[Mesa-dev] [PATCH 0/8] Add DCC support.

[Axel Davy]

On 04/09/2015 23:49, Bas Nieuwenhuizen wrote :
>
> With DRI2, my system always gives me SCANOUT framebuffers, even when the
> application is not running fullescreen, which means that decompression will
> not happen in this common case. Although I realize now that I am not sure that
> flag is always set when a compositor is used, as I am not too familiar with
> that area.
>
> - Bas
>
>
That will be the same as well with Wayland and DRI3.
Anything shared with the compositor should have this flag.

Also even if the application may not be fullscreen, display planes could 
be used in theory.