Mercurial > sdl-ios-xcode
annotate test/testsprite.c @ 1025:3652d111416c
Avoid gcc parse errors on Win32. This is fine in general because gcc uses
the cdecl calling convention by default.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 08 Jan 2005 23:13:01 +0000 |
| parents | b14fdadd8311 |
| children | be9c9c8f6d53 |
| 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 |
| 25 int LoadSprite(SDL_Surface *screen, char *file) | |
| 26 { | |
| 27 SDL_Surface *temp; | |
| 28 | |
| 29 /* Load the sprite image */ | |
| 30 sprite = SDL_LoadBMP(file); | |
| 31 if ( sprite == NULL ) { | |
| 32 fprintf(stderr, "Couldn't load %s: %s", file, SDL_GetError()); | |
| 33 return(-1); | |
| 34 } | |
| 35 | |
| 36 /* Set transparent pixel as the pixel at (0,0) */ | |
| 37 if ( sprite->format->palette ) { | |
| 38 SDL_SetColorKey(sprite, (SDL_SRCCOLORKEY|SDL_RLEACCEL), | |
| 39 *(Uint8 *)sprite->pixels); | |
| 40 } | |
| 41 | |
| 42 /* Convert sprite to video format */ | |
| 43 temp = SDL_DisplayFormat(sprite); | |
| 44 SDL_FreeSurface(sprite); | |
| 45 if ( temp == NULL ) { | |
| 46 fprintf(stderr, "Couldn't convert background: %s\n", | |
| 47 SDL_GetError()); | |
| 48 return(-1); | |
| 49 } | |
| 50 sprite = temp; | |
| 51 | |
| 52 /* We're ready to roll. :) */ | |
| 53 return(0); | |
| 54 } | |
| 55 | |
| 56 void MoveSprites(SDL_Surface *screen, Uint32 background) | |
| 57 { | |
| 58 int i, nupdates; | |
| 59 SDL_Rect area, *position, *velocity; | |
| 60 | |
| 61 nupdates = 0; | |
| 62 /* Erase all the sprites if necessary */ | |
| 63 if ( sprites_visible ) { | |
| 64 SDL_FillRect(screen, NULL, background); | |
| 65 } | |
| 66 | |
| 67 /* Move the sprite, bounce at the wall, and draw */ | |
| 68 for ( i=0; i<numsprites; ++i ) { | |
| 69 position = &positions[i]; | |
| 70 velocity = &velocities[i]; | |
| 71 position->x += velocity->x; | |
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72 if ( (position->x < 0) || (position->x >= (screen->w - sprite_w)) ) { |
| 0 | 73 velocity->x = -velocity->x; |
| 74 position->x += velocity->x; | |
| 75 } | |
| 76 position->y += velocity->y; | |
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77 if ( (position->y < 0) || (position->y >= (screen->h - sprite_w)) ) { |
| 0 | 78 velocity->y = -velocity->y; |
| 79 position->y += velocity->y; | |
| 80 } | |
| 81 | |
| 82 /* Blit the sprite onto the screen */ | |
| 83 area = *position; | |
| 84 SDL_BlitSurface(sprite, NULL, screen, &area); | |
| 85 sprite_rects[nupdates++] = area; | |
| 86 } | |
| 87 | |
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88 #if DEBUG_FLIP |
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89 { |
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90 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { |
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91 static int t = 0; |
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92 |
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93 Uint32 color = SDL_MapRGB (screen->format, 255, 0, 0); |
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94 SDL_Rect r; |
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95 r.x = (sin((float)t * 2 * 3.1459) + 1.0) / 2.0 * (screen->w-20); |
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96 r.y = 0; |
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97 r.w = 20; |
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98 r.h = screen->h; |
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99 |
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100 SDL_FillRect (screen, &r, color); |
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101 t+=2; |
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102 } |
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103 } |
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104 #endif |
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parents:
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105 |
| 0 | 106 /* Update the screen! */ |
| 107 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { | |
| 108 SDL_Flip(screen); | |
| 109 } else { | |
| 110 SDL_UpdateRects(screen, nupdates, sprite_rects); | |
| 111 } | |
| 112 sprites_visible = 1; | |
| 113 } | |
| 114 | |
| 115 /* This is a way of telling whether or not to use hardware surfaces */ | |
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116 Uint32 FastestFlags(Uint32 flags, int width, int height, int bpp) |
| 0 | 117 { |
| 118 const SDL_VideoInfo *info; | |
| 119 | |
| 120 /* Hardware acceleration is only used in fullscreen mode */ | |
| 121 flags |= SDL_FULLSCREEN; | |
| 122 | |
| 123 /* Check for various video capabilities */ | |
| 124 info = SDL_GetVideoInfo(); | |
| 125 if ( info->blit_hw_CC && info->blit_fill ) { | |
| 126 /* We use accelerated colorkeying and color filling */ | |
| 127 flags |= SDL_HWSURFACE; | |
| 128 } | |
| 129 /* If we have enough video memory, and will use accelerated | |
| 130 blits directly to it, then use page flipping. | |
| 131 */ | |
| 132 if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
| 133 /* Direct hardware blitting without double-buffering | |
| 134 causes really bad flickering. | |
| 135 */ | |
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136 if ( info->video_mem*1024 > (height*width*bpp/8) ) { |
| 0 | 137 flags |= SDL_DOUBLEBUF; |
| 138 } else { | |
| 139 flags &= ~SDL_HWSURFACE; | |
| 140 } | |
| 141 } | |
| 142 | |
| 143 /* Return the flags */ | |
| 144 return(flags); | |
| 145 } | |
| 146 | |
| 147 int main(int argc, char *argv[]) | |
| 148 { | |
| 149 SDL_Surface *screen; | |
| 150 Uint8 *mem; | |
| 151 int width, height; | |
| 152 Uint8 video_bpp; | |
| 153 Uint32 videoflags; | |
| 154 Uint32 background; | |
| 155 int i, done; | |
| 156 SDL_Event event; | |
| 157 Uint32 then, now, frames; | |
| 158 | |
| 159 /* Initialize SDL */ | |
| 160 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 161 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
| 162 exit(1); | |
| 163 } | |
| 164 atexit(SDL_Quit); | |
| 165 | |
| 166 numsprites = NUM_SPRITES; | |
| 167 videoflags = SDL_SWSURFACE|SDL_ANYFORMAT; | |
| 168 width = 640; | |
| 169 height = 480; | |
| 170 video_bpp = 8; | |
| 171 while ( argc > 1 ) { | |
| 172 --argc; | |
| 173 if ( strcmp(argv[argc-1], "-width") == 0 ) { | |
| 174 width = atoi(argv[argc]); | |
| 175 --argc; | |
| 176 } else | |
| 177 if ( strcmp(argv[argc-1], "-height") == 0 ) { | |
| 178 height = atoi(argv[argc]); | |
| 179 --argc; | |
| 180 } else | |
| 181 if ( strcmp(argv[argc-1], "-bpp") == 0 ) { | |
| 182 video_bpp = atoi(argv[argc]); | |
| 183 videoflags &= ~SDL_ANYFORMAT; | |
| 184 --argc; | |
| 185 } else | |
| 186 if ( strcmp(argv[argc], "-fast") == 0 ) { | |
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187 videoflags = FastestFlags(videoflags, width, height, video_bpp); |
| 0 | 188 } else |
| 189 if ( strcmp(argv[argc], "-hw") == 0 ) { | |
| 190 videoflags ^= SDL_HWSURFACE; | |
| 191 } else | |
| 192 if ( strcmp(argv[argc], "-flip") == 0 ) { | |
| 193 videoflags ^= SDL_DOUBLEBUF; | |
| 194 } else | |
| 195 if ( strcmp(argv[argc], "-fullscreen") == 0 ) { | |
| 196 videoflags ^= SDL_FULLSCREEN; | |
| 197 } else | |
| 198 if ( isdigit(argv[argc][0]) ) { | |
| 199 numsprites = atoi(argv[argc]); | |
| 200 } else { | |
| 201 fprintf(stderr, | |
| 202 "Usage: %s [-bpp N] [-hw] [-flip] [-fast] [-fullscreen] [numsprites]\n", | |
| 203 argv[0]); | |
| 204 exit(1); | |
| 205 } | |
| 206 } | |
| 207 | |
| 208 /* Set video mode */ | |
| 209 screen = SDL_SetVideoMode(width, height, video_bpp, videoflags); | |
| 210 if ( ! screen ) { | |
| 211 fprintf(stderr, "Couldn't set %dx%d video mode: %s\n", | |
| 212 width, height, SDL_GetError()); | |
| 213 exit(2); | |
| 214 } | |
| 215 | |
| 216 /* Load the sprite */ | |
| 217 if ( LoadSprite(screen, "icon.bmp") < 0 ) { | |
| 218 exit(1); | |
| 219 } | |
| 220 | |
| 221 /* Allocate memory for the sprite info */ | |
| 222 mem = (Uint8 *)malloc(4*sizeof(SDL_Rect)*numsprites); | |
| 223 if ( mem == NULL ) { | |
| 224 SDL_FreeSurface(sprite); | |
| 225 fprintf(stderr, "Out of memory!\n"); | |
| 226 exit(2); | |
| 227 } | |
| 228 sprite_rects = (SDL_Rect *)mem; | |
| 229 positions = sprite_rects; | |
| 230 sprite_rects += numsprites; | |
| 231 velocities = sprite_rects; | |
| 232 sprite_rects += numsprites; | |
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233 sprite_w = sprite->w; |
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234 sprite_h = sprite->h; |
| 0 | 235 srand(time(NULL)); |
| 236 for ( i=0; i<numsprites; ++i ) { | |
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237 positions[i].x = rand()%(screen->w - sprite_w); |
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238 positions[i].y = rand()%(screen->h - sprite_h); |
| 0 | 239 positions[i].w = sprite->w; |
| 240 positions[i].h = sprite->h; | |
| 241 velocities[i].x = 0; | |
| 242 velocities[i].y = 0; | |
| 243 while ( ! velocities[i].x && ! velocities[i].y ) { | |
| 244 velocities[i].x = (rand()%(MAX_SPEED*2+1))-MAX_SPEED; | |
| 245 velocities[i].y = (rand()%(MAX_SPEED*2+1))-MAX_SPEED; | |
| 246 } | |
| 247 } | |
| 248 background = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00); | |
| 249 | |
| 250 /* Print out information about our surfaces */ | |
| 251 printf("Screen is at %d bits per pixel\n",screen->format->BitsPerPixel); | |
| 252 if ( (screen->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
| 253 printf("Screen is in video memory\n"); | |
| 254 } else { | |
| 255 printf("Screen is in system memory\n"); | |
| 256 } | |
| 257 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { | |
| 258 printf("Screen has double-buffering enabled\n"); | |
| 259 } | |
| 260 if ( (sprite->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
| 261 printf("Sprite is in video memory\n"); | |
| 262 } else { | |
| 263 printf("Sprite is in system memory\n"); | |
| 264 } | |
| 265 /* Run a sample blit to trigger blit acceleration */ | |
| 266 { SDL_Rect dst; | |
| 267 dst.x = 0; | |
| 268 dst.y = 0; | |
| 269 dst.w = sprite->w; | |
| 270 dst.h = sprite->h; | |
| 271 SDL_BlitSurface(sprite, NULL, screen, &dst); | |
| 272 SDL_FillRect(screen, &dst, background); | |
| 273 } | |
| 274 if ( (sprite->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
| 275 printf("Sprite blit uses hardware acceleration\n"); | |
| 276 } | |
| 277 if ( (sprite->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { | |
| 278 printf("Sprite blit uses RLE acceleration\n"); | |
| 279 } | |
| 280 | |
| 281 /* Loop, blitting sprites and waiting for a keystroke */ | |
| 282 frames = 0; | |
| 283 then = SDL_GetTicks(); | |
| 284 done = 0; | |
| 285 sprites_visible = 0; | |
| 286 while ( !done ) { | |
| 287 /* Check for events */ | |
| 288 ++frames; | |
| 289 while ( SDL_PollEvent(&event) ) { | |
| 290 switch (event.type) { | |
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291 case SDL_MOUSEBUTTONDOWN: |
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292 SDL_WarpMouse(screen->w/2, screen->h/2); |
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293 break; |
| 0 | 294 case SDL_KEYDOWN: |
| 295 /* Any keypress quits the app... */ | |
| 296 case SDL_QUIT: | |
| 297 done = 1; | |
| 298 break; | |
| 299 default: | |
| 300 break; | |
| 301 } | |
| 302 } | |
| 303 MoveSprites(screen, background); | |
| 304 } | |
| 305 SDL_FreeSurface(sprite); | |
| 306 free(mem); | |
| 307 | |
| 308 /* Print out some timing information */ | |
| 309 now = SDL_GetTicks(); | |
| 310 if ( now > then ) { | |
| 311 printf("%2.2f frames per second\n", | |
| 312 ((double)frames*1000)/(now-then)); | |
| 313 } | |
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314 SDL_Quit(); |
| 0 | 315 return(0); |
| 316 } |