i965 textured video crash

[Luca Dionisi]

On 11/10/06, Matthias Hopf <mhopf at suse.de> wrote:
> On Nov 10, 06 13:34:15 +0100, Luca Dionisi wrote:
> > I noticed a thing that I would say is strange.
> > When I play a movie without Xv from any supporting movie player
> > (e.g. a gstreamer aware app with x11 no Xv, or mplayer -vo x11)
> > the video window does well all 3d effects (rotates with cube, woobles, ...)
> > and the playback is good and the cpu is idle.
>
> Can't be 100% idle, as the CPU has to do decoding and color conversion.

Well, the cpu in use was very low. Say 5% or less.

> > If I use vesa driver, instead, the playback is bad and the cpu gets loaded.
>
> This is mostly due to less efficient memory transfer.
>
> > So I think it is accelerated.
>
> Not really. Only XVideo has support for YUV color space. You can emulate
> that with OpenGL, but not with plain X11.

So, decoding and color conversion is done by CPU. And what about
transformations needed for wobbling and 3d rotation?

--Luca