boolean SDLSetNativeSurface(SDL_Surface **);
SDL_Surface *SDLGetNativeSurface(SDL_Surface *);
SDL_Surface *SDLCreateNativeSurface(int, int, int);
+Bitmap *SDLGetBitmapFromSurface(SDL_Surface *);
void SDLCreateBitmapTextures(Bitmap *);
void SDLFreeBitmapTextures(Bitmap *);