26d8b9c69b
To avoid communicating lower frame rate to clients through frame callbacks, it is important to avoid delaying the source dispatch when a dispatch is already scheduled. To that end, the previous logic would emit pending frame callbacks immediately in case a source dispatch was still scheduled for the previous refresh cycle and then (potentially) schedule another source dispatch for the current refresh cycle. However, emitting pending frame callbacks immediately would send frame events for every pending frame callback, including for the current "empty" update. Scheduling another source dispatch for the current cycle was then unnecessary and potentially undesirable because there may not even be another "empty" update during the cycle. Instead, let the already-scheduled source dispatch handle emitting any pending frame callbacks, and do not schedule an additional source dispatch for the current cycle as it may not be needed. This approach is useful because it removes an implicit assumption that the refresh rate is fixed and that target presentation time remains constant within a refresh cycle. This assumption does not apply for VRR. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3521> |
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| .gitlab/issue_templates | ||
| .gitlab-ci | ||
| clutter | ||
| cogl | ||
| data | ||
| doc | ||
| meson | ||
| mtk | ||
| po | ||
| src | ||
| subprojects | ||
| tools | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| check-style.py | ||
| config.h.meson | ||
| COPYING | ||
| logo.svg | ||
| meson_options.txt | ||
| meson.build | ||
| 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 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/
- Cally: https://mutter.gnome.org/cally/
- Cogl: https://mutter.gnome.org/cogl/
- CoglPango: https://mutter.gnome.org/cogl-pango/
- Mtk: https://mutter.gnome.org/mtk/
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.