On Tue, 2004-03-09 at 19:44, Ian Romanick wrote:
> 
> Excluding the pageflip case, in the "current" setup we have an 
> offscreen backbuffer that needs to be copied to the frontbuffer.  This 
> happens completely under the control of the 3D driver.  With composite, 
> are both the backbuffer and the frontbuffer offscreen?  

Yes.

> In that case the 3D driver would just do a pointer swap and tell the 
> window manager / X-server (or whatever) to recomposite, right?

Yes, I guess the 3D driver would have to notify the X server of the
swap, then the server would swap the pointers and create damage events
for the visible area of the window.


-- 
Earthling Michel DÃnzer      |     Debian (powerpc), X and DRI developer
Libre software enthusiast    |   http://svcs.affero.net/rm.php?r=daenzer



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