2 <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
3 "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
4 <!ENTITY % local.common.attrib "xmlns:xi CDATA #FIXED 'http://www.w3.org/2003/XInclude'">
5 <!ENTITY version SYSTEM "version.xml">
9 <title>HarfBuzz Manual</title>
11 <title>HarfBuzz</title>
12 <graphic fileref="HarfBuzz.png" format="PNG" align="center"/>
14 HarfBuzz is a text shaping library. Using the HarfBuzz library allows
15 programs to convert a sequence of Unicode input into
16 properly formatted and positioned glyph output—for any writing
21 The canonical source-code tree is available at
22 <ulink url="https://github.com/harfbuzz/harfbuzz">github.com/harfbuzz/harfbuzz</ulink>.
23 See <xref linkend="download" endterm="download.title"/> for
29 <part id="user-manual">
30 <title>User's manual</title>
31 <xi:include href="usermanual-what-is-harfbuzz.xml"/>
32 <xi:include href="usermanual-install-harfbuzz.xml"/>
33 <xi:include href="usermanual-getting-started.xml"/>
34 <xi:include href="usermanual-shaping-concepts.xml"/>
35 <xi:include href="usermanual-object-model.xml"/>
36 <xi:include href="usermanual-buffers-language-script-and-direction.xml"/>
37 <xi:include href="usermanual-fonts-and-faces.xml"/>
38 <xi:include href="usermanual-opentype-features.xml"/>
39 <xi:include href="usermanual-clusters.xml"/>
40 <xi:include href="usermanual-utilities.xml"/>
41 <xi:include href="usermanual-integration.xml"/>
44 <part id="reference-manual">
47 This document is for HarfBuzz &version;.
48 <!--The latest version of this documentation can be found on-line at
49 <ulink role="online-location" url="http://[SERVER]/libharfbuzz/index.html">http://[SERVER]/libharfbuzz/</ulink>.-->
53 <title>Reference manual</title>
54 <chapter id="core-api">
55 <title>Core API</title>
56 <xi:include href="xml/hb-blob.xml"/>
57 <xi:include href="xml/hb-buffer.xml"/>
58 <xi:include href="xml/hb-common.xml"/>
59 <xi:include href="xml/hb-deprecated.xml"/>
60 <xi:include href="xml/hb-face.xml"/>
61 <xi:include href="xml/hb-font.xml"/>
62 <xi:include href="xml/hb-map.xml"/>
63 <xi:include href="xml/hb-set.xml"/>
64 <xi:include href="xml/hb-shape-plan.xml"/>
65 <xi:include href="xml/hb-shape.xml"/>
66 <xi:include href="xml/hb-unicode.xml"/>
67 <xi:include href="xml/hb-version.xml"/>
70 <chapter id="opentype-api">
71 <title>OpenType API</title>
72 <xi:include href="xml/hb-ot-color.xml"/>
73 <xi:include href="xml/hb-ot-font.xml"/>
74 <xi:include href="xml/hb-ot-layout.xml"/>
75 <xi:include href="xml/hb-ot-math.xml"/>
76 <xi:include href="xml/hb-ot-meta.xml"/>
77 <xi:include href="xml/hb-ot-metrics.xml"/>
78 <xi:include href="xml/hb-ot-name.xml"/>
79 <xi:include href="xml/hb-ot-shape.xml"/>
80 <xi:include href="xml/hb-ot-var.xml"/>
83 <chapter id="apple-advanced-typography-api">
84 <title>Apple Advanced Typography API</title>
85 <xi:include href="xml/hb-aat-layout.xml"/>
88 <chapter id="integration-api">
89 <title>Integration API</title>
90 <xi:include href="xml/hb-coretext.xml"/>
91 <xi:include href="xml/hb-ft.xml"/>
92 <xi:include href="xml/hb-glib.xml"/>
93 <xi:include href="xml/hb-graphite2.xml"/>
94 <xi:include href="xml/hb-icu.xml"/>
95 <xi:include href="xml/hb-uniscribe.xml"/>
96 <xi:include href="xml/hb-gdi.xml"/>
97 <xi:include href="xml/hb-directwrite.xml"/>
100 <chapter id="style-api">
101 <title>Style API</title>
102 <xi:include href="xml/hb-style.xml"/>
105 <chapter id="subset-api">
106 <title>Subset API</title>
107 <xi:include href="xml/hb-subset.xml"/>
111 <!--chapter id="object-tree">
112 <title>Object Hierarchy</title>
113 <xi:include href="xml/tree_index.sgml"/>
116 <index id="api-index-full"><title>API Index</title><xi:include href="xml/api-index-full.xml"><xi:fallback /></xi:include></index>
117 <index id="deprecated-api-index" role="deprecated"><title>Index of deprecated API</title><xi:include href="xml/api-index-deprecated.xml"><xi:fallback /></xi:include></index>
119 <index id="api-index-3-4-0" role="3.4.0"><title>Index of new symbols in 3.4.0</title><xi:include href="xml/api-index-3.4.0.xml"><xi:fallback /></xi:include></index>
120 <index id="api-index-3-3-0" role="3.3.0"><title>Index of new symbols in 3.3.0</title><xi:include href="xml/api-index-3.3.0.xml"><xi:fallback /></xi:include></index>
121 <index id="api-index-3-1-0" role="3.1.0"><title>Index of new symbols in 3.1.0</title><xi:include href="xml/api-index-3.1.0.xml"><xi:fallback /></xi:include></index>
122 <index id="api-index-3-0-0" role="3.0.0"><title>Index of new symbols in 3.0.0</title><xi:include href="xml/api-index-3.0.0.xml"><xi:fallback /></xi:include></index>
123 <index id="api-index-2-9-1" role="2.9.1"><title>Index of new symbols in 2.9.1</title><xi:include href="xml/api-index-2.9.1.xml"><xi:fallback /></xi:include></index>
124 <index id="api-index-2-9-0" role="2.9.0"><title>Index of new symbols in 2.9.0</title><xi:include href="xml/api-index-2.9.0.xml"><xi:fallback /></xi:include></index>
125 <index id="api-index-2-8-2" role="2.8.2"><title>Index of new symbols in 2.8.2</title><xi:include href="xml/api-index-2.8.2.xml"><xi:fallback /></xi:include></index>
126 <index id="api-index-2-7-3" role="2.7.3"><title>Index of new symbols in 2.7.3</title><xi:include href="xml/api-index-2.7.3.xml"><xi:fallback /></xi:include></index>
127 <index id="api-index-2-6-8" role="2.6.8"><title>Index of new symbols in 2.6.8</title><xi:include href="xml/api-index-2.6.8.xml"><xi:fallback /></xi:include></index>
128 <index id="api-index-2-6-5" role="2.6.5"><title>Index of new symbols in 2.6.5</title><xi:include href="xml/api-index-2.6.5.xml"><xi:fallback /></xi:include></index>
129 <index id="api-index-2-6-3" role="2.6.3"><title>Index of new symbols in 2.6.3</title><xi:include href="xml/api-index-2.6.3.xml"><xi:fallback /></xi:include></index>
130 <index id="api-index-2-6-0" role="2.6.0"><title>Index of new symbols in 2.6.0</title><xi:include href="xml/api-index-2.6.0.xml"><xi:fallback /></xi:include></index>
131 <index id="api-index-2-5-0" role="2.5.0"><title>Index of new symbols in 2.5.0</title><xi:include href="xml/api-index-2.5.0.xml"><xi:fallback /></xi:include></index>
132 <index id="api-index-2-4-0" role="2.4.0"><title>Index of new symbols in 2.4.0</title><xi:include href="xml/api-index-2.4.0.xml"><xi:fallback /></xi:include></index>
133 <index id="api-index-2-3-0" role="2.3.0"><title>Index of new symbols in 2.3.0</title><xi:include href="xml/api-index-2.3.0.xml"><xi:fallback /></xi:include></index>
134 <index id="api-index-2-2-0" role="2.2.0"><title>Index of new symbols in 2.2.0</title><xi:include href="xml/api-index-2.2.0.xml"><xi:fallback /></xi:include></index>
135 <index id="api-index-2-1-0" role="2.1.0"><title>Index of new symbols in 2.1.0</title><xi:include href="xml/api-index-2.1.0.xml"><xi:fallback /></xi:include></index>
136 <index id="api-index-2-0-0" role="2.0.0"><title>Index of new symbols in 2.0.0</title><xi:include href="xml/api-index-2.0.0.xml"><xi:fallback /></xi:include></index>
137 <index id="api-index-1-9-0" role="1.9.0"><title>Index of new symbols in 1.9.0</title><xi:include href="xml/api-index-1.9.0.xml"><xi:fallback /></xi:include></index>
138 <index id="api-index-1-8-6" role="1.8.6"><title>Index of new symbols in 1.8.6</title><xi:include href="xml/api-index-1.8.6.xml"><xi:fallback /></xi:include></index>
139 <index id="api-index-1-8-5" role="1.8.5"><title>Index of new symbols in 1.8.5</title><xi:include href="xml/api-index-1.8.5.xml"><xi:fallback /></xi:include></index>
140 <index id="api-index-1-8-1" role="1.8.1"><title>Index of new symbols in 1.8.1</title><xi:include href="xml/api-index-1.8.1.xml"><xi:fallback /></xi:include></index>
141 <index id="api-index-1-8-0" role="1.8.0"><title>Index of new symbols in 1.8.0</title><xi:include href="xml/api-index-1.8.0.xml"><xi:fallback /></xi:include></index>
142 <index id="api-index-1-7-7" role="1.7.7"><title>Index of new symbols in 1.7.7</title><xi:include href="xml/api-index-1.7.7.xml"><xi:fallback /></xi:include></index>
143 <index id="api-index-1-7-5" role="1.7.5"><title>Index of new symbols in 1.7.5</title><xi:include href="xml/api-index-1.7.5.xml"><xi:fallback /></xi:include></index>
144 <index id="api-index-1-7-2" role="1.7.2"><title>Index of new symbols in 1.7.2</title><xi:include href="xml/api-index-1.7.2.xml"><xi:fallback /></xi:include></index>
145 <index id="api-index-1-6-0" role="1.6.0"><title>Index of new symbols in 1.6.0</title><xi:include href="xml/api-index-1.6.0.xml"><xi:fallback /></xi:include></index>
146 <index id="api-index-1-5-0" role="1.5.0"><title>Index of new symbols in 1.5.0</title><xi:include href="xml/api-index-1.5.0.xml"><xi:fallback /></xi:include></index>
147 <index id="api-index-1-4-3" role="1.4.3"><title>Index of new symbols in 1.4.3</title><xi:include href="xml/api-index-1.4.3.xml"><xi:fallback /></xi:include></index>
148 <index id="api-index-1-4-2" role="1.4.2"><title>Index of new symbols in 1.4.2</title><xi:include href="xml/api-index-1.4.2.xml"><xi:fallback /></xi:include></index>
149 <index id="api-index-1-4-0" role="1.4.0"><title>Index of new symbols in 1.4.0</title><xi:include href="xml/api-index-1.4.0.xml"><xi:fallback /></xi:include></index>
150 <index id="api-index-1-3-3" role="1.3.3"><title>Index of new symbols in 1.3.3</title><xi:include href="xml/api-index-1.3.3.xml"><xi:fallback /></xi:include></index>
151 <index id="api-index-1-2-3" role="1.2.3"><title>Index of new symbols in 1.2.3</title><xi:include href="xml/api-index-1.2.3.xml"><xi:fallback /></xi:include></index>
152 <index id="api-index-1-1-3" role="1.1.3"><title>Index of new symbols in 1.1.3</title><xi:include href="xml/api-index-1.1.3.xml"><xi:fallback /></xi:include></index>
153 <index id="api-index-1-1-2" role="1.1.2"><title>Index of new symbols in 1.1.2</title><xi:include href="xml/api-index-1.1.2.xml"><xi:fallback /></xi:include></index>
154 <index id="api-index-1-0-5" role="1.0.5"><title>Index of new symbols in 1.0.5</title><xi:include href="xml/api-index-1.0.5.xml"><xi:fallback /></xi:include></index>
155 <index id="api-index-0-9-42" role="0.9.42"><title>Index of new symbols in 0.9.42</title><xi:include href="xml/api-index-0.9.42.xml"><xi:fallback /></xi:include></index>
156 <index id="api-index-0-9-41" role="0.9.41"><title>Index of new symbols in 0.9.41</title><xi:include href="xml/api-index-0.9.41.xml"><xi:fallback /></xi:include></index>
157 <index id="api-index-0-9-39" role="0.9.39"><title>Index of new symbols in 0.9.39</title><xi:include href="xml/api-index-0.9.39.xml"><xi:fallback /></xi:include></index>
158 <index id="api-index-0-9-38" role="0.9.38"><title>Index of new symbols in 0.9.38</title><xi:include href="xml/api-index-0.9.38.xml"><xi:fallback /></xi:include></index>
159 <index id="api-index-0-9-33" role="0.9.33"><title>Index of new symbols in 0.9.33</title><xi:include href="xml/api-index-0.9.33.xml"><xi:fallback /></xi:include></index>
160 <index id="api-index-0-9-31" role="0.9.31"><title>Index of new symbols in 0.9.31</title><xi:include href="xml/api-index-0.9.31.xml"><xi:fallback /></xi:include></index>
161 <index id="api-index-0-9-30" role="0.9.30"><title>Index of new symbols in 0.9.30</title><xi:include href="xml/api-index-0.9.30.xml"><xi:fallback /></xi:include></index>
162 <index id="api-index-0-9-28" role="0.9.28"><title>Index of new symbols in 0.9.28</title><xi:include href="xml/api-index-0.9.28.xml"><xi:fallback /></xi:include></index>
163 <index id="api-index-0-9-26" role="0.9.26"><title>Index of new symbols in 0.9.26</title><xi:include href="xml/api-index-0.9.26.xml"><xi:fallback /></xi:include></index>
164 <index id="api-index-0-9-22" role="0.9.22"><title>Index of new symbols in 0.9.22</title><xi:include href="xml/api-index-0.9.22.xml"><xi:fallback /></xi:include></index>
165 <index id="api-index-0-9-21" role="0.9.21"><title>Index of new symbols in 0.9.21</title><xi:include href="xml/api-index-0.9.21.xml"><xi:fallback /></xi:include></index>
166 <index id="api-index-0-9-20" role="0.9.20"><title>Index of new symbols in 0.9.20</title><xi:include href="xml/api-index-0.9.20.xml"><xi:fallback /></xi:include></index>
167 <index id="api-index-0-9-11" role="0.9.11"><title>Index of new symbols in 0.9.11</title><xi:include href="xml/api-index-0.9.11.xml"><xi:fallback /></xi:include></index>
168 <index id="api-index-0-9-10" role="0.9.10"><title>Index of new symbols in 0.9.10</title><xi:include href="xml/api-index-0.9.10.xml"><xi:fallback /></xi:include></index>
169 <index id="api-index-0-9-8" role="0.9.8"><title>Index of new symbols in 0.9.8</title><xi:include href="xml/api-index-0.9.8.xml"><xi:fallback /></xi:include></index>
170 <index id="api-index-0-9-7" role="0.9.7"><title>Index of new symbols in 0.9.7</title><xi:include href="xml/api-index-0.9.7.xml"><xi:fallback /></xi:include></index>
171 <index id="api-index-0-9-5" role="0.9.5"><title>Index of new symbols in 0.9.5</title><xi:include href="xml/api-index-0.9.5.xml"><xi:fallback /></xi:include></index>
172 <index id="api-index-0-9-2" role="0.9.2"><title>Index of new symbols in 0.9.2</title><xi:include href="xml/api-index-0.9.2.xml"><xi:fallback /></xi:include></index>
173 <index id="api-index-0-6-0" role="0.6.0"><title>Index of new symbols in 0.6.0</title><xi:include href="xml/api-index-0.6.0.xml"><xi:fallback /></xi:include></index>
175 <xi:include href="xml/annotation-glossary.xml"><xi:fallback /></xi:include>
180 The current HarfBuzz codebase is versioned 2.x.x and is stable
181 and under active maintenance. This is what is used in latest
182 versions of Firefox, GNOME, ChromeOS, Chrome, LibreOffice,
183 XeTeX, Android, and KDE, among other places.
186 Prior to 2012, the original HarfBuzz codebase (which, these days, is
187 referred to as <emphasis>harfbuzz-old</emphasis>) was derived from code
188 in <ulink url="http://freetype.org/">FreeType</ulink>,
189 <ulink url="http://pango.org/">Pango</ulink>, and
190 <ulink url="http://qt-project.org/">Qt</ulink>.
191 It is <emphasis>not</emphasis> actively developed or maintained, and is
192 extremely buggy. All users of harfbuzz-old are encouraged to switch over
193 to the new HarfBuzz as soon as possible.
196 To make this distinction clearer in discussions, the current HarfBuzz
197 codebase is sometimes referred to as <emphasis>harfbuzz-ng</emphasis>.
200 For reference purposes, the harfbuzz-old source tree is archived
201 <ulink url="http://cgit.freedesktop.org/harfbuzz.old/">here</ulink>.
202 There are no release tarballs of harfbuzz-old whatsoever.