Mercurial > sdl-ios-xcode
annotate test/testsprite.c @ 1151:be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
if SDL is built with a non-cdecl calling convention, and it's just generally
bad practice anyhow.
Now programs explicitly call SDL_Quit() where appropriate, wrap SDL_Quit() in
a cdecl function where it can't be avoided, and rely on the parachute where
a crash might have hit the atexit() before (these ARE test programs, after
all!).
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Wed, 28 Sep 2005 11:36:20 +0000 |
| parents | b14fdadd8311 |
| children | 31103dbf1c26 |
| rev | line source |
|---|---|
| 0 | 1 /* Simple program: Move N sprites around on the screen as fast as possible */ |
| 2 | |
| 3 #include <stdio.h> | |
| 4 #include <stdlib.h> | |
| 5 #include <string.h> | |
| 6 #include <ctype.h> | |
|
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7 #include <math.h> |
| 0 | 8 #include <time.h> |
| 9 | |
| 10 #include "SDL.h" | |
| 11 | |
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12 #define DEBUG_FLIP 1 |
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13 |
| 0 | 14 #define NUM_SPRITES 100 |
| 15 #define MAX_SPEED 1 | |
| 16 | |
| 17 SDL_Surface *sprite; | |
| 18 int numsprites; | |
| 19 SDL_Rect *sprite_rects; | |
| 20 SDL_Rect *positions; | |
| 21 SDL_Rect *velocities; | |
| 22 int sprites_visible; | |
|
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23 Uint16 sprite_w, sprite_h; |
| 0 | 24 |
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parents:
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diff
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25 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
753
diff
changeset
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26 static void quit(int rc) |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
753
diff
changeset
|
27 { |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
753
diff
changeset
|
28 SDL_Quit(); |
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be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
753
diff
changeset
|
29 exit(rc); |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
753
diff
changeset
|
30 } |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
753
diff
changeset
|
31 |
| 0 | 32 int LoadSprite(SDL_Surface *screen, char *file) |
| 33 { | |
| 34 SDL_Surface *temp; | |
| 35 | |
| 36 /* Load the sprite image */ | |
| 37 sprite = SDL_LoadBMP(file); | |
| 38 if ( sprite == NULL ) { | |
| 39 fprintf(stderr, "Couldn't load %s: %s", file, SDL_GetError()); | |
| 40 return(-1); | |
| 41 } | |
| 42 | |
| 43 /* Set transparent pixel as the pixel at (0,0) */ | |
| 44 if ( sprite->format->palette ) { | |
| 45 SDL_SetColorKey(sprite, (SDL_SRCCOLORKEY|SDL_RLEACCEL), | |
| 46 *(Uint8 *)sprite->pixels); | |
| 47 } | |
| 48 | |
| 49 /* Convert sprite to video format */ | |
| 50 temp = SDL_DisplayFormat(sprite); | |
| 51 SDL_FreeSurface(sprite); | |
| 52 if ( temp == NULL ) { | |
| 53 fprintf(stderr, "Couldn't convert background: %s\n", | |
| 54 SDL_GetError()); | |
| 55 return(-1); | |
| 56 } | |
| 57 sprite = temp; | |
| 58 | |
| 59 /* We're ready to roll. :) */ | |
| 60 return(0); | |
| 61 } | |
| 62 | |
| 63 void MoveSprites(SDL_Surface *screen, Uint32 background) | |
| 64 { | |
| 65 int i, nupdates; | |
| 66 SDL_Rect area, *position, *velocity; | |
| 67 | |
| 68 nupdates = 0; | |
| 69 /* Erase all the sprites if necessary */ | |
| 70 if ( sprites_visible ) { | |
| 71 SDL_FillRect(screen, NULL, background); | |
| 72 } | |
| 73 | |
| 74 /* Move the sprite, bounce at the wall, and draw */ | |
| 75 for ( i=0; i<numsprites; ++i ) { | |
| 76 position = &positions[i]; | |
| 77 velocity = &velocities[i]; | |
| 78 position->x += velocity->x; | |
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79 if ( (position->x < 0) || (position->x >= (screen->w - sprite_w)) ) { |
| 0 | 80 velocity->x = -velocity->x; |
| 81 position->x += velocity->x; | |
| 82 } | |
| 83 position->y += velocity->y; | |
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84 if ( (position->y < 0) || (position->y >= (screen->h - sprite_w)) ) { |
| 0 | 85 velocity->y = -velocity->y; |
| 86 position->y += velocity->y; | |
| 87 } | |
| 88 | |
| 89 /* Blit the sprite onto the screen */ | |
| 90 area = *position; | |
| 91 SDL_BlitSurface(sprite, NULL, screen, &area); | |
| 92 sprite_rects[nupdates++] = area; | |
| 93 } | |
| 94 | |
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95 #if DEBUG_FLIP |
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96 { |
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97 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { |
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98 static int t = 0; |
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99 |
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100 Uint32 color = SDL_MapRGB (screen->format, 255, 0, 0); |
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101 SDL_Rect r; |
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102 r.x = (sin((float)t * 2 * 3.1459) + 1.0) / 2.0 * (screen->w-20); |
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103 r.y = 0; |
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104 r.w = 20; |
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105 r.h = screen->h; |
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106 |
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107 SDL_FillRect (screen, &r, color); |
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108 t+=2; |
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109 } |
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110 } |
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111 #endif |
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112 |
| 0 | 113 /* Update the screen! */ |
| 114 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { | |
| 115 SDL_Flip(screen); | |
| 116 } else { | |
| 117 SDL_UpdateRects(screen, nupdates, sprite_rects); | |
| 118 } | |
| 119 sprites_visible = 1; | |
| 120 } | |
| 121 | |
| 122 /* This is a way of telling whether or not to use hardware surfaces */ | |
|
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123 Uint32 FastestFlags(Uint32 flags, int width, int height, int bpp) |
| 0 | 124 { |
| 125 const SDL_VideoInfo *info; | |
| 126 | |
| 127 /* Hardware acceleration is only used in fullscreen mode */ | |
| 128 flags |= SDL_FULLSCREEN; | |
| 129 | |
| 130 /* Check for various video capabilities */ | |
| 131 info = SDL_GetVideoInfo(); | |
| 132 if ( info->blit_hw_CC && info->blit_fill ) { | |
| 133 /* We use accelerated colorkeying and color filling */ | |
| 134 flags |= SDL_HWSURFACE; | |
| 135 } | |
| 136 /* If we have enough video memory, and will use accelerated | |
| 137 blits directly to it, then use page flipping. | |
| 138 */ | |
| 139 if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
| 140 /* Direct hardware blitting without double-buffering | |
| 141 causes really bad flickering. | |
| 142 */ | |
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143 if ( info->video_mem*1024 > (height*width*bpp/8) ) { |
| 0 | 144 flags |= SDL_DOUBLEBUF; |
| 145 } else { | |
| 146 flags &= ~SDL_HWSURFACE; | |
| 147 } | |
| 148 } | |
| 149 | |
| 150 /* Return the flags */ | |
| 151 return(flags); | |
| 152 } | |
| 153 | |
| 154 int main(int argc, char *argv[]) | |
| 155 { | |
| 156 SDL_Surface *screen; | |
| 157 Uint8 *mem; | |
| 158 int width, height; | |
| 159 Uint8 video_bpp; | |
| 160 Uint32 videoflags; | |
| 161 Uint32 background; | |
| 162 int i, done; | |
| 163 SDL_Event event; | |
| 164 Uint32 then, now, frames; | |
| 165 | |
| 166 /* Initialize SDL */ | |
| 167 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 168 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
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Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
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parents:
753
diff
changeset
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169 return(1); |
| 0 | 170 } |
| 171 | |
| 172 numsprites = NUM_SPRITES; | |
| 173 videoflags = SDL_SWSURFACE|SDL_ANYFORMAT; | |
| 174 width = 640; | |
| 175 height = 480; | |
| 176 video_bpp = 8; | |
| 177 while ( argc > 1 ) { | |
| 178 --argc; | |
| 179 if ( strcmp(argv[argc-1], "-width") == 0 ) { | |
| 180 width = atoi(argv[argc]); | |
| 181 --argc; | |
| 182 } else | |
| 183 if ( strcmp(argv[argc-1], "-height") == 0 ) { | |
| 184 height = atoi(argv[argc]); | |
| 185 --argc; | |
| 186 } else | |
| 187 if ( strcmp(argv[argc-1], "-bpp") == 0 ) { | |
| 188 video_bpp = atoi(argv[argc]); | |
| 189 videoflags &= ~SDL_ANYFORMAT; | |
| 190 --argc; | |
| 191 } else | |
| 192 if ( strcmp(argv[argc], "-fast") == 0 ) { | |
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193 videoflags = FastestFlags(videoflags, width, height, video_bpp); |
| 0 | 194 } else |
| 195 if ( strcmp(argv[argc], "-hw") == 0 ) { | |
| 196 videoflags ^= SDL_HWSURFACE; | |
| 197 } else | |
| 198 if ( strcmp(argv[argc], "-flip") == 0 ) { | |
| 199 videoflags ^= SDL_DOUBLEBUF; | |
| 200 } else | |
| 201 if ( strcmp(argv[argc], "-fullscreen") == 0 ) { | |
| 202 videoflags ^= SDL_FULLSCREEN; | |
| 203 } else | |
| 204 if ( isdigit(argv[argc][0]) ) { | |
| 205 numsprites = atoi(argv[argc]); | |
| 206 } else { | |
| 207 fprintf(stderr, | |
| 208 "Usage: %s [-bpp N] [-hw] [-flip] [-fast] [-fullscreen] [numsprites]\n", | |
| 209 argv[0]); | |
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be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
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parents:
753
diff
changeset
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210 quit(1); |
| 0 | 211 } |
| 212 } | |
| 213 | |
| 214 /* Set video mode */ | |
| 215 screen = SDL_SetVideoMode(width, height, video_bpp, videoflags); | |
| 216 if ( ! screen ) { | |
| 217 fprintf(stderr, "Couldn't set %dx%d video mode: %s\n", | |
| 218 width, height, SDL_GetError()); | |
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be9c9c8f6d53
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parents:
753
diff
changeset
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219 quit(2); |
| 0 | 220 } |
| 221 | |
| 222 /* Load the sprite */ | |
| 223 if ( LoadSprite(screen, "icon.bmp") < 0 ) { | |
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Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
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parents:
753
diff
changeset
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224 quit(1); |
| 0 | 225 } |
| 226 | |
| 227 /* Allocate memory for the sprite info */ | |
| 228 mem = (Uint8 *)malloc(4*sizeof(SDL_Rect)*numsprites); | |
| 229 if ( mem == NULL ) { | |
| 230 SDL_FreeSurface(sprite); | |
| 231 fprintf(stderr, "Out of memory!\n"); | |
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parents:
753
diff
changeset
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232 quit(2); |
| 0 | 233 } |
| 234 sprite_rects = (SDL_Rect *)mem; | |
| 235 positions = sprite_rects; | |
| 236 sprite_rects += numsprites; | |
| 237 velocities = sprite_rects; | |
| 238 sprite_rects += numsprites; | |
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239 sprite_w = sprite->w; |
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240 sprite_h = sprite->h; |
| 0 | 241 srand(time(NULL)); |
| 242 for ( i=0; i<numsprites; ++i ) { | |
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243 positions[i].x = rand()%(screen->w - sprite_w); |
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244 positions[i].y = rand()%(screen->h - sprite_h); |
| 0 | 245 positions[i].w = sprite->w; |
| 246 positions[i].h = sprite->h; | |
| 247 velocities[i].x = 0; | |
| 248 velocities[i].y = 0; | |
| 249 while ( ! velocities[i].x && ! velocities[i].y ) { | |
| 250 velocities[i].x = (rand()%(MAX_SPEED*2+1))-MAX_SPEED; | |
| 251 velocities[i].y = (rand()%(MAX_SPEED*2+1))-MAX_SPEED; | |
| 252 } | |
| 253 } | |
| 254 background = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00); | |
| 255 | |
| 256 /* Print out information about our surfaces */ | |
| 257 printf("Screen is at %d bits per pixel\n",screen->format->BitsPerPixel); | |
| 258 if ( (screen->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
| 259 printf("Screen is in video memory\n"); | |
| 260 } else { | |
| 261 printf("Screen is in system memory\n"); | |
| 262 } | |
| 263 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { | |
| 264 printf("Screen has double-buffering enabled\n"); | |
| 265 } | |
| 266 if ( (sprite->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
| 267 printf("Sprite is in video memory\n"); | |
| 268 } else { | |
| 269 printf("Sprite is in system memory\n"); | |
| 270 } | |
| 271 /* Run a sample blit to trigger blit acceleration */ | |
| 272 { SDL_Rect dst; | |
| 273 dst.x = 0; | |
| 274 dst.y = 0; | |
| 275 dst.w = sprite->w; | |
| 276 dst.h = sprite->h; | |
| 277 SDL_BlitSurface(sprite, NULL, screen, &dst); | |
| 278 SDL_FillRect(screen, &dst, background); | |
| 279 } | |
| 280 if ( (sprite->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
| 281 printf("Sprite blit uses hardware acceleration\n"); | |
| 282 } | |
| 283 if ( (sprite->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { | |
| 284 printf("Sprite blit uses RLE acceleration\n"); | |
| 285 } | |
| 286 | |
| 287 /* Loop, blitting sprites and waiting for a keystroke */ | |
| 288 frames = 0; | |
| 289 then = SDL_GetTicks(); | |
| 290 done = 0; | |
| 291 sprites_visible = 0; | |
| 292 while ( !done ) { | |
| 293 /* Check for events */ | |
| 294 ++frames; | |
| 295 while ( SDL_PollEvent(&event) ) { | |
| 296 switch (event.type) { | |
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297 case SDL_MOUSEBUTTONDOWN: |
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298 SDL_WarpMouse(screen->w/2, screen->h/2); |
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299 break; |
| 0 | 300 case SDL_KEYDOWN: |
| 301 /* Any keypress quits the app... */ | |
| 302 case SDL_QUIT: | |
| 303 done = 1; | |
| 304 break; | |
| 305 default: | |
| 306 break; | |
| 307 } | |
| 308 } | |
| 309 MoveSprites(screen, background); | |
| 310 } | |
| 311 SDL_FreeSurface(sprite); | |
| 312 free(mem); | |
| 313 | |
| 314 /* Print out some timing information */ | |
| 315 now = SDL_GetTicks(); | |
| 316 if ( now > then ) { | |
| 317 printf("%2.2f frames per second\n", | |
| 318 ((double)frames*1000)/(now-then)); | |
| 319 } | |
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320 SDL_Quit(); |
| 0 | 321 return(0); |
| 322 } |