42855b69e7
The connection to the Xserver for the X11 window manager part of mutter even on Wayland may prevent the Xserver from shutting down. Currently, what mutter does is to check the X11 clients still connected to Xwayland using the XRes extension, with a list of X11 clients that can be safely ignored (typically the GNOME XSettings daemon, the IBus daemon, pulseaudio and even mutter window manager itself). When there is just those known clients remaining, mutter would kill Xwayland automatically. But that's racy, because between the time mutter checks with Xwayland the remaining clients and the time it actually kills the process, a new X11 client might have come along and won't be able to connect to Xwayland that mutter is just about to kill. Because of that, the feature “autoclose-xwayland” is marked as an experimental feature in mutter and not enabled by default. Thankfully, the Xserver has all it takes to manage that already, and is even capable of terminating itself once all X11 clients are gone (the -terminate option on the command line). With XFixes version 6, the X11 clients can declare themselves "terminatable", so that the Xserver could simply ignore those X11 clients when checking the remaining clients and terminate itself automatically. Use that mechanism to declare mutter's own connection to the Xserver as "terminatable" when Xwayland is started on demand so that it won't hold Xwayland alive for the sole purpose of mutter itself. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1794> |
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| .gitlab/issue_templates | ||
| .gitlab-ci | ||
| clutter | ||
| cogl | ||
| data | ||
| doc | ||
| meson | ||
| po | ||
| src | ||
| subprojects | ||
| tools | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| check-style.py | ||
| config.h.meson | ||
| COPYING | ||
| HACKING.md | ||
| meson.build | ||
| meson_options.txt | ||
| mutter.doap | ||
| NEWS | ||
| README.md | ||
Mutter
Mutter is a Wayland display server and X11 window manager and compositor library.
When used as a Wayland display server, it runs on top of KMS and libinput. It implements the compositor side of the Wayland core protocol as well as various protocol extensions. It also has functionality related to running X11 applications using Xwayland.
When used on top of Xorg it acts as a X11 window manager and compositing manager.
It contains functionality related to, among other things, window management, window compositing, focus tracking, workspace management, keybindings and monitor configuration.
Internally it uses a fork of Cogl, a hardware acceleration abstraction library used to simplify usage of OpenGL pipelines, as well as a fork af Clutter, a scene graph and user interface toolkit.
Mutter is used by, for example, GNOME Shell, the GNOME core user interface, and by Gala, elementary OS's window manager. It can also be run standalone, using the command "mutter", but just running plain mutter is only intended for debugging purposes.
Contributing
To contribute, open merge requests at https://gitlab.gnome.org/GNOME/mutter.
It can be useful to look at the documentation available at the Wiki.
Coding style and conventions
See HACKING.md.
Git messages
Commit messages should follow the GNOME commit message
guidelines. We require an URL
to either an issue or a merge request in each commit. Try to always prefix
commit subjects with a relevant topic, such as compositor: or
clutter/actor:, and it's always better to write too much in the commit
message body than too little.
Default branch
The default development branch is main. If you still have a local
checkout under the old name, use:
git checkout master
git branch -m master main
git fetch
git branch --unset-upstream
git branch -u origin/main
git symbolic-ref refs/remotes/origin/HEAD refs/remotes/origin/main
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.