| /* @(#) Creates a 2 band IM_BANDFMT_UINT image of a specified size. Each pixel |
| * @(#) has band 0 == x coordinate, band 1 == y coordinate. |
| * @(#) |
| * @(#) Usage: |
| * @(#) |
| * @(#) int |
| * @(#) im_make_xy( image, xsize, ysize ) |
| * @(#) IMAGE *image; |
| * @(#) int xsize, ysize; |
| * @(#) |
| * @(#) Returns 0 on success and -1 on error |
| * @(#) |
| * |
| * 21/4/04 |
| * - from im_grey |
| */ |
| |
| /* |
| |
| 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 <math.h> |
| |
| #include <vips/vips.h> |
| |
| #ifdef WITH_DMALLOC |
| #include <dmalloc.h> |
| #endif /*WITH_DMALLOC*/ |
| |
| /* Generate function. |
| */ |
| static int |
| make_xy_gen( REGION *or, void *seq, void *a, void *b ) |
| { |
| Rect *r = &or->valid; |
| int le = r->left; |
| int to = r->top; |
| int ri = IM_RECT_RIGHT( r ); |
| int bo = IM_RECT_BOTTOM( r ); |
| |
| int x, y; |
| |
| for( y = to; y < bo; y++ ) { |
| unsigned int *q = (unsigned int *) IM_REGION_ADDR( or, le, y ); |
| |
| for( x = le; x < ri; x++ ) { |
| q[0] = x; |
| q[1] = y; |
| q += 2; |
| } |
| } |
| |
| return( 0 ); |
| } |
| |
| /* Make a two band image ... band 0 is x coordinates, band 1 is y |
| * coordinates. |
| */ |
| int |
| im_make_xy( IMAGE *out, const int xsize, const int ysize ) |
| { |
| /* Check args. |
| */ |
| if( xsize <=0 || ysize <= 0 ) { |
| im_error( "im_make_xy", "%s", _( "bad size" ) ); |
| return( -1 ); |
| } |
| if( im_poutcheck( out ) ) |
| return( -1 ); |
| |
| /* Set image. |
| */ |
| im_initdesc( out, xsize, ysize, 2, IM_BBITS_INT, IM_BANDFMT_UINT, |
| IM_CODING_NONE, IM_TYPE_MULTIBAND, 1.0, 1.0, 0, 0 ); |
| |
| /* Set hints - ANY is ok with us. |
| */ |
| if( im_demand_hint( out, IM_ANY, NULL ) ) |
| return( -1 ); |
| |
| /* Generate image. |
| */ |
| if( im_generate( out, NULL, make_xy_gen, NULL, NULL, NULL ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |
