a9a9a0d1c5
Replace the default master clock with multiple frame clocks, each driving its own stage view. As each stage view represents one CRTC, this means we draw each CRTC with its own designated frame clock, disconnected from all the others. For example this means we when using the native backend will never need to wait for one monitor to vsync before painting another, so e.g. having a 144 Hz monitor next to a 60 Hz monitor, things including both Wayland and X11 applications and shell UI will be able to render at the corresponding monitor refresh rate. This also changes a warning about missed frames when sending _NETWM_FRAME_TIMINGS messages to a debug log entry, as it's expected that we'll start missing frames e.g. when a X11 window (via Xwayland) is exclusively within a stage view that was not painted, while another one was, still increasing the global frame clock. Addititonally, this also requires the X11 window actor to schedule timeouts for _NET_WM_FRAME_DRAWN/_NET_WM_FRAME_TIMINGS event emitting, if the actor wasn't on any stage views, as now we'll only get the frame callbacks on actors when they actually were painted, while in the past, we'd invoke that vfunc when anything was painted. Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/903 Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/3 https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1285 |
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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.