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