Mercurial > sdl-ios-xcode
annotate test/graywin.c @ 3957:b1d5b56aa549 SDL-1.2
Date: Mon, 4 Jun 2007 06:17:59 +0000 (UTC)
From: George Gensure <werkt0@gmail.com>
Subject: [SDL] error removal patch for SDL_x11dyn.c
I found that calling SDL_GetError when an error hasn't necessarily occurred is
still reporting problems from loadso regarding dynamic functions in X11. I've
added the following to my local copy to avoid revealing the 'many library
lookup' approach adopted by x11dyn.c:
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Wed, 13 Jun 2007 07:54:10 +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 } |