i965 textured video crash

Matthias Hopf mhopf at suse.de
Mon Nov 6 03:18:32 PST 2006

On Nov 06, 06 09:42:07 +0100, Luca Dionisi wrote:
> On 11/5/06, Andrew Barr <andrew.james.barr at gmail.com> wrote:
> >Are you sure you have DRI enabled? I don't know if textured video will even
> >work without DRI but I suppose you might be using software rendering.
> Yes. DRI is enabled.
> >I have never been able to get Compiz to work on my G965 system. What 
> >xserver
> >and mesa versions are you using? Are you using Xgl or AIGLX?
> I tried 3d effects on fedora. Now I don't know for sure, but I suppose
> it is Xgl.
> I will double check later.

If you're using Xgl, you're not using the native XVideo support of the
driver, but the one using pixel shaders / fragment programs implemented
in Xgl. However, as the intel driver still doesn't support FBOs or
pBuffers (AFAIK the support is still only in the according branch, and I
don't know much about its state), everything will we software for you.

> >Performance can be improved; the pixel shader program that we wrote has
> >some obvious areas for performance improvement. Plus, it would be fun to
> >have it use a longer filter, which should improve appearance compared to
> >the simple bi-linear interpolation it is doing today.

I think Keith is talking about the driver specific XVideo implementation
- you will get that with AIGLX only.

>    * XVideo YV12 surfaces are hardware accelerated (when no composite
> manager is used or for fullscreen unredirected windows), but due to a
> bug in the driver the video will miss one of the color channels,
> leading to false greenish/purple colors. This has to be investigated.

Just updated this - the bug seems to be fixed.


Matthias Hopf <mhopf at suse.de>       __        __   __
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