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Xwayland may post damages for an X11 window as soon as the frame callback is triggered, while the X11 window manager/compositor has not yet finished updating the windows. If Xwayland becomes compliant enough to not permit updates after the buffer has been committed (see [1]), then the partial redraw of the X11 window at the time it was posted will show on screen. To avoid that issue, the X11 window manager can use the X11 property `_XWAYLAND_ALLOW_COMMITS` to control when Xwayland should be allowed to post the pending damages. Add `freeze_commits()` and `thaw_commits()` methods to `MetaWindowX11` which are a no-op on plain X11, but sets `_XWAYLAND_ALLOW_COMMITS` on the toplevel X11 windows running on Xwayland. [1] https://gitlab.freedesktop.org/xorg/xserver/merge_requests/316 See-also: https://gitlab.gnome.org/GNOME/mutter/merge_requests/855 https://gitlab.gnome.org/GNOME/mutter/merge_requests/942 |
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| .gitlab/issue_templates | ||
| .gitlab-ci | ||
| clutter | ||
| cogl | ||
| data | ||
| doc | ||
| meson | ||
| po | ||
| src | ||
| tools | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| config.h.meson | ||
| COPYING | ||
| 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.
The coding style used is primarily the GNU flavor of the GNOME coding
style
with some minor additions such as preferring stdint.h types over GLib
fundamental types, and a soft 80 character line limit. However, in general,
look at the file you're editing for inspiration.
Commit messages should follow the GNOME commit message guidelines. We require an URL to either an issue or a merge request in each commit.
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.