internal screen concept

[Dave Airlie]

> Yuck... yeah tying this into the DDX looks ugly no matter what.  Maybe
> you should just punt and support it under Wayland only. :)
>
> What does this look like from the app side?  How does a given app end
> up running on the offload GPU?  Is there a GLX or EGL extension that
> adds bits to the config for choosing?  Or a separate X display?

Old skool, env var. Since its not something apps are meant to know
about hence no
other way for libGL to pick it up.

Dave.