How to add decorations to an XDG toplevel surface

Development
1

I am trying to create a window directly using wayland-client.h. I found out that on GNOME there are no server side decorations. So, how are decorations added to GNOME applications?

2

The expected way are client side decorations. Basically, your application draws the decorations themselves onto the surface.

You could also use libdecor: