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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;
- char* 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 );
- }
-