Re: [GtkGLExt] Multiple OpenGL widgets with a single context (Staffan Gimaker)

[Jose Commins <axora axora net>]

    A context will share buffer objects, shaders, display lists et al - 
in fact I am using PBO's in one of my GL apps with a shared context 
without a problem.

    The only tricky issue is making sure to use a locking mechanism 
with any threads that will use the GL context - you should assume that 
most GL drivers aren't thread-aware, so before any GL calls, lock the 
specific thread before using the shared context.

Regards,
        Jose.

On 10/11/2010 22:35, Staffan Gimåker wrote:
> Thanks for the reply.
>
> However, I'm using a lot of vertex buffer objects that also needs to be shared between the different widgets, and I'm not quite sure they are shared through the use of a share list? According to the GLX specification display lists and texture objects are shared, but there's no mention of VBOs. Are they shared as well?
>
> /Staffan
>
> On Nov 10, 2010, at 8:26 PM, Jose Commins wrote:
>
> > This post should solve your problems:
> >
> > http://mail.gnome.org/archives/gtkglext-list/2005-January/msg00012.html
> >
> > Regards,
> >         Jose.
> >
> > On 10/11/2010 12:00, Staffan Gimaker wrote:
> > > Hi,
> > >
> > > What's the recommended way to create a *single* OpenGL context that can
> > > be used for multiple widgets (in the same window)?
> > >
> > > My current approach creates a context for the main window, containing
> > > all the GL-capable widgets, and uses that context for all the widgets.
> > > It works for my Linux box but messes up redrawing in XQuartz, and there
> > > are mysterious crashes on other machines that I suspect are related to
> > > this.
> > >
> > > /Staffan
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