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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>hb-coretext: HarfBuzz Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="index.html" title="HarfBuzz Manual">
<link rel="up" href="integration-api.html" title="Integration API">
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<meta name="generator" content="GTK-Doc V1.34.0 (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">
<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span>
<a href="#harfbuzz-hb-coretext.description" class="shortcut">Description</a></span>
</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="integration-api.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
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<td><a accesskey="n" href="harfbuzz-hb-directwrite.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="harfbuzz-hb-coretext"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="harfbuzz-hb-coretext.top_of_page"></a>hb-coretext</span></h2>
<p>hb-coretext — CoreText integration</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="harfbuzz-hb-coretext.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_proto_type">
<col class="functions_proto_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="returnvalue">hb_face_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="harfbuzz-hb-coretext.html#hb-coretext-face-create" title="hb_coretext_face_create ()">hb_coretext_face_create</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="returnvalue">hb_face_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="harfbuzz-hb-coretext.html#hb-coretext-face-create-from-file-or-fail" title="hb_coretext_face_create_from_file_or_fail ()">hb_coretext_face_create_from_file_or_fail</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="returnvalue">hb_face_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="harfbuzz-hb-coretext.html#hb-coretext-face-create-from-blob-or-fail" title="hb_coretext_face_create_from_blob_or_fail ()">hb_coretext_face_create_from_blob_or_fail</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="harfbuzz-hb-font.html#hb-font-t" title="hb_font_t"><span class="returnvalue">hb_font_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="harfbuzz-hb-coretext.html#hb-coretext-font-create" title="hb_coretext_font_create ()">hb_coretext_font_create</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">CGFontRef</span>
</td>
<td class="function_name">
<a class="link" href="harfbuzz-hb-coretext.html#hb-coretext-face-get-cg-font" title="hb_coretext_face_get_cg_font ()">hb_coretext_face_get_cg_font</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">CTFontRef</span>
</td>
<td class="function_name">
<a class="link" href="harfbuzz-hb-coretext.html#hb-coretext-font-get-ct-font" title="hb_coretext_font_get_ct_font ()">hb_coretext_font_get_ct_font</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="harfbuzz-hb-coretext.html#hb-coretext-font-set-funcs" title="hb_coretext_font_set_funcs ()">hb_coretext_font_set_funcs</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="harfbuzz-hb-coretext.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="other_proto_type">
<col class="other_proto_name">
</colgroup>
<tbody>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="harfbuzz-hb-coretext.html#HB-CORETEXT-TAG-KERX:CAPS" title="HB_CORETEXT_TAG_KERX">HB_CORETEXT_TAG_KERX</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="harfbuzz-hb-coretext.html#HB-CORETEXT-TAG-MORT:CAPS" title="HB_CORETEXT_TAG_MORT">HB_CORETEXT_TAG_MORT</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="harfbuzz-hb-coretext.html#HB-CORETEXT-TAG-MORX:CAPS" title="HB_CORETEXT_TAG_MORX">HB_CORETEXT_TAG_MORX</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="harfbuzz-hb-coretext.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <hb-coretext.h>
</pre>
</div>
<div class="refsect1">
<a name="harfbuzz-hb-coretext.description"></a><h2>Description</h2>
<p>Functions for using HarfBuzz with the CoreText fonts.</p>
</div>
<div class="refsect1">
<a name="harfbuzz-hb-coretext.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="hb-coretext-face-create"></a><h3>hb_coretext_face_create ()</h3>
<pre class="programlisting"><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="returnvalue">hb_face_t</span></a> *
hb_coretext_face_create (<em class="parameter"><code><span class="type">CGFontRef</span> cg_font</code></em>);</pre>
<p>Creates an <a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> face object from the specified
CGFontRef.</p>
<div class="refsect3">
<a name="hb-coretext-face-create.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>cg_font</p></td>
<td class="parameter_description"><p>The CGFontRef to work upon</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="hb-coretext-face-create.returns"></a><h4>Returns</h4>
<p>The new face object. </p>
<p><span class="annotation">[<acronym title="The caller owns the data, and is responsible for free it."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-0-9-10.html#api-index-0.9.10">0.9.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="hb-coretext-face-create-from-file-or-fail"></a><h3>hb_coretext_face_create_from_file_or_fail ()</h3>
<pre class="programlisting"><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="returnvalue">hb_face_t</span></a> *
hb_coretext_face_create_from_file_or_fail
(<em class="parameter"><code>const <span class="type">char</span> *file_name</code></em>,
<em class="parameter"><code>unsigned <span class="type">int</span> index</code></em>);</pre>
<p>Creates an <a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> face object from the specified
font file and face index.</p>
<p>This is similar in functionality to <a class="link" href="harfbuzz-hb-face.html#hb-face-create-from-file-or-fail" title="hb_face_create_from_file_or_fail ()"><code class="function">hb_face_create_from_file_or_fail()</code></a>,
but uses the CoreText library for loading the font file.</p>
<div class="refsect3">
<a name="hb-coretext-face-create-from-file-or-fail.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>file_name</p></td>
<td class="parameter_description"><p>A font filename</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>index</p></td>
<td class="parameter_description"><p>The index of the face within the file</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="hb-coretext-face-create-from-file-or-fail.returns"></a><h4>Returns</h4>
<p>The new face object, or <code class="literal">NULL</code> if
no face is found at the specified index or the file cannot be read. </p>
<p><span class="annotation">[<acronym title="The caller owns the data, and is responsible for free it."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-10-1-0.html#api-index-10.1.0">10.1.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="hb-coretext-face-create-from-blob-or-fail"></a><h3>hb_coretext_face_create_from_blob_or_fail ()</h3>
<pre class="programlisting"><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="returnvalue">hb_face_t</span></a> *
hb_coretext_face_create_from_blob_or_fail
(<em class="parameter"><code><a class="link" href="harfbuzz-hb-blob.html#hb-blob-t" title="hb_blob_t"><span class="type">hb_blob_t</span></a> *blob</code></em>,
<em class="parameter"><code>unsigned <span class="type">int</span> index</code></em>);</pre>
<p>Creates an <a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> face object from the specified
blob and face index.</p>
<p>This is similar in functionality to <code class="function">hb_face_create_from_blob_or_fail()</code>,
but uses the CoreText library for loading the font data.</p>
<div class="refsect3">
<a name="hb-coretext-face-create-from-blob-or-fail.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>blob</p></td>
<td class="parameter_description"><p>A blob containing the font data</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>index</p></td>
<td class="parameter_description"><p>The index of the face within the blob</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="hb-coretext-face-create-from-blob-or-fail.returns"></a><h4>Returns</h4>
<p>The new face object, or <code class="literal">NULL</code> if
no face is found at the specified index or the blob cannot be read. </p>
<p><span class="annotation">[<acronym title="The caller owns the data, and is responsible for free it."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-11-0-0.html#api-index-11.0.0">11.0.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="hb-coretext-font-create"></a><h3>hb_coretext_font_create ()</h3>
<pre class="programlisting"><a class="link" href="harfbuzz-hb-font.html#hb-font-t" title="hb_font_t"><span class="returnvalue">hb_font_t</span></a> *
hb_coretext_font_create (<em class="parameter"><code><span class="type">CTFontRef</span> ct_font</code></em>);</pre>
<p>Creates an <a class="link" href="harfbuzz-hb-font.html#hb-font-t" title="hb_font_t"><span class="type">hb_font_t</span></a> font object from the specified
CTFontRef.</p>
<p>The created font uses the default font functions implemented
natively by HarfBuzz. If you want to use the CoreText font functions
instead (rarely needed), you can do so by calling
by <a class="link" href="harfbuzz-hb-coretext.html#hb-coretext-font-set-funcs" title="hb_coretext_font_set_funcs ()"><code class="function">hb_coretext_font_set_funcs()</code></a>.</p>
<div class="refsect3">
<a name="hb-coretext-font-create.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>ct_font</p></td>
<td class="parameter_description"><p>The CTFontRef to work upon</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="hb-coretext-font-create.returns"></a><h4>Returns</h4>
<p>The new font object. </p>
<p><span class="annotation">[<acronym title="The caller owns the data, and is responsible for free it."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-7-2.html#api-index-1.7.2">1.7.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="hb-coretext-face-get-cg-font"></a><h3>hb_coretext_face_get_cg_font ()</h3>
<pre class="programlisting"><span class="returnvalue">CGFontRef</span>
hb_coretext_face_get_cg_font (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> *face</code></em>);</pre>
<p>Fetches the CGFontRef associated with an <a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a>
face object</p>
<div class="refsect3">
<a name="hb-coretext-face-get-cg-font.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>face</p></td>
<td class="parameter_description"><p>The <a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> to work upon</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="hb-coretext-face-get-cg-font.returns"></a><h4>Returns</h4>
<p> the CGFontRef found</p>
</div>
<p class="since">Since: <a class="link" href="api-index-0-9-10.html#api-index-0.9.10">0.9.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="hb-coretext-font-get-ct-font"></a><h3>hb_coretext_font_get_ct_font ()</h3>
<pre class="programlisting"><span class="returnvalue">CTFontRef</span>
hb_coretext_font_get_ct_font (<em class="parameter"><code><a class="link" href="harfbuzz-hb-font.html#hb-font-t" title="hb_font_t"><span class="type">hb_font_t</span></a> *font</code></em>);</pre>
<p>Fetches the CTFontRef associated with the specified
<a class="link" href="harfbuzz-hb-font.html#hb-font-t" title="hb_font_t"><span class="type">hb_font_t</span></a> font object.</p>
<div class="refsect3">
<a name="hb-coretext-font-get-ct-font.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>font</p></td>
<td class="parameter_description"><p><a class="link" href="harfbuzz-hb-font.html#hb-font-t" title="hb_font_t"><span class="type">hb_font_t</span></a> to work upon</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="hb-coretext-font-get-ct-font.returns"></a><h4>Returns</h4>
<p> the CTFontRef found</p>
</div>
<p class="since">Since: <a class="link" href="api-index-0-9-10.html#api-index-0.9.10">0.9.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="hb-coretext-font-set-funcs"></a><h3>hb_coretext_font_set_funcs ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
hb_coretext_font_set_funcs (<em class="parameter"><code><a class="link" href="harfbuzz-hb-font.html#hb-font-t" title="hb_font_t"><span class="type">hb_font_t</span></a> *font</code></em>);</pre>
<p>Configures the font-functions structure of the specified
<a class="link" href="harfbuzz-hb-font.html#hb-font-t" title="hb_font_t"><span class="type">hb_font_t</span></a> font object to use CoreText font functions.</p>
<p>In particular, you can use this function to configure an
existing <a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> face object for use with CoreText font
functions even if that <a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> face object was initially
created with <a class="link" href="harfbuzz-hb-face.html#hb-face-create" title="hb_face_create ()"><code class="function">hb_face_create()</code></a>, and therefore was not
initially configured to use CoreText font functions.</p>
<div class="note">Note: Internally, this function creates a CTFont.
</div>
<div class="refsect3">
<a name="hb-coretext-font-set-funcs.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>font</p></td>
<td class="parameter_description"><p><a class="link" href="harfbuzz-hb-font.html#hb-font-t" title="hb_font_t"><span class="type">hb_font_t</span></a> to work upon</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-10-1-0.html#api-index-10.1.0">10.1.0</a></p>
</div>
</div>
<div class="refsect1">
<a name="harfbuzz-hb-coretext.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="HB-CORETEXT-TAG-KERX:CAPS"></a><h3>HB_CORETEXT_TAG_KERX</h3>
<pre class="programlisting">#define HB_CORETEXT_TAG_KERX HB_TAG('k','e','r','x')
</pre>
<p>The <a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> tag for the <code class="literal">kerx</code> (extended kerning) table, which
holds AAT kerning information.</p>
<p>For more information, see
https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6kerx.html</p>
</div>
<hr>
<div class="refsect2">
<a name="HB-CORETEXT-TAG-MORT:CAPS"></a><h3>HB_CORETEXT_TAG_MORT</h3>
<pre class="programlisting">#define HB_CORETEXT_TAG_MORT HB_TAG('m','o','r','t')
</pre>
<p>The <a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> tag for the <code class="literal">mort</code> (glyph metamorphosis) table,
which holds AAT features.</p>
<p>For more information, see
https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6mort.html</p>
</div>
<hr>
<div class="refsect2">
<a name="HB-CORETEXT-TAG-MORX:CAPS"></a><h3>HB_CORETEXT_TAG_MORX</h3>
<pre class="programlisting">#define HB_CORETEXT_TAG_MORX HB_TAG('m','o','r','x')
</pre>
<p>The <a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> tag for the <code class="literal">morx</code> (extended glyph metamorphosis)
table, which holds AAT features.</p>
<p>For more information, see
https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6morx.html</p>
</div>
</div>
</div>
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