boolean SDLSetNativeSurface(SDL_Surface **);
SDL_Surface *SDLGetNativeSurface(SDL_Surface *);
void SDLCreateBitmapTextures(Bitmap *);
boolean SDLSetNativeSurface(SDL_Surface **);
SDL_Surface *SDLGetNativeSurface(SDL_Surface *);
void SDLCreateBitmapTextures(Bitmap *);