[vtkusers] opengl support

[Clinton Stimpson]

Bruno Arbter wrote:
> Hi everybody,
>
> I'm using qt with vtk (QVTKWidget). Testing the QVTKWidget on OpenGL support
> with QVTKWidget::SupportsOpenGL(), I wondered that the result was 0 (false)
> even if the result looks fine. Same happens when testing the Medical1
> example (without qt support). I already checked the OpenGL requirements from
> FAQ, they are fullfilled.
>
> Any idea? Is OpenGL used anyway?
>   
What platform?
If its Mac, I looks like vtkCarbonRenderWindow doesn't implement 
SupportsOpenGL().
So it'll return 0 even though OpenGL is used.

Clint