include/palettetoact.c

   1 #include <SDL.h>
   2
   3 int main(int argc, char *argv[])
   4 {
   5   SDL_Surface *surf;
   6   int i;
   7
   8   SDL_Init(SDL_INIT_EVERYTHING);
   9
  10   if (argc!=2) {
  11         printf("Usage: %s <filename>\n", argv[0]);
  12         return 1;
  13   }
  14
  15   surf=SDL_LoadBMP(argv[1]);
  16   if (!surf) {
  17         printf("Error: %s\n", SDL_GetError());
  18         return 2;
  19   }
  20
  21   for (i=0; i<256; i++) {
  22         int x, y;
  23         unsigned char *pixel;
  24
  25         x=(i%16)*9;
  26         y=(i/16)*6;
  27
  28         pixel=(char *) surf->pixels + y*surf->pitch;
  29         pixel+=x*surf->format->BytesPerPixel;
  30
  31         printf("%c%c%c", pixel[2], pixel[1], pixel[0]);
  32   }
  33 }