1 /*

2 This file is part of libgba, a library for GameBoy Advance development.

3 Copyright (C) 2004, 2005 John Tsiombikas <nuclear@siggraph.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 2 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, write to the Free Software

17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

18 */

19

20 #ifndef _GFX_H_

21 #define _GFX_H_

22

23 struct pixel_buffer {

24 int x, y, bpp;

25 void *pixels;

26 };

27

28 enum {

29 VMODE_LFB_240x160_16 = 3,

30 VMODE_LFB_240x160_8 = 4,

31 VMODE_LFB_160x128_16 = 5

32 };

33

34 extern struct pixel_buffer *back_buffer, *front_buffer;

35

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

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

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

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

40

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

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

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

44

45 int set_video_mode(int mode, int back_buffering);

46 void flip(void);

47

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

49 void destroy_pixel_buffer(struct pixel_buffer *pbuf);

50

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

52

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

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

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

56

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

58

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

60

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

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

63

64 #endif /* _GFX_H_ */