void glfwCenterWindow(GLFWwindow *window, GLFWmonitor *monitor)
{
	const	GLFWvidmode	*mode	= glfwGetVideoMode(monitor);
	int	monitor_width		= mode->width;
	int	monitor_height		= mode->height;

	int	window_width		= 0;
	int	window_height		= 0;

	glfwGetWindowSize		(window, &window_width, &window_height);

	int	window_pos_x		= (monitor_width  - window_width)  >> 1;
	int	window_pos_y		= (monitor_height - window_height) >> 1;

	glfwSetWindowPos		(window, window_pos_x, window_pos_y);
}