source: general/graphlib/libjpeg-turbo.xml@ 4dc1987

<?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 libjpeg-download-http "&sourceforge-dl;/libjpeg-turbo/libjpeg-turbo-&libjpeg-turbo-version;.tar.gz">
  <!ENTITY libjpeg-download-ftp  " ">
  <!ENTITY libjpeg-md5sum        "1fdc6494521a8724f5f7cf39b0f6aff3">
  <!ENTITY libjpeg-size          "2.7 MB">
  <!ENTITY libjpeg-buildsize     "55 MB (with tests)">
  <!ENTITY libjpeg-time          "0.5 SBU (with tests; both using parallelism=4)">
]>

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


  <title>libjpeg-turbo-&libjpeg-turbo-version;</title>

  <indexterm zone="libjpeg">
    <primary sortas="a-libjpeg-turbo">libjpeg-turbo</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to libjpeg-turbo</title>

    <para>
      <application>libjpeg-turbo</application> is a fork of the original
      IJG <application>libjpeg</application> which uses SIMD to accelerate
      baseline JPEG compression and decompression.
      <application>libjpeg</application> is a library that implements JPEG
      image encoding, decoding and transcoding.
    </para>

    &lfs121_checked;

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

    <bridgehead renderas="sect3">libjpeg-turbo Dependencies</bridgehead>

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="cmake"/>
    </para>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="nasm"/> or <xref linkend="yasm"/>
      (for building the package with optimized assembly routine)
    </para>

  </sect2>

  <sect2 role="installation">
    <title>Installation of libjpeg-turbo</title>

    <para>
      Install <application>libjpeg-turbo</application> by running the
      following commands:
    </para>

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

cmake -DCMAKE_INSTALL_PREFIX=/usr        \
      -DCMAKE_BUILD_TYPE=RELEASE         \
      -DENABLE_STATIC=FALSE              \
      -DCMAKE_INSTALL_DEFAULT_LIBDIR=lib \
      -DCMAKE_SKIP_INSTALL_RPATH=ON      \
      -DCMAKE_INSTALL_DOCDIR=/usr/share/doc/libjpeg-turbo-&libjpeg-turbo-version; \
      .. &amp;&amp;
make</userinput></screen>

    <para>
      To test the results, issue: <command>make test</command>.
    </para>
<!--
    <note><para>
      If installing <application>libjpeg-turbo</application> over an older jpeg
      installation, not all library symbolic links are updated properly.  To fix
      this before installation, run the following as the <systemitem
      class="username">root</systemitem> user:</para>

<screen role="root"><userinput>rm -f /usr/lib/libjpeg.so*</userinput></screen>

    </note>
-->
    <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>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
      href="../../xincludes/cmake-skip-install-rpath.xml"/>

    <para>
      <option>-DWITH_JPEG8=ON</option>: This switch enables compatibility
      with <application>libjpeg</application> version 8.
    </para>
  </sect2>

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

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

      <seglistitem>
        <seg>
          cjpeg, djpeg, jpegtran, rdjpgcom, tjbench, and wrjpgcom
        </seg>
        <seg>
          libjpeg.so and libturbojpeg.so
        </seg>
        <seg>
          /usr/share/doc/libjpeg-turbo-&libjpeg-turbo-version;
        </seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="cjpeg">
        <term><command>cjpeg</command></term>
        <listitem>
          <para>
            compresses image files to produce a JPEG/JFIF file on the
            standard output. Currently supported input file formats are: PPM
            (PBMPLUS color format), PGM (PBMPLUS gray-scale format),
            BMP, and Targa
          </para>
          <indexterm zone="libjpeg cjpeg">
            <primary sortas="b-cjpeg">cjpeg</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="djpeg">
        <term><command>djpeg</command></term>
        <listitem>
          <para>
            decompresses image files from JPEG/JFIF format to either
            PPM (PBMPLUS color format), PGM (PBMPLUS gray-scale format),
            BMP, or Targa format
          </para>
          <indexterm zone="libjpeg djpeg">
            <primary sortas="b-djpeg">djpeg</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="jpegtran">
        <term><command>jpegtran</command></term>
        <listitem>
          <para>
            is used for lossless transformation of JPEG files
          </para>
          <indexterm zone="libjpeg jpegtran">
            <primary sortas="b-jpegtran">jpegtran</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="rdjpgcom">
        <term><command>rdjpgcom</command></term>
        <listitem>
          <para>
            displays text comments from within a JPEG file
          </para>
          <indexterm zone="libjpeg rdjpgcom">
            <primary sortas="b-rdjpgcom">rdjpgcom</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="tjbench">
        <term><command>tjbench</command></term>
        <listitem>
          <para>
            is used to benchmark the performance of libjpeg-turbo
          </para>
          <indexterm zone="libjpeg tjbench">
            <primary sortas="b-tjbench">tjbench</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="wrjpgcom">
        <term><command>wrjpgcom</command></term>
        <listitem>
          <para>
            inserts text comments into a JPEG file
          </para>
          <indexterm zone="libjpeg wrjpgcom">
            <primary sortas="b-wrjpgcom">wrjpgcom</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libjpeg-lib">
        <term><filename class="libraryfile">libjpeg.so</filename></term>
        <listitem>
          <para>
            contains functions used for reading and writing JPEG images
        </para>
          <indexterm zone="libjpeg libjpeg-lib">
            <primary sortas="c-libjpeg">libjpeg.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>