Mercurial > sdl-ios-xcode
annotate test/testsprite.c @ 273:72acb06d3721
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 22 Jan 2002 21:14:36 +0000 |
| parents | 01fcac5d146e |
| children | 2f5a6062db86 |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 /* Simple program: Move N sprites around on the screen as fast as possible */ | |
| 3 | |
| 4 #include <stdio.h> | |
| 5 #include <stdlib.h> | |
| 6 #include <string.h> | |
| 7 #include <ctype.h> | |
| 8 #include <time.h> | |
| 9 | |
| 10 #include "SDL.h" | |
| 11 | |
| 12 #define NUM_SPRITES 100 | |
| 13 #define MAX_SPEED 1 | |
| 14 | |
| 15 SDL_Surface *sprite; | |
| 16 int numsprites; | |
| 17 SDL_Rect *sprite_rects; | |
| 18 SDL_Rect *positions; | |
| 19 SDL_Rect *velocities; | |
| 20 int sprites_visible; | |
| 21 | |
| 22 int LoadSprite(SDL_Surface *screen, char *file) | |
| 23 { | |
| 24 SDL_Surface *temp; | |
| 25 | |
| 26 /* Load the sprite image */ | |
| 27 sprite = SDL_LoadBMP(file); | |
| 28 if ( sprite == NULL ) { | |
| 29 fprintf(stderr, "Couldn't load %s: %s", file, SDL_GetError()); | |
| 30 return(-1); | |
| 31 } | |
| 32 | |
| 33 /* Set transparent pixel as the pixel at (0,0) */ | |
| 34 if ( sprite->format->palette ) { | |
| 35 SDL_SetColorKey(sprite, (SDL_SRCCOLORKEY|SDL_RLEACCEL), | |
| 36 *(Uint8 *)sprite->pixels); | |
| 37 } | |
| 38 | |
| 39 /* Convert sprite to video format */ | |
| 40 temp = SDL_DisplayFormat(sprite); | |
| 41 SDL_FreeSurface(sprite); | |
| 42 if ( temp == NULL ) { | |
| 43 fprintf(stderr, "Couldn't convert background: %s\n", | |
| 44 SDL_GetError()); | |
| 45 return(-1); | |
| 46 } | |
| 47 sprite = temp; | |
| 48 | |
| 49 /* We're ready to roll. :) */ | |
| 50 return(0); | |
| 51 } | |
| 52 | |
| 53 void MoveSprites(SDL_Surface *screen, Uint32 background) | |
| 54 { | |
| 55 int i, nupdates; | |
| 56 SDL_Rect area, *position, *velocity; | |
| 57 | |
| 58 nupdates = 0; | |
| 59 /* Erase all the sprites if necessary */ | |
| 60 if ( sprites_visible ) { | |
| 61 SDL_FillRect(screen, NULL, background); | |
| 62 } | |
| 63 | |
| 64 /* Move the sprite, bounce at the wall, and draw */ | |
| 65 for ( i=0; i<numsprites; ++i ) { | |
| 66 position = &positions[i]; | |
| 67 velocity = &velocities[i]; | |
| 68 position->x += velocity->x; | |
| 69 if ( (position->x < 0) || (position->x >= screen->w) ) { | |
| 70 velocity->x = -velocity->x; | |
| 71 position->x += velocity->x; | |
| 72 } | |
| 73 position->y += velocity->y; | |
| 74 if ( (position->y < 0) || (position->y >= screen->h) ) { | |
| 75 velocity->y = -velocity->y; | |
| 76 position->y += velocity->y; | |
| 77 } | |
| 78 | |
| 79 /* Blit the sprite onto the screen */ | |
| 80 area = *position; | |
| 81 SDL_BlitSurface(sprite, NULL, screen, &area); | |
| 82 sprite_rects[nupdates++] = area; | |
| 83 } | |
| 84 | |
| 85 /* Update the screen! */ | |
| 86 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { | |
| 87 SDL_Flip(screen); | |
| 88 } else { | |
| 89 SDL_UpdateRects(screen, nupdates, sprite_rects); | |
| 90 } | |
| 91 sprites_visible = 1; | |
| 92 } | |
| 93 | |
| 94 /* This is a way of telling whether or not to use hardware surfaces */ | |
|
107
01fcac5d146e
Fixed crash in testsprite when using the -fast option (nobody caught this?)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
95 Uint32 FastestFlags(Uint32 flags, int width, int height, int bpp) |
| 0 | 96 { |
| 97 const SDL_VideoInfo *info; | |
| 98 | |
| 99 /* Hardware acceleration is only used in fullscreen mode */ | |
| 100 flags |= SDL_FULLSCREEN; | |
| 101 | |
| 102 /* Check for various video capabilities */ | |
| 103 info = SDL_GetVideoInfo(); | |
| 104 if ( info->blit_hw_CC && info->blit_fill ) { | |
| 105 /* We use accelerated colorkeying and color filling */ | |
| 106 flags |= SDL_HWSURFACE; | |
| 107 } | |
| 108 /* If we have enough video memory, and will use accelerated | |
| 109 blits directly to it, then use page flipping. | |
| 110 */ | |
| 111 if ( (flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
| 112 /* Direct hardware blitting without double-buffering | |
| 113 causes really bad flickering. | |
| 114 */ | |
|
107
01fcac5d146e
Fixed crash in testsprite when using the -fast option (nobody caught this?)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
115 if ( info->video_mem*1024 > (height*width*bpp/8) ) { |
| 0 | 116 flags |= SDL_DOUBLEBUF; |
| 117 } else { | |
| 118 flags &= ~SDL_HWSURFACE; | |
| 119 } | |
| 120 } | |
| 121 | |
| 122 /* Return the flags */ | |
| 123 return(flags); | |
| 124 } | |
| 125 | |
| 126 int main(int argc, char *argv[]) | |
| 127 { | |
| 128 SDL_Surface *screen; | |
| 129 Uint8 *mem; | |
| 130 int width, height; | |
| 131 Uint8 video_bpp; | |
| 132 Uint32 videoflags; | |
| 133 Uint32 background; | |
| 134 int i, done; | |
| 135 SDL_Event event; | |
| 136 Uint32 then, now, frames; | |
| 137 | |
| 138 /* Initialize SDL */ | |
| 139 if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) { | |
| 140 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
| 141 exit(1); | |
| 142 } | |
| 143 atexit(SDL_Quit); | |
| 144 | |
| 145 numsprites = NUM_SPRITES; | |
| 146 videoflags = SDL_SWSURFACE|SDL_ANYFORMAT; | |
| 147 width = 640; | |
| 148 height = 480; | |
| 149 video_bpp = 8; | |
| 150 while ( argc > 1 ) { | |
| 151 --argc; | |
| 152 if ( strcmp(argv[argc-1], "-width") == 0 ) { | |
| 153 width = atoi(argv[argc]); | |
| 154 --argc; | |
| 155 } else | |
| 156 if ( strcmp(argv[argc-1], "-height") == 0 ) { | |
| 157 height = atoi(argv[argc]); | |
| 158 --argc; | |
| 159 } else | |
| 160 if ( strcmp(argv[argc-1], "-bpp") == 0 ) { | |
| 161 video_bpp = atoi(argv[argc]); | |
| 162 videoflags &= ~SDL_ANYFORMAT; | |
| 163 --argc; | |
| 164 } else | |
| 165 if ( strcmp(argv[argc], "-fast") == 0 ) { | |
|
107
01fcac5d146e
Fixed crash in testsprite when using the -fast option (nobody caught this?)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
166 videoflags = FastestFlags(videoflags, width, height, video_bpp); |
| 0 | 167 } else |
| 168 if ( strcmp(argv[argc], "-hw") == 0 ) { | |
| 169 videoflags ^= SDL_HWSURFACE; | |
| 170 } else | |
| 171 if ( strcmp(argv[argc], "-flip") == 0 ) { | |
| 172 videoflags ^= SDL_DOUBLEBUF; | |
| 173 } else | |
| 174 if ( strcmp(argv[argc], "-fullscreen") == 0 ) { | |
| 175 videoflags ^= SDL_FULLSCREEN; | |
| 176 } else | |
| 177 if ( isdigit(argv[argc][0]) ) { | |
| 178 numsprites = atoi(argv[argc]); | |
| 179 } else { | |
| 180 fprintf(stderr, | |
| 181 "Usage: %s [-bpp N] [-hw] [-flip] [-fast] [-fullscreen] [numsprites]\n", | |
| 182 argv[0]); | |
| 183 exit(1); | |
| 184 } | |
| 185 } | |
| 186 | |
| 187 /* Set video mode */ | |
| 188 screen = SDL_SetVideoMode(width, height, video_bpp, videoflags); | |
| 189 if ( ! screen ) { | |
| 190 fprintf(stderr, "Couldn't set %dx%d video mode: %s\n", | |
| 191 width, height, SDL_GetError()); | |
| 192 exit(2); | |
| 193 } | |
| 194 | |
| 195 /* Load the sprite */ | |
| 196 if ( LoadSprite(screen, "icon.bmp") < 0 ) { | |
| 197 exit(1); | |
| 198 } | |
| 199 | |
| 200 /* Allocate memory for the sprite info */ | |
| 201 mem = (Uint8 *)malloc(4*sizeof(SDL_Rect)*numsprites); | |
| 202 if ( mem == NULL ) { | |
| 203 SDL_FreeSurface(sprite); | |
| 204 fprintf(stderr, "Out of memory!\n"); | |
| 205 exit(2); | |
| 206 } | |
| 207 sprite_rects = (SDL_Rect *)mem; | |
| 208 positions = sprite_rects; | |
| 209 sprite_rects += numsprites; | |
| 210 velocities = sprite_rects; | |
| 211 sprite_rects += numsprites; | |
| 212 srand(time(NULL)); | |
| 213 for ( i=0; i<numsprites; ++i ) { | |
| 214 positions[i].x = rand()%screen->w; | |
| 215 positions[i].y = rand()%screen->h; | |
| 216 positions[i].w = sprite->w; | |
| 217 positions[i].h = sprite->h; | |
| 218 velocities[i].x = 0; | |
| 219 velocities[i].y = 0; | |
| 220 while ( ! velocities[i].x && ! velocities[i].y ) { | |
| 221 velocities[i].x = (rand()%(MAX_SPEED*2+1))-MAX_SPEED; | |
| 222 velocities[i].y = (rand()%(MAX_SPEED*2+1))-MAX_SPEED; | |
| 223 } | |
| 224 } | |
| 225 background = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00); | |
| 226 | |
| 227 /* Print out information about our surfaces */ | |
| 228 printf("Screen is at %d bits per pixel\n",screen->format->BitsPerPixel); | |
| 229 if ( (screen->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
| 230 printf("Screen is in video memory\n"); | |
| 231 } else { | |
| 232 printf("Screen is in system memory\n"); | |
| 233 } | |
| 234 if ( (screen->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF ) { | |
| 235 printf("Screen has double-buffering enabled\n"); | |
| 236 } | |
| 237 if ( (sprite->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) { | |
| 238 printf("Sprite is in video memory\n"); | |
| 239 } else { | |
| 240 printf("Sprite is in system memory\n"); | |
| 241 } | |
| 242 /* Run a sample blit to trigger blit acceleration */ | |
| 243 { SDL_Rect dst; | |
| 244 dst.x = 0; | |
| 245 dst.y = 0; | |
| 246 dst.w = sprite->w; | |
| 247 dst.h = sprite->h; | |
| 248 SDL_BlitSurface(sprite, NULL, screen, &dst); | |
| 249 SDL_FillRect(screen, &dst, background); | |
| 250 } | |
| 251 if ( (sprite->flags & SDL_HWACCEL) == SDL_HWACCEL ) { | |
| 252 printf("Sprite blit uses hardware acceleration\n"); | |
| 253 } | |
| 254 if ( (sprite->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) { | |
| 255 printf("Sprite blit uses RLE acceleration\n"); | |
| 256 } | |
| 257 | |
| 258 /* Loop, blitting sprites and waiting for a keystroke */ | |
| 259 frames = 0; | |
| 260 then = SDL_GetTicks(); | |
| 261 done = 0; | |
| 262 sprites_visible = 0; | |
| 263 while ( !done ) { | |
| 264 /* Check for events */ | |
| 265 ++frames; | |
| 266 while ( SDL_PollEvent(&event) ) { | |
| 267 switch (event.type) { | |
| 268 case SDL_KEYDOWN: | |
| 269 /* Any keypress quits the app... */ | |
| 270 case SDL_QUIT: | |
| 271 done = 1; | |
| 272 break; | |
| 273 default: | |
| 274 break; | |
| 275 } | |
| 276 } | |
| 277 MoveSprites(screen, background); | |
| 278 } | |
| 279 SDL_FreeSurface(sprite); | |
| 280 free(mem); | |
| 281 | |
| 282 /* Print out some timing information */ | |
| 283 now = SDL_GetTicks(); | |
| 284 if ( now > then ) { | |
| 285 printf("%2.2f frames per second\n", | |
| 286 ((double)frames*1000)/(now-then)); | |
| 287 } | |
| 288 return(0); | |
| 289 } |