[Xorg] X on OpenGL

Ian Romanick idr at us.ibm.com
Sun Jul 11 10:31:54 PDT 2004

Soeren Sandmann wrote:

> - vblank notification
> OpenGL doesn't deal with this at all. Applications will want a Sync
> counter to block on. To do that the server needs to be notified when
> vblank starts. Ideally it would be possible to get notifications when
> the beam reaches a given scanline.

There are OpenGL extensions to support this functionality, and several 
of the open-source drivers support some of them.  See the following:


If they don't cover all the functionality that apps need, we can define 
our own extensions that do.

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