dos3d

annotate dosemu/dosemu.c @ 9:bce78aaafc68

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foo
author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 26 Nov 2011 03:59:48 +0200
parents f04884489bad
children 0909996838ff
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
nuclear@0 19 /* This file implements all calls made to dos-specific code using SDL
nuclear@0 20 * Don't ask why ...
nuclear@0 21 */
nuclear@0 22
nuclear@0 23 #include <stdlib.h>
nuclear@0 24 #include <assert.h>
nuclear@0 25 #include <SDL.h>
nuclear@0 26 #include "vga.h"
nuclear@0 27 #include "conio.h"
nuclear@0 28 #include "mouse.h"
nuclear@0 29 #include "timer.h"
nuclear@0 30
nuclear@0 31 static void proc_events(void);
nuclear@0 32
nuclear@0 33 /* ----- graphics (vga.c implementation) ----- */
nuclear@0 34 static SDL_Surface *fbsurf;
nuclear@0 35
nuclear@0 36 #define DOUBLESZ (fbsurf->w != 320)
nuclear@0 37
nuclear@0 38 void set_video_mode(int mode)
nuclear@0 39 {
nuclear@0 40 int resx = 320, resy = 200;
nuclear@9 41 unsigned int sdl_flags = SDL_HWPALETTE;
nuclear@0 42
nuclear@0 43 if(getenv("DOSEMU_DOUBLESIZE")) {
nuclear@0 44 resx *= 2;
nuclear@0 45 resy *= 2;
nuclear@0 46 }
nuclear@0 47
nuclear@9 48 if(getenv("DOSEMU_FULLSCREEN")) {
nuclear@9 49 sdl_flags |= SDL_FULLSCREEN;
nuclear@9 50 }
nuclear@9 51
nuclear@0 52 switch(mode) {
nuclear@0 53 case 0x13:
nuclear@0 54 SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);
nuclear@9 55 if(!(fbsurf = SDL_SetVideoMode(resx, resy, 8, sdl_flags))) {
nuclear@0 56 fprintf(stderr, "failed to set video mode\n");
nuclear@0 57 abort();
nuclear@0 58 }
nuclear@0 59 SDL_ShowCursor(0);
nuclear@0 60 break;
nuclear@0 61
nuclear@0 62 case 3:
nuclear@0 63 SDL_ShowCursor(1);
nuclear@0 64 SDL_Quit();
nuclear@0 65 break;
nuclear@0 66
nuclear@0 67 default:
nuclear@0 68 break;
nuclear@0 69 }
nuclear@0 70 }
nuclear@0 71
nuclear@0 72 void set_palette(unsigned char c, unsigned char r, unsigned char g, unsigned char b)
nuclear@0 73 {
nuclear@0 74 SDL_Color col;
nuclear@0 75 col.r = r;
nuclear@0 76 col.g = g;
nuclear@0 77 col.b = b;
nuclear@0 78
nuclear@0 79 if(SDL_SetPalette(fbsurf, SDL_LOGPAL | SDL_PHYSPAL, &col, c, 1) != 1) {
nuclear@0 80 fprintf(stderr, "set_palette failed to set the required color\n");
nuclear@0 81 }
nuclear@0 82 }
nuclear@0 83
nuclear@0 84 void copy_frame(unsigned char *frame)
nuclear@0 85 {
nuclear@0 86 if(SDL_MUSTLOCK(fbsurf)) {
nuclear@0 87 SDL_LockSurface(fbsurf);
nuclear@0 88 }
nuclear@0 89
nuclear@0 90 if(DOUBLESZ) {
nuclear@0 91 int i, j;
nuclear@0 92 Uint16 *dest = fbsurf->pixels;
nuclear@0 93
nuclear@0 94 for(i=0; i<200; i++) {
nuclear@0 95 for(j=0; j<320; j++) {
nuclear@0 96 Uint16 twopix = ((Uint16)*frame << 8) | (Uint16)*frame;
nuclear@0 97 dest[j] = dest[j + 320] = twopix;
nuclear@0 98 frame++;
nuclear@0 99 }
nuclear@0 100 dest += fbsurf->pitch;
nuclear@0 101 }
nuclear@0 102 } else {
nuclear@0 103 memcpy(fbsurf->pixels, frame, 64000);
nuclear@0 104 }
nuclear@0 105
nuclear@0 106 if(SDL_MUSTLOCK(fbsurf)) {
nuclear@0 107 SDL_UnlockSurface(fbsurf);
nuclear@0 108 }
nuclear@0 109 SDL_Flip(fbsurf);
nuclear@0 110 }
nuclear@0 111
nuclear@0 112 void wait_vsync(void)
nuclear@0 113 {
nuclear@0 114 }
nuclear@0 115
nuclear@0 116 /* ----- event handling (conio.h) ----- */
nuclear@0 117 static SDL_Event *keybev;
nuclear@0 118 static int mousex, mousey, bnmask;
nuclear@0 119
nuclear@0 120 int kbhit(void)
nuclear@0 121 {
nuclear@0 122 if(!keybev) {
nuclear@0 123 proc_events();
nuclear@0 124 }
nuclear@0 125 return keybev != 0;
nuclear@0 126 }
nuclear@0 127
nuclear@9 128 int getch(void)
nuclear@0 129 {
nuclear@9 130 int res;
nuclear@0 131
nuclear@0 132 while(!keybev) {
nuclear@0 133 SDL_Event ev;
nuclear@0 134 SDL_WaitEvent(&ev);
nuclear@0 135 SDL_PushEvent(&ev);
nuclear@0 136 proc_events();
nuclear@0 137 }
nuclear@0 138 res = keybev->key.keysym.sym;
nuclear@0 139 keybev = 0;
nuclear@0 140 return res;
nuclear@0 141 }
nuclear@0 142
nuclear@0 143 /* mouse handling (mouse.c implementation) */
nuclear@0 144 int have_mouse(void)
nuclear@0 145 {
nuclear@0 146 return 1;
nuclear@0 147 }
nuclear@0 148
nuclear@0 149 int read_mouse(int *xp, int *yp)
nuclear@0 150 {
nuclear@0 151 if(xp) *xp = mousex;
nuclear@0 152 if(yp) *yp = mousey;
nuclear@0 153 return bnmask;
nuclear@0 154 }
nuclear@0 155
nuclear@0 156 static void proc_events(void)
nuclear@0 157 {
nuclear@0 158 static SDL_Event ev;
nuclear@0 159
nuclear@0 160 while(SDL_PollEvent(&ev)) {
nuclear@0 161 switch(ev.type) {
nuclear@0 162 case SDL_KEYDOWN:
nuclear@0 163 keybev = &ev;
nuclear@0 164 return;
nuclear@0 165
nuclear@0 166 case SDL_MOUSEMOTION:
nuclear@0 167 mousex = ev.motion.x;
nuclear@0 168 mousey = ev.motion.y;
nuclear@0 169
nuclear@0 170 if(DOUBLESZ) {
nuclear@0 171 mousex /= 2;
nuclear@0 172 mousey /= 2;
nuclear@0 173 }
nuclear@0 174 break;
nuclear@0 175
nuclear@0 176 case SDL_MOUSEBUTTONDOWN:
nuclear@0 177 case SDL_MOUSEBUTTONUP:
nuclear@0 178 {
nuclear@0 179 int mask = 0;
nuclear@0 180 switch(ev.button.button) {
nuclear@0 181 case SDL_BUTTON_LEFT:
nuclear@0 182 mask = MOUSE_LEFT;
nuclear@0 183 break;
nuclear@0 184 case SDL_BUTTON_MIDDLE:
nuclear@0 185 mask = MOUSE_MIDDLE;
nuclear@0 186 break;
nuclear@0 187 case SDL_BUTTON_RIGHT:
nuclear@0 188 mask = MOUSE_RIGHT;
nuclear@0 189 default:
nuclear@0 190 break;
nuclear@0 191 }
nuclear@0 192 if(!mask) {
nuclear@0 193 break;
nuclear@0 194 }
nuclear@0 195
nuclear@0 196 if(ev.button.state == SDL_PRESSED) {
nuclear@0 197 bnmask |= mask;
nuclear@0 198 } else {
nuclear@0 199 bnmask &= ~mask;
nuclear@0 200 }
nuclear@0 201 }
nuclear@0 202 break;
nuclear@0 203
nuclear@0 204 default:
nuclear@0 205 break;
nuclear@0 206 }
nuclear@0 207 }
nuclear@0 208 }
nuclear@0 209
nuclear@0 210 /* ---- timer.c implementation ---- */
nuclear@0 211 static Uint32 start_time;
nuclear@0 212
nuclear@0 213 void init_timer(int res_hz)
nuclear@0 214 {
nuclear@0 215 reset_timer();
nuclear@0 216 }
nuclear@0 217
nuclear@0 218 void reset_timer(void)
nuclear@0 219 {
nuclear@0 220 start_time = SDL_GetTicks();
nuclear@0 221 }
nuclear@0 222
nuclear@0 223 unsigned long get_msec(void)
nuclear@0 224 {
nuclear@0 225 return (unsigned long)(SDL_GetTicks() - start_time);
nuclear@0 226 }