virtual void drawBitmap( const GenericBitmap &rBitmap, int xSrc = 0,
int ySrc = 0, int xDest = 0, int yDest = 0,
int width = -1, int height = -1,
virtual void drawBitmap( const GenericBitmap &rBitmap, int xSrc = 0,
int ySrc = 0, int xDest = 0, int yDest = 0,
int width = -1, int height = -1,