[vtk-developers] vtkgl::LoadExtension not exported

[Burlen Loring]

Hi Kathleen,

Have you tried to use the vtkOpenGLExtensionManager? It has these 
functions. If you initialized it with an vtkOSOpenGLRenderWindow it 
should be able to load the extensions. You probably have a good reason 
not to, but I'm curious to know why that doesn't work.

Burlen

On 4/17/2013 2:01 PM, Kathleen S. Biagas wrote:
> In our attempts to support OSMesa at runtime, we've run into a snag in
> that vtkgl::LoadExtension and vtkgl::GLVersionExtensionsString are not
> exported, and thus not accessible in our implementation.
>
> Are there any objections or unforseen-on-my-part consequences to
> modifying ParseOGLExt.cxx to export those symbols?
>
> Something along the lines of:
>
> Left file: /VTK-Unmodified/Utilities/ParseOGLExt/ParseOGLExt.cxx
> Right file: /VTK-Modified/Utilities/ParseOGLExt/ParseOGLExt.cxx
> 693c693
> <   hfile << endl << "  int LoadExtension(const char *name, "
> ---
>>    hfile << endl << "  extern int VTKRENDERINGOPENGL_EXPORT
> LoadExtension(const char *name, "
> 696c696
> <   hfile << endl << "  const char *GLVersionExtensionsString();" <<
> endl;
> ---
>>    hfile << endl << "  extern VTKRENDERINGOPENGL_EXPORT const char
> *GLVersionExtensionsString();" << endl;
>
>
> Kathleen
>
>
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