source: general/graphlib/libpng.xml@ ea97e13f

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
   "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

<!ENTITY libpng-download-http "http://prdownloads.sourceforge.net/libpng/libpng-&libpng-version;.tar.bz2">
<!ENTITY libpng-download-ftp " ">
<!ENTITY libpng-md5 "00cea4539bea4bd34cbf8b82ff9589cd">
<!ENTITY libpng-size "376 KB">
<!ENTITY libpng-buildsize "5.75 MB">
<!ENTITY libpng-time "0.13 SBU">
]>

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

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

<para>The <application>libpng</application> package contains libraries used
by other programs for reading and writing <acronym>PNG</acronym> files.</para>

<sect3><title>Package information</title>
<itemizedlist spacing='compact'>
<listitem><para>Download (HTTP): <ulink
url="&libpng-download-http;"/></para></listitem>
<listitem><para>Download (FTP): <ulink
url="&libpng-download-ftp;"/></para></listitem>
<listitem><para>Download MD5 Sum: &libpng-md5;</para></listitem>
<listitem><para>Download size: &libpng-size;</para></listitem>
<listitem><para>Estimated disk space required:
&libpng-buildsize;</para></listitem>
<listitem><para>Estimated build time:
&libpng-time;</para></listitem></itemizedlist>
</sect3>

<sect3><title>Additional downloads</title>
<itemizedlist spacing='compact'>
<listitem><para>Required Patch to explicitly link 
<application>libpng</application> against system libraries: <ulink 
url="&patch-root;/libpng-&libpng-version;-link_to_proper_libs-1.patch"/></para>
</listitem>
</itemizedlist></sect3>

</sect2>

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

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

<screen><userinput><command>patch -Np1 -i ../libpng-&libpng-version;-link_to_proper_libs-1.patch &amp;&amp;
make prefix=/usr ZLIBINC=/usr/include \
    ZLIBLIB=/usr/lib -f scripts/makefile.linux</command></userinput></screen>

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

<screen><userinput role='root'><command>make prefix=/usr install -f scripts/makefile.linux</command></userinput></screen>

</sect2>

<sect2>
<title>Command explanations</title>

<para><parameter>ZLIBINC=/usr/include ZLIBLIB=/usr/lib</parameter>: This
forces <application>libpng</application> to look for the
<application>zlib</application> includes and libraries where they are 
installed.</para>

<para><parameter>-f scripts/makefile.linux</parameter>: This points 
<command>make</command> at the <application>Linux</application> version of the 
<filename>Makefile</filename> as <application>libpng</application> doesn't use 
an <application>autoconf</application> routine. Instead, it has various 
<filename>Makefile</filename>s for different platforms.</para>

</sect2>

<sect2>
<title>Configuring <application>libpng</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 Libraries</segtitle>
<segtitle>Installed Directory</segtitle>

<seglistitem>
<seg>libpng-config and libpng12-config</seg>
<seg>libpng.[so,a] and libpng12.[so,a]</seg>
<seg>/usr/include/libpng12</seg>
</seglistitem>
</segmentedlist>

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

<varlistentry id="libpng-config">
<term><command>libpng-config</command></term>
<listitem><para>is a symlink to <command>libpng12-config</command>.</para>
<indexterm zone="libpng libpng-config">
<primary sortas="g-libpng-config">libpng-config</primary>
</indexterm></listitem>
</varlistentry>

<varlistentry id="libpng12-config">
<term><command>libpng12-config</command></term>
<listitem><para>provides configuration information for 
<application>libpng</application>.</para>
<indexterm zone="libpng libpng12-config">
<primary sortas="b-libpng12-config">libpng12-config</primary>
</indexterm></listitem>
</varlistentry>

<varlistentry id="libpng12">
<term><filename class='libraryfile'>libpng.[so,a] and 
libpng12.[so,a]</filename></term>
<listitem><para>libraries are a collection of routines used to create and 
manipulate <acronym>PNG</acronym> format graphics files. The
<acronym>PNG</acronym> format was designed as a replacement for 
<acronym>GIF</acronym> and, to a lesser extent, <acronym>TIFF</acronym>, with 
many improvements and extensions and lack of patent problems.</para>
<indexterm zone="libpng libpng12">
<primary sortas="c-libpng">libpng.[so,a]</primary>
</indexterm></listitem>
</varlistentry>
</variablelist>

</sect2>

</sect1>