23f3c17f0c
Not with VRR though, because the deadline timer fires at most every 33ms then. Previously, the deadline timer was used only for cursor-only updates. Using it for other updates means they pick up the latest cursor position available at the deadline, resulting in the lowest possible input→output latency for cursor movement. TTBOMK this unlocks the full potential of the KMS thread given the current atomic KMS API. v2: * Don't call meta_kms_update_merge_from with twice the same update pointer. v3: * Don't arm deadline timer if crtc_frame->pending_page_flip is true. v4: * Tweak want_deadline_timer indentation per check-code-style CI job. v5: * Also check crtc_frame->await_flush for want_deadline_timer. v6: * Tweak coding style to keep lines shorter. (Jonas Ådahl) Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3964>
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/
- 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.