mirror of
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52d29f7a42
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@2304 af4574ff-66df-0310-9fd7-8a98e5e911e0
114 lines
5.5 KiB
XML
114 lines
5.5 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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<!ENTITY libjpeg-download-http "http://www.ijg.org/files/jpegsrc.v&libjpeg-version;.tar.gz">
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<!ENTITY libjpeg-download-ftp "ftp://ftp.uu.net/graphics/jpeg/jpegsrc.v&libjpeg-version;.tar.gz">
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<!ENTITY libjpeg-size "599 KB">
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<!ENTITY libjpeg-buildsize "3.7 MB">
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<!ENTITY libjpeg-time "0.26 SBU">
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]>
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<sect1 id="libjpeg" xreflabel="libjpeg-&libjpeg-version;">
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<?dbhtml filename="libjpeg.html"?>
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<title>libjpeg-&libjpeg-version;</title>
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<sect2>
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<title>Introduction to <application>libjpeg</application></title>
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<para>The <application>libjpeg</application> package contains libraries
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that allow compression of image files based on the Joint Photographic Experts
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Group standard. It is a "lossy" compression algorithm.</para>
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<sect3><title>Package information</title>
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<itemizedlist spacing='compact'>
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<listitem><para>Download (HTTP): <ulink url="&libjpeg-download-http;"/></para></listitem>
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<listitem><para>Download (FTP): <ulink url="&libjpeg-download-ftp;"/></para></listitem>
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<listitem><para>Download size: &libjpeg-size;</para></listitem>
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<listitem><para>Estimated Disk space required: &libjpeg-buildsize;</para></listitem>
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<listitem><para>Estimated build time: &libjpeg-time;</para></listitem></itemizedlist>
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</sect3>
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</sect2>
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<sect2>
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<title>Installation of <application>libjpeg</application></title>
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<para>Install <application>libjpeg</application> by running the following commands:</para>
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<screen><userinput><command>./configure --enable-static --enable-shared --prefix=/usr &&
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make &&
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make install</command></userinput></screen>
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</sect2>
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<sect2>
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<title>Command explanations</title>
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<para><command>./configure --enable-static --enable-shared --prefix=/usr</command>: This command tells libjpeg to build both shared and static libraries and
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to install them with a base of <filename>/usr</filename>.</para>
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</sect2>
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<sect2>
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<title>Configuring <application>libjpeg</application></title>
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<sect3><title>Configuration Information</title>
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<xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="../../lib-config.xml"/>
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</sect3>
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</sect2>
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<sect2>
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<title>Contents</title>
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<para>The libjpeg package contains <command>cjpeg</command>,
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<command>djpeg</command>, <command>jpegtran</command>,
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<command>rdjpgcom</command>, <command>wrjpgcom</command> and
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<filename>libjpeg</filename> libraries.</para>
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</sect2>
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<sect2><title>Description</title>
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<sect3><title>cjpeg</title>
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<para><command>cjpeg</command> compresses image files to produce a
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<acronym>JPEG</acronym>/<acronym>JFIF</acronym> file on the standard
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output. Currently supported input file formats are:
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<acronym>PPM</acronym> (PBMPLUS color
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format), <acronym>PGM</acronym> (PBMPLUS gray-scale
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format), <acronym>BMP</acronym>, and Targa.</para></sect3>
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<sect3><title>djpeg</title>
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<para><command>djpeg</command> decompresses image files from
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<acronym>JPEG/JFIF</acronym> format to either <acronym>PPM</acronym>
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(PBMPLUS color format), <acronym>PGM</acronym> (PBMPLUS gray-scale
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format), <acronym>BMP</acronym>, or Targa
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format.</para></sect3>
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<sect3><title>jpegtran</title>
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<para><command>jpegtran</command> is used for lossless transformation of
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<acronym>JPEG</acronym> files.</para></sect3>
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<sect3><title>rdjpgcom</title>
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<para><command>rdjpgcom</command> displays text comments from within a
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<acronym>JPEG</acronym> file.</para></sect3>
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<sect3><title>wrjpgcom</title>
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<para><command>wrjpgcom</command> inserts text comments into a
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<acronym>JPEG</acronym> file.</para></sect3>
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<sect3><title>jpeg libraries</title>
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<para>These libraries are used by many programs for reading and writing
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jpeg format files.</para></sect3>
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</sect2>
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</sect1>
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