source: x/lib/pango.xml@ 3fb307f

<?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 pango-download-http "&gnome-download-http;/pango/&pango-minor;/pango-&pango-version;.tar.xz">
  <!ENTITY pango-download-ftp  "&gnome-download-ftp;/pango/&pango-minor;/pango-&pango-version;.tar.xz">
  <!ENTITY pango-md5sum        "fd4b0b23915d6a0255317f811bea4215">
  <!ENTITY pango-size          "4.1 MB">
  <!ENTITY pango-buildsize     "47 MB (with tests)">
  <!ENTITY pango-time          "0.1 SBU (Using parallelism=4; with tests)">
]>

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


  <title>Pango-&pango-version;</title>

  <indexterm zone="pango">
    <primary sortas="a-Pango">Pango</primary>
  </indexterm>

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

    <para>
      <application>Pango</application> is a library for laying out and rendering
      text, with an emphasis on internationalization. It can be used anywhere
      that text layout is needed, though most of the work on
      <application>Pango</application> so far has been done in the context of
      the <application>GTK+</application> widget toolkit.
    </para>

    &lfs112_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&pango-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&pango-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &pango-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &pango-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &pango-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &pango-time;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Pango Dependencies</bridgehead>

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="fontconfig"/> (must be built with
       <xref linkend="freetype2"/> using <xref linkend="harfbuzz"/>),
      <xref linkend="fribidi"/>, and
      <xref linkend="glib2"/>

    </para>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="cairo"/>,
      <xref linkend="gobject-introspection"/> (Required if building GNOME), and
      <xref linkend="xorg7-lib"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="cantarell-fonts"/> (for tests),
  <!--<xref linkend="gtk-doc"/>,-->
      <xref linkend="sysprof"/>,
      <xref linkend="gi-docgen"/> (to generate documentation),
      <ulink url="https://ftpmirror.gnu.org/gnu/help2man">help2man</ulink>, and
      <ulink url="https://linux.thai.net/projects/libthai">libthai</ulink>
    </para>

    <para condition="html" role="usernotes">
      User Notes: <ulink url="&blfs-wiki;/pango"/>
    </para>
  </sect2>

  <sect2 role="installation">
    <title>Installation of Pango</title>

    <para>Fix the installation directory of API documentation:</para>

<screen><userinput>sed "/docs_dir =/s@\$@ / 'pango-&pango-version;'@" -i docs/meson.build</userinput></screen>

    <para>
      Install <application>Pango</application> by running the following
      commands:
    </para>

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

meson --prefix=/usr --buildtype=release --wrap-mode=nofallback .. &amp;&amp;
ninja</userinput></screen>

    <para>
      To test the results, issue: <command>ninja test</command>. Two tests,
      <filename>test-font</filename> and
      <filename>test-layout</filename>
      <!--<filename>test-itemize</filename>, are--> are known to fail. <!--if
      <xref linkend="cantarell-fonts"/> are not installed.-->
      <!-- the other problematic tests get skipped now -->
      <!-- Even with cantarell-fonts, pango-1.50.9 test-font fails again. -->
    </para>

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

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

<!--
This requires the external help2man program to generate pango-view.1.  The version
from lsb_release is insufficient.  I'm not sure if the command below is needed
or not if the newer help2man is present. - Bruce

install -vm 644 ../utils/pango-view.1.in /usr/share/man/man1/pango-view.1</userinput></screen>
-->

  </sect2>

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

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
      href="../../xincludes/meson-buildtype-release.xml"/>

    <para>
      <option>-Dgtk_doc=true</option>: Although the default value of this
      option is <option>false</option>, the API documentation will be rebuilt
      and installed if <xref linkend="gi-docgen"/> is available, either
      as a meson submodule (see below the <option>--wrap-mode</option> option)
      or on the system. The only difference when setting this option to
      <option>true</option> is that meson exits with in error if gi-docgen
      is not available.
    </para>

    <para>
      <option>-Dintrospection=disabled</option>: Use this switch if you do not
      want to use <xref linkend="gobject-introspection"/>.
    </para>

    <!-- gi-docgen can get installed without this, if deps exist -->
    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
      href="../../xincludes/meson-wrap-nofallback.xml"/>

  </sect2>

  <sect2 role="configuration">
    <title>Configuring Pango</title>

    <sect3 id="pango-config">
      <title>Config Files</title>

      <para>
        <filename>/etc/pango/pangorc</filename>, <filename>~/.pangorc</filename>
        and the file specified in the environment variable
        <envar>PANGO_RC_FILE</envar>
      </para>

      <indexterm zone="pango pango-config">
        <primary sortas="e-etc-pango-pangorc">/etc/pango/pangorc</primary>
      </indexterm>

      <indexterm zone="pango pango-config">
        <primary sortas="e-AA.pangorc">~/.pangorc</primary>
      </indexterm>
    </sect3>
<!--
    <sect3>
      <title>Configuration Information</title>

      <para>
        The <application>Pango</application> module path is specified by the key
        <userinput><parameter>Pango/ModulesPath</parameter></userinput> in the
        <application>Pango</application> config database, which is read from the
        config files listed above.
      </para>

    </sect3>-->

  </sect2>

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

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

      <seglistitem>
        <seg>
          pango-list, pango-segmentation, and pango-view
        </seg>
        <seg>
          libpango-1.0.so, libpangocairo-1.0.so, libpangoft2-1.0.so,
          and libpangoxft-1.0.so
        </seg>
        <seg>
          /usr/include/pango-1.0 and
          /usr/share/doc/pango-&pango-version; (if gi-docgen is available)
        </seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="pango-list">
        <term><command>pango-list</command></term>
        <listitem>
          <para>
            displays a list of fonts that <application>Pango</application>
            can use that are currently installed on the system
          </para>
          <indexterm zone="pango pango-list">
            <primary sortas="b-pango-list">pango-list</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="pango-segmentation">
        <term><command>pango-segmentation</command></term>
        <listitem>
          <para>
            shows text segmentation as determined by Pango.
          </para>
          <indexterm zone="pango pango-segmentation">
            <primary sortas="b-pango-segmentation">pango-segmentation</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="pango-view">
        <term><command>pango-view</command></term>
        <listitem>
          <para>
            renders a given text file through <application>Pango</application>
            for viewing purposes
          </para>
          <indexterm zone="pango pango-view">
            <primary sortas="b-pango-view">pango-view</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libpango-1">
        <term><filename class="libraryfile">libpango-1.0.so</filename></term>
        <listitem>
          <para>
            contains low level layout rendering routines, a high level driver for
            laying out entire blocks of text, and routines to assist in editing
            internationalized text
          </para>
          <indexterm zone="pango libpango-1">
            <primary sortas="c-libpango-1">libpango-1.0.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>