[Mesa-dev] Implement NV_fog_distance for Gallium hardware

[Jose Fonseca]

I only see implementation for ffvertex_prog.c

Wasn't (or will soon be) the FF->Mesa IR replaced with FF->GLSL IR?  If so, can you truly enable unconditionally on gallium/st?

Jose

----- Original Message -----
> If there are no other concerns, I'll push this on Saturday, including
> the nv20 fix from Francisco Jerez.
> 
> http://cgit.freedesktop.org/~mareko/mesa/log/?h=nv-fog-distance
> 
> Marek
> 
> On Tue, Sep 20, 2011 at 7:50 AM, Nicholas Miell <nmiell at gmail.com>
> wrote:
> > On 09/19/2011 10:23 AM, Ian Romanick wrote:
> >>
> >> I guess the big question is... why?  With vertex shaders, this
> >> functionality is not terribly useful.  Over the past few weeks
> >> we've
> >> been *removing* code like this, so it seems kind of odd to add
> >> some of
> >> it.  If I'm not mistaken, the only hardware in Mesa that can do
> >> this
> >> but not vertex shaders is NV10.  Is it really that helpful?
> >>
> >> I'm not necessarily opposed to adding this, I just want to be sure
> >> we're giving it full thought... that's all.
> >>
> >
> > Good question. In the general case, I'd agree with you that
> > implementing
> > ancient extensions is a waste of effort, but this one is (AFAICT)
> > an
> > extremely low impact change that benefits a number of existing
> > projects.
> > It even has new code being written to target it, oddly enough
> > (which is
> > what prompted my interest in the first place).
> >
> > My first pass at this actually skipped the extension entirely and
> > just
> > changed the generated vertex program to always use the eye radial
> > distance, but I figured that a full implementation of the extension
> > would be the correct thing to do, especially when there may be some
> > program out in the wild that breaks if the fog distance isn't
> > abs(Ze).
> > _______________________________________________
> > mesa-dev mailing list
> > mesa-dev at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/mesa-dev
> >
> _______________________________________________
> mesa-dev mailing list
> mesa-dev at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/mesa-dev
>