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Dor Askayo 627ab24721 surface-actor: Add meta_surface_actor_schedule_update()
This function allows scheduling a stage update in the context of a
surface actor and emit the "update-scheduled" signal. This signal is
similar to "repaint-scheduled", but can be used to be notified of
updates that do not necessarily result in a repaint.

With variable refresh rate, any update potentially affecting the
frame pacing of a surface actor needs to be handled differently
depending on whether that surface actor drives the refresh rate or
not.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1154>
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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

API Reference

License

Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.