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/* pnmcut.c - cut a rectangle out of a portable anymap
**
** 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;
register xel* xelrow;
xelval maxval;
int rows, cols, format, x, y, width, height, row;
char* usage = "x y width height [pnmfile]";
pnm_init( &argc, argv );
if ( argc < 5 || argc > 6 )
pm_usage( usage );
if ( sscanf( argv[1], "%d", &x ) != 1 )
pm_usage( usage );
if ( sscanf( argv[2], "%d", &y ) != 1 )
pm_usage( usage );
if ( sscanf( argv[3], "%d", &width ) != 1 )
pm_usage( usage );
if ( sscanf( argv[4], "%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 == 6 )
ifp = pm_openr( argv[5] );
else
ifp = stdin;
pnm_readpnminit( ifp, &cols, &rows, &maxval, &format );
xelrow = pnm_allocrow( cols );
if ( x <= -cols )
pm_error(
"x is too negative -- the anymap has only %d cols", cols );
else if ( x >= cols )
pm_error(
"x is too large -- the anymap has only %d cols", cols );
if ( y <= -rows )
pm_error(
"y is too negative -- the anymap has only %d rows", rows );
else if ( y >= rows )
pm_error(
"y is too large -- the anymap has only %d rows", rows );
if ( x < 0 )
x += cols;
if ( y < 0 )
y += rows;
if ( x + width > cols )
pm_error(
"x + width is too large by %d xels", x + width - cols );
if ( y + height > rows )
pm_error(
"y + height is too large by %d xels", y + height - rows );
pnm_writepnminit( stdout, width, height, maxval, format, 0 );
for ( row = 0; row < y + height; row++ )
{
pnm_readpnmrow( ifp, xelrow, cols, maxval, format );
if ( row >= y )
pnm_writepnmrow( stdout, &(xelrow[x]), width, maxval, format, 0 );
}
pm_close( ifp );
pm_close( stdout );
exit( 0 );
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.