func DebugMessageCallback(callback unsafe.Pointer, userParam unsafe.Pointer) {
	syscall.Syscall(gpDebugMessageCallback, 2, syscall.NewCallback(callback), uintptr(userParam), 0)
}
func DebugMessageCallback(callback unsafe.Pointer, userParam unsafe.Pointer) {
	syscall.Syscall(gpDebugMessageCallback, 2, syscall.NewCallback(callback), uintptr(userParam), 0)
}
// specify a callback to receive debugging messages from the GL
// Parameter callback has type C.GLDEBUGPROC.