[Bug 23684] Mass Effect 2 demo: decals on walls and floor flicker

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=23684





--- Comment #3 from Stefan Dösinger <stefandoesinger at gmx.at>  2010-07-29 11:06:40 ---
Created an attachment (id=29908)
 --> (http://bugs.winehq.org/attachment.cgi?id=29908)
Adjust the polygon offset factor

Can you try this patch? It adjusts the polygon offset bias factor. This works
around the flicker for me. The patch isn't a proper fix as it is, at very least
it needs an explanation why the new value is more correct than the old one. If
the patch doesn't help, try to variate the value a bit.

The polygon offset has GPU specific effects in OpenGL, which makes converting
d3d to GL values tricky. We may have to write a test routine that finds out the
correct factor on the current GPU during wined3d load time.

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