Pixel SDLGetPixel(Bitmap *, int, int);
void SDLPutPixel(Bitmap *, int, int, Pixel);
-void SDLInvertArea(Bitmap *, int, int, int, int, Uint32);
void SDLCopyInverseMasked(Bitmap *, Bitmap *, int, int, int, int, int, int);
Bitmap *SDLZoomBitmap(Bitmap *, int, int);