Mercurial > sdl-ios-xcode
annotate test/graywin.c @ 3164:c5b2884c26b4
Added an ifdef so that if you
#define SDL_NO_COMPAT
before you include SDL.h then SDL_compat.h will never be included in your code.
This is useful for making sure that your code uses only SDL 1.3 features.
It is also handy for finding things that are in SDL_compat.h that belong elsewhere.
author | Bob Pendleton <bob@pendleton.com> |
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date | Thu, 04 Jun 2009 21:00:45 +0000 |
parents | c121d94672cb |
children | 27ab20a36eba |
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(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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240 DrawBackground(screen); |
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241 break; |
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242 default: |
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243 break; |
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244 } |
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245 } |
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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.
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247 return (0); |
0 | 248 } |