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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>What does HarfBuzz do?: HarfBuzz Manual</title> <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> <link rel="home" href="index.html" title="HarfBuzz Manual"> <link rel="up" href="what-is-harfbuzz.html" title="What is HarfBuzz?"> <link rel="prev" href="why-do-i-need-a-shaping-engine.html" title="Why do I need a shaping engine?"> <link rel="next" href="what-harfbuzz-doesnt-do.html" title="What HarfBuzz doesn't do"> <meta name="generator" content="GTK-Doc V1.32 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> <td width="100%" align="left" class="shortcuts"></td> <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> <td><a accesskey="u" href="what-is-harfbuzz.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="why-do-i-need-a-shaping-engine.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="what-harfbuzz-doesnt-do.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="section"> <div class="titlepage"><div><div><h2 class="title" style="clear: both"> <a name="id-1.2.2.6"></a>What does HarfBuzz do?</h2></div></div></div> <p> HarfBuzz provides text shaping through a cross-platform C API that accepts sequences of Unicode codepoints as input. Currently, the following OpenType shaping models are supported: </p> <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> <li class="listitem"><p> Indic (covering Devanagari, Bengali, Gujarati, Gurmukhi, Kannada, Malayalam, Oriya, Tamil, Telugu, and Sinhala) </p></li> <li class="listitem"><p> Arabic (covering Arabic, N'Ko, Syriac, and Mongolian) </p></li> <li class="listitem"><p> Thai and Lao </p></li> <li class="listitem"><p> Khmer </p></li> <li class="listitem"><p> Myanmar </p></li> <li class="listitem"><p> Tibetan </p></li> <li class="listitem"><p> Hangul </p></li> <li class="listitem"><p> Hebrew </p></li> <li class="listitem"><p> The Universal Shaping Engine or <span class="emphasis"><em>USE</em></span> (covering complex scripts not covered by the above shaping models) </p></li> <li class="listitem"><p> A default shaping model for non-complex scripts (covering Latin, Cyrillic, Greek, Armenian, Georgian, Tifinagh, and many others) </p></li> <li class="listitem"><p> Emoji (including emoji modifier sequences, flag sequences, and ZWJ sequences) </p></li> </ul></div> <p> In addition to OpenType shaping, HarfBuzz supports the latest version of Graphite shaping (the "Graphite 2" model) and AAT shaping. </p> <p> HarfBuzz can read and understand TrueType fonts (.ttf), TrueType collections (.ttc), and OpenType fonts (.otf, including those fonts that contain TrueType-style outlines and those that contain PostScript CFF or CFF2 outlines). </p> <p> HarfBuzz is designed and tested to run on top of the FreeType font renderer. It can run on Linux, Android, Windows, macOS, and iOS systems. </p> <p> In addition to its core shaping functionality, HarfBuzz provides functions for accessing other font features, including optional GSUB and GPOS OpenType features, as well as all color-font formats (<code class="literal">CBDT</code>, <code class="literal">sbix</code>, <code class="literal">COLR/CPAL</code>, and <code class="literal">SVG-OT</code>) and OpenType variable fonts. HarfBuzz also includes a font-subsetting feature. HarfBuzz can perform some low-level math-shaping operations, although it does not currently perform full shaping for mathematical typesetting. </p> <p> A suite of command-line utilities is also provided in the source-code tree, designed to help users test and debug HarfBuzz's features on real-world fonts and input. </p> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.32</div> </body> </html>