[vtkusers] Error during cleanup: wglMakeCurrent failed in Clean()

[Francois Bertel]

Hello,

Swap your two parts: delete the renderer first and then the renderwindow.


The reason is that RemoveAllViewProps() (implemented in
vtkViewport.cxx, superclass of vtkRenderer) calls
ReleaseGraphicsResources() on each prop which requires (indirectly) a
valid window. For example, a prop like vtkActor will call
ReleaseGraphicsResources() on its texture to release the OpenGL
texture object id.


On Wed, Nov 25, 2009 at 11:19 AM, Zamir Khan <zkhan at modusmed.com> wrote:
> I am seeing the following errors from a VTK 5 / MFC application when I close
> it:
>
> ERROR: In ..\..\Rendering\vtkWin32OpenGLRenderWindow.cxx, line 113
> vtkWin32OpenGLRenderWindow (0685AF70): wglMakeCurrent failed in Clean(),
> error: 6
>
> ERROR: In ..\..\Rendering\vtkWin32OpenGLRenderWindow.cxx, line 113
> vtkWin32OpenGLRenderWindow (0698BAE8): wglMakeCurrent failed in Clean(),
> error: 6
>
> The error will appear 2 or 3 times in the debug output file, depending on
> what actions I have taken in the program (I assume for the instances of
> vtkRenderWindow that are problematic). Also, I can only reproduce it on
> certain platforms (doesn't happen on machine with NVIDIA, but does on
> machine with Intel integrated graphics). I have searched the mailing list
> and the recommendation appears to be to make sure to Finalize() the
> vtkRenderWindow (there are 3 of them being instantiated in this
> application). In the destructor of each of the classes that instantiate
> vtkRenderWindows, I have the following code snippets:
>
>   if (renWin)
>   {
>       renWin->Finalize();
>       renWin->Delete();
>   }
>   if (renderer)
>   {
>       renderer->RemoveAllViewProps();
>       renderer->Delete();
>   }
>
> However, this does not resolve the issue. Any help is appreciated!
>
> Thanks,
> Zamir
>
> --
> Zamir Khan
> Modus Medical Devices
> e-mail: zkhan at modusmed.com
>
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-- 
François Bertel, PhD  | Kitware Inc. Suite 204
1 (518) 371 3971 x113 | 28 Corporate Drive
                      | Clifton Park NY 12065, USA