[GSoC] Some questions about wayland clients with no outputs present

[Bryce Harrington]

On Mon, May 02, 2016 at 04:42:52PM +0300, Pekka Paalanen wrote:
> On Mon, 2 May 2016 12:49:04 +0200
> Armin Krezović <krezovic.armin at gmail.com> wrote:
> > > So, the backends should indicate to the compositor (and thence to the
> > > enabled shell) that the output change has occurred, and then the shell
> > > has the responsibility to rearrange the client surfaces as it wishes.
> > > Perhaps you'd like to focus your scope on the backend side of things,
> > > make sure the communication path *to* the shell is all working, but
> > > leave the layout logic as outside scope to be done as followup work.
> > >   
> > 
> > I think that desktop-shell already supports rendering on multiple outputs
> > (as confirmed by plugging in a second monitor) and stopping any rendering
> > from a certain output when it gets removed. It still needs to properly handle
> > screen blanking and screensaver when all outputs are gone. The things will
> > change when I start working on second part of my GSoC, which involves
> > extended screens.
> 
> Seems like you are talking about weston-desktop-shell the client.
> Indeed, fairly easy to confirm with e.g. the x11-backend by letting
> Weston create more than one X11 window.
> 
> I forget if it was the Weston core or desktop shell plugin that
> triggers blanking and powersave, and screensaver was removed some time
> ago.

Blanking and powersave is all in Weston core.  The fade in/out animation
stuff is in the desktop shell.

Bryce