/* rects.c SDL Example Show some rectangles Bill Kendrick 12/1999 */ #include <stdio.h> #include <stdlib.h> #include <SDL/SDL.h> int main(int argc, char * argv[]) { SDL_Surface * scr; SDL_Rect rect; int i; Uint8 r, g, b; /* Init SDL: */ if (SDL_Init(SDL_INIT_VIDEO) < 0 ) { fprintf(stderr, "Can't init: %s\n", SDL_GetError()); exit(1); } /* Open screen: */ scr = SDL_SetVideoMode(640, 480, 16, SDL_HWSURFACE); for (i = 0; i < 64; i++) { /* Determine where to draw rect: */ rect.x = i * 10; rect.y = i * 7; rect.w = 100; rect.h = 50; /* What color should it be? */ r = (i * 4); g = ((64 - i) * 4); b = (i % 4) * 64; /* Draw a rectangle on the screen: */ SDL_FillRect(scr, &rect, SDL_MapRGB(scr->format, r, g, b)); SDL_UpdateRect(scr, rect.x, rect.y, rect.w, rect.h); } /* Wait five seconds: */ SDL_Delay(5000); /* Quit: */ SDL_Quit(); return(0); }