Call for Discussion : New Project to support the Wayland display server on Linux

Johan Vos johan at
Wed Jul 7 16:19:23 UTC 2021

Thanks for starting this discussion, and for the great description of the
landscape and evolutions.
I've been looking at Wayland in the past, and as far as JavaFX concerns, I
believe there are only a small amount of changes needed in glass
(leveraging the fact that GDK can use Wayland as a backend), and then a
wayland version of the prism-es2 pipeline which should be relative small as

- Johan

Op wo 7 jul. 2021 om 15:28 schreef Philip Race <philip.race at>:

> For a number of years the Linux community has been working on a complete
> replacement for the 1980's era X11 desktop display server protocol
> with new protocols and libraries that support client-side rendering and
> a compositing desktop windowing system.
> This work is being done under the auspices of the Wayland project [1]
> and there is a reference
> implementation of a Wayland compositor called "Weston".
> A new client written for  the Wayland desktop has no dependency at all
> on X11, but Wayland also provides a compatibility
> mode where the X11 server runs along side Wayland, so that
> thousands of X11 applications can continue to run.
> Presently all distros that ship the Wayland server, also still ship the
> pure X11 server and the user can select
> which one to use on the login screen. However there will come a time
> when Wayland is the only choice and
> already Wayland is the default on RHEL 8, OL 8, Ubuntu 21.04 and I am
> sure others too.
> At that time Java for Linux will "mostly" run via the X11 compatibility
> layer, but would not pass the JCK,
> since some important APIs,  notably those of the java.awt.Robot class
> [2] will fail with Wayland.
> We need to solve this so that pure Java and applications which mix Java
> and X11 APis can work.
> But even then this would mean Java on Linux is not a first class desktop
> citizen, which is not desirable for
> the long term, given the importance of Linux to many Java developers as
> well as to active
> individual and corporate contributors to the JDK project.
> Indeed there have already been informal discussions for some time with
> various parties that have expressed
> interest in helping towards the outcome of supporting Wayland
> Consequently we expect quite shortly to propose an OpenJDK project that
> will consider the goals of
> - a short to medium term solution for JDK running on Wayland in X11
> compatibility mode
> - a medium to long term solution for JDK running as a native Wayland
> client.
> There are some unknowns and questions, such as what are the options for
> supporting Robot ?
> What other support is missing ? What platform APIs should the
> implementation  use ?
> How does a native Wayland solution interoperate with OpenJFX ?
> Comments, expressions of interest etc are welcome.
> -Phil Race, for the Java client groups.
> [1] :
> [2] :

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