[Bug 92743] Centroid shouldn't have to match between the FS and the VS

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92743

--- Comment #2 from Marta Löfstedt <marta.lofstedt at intel.com> ---
So, I removed the check for centroid matching, but the test still does not
pass. The new reason is that we now have smooth as output in vertex, but no
interpolation qualifier in frag.
So, is the relaxed requirement for centroid also to be applied to all
interpolation qualifiers?

For example: GLSL ES 3.0 standard, in section 4.3.9 say:
"The type and presence of the interpolation qualifiers and storage qualifiers
and invariant qualifiers of
variables with the same name declared in all linked shaders must match,
otherwise the link command will
fail."

Also, in GLSL ES 3.10 we have a nice table in 9.2.1 where we see that centroid
does not have to match, but smooth does.

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