dos3d
annotate src/vga.c @ 12:c29a6e024950
merged
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Mon, 28 Nov 2011 05:03:22 +0200 |
| parents | |
| children |
| rev | line source |
|---|---|
| nuclear@0 | 1 /* |
| nuclear@0 | 2 256-color 3D graphics hack for real-mode DOS. |
| nuclear@0 | 3 Copyright (C) 2011 John Tsiombikas <nuclear@member.fsf.org> |
| nuclear@0 | 4 |
| nuclear@0 | 5 This program is free software: you can redistribute it and/or modify |
| nuclear@0 | 6 it under the terms of the GNU General Public License as published by |
| nuclear@0 | 7 the Free Software Foundation, either version 3 of the License, or |
| nuclear@0 | 8 (at your option) any later version. |
| nuclear@0 | 9 |
| nuclear@0 | 10 This program is distributed in the hope that it will be useful, |
| nuclear@0 | 11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
| nuclear@0 | 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| nuclear@0 | 13 GNU General Public License for more details. |
| nuclear@0 | 14 |
| nuclear@0 | 15 You should have received a copy of the GNU General Public License |
| nuclear@0 | 16 along with this program. If not, see <http://www.gnu.org/licenses/>. |
| nuclear@0 | 17 */ |
| nuclear@0 | 18 #include <dos.h> |
| nuclear@0 | 19 #include <string.h> |
| nuclear@0 | 20 |
| nuclear@0 | 21 void set_video_mode(int mode) |
| nuclear@0 | 22 { |
| nuclear@0 | 23 asm { |
| nuclear@0 | 24 mov ax, mode |
| nuclear@0 | 25 int 0x10 |
| nuclear@0 | 26 } |
| nuclear@0 | 27 } |
| nuclear@0 | 28 |
| nuclear@0 | 29 void set_palette(unsigned char c, unsigned char r, unsigned char g, unsigned char b) |
| nuclear@0 | 30 { |
| nuclear@0 | 31 asm { |
| nuclear@0 | 32 mov dx, 0x3c8 |
| nuclear@0 | 33 mov al, c |
| nuclear@0 | 34 out dx, al |
| nuclear@0 | 35 inc dx |
| nuclear@0 | 36 mov al, r |
| nuclear@0 | 37 shr al, 2 |
| nuclear@0 | 38 out dx, al |
| nuclear@0 | 39 mov al, g |
| nuclear@0 | 40 shr al, 2 |
| nuclear@0 | 41 out dx, al |
| nuclear@0 | 42 mov al, b |
| nuclear@0 | 43 shr al, 2 |
| nuclear@0 | 44 out dx, al |
| nuclear@0 | 45 } |
| nuclear@0 | 46 } |
| nuclear@0 | 47 |
| nuclear@0 | 48 void copy_frame(unsigned char *frame) |
| nuclear@0 | 49 { |
| nuclear@0 | 50 _fmemcpy(MK_FP(0xa000, 0), frame, 64000); |
| nuclear@0 | 51 } |
| nuclear@0 | 52 |
| nuclear@0 | 53 void wait_vsync(void) |
| nuclear@0 | 54 { |
| nuclear@0 | 55 asm mov dx, 0x3da |
| nuclear@0 | 56 l1: |
| nuclear@0 | 57 asm { |
| nuclear@0 | 58 in al, dx |
| nuclear@0 | 59 and al, 0x8 |
| nuclear@0 | 60 jnz l1 |
| nuclear@0 | 61 } |
| nuclear@0 | 62 l2: |
| nuclear@0 | 63 asm { |
| nuclear@0 | 64 in al, dx |
| nuclear@0 | 65 and al, 0x8 |
| nuclear@0 | 66 jz l2 |
| nuclear@0 | 67 } |
| nuclear@0 | 68 } |