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C-/C++-Quelltext

void MyColorKey(int R, int G, int B, SDL_Surface* sName)
{
    unsigned int mask = SDL_MapRGB(sName->format, &r, &g, &b);
    int status = SDL_SetColorKey(sName, SDL_SRCCOLORKEY, mask);
    if (status < 0) {
        printf("Fail!");
    }
}

C-/C++-Quelltext

#include <stdlib.h>
 #include <SDL/SDL.h>
 int main(int argc, char *argv[])
 {
     SDL_Surface *screen, *image;
     SDL_Rect dst;
     SDL_Event event;
     int done = 0;
     if (SDL_Init(SDL_INIT_VIDEO) == -1) {
         printf("Can't init SDL:  %s\n", SDL_GetError());
         exit(1);
     }
     atexit(SDL_Quit); 
     screen = SDL_SetVideoMode(640, 480, 16, SDL_HWSURFACE | SDL_DOUBLEBUF);
     if (screen == NULL) {
         printf("Can't set video mode: %s\n", SDL_GetError());
         exit(1);
     }
     SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 255));
     image = SDL_LoadBMP("tux.bmp");
     if (image == NULL) {
         printf("Can't load image of tux: %s\n", SDL_GetError());
         exit(1);
     }
     dst.x = 200;
     dst.y = 200;
     dst.w = image->w;
     dst.h = image->h;
     SDL_SetColorKey(image, SDL_SRCCOLORKEY, SDL_MapRGB(image->format, 255, 0, 0));
     SDL_BlitSurface(image, NULL, screen, &dst);
     SDL_FreeSurface(image);
     SDL_Flip(screen);
     while (!done) {
         while (SDL_PollEvent(&event)) {
             switch (event.type) {
             case SDL_QUIT:
                 done = 1;
                 break;
             }
         }
     }
     return 0;
 }