[Bug 91114] ES3-CTS.gtf.GL3Tests.shadow.shadow_execution_vert fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91114

--- Comment #9 from Iago Toral <itoral at igalia.com> ---
(In reply to Tapani Pälli from comment #8)
> (In reply to Iago Toral from comment #7)
> > do you know if the bad commit breaks other CTS tests with textureGrad on
> > cubes? I am wondering if the problem here might be that piglit and deqp both
> > have a different expectation than the CTS.
> 
> Nope just did a full run and the only failing tests are:
> 
> ES3-CTS.gtf.GL3Tests.shadow.shadow_execution_vert
> ES3-CTS.gtf.GL3Tests.shadow.shadow_execution_frag

Ok, in that case it looks as if the CTS expectations for textureGrad on shadow
cube samplers specifically are different from those in piglit/deqp.

I have just run bin/tex-miplevel-selection textureGrad CubeShadow with the
proprietary nVidia driver  and it passes, so I guess that points to piglit's
expectations being correct here. Could it be that the CTS test is not correct?
I find it difficult to believe that piglit/deqp and the nVidia implementation
are all incorrect.

That said, I wonder if there is something special about this CTS test that
makes it different from the piglit tests so as to need a different LOD
computation.

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