source: general/graphlib/libwebp.xml@ 30c1c72

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Last change on this file since 30c1c72 was 2a72ab9, checked in by Ken Moffat <ken@…>, 9 months ago

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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6
7 <!ENTITY libwebp-download-http "http://downloads.webmproject.org/releases/webp/libwebp-&libwebp-version;.tar.gz">
8 <!ENTITY libwebp-download-ftp " ">
9 <!ENTITY libwebp-md5sum "0ff59e5598753f47519e3e61c12f8cfd">
10 <!ENTITY libwebp-size "4.0 MB">
11 <!ENTITY libwebp-buildsize "39 MB">
12 <!ENTITY libwebp-time "0.3 SBU">
13]>
14
15<sect1 id="libwebp" xreflabel="libwebp-&libwebp-version;">
16 <?dbhtml filename="libwebp.html"?>
17
18
19 <title>libwebp-&libwebp-version;</title>
20
21 <indexterm zone="libwebp">
22 <primary sortas="a-libwebp">libwebp</primary>
23 </indexterm>
24
25 <sect2 role="package">
26 <title>Introduction to libwebp</title>
27
28 <para>
29 The <application>libwebp</application> package contains a library
30 and support programs to encode and decode images in WebP format.
31 </para>
32
33 &lfs120_checked;
34
35 <bridgehead renderas="sect3">Package Information</bridgehead>
36 <itemizedlist spacing="compact">
37 <listitem>
38 <para>
39 Download (HTTP): <ulink url="&libwebp-download-http;"/>
40 </para>
41 </listitem>
42 <listitem>
43 <para>
44 Download (FTP): <ulink url="&libwebp-download-ftp;"/>
45 </para>
46 </listitem>
47 <listitem>
48 <para>
49 Download MD5 sum: &libwebp-md5sum;
50 </para>
51 </listitem>
52 <listitem>
53 <para>
54 Download size: &libwebp-size;
55 </para>
56 </listitem>
57 <listitem>
58 <para>
59 Estimated disk space required: &libwebp-buildsize;
60 </para>
61 </listitem>
62 <listitem>
63 <para>
64 Estimated build time: &libwebp-time;
65 </para>
66 </listitem>
67 </itemizedlist>
68<!--
69 <bridgehead renderas="sect3">Additional Downloads</bridgehead>
70 <itemizedlist spacing="compact">
71 <listitem>
72 <para>
73 Required patch:
74 <ulink url="&patch-root;/libwebp-&libwebp-version;-upstream_fix-1.patch"/>
75 </para>
76 </listitem>
77 </itemizedlist>
78-->
79 <bridgehead renderas="sect3">libwebp Dependencies</bridgehead>
80
81 <bridgehead renderas="sect4">Recommended</bridgehead>
82 <para role="recommended">
83 <xref linkend="libjpeg"/>,
84 <xref linkend="libpng"/>,
85 <xref linkend="libtiff"/>, and
86 <xref linkend="sdl"/> (for improved 3D Acceleration)
87 </para>
88
89 <bridgehead renderas="sect4">Optional</bridgehead>
90 <para role="optional">
91 <xref linkend="freeglut"/> and
92 <xref linkend="giflib"/>
93 </para>
94
95 </sect2>
96
97 <sect2 role="installation">
98 <title>Installation of libwebp</title>
99
100 <!-- https://bugs.chromium.org/p/webp/issues/detail?id=603
101 but not public yet
102 Fixed in version 1.3.1.
103 <para>
104 Fix a security issue identified upstream:
105 </para>
106
107<screen><userinput>patch -Np1 -i ../libwebp-&libwebp-version;-upstream_fix-1.patch</userinput></screen>
108-->
109 <para>
110 Install <application>libwebp</application> by running the following
111 commands:
112 </para>
113
114<screen><userinput>./configure --prefix=/usr \
115 --enable-libwebpmux \
116 --enable-libwebpdemux \
117 --enable-libwebpdecoder \
118 --enable-libwebpextras \
119 --enable-swap-16bit-csp \
120 --disable-static &amp;&amp;
121make</userinput></screen>
122
123 <para>
124 This package does not come with a test suite.
125 </para>
126
127 <para>
128 Now, as the <systemitem class="username">root</systemitem> user:
129 </para>
130
131<screen role="root"><userinput>make install</userinput></screen>
132
133 </sect2>
134
135 <sect2 role="commands">
136 <title>Command Explanations</title>
137
138
139 <para>
140 <parameter>--enable-swap-16bit-csp</parameter>: This switch enables byte
141 swap for 16 bit colorspaces.
142 </para>
143
144 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
145 href="../../xincludes/static-libraries.xml"/>
146
147 </sect2>
148
149 <sect2 role="content">
150 <title>Contents</title>
151
152 <segmentedlist>
153 <segtitle>Installed Programs</segtitle>
154 <segtitle>Installed Library</segtitle>
155 <segtitle>Installed Directory</segtitle>
156
157 <seglistitem>
158 <seg>
159 cwebp,
160 dwebp,
161 gif2webp,
162 img2webp,
163 vwebp,
164 webpinfo,
165 and webpmux
166 </seg>
167 <seg>
168 libsharpyuv.so,
169 libwebpdecoder.so,
170 libwebpdemux.so,
171 libwebpmux.so,
172 and libwebp.so
173 </seg>
174 <seg>
175 /usr/include/webp
176 </seg>
177 </seglistitem>
178 </segmentedlist>
179
180 <variablelist>
181 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
182 <?dbfo list-presentation="list"?>
183 <?dbhtml list-presentation="table"?>
184
185 <varlistentry id="cwebp">
186 <term><command>cwebp</command></term>
187 <listitem>
188 <para>
189 compresses an image using the WebP format
190 </para>
191 <indexterm zone="libwebp cwebp">
192 <primary sortas="b-cwebp">cwebp</primary>
193 </indexterm>
194 </listitem>
195 </varlistentry>
196
197 <varlistentry id="dwebp">
198 <term><command>dwebp</command></term>
199 <listitem>
200 <para>
201 decompresses WebP files into PNG, PAM, PPM or PGM images
202 </para>
203 <indexterm zone="libwebp dwebp">
204 <primary sortas="b-dwebp">dwebp</primary>
205 </indexterm>
206 </listitem>
207 </varlistentry>
208
209 <varlistentry id="gif2webp">
210 <term><command>gif2webp</command></term>
211 <listitem>
212 <para>
213 converts a GIF image to a WebP image
214 </para>
215 <indexterm zone="libwebp gif2webp">
216 <primary sortas="b-gif2webp">gif2webp</primary>
217 </indexterm>
218 </listitem>
219 </varlistentry>
220
221 <varlistentry id="img2webp">
222 <term><command>img2webp</command></term>
223 <listitem>
224 <para>
225 creates an animated WebP file from a sequence of input images
226 </para>
227 <indexterm zone="libwebp img2webp">
228 <primary sortas="b-img2webp">img2webp</primary>
229 </indexterm>
230 </listitem>
231 </varlistentry>
232
233 <varlistentry id="vwebp">
234 <term><command>vwebp</command></term>
235 <listitem>
236 <para>
237 decompresses a WebP file and displays it in a window
238 </para>
239 <indexterm zone="libwebp vwebp">
240 <primary sortas="b-vwebp">vwebp</primary>
241 </indexterm>
242 </listitem>
243 </varlistentry>
244
245 <varlistentry id="webpinfo">
246 <term><command>webpinfo</command></term>
247 <listitem>
248 <para>
249 prints out the cunk level structure of WebP files along with
250 performing basic integrity checks
251 </para>
252 <indexterm zone="libwebp webpinfo">
253 <primary sortas="b-webpinfo">webpinfo</primary>
254 </indexterm>
255 </listitem>
256 </varlistentry>
257
258 <varlistentry id="webpmux">
259 <term><command>webpmux</command></term>
260 <listitem>
261 <para>
262 creates animated WebP files from non-animated WebP images, extracts
263 frames from animated WebP images, and manages XMP/EXIF metadata and
264 the ICC profile
265 </para>
266 <indexterm zone="libwebp webpmux">
267 <primary sortas="b-webpmux">webpmux</primary>
268 </indexterm>
269 </listitem>
270 </varlistentry>
271
272 <varlistentry id="libwebp-lib">
273 <term><filename class="libraryfile">libwebp.so</filename></term>
274 <listitem>
275 <para>
276 contains the API functions for WebP encoding and decoding
277 </para>
278 <indexterm zone="libwebp libwebp-lib">
279 <primary sortas="c-libwebp">libwebp.so</primary>
280 </indexterm>
281 </listitem>
282 </varlistentry>
283
284 </variablelist>
285
286 </sect2>
287
288</sect1>
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