source: general/graphlib/libjpeg.xml@ ff769b8c

<?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 "0.15 SBU">
]>

<sect1 id="libjpeg" xreflabel="libjpeg-&libjpeg-version;">
<sect1info>
<othername>$LastChangedBy$</othername>
<date>$Date$</date>
</sect1info>
<?dbhtml filename="libjpeg.html"?>
<title>libjpeg-&libjpeg-version;</title>
<indexterm zone="libjpeg">
<primary sortas="a-Libjpeg">Libjpeg</primary></indexterm>

<sect2>
<title>Introduction to <application>libjpeg</application></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>

<sect3><title>Package information</title>
<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>
</sect3>

</sect2>

<sect2>
<title>Installation of <application>libjpeg</application></title>

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

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

<para>Now, as the root user:</para>

<screen><userinput role='root'><command>make install</command></userinput></screen>

</sect2>

<sect2>
<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>
<title>Configuring <application>libjpeg</application></title>

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

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

</sect3>

</sect2>

<sect2>
<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"?>

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

</sect2>

</sect1>