[Bug 42347] New: The Witcher 3 starting menu is distorted [radeonsi]

https://bugs.winehq.org/show_bug.cgi?id=42347

Bug ID: 42347
           Summary: The Witcher 3 starting menu is distorted [radeonsi]
           Product: Wine
           Version: 2.0-rc6
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: directx-d3d
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 57113
  --> https://bugs.winehq.org/attachment.cgi?id=57113
Witcher 3 main menu distortion (no CSMT)

I'm testing The Witcher 3  (GOG/1.31) with recent Wine staging 2.0 (CSMT
disabled), using AMD RX 480 and latest Mesa devel:

OpenGL renderer string: Gallium 0.4 on AMD POLARIS10 (DRM 3.8.0 /
4.9.0-1-amd64, LLVM 3.9.1)
OpenGL core profile version string: 4.5 (Core Profile) Mesa 17.1.0-devel
(git-2ab2be092d)
OpenGL core profile shading language version string: 4.50

Users of Nvidia blob report that they don't have this issue in the starting
menu which appears correct to them, so menu distortion looks radenosi specific.

I opened a Mesa bug here: https://bugs.freedesktop.org/show_bug.cgi?id=99444
However, Mesa developers closed it, noting, that it must be caused by Wine
using NV_register_combiners without checking if it's supported by the driver.
See details in the linked bug.

An relevant portion of the API trace log (filtered):

120612: message: major api error 2: GL_INVALID_ENUM in
glActiveTexture(texture=GL_COMBINER0_NV)
120612 @1 glActiveTexture(texture = GL_COMBINER0_NV)
120619: message: major api error 2: GL_INVALID_ENUM in
glActiveTexture(texture=GL_COMBINER1_NV)
120619 @1 glActiveTexture(texture = GL_COMBINER1_NV)
120626: message: major api error 2: GL_INVALID_ENUM in
glActiveTexture(texture=GL_COMBINER2_NV)
120626 @1 glActiveTexture(texture = GL_COMBINER2_NV)
...