[Bug 20053] Team-Fortress 2 and other source games suffer from black menu and missing UI textures in dx9 mode

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=20053





--- Comment #17 from Nephyrin zey <Nephyrin at nephyrin.net>  2010-01-04 12:10:05 ---
(In reply to comment #16)
> 1 . To reply to  byteframe : could you explain to me why a older driver is
> better than a newer ?
> 
> 2. To reply to   Nephyrin zey : I compiled wine 1.1.35 with the hack. then TF2
> seems to run fine (with UI) in dxlevel 90 mode. (around 25-30 fps with screen
> :1920*1200). Could you explain why this hack is not include directly in wine ?

As far as I understand it: Drivers up to 180.60 returned INF on divide by zero
in shaders. Newer ones return NaN, which directx does not expect, causing
issues. This hack changes the particular offending shader path to check for div
by zero and make sure it generates INF. It does not fix the problem in general,
just masks it, hence, a hack.

I'm not sure what the proper way to fix this would be, my guess is it would
require going through and ensuring ambiguous divide by zeros dont occur in all
directx -> glsl situations, but how feasible that is is beyond me. Henri would
probably be the one to decide how to go about properly remedying it, if at all.

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