source: x/lib/cairo.xml@ cd5a937

<?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 cairo-download-http
    "http://cairographics.org/releases/cairo-&cairo-version;.tar.xz">
  <!ENTITY cairo-download-ftp  " ">
  <!ENTITY cairo-md5sum        "87649eb75789739d517c743e94879e51">
  <!ENTITY cairo-size          "41 MB">
  <!ENTITY cairo-buildsize     "178 MB">
  <!ENTITY cairo-time          "1.1 SBU">
]>

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

  <sect1info>
    <othername>$LastChangedBy$</othername>
    <date>$Date$</date>
  </sect1info>

  <title>cairo-&cairo-version;</title>

  <indexterm zone="cairo">
    <primary sortas="a-cairo">cairo</primary>
  </indexterm>

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

    <para>
      <application>Cairo</application> is a 2D graphics library with support for
      multiple output devices. Currently supported output targets include the
      <application>X</application> Window System, win32, image buffers,
      PostScript, PDF and SVG. Experimental backends include OpenGL, Quartz and
      XCB file output. <application>Cairo</application> is designed to produce
      consistent output on all output media while taking advantage of display
      hardware acceleration when available (e.g., through the X Render
      Extension). The <application>Cairo</application> API provides operations
      similar to the drawing operators of PostScript and PDF. Operations in
      <application>Cairo</application> include stroking and filling cubic
      B&eacute;zier splines, transforming and compositing translucent images,
      and antialiased text rendering. All drawing operations can be transformed
      by any
      <ulink url="http://en.wikipedia.org/wiki/Affine_transformation">affine
      transformation</ulink> (scale, rotation, shear, etc.).
    </para>

    &lfs71_checked;

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

    <bridgehead renderas="sect3">Additional Downloads</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Required patch (if you intend to compile any Mozilla products):
          <ulink url="&patch-root;/cairo-&cairo-version;-expose-snapshot-1.patch"/>
        </para>
      </listitem>
    </itemizedlist>

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

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="libpng"/>, <!-- I would not dare not to use this one -->
      <xref linkend="pixman"/> and 
      <xref linkend="pkgconfig"/>.
    </para>

    <bridgehead renderas="sect4">Recommended (Required if building GTK+)</bridgehead>
    <para role="recommended">
      <xref linkend="fontconfig"/> and
      <xref linkend="xorg7-lib"/>.
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="cogl"/>,
      <ulink url="http://www.directfb.org/">DirectFB</ulink>,
      <xref linkend="gs"/> (for testing the postscript backend),
      <xref linkend="gtk2"/> (for testing the PDF backend),
      <xref linkend="gtk-doc"/>,
      <xref linkend="libdrm"/>,
      <xref linkend="librsvg"/> (for testing the SVG backend),
      <ulink url="http://libspectre.freedesktop.org">libspectre</ulink> (for
      testing the PDF backend),
      <xref linkend="mesalib"/>,
      <xref linkend="poppler"/> (for testing the PDF backend),
      <xref linkend="qt4"/>,
      <ulink url="http://code.google.com/p/skia/">Skia</ulink> and
      <ulink url="http://www.valgrind.org">Valgrind</ulink>.
    </para>

    <note>
      <para>
        There is a reciprocal dependency with the
        <application>Gtk 2</application>, <application>Librsvg</application> and
        <application>Poppler</application> packages. As the test suite is
        currently unreliable, it is best to simply skip it at this time.
      </para>
    </note>

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

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

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

<screen><userinput>sed -i 's#check-plt.sh ##' src/Makefile.in &amp;&amp;
patch -p1 &lt; ../cairo-&cairo-version;-expose-snapshot-1.patch &amp;&amp;
./configure --prefix=/usr --disable-static --enable-tee --enable-xcb &amp;&amp;
make</userinput></screen>

    <para>
      Note that the tests take a long time to run, many of them fail for unknown
      reasons and it has been known to cause a kernel panic. <!-- I suspect that
      the panic was due to a bug in the xf86-video-ati driver but I can't be
      sure as the system locked up hard. cairo-1.12.0 has exposed bugs in other
      parts of Xorg https://bugs.freedesktop.org/show_bug.cgi?id=47266 Andy
      2012-04-22 --> If you want to run the tests issue:
      <command>make -k check</command>.
    </para>

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

<screen role="root"><userinput>make install</userinput></screen>
  </sect2>

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

    <para>
      <command>sed -i 's#check-plt.sh ##' src/Makefile.in</command>: This sed
      disables running a test which is known to fail with the expose-snapshot
      patch.
    </para>

    <para>
      <command>patch -p1 &lt;
      ../cairo-&cairo-version;-expose-snapshot-1.patch</command>: This patch
      exposes some private functions that <application>Firefox</application>
      relies on. Applying this patch allows <application>Firefox</application>
      to use the system installed <application>Cairo</application>.
    </para>

    <para>
      <option>--enable-tee</option>: This is used by
      <application>Firefox</application>. If you don't enable the Cairo's tee
      surface backend you won't be able to build
      <application>Firefox</application> with
      <option>--enable-system-cairo</option>.
    </para>

    <para>
      <option>--enable-gl</option>: Enable <application>Cairo</application>'s
      OpenGL backend.
    </para>

    <para>
      <option>--enable-xcb</option>: Enable <application>Cairo</application>'s
      libxcb backend.
    </para>

    <para>
      <option>--enable-vg</option>: Enable the <application>Cairo</application>
      <ulink url="http://en.wikipedia.org/wiki/OpenVG">OpenVG</ulink> backend 
      (requires <xref linkend="mesalib"/> installed, configured with
      --enable-gallium-egl and --enable-openvg).
    </para>

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

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
    href="../../xincludes/gtk-doc-rebuild.xml"/>
  </sect2>

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

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

      <seglistitem>
        <seg>
          cairo-sphinx and cairo-trace
        </seg>
        <seg>
          libcairo.so, libcairo-gobject.so and
          libcairo-script-interpreter.so
        </seg>
        <seg>
          /usr/include/cairo, /usr/lib/cairo and
          /usr/share/gtk-doc/html/cairo
        </seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="cairo-trace">
        <term><command>cairo-trace</command></term>
        <listitem>
          <para>
            generates a log of all calls made by an application to
            <application>Cairo</application>.
          </para>
          <indexterm zone="cairo cairo-trace">
            <primary sortas="b-cairo-trace">cairo-trace</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libcairo">
        <term><filename class='libraryfile'>libcairo.so</filename></term>
        <listitem>
          <para>
            contains the 2D graphics functions required for rendering to the
            various output targets.
          </para>
          <indexterm zone="cairo libcairo">
            <primary sortas="c-libcairo">libcairo.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libcairo-gobject">
        <term><filename class='libraryfile'>libcairo-gobject.so</filename></term>
        <listitem>
          <para>
            contains functions that integrate
            <application>Cairo</application> with <xref linkend="glib2"/>'s
            GObject type system.
          </para>
          <indexterm zone="cairo libcairo-gobject">
            <primary sortas="c-libcairo-gobject">libcairo-gobject.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libcairo-script-interpreter">
        <term><filename class='libraryfile'>libcairo-script-interpreter.so</filename></term>
        <listitem>
          <para>
            contains the script interpreter functions for executing and
            manipulating <application>Cairo</application> execution traces.
          </para>
          <indexterm zone="cairo libcairo-script-interpreter">
            <primary sortas="c-libcairo-script-interpreter">libcairo-script-interpreter.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>
    </variablelist>
  </sect2>
</sect1>