7e3d1e26a1
This ensures they remain perfectly smooth regardless of how the dispatch time has been adjusted/optimized/delayed/jittered. Idea by Ivan Molodetskikh <yalterz@gmail.com> For example, dragging a window on a 60Hz monitor: BEFORE delta(time_us) = 17014μs delta(time_us) = 15998μs delta(time_us) = 17006μs delta(time_us) = 16975μs delta(time_us) = 16001μs delta(time_us) = 17002μs delta(time_us) = 17006μs delta(time_us) = 16004μs AFTER delta(time_us) = 16667μs delta(time_us) = 16667μs delta(time_us) = 16670μs delta(time_us) = 16667μs delta(time_us) = 16669μs delta(time_us) = 16668μs delta(time_us) = 16664μs delta(time_us) = 16674μs Caveat 1: Because we don't know a "next presentation time" on the first frame, the interval between the first and second frame will usually be different to the subsequent steady interval. So this change increases the jitter of just frame 2, but eliminates jitter thereafter. Caveat 2: `clutter_frame_clock_schedule_update_now` schedules updates earlier than `clutter_frame_clock_schedule_update`. This means potentially you could get multiple frames targeting the same "next presentation time". That doesn't really change here though - we're dispatching at the same times as we used to and just giving timelines a better vsync-aligned timestamp now. Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/25 Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2161> |
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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_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 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.