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

[Ken Martin]

Ahh I just saw your screenshots indicating Intel 2500. Maybe the master
changes will work on that. I believe we have been having some hiccups with
the older intel GPUs. I'd like to get them iron out.

Ken

On Mon, Feb 22, 2016 at 9:59 PM, Ken Martin <ken.martin at kitware.com> wrote:

> If your card supports OpenGL 4 then I would think it would also provide a
> 3.2 context. I'm not aware of cards that support 4.0 but would not return a
> 3.2 context when requested. If you check out and build VTK master you could
> try running
>
> ctest -R VBOPLY -VV
>
> and
>
> ctest -R Apple -VV
>
> the output of those two tests can be helpful in debugging these issues.
> Also maybe your system has two GPUs? Like intel on chip plus a dedicated
> GPU and somehow you are not getting the dedicated GPU maybe?  Just some
> ideas.
>
>
>
>
> On Mon, Feb 22, 2016 at 3:03 PM, David Gobbi <david.gobbi at gmail.com>
> wrote:
>
>> 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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>
>
> --
> Ken Martin PhD
> Chairman & CFO
> Kitware Inc.
> 28 Corporate Drive
> Clifton Park NY 12065
> 518 371 3971
>
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-- 
Ken Martin PhD
Chairman & CFO
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065
518 371 3971

This communication, including all attachments, contains confidential and
legally privileged information, and it is intended only for the use of the
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