Re: Gtk::GLArea throws "Couldn't find current GLX or EGL context.\n"' on unrealizing

[Gerlof Fokkema <gerlof fokkema gmail com>]

Dear list,

I've fixed the issue by changing Gtk::GLArea to a managed widget
instead of using it as a class member.
See https://gist.github.com/gfokkema/a0c73de5c9df476b5b31057ebb63394f/revisions
linked earlier.

This somehow fixes the call order of dispose and unrealize.
Thanks @Alexander for setting me on that path.

I can work with this solution, but I do suspect something in gtkmm /
gtkglarea is weird,
since the verbatim gtkglarea demo for gtkmm does not seem to function properly.

Kind regards,
Gerlof Fokkema

On Fri, Dec 6, 2019 at 10:01 PM Gerlof Fokkema <gerlof fokkema gmail com> wrote:
> Hello Daniel,
>
> The call ordering seems to reverse when using gtkmm.
> Thus gtkmm seems to do something that causes that.
>
> Hacked up a quick demo without gtkmm here:
> https://gist.github.com/gfokkema/3aa94c1fc645efad6dba488d3c2fe8f2
>
> With the same breakpoints:
> gtkglarea.c:195: gtk_gl_area_dispose
> gtkglarea.c:575: gtk_gl_area_unrealize
>
> Now gtk_gl_area_unrealize is called first and then
> gtk_gl_area_dispose, which seems more logical indeed.
>
> Regards,
> Gerlof Fokkema
>
> On Fri, Dec 6, 2019 at 9:18 PM Daniel Boles via gtkmm-list
> <gtkmm-list gnome org> wrote:
> > If so, that needs reported on the GTK bug tracker, not the gtkmm mailing list.
> > _______________________________________________
> > gtkmm-list mailing list
> > gtkmm-list gnome org
> > https://mail.gnome.org/mailman/listinfo/gtkmm-list