[Mesa-dev] [PATCH] mesa: expose ARB_compute_shader with compat profile

[Nanley Chery]

On Tue, Jun 07, 2016 at 04:28:48PM -0700, Nanley Chery wrote:
> On Wed, May 25, 2016 at 12:52:38PM -0700, Matt Turner wrote:
> > On Wed, May 25, 2016 at 12:17 PM, Samuel Pitoiset
> > <samuel.pitoiset at gmail.com> wrote:
> > > This fixes use of compute shaders with some NVIDIA GL 4.3 samples which
> > > require a compat profile.
> > 
> > I'm confused.
> > 
> > The samples you're talking about... use 4.3 compatibility? We already
> > don't support compatibility profile, so you presumably have to hack
> > that on.
> > 
> > The ARB_compute_shader extension spec says it requires 4.2, and we
> > don't expose 4.2 with the compatibility profile. I think you should
> > have some justification for why it's safe to expose in compatibility
> > profile, since that's a pretty big change. Or, you don't want to
> > expose it in compatibility but you need this patch to enable it with
> > the 4.2-compat hack enabled...?
> > 
> > Strangely, ARB_compute_shader says "GLL, GLC" in extensions_table.h,
> > but it's only core-enabled on my glxinfo.
> 
> Because extensions_table.h has "GLL" in the ARB_compute_shader entry,
> the extension is already exposed in all compatibility contexts. This
                                                                ^
All such contexts which have the driver/HW support for the extension
that is.

- Nanley

> patch fixes the bug of advertising the extension externally, but
> internally failing to do the logic required by the extension.
> 
> - Nanley
> 
> > _______________________________________________
> > mesa-dev mailing list
> > mesa-dev at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/mesa-dev