[Paraview] OpenGL Backend Identification

[Joachim Pouderoux]

BTW, I took a look but I do not see any way for a third party VTK or PV
application that would not use CMake machinery (and use VTK_OPENGL_BACKEND)
to know if the VTK it uses is based on OpenGL backend 1 or 2.
VTK_OPENGL2 is a compiler definition provided to build VTK or PV but, as
there is no global VTK configuration header, shouldn't we add a function in
vtkRenderWindow to return the version of the backend it is based on?

*Joachim Pouderoux*

*PhD, Technical Expert*
*Kitware SAS <http://www.kitware.fr>*


2015-12-08 19:58 GMT+01:00 Ben Boeckel <ben.boeckel at kitware.com>:

> On Mon, Dec 07, 2015 at 14:49:51 -0500, Tim Thirion wrote:
> > I'm looking to provide run-time identification of the current OpenGL
> > backend in use. Some questions:
> >
> > 1. VTK #defines VTK_OPENGL2, but ParaView #defines VTKGL2. Is there a
> > particular reason we have both?
>
> VTK used to have both. VTKGL2 should be migrated to VTK_OPENGL2 (as VTK
> did).
>
> > 2. Is there an ideal place to define such a constant? Perhaps on the
> render
> > window?
>
> The About dialog has a list of information already (versions of Python,
> matplotlib, numpy, Qt, etc.).
>
> --Ben
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