How do I wait for vertical retrace?

[Michel Dänzer]

On Mon, 2008-05-05 at 15:43 +0100, Samuel Thibault wrote:
> 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?

You mean DOUBLE-BUFFER? I'm not really familiar with it, but I know that
at this time it can't synchronize buffer swaps to the refresh.


-- 
Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer