GLX_SGIX_swap_barrier
https://www.khronos.org/registry/egl/specs/eglspec.1.5.pdf
GLX_SGIX_swap_barrier

	void glXBindSwapBarrierSGIX (Display* dpy, GLXDrawable drawable, int barrier)
	Bool glXQueryMaxSwapBarriersSGIX (Display* dpy, int screen, int* max)