How do I wait for vertical retrace?

[Samuel Thibault]

Michel Dänzer, le Mon 05 May 2008 10:22:19 +0200, a écrit :
> On Sun, 2008-05-04 at 20:06 +0200, Johan Walles wrote:
> > 
> > I would like to wait for vertical retrace in an X application.  How
> > can I do that?
> > 
> > The point would be to avoid flicker in my app by using double
> > buffering and update the on-screen image during vertical retrace.
> 
> There's no mechanism for this yet in X. Your best bet is probably to use
> OpenGL, e.g. the GLX_SGI_swap_control extension.

Isn't there a more simple double buffering X extension?

Samuel