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1 /*
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2 This file is part of libgba, a library for GameBoy Advance development.
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3 Copyright (C) 2004, 2005 John Tsiombikas <nuclear@siggraph.org>
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4
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5 This program is free software; you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 2 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18 */
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19
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20 #ifndef _GFX_H_
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21 #define _GFX_H_
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22
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23 struct pixel_buffer {
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24 int x, y, bpp;
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25 void *pixels;
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26 };
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27
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28 enum {
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29 VMODE_LFB_240x160_16 = 3,
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30 VMODE_LFB_240x160_8 = 4,
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31 VMODE_LFB_160x128_16 = 5
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32 };
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33
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34 extern struct pixel_buffer *back_buffer, *front_buffer;
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35
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36 #define RGB(r, g, b)\
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37 ((((b) >> 3) & 0x1f) << 10) |\
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38 ((((g) >> 3) & 0x1f) << 5) |\
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39 (((r) >> 3) & 0x1f)
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40
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41 #define GET_R(c) ((((c) >> 10) & 0x1f) << 3)
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42 #define GET_G(c) ((((c) >> 5) & 0x1f) << 3)
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43 #define GET_B(c) (((c) & 0x1f) << 3)
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44
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45 int set_video_mode(int mode, int back_buffering);
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46 void flip(void);
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47
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48 struct pixel_buffer *create_pixel_buffer(int x, int y, int bpp);
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49 void destroy_pixel_buffer(struct pixel_buffer *pbuf);
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50
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51 void clear_buffer(struct pixel_buffer *pbuf, unsigned short color);
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52
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53 void copy_buffer(const struct pixel_buffer *src, struct pixel_buffer *dst);
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54 void blit(struct pixel_buffer *src, int src_x, int src_y, int src_w, int src_h,
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55 struct pixel_buffer *dst, int dest_x, int dest_y);
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56
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57 void set_palette(int idx, int r, int g, int b);
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58
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59 /* accepts 8.8 fixed point values */
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60 void set_bg_matrix(int a, int b, int c, int d);
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61 void set_bg_scale(int x, int y);
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62
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63 #define wait_vsync() while(*((volatile unsigned short*)0x4000006) < front_buffer->y)
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64
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65 #define put_pixel(px, py, col, pbuf) ((unsigned short*)(pbuf)->pixels)[(py) * (pbuf)->x + (px)] = col
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66 void draw_line(int x1, int y1, int x2, int y2, unsigned short col, struct pixel_buffer *pbuf);
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67
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68 #endif /* _GFX_H_ */
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