[Mesa-dev] fixed function vertex program and point sprites

[Keith Whitwell]

This makes sense & looks good to me Dave.

Keith

On Mon, Apr 12, 2010 at 6:46 AM, Dave Airlie <airlied at gmail.com> wrote:
> So I've been trying to make r300g do point sprites for a few days now,
> and I've pulled out quite a lot of hair blaming pieces of hardware
> along with random r300g states.
>
> I finally noticed I was getting vertex emits for texcoords, which I
> really shouldn't have, and the radeon hw once the VP gets asked to
> emit something to the rasteriser, its overwrites the stuffing values,
> so nothing ever gets stuffed which is quite annoying.
>
> So I tracked back why the vertex shader was touching texcoords as
> there was no reason for it to in the point sprite case, and this patch
> is the result.
>
> It seems like the correct thing to do but comment as to what it might
> violate are welcome.
>
> Thanks,
> Dave.
>
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