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

On Jan 8, 2008 3:06 PM, R. Aditya Kadambi <[email protected]> wrote:

>
>
> On Jan 8, 2008 12:33 PM, Roland Scheidegger <[email protected]>
> wrote:
>
> > Roland Scheidegger wrote:
> > > R. Aditya Kadambi wrote:
> > >>     Alternatively, you could try out the attached quick patch against
> > radeon
> > >>     drm, which is completely untested. I guess the problem could be
> > >>     fixed in
> > >>     userspace instead by breaking up a single texture upload into
> > several
> > >>     smaller ones (ugly).
> > >>
> > >>     Roland
> > >>
> > >>
> > >> Hi Roland;
> > >>
> > >> I just applied the patch.
> > >>
> > >> Well, even the smaller volumes (like 64x64x64 that used to work)
> > don't
> > >> work with this patch. Sorry.
> > > Yes, there are obvious bugs in this patch. This one might work better.
> > I
> > > think though it might be very broken (due to texture tiling) if
> > texture
> > > width * texture bpp is not a multiple of 1024.
> > Wait no that's broken too. Try the new version here instead...
> > In fact, texture tiling shouldn't be a problem since the byte offset
> > will always be a multiple of 1024.
> >
> > Roland
>
>
> Hi Roland;
>
> It works!!
>
> I had texture size set to 512 in r200 driver. Do you mean that with this
> patch, it'd work even if I had not set it to 512? if so, what would be the
> new limit?
>
> Thanks for all your help.
>
> I will send another email regarding viable volume rendering using open
> source mesa/dri/r200.
>
> -Aditya
>
> Hi Roland;

I filed a bug report on freedesktop bugzilla. Its 13980. I included your
patch as reference.

-Aditya

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