[virglrenderer-devel] [PATCH] Revert "renderer: swizzle sampler border color channel if we emulate alpha format"

[Gert Wollny]

Am Freitag, den 03.08.2018, 19:35 +0200 schrieb Erik Faye-Lund:
> On 03. aug. 2018 18:10, Elie Tournier wrote:
> > This reverts commit 6a4ef6d8a284d163236d99f30bc5e1480d009544.
> > 
> > Fix a bunch of dEQP-GLES31.functional.texture.border_clamp.*
> > failures when
> > running on GLES
> > 
> > 
> 
> This seems wrong. If swizzle the texture, we need to swizzle the 
> border-color as well...

Border color swizzling seems kind of like a mystic thing, I tried for
two hours to get all related piglits to pass on r600, and there was no
definite answer. It also seems that the spec is not very clear about
this. 

To me it would make sense if the driver would apply the same swizzling
to the border colour like it does to the texels, which would mean that
no manual swizzling should be applied. However, I know that e.g. r600
doesn't do this, although that seems to be more of a question of
everybody who tried has given up (me included). 

best, 
Gert