Re: 3D texture size limitations in mesa/r200?

On Jan 5, 2008 9:28 AM, R. Aditya Kadambi <[email protected]> wrote:

>
>
> On Jan 5, 2008 8:35 AM, Roland Scheidegger <[email protected]>
> wrote:
>
> > R. Aditya Kadambi wrote:
> > > I get these debug messages at start on setting R200_DEBUG=tex. Same
> > > messages for the successful rendering and unsuccessful rendering!
> > >
> > > r200AllocTexObj( 0x802bf2800, 0x802ef0800 )
> > Hmm that's not much debug output. Guess you'd need a version built for
> > debugging...
> >
> > > Thanks. Looks like the patch is for drivers/dri/radeon/*. I thought
> > > the driver was drivers/dri/r200/*. Am I missing something here?
> > No this patch is for the kernel module. It is against the git drm, but
> > it should apply to the kernel drm as well probably (but obviously the
> > file will be in a different location then).
> >
> > > In the meantime, I will put in the debug flags and report back. Also
> > > I will try out the different sizes mentioned.
> > If the problem is what I think it is, going past a certain texture
> > height * depth is what will trigger the problem.
> >
> > Roland
>
>
> Hi;
>
> I did a little bit more experimentation yesterday.
>
> I increase the texture size in the r200 driver from 256 to 512.
>
> (a)I was able to render a 512x512x32 succesfully. Then I tried 256x256x64.
> It rendered successfully.
>
> (b) I restarted X and then rendered 256x256x256. Only "half" volume
> rendered successfully.
>
> I tried (a) again and it was a success. That sequence always works.
>
> (c) I tried 512x512x32. Successful. Then tried 512x512x16. Successful.
> Then tried 256x256x64. Successful.
>
> I will experiment a bit more. It almost looks like graphics memory is not
> "cleaned up". But it is "cleaned up" when I go from 512x512x* to
> lower  volumes.
>
> I will report back on the sequences.
>
> Thanks,
> Aditya
>

Minor correction to the post. Point (b) should be "I restarted X and then
rendered 256x256x64 (or 32). Only "half" volume rendered successfully"

Thanks,
Aditya

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