[52d29f7] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[6732c094] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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[52d29f7] | 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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[9a36df5f] | 7 | <!ENTITY libpng-download-http "&sourceforge-repo;/libpng/libpng-&libpng-version;.tar.xz">
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[8042630] | 8 | <!ENTITY libpng-download-ftp " ">
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[a3f014c] | 9 | <!ENTITY libpng-md5sum "1b34eab440263e32cfa39d19413fad54">
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| 10 | <!ENTITY libpng-size "972 KB">
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[595e58e] | 11 | <!ENTITY libpng-buildsize "14 MB (with tests)">
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[8e924f51] | 12 | <!ENTITY libpng-time "0.8 SBU (with tests)">
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[31ab0f7] | 13 |
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[b1d3c72a] | 14 | <!ENTITY apng-version "&libpng-version;">
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[4890200] | 15 |
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[8e22d1a] | 16 | <!ENTITY apng-patch
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[d42f02c6] | 17 | "&sourceforge-repo;/project/apng/libpng/libpng16/libpng-&apng-version;-apng.patch.gz">
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[52d29f7] | 18 | ]>
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| 19 |
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[f45b1953] | 20 | <sect1 id="libpng" xreflabel="libpng-&libpng-version;">
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[6b71f17] | 21 | <?dbhtml filename="libpng.html"?>
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| 22 |
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| 23 | <sect1info>
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| 24 | <othername>$LastChangedBy$</othername>
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| 25 | <date>$Date$</date>
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| 26 | </sect1info>
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| 27 |
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[8042630] | 28 | <title>libpng-&libpng-version;</title>
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[6b71f17] | 29 |
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| 30 | <indexterm zone="libpng">
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[a98acfe7] | 31 | <primary sortas="a-libpng">libpng</primary>
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[6b71f17] | 32 | </indexterm>
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| 33 |
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[13d6079] | 34 | <sect2 role="package">
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[8042630] | 35 | <title>Introduction to libpng</title>
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[6b71f17] | 36 |
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[de05930] | 37 | <para>
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[31ab0f7] | 38 | The <application>libpng</application> package contains libraries used
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| 39 | by other programs for reading and writing PNG files. The PNG format
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| 40 | was designed as a replacement for GIF and, to a lesser extent, TIFF,
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| 41 | with many improvements and extensions and lack of patent problems.
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[de05930] | 42 | </para>
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[6b71f17] | 43 |
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[8b0eef4] | 44 | &lfs80_checked;
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[a3f014c] | 45 | &gcc7_checked;
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[a263ccb3] | 46 |
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[6b71f17] | 47 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 48 | <itemizedlist spacing="compact">
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| 49 | <listitem>
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[b33c421] | 50 | <para>
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| 51 | Download (HTTP): <ulink url="&libpng-download-http;"/>
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| 52 | </para>
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[6b71f17] | 53 | </listitem>
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| 54 | <listitem>
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[b33c421] | 55 | <para>
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| 56 | Download (FTP): <ulink url="&libpng-download-ftp;"/>
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| 57 | </para>
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[6b71f17] | 58 | </listitem>
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| 59 | <listitem>
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[b33c421] | 60 | <para>
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| 61 | Download MD5 sum: &libpng-md5sum;
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| 62 | </para>
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[6b71f17] | 63 | </listitem>
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| 64 | <listitem>
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[b33c421] | 65 | <para>
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| 66 | Download size: &libpng-size;
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| 67 | </para>
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[6b71f17] | 68 | </listitem>
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| 69 | <listitem>
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[b33c421] | 70 | <para>
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| 71 | Estimated disk space required: &libpng-buildsize;
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| 72 | </para>
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[6b71f17] | 73 | </listitem>
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| 74 | <listitem>
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[b33c421] | 75 | <para>
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| 76 | Estimated build time: &libpng-time;
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| 77 | </para>
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[6b71f17] | 78 | </listitem>
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| 79 | </itemizedlist>
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| 80 |
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[57fc33d3] | 81 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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[b690f72] | 82 | <itemizedlist spacing="compact">
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[6b71f17] | 83 | <listitem>
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[de05930] | 84 | <para>
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[69c0160] | 85 | Recommended patch to include animated png functionality in
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[a38269c] | 86 | <application>libpng</application> (required to use the system
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[de05930] | 87 | <application>libpng</application> in
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[1d1e909] | 88 | <application>Firefox</application>,
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| 89 | <application>Seamonkey</application>, and
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[20f09631] | 90 | <application>Thunderbird</application>): <ulink url="&apng-patch;"/>
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[de05930] | 91 | </para>
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[6b71f17] | 92 | </listitem>
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[57fc33d3] | 93 | </itemizedlist>
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[6b71f17] | 94 |
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[de05930] | 95 | <para condition="html" role="usernotes">
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| 96 | User Notes: <ulink url="&blfs-wiki;/libpng"/>
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| 97 | </para>
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[6b71f17] | 98 | </sect2>
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| 99 |
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| 100 | <sect2 role="installation">
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[8042630] | 101 | <title>Installation of libpng</title>
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[6b71f17] | 102 |
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[de05930] | 103 | <para>
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[fca0f4cc] | 104 | If you want to patch libpng to support apng files, apply it here:
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[de05930] | 105 | </para>
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[d0c5ea3] | 106 |
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[822cc4a6] | 107 | <screen><userinput>gzip -cd ../libpng-&apng-version;-apng.patch.gz | patch -p0</userinput></screen>
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[d0c5ea3] | 108 |
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[de05930] | 109 | <para>
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| 110 | Install <application>libpng</application> by running the following
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| 111 | commands:
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| 112 | </para>
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[6b71f17] | 113 |
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[618abcf2] | 114 | <screen><userinput>LIBS=-lpthread ./configure --prefix=/usr --disable-static &&
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[8042630] | 115 | make</userinput></screen>
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| 116 |
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[b33c421] | 117 | <para>
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| 118 | To test the results, issue: <command>make check</command>.
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| 119 | </para>
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[6b71f17] | 120 |
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[de05930] | 121 | <para>
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| 122 | Now, as the <systemitem class="username">root</systemitem> user:
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| 123 | </para>
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[6b71f17] | 124 |
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[8042630] | 125 | <screen role="root"><userinput>make install &&
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[a98acfe7] | 126 | mkdir -v /usr/share/doc/libpng-&libpng-version; &&
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| 127 | cp -v README libpng-manual.txt /usr/share/doc/libpng-&libpng-version;</userinput></screen>
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[31ab0f7] | 128 |
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[6b71f17] | 129 | </sect2>
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| 130 |
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[5eda319] | 131 | <sect2 role="commands">
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| 132 | <title>Command Explanations</title>
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| 133 |
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[b88584a] | 134 | <para>
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[618abcf2] | 135 | <envar>LIBS=-lpthread</envar>: Ensure the libpthread library is
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[b88584a] | 136 | used to allow parallelism on systems with multiple cores.
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| 137 | </para>
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| 138 |
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[de05930] | 139 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 140 | href="../../xincludes/static-libraries.xml"/>
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[b33c421] | 141 |
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[5eda319] | 142 | </sect2>
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| 143 |
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[6b71f17] | 144 | <sect2 role="content">
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| 145 | <title>Contents</title>
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| 146 |
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| 147 | <segmentedlist>
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| 148 | <segtitle>Installed Programs</segtitle>
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| 149 | <segtitle>Installed Libraries</segtitle>
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[9de6f91] | 150 | <segtitle>Installed Directories</segtitle>
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[6b71f17] | 151 |
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| 152 | <seglistitem>
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[de05930] | 153 | <seg>
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[7fe0ce3b] | 154 | libpng-config (symlink), libpng16-config, pngfix and png-fix-itxt
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[de05930] | 155 | </seg>
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| 156 | <seg>
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[20f09631] | 157 | libpng.so
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[de05930] | 158 | </seg>
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| 159 | <seg>
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[31ab0f7] | 160 | /usr/include/libpng16 and
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[de05930] | 161 | /usr/share/doc/libpng-&libpng-version;
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| 162 | </seg>
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[6b71f17] | 163 | </seglistitem>
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| 164 | </segmentedlist>
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| 165 |
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| 166 | <variablelist>
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| 167 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 168 | <?dbfo list-presentation="list"?>
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| 169 | <?dbhtml list-presentation="table"?>
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| 170 |
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[1a021f3c] | 171 | <varlistentry id="pngfix">
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| 172 | <term><command>pngfix</command></term>
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| 173 | <listitem>
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| 174 | <para>
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| 175 | tests, optimizes and optionally fixes the zlib header in PNG files.
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[a407a1c] | 176 | Optionally, when fixing, strips ancillary chunks from the file.
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[1a021f3c] | 177 | </para>
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| 178 | <indexterm zone="libpng pngfix">
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| 179 | <primary sortas="b-pngfix">pngfix</primary>
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| 180 | </indexterm>
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| 181 | </listitem>
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| 182 | </varlistentry>
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| 183 |
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| 184 | <varlistentry id="png-fix-itxt">
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| 185 | <term><command>png-fix-itxt</command></term>
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| 186 | <listitem>
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| 187 | <para>
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| 188 | fixes PNG files that have an incorrect length field in the
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| 189 | iTXt chunks.
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| 190 | </para>
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| 191 | <indexterm zone="libpng png-fix-itxt">
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| 192 | <primary sortas="b-png-fix-itxt">png-fix-itxt</primary>
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| 193 | </indexterm>
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| 194 | </listitem>
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| 195 | </varlistentry>
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| 196 |
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[6b71f17] | 197 | <varlistentry id="libpng-config">
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| 198 | <term><command>libpng-config</command></term>
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| 199 | <listitem>
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[de05930] | 200 | <para>
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[31ab0f7] | 201 | is a shell script that provides configuration information
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| 202 | for applications wanting to use
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| 203 | <application>libpng</application>.
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[de05930] | 204 | </para>
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[31ab0f7] | 205 | <indexterm zone="libpng libpng-config">
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| 206 | <primary sortas="b-libpng-config">libpng-config</primary>
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[6b71f17] | 207 | </indexterm>
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| 208 | </listitem>
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| 209 | </varlistentry>
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| 210 |
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[31ab0f7] | 211 | <varlistentry id="libpng-lin">
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| 212 | <term><filename class="libraryfile">libpng.so</filename></term>
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[6b71f17] | 213 | <listitem>
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[de05930] | 214 | <para>
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[31ab0f7] | 215 | contain routines used to create and manipulate PNG
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| 216 | format graphics files.
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[de05930] | 217 | </para>
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[31ab0f7] | 218 | <indexterm zone="libpng libpng-lin">
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| 219 | <primary sortas="c-libpng">libpng.so</primary>
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[6b71f17] | 220 | </indexterm>
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| 221 | </listitem>
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| 222 | </varlistentry>
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[b33c421] | 223 |
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[6b71f17] | 224 | </variablelist>
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[b33c421] | 225 |
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[6b71f17] | 226 | </sect2>
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[b33c421] | 227 |
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[f45b1953] | 228 | </sect1>
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