1 /*

2 256-color 3D graphics hack for real-mode DOS.

3 Copyright (C) 2011 John Tsiombikas <nuclear@member.fsf.org>

4

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.

9

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.

14

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 */

18

19 #include <stdlib.h>

20 #include "texture.h"

21 #include "palman.h"

22

23 struct texture *tex_load(const char *fname)

24 {

25 return 0; /* TODO */

26 }

27

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;

33

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;

43

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 }