ref: fd7882fb45829e38d2aa2f44169ae657a229ccec
parent: 07906104a2a67221913aebc5f0a5c1e00f3869d9
author: Simon Tatham <anakin@pobox.com>
date: Sat Oct 3 08:28:02 EDT 2015
GTK 3 prep: make the server-side backing pixmap optional. When GDK_DISABLE_DEPRECATED is defined, we now don't have fe->pixmap; instead we just maintain our client-side window contents in fe->image, and draw from there directly to the window in the expose handler.