| /* @(#) Reduces the spatial resolution of an image by increasing the |
| * @(#) pixel size |
| * @(#) |
| * @(#) Usage: spatres in out step |
| * @(#) |
| * |
| * Copyright: 1991, N. Dessipris. |
| * |
| * Author: Nicos Dessipris |
| * Written on: 27/03/1991 |
| * Modified on : |
| */ |
| |
| /* |
| |
| This file is part of VIPS. |
| |
| VIPS is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| |
| */ |
| |
| /* |
| |
| These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk |
| |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif /*HAVE_CONFIG_H*/ |
| #include <vips/intl.h> |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <locale.h> |
| |
| #include <vips/vips.h> |
| |
| int |
| main( int argc, char **argv ) |
| { |
| IMAGE *in, *out; |
| int step = 0; |
| |
| if( im_init_world( argv[0] ) ) |
| error_exit( "unable to start VIPS" ); |
| textdomain( GETTEXT_PACKAGE ); |
| setlocale( LC_ALL, "" ); |
| |
| if ( (argc != 4)||(argv[1][0] == '-') ) |
| error_exit( |
| "Usage:\n%s in out step\n\n\ |
| WARNING: The program destroys the opfile if the owner has rw access on it.", |
| argv[0]); |
| |
| step = atoi(argv[3]); |
| |
| if ((in= im_open(argv[1],"r")) == NULL) |
| error_exit("Unable to open %s for input", argv[1]); |
| |
| if ( (out=im_open(argv[2],"w")) == NULL ) |
| error_exit("Unable to open %s", argv[2]); |
| |
| if ( im_spatres(in, out, step) == -1) |
| error_exit("Unable to im_spatres"); |
| |
| if ( im_updatehist(out, argv[0], argc - 1, argv + 1) == -1) |
| error_exit("Unable to update history"); |
| |
| if ( (im_close(in) == -1)||(im_close(out) == -1) ) |
| error_exit("unable to close %s or %s",argv[1],argv[2]); |
| |
| return(0); |
| } |