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/* pnmtile.c - replicate a portable anymap into a specified size
**
** 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 "pnm.h"
int
main( argc, argv )
int argc;
char* argv[];
{
FILE* ifp;
xel** xels;
register xel* xelrow;
xelval maxval;
int rows, cols, format, width, height, row, col;
const char* const usage = "width height [pnmfile]";
pnm_init( &argc, argv );
if ( argc < 3 || argc > 4 )
pm_usage( usage );
if ( sscanf( argv[1], "%d", &width ) != 1 )
pm_usage( usage );
if ( sscanf( argv[2], "%d", &height ) != 1 )
pm_usage( usage );
if ( width < 1 )
pm_error( "width is less than 1" );
if ( height < 1 )
pm_error( "height is less than 1" );
if ( argc == 4 )
ifp = pm_openr( argv[3] );
else
ifp = stdin;
xels = pnm_readpnm( ifp, &cols, &rows, &maxval, &format );
pm_close( ifp );
xelrow = pnm_allocrow( width );
pnm_writepnminit( stdout, width, height, maxval, format, 0 );
for ( row = 0; row < height; ++row )
{
for ( col = 0; col < width; ++col )
xelrow[col] = xels[row % rows][col % cols];
pnm_writepnmrow( stdout, xelrow, width, maxval, format, 0 );
}
pm_close( stdout );
exit( 0 );
}
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