Collaboration on standard Wayland protocol extensions

Martin Graesslin mgraesslin at
Tue Mar 29 08:15:56 UTC 2016

On Tuesday, March 29, 2016 9:23:13 AM CEST Peter Hutterer wrote:
> On Sun, Mar 27, 2016 at 04:34:37PM -0400, Drew DeVault wrote:
> > Greetings! I am the maintainer of the Sway Wayland compositor.
> > 
> >
> > 
> > It's almost the Year of Wayland on the Desktop(tm), and I have
> > reached out to each of the projects this message is addressed to (GNOME,
> > Kwin, and wayland-devel) to collaborate on some shared protocol
> > extensions for doing a handful of common tasks such as display
> > configuration and taking screenshots. Life will be much easier for
> > projects like ffmpeg and imagemagick if they don't have to implement
> > compositor-specific code for capturing the screen!
> > 
> > I want to start by establishing the requirements for these protocols.
> > Broadly speaking, I am looking to create protocols for the following
> > use-cases:
> > 
> > - Screen capture
> > - Output configuration
> > - More detailed surface roles (should it be floating, is it a modal,
> > 
> >   does it want to draw its own decorations, etc)
> > 
> > - Input device configuration
> a comment on the last point: input device configuration is either extremely
> simple ("I want tapping enabled") or complex ("This device needs feature A
> when condition B is met"). There is very little middle ground.
> as a result, you either have some generic protocol that won't meet the niche
> cases or you have a complex protocol that covers all the niche cases but
> ends up being just a shim between the underlying implementation and the
> compositor. Such a layer provides very little benefit but restricts what
> the compositor can add in the future. It's not a good idea, imo.

I agree. I think that's something best left to the respective compositor 
specific configuration modules.

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