[vtkusers] Crash in vtkShaderProgram/vtkOpenGLPolyDataMapper

[Ken Martin]

The render() method has a

if (initialized)

to protect it from making opengl calls prior to initialization but it is
certainly possible that some other operation is hitting openGL. If you know
where it crashes that could help narrow down the entry point that is
getting hit prior to initialization.



On Wed, Apr 27, 2016 at 11:26 AM, Sebastien Jourdain <
sebastien.jourdain at kitware.com> wrote:

> There is only one change on the OpenGL backend but it is a huge one. So
> definitely it is more than likely the case...
>
> Ken any thoughts on that initialization process/check?
>
> Otherwise, you can always build your VTK with the OpenGL1 backend and see
> if your problem goes away. That could also help us narrow down the source
> of the problem.
>
> Thanks,
>
> Seb
>
> On Wed, Apr 27, 2016 at 9:15 AM, dei <david.ei at novodynamics.com> wrote:
>
>> This feels like a race condition between the vtk initialization of OpenGL
>> and
>> the first vtkRender() call. Is there a way to test for OpenGL
>> initialized? I
>> could block vtkRender() calls till it's ready to go. vtk's usage of OpenGL
>> changed a lot in the last 2 years, right?
>>
>>
>>
>> --
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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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