void SDLInvertArea(Bitmap *, int, int, int, int, Uint32);
void SDLCopyInverseMasked(Bitmap *, Bitmap *, int, int, int, int, int, int);
void SDLInvertArea(Bitmap *, int, int, int, int, Uint32);
void SDLCopyInverseMasked(Bitmap *, Bitmap *, int, int, int, int, int, int);