source: general/graphlib/libjpeg.xml@ ebabf24

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
   "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY libjpeg-download-http "http://www.ijg.org/files/jpegsrc.v&libjpeg-version;.tar.gz">
  <!ENTITY libjpeg-download-ftp "ftp://ftp.uu.net/graphics/jpeg/jpegsrc.v&libjpeg-version;.tar.gz">
  <!ENTITY libjpeg-md5sum "dbd5f3b47ed13132f04c685d608a7547">
  <!ENTITY libjpeg-size "599 KB">
  <!ENTITY libjpeg-buildsize "4.6 MB">
  <!ENTITY libjpeg-time "0.2 SBU">
]>

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

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

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

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

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

    <para>The <application>libjpeg</application> package contains libraries
    that allow compression of image files based on the Joint Photographic Experts
    Group standard. It is a "lossy" compression algorithm.</para>

    <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>

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

  </sect2>

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

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

<screen><userinput>./configure --prefix=/usr --enable-static --enable-shared &amp;&amp;
make</userinput></screen>

    <para>To test the results, issue: <command>make test</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><parameter>--enable-static --enable-shared</parameter>: These switches
    tell <application>libjpeg</application> to build both shared and static
    libraries.</para>

  </sect2>

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

    <sect3>
      <title>Configuration Information</title>

      <xi:include xmlns:xi="http://www.w3.org/2003/XInclude"
      href="../../xincludes/lib-config.xml"/>

    </sect3>

  </sect2>

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

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

      <seglistitem>
        <seg>cjpeg, djpeg, jpegtran, rdjpgcom, and wrjpgcom</seg>
        <seg>libjpeg.{so,a}</seg>
        <seg>None</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="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,a}</filename></term>
        <listitem>
          <para>library is used by many programs for reading and writing
          JPEG format files.</para>
          <indexterm zone="libjpeg libjpeg-lib">
            <primary sortas="c-libjpeg">libjpeg.{so,a}</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>