dos3d

view src/texture.c @ 3:0e781cc43178

adding textures
author John Tsiombikas <nuclear@member.fsf.org>
date Mon, 21 Nov 2011 10:16:09 +0200
parents
children c3e0bccd673e
line source
1 /*
2 256-color 3D graphics hack for real-mode DOS.
3 Copyright (C) 2011 John Tsiombikas <nuclear@member.fsf.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
19 #include <stdlib.h>
20 #include "texture.h"
21 #include "palman.h"
23 struct texture *tex_load(const char *fname)
24 {
25 return 0; /* TODO */
26 }
28 struct texture *tex_gen_checker(int xsz, int ysz, int ush, int vsh, int c1, int c2)
29 {
30 int i, j;
31 struct texture *tex;
32 unsigned char *pptr;
34 if(!(tex = malloc(sizeof *tex))) {
35 return 0;
36 }
37 if(!(tex->pixels = malloc(xsz * ysz))) {
38 free(tex);
39 return 0;
40 }
41 tex->width = xsz;
42 tex->height = ysz;
44 pptr = tex->pixels;
45 for(i=0; i<ysz; i++) {
46 for(j=0; j<xsz; j++) {
47 int c = ((i >> vsh) & 1) == ((j >> ush) & 1) ? c1 : c2;
48 *pptr++ = c;
49 }
50 }
51 return tex;
52 }