nuclear@0: /*
nuclear@7: gbasys - a gameboy advance hardware abstraction library
nuclear@7: Copyright (C) 2004-2014  John Tsiombikas <nuclear@member.fsf.org>
nuclear@0: 
nuclear@7: This program is free software: you can redistribute it and/or modify
nuclear@0: it under the terms of the GNU General Public License as published by
nuclear@7: the Free Software Foundation, either version 3 of the License, or
nuclear@0: (at your option) any later version.
nuclear@0: 
nuclear@0: This program is distributed in the hope that it will be useful,
nuclear@0: but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@0: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nuclear@0: GNU General Public License for more details.
nuclear@0: 
nuclear@0: You should have received a copy of the GNU General Public License
nuclear@7: along with this program.  If not, see <http://www.gnu.org/licenses/>.
nuclear@0: */
nuclear@0: #ifndef _GFX_H_
nuclear@0: #define _GFX_H_
nuclear@0: 
nuclear@0: struct pixel_buffer {
nuclear@0: 	int x, y, bpp;
nuclear@0: 	void *pixels;
nuclear@2: };
nuclear@0: 
nuclear@0: enum {
nuclear@0: 	VMODE_LFB_240x160_16	= 3,
nuclear@0: 	VMODE_LFB_240x160_8		= 4,
nuclear@0: 	VMODE_LFB_160x128_16	= 5
nuclear@0: };
nuclear@0: 
nuclear@0: extern struct pixel_buffer *back_buffer, *front_buffer;
nuclear@0: 
nuclear@0: #define RGB(r, g, b)\
nuclear@0: 	((((b) >> 3) & 0x1f) << 10) |\
nuclear@0: 	((((g) >> 3) & 0x1f) << 5) |\
nuclear@0: 	(((r) >> 3) & 0x1f)
nuclear@0: 
nuclear@10: #define GET_R(c)	(((c) & 0x1f) << 3)
nuclear@0: #define GET_G(c)	((((c) >> 5) & 0x1f) << 3)
nuclear@10: #define GET_B(c)	((((c) >> 10) & 0x1f) << 3)
nuclear@0: 
nuclear@0: int set_video_mode(int mode, int back_buffering);
nuclear@0: void flip(void);
nuclear@0: 
nuclear@0: struct pixel_buffer *create_pixel_buffer(int x, int y, int bpp);
nuclear@0: void destroy_pixel_buffer(struct pixel_buffer *pbuf);
nuclear@0: 
nuclear@0: void clear_buffer(struct pixel_buffer *pbuf, unsigned short color);
nuclear@0: 
nuclear@0: void copy_buffer(const struct pixel_buffer *src, struct pixel_buffer *dst);
nuclear@3: void blit(struct pixel_buffer *src, int src_x, int src_y, int src_w, int src_h,
nuclear@3: 		struct pixel_buffer *dst, int dest_x, int dest_y);
nuclear@0: 
nuclear@6: void set_palette(int idx, int r, int g, int b);
nuclear@6: 
nuclear@8: /* accepts 8.8 fixed point values */
nuclear@8: void set_bg_matrix(int a, int b, int c, int d);
nuclear@8: void set_bg_scale(int x, int y);
nuclear@8: 
nuclear@2: #define wait_vsync()	while(*((volatile unsigned short*)0x4000006) < front_buffer->y)
nuclear@0: 
nuclear@0: #define put_pixel(px, py, col, pbuf)	((unsigned short*)(pbuf)->pixels)[(py) * (pbuf)->x + (px)] = col
nuclear@0: void draw_line(int x1, int y1, int x2, int y2, unsigned short col, struct pixel_buffer *pbuf);
nuclear@0: 
nuclear@12: int clip_line(int *x1, int *y1, int *x2, int *y2, int left, int top, int right, int bot);
nuclear@12: 
nuclear@0: #endif	/* _GFX_H_ */