GtkGlArea port to GTK+3 : RFYC

[Tarnyko <tarnyko tarnyko net>]

Hi folks, 

I recently needed a cross-platform way to display an OpenGL context in a 
GTK+3 Window ; I checked Gnome-Chess to get example, but it uses GLX 
directly (doesn't work or native Mac OSX nor Win32). 

There used to be a GtkGLArea library for GTK+2, wasn't ported though. So I 
have put up a set of (still ugly, but improving) patches to GtkGLArea for 
GTK+ 3 : 

http://www.tarnyko.net/repo/gtkglarea3.patch 

Screenshot on Win32: 

http://www.tarnyko.net/repo/gtkglarea3.png 

So it kinda works. I'd like to submit it on Bugzilla, but before I try : is 
gtkglarea the way to go ? OK to upgrade lib version from 2.X.X to 3.X.X ? 
Better work with Clutter-COGL-GTK3 ? 

Any feedback appreciated. 

Regards,
Tarnyko