source: gnome/platform/mutter.xml@ 4454113

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY mutter-download-http "&gnome-download-http;/mutter/&gnome-42;/mutter-&mutter-version;.tar.xz">
  <!ENTITY mutter-download-ftp  "&gnome-download-ftp;/mutter/&gnome-42;/mutter-&mutter-version;.tar.xz">
  <!ENTITY mutter-md5sum        "18b6f716ba0f6b899ed2edb08ab4ca68">
  <!ENTITY mutter-size          "2.6 MB">
  <!ENTITY mutter-buildsize     "130 MB (without tests)">
  <!ENTITY mutter-time          "0.5 SBU (Using parallelism=4)">
  <!ENTITY mutter-time-systemd  "0.5 SBU (Using parallelism=4, add 1.0 SBU for tests)">
]>

<sect1 id="mutter" xreflabel="Mutter-&mutter-version;">
  <?dbhtml filename="mutter.html"?>

  <sect1info>
    <date>$Date$</date>
  </sect1info>

  <title>Mutter-&mutter-version;</title>

  <indexterm zone="mutter">
    <primary sortas="a-Mutter">Mutter</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to Mutter</title>

    <para>
      <application>Mutter</application> is the window manager for
      <application>GNOME</application>. It is not invoked directly,
      but from <application>GNOME Session</application> (on a
      machine with a hardware accelerated video driver).
    </para>

    &lfs112_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&mutter-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&mutter-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &mutter-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &mutter-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &mutter-buildsize;
        </para>
      </listitem>
      <listitem revision='sysv'>
        <para>
          Estimated build time: &mutter-time;
        </para>
      </listitem>
      <listitem revision='systemd'>
        <para>
          Estimated build time: &mutter-time-systemd;
        </para>
      </listitem>
    </itemizedlist>
    <!--
    <bridgehead renderas="sect3">Additional Downloads</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Recommended patch:
          <ulink url="&patch-root;/mutter-&mutter-version;-consolidated_fixes-1.patch"/>
        </para>
      </listitem>
    </itemizedlist>
    -->
    <bridgehead renderas="sect3">Mutter Dependencies</bridgehead>

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <!-- now using internal shipped clutter and cogl copies -->
      <!-- <xref linkend="clutter"/>, -->
      <xref linkend="gnome-settings-daemon"/>,
      <xref linkend="graphene"/>,
      <xref linkend="libxcvt"/>,
      <xref linkend="libxkbcommon"/>,
      <xref linkend="pipewire"/>, and
      <xref linkend="zenity"/>
    </para>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="desktop-file-utils"/>,
      <xref linkend="gobject-introspection"/>,
      <xref linkend="startup-notification"/>, and
      <xref linkend="sysprof"/>
    </para>

    <bridgehead renderas="sect4">Recommended (Required to
    build the Wayland compositor)</bridgehead>
    <para role="recommended">
      <xref linkend="libinput"/>,
      <xref linkend="wayland"/>,
      <xref linkend="wayland-protocols"/>, and
      <xref linkend="xwayland"/>.
      Additionally, <xref linkend="gtk3"/> needs to be built with
      <application>Wayland</application> support.
    </para>

    <bridgehead renderas="sect4"
                revision="sysv">Recommended (Runtime)</bridgehead>
    <para role="recommended" revision="sysv">
      <xref linkend="blocaled" role="runtime"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="python-dbusmock"/> (required for tests) and
      <xref linkend="xorg-server"/> (for X11 sessions)
    </para>

    <!-- NOTE: Mutter compiles git versions of COGL and Clutter for it's own
    internal use. This is because the wayland support upstream isn't advanced
    enough for the graphics stack used in Mutter. -->

    <para condition="html" role="usernotes">User Notes:
      <ulink url="&blfs-wiki;/mutter"/>
    </para>

  </sect2>

  <sect2 role="installation">
    <title>Installation of Mutter</title>
    <!--
    <para>
      First, apply a patch that fixes annoying bugs found after GNOME 42
      release:
    </para>

<screen><userinput>patch -Np1 -i ../mutter-&mutter-version;-consolidated_fixes-1.patch</userinput></screen>
-->
    <para>
      Install <application>Mutter</application> by running the following
      commands:
    </para>

<screen><userinput>mkdir build &amp;&amp;
cd    build &amp;&amp;

meson --prefix=/usr --buildtype=debugoptimized -Dtests=false .. &amp;&amp;
ninja</userinput></screen>

<!--
    <para>
      To test the results, issue:
      <command>dbus-run-session ninja test</command>. The tests
      require an active X session to run correctly. It is not necessary to
      run a  separate D-bus session if not in a GNOME session, but it
      provides a clean environment in any case. One test,
      <filename>native-headless</filename>, is known to fail.
    </para>
    -->
    <!-- there are no added problems in sysv, AFAICT. Running the tests is
    not easy whatever the init system. But using the instructions below in
    a gnome session on sysv works (no test failure)...
    <para revision='sysv'>
       This package does not come with a test suite that runs properly in the
       SystemV environment.
    </para>
    -->

    <para>
      The test suite requires debug functions to be enabled in the build, and an
      external program called <command>xvfb-run</command>.  If you wish to run
      the tests, you should download and install it before running
      <command>meson</command>.

      You can obtain it from <ulink
      url="&sources-anduin-http;/mutter/xvfb-run">xvfb-run</ulink>, and install
      it with executable permissions in <filename
      class="directory">/usr/bin</filename>.  <command>xvfb-run</command> needs
      <command>Xvfb</command> at runtime, and <command>Xvfb</command> can be
      installed from either <xref linkend='xorg-server'/> or <xref
      linkend='xwayland'/>.

      You should also replace <parameter>-Dtests=false</parameter> in the
      <command>meson</command> command, with
      <parameter>-Dtests=true</parameter>.  The test
      suite requires the mutter schema to be installed on the system, so it is
      better to run the tests after installing the package.
    </para>

    <para>
      You can also test basic functions of <application>Mutter</application>
      following <xref linkend='mutter-starting'/>, after installing it.
    </para>

    <para>
      Now, as the <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"><userinput>ninja install</userinput></screen>

    <para>
      The tests can now be run: issue
      <command>ninja test</command>. The tests
      require an active X or wayland session.
      The <filename>native-unit</filename> is known to fail.
      A lot of tests will fail if the opengl rendering is not done in hardware.
    </para>
  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <!-- https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/5512
         If debug is disabled, the "assertion 'CLUTTER_IS_ACTOR (self)'
         failed" message will turn into a crash.  Enabling debug is just a
         work around, it's not a proper fix.  -->
    <para>
      <parameter>--buildtype=debugoptimized</parameter>: Override the
      default buildtype (<quote>debug</quote>), which would produce
      unoptimized binaries.  It's used instead of
      <option>--buildtype=release</option> to work around an issue
      causing gnome-shell to crash.
    </para>
<!--
    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
      href="../../xincludes/meson-buildtype-release.xml"/>
-->
    <para>
      <parameter>-Dtests=false</parameter>: Prevents building the tests,
      and removes a hard requirement on <command>xvfb-run</command>.
    </para>

    <para>
      <option>-Dprofiler=false</option>: Use this option if
      <application>Sysprof</application> is not installed, and you don't
      want meson to download <application>Sysprof</application> source
      code.
    </para>

  </sect2>

  <sect2 role="starting" id="mutter-starting">
    <title>Starting Mutter</title>

    <!-- Mutter as a Wayland compositor Works with mutter-42.4 and 43.0.
         IIRC mutter can also be used as a X window manager: just replace
         "twm" with "mutter &dash;&dash;x11" in xinitrc. But I've not tested
         such a configuration recently (I don't build Xorg Server or xinit
         these days.  -->

    <para>
      <application>Mutter</application> is normally used as a component of
      <application>gnome-shell</application>, but it can be used as a
      standalone Wayland compositor too.  To run
      <application>Mutter</application> as a Wayland compositor, in a
      virtual console, issue:
    </para>

    <screen role='nodump'><userinput>mutter --wayland -- vte-2.91</userinput></screen>

    <para>
      Replace <command>vte-2.91</command> with the command line for the
      first application you want in the Wayland session. Note that once this
      application exits, the Wayland session will be terminated.
    </para>

    <para>
      <application>Mutter</application> can also function as a nested
      compositor in another Wayland session.  In a terminal emulator, issue:
    </para>

    <screen role='nodump'><userinput>MUTTER_DEBUG_DUMMY_MODE_SPECS=1920x1080 mutter --wayland --nested -- vte-2.91</userinput></screen>

    <para>
      Replace <replaceable>1920x1080</replaceable> with the size you want
      for the nested Wayland session.
    </para>
  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Libraries</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
          mutter
        </seg>
        <seg>
          libmutter-10.so
        </seg>
        <seg>
          /usr/{lib,include,libexec/installed-tests,share/{,installed-tests}}/mutter-10
        </seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="mutter-prog">
        <term><command>mutter</command></term>
        <listitem>
          <para>
            is a <application>Clutter</application> based compositing
            <application>GTK+</application> Window Manager
          </para>
          <indexterm zone="mutter mutter-prog">
            <primary sortas="b-mutter">mutter</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libmutter">
        <term><filename class="libraryfile">libmutter-9.so</filename></term>
        <listitem>
          <para>
            contains the <application>Mutter</application> API functions
          </para>
          <indexterm zone="mutter libmutter">
            <primary sortas="c-libmutter">libmutter-9.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>