076b3664a3
Store and load the layout mode for each logical monitor configuration in monitors.xml by introducing a new <layoutmode> element. The value of the element can be either "logical" or "physical". The layout mode is also made part of the monitor configuration key. Right now this isn't doing a lot: When no <layoutmode> is found on the config (this is the case with all existing configs), we'll keep using the layout mode expected by the system, without updating the config file. When changing an existing, or introducing a new configuration, we'll now store the current layout mode with the config though, and load it again on the next start of mutter. This is still not problematic as long as mutters expected layout mode doesn't change (eg. by turning on/off "scale-monitor-framebuffers"). When the expected layout mode of mutter switches between restarts, the monitor config is now still loaded but remains unused, and mutter will create (and store) a new one with the other layout mode. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3596>
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 of 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 first look at the GNOME Handbook and the documentation and API references below first.
Documentation
- Coding style and conventions
- Git conventions
- Code overview
- Building and Running
- Debugging
- Monitor configuration
API Reference
- Meta: https://mutter.gnome.org/meta/
- Clutter: https://mutter.gnome.org/clutter/
- Cogl: https://mutter.gnome.org/cogl/
- CoglPango: https://mutter.gnome.org/cogl-pango/
- Mtk: https://mutter.gnome.org/mtk/
Meetings
There are recurring meetings to discuss development of GNOME Shell, mutter and related components.
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.