[ANNOUNCE] xf86-video-ati-6.6.191

Michel Dänzer michel at tungstengraphics.com
Tue Apr 3 23:45:34 PDT 2007

On Wed, 2007-04-04 at 06:56 +1000, Daniel Kasak wrote:
> Xavier Bestel wrote:
> >> Does this one works on r300 with EXA ? Esp. with 3D compositing WM ?
> >>     
> >
> > Answering my own question here, for those interested: it's still
> > extremely slow with EXA + beryl on r300, I had to revert to XAA for now
> >   
> As far as I know, there's no point in using EXA on r300, fullstop. The
> latest xserver release candidates have some server-side EXA stuff that
> make compositing usable ... almost ... but if you're using Beryl, then
> you're getting than via another method, so I don't really see why you
> want EXA anyway.

You're right insofar as with the way GLX_EXT_texture_from_pixmap is
currently implemented with AIGLX, 2D acceleration is getting in the way
more than it helps. Even with XAA, Option "XaaNoOffscreenPixmaps" or the
equivalent is generally needed for good performance, which basically
disables 2D acceleration when a compositing manager runs as pretty much
everything is a pixmap then. The same can be achieved with EXA with
Option "FBTexPercent" "100", but there's little if any difference
between them in that case, both will basically just pass through to the
fb layer...

However, this changes with something like
http://people.freedesktop.org/~daenzer/aiglx-zero-copy-tfp/ , which is
only possible with EXA.

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

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