RandR 1.4 restart

Soeren Sandmann sandmann at cs.au.dk
Tue Mar 1 14:48:44 PST 2011

Keith Packard <keithp at keithp.com> writes:

> On Tue, 01 Mar 2011 20:12:14 +0100, Soeren Sandmann <sandmann at cs.au.dk> wrote:
>> Presumably the main use case for this is fullscreen video.
> When using a compositing manager, any full-screen window for video or
> graphics would be 'un-redirected', eliminating any cost of using a
> compositing manager. And, of course, with DRI2, applications would be
> using swapping instead of copying for window update.

I think you can do better than that by scanning out from a YUV
pixmap. This avoids the RGB conversion on hardware that has the
capability, and it does so without the application doing anything

In any case, if you read the rest of the email, the setup described
there avoids a whole bunch of copying in all cases, not just he
fullscreen case.


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