[Bug 38648] Multiple games and applications need support for Mesa OpenGL >= 3.2 core profiles, Shader Model 4, GLSL 1.50 (Microsoft Office 2013 installer, .NET/XNA games)

https://bugs.winehq.org/show_bug.cgi?id=38648

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--- Comment #21 from [e-mail] ---
(In reply to Henri Verbeet from comment #14)
> (In reply to Matthew Millar from comment #13)
> > As I understand it, this issue is the result of flawed logic in the
> > shader_model selection criteria resulting in shader_model variable in
> > dlls/wined3d/glsl_shader.c being set to 2 or 3, when it should be 4 for Mesa.
>
> No, you're misunderstanding the issue. We can't currently do shader model 4
> on Mesa, so "3" is correct. The subset of shader model 4 that the office
> installer needs happens to work, but geometry shaders for example would fail.

Makes sense. However, if the currently implemented subset is sufficient for at
least /some/ applications (i.e. Office 2013, which is kind of an important
application), would it not make sense to make this a setting somewhere? Not
talking about winecfg, but how about a regkey
HKCU\Software\Wine\Direct3D\ShaderModelVersionOverride?