Mercurial > sdl-ios-xcode
annotate test/graywin.c @ 1298:e1b8e1b97b67
This library is now available under the LGPL 2.1, the major change of which
is allowing linking with a shared object to be considered sufficient for
complying with section 6 of the LGPL.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 30 Jan 2006 14:27:56 +0000 |
| parents | d33645c36072 |
| children | 782fd950bd46 c121d94672cb |
| rev | line source |
|---|---|
| 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 | |
| 11 #ifdef TEST_VGA16 /* Define this if you want to test VGA 16-color video modes */ | |
| 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 DrawBox(SDL_Surface *screen, int X, int Y, int width, int height) |
| 0 | 19 { |
| 20 static unsigned int seeded = 0; | |
| 21 SDL_Rect area; | |
| 22 Uint32 color; | |
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23 Uint32 randc; |
| 0 | 24 |
| 25 /* Seed the random number generator */ | |
| 26 if ( seeded == 0 ) { | |
| 27 srand(time(NULL)); | |
| 28 seeded = 1; | |
| 29 } | |
| 30 | |
| 31 /* Get the bounds of the rectangle */ | |
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32 area.w = (rand()%width); |
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33 area.h = (rand()%height); |
| 0 | 34 area.x = X-(area.w/2); |
| 35 area.y = Y-(area.h/2); | |
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36 randc = (rand()%NUM_COLORS); |
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37 |
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38 if (screen->format->BytesPerPixel==1) |
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39 { |
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40 color = randc; |
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41 } |
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42 else |
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43 { |
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44 color = SDL_MapRGB(screen->format, randc, randc, randc); |
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45 } |
| 0 | 46 |
| 47 /* Do it! */ | |
| 48 SDL_FillRect(screen, &area, color); | |
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49 if ( screen->flags & SDL_DOUBLEBUF ) { |
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50 SDL_Flip(screen); |
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51 } else { |
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52 SDL_UpdateRects(screen, 1, &area); |
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53 } |
| 0 | 54 } |
| 55 | |
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56 void DrawBackground(SDL_Surface *screen) |
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57 { |
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58 int i, j, k; |
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59 Uint8 *buffer; |
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60 Uint16 *buffer16; |
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61 Uint16 color; |
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62 Uint8 gradient; |
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63 |
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64 /* Set the surface pixels and refresh! */ |
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65 /* Use two loops in case the surface is double-buffered (both sides) */ |
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66 |
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67 for ( j=0; j<2; ++j ) { |
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68 if ( SDL_LockSurface(screen) < 0 ) { |
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69 fprintf(stderr, "Couldn't lock display surface: %s\n", |
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70 SDL_GetError()); |
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71 return; |
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72 } |
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73 buffer = (Uint8 *)screen->pixels; |
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74 |
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75 if (screen->format->BytesPerPixel!=2) { |
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76 for ( i=0; i<screen->h; ++i ) { |
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77 memset(buffer,(i*(NUM_COLORS-1))/screen->h, screen->w * screen->format->BytesPerPixel); |
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78 buffer += screen->pitch; |
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79 } |
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80 } |
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81 else |
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82 { |
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83 for ( i=0; i<screen->h; ++i ) { |
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84 gradient=((i*(NUM_COLORS-1))/screen->h); |
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85 color = SDL_MapRGB(screen->format, gradient, gradient, gradient); |
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86 buffer16=(Uint16*)buffer; |
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87 for (k=0; k<screen->w; k++) |
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88 { |
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89 *(buffer16+k)=color; |
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90 } |
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91 buffer += screen->pitch; |
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92 } |
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93 } |
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94 |
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95 SDL_UnlockSurface(screen); |
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96 if ( screen->flags & SDL_DOUBLEBUF ) { |
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97 SDL_Flip(screen); |
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98 } else { |
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99 SDL_UpdateRect(screen, 0, 0, 0, 0); |
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100 break; |
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101 } |
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102 } |
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103 } |
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104 |
| 0 | 105 SDL_Surface *CreateScreen(Uint16 w, Uint16 h, Uint8 bpp, Uint32 flags) |
| 106 { | |
| 107 SDL_Surface *screen; | |
| 108 int i; | |
| 109 SDL_Color palette[NUM_COLORS]; | |
| 110 | |
| 111 /* Set the video mode */ | |
| 112 screen = SDL_SetVideoMode(w, h, bpp, flags); | |
| 113 if ( screen == NULL ) { | |
| 114 fprintf(stderr, "Couldn't set display mode: %s\n", | |
| 115 SDL_GetError()); | |
| 116 return(NULL); | |
| 117 } | |
| 118 fprintf(stderr, "Screen is in %s mode\n", | |
| 119 (screen->flags & SDL_FULLSCREEN) ? "fullscreen" : "windowed"); | |
| 120 | |
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121 if (bpp==8) { |
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122 /* Set a gray colormap, reverse order from white to black */ |
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123 for ( i=0; i<NUM_COLORS; ++i ) { |
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124 palette[i].r = (NUM_COLORS-1)-i * (256 / NUM_COLORS); |
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125 palette[i].g = (NUM_COLORS-1)-i * (256 / NUM_COLORS); |
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126 palette[i].b = (NUM_COLORS-1)-i * (256 / NUM_COLORS); |
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127 } |
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128 SDL_SetColors(screen, palette, 0, NUM_COLORS); |
| 0 | 129 } |
| 130 | |
| 131 return(screen); | |
| 132 } | |
| 133 | |
| 134 int main(int argc, char *argv[]) | |
| 135 { | |
| 136 SDL_Surface *screen; | |
| 137 Uint32 videoflags; | |
| 138 int done; | |
| 139 SDL_Event event; | |
| 140 int width, height, bpp; | |
| 141 | |
| 142 /* Initialize SDL */ | |
| 143 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 144 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
| 145 exit(1); | |
| 146 } | |
| 147 | |
| 148 /* See if we try to get a hardware colormap */ | |
| 149 width = 640; | |
| 150 height = 480; | |
| 151 bpp = 8; | |
| 152 videoflags = SDL_SWSURFACE; | |
| 153 while ( argc > 1 ) { | |
| 154 --argc; | |
| 155 if ( argv[argc-1] && (strcmp(argv[argc-1], "-width") == 0) ) { | |
| 156 width = atoi(argv[argc]); | |
| 157 --argc; | |
| 158 } else | |
| 159 if ( argv[argc-1] && (strcmp(argv[argc-1], "-height") == 0) ) { | |
| 160 height = atoi(argv[argc]); | |
| 161 --argc; | |
| 162 } else | |
| 163 if ( argv[argc-1] && (strcmp(argv[argc-1], "-bpp") == 0) ) { | |
| 164 bpp = atoi(argv[argc]); | |
| 165 --argc; | |
| 166 } else | |
| 167 if ( argv[argc] && (strcmp(argv[argc], "-hw") == 0) ) { | |
| 168 videoflags |= SDL_HWSURFACE; | |
| 169 } else | |
| 170 if ( argv[argc] && (strcmp(argv[argc], "-hwpalette") == 0) ) { | |
| 171 videoflags |= SDL_HWPALETTE; | |
| 172 } else | |
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173 if ( argv[argc] && (strcmp(argv[argc], "-flip") == 0) ) { |
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174 videoflags |= SDL_DOUBLEBUF; |
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175 } else |
| 0 | 176 if ( argv[argc] && (strcmp(argv[argc], "-noframe") == 0) ) { |
| 177 videoflags |= SDL_NOFRAME; | |
| 178 } else | |
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179 if ( argv[argc] && (strcmp(argv[argc], "-resize") == 0) ) { |
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180 videoflags |= SDL_RESIZABLE; |
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181 } else |
| 0 | 182 if ( argv[argc] && (strcmp(argv[argc], "-fullscreen") == 0) ) { |
| 183 videoflags |= SDL_FULLSCREEN; | |
| 184 } else { | |
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185 fprintf(stderr, "Usage: %s [-width] [-height] [-bpp] [-hw] [-hwpalette] [-flip] [-noframe] [-fullscreen] [-resize]\n", |
| 0 | 186 argv[0]); |
| 187 exit(1); | |
| 188 } | |
| 189 } | |
| 190 | |
| 191 /* Set a video mode */ | |
| 192 screen = CreateScreen(width, height, bpp, videoflags); | |
| 193 if ( screen == NULL ) { | |
| 194 exit(2); | |
| 195 } | |
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196 |
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197 DrawBackground(screen); |
| 0 | 198 |
| 199 /* Wait for a keystroke */ | |
| 200 done = 0; | |
| 201 while ( !done && SDL_WaitEvent(&event) ) { | |
| 202 switch (event.type) { | |
| 203 case SDL_MOUSEBUTTONDOWN: | |
|
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204 DrawBox(screen, event.button.x, event.button.y, width, height); |
| 0 | 205 break; |
| 206 case SDL_KEYDOWN: | |
| 207 /* Ignore ALT-TAB for windows */ | |
| 208 if ( (event.key.keysym.sym == SDLK_LALT) || | |
| 209 (event.key.keysym.sym == SDLK_TAB) ) { | |
| 210 break; | |
| 211 } | |
| 212 /* Center the mouse on <SPACE> */ | |
| 213 if ( event.key.keysym.sym == SDLK_SPACE ) { | |
|
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214 SDL_WarpMouse(width/2, height/2); |
| 0 | 215 break; |
| 216 } | |
| 217 /* Toggle fullscreen mode on <RETURN> */ | |
| 218 if ( event.key.keysym.sym == SDLK_RETURN ) { | |
| 219 videoflags ^= SDL_FULLSCREEN; | |
| 220 screen = CreateScreen( | |
| 221 screen->w, screen->h, | |
| 222 screen->format->BitsPerPixel, | |
| 223 videoflags); | |
| 224 if ( screen == NULL ) { | |
| 225 fprintf(stderr, | |
| 226 "Couldn't toggle fullscreen mode\n"); | |
| 227 done = 1; | |
| 228 } | |
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229 DrawBackground(screen); |
| 0 | 230 break; |
| 231 } | |
| 232 /* Any other key quits the application... */ | |
| 233 case SDL_QUIT: | |
| 234 done = 1; | |
| 235 break; | |
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236 case SDL_VIDEOEXPOSE: |
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237 DrawBackground(screen); |
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238 break; |
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239 case SDL_VIDEORESIZE: |
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240 screen = CreateScreen( |
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241 event.resize.w, event.resize.h, |
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242 screen->format->BitsPerPixel, |
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243 videoflags); |
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244 if ( screen == NULL ) { |
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245 fprintf(stderr, |
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246 "Couldn't resize video mode\n"); |
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247 done = 1; |
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248 } |
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249 DrawBackground(screen); |
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250 break; |
| 0 | 251 default: |
| 252 break; | |
| 253 } | |
| 254 } | |
| 255 SDL_Quit(); | |
| 256 return(0); | |
| 257 } |