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 *);
void SDLCopyInverseMasked(Bitmap *, Bitmap *, int, int, int, int, int, int);
+SDL_Surface *SDLZoomSurface(SDL_Surface *, int, int);
Bitmap *SDLZoomBitmap(Bitmap *, int, int);
Bitmap *SDLLoadImage(char *);