[GtkGLExt] Sharing display lists among a dynamic set of widgets

["Timothy M. Shead" <tshead k-3d com>]

My application (http://k3d.sourceforge.net) provides users with 
zero-to-many OpenGL views of a 3D scene, with users able to create and 
destroy views at-will.  We also need to share display lists between 
views for efficiency.  The problem is that if the "first" view (the one 
which is passed to subsequent views as the "share_list" argument) is 
destroyed, all the display lists go with it.  I'm wondering if there is 
any way around this, besides creating a hidden widget with a 
GdkGLContext that never gets destroyed?  Could the reference count of 
the "first" GdkGLContext be managed to prevent its destruction?

Thanks in advance,
Tim Shead