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- /* pnmenlarge.c - read a portable anymap and enlarge it N times
- **
- ** 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* xelrow;
- xel* newxelrow;
- register xel *xP;
- register xel *nxP;
- int argn, n, rows, cols, format, row;
- register int col, subrow, subcol;
- xelval maxval;
- char* usage = "N [pnmfile]";
-
- pnm_init( &argc, argv );
-
- argn = 1;
-
- if ( argn == argc )
- pm_usage( usage );
- if ( sscanf( argv[argn], "%d", &n ) != 1 )
- pm_usage( usage );
- if ( n < 2 )
- pm_error( "N must be greater than 1" );
- ++argn;
-
- if ( argn != argc )
- {
- ifp = pm_openr( argv[argn] );
- ++argn;
- }
- else
- ifp = stdin;
-
- if ( argn != argc )
- pm_usage( usage );
-
- pnm_readpnminit( ifp, &cols, &rows, &maxval, &format );
- xelrow = pnm_allocrow( cols );
- pnm_writepnminit( stdout, cols * n, rows * n, maxval, format, 0 );
- newxelrow = pnm_allocrow( cols * n );
-
- for ( row = 0; row < rows; ++row )
- {
- pnm_readpnmrow( ifp, xelrow, cols, maxval, format );
- for ( subrow = 0; subrow < n; ++subrow )
- {
- for ( col = 0, xP = xelrow; col < cols; ++col, ++xP )
- {
- for ( subcol = 0, nxP = &(newxelrow[col * n]);
- subcol < n; ++subcol, ++nxP )
- *nxP = *xP;
- }
- pnm_writepnmrow( stdout, newxelrow, cols * n, maxval, format, 0 );
- }
- }
-
- pm_close( ifp );
- pm_close( stdout );
-
- exit( 0 );
- }
-