Mercurial > sdl-ios-xcode
annotate test/graywin.c @ 4954:144d9df7e611
Added the step to edit local properties
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 04 Jan 2011 12:39:10 -0800 |
parents | 27ab20a36eba |
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rev | line source |
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0 | 1 |
2 /* Simple program: Fill a colormap with gray and stripe it down the screen */ | |
3 | |
4 #include <stdio.h> | |
5 #include <stdlib.h> | |
6 #include <string.h> | |
7 #include <time.h> | |
8 | |
9 #include "SDL.h" | |
10 | |
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11 #ifdef TEST_VGA16 /* Define this if you want to test VGA 16-color video modes */ |
0 | 12 #define NUM_COLORS 16 |
13 #else | |
14 #define NUM_COLORS 256 | |
15 #endif | |
16 | |
17 /* Draw a randomly sized and colored box centered about (X,Y) */ | |
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18 void |
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19 DrawBox(SDL_Surface * screen, int X, int Y, int width, int height) |
0 | 20 { |
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21 static unsigned int seeded = 0; |
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22 SDL_Rect area; |
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23 Uint32 color; |
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24 Uint32 randc; |
0 | 25 |
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26 /* Seed the random number generator */ |
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27 if (seeded == 0) { |
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28 srand((unsigned int)time(NULL)); |
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29 seeded = 1; |
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30 } |
0 | 31 |
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32 /* Get the bounds of the rectangle */ |
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33 area.w = (rand() % width); |
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34 area.h = (rand() % height); |
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35 area.x = X - (area.w / 2); |
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36 area.y = Y - (area.h / 2); |
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37 randc = (rand() % NUM_COLORS); |
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38 |
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39 if (screen->format->BytesPerPixel == 1) { |
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40 color = randc; |
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41 } else { |
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42 color = SDL_MapRGB(screen->format, randc, randc, randc); |
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43 } |
0 | 44 |
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45 /* Do it! */ |
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46 SDL_FillRect(screen, &area, color); |
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47 if (screen->flags & SDL_DOUBLEBUF) { |
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48 SDL_Flip(screen); |
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49 } else { |
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50 SDL_UpdateRects(screen, 1, &area); |
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51 } |
0 | 52 } |
53 | |
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54 void |
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55 DrawBackground(SDL_Surface * screen) |
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56 { |
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57 int i, j, k; |
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58 Uint8 *buffer; |
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59 Uint16 *buffer16; |
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60 Uint16 color; |
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61 Uint8 gradient; |
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62 |
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63 /* Set the surface pixels and refresh! */ |
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64 /* Use two loops in case the surface is double-buffered (both sides) */ |
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65 |
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66 for (j = 0; j < 2; ++j) { |
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67 if (SDL_LockSurface(screen) < 0) { |
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68 fprintf(stderr, "Couldn't lock display surface: %s\n", |
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69 SDL_GetError()); |
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70 return; |
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71 } |
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72 buffer = (Uint8 *) screen->pixels; |
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73 |
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74 if (screen->format->BytesPerPixel != 2) { |
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75 for (i = 0; i < screen->h; ++i) { |
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76 memset(buffer, (i * (NUM_COLORS - 1)) / screen->h, |
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77 screen->w * screen->format->BytesPerPixel); |
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78 buffer += screen->pitch; |
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79 } |
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80 } else { |
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81 for (i = 0; i < screen->h; ++i) { |
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82 gradient = ((i * (NUM_COLORS - 1)) / screen->h); |
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83 color = |
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84 SDL_MapRGB(screen->format, gradient, gradient, gradient); |
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85 buffer16 = (Uint16 *) buffer; |
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86 for (k = 0; k < screen->w; k++) { |
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87 *(buffer16 + k) = color; |
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88 } |
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89 buffer += screen->pitch; |
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90 } |
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91 } |
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92 |
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93 SDL_UnlockSurface(screen); |
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94 if (screen->flags & SDL_DOUBLEBUF) { |
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95 SDL_Flip(screen); |
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96 } else { |
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97 SDL_UpdateRect(screen, 0, 0, 0, 0); |
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98 break; |
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99 } |
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100 } |
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101 } |
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102 |
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103 SDL_Surface * |
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104 CreateScreen(Uint16 w, Uint16 h, Uint8 bpp, Uint32 flags) |
0 | 105 { |
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106 SDL_Surface *screen; |
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107 int i; |
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108 SDL_Color palette[NUM_COLORS]; |
0 | 109 |
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110 /* Set the video mode */ |
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111 screen = SDL_SetVideoMode(w, h, bpp, flags); |
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112 if (screen == NULL) { |
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113 fprintf(stderr, "Couldn't set display mode: %s\n", SDL_GetError()); |
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114 return (NULL); |
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115 } |
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116 fprintf(stderr, "Screen is in %s mode\n", |
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117 (screen->flags & SDL_FULLSCREEN) ? "fullscreen" : "windowed"); |
0 | 118 |
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119 if (bpp == 8) { |
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120 /* Set a gray colormap, reverse order from white to black */ |
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121 for (i = 0; i < NUM_COLORS; ++i) { |
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122 palette[i].r = (NUM_COLORS - 1) - i * (256 / NUM_COLORS); |
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123 palette[i].g = (NUM_COLORS - 1) - i * (256 / NUM_COLORS); |
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124 palette[i].b = (NUM_COLORS - 1) - i * (256 / NUM_COLORS); |
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125 } |
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126 SDL_SetColors(screen, palette, 0, NUM_COLORS); |
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127 } |
0 | 128 |
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129 return (screen); |
0 | 130 } |
131 | |
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132 int |
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133 main(int argc, char *argv[]) |
0 | 134 { |
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135 SDL_Surface *screen; |
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136 Uint32 videoflags; |
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137 int done; |
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138 SDL_Event event; |
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139 int width, height, bpp; |
0 | 140 |
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141 /* Initialize SDL */ |
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142 if (SDL_Init(SDL_INIT_VIDEO) < 0) { |
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143 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); |
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144 exit(1); |
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145 } |
0 | 146 |
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147 /* See if we try to get a hardware colormap */ |
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148 width = 640; |
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149 height = 480; |
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150 bpp = 8; |
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151 videoflags = SDL_SWSURFACE; |
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152 while (argc > 1) { |
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153 --argc; |
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154 if (argv[argc - 1] && (strcmp(argv[argc - 1], "-width") == 0)) { |
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155 width = atoi(argv[argc]); |
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156 --argc; |
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157 } else if (argv[argc - 1] |
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158 && (strcmp(argv[argc - 1], "-height") == 0)) { |
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159 height = atoi(argv[argc]); |
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160 --argc; |
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161 } else if (argv[argc - 1] && (strcmp(argv[argc - 1], "-bpp") == 0)) { |
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162 bpp = atoi(argv[argc]); |
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163 --argc; |
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164 } else if (argv[argc] && (strcmp(argv[argc], "-hw") == 0)) { |
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165 videoflags |= SDL_HWSURFACE; |
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166 } else if (argv[argc] && (strcmp(argv[argc], "-hwpalette") == 0)) { |
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167 videoflags |= SDL_HWPALETTE; |
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168 } else if (argv[argc] && (strcmp(argv[argc], "-flip") == 0)) { |
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169 videoflags |= SDL_DOUBLEBUF; |
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170 } else if (argv[argc] && (strcmp(argv[argc], "-noframe") == 0)) { |
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171 videoflags |= SDL_NOFRAME; |
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172 } else if (argv[argc] && (strcmp(argv[argc], "-resize") == 0)) { |
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173 videoflags |= SDL_RESIZABLE; |
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174 } else if (argv[argc] && (strcmp(argv[argc], "-fullscreen") == 0)) { |
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175 videoflags |= SDL_FULLSCREEN; |
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176 } else { |
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177 fprintf(stderr, |
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178 "Usage: %s [-width] [-height] [-bpp] [-hw] [-hwpalette] [-flip] [-noframe] [-fullscreen] [-resize]\n", |
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179 argv[0]); |
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180 exit(1); |
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181 } |
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182 } |
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183 |
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184 /* Set a video mode */ |
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185 screen = CreateScreen(width, height, bpp, videoflags); |
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186 if (screen == NULL) { |
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187 exit(2); |
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188 } |
0 | 189 |
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190 DrawBackground(screen); |
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191 |
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192 /* Wait for a keystroke */ |
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193 done = 0; |
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194 while (!done && SDL_WaitEvent(&event)) { |
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195 switch (event.type) { |
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196 case SDL_MOUSEBUTTONDOWN: |
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197 DrawBox(screen, event.button.x, event.button.y, width, height); |
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198 break; |
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199 case SDL_KEYDOWN: |
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200 /* Ignore ALT-TAB for windows */ |
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201 if ((event.key.keysym.sym == SDLK_LALT) || |
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202 (event.key.keysym.sym == SDLK_TAB)) { |
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203 break; |
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204 } |
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205 /* Center the mouse on <SPACE> */ |
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206 if (event.key.keysym.sym == SDLK_SPACE) { |
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207 SDL_WarpMouse(width / 2, height / 2); |
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208 break; |
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209 } |
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210 /* Toggle fullscreen mode on <RETURN> */ |
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211 if (event.key.keysym.sym == SDLK_RETURN) { |
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212 videoflags ^= SDL_FULLSCREEN; |
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213 screen = CreateScreen(screen->w, screen->h, |
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214 screen->format->BitsPerPixel, |
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215 videoflags); |
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216 if (screen == NULL) { |
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217 fprintf(stderr, "Couldn't toggle fullscreen mode\n"); |
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218 done = 1; |
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219 } |
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220 DrawBackground(screen); |
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221 break; |
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222 } |
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223 /* Any other key quits the application... */ |
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224 case SDL_QUIT: |
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225 done = 1; |
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226 break; |
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227 case SDL_VIDEOEXPOSE: |
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228 DrawBackground(screen); |
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229 break; |
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230 case SDL_VIDEORESIZE: |
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231 printf("Screen resized to %dx%d\n", event.resize.w, |
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232 event.resize.h); |
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233 screen = |
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234 CreateScreen(event.resize.w, event.resize.h, |
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235 screen->format->BitsPerPixel, videoflags); |
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236 if (screen == NULL) { |
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237 fprintf(stderr, "Couldn't resize video mode\n"); |
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238 done = 1; |
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239 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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240 DrawBackground(screen); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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241 break; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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242 default: |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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243 break; |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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244 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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245 } |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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246 SDL_Quit(); |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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247 return (0); |
0 | 248 } |