source: x/lib/gdk-pixbuf.xml@ 36eff21

<?xml version="1.0" encoding="UTF-8"?>
<!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 gdk-pixbuf-download-http
           "&gnome-download-http;/gdk-pixbuf/2.42/gdk-pixbuf-&gdk-pixbuf-version;.tar.xz">
  <!ENTITY gdk-pixbuf-download-ftp  " ">
  <!ENTITY gdk-pixbuf-md5sum        "b2ba2f594122001ac7f89e7d02560497">
  <!ENTITY gdk-pixbuf-size          "6.2 MB">
  <!ENTITY gdk-pixbuf-buildsize     "33 MB (with tests)">
  <!ENTITY gdk-pixbuf-time          "0.1 SBU (With tests; both using parallelism=4)">
]>

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


  <title>gdk-pixbuf-&gdk-pixbuf-version;</title>

  <indexterm zone="gdk-pixbuf">
    <primary sortas="a-gdk-pixbuf">gdk-pixbuf</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to Gdk Pixbuf</title>

    <para>
      The <application>Gdk Pixbuf</application> package is a toolkit for image
      loading and pixel buffer manipulation. It is used by
      <application>GTK+ 2</application> and <application>GTK+ 3</application> to
      load and manipulate images. In the past it was distributed as part of
      <application>GTK+ 2</application> but it was split off into a separate
      package in preparation for the change to <application>GTK+ 3</application>.
    </para>

    &lfs121_checked;

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

    <bridgehead renderas="sect3">Gdk Pixbuf Dependencies</bridgehead>

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="glib2"/> (GObject Introspection required for GNOME),
      <xref linkend="libjpeg"/>,
      <xref linkend="libpng"/>, and
      <xref linkend="shared-mime-info"/>
    </para>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="docutils"/>,
      <xref role="runtime" linkend="librsvg"/> (runtime dependency, needed for
         loading symbolic icons) and
      <xref linkend="libtiff"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="gi-docgen"/>
      (to generate documentation),
      <xref role="runtime" linkend="libavif"/>
      (runtime dependency, needed for loading AVIF images),
      <xref role="runtime" linkend="libjxl"/>
      (runtime dependency, needed for loading JPEG XL images), and
      <xref role="runtime" linkend="webp-pixbuf-loader"/>
      (runtime dependency, needed for loading WebP images)
    </para>

  </sect2>

  <sect2 role="installation">
    <title>Installation of Gdk Pixbuf</title>

    <para>
      Fix an issue causing the package fail to build with
      <parameter>-Dothers=enabled</parameter>:
    </para>

<screen><userinput>sed 's/enabled_loaders_contains/enabled_loaders.contains/' \
    -i tests/meson.build</userinput></screen>

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

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

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

    <para>
      If you have <xref linkend='gi-docgen'/> installed and wish to build
      the API documentation for this package, issue:
    </para>

<screen role='nodump'><userinput>sed "/docs_dir =/s@\$@ / 'gdk-pixbuf-&gdk-pixbuf-version;'@" -i ../docs/meson.build &amp;&amp;
meson configure -Dgtk_doc=true                                         &amp;&amp;
ninja</userinput></screen>

    <para>
      To test the results, issue: <command>ninja test</command>. The tests
      make a heavy use of disk.
    </para>

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

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

    <note>
      <para>
        If you installed the package on to your system using a
        <quote>DESTDIR</quote> method, an important file was not installed and
        should be copied and/or generated. Generate it using the following
        command as the <systemitem class="username">root</systemitem> user:
      </para>

<screen role="root"><userinput>gdk-pixbuf-query-loaders --update-cache</userinput></screen>
    </note>
  </sect2>

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

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

    <!-- 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"/>

    <para>
      <parameter>-Dothers=enabled</parameter>: Enable the loaders for various
      image formats, for example BMP and XPM.
    </para>

    <!-- with 2.42.9, docutils must be installed to generate man pages.
    Without this, you'll get the following output:
    Program rst2man found: ../docs/meson.build:70:2: ERROR: Problem encountered:
    No rst2man found, but man pages were explicitly enabled -->
    <para>
      <option>-Dman=false</option>: Use this option if you do not want to
      generate manual pages, or if you do not want to install
      <xref linkend="docutils" role="nodep"/>.
    </para>
  </sect2>

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

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

      <seglistitem>
        <seg>
          gdk-pixbuf-csource,
          gdk-pixbuf-pixdata,
          gdk-pixbuf-query-loaders, and
          gdk-pixbuf-thumbnailer
        </seg>
        <seg>
          libgdk_pixbuf-2.0.so
        </seg>
        <seg>
          /usr/{include,lib}/gdk-pixbuf-2.0,
          /usr/libexec/installed-tests/gdk-pixbuf,
          /usr/share/installed-tests/gdk-pixbuf,
          /usr/share/gtk-doc/html/gdk-pixbuf, and
          /usr/share/thumbnailers
        </seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="gdk-pixbuf-csource">
        <term><command>gdk-pixbuf-csource</command></term>
        <listitem>
          <para>
            is a small utility that generates C code containing images, used
            for compiling images directly into programs
          </para>
          <indexterm zone="gdk-pixbuf gdk-pixbuf-csource">
            <primary sortas="b-gdk-pixbuf-csource">gdk-pixbuf-csource</primary>
          </indexterm>
        </listitem>
      </varlistentry>

     <varlistentry id="gdk-pixbuf-pixdata">
        <term><command>gdk-pixbuf-pixdata</command></term>
        <listitem>
          <para>
            is a tool used to convert GdkPixbuf to GdkPixdata
          </para>
          <indexterm zone="gdk-pixbuf gdk-pixbuf-pixdata">
            <primary sortas="b-gdk-pixbuf-pixdata">gdk-pixbuf-pixdata</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gdk-pixbuf-query-loaders">
        <term><command>gdk-pixbuf-query-loaders</command></term>
        <listitem>
          <para>
            collects information about loadable modules for
            <application>Gdk Pixbuf</application> and writes it
            to the default cache file location, or to stdout
          </para>
          <indexterm zone="gdk-pixbuf gdk-pixbuf-query-loaders">
            <primary sortas="b-gdk-pixbuf-query-loaders">gdk-pixbuf-query-loaders</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="gdk-pixbuf-thumbnailer">
        <term><command>gdk-pixbuf-thumbnailer</command></term>
        <listitem>
          <para>
            creates thumbnails of pictures for use in other applications
          </para>
          <indexterm zone="gdk-pixbuf gdk-pixbuf-thumbnailer">
            <primary sortas="b-gdk-pixbuf-thumbnailer">gdk-pixbuf-thumbnailer</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libgdk_pixbuf-2">
        <term><filename class="libraryfile">libgdk_pixbuf-2.0.so</filename></term>
        <listitem>
          <para>
            contains functions used to load and render images
          </para>
          <indexterm zone="gdk-pixbuf libgdk_pixbuf-2">
            <primary sortas="c-libgdk_pixbuf-2">libgdk_pixbuf-2.0.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <!-- Split off into gdk-pixbuf-xlib
      <varlistentry id="libgdk_pixbuf_xlib-2">
        <term><filename class="libraryfile">libgdk_pixbuf_xlib-2.0.so</filename></term>
        <listitem>
          <para>
            contains functions used to manipulate images and interfaces with
            <application>Xlib</application>
          </para>
          <indexterm zone="gdk-pixbuf libgdk_pixbuf_xlib-2">
            <primary sortas="c-libgdk_pixbuf_xlib-2">libgdk_pixbuf_xlib-2.0.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>
      -->
    </variablelist>

  </sect2>

</sect1>