func ColorMaterial(face uint32, mode uint32) {
	syscall.Syscall(gpColorMaterial, 2, uintptr(face), uintptr(mode), 0)
}
func ColorMaterial(face uint32, mode uint32) {
	syscall.Syscall(gpColorMaterial, 2, uintptr(face), uintptr(mode), 0)
}
// cause a material color to track the current color