1 /*

2 gbasys - a gameboy advance hardware abstraction library

3 Copyright (C) 2004-2014 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 #ifndef _GFX_H_

19 #define _GFX_H_

20

21 struct pixel_buffer {

22 int x, y, bpp;

23 void *pixels;

24 };

25

26 enum {

27 VMODE_LFB_240x160_16 = 3,

28 VMODE_LFB_240x160_8 = 4,

29 VMODE_LFB_160x128_16 = 5

30 };

31

32 extern struct pixel_buffer *back_buffer, *front_buffer;

33

34 #define RGB(r, g, b)\

35 ((((b) >> 3) & 0x1f) << 10) |\

36 ((((g) >> 3) & 0x1f) << 5) |\

37 (((r) >> 3) & 0x1f)

38

39 #define GET_R(c) ((((c) >> 10) & 0x1f) << 3)

40 #define GET_G(c) ((((c) >> 5) & 0x1f) << 3)

41 #define GET_B(c) (((c) & 0x1f) << 3)

42

43 int set_video_mode(int mode, int back_buffering);

44 void flip(void);

45

46 struct pixel_buffer *create_pixel_buffer(int x, int y, int bpp);

47 void destroy_pixel_buffer(struct pixel_buffer *pbuf);

48

49 void clear_buffer(struct pixel_buffer *pbuf, unsigned short color);

50

51 void copy_buffer(const struct pixel_buffer *src, struct pixel_buffer *dst);

52 void blit(struct pixel_buffer *src, int src_x, int src_y, int src_w, int src_h,

53 struct pixel_buffer *dst, int dest_x, int dest_y);

54

55 void set_palette(int idx, int r, int g, int b);

56

57 #define wait_vsync() while(*((volatile unsigned short*)0x4000006) < front_buffer->y)

58

59 #define put_pixel(px, py, col, pbuf) ((unsigned short*)(pbuf)->pixels)[(py) * (pbuf)->x + (px)] = col

60 void draw_line(int x1, int y1, int x2, int y2, unsigned short col, struct pixel_buffer *pbuf);

61

62 #endif /* _GFX_H_ */