[Bug 40978] Wrong colors on i915 and similar GPUs in GTA Vice City

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=40978

--- Comment #2 from Henri Verbeet <hverbeet at gmail.com> ---
(In reply to Ruslan Kabatsayev from comment #0)
> I've tracked the problem down to lack of support of GL_EXT_vertex_array_bgra
> on i915. I can reproduce it on my Haswell GPU by using
> MESA_EXTENSION_OVERRIDE=-GL_EXT_vertex_array_bgra. (FWIW, i915 supports
> GL_ARB_vertex_program, which might be used as a substitute. Although it's
> not completely HW accelerated, but should be better than pure SW
> implementation.)
> 
It's certainly possible that the fallback path broke somewhere along the way,
since EXT_vertex_array_bgra is so common these days. That would of course be a
legitimate regression. What's odd about this is that I was under the impression
that i915 supported EXT_vertex_array_bgra, although it's been long enough since
I last touched i915 hardware that I could simply be wrong about that.

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