[Mesa3d-dev] Bug in vpshader

[Klaus N. <kniederk@MI.Uni-Koeln.DE>]

Hi,

Yesterday I tried the vp_xxx programs in "Mesa/tests/" and I guess you
already know that in the vptorus-program a square is missing. At least
I guess this is what you refer to in the RELNOTES-4.1 file.

But if you take vpwarpmesh (the program with the gravitational point) and
increase the size of the mesh, then there also a bug appears (probably the
same one): Here it is not that some squares vanish, but instead a few
squares touch the gravitational point. I don't know if this bug was
already known or not, but maybe it helps at least for debugging.

I have looked a bit at the source code of the vertex-program and it looks
pretty exciting, especially the idea to build a compiler to
x86/3DNow/SSE-assembler sounds very interesting (I remember a year ago
there was a thread about this on the mailinglist, but I did not follow it:
What was the conclusion?).

Anyway, without wanting to be a pain in the ass and acknowledging that
NVidia paid for the vpshader-code, thus subsidizing the overall
development of Mesa: I think there should be an option to compile the
vp-stuff out. Maybe my English is really poor and maybe there is a
childhood trauma that makes me distrust of large companies: But I don't
understand half of the Nvidia-license conditions (I have read several free
licenses from the beginning to the end and I do understand them, but not
this one) and I'm afraid that for example the Debian project would not
agree on the license being a free license (anyone from Debian on the list
to comment on this?).

E.g. (not that it is very likely to happen to me), but if I make a claim
that some NVidia patent is void, does it follow that I am not allowed to
use Mesa anymore (and after inclusion into XFree) an XServer?

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;-)

Bye,
	Klaus