extern public static void XRenderFillRectangles(IntPtr x11display, TInt operation, IntPtr pictureDestination, ref XRenderColor color, ref X11lib.XRectangle rectangles, TInt numRects);
extern public static void XRenderFillRectangle(IntPtr x11display, TInt xRenderPictureOp, IntPtr pictureDestination, ref XRenderColor color, TInt x, TInt y, TUint width, TUint height);