[vtk-developers] QVTKRenderWindowInteractor OpenGL bug fix

[Félix C. Morency]

Clinton,

Thank you for pointing that out on gerrit. You are right about the
multiple context issue. I made some more tests and had the following
results:

1) The original wrapper (QWidget) with Matthieu's fix [1] works fine
under Windows x86_64. No need to switch to a QGLWidget.
2) The crash with the original code (QWidget) happens on Linux x86_64
(Ubuntu 11.10), nVidia drivers 295.20. The backtrace points to
vtkXOpenGLRenderWindow.cxx:624
3) Changing the display/window id (SetDisplayId()/SetWindowId())
results in a (different) crash. The backtrace points to
vtkXOpenGLRenderWindow.cxx:585. The dpy->ext_data and w parameters of
the XChangeWindowAttributes method are set to the values returned by
the QWidget x11Info().display() and winId().

I'm stuck. Do you have any pointers/clues on:

1) The reason of the crash with the original code?
2) How to get the OpenGL context from VTK so I can assign it to the
QGLWidget, if possible?

Feel free to ask for more information.

[1]: http://review.source.kitware.com/#/t/831/

Regards,
-F

On Tue, Jun 19, 2012 at 10:54 AM, Félix C. Morency
<felix.morency at gmail.com> wrote:
> Hi,
>
> I pushed in [1] a bug fix that resolves a crash when trying to embed a
> QVTKRenderWindowInteractor in a PySide (v1.1.1) Linux application. The
> commit is marked as a WIP because I have the following error when the
> cone testing application exits:
>
> X Error of failed request:  GLXBadDrawable
>  Major opcode of failed request:  135 (GLX)
>  Minor opcode of failed request:  5 (X_GLXMakeCurrent)
>
> I don't know if its VTK or PySide (or both) related. Do you guys have any idea?
>
> [1]: http://review.source.kitware.com/6249
>
> --
> Félix C. Morency, M.Sc.
> Plateforme d’analyse et de visualisation d’images
> Centre Hospitalier Universitaire de Sherbrooke
> Centre de recherche clinique Étienne-Le Bel
> Local Z5-3031 | 819.346.1110 ext 16634



-- 
--
Félix C. Morency, M.Sc.
Plateforme d’analyse et de visualisation d’images
Centre Hospitalier Universitaire de Sherbrooke
Centre de recherche clinique Étienne-Le Bel
Local Z5-3031 | 819.346.1110 ext 16634