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annotate dosemu/dosemu.c @ 24:ad6b185723cd

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foo
author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 21 Sep 2013 20:18:28 +0300
parents 0909996838ff
children 5ff8ce78059a
rev   line source
nuclear@0 1 /* This file implements all calls made to dos-specific code using SDL
nuclear@0 2 * Don't ask why ...
nuclear@0 3 */
nuclear@0 4
nuclear@0 5 #include <stdlib.h>
nuclear@0 6 #include <assert.h>
nuclear@0 7 #include <SDL.h>
nuclear@24 8 #include "wvga.h"
nuclear@0 9 #include "conio.h"
nuclear@0 10 #include "mouse.h"
nuclear@0 11 #include "timer.h"
nuclear@0 12
nuclear@0 13 static void proc_events(void);
nuclear@0 14
nuclear@24 15 /* ----- graphics (wvga.c implementation) ----- */
nuclear@0 16 static SDL_Surface *fbsurf;
nuclear@0 17
nuclear@0 18 #define DOUBLESZ (fbsurf->w != 320)
nuclear@0 19
nuclear@24 20 int set_video_mode(int mode)
nuclear@0 21 {
nuclear@0 22 int resx = 320, resy = 200;
nuclear@9 23 unsigned int sdl_flags = SDL_HWPALETTE;
nuclear@0 24
nuclear@0 25 if(getenv("DOSEMU_DOUBLESIZE")) {
nuclear@0 26 resx *= 2;
nuclear@0 27 resy *= 2;
nuclear@0 28 }
nuclear@0 29
nuclear@9 30 if(getenv("DOSEMU_FULLSCREEN")) {
nuclear@9 31 sdl_flags |= SDL_FULLSCREEN;
nuclear@9 32 }
nuclear@9 33
nuclear@0 34 switch(mode) {
nuclear@0 35 case 0x13:
nuclear@0 36 SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);
nuclear@9 37 if(!(fbsurf = SDL_SetVideoMode(resx, resy, 8, sdl_flags))) {
nuclear@0 38 fprintf(stderr, "failed to set video mode\n");
nuclear@0 39 abort();
nuclear@0 40 }
nuclear@0 41 SDL_ShowCursor(0);
nuclear@11 42 SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);
nuclear@0 43 break;
nuclear@0 44
nuclear@0 45 case 3:
nuclear@0 46 SDL_ShowCursor(1);
nuclear@11 47 SDL_EnableKeyRepeat(0, 0);
nuclear@0 48 SDL_Quit();
nuclear@0 49 break;
nuclear@0 50
nuclear@0 51 default:
nuclear@0 52 break;
nuclear@0 53 }
nuclear@24 54
nuclear@24 55 return 0;
nuclear@0 56 }
nuclear@0 57
nuclear@24 58 void set_palette(int idx, int *col, int count)
nuclear@24 59 {
nuclear@24 60 int i;
nuclear@24 61
nuclear@24 62 for(i=0; i<count; i++) {
nuclear@24 63 set_pal_entry(idx + i, col[0], col[1], col[2]);
nuclear@24 64 col += 3;
nuclear@24 65 }
nuclear@24 66 }
nuclear@24 67
nuclear@24 68 void set_pal_entry(int idx, int r, int g, int b)
nuclear@0 69 {
nuclear@0 70 SDL_Color col;
nuclear@0 71 col.r = r;
nuclear@0 72 col.g = g;
nuclear@0 73 col.b = b;
nuclear@0 74
nuclear@24 75 if(SDL_SetPalette(fbsurf, SDL_LOGPAL | SDL_PHYSPAL, &col, idx, 1) != 1) {
nuclear@0 76 fprintf(stderr, "set_palette failed to set the required color\n");
nuclear@0 77 }
nuclear@0 78 }
nuclear@0 79
nuclear@24 80 void copy_frame(void *pixels)
nuclear@0 81 {
nuclear@24 82 unsigned char *frame = (unsigned char*)pixels;
nuclear@24 83
nuclear@0 84 if(SDL_MUSTLOCK(fbsurf)) {
nuclear@0 85 SDL_LockSurface(fbsurf);
nuclear@0 86 }
nuclear@0 87
nuclear@0 88 if(DOUBLESZ) {
nuclear@0 89 int i, j;
nuclear@0 90 Uint16 *dest = fbsurf->pixels;
nuclear@0 91
nuclear@0 92 for(i=0; i<200; i++) {
nuclear@0 93 for(j=0; j<320; j++) {
nuclear@0 94 Uint16 twopix = ((Uint16)*frame << 8) | (Uint16)*frame;
nuclear@0 95 dest[j] = dest[j + 320] = twopix;
nuclear@0 96 frame++;
nuclear@0 97 }
nuclear@0 98 dest += fbsurf->pitch;
nuclear@0 99 }
nuclear@0 100 } else {
nuclear@0 101 memcpy(fbsurf->pixels, frame, 64000);
nuclear@0 102 }
nuclear@0 103
nuclear@0 104 if(SDL_MUSTLOCK(fbsurf)) {
nuclear@0 105 SDL_UnlockSurface(fbsurf);
nuclear@0 106 }
nuclear@0 107 SDL_Flip(fbsurf);
nuclear@0 108 }
nuclear@0 109
nuclear@0 110 void wait_vsync(void)
nuclear@0 111 {
nuclear@0 112 }
nuclear@0 113
nuclear@0 114 /* ----- event handling (conio.h) ----- */
nuclear@0 115 static SDL_Event *keybev;
nuclear@0 116 static int mousex, mousey, bnmask;
nuclear@0 117
nuclear@0 118 int kbhit(void)
nuclear@0 119 {
nuclear@0 120 if(!keybev) {
nuclear@0 121 proc_events();
nuclear@0 122 }
nuclear@0 123 return keybev != 0;
nuclear@0 124 }
nuclear@0 125
nuclear@9 126 int getch(void)
nuclear@0 127 {
nuclear@9 128 int res;
nuclear@0 129
nuclear@0 130 while(!keybev) {
nuclear@0 131 SDL_Event ev;
nuclear@0 132 SDL_WaitEvent(&ev);
nuclear@0 133 SDL_PushEvent(&ev);
nuclear@0 134 proc_events();
nuclear@0 135 }
nuclear@0 136 res = keybev->key.keysym.sym;
nuclear@0 137 keybev = 0;
nuclear@0 138 return res;
nuclear@0 139 }
nuclear@0 140
nuclear@0 141 /* mouse handling (mouse.c implementation) */
nuclear@0 142 int have_mouse(void)
nuclear@0 143 {
nuclear@0 144 return 1;
nuclear@0 145 }
nuclear@0 146
nuclear@0 147 int read_mouse(int *xp, int *yp)
nuclear@0 148 {
nuclear@0 149 if(xp) *xp = mousex;
nuclear@0 150 if(yp) *yp = mousey;
nuclear@0 151 return bnmask;
nuclear@0 152 }
nuclear@0 153
nuclear@0 154 static void proc_events(void)
nuclear@0 155 {
nuclear@0 156 static SDL_Event ev;
nuclear@0 157
nuclear@0 158 while(SDL_PollEvent(&ev)) {
nuclear@0 159 switch(ev.type) {
nuclear@0 160 case SDL_KEYDOWN:
nuclear@0 161 keybev = &ev;
nuclear@0 162 return;
nuclear@0 163
nuclear@0 164 case SDL_MOUSEMOTION:
nuclear@0 165 mousex = ev.motion.x;
nuclear@0 166 mousey = ev.motion.y;
nuclear@0 167
nuclear@0 168 if(DOUBLESZ) {
nuclear@0 169 mousex /= 2;
nuclear@0 170 mousey /= 2;
nuclear@0 171 }
nuclear@0 172 break;
nuclear@0 173
nuclear@0 174 case SDL_MOUSEBUTTONDOWN:
nuclear@0 175 case SDL_MOUSEBUTTONUP:
nuclear@0 176 {
nuclear@0 177 int mask = 0;
nuclear@0 178 switch(ev.button.button) {
nuclear@0 179 case SDL_BUTTON_LEFT:
nuclear@0 180 mask = MOUSE_LEFT;
nuclear@0 181 break;
nuclear@0 182 case SDL_BUTTON_MIDDLE:
nuclear@0 183 mask = MOUSE_MIDDLE;
nuclear@0 184 break;
nuclear@0 185 case SDL_BUTTON_RIGHT:
nuclear@0 186 mask = MOUSE_RIGHT;
nuclear@0 187 default:
nuclear@0 188 break;
nuclear@0 189 }
nuclear@0 190 if(!mask) {
nuclear@0 191 break;
nuclear@0 192 }
nuclear@0 193
nuclear@0 194 if(ev.button.state == SDL_PRESSED) {
nuclear@0 195 bnmask |= mask;
nuclear@0 196 } else {
nuclear@0 197 bnmask &= ~mask;
nuclear@0 198 }
nuclear@0 199 }
nuclear@0 200 break;
nuclear@0 201
nuclear@0 202 default:
nuclear@0 203 break;
nuclear@0 204 }
nuclear@0 205 }
nuclear@0 206 }
nuclear@0 207
nuclear@0 208 /* ---- timer.c implementation ---- */
nuclear@0 209 static Uint32 start_time;
nuclear@0 210
nuclear@0 211 void init_timer(int res_hz)
nuclear@0 212 {
nuclear@0 213 reset_timer();
nuclear@0 214 }
nuclear@0 215
nuclear@0 216 void reset_timer(void)
nuclear@0 217 {
nuclear@0 218 start_time = SDL_GetTicks();
nuclear@0 219 }
nuclear@0 220
nuclear@0 221 unsigned long get_msec(void)
nuclear@0 222 {
nuclear@0 223 return (unsigned long)(SDL_GetTicks() - start_time);
nuclear@0 224 }