[GtkGLExt] gtkglext or goocanvas?

[z pekar gmail com]

Hi, I need to upload an image to my app and place clickable ellipses
on it (and connect a signal handler to them) - I was told I should use
goocanvas to do it. I already use gtkglext in my program, so the
question is whether gtkglext can do the job or I anyway have to take
goocanvas? (I just don't want to have a new unnecessary dependence).

thank you in advance
Zeev Pekar