Re: [VirtualGL-Devel] Detecting when running under VirtualGL

[DRC <dco...@us...>]

On 12/22/11 9:56 AM, Nathan Kidd wrote:
> On 11-12-22 09:36 AM, Stefan Eilemann wrote:
>> I need to detect within a C++ program whether or not I'm running under VirtualGL, to enable certain optimizations. What is the recommended way to do this?
> 
> When VGL is running it overrides the GLX vendor strings with 
> "VirtualGL".  Try glXGetClientString() with GLX_VENDOR. 
> http://www.opengl.org/sdk/docs/man/xhtml/glXGetClientString.xml

Forget what I said about VGL_AUTOTEST.  This is a much better approach,
in general, although I think that, in the OP's case, he wanted to know
about VGL's presence before the display connection was created.