1 | <?xml version="1.0" encoding="UTF-8"?>
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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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4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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5 | %general-entities;
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6 |
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7 | <!ENTITY libwebp-download-http "https://storage.googleapis.com/downloads.webmproject.org/releases/webp/libwebp-&libwebp-version;.tar.gz">
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8 | <!ENTITY libwebp-download-ftp " ">
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9 | <!ENTITY libwebp-md5sum "07daaa13bef03b7be07f11977b159cb8">
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10 | <!ENTITY libwebp-size "4.0 MB">
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11 | <!ENTITY libwebp-buildsize "45 MB">
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12 | <!ENTITY libwebp-time "0.1 SBU (with parallelism=4)">
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13 | ]>
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14 |
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15 | <sect1 id="libwebp" xreflabel="libwebp-&libwebp-version;">
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16 | <?dbhtml filename="libwebp.html"?>
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17 |
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18 |
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19 | <title>libwebp-&libwebp-version;</title>
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20 |
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21 | <indexterm zone="libwebp">
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22 | <primary sortas="a-libwebp">libwebp</primary>
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23 | </indexterm>
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24 |
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25 | <sect2 role="package">
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26 | <title>Introduction to libwebp</title>
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27 |
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28 | <para>
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29 | The <application>libwebp</application> package contains a library
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30 | and support programs to encode and decode images in WebP format.
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31 | </para>
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32 |
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33 | &lfs122_checked;
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34 |
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35 | <bridgehead renderas="sect3">Package Information</bridgehead>
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36 | <itemizedlist spacing="compact">
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37 | <listitem>
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38 | <para>
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39 | Download (HTTP): <ulink url="&libwebp-download-http;"/>
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40 | </para>
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41 | </listitem>
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42 | <listitem>
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43 | <para>
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44 | Download (FTP): <ulink url="&libwebp-download-ftp;"/>
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45 | </para>
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46 | </listitem>
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47 | <listitem>
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48 | <para>
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49 | Download MD5 sum: &libwebp-md5sum;
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50 | </para>
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51 | </listitem>
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52 | <listitem>
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53 | <para>
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54 | Download size: &libwebp-size;
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55 | </para>
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56 | </listitem>
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57 | <listitem>
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58 | <para>
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59 | Estimated disk space required: &libwebp-buildsize;
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60 | </para>
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61 | </listitem>
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62 | <listitem>
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63 | <para>
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64 | Estimated build time: &libwebp-time;
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65 | </para>
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66 | </listitem>
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67 | </itemizedlist>
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68 | <!-- applied in 1.3.2
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69 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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70 | <itemizedlist spacing="compact">
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71 | <listitem>
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72 | <para>
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73 | Required patch:
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74 | <ulink url="&patch-root;/libwebp-&libwebp-version;-security_update-2.patch"/>
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75 | </para>
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76 | </listitem>
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77 | </itemizedlist>
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78 | -->
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79 | <bridgehead renderas="sect3">libwebp Dependencies</bridgehead>
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80 |
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81 | <bridgehead renderas="sect4">Recommended</bridgehead>
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82 | <para role="recommended">
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83 | <xref linkend="libjpeg"/>,
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84 | <xref linkend="libpng"/>,
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85 | <xref linkend="libtiff"/>, and
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86 | <xref linkend="sdl"/> (for improved 3D Acceleration)
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87 | </para>
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88 |
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89 | <bridgehead renderas="sect4">Optional</bridgehead>
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90 | <para role="optional">
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91 | <xref linkend="freeglut"/> and
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92 | <xref linkend="giflib"/>
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93 | </para>
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94 |
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95 | </sect2>
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96 |
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97 | <sect2 role="installation">
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98 | <title>Installation of libwebp</title>
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99 | <!-- applied in 1.3.2
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100 | <para>
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101 | Fix a security issue identified upstream:
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102 | </para>
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103 |
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104 | <screen><userinput>patch -Np1 -i ../libwebp-&libwebp-version;-security_update-2.patch</userinput></screen>
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105 | -->
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106 | <para>
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107 | Install <application>libwebp</application> by running the following
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108 | commands:
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109 | </para>
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110 |
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111 | <screen><userinput>./configure --prefix=/usr \
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112 | --enable-libwebpmux \
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113 | --enable-libwebpdemux \
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114 | --enable-libwebpdecoder \
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115 | --enable-libwebpextras \
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116 | --enable-swap-16bit-csp \
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117 | --disable-static &&
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118 | make</userinput></screen>
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119 |
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120 | <para>
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121 | This package does not come with a test suite.
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122 | </para>
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123 |
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124 | <para>
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125 | Now, as the <systemitem class="username">root</systemitem> user:
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126 | </para>
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127 |
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128 | <screen role="root"><userinput>make install</userinput></screen>
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129 |
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130 | </sect2>
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131 |
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132 | <sect2 role="commands">
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133 | <title>Command Explanations</title>
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134 |
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135 |
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136 | <para>
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137 | <parameter>--enable-swap-16bit-csp</parameter>: This switch enables byte
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138 | swap for 16 bit colorspaces.
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139 | </para>
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140 |
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141 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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142 | href="../../xincludes/static-libraries.xml"/>
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143 |
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144 | </sect2>
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145 |
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146 | <sect2 role="content">
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147 | <title>Contents</title>
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148 |
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149 | <segmentedlist>
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150 | <segtitle>Installed Programs</segtitle>
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151 | <segtitle>Installed Library</segtitle>
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152 | <segtitle>Installed Directory</segtitle>
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153 |
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154 | <seglistitem>
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155 | <seg>
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156 | cwebp,
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157 | dwebp,
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158 | gif2webp,
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159 | img2webp,
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160 | vwebp,
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161 | webpinfo,
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162 | and webpmux
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163 | </seg>
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164 | <seg>
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165 | libsharpyuv.so,
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166 | libwebpdecoder.so,
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167 | libwebpdemux.so,
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168 | libwebpmux.so,
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169 | and libwebp.so
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170 | </seg>
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171 | <seg>
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172 | /usr/include/webp
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173 | </seg>
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174 | </seglistitem>
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175 | </segmentedlist>
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176 |
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177 | <variablelist>
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178 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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179 | <?dbfo list-presentation="list"?>
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180 | <?dbhtml list-presentation="table"?>
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181 |
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182 | <varlistentry id="cwebp">
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183 | <term><command>cwebp</command></term>
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184 | <listitem>
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185 | <para>
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186 | compresses an image using the WebP format
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187 | </para>
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188 | <indexterm zone="libwebp cwebp">
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189 | <primary sortas="b-cwebp">cwebp</primary>
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190 | </indexterm>
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191 | </listitem>
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192 | </varlistentry>
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193 |
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194 | <varlistentry id="dwebp">
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195 | <term><command>dwebp</command></term>
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196 | <listitem>
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197 | <para>
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198 | decompresses WebP files into PNG, PAM, PPM or PGM images
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199 | </para>
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200 | <indexterm zone="libwebp dwebp">
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201 | <primary sortas="b-dwebp">dwebp</primary>
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202 | </indexterm>
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203 | </listitem>
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204 | </varlistentry>
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205 |
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206 | <varlistentry id="gif2webp">
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207 | <term><command>gif2webp</command></term>
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208 | <listitem>
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209 | <para>
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210 | converts a GIF image to a WebP image
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211 | </para>
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212 | <indexterm zone="libwebp gif2webp">
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213 | <primary sortas="b-gif2webp">gif2webp</primary>
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214 | </indexterm>
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215 | </listitem>
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216 | </varlistentry>
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217 |
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218 | <varlistentry id="img2webp">
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219 | <term><command>img2webp</command></term>
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220 | <listitem>
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221 | <para>
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222 | creates an animated WebP file from a sequence of input images
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223 | </para>
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224 | <indexterm zone="libwebp img2webp">
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225 | <primary sortas="b-img2webp">img2webp</primary>
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226 | </indexterm>
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227 | </listitem>
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228 | </varlistentry>
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229 |
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230 | <varlistentry id="vwebp">
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231 | <term><command>vwebp</command></term>
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232 | <listitem>
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233 | <para>
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234 | decompresses a WebP file and displays it in a window
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235 | </para>
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236 | <indexterm zone="libwebp vwebp">
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237 | <primary sortas="b-vwebp">vwebp</primary>
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238 | </indexterm>
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239 | </listitem>
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240 | </varlistentry>
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241 |
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242 | <varlistentry id="webpinfo">
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243 | <term><command>webpinfo</command></term>
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244 | <listitem>
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245 | <para>
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246 | prints out the cunk level structure of WebP files along with
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247 | performing basic integrity checks
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248 | </para>
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249 | <indexterm zone="libwebp webpinfo">
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250 | <primary sortas="b-webpinfo">webpinfo</primary>
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251 | </indexterm>
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252 | </listitem>
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253 | </varlistentry>
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254 |
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255 | <varlistentry id="webpmux">
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256 | <term><command>webpmux</command></term>
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257 | <listitem>
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258 | <para>
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259 | creates animated WebP files from non-animated WebP images, extracts
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260 | frames from animated WebP images, and manages XMP/EXIF metadata and
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261 | the ICC profile
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262 | </para>
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263 | <indexterm zone="libwebp webpmux">
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264 | <primary sortas="b-webpmux">webpmux</primary>
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265 | </indexterm>
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266 | </listitem>
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267 | </varlistentry>
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268 |
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269 | <varlistentry id="libwebp-lib">
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270 | <term><filename class="libraryfile">libwebp.so</filename></term>
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271 | <listitem>
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272 | <para>
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273 | contains the API functions for WebP encoding and decoding
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274 | </para>
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275 | <indexterm zone="libwebp libwebp-lib">
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276 | <primary sortas="c-libwebp">libwebp.so</primary>
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277 | </indexterm>
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278 | </listitem>
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279 | </varlistentry>
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280 |
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281 | </variablelist>
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282 |
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283 | </sect2>
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284 |
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285 | </sect1>
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