source: general/graphlib/libwebp.xml@ cb594b6c

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Last change on this file since cb594b6c was cb594b6c, checked in by Xi Ruoyao <xry111@…>, 12 months ago

general: Remove non-exist User Notes link

Part of User Notes removal by
​https://www.linuxfromscratch.org/~xry111/remove-nonexist-usernote.sh
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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 "994cf2efb664ef5140fa0b56b83fa721">
10 <!ENTITY libwebp-size "4.0 MB">
11 <!ENTITY libwebp-buildsize "43 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 &lfs113_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 <para>
103 Fix a security issue identified upstream:
104 </para>
105
106<screen><userinput>patch -Np1 -i ../libwebp-&libwebp-version;-upstream_fix-1.patch</userinput></screen>
107
108 <para>
109 Install <application>libwebp</application> by running the following
110 commands:
111 </para>
112
113<screen><userinput>./configure --prefix=/usr \
114 --enable-libwebpmux \
115 --enable-libwebpdemux \
116 --enable-libwebpdecoder \
117 --enable-libwebpextras \
118 --enable-swap-16bit-csp \
119 --disable-static &amp;&amp;
120make</userinput></screen>
121
122 <para>
123 This package does not come with a test suite.
124 </para>
125
126 <para>
127 Now, as the <systemitem class="username">root</systemitem> user:
128 </para>
129
130<screen role="root"><userinput>make install</userinput></screen>
131
132 </sect2>
133
134 <sect2 role="commands">
135 <title>Command Explanations</title>
136
137
138 <para>
139 <parameter>--enable-swap-16bit-csp</parameter>: This switch enables byte
140 swap for 16 bit colorspaces.
141 </para>
142
143 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
144 href="../../xincludes/static-libraries.xml"/>
145
146 </sect2>
147
148 <sect2 role="content">
149 <title>Contents</title>
150
151 <segmentedlist>
152 <segtitle>Installed Programs</segtitle>
153 <segtitle>Installed Library</segtitle>
154 <segtitle>Installed Directory</segtitle>
155
156 <seglistitem>
157 <seg>
158 cwebp,
159 dwebp,
160 gif2webp,
161 img2webp,
162 vwebp,
163 webpinfo,
164 and webpmux
165 </seg>
166 <seg>
167 libsharpyuv.so,
168 libwebpdecoder.so,
169 libwebpdemux.so,
170 libwebpmux.so,
171 and libwebp.so
172 </seg>
173 <seg>
174 /usr/include/webp
175 </seg>
176 </seglistitem>
177 </segmentedlist>
178
179 <variablelist>
180 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
181 <?dbfo list-presentation="list"?>
182 <?dbhtml list-presentation="table"?>
183
184 <varlistentry id="cwebp">
185 <term><command>cwebp</command></term>
186 <listitem>
187 <para>
188 compresses an image using the WebP format
189 </para>
190 <indexterm zone="libwebp cwebp">
191 <primary sortas="b-cwebp">cwebp</primary>
192 </indexterm>
193 </listitem>
194 </varlistentry>
195
196 <varlistentry id="dwebp">
197 <term><command>dwebp</command></term>
198 <listitem>
199 <para>
200 decompresses WebP files into PNG, PAM, PPM or PGM images
201 </para>
202 <indexterm zone="libwebp dwebp">
203 <primary sortas="b-dwebp">dwebp</primary>
204 </indexterm>
205 </listitem>
206 </varlistentry>
207
208 <varlistentry id="gif2webp">
209 <term><command>gif2webp</command></term>
210 <listitem>
211 <para>
212 converts a GIF image to a WebP image
213 </para>
214 <indexterm zone="libwebp gif2webp">
215 <primary sortas="b-gif2webp">gif2webp</primary>
216 </indexterm>
217 </listitem>
218 </varlistentry>
219
220 <varlistentry id="img2webp">
221 <term><command>img2webp</command></term>
222 <listitem>
223 <para>
224 creates an animated WebP file from a sequence of input images
225 </para>
226 <indexterm zone="libwebp img2webp">
227 <primary sortas="b-img2webp">img2webp</primary>
228 </indexterm>
229 </listitem>
230 </varlistentry>
231
232 <varlistentry id="vwebp">
233 <term><command>vwebp</command></term>
234 <listitem>
235 <para>
236 decompresses a WebP file and displays it in a window
237 </para>
238 <indexterm zone="libwebp vwebp">
239 <primary sortas="b-vwebp">vwebp</primary>
240 </indexterm>
241 </listitem>
242 </varlistentry>
243
244 <varlistentry id="webpinfo">
245 <term><command>webpinfo</command></term>
246 <listitem>
247 <para>
248 prints out the cunk level structure of WebP files along with
249 performing basic integrity checks
250 </para>
251 <indexterm zone="libwebp webpinfo">
252 <primary sortas="b-webpinfo">webpinfo</primary>
253 </indexterm>
254 </listitem>
255 </varlistentry>
256
257 <varlistentry id="webpmux">
258 <term><command>webpmux</command></term>
259 <listitem>
260 <para>
261 creates animated WebP files from non-animated WebP images, extracts
262 frames from animated WebP images, and manages XMP/EXIF metadata and
263 the ICC profile
264 </para>
265 <indexterm zone="libwebp webpmux">
266 <primary sortas="b-webpmux">webpmux</primary>
267 </indexterm>
268 </listitem>
269 </varlistentry>
270
271 <varlistentry id="libwebp-lib">
272 <term><filename class="libraryfile">libwebp.so</filename></term>
273 <listitem>
274 <para>
275 contains the API functions for WebP encoding and decoding
276 </para>
277 <indexterm zone="libwebp libwebp-lib">
278 <primary sortas="c-libwebp">libwebp.so</primary>
279 </indexterm>
280 </listitem>
281 </varlistentry>
282
283 </variablelist>
284
285 </sect2>
286
287</sect1>
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