custom drawing with gktd?

[Johnson Jones via Digitalmars-d-learn]

I have a need to draw custom objects with gtkD, is this possible? 
I see that with drawing area one can use cario, and it seems that 
gtkD supports this. I'd rather use openGL if possible. I see 
there is a gtkDGL but no reference to how to use it.

I need pretty simple drawing stuff... lines, icons, maybe 
images(which, I guess, I'll have to use an external lib to load 
the images).

Thanks.