examples: Support windows in OpenGL examples
WGL does not have the concept of a Display
connection, presumably
because there's always only one compositor active. All interop
and sharing is happening from the Context
afterwards.
After all glutin
doesn't have a pointer inside RawDisplay::Wgl
,
and upstream gstreamer
code creates a dummy display on Win32.
WINRT is not taken into account & tested yet.
Edited by Marijn Suijten