[Bug 27733] Fishdom 2: some fish render purple

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=27733

--- Comment #6 from Matteo Bruni <matteo.mystral at gmail.com> 2013-04-25 10:50:55 CDT ---
This is not fixed for me on Mesa radeon. Not sure why it works fine on Nvidia
(I can confirm that it does).

In general I wouldn't expect any change from
10d46bc042696bb9e5c45ac88af332c957bbff03 related to this bug. If the debugging
I did at the time was correct, the issue is caused by a different handling of
fog coordinates between D3D and OpenGL with fixed function rendering.
Essentially if there is an orthogonal projection matrix set, the fog is
computed with the pre-projection z value on GL, while in D3D it is computed
from the projected z. Properly fixing that requires a vertex pipeline
replacement, which isn't there yet.

So, no idea why that commit actually made a difference here. Sure enough, the
test I added in afd1fe43890026540703c9bc146fba49da316325 still fails, on nvidia
as on radeon. I guess I can take another look, but in any case I wouldn't call
this bug fixed just yet.

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