docs/html/aat-shaping.html

   1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
   2 <html>
   3 <head>
   4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
   5 <title>AAT shaping: HarfBuzz Manual</title>
   6 <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
   7 <link rel="home" href="index.html" title="HarfBuzz Manual">
   8 <link rel="up" href="shaping-concepts.html" title="Shaping concepts">
   9 <link rel="prev" href="graphite-shaping.html" title="Graphite shaping">
  10 <link rel="next" href="object-model.html" title="The HarfBuzz object model">
  11 <meta name="generator" content="GTK-Doc V1.32.1 (XML mode)">
  12 <link rel="stylesheet" href="style.css" type="text/css">
  13 </head>
  14 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
  15 <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
  16 <td width="100%" align="left" class="shortcuts"></td>
  17 <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
  18 <td><a accesskey="u" href="shaping-concepts.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
  19 <td><a accesskey="p" href="graphite-shaping.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
  20 <td><a accesskey="n" href="object-model.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
  21 </tr></table>
  22 <div class="section">
  23 <div class="titlepage"><div><div><h2 class="title" style="clear: both">
  24 <a name="aat-shaping"></a>AAT shaping</h2></div></div></div>
  25 <p>
  26       In contrast to OpenType shaping, AAT shaping does not specify a
  27       predefined set of shaping models or a set of supported scripts.
  28     </p>
  29 <p>
  30       Instead, each AAT font includes a complete set of rules that
  31       implement the desired shaping model for the intended
  32       script. These rules include finite-state machines to match glyph
  33       sequences and the shaping operations to perform.
  34     </p>
  35 <p>
  36       Notably, AAT shaping rules are expressed for glyphs in the font,
  37       not for Unicode codepoints. AAT shaping can perform the same
  38       shaping operations used in OpenType shaping, as well as other
  39       functions that have not been defined for OpenType shaping.
  40     </p>
  41 </div>
  42 <div class="footer">
  43 <hr>Generated by GTK-Doc V1.32.1</div>
  44 </body>
  45 </html>