How do I wait for vertical retrace?

[Carsten Haitzler (The Rasterman)]

On Tue, 06 May 2008 12:46:06 -0400 Chuck Robey <chuckr at chuckr.org> babbled:

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> Nicolas George wrote:
> > L'octidi 18 floréal, an CCXVI, Johan Walles a écrit :
> >> I don't care about vertical retrace in itself, waiting for vertical
> >> retrace would only be a way for me to achieve flicker-free animation
> >> in a 2D application.
> > 
> > DOUBLE-BUFFER is no good for that: when used for continuous animation (such
> > as video), it causes exactly as much tearing as a simple bitmap copy. At
> > least it was true in November 2006.
> 
> That seems odd.  I'm currently reading the OpenGL Redbook (their latest
> programming manual) and it seems to be directly contradicting you.  I haven't
> tried it yet myself, though, but still, are you sure about that statement?
> What they say does seem to make sense.

opengl is not related to the x doulebuffer extension... :)

> > 
> > Regards,
> > 
> > 
> > 
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The Rasterman (Carsten Haitzler)    raster at rasterman.com