func PolygonStipple(mask *uint8) {
	syscall.Syscall(gpPolygonStipple, 1, uintptr(unsafe.Pointer(mask)), 0, 0)
}
func PolygonStipple(mask *uint8) {
	syscall.Syscall(gpPolygonStipple, 1, uintptr(unsafe.Pointer(mask)), 0, 0)
}
// set the polygon stippling pattern