[vtkusers] OpenGL fails to initialize for Windows 7, VTK 7.0

[David Gobbi]

If you get the master branch, it includes this patch which might be related:
https://gitlab.kitware.com/vtk/vtk/commit/8d0daf13

On Mon, Feb 22, 2016 at 12:33 PM, Matthias Blaicher <matthias at blaicher.com>
wrote:

> Hi David,
>
> I guess you are right, it looks like this is the issue. According to
> OpenGL Extensions Viewer, the card exposes OpenGL 4.
>
> If I understood it correctly, the problem seems to be that gpu_shader4
> is not exposed in the 2.1 context. And 3.2 is tested but fails (have to
> check that for my card).
>
> Is there any patch, which would try a 3.1 context too? I've seen some
> commits in master (e.g. ca65662fa "Merge topic
> 'try_more_recent_opengl_add_getversion'"). I'll give the master branch a
> spin and report back.
>
> Best,
>
> Matthias
>
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