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Club Amiga de Montreal - CAM
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PBM_PLUS
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ppm
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mtvtoppm.c
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C/C++ Source or Header
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1980-12-04
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/* mtvtoppm.c - read an MTV ray-tracer output file and produce a portable pixmap
**
** Copyright (C) 1989 by Jef Poskanzer.
**
** Permission to use, copy, modify, and distribute this software and its
** documentation for any purpose and without fee is hereby granted, provided
** that the above copyright notice appear in all copies and that both that
** copyright notice and this permission notice appear in supporting
** documentation. This software is provided "as is" without express or
** implied warranty.
*/
#include <stdio.h>
#include "ppm.h"
main( argc, argv )
int argc;
char *argv[];
{
FILE *ifd;
register pixel *pixelrow, *pP;
int rows, cols, row, col;
pixval maxval;
unsigned char buf[3];
pm_progname = argv[0];
if ( argc > 2 )
pm_usage( "[mtvfile]" );
if ( argc == 2 )
ifd = pm_openr( argv[1] );
else
ifd = stdin;
/* Read in the MTV file. First the header. */
if ( fscanf( ifd, "%d%d\n", &cols, &rows ) != 2 )
pm_error( "unable to read MTV file header", 0,0,0,0,0 );
if ( cols <= 0 || rows <= 0 )
pm_error( "invalid size: %d %d", cols, rows, 0,0,0 );
maxval = 255;
ppm_writeppminit( stdout, cols, rows, maxval );
pixelrow = ppm_allocrow( cols );
for ( row = 0; row < rows; row++ )
{
for ( col = 0, pP = pixelrow; col < cols; col++, pP++ )
{
if ( fread( buf, sizeof(buf), 1, ifd ) != 1 )
pm_error( "premature EOF", 0,0,0,0,0 );
PPM_ASSIGN( *pP, buf[0], buf[1], buf[2] );
}
ppm_writeppmrow( stdout, pixelrow, cols, maxval );
}
pm_close( ifd );
exit( 0 );
}