[Bug 41711] World of Warcraft - Legion renders into "sub-windows" incorrectly with DirectX/Mesa

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=41711

Matteo Bruni <matteo.mystral at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #27 from Matteo Bruni <matteo.mystral at gmail.com> ---
(In reply to Chris Rankin from comment #25)
> (In reply to Matteo Bruni from comment #24)
> > So if I understand it correctly, WoW works fine for you with d3d9 and no
> > overrides? If that's the case there is nothing to fix here.
> 
> Not setting MESA_GL_VERSION_OVERRIDE sounds like just another workaround to
> me :-|. Because as I've already said, it also works with
> MESA_GL_VERSION_OVERRIDE=4.0COMPAT.

How is not setting any override a workaround?
Wine, like any reasonable OpenGL application, checks what features are
available with the current driver / GPU and uses only those that are supported.
If you override the GL version reported by the Mesa driver you effectively
break that kind of checking, since the driver now reports a bunch more features
as supported which they really aren't (that environment variable doesn't
magically add features to the driver). Wine goes to use them, they don't work
and you get GL errors and broken rendering.

By overriding the GL version to 4.1 compatibility you enable a number of
extensions flags in Wine without the driver being able to support them,
breaking things. FWIW it's probably ARB_viewport_array the relevant extension.

-- 
Do not reply to this email, post in Bugzilla using the
above URL to reply.
You are receiving this mail because:
You are watching all bug changes.