Planning the X/Wayland Marriage, X Server 1.13
Keith then took off his release management hat and began talking about X.Org and Wayland integration. The plans, which aren't new, is to allow for full integration between X and Wayland applications. There will be support for seamless multi-window mode, and full performance of X exposed through Wayland. X.Org-dependent applications will be able to run within a Wayland Display Server just as XQuartz does similarly for X applications on Mac OS X.
Keith expects that there will be no performance penalty of running X applications on Wayland versus running them as you have already for decades on bare metal. In fact, he says it's one of his goals to see there aren't any performance drops, but the performance of X applications on Wayland may actually yield a performance boost. The performance boost would come as a result of handling swap requests with Wayland being much simpler.
Among the X/Wayland items still to be solved is how to synchronize keyboard mapping changes, the acceleration architecture for X on Wayland, and how to handle RandR-like display configuration changes. In terms of the acceleration architecture discussion it came down to how to best accelerate X apps on Wayland and whether some DDX driver code from the various hardware drivers should be pulled out or what would be the best approach.
As far as what works now for X on Wayland is that basic X apps should be working, a primitive window manager, cut/paste, and drag-and-drop works. Keith acknowledges lots of people are excited about switching to Wayland.
First Wayland Release: Wayland 0.85 With Weston
Kristian Høgsberg has just announced Wayland 0.85 and Weston 0.85, which mark the first official releases of Wayland and its reference compositor, respectively.
While Wayland/Weston 0.85 is now out there, this is just one of their pre-1.0 snapshots. This is just a first-shot for those that have been waiting for Wayland to appear in some released form before either packaging it up and/or beginning work on porting their application/desktop to the eventual X.Org-replacement.
From Kristian's announcement:
This is the first real release of Wayland and Weston. Wayland is the protocol and IPC mechanism while Weston is the reference compositor implementation. The 0.85 branch in both repositories is going to be protocol and interface stable. We have a series of protocol changes on the table before 1.0 but this branch marks a stable point before we jump into that.
We may do more 0.85 releases down the road if there's interest and something sufficiently embarrassing shows up.