Posted by eb on Dec 09, 2013; 7:34pm
URL: https://forum.jogamp.org/Use-of-extension-in-JOGL-tp4030840.html

Hi,

I would like to know how can I use an extension using JOGL.
I have found isExtensionAvailable() which returns true for the extension I would like to use.
But getExtension() for the same key returns "null".

My case is that I would like to use a geometry shader written in GLSL_120.
So I need to use glProgramParameteri() to pass the input/output geometry parameters, but this method is part of the GL4 interface.
And I want that to work on a GL 3 context.

So I'm trying to find a way to use glProgramParameteriEXT() instead, but I don't know how to get access to that.