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<title>Mutter</title>
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<p>Mutter is a Wayland display server and X11 window manager and compositor library.</p>
<p>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.</p>
<p>Mutter is used by, for example, <a href="https://gitlab.gnome.org/GNOME/gnome-shell/">GNOME Shell</a>, the GNOME
core user interface, and by <a href="https://github.com/elementary/gala">Gala</a>, 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.</p>
<h2 id="contributing">Contributing</h2>
<p>Mutter is <a href="https://spdx.org/licenses/GPL-2.0-or-later">Free Software</a> and is developed in the open.
</p>
<p>To contribute, open merge requests at <a href="https://gitlab.gnome.org/GNOME/mutter"><code
class="language-plaintext highlighter-rouge">https://gitlab.gnome.org/GNOME/mutter</code></a>.</p>
<p>It can be useful to first look at the <a href="https://handbook.gnome.org/">GNOME Handbook</a>
and the documentation and API references below first.
<h2 id="documentation">Documentation</h2>
<ul>
<li><a href="https://gitlab.gnome.org/GNOME/mutter/-/blob/main/doc/coding-style.md">
Coding style and conventions</a></li>
<li><a href="https://gitlab.gnome.org/GNOME/mutter/-/blob/main/doc/git-conventions.md">
Git conventions</a></li>
<li><a href="https://gitlab.gnome.org/GNOME/mutter/-/blob/main/doc/code-overview.md">
Code overview</a></li>
<li><a href="https://gitlab.gnome.org/GNOME/mutter/-/blob/main/doc/building-and-running.md">
Building and Running</a></li>
<li><a href="https://gitlab.gnome.org/GNOME/mutter/-/blob/main/doc/debugging.md">
Debugging</a></li>
<li><a href="https://gitlab.gnome.org/GNOME/mutter/-/blob/main/doc/monitor-configuration.md">
Monitor configuration</a></li>
</ul>
<h2 id="api-reference">API Reference</h2>
<ul class="tiles">
<li><a href="./meta/">
<h3>Meta</h3>
<p>The display server and window manager library. Contains a X11 window manager and compositing manager
implementation, as well as a Wayland display server implementation.</p>
</a></li>
<li><a href="./clutter/">
<h3>Clutter</h3>
<p>
Compositing toolkit, containing an actor and render node based scene graph, and has features such as input
event routing, transformation and animation. Handles compositing, both Wayland surfaces, X11 windows, and is
the basis of the UI toolkit implemented by GNOME Shell.
</p>
</a></li>
<li><a href="./cogl/">
<h3>Cogl</h3>
<p>Hardware acceleration pipeline abstraction layer. Handles things like allocating framebuffer, allocating,
importing and drawing textures, internally using OpenGL.</p>
</a></li>
<li><a href="./mtk/">
<h3>Mtk</h3>
<p>The Meta Toolkit containing utilities shared by other parts of mutter.</p>
</a></li>
</ul>
<h2 id="useful-links">Useful Links</h2>
<ul>
<li><a href="https://gitlab.gnome.org/GNOME/mutter/">Source Code</a></li>
<li><a
href="https://gitlab.gnome.org/GNOME/mutter/-/jobs/artifacts/main/file/coveragereport/index.html?job=coverage">Code
Coverage Report</a></li>
<li><a href="https://blogs.gnome.org/shell-dev/">Development blog</a></li>
</ul>
</div>
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<p>© Mutter, 2021 – 2024</p>
<p><a
href="https://gitlab.gnome.org/GNOME/mutter/-/tree/main/doc/website?ref_type=heads">Website
source</a></p>
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