https://gitlab.freedesktop.org/mesa/mesa/merge_requests/237
New version of the thread that I sent recently, showing two initial
versions to solve the regression I found on MR #144:
https://lists.freedesktop.org/archives/mesa-dev/2019-February/214808.html
This MR includes a v2 of the second option. It includes Jason's feedback
plus some extra cleaning-ups that I found while re-checking the GLSL
linker (like removing PixelCenterInteger/OriginUpperLeft from
gl_program, as that info is tracked at gl_program.info.fs.xxx). Due
that, it touches a lot of places on Mesa.
This MR also includes a second patch, that removes
pixel_center_integer/origin_upper_left from the ir variable. Basically
because that is already tracked in a lot of places, so it is not really
needed. It is on a different patch because I initially though of it as
something optional, as it is not really required to fix the regression.
But after finishing it, the only reason to keep it as a different patch
is to make easier the review. I think that it would be better to squash
both patches, although I don't have a strong opinion, I would let the
reviewer give his opinion.
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