
Allocate next image structure.
*/
AllocateNextImage(image_info,image);
if (image->next == (Image *) NULL)
{
DestroyImageList(image);
return((Image *) NULL);
}
image=SyncNextImageInList(image);
if (!MagickMonitorFormatted(TellBlob(image),GetBlobSize(image),
exception,LoadImagesText,
image->filename))
break;
}
} while (count == 2);
while (image->previous != (Image *) NULL)
image=image->previous;
CloseBlob(image);
return(image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r M T V I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method RegisterMTVImage adds attributes for the MTV 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 RegisterMTVImage method is:
%
% RegisterMTVImage(void)
%
*/
ModuleExport void RegisterMTVImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("MTV");
entry->decoder=(DecoderHandler) ReadMTVImage;
entry->encoder=(EncoderHandler) WriteMTVImage;
entry->description="MTV Raytracing image format";
entry->module="MTV";
entry->coder_class=UnstableCoderClass;
(void) RegisterMagickInfo(entry);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r M T V I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method UnregisterMTVImage removes format registrations made by the
% MTV module from the list of supported formats.
%
% The format of the UnregisterMTVImage method is:
%
% UnregisterMTVImage(void)
%
*/
ModuleExport void UnregisterMTVImage(void)
{
(void) UnregisterMagickInfo("MTV");
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e M T V I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method WriteMTVImage writes an image to a file in red, green, and blue
% MTV rasterfile format.
%
% The format of the WriteMTVImage method is:
%
% unsigned int WriteMTVImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o status: Method WriteMTVImage 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 WriteMTVImage(const ImageInfo *image_info,Image *image)
{
char
buffer[MaxTextExtent];
int
y;
register const PixelPacket
*p;
register long
x;
register unsigned char
*q;
unsigned char
*pixels;
unsigned int
status;
unsigned long
scene;
/*
Open output image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
if (status == False)
ThrowWriterException(FileOpenError,UnableToOpenFile,image);
scene=0;
do
{
/*
Allocate memory for pixels.
*/
(void) TransformColorspace(image,RGBColorspace);
pixels=MagickAllocateMemory(unsigned char *,
image->columns*sizeof(PixelPacket));
if (pixels == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,MemoryAllocationFailed,image);
/*
Initialize raster file header.
*/
FormatString(buffer,"%lu %lu\n",image->columns,image->rows);
(void) WriteBlobString(image,buffer);
for (y=0; y < (long) image->rows; y++)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
q=pixels;
for (x=0; x < (long) image->columns; x++)
{
*q++=ScaleQuantumToChar(p->red);
*q++=ScaleQuantumToChar(p->green);
*q++=ScaleQuantumToChar(p->blue);
p++;
}
(void) WriteBlob(image,q-pixels,(char *) pixels);
if (image->previous == (Image *) NULL)
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,&image->exception,
SaveImageText,image->filename,
image->columns,image->rows))
break;
}
MagickFreeMemory(pixels);
if (image->next == (Image *) NULL)
break;
image=SyncNextImageInList(image);
status=MagickMonitorFormatted(scene++,GetImageListLength(image),
&image->exception,SaveImagesText,
image->filename);
if (status == False)
break;
} while (image_info->adjoin);
if (image_info->adjoin)
while (image->previous != (Image *) NULL)
image=image->previous;
CloseBlob(image);
return(True);
}
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