<title>hb-ot-layout: HarfBuzz Manual</title>
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<a href="#harfbuzz-hb-ot-layout.object-hierarchy" class="shortcut">Object Hierarchy</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
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</tr></table>
<div class="refentry">
<a name="harfbuzz-hb-ot-layout"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="harfbuzz-hb-ot-layout.top_of_page"></a>hb-ot-layout</span></h2>
-<p>hb-ot-layout</p>
+<p>hb-ot-layout — OpenType Layout</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<tbody>
<tr>
<td class="function_type">
+<a class="link" href="harfbuzz-hb-common.html#hb-language-t" title="hb_language_t"><span class="returnvalue">hb_language_t</span></a>
+</td>
+<td class="function_name">
+<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-tag-to-language" title="hb_ot_tag_to_language ()">hb_ot_tag_to_language</a> <span class="c_punctuation">()</span>
+</td>
+</tr>
+<tr>
+<td class="function_type">
+<a class="link" href="harfbuzz-hb-common.html#hb-script-t" title="enum hb_script_t"><span class="returnvalue">hb_script_t</span></a>
+</td>
+<td class="function_name">
+<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-tag-to-script" title="hb_ot_tag_to_script ()">hb_ot_tag_to_script</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-ot-layout.html#hb-ot-tags-from-script-and-language" title="hb_ot_tags_from_script_and_language ()">hb_ot_tags_from_script_and_language</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-ot-layout.html#hb-ot-tags-to-script-and-language" title="hb_ot_tags_to_script_and_language ()">hb_ot_tags_to_script_and_language</a> <span class="c_punctuation">()</span>
+</td>
+</tr>
+<tr>
+<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
</td>
</tr>
<tr>
+<td class="function_type">
+<span class="returnvalue">void</span>
+</td>
+<td class="function_name">
+<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-collect-features" title="hb_ot_layout_collect_features ()">hb_ot_layout_collect_features</a> <span class="c_punctuation">()</span>
+</td>
+</tr>
+<tr>
+<td class="function_type">unsigned <span class="returnvalue">int</span>
+</td>
+<td class="function_name">
+<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-feature-get-characters" title="hb_ot_layout_feature_get_characters ()">hb_ot_layout_feature_get_characters</a> <span class="c_punctuation">()</span>
+</td>
+</tr>
+<tr>
<td class="function_type">unsigned <span class="returnvalue">int</span>
</td>
<td class="function_name">
</td>
</tr>
<tr>
+<td class="function_type">
+<a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
+</td>
+<td class="function_name">
+<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-feature-get-name-ids" title="hb_ot_layout_feature_get_name_ids ()">hb_ot_layout_feature_get_name_ids</a> <span class="c_punctuation">()</span>
+</td>
+</tr>
+<tr>
<td class="function_type">unsigned <span class="returnvalue">int</span>
</td>
<td class="function_name">
</td>
</tr>
<tr>
-<td class="function_type">
-<a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
-</td>
-<td class="function_name">
-<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-script-find-language" title="hb_ot_layout_script_find_language ()">hb_ot_layout_script_find_language</a> <span class="c_punctuation">()</span>
-</td>
-</tr>
-<tr>
<td class="function_type">unsigned <span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
</td>
<td class="function_name">
-<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-table-choose-script" title="hb_ot_layout_table_choose_script ()">hb_ot_layout_table_choose_script</a> <span class="c_punctuation">()</span>
+<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-script-select-language" title="hb_ot_layout_script_select_language ()">hb_ot_layout_script_select_language</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
</td>
</tr>
<tr>
-<td class="function_type">
-<a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
+<td class="function_type">unsigned <span class="returnvalue">int</span>
</td>
<td class="function_name">
-<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-table-find-script" title="hb_ot_layout_table_find_script ()">hb_ot_layout_table_find_script</a> <span class="c_punctuation">()</span>
+<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-table-get-feature-tags" title="hb_ot_layout_table_get_feature_tags ()">hb_ot_layout_table_get_feature_tags</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">unsigned <span class="returnvalue">int</span>
</td>
<td class="function_name">
-<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-table-get-feature-tags" title="hb_ot_layout_table_get_feature_tags ()">hb_ot_layout_table_get_feature_tags</a> <span class="c_punctuation">()</span>
+<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-table-get-script-tags" title="hb_ot_layout_table_get_script_tags ()">hb_ot_layout_table_get_script_tags</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">unsigned <span class="returnvalue">int</span>
</td>
<td class="function_name">
-<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-table-get-script-tags" title="hb_ot_layout_table_get_script_tags ()">hb_ot_layout_table_get_script_tags</a> <span class="c_punctuation">()</span>
+<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-table-get-lookup-count" title="hb_ot_layout_table_get_lookup_count ()">hb_ot_layout_table_get_lookup_count</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
-<td class="function_type">unsigned <span class="returnvalue">int</span>
+<td class="function_type">
+<a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
</td>
<td class="function_name">
-<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-table-get-lookup-count" title="hb_ot_layout_table_get_lookup_count ()">hb_ot_layout_table_get_lookup_count</a> <span class="c_punctuation">()</span>
+<a class="link" href="harfbuzz-hb-ot-layout.html#hb-ot-layout-table-select-script" title="hb_ot_layout_table_select_script ()">hb_ot_layout_table_select_script</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<tbody>
<tr>
<td class="define_keyword">#define</td>
+<td class="function_name"><a class="link" href="harfbuzz-hb-ot-layout.html#HB-OT-MAX-TAGS-PER-LANGUAGE:CAPS" title="HB_OT_MAX_TAGS_PER_LANGUAGE">HB_OT_MAX_TAGS_PER_LANGUAGE</a></td>
+</tr>
+<tr>
+<td class="define_keyword">#define</td>
+<td class="function_name"><a class="link" href="harfbuzz-hb-ot-layout.html#HB-OT-MAX-TAGS-PER-SCRIPT:CAPS" title="HB_OT_MAX_TAGS_PER_SCRIPT">HB_OT_MAX_TAGS_PER_SCRIPT</a></td>
+</tr>
+<tr>
+<td class="define_keyword">#define</td>
+<td class="function_name"><a class="link" href="harfbuzz-hb-ot-layout.html#HB-OT-TAG-DEFAULT-LANGUAGE:CAPS" title="HB_OT_TAG_DEFAULT_LANGUAGE">HB_OT_TAG_DEFAULT_LANGUAGE</a></td>
+</tr>
+<tr>
+<td class="define_keyword">#define</td>
+<td class="function_name"><a class="link" href="harfbuzz-hb-ot-layout.html#HB-OT-TAG-DEFAULT-SCRIPT:CAPS" title="HB_OT_TAG_DEFAULT_SCRIPT">HB_OT_TAG_DEFAULT_SCRIPT</a></td>
+</tr>
+<tr>
+<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="harfbuzz-hb-ot-layout.html#HB-OT-LAYOUT-DEFAULT-LANGUAGE-INDEX:CAPS" title="HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX">HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX</a></td>
</tr>
<tr>
</tr>
<tr>
<td class="define_keyword">#define</td>
+<td class="function_name"><a class="link" href="harfbuzz-hb-ot-layout.html#HB-OT-TAG-BASE:CAPS" title="HB_OT_TAG_BASE">HB_OT_TAG_BASE</a></td>
+</tr>
+<tr>
+<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="harfbuzz-hb-ot-layout.html#HB-OT-TAG-GDEF:CAPS" title="HB_OT_TAG_GDEF">HB_OT_TAG_GDEF</a></td>
</tr>
<tr>
</div>
<div class="refsect1">
<a name="harfbuzz-hb-ot-layout.object-hierarchy"></a><h2>Object Hierarchy</h2>
-<pre class="screen"> <a href="/home/behdad/.local/share/gtk-doc/html/gobject/gobject-Enumeration-and-Flag-Types.html">GEnum</a>
+<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/gobject-Enumeration-and-Flag-Types.html">GEnum</a>
<span class="lineart">╰──</span> hb_ot_layout_glyph_class_t
</pre>
</div>
<div class="refsect1">
+<a name="harfbuzz-hb-ot-layout.includes"></a><h2>Includes</h2>
+<pre class="synopsis">#include <hb-ot.h>
+</pre>
+</div>
+<div class="refsect1">
<a name="harfbuzz-hb-ot-layout.description"></a><h2>Description</h2>
+<p>Functions for querying OpenType Layout features in the font face.</p>
</div>
<div class="refsect1">
<a name="harfbuzz-hb-ot-layout.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
+<a name="hb-ot-tag-to-language"></a><h3>hb_ot_tag_to_language ()</h3>
+<pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-language-t" title="hb_language_t"><span class="returnvalue">hb_language_t</span></a>
+hb_ot_tag_to_language (<em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> tag</code></em>);</pre>
+<div class="refsect3">
+<a name="hb-ot-tag-to-language.returns"></a><h4>Returns</h4>
+<p>. </p>
+<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
+</div>
+<p class="since">Since: <a class="link" href="api-index-0-9-2.html#api-index-0.9.2">0.9.2</a></p>
+</div>
+<hr>
+<div class="refsect2">
+<a name="hb-ot-tag-to-script"></a><h3>hb_ot_tag_to_script ()</h3>
+<pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-script-t" title="enum hb_script_t"><span class="returnvalue">hb_script_t</span></a>
+hb_ot_tag_to_script (<em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> tag</code></em>);</pre>
+</div>
+<hr>
+<div class="refsect2">
+<a name="hb-ot-tags-from-script-and-language"></a><h3>hb_ot_tags_from_script_and_language ()</h3>
+<pre class="programlisting"><span class="returnvalue">void</span>
+hb_ot_tags_from_script_and_language (<em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-script-t" title="enum hb_script_t"><span class="type">hb_script_t</span></a> script</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-language-t" title="hb_language_t"><span class="type">hb_language_t</span></a> language</code></em>,
+ <em class="parameter"><code>unsigned <span class="type">int</span> *script_count</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> *script_tags</code></em>,
+ <em class="parameter"><code>unsigned <span class="type">int</span> *language_count</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> *language_tags</code></em>);</pre>
+<p>Converts an <a class="link" href="harfbuzz-hb-common.html#hb-script-t" title="enum hb_script_t"><span class="type">hb_script_t</span></a> and an <a class="link" href="harfbuzz-hb-common.html#hb-language-t" title="hb_language_t"><span class="type">hb_language_t</span></a> to script and language tags.</p>
+<div class="refsect3">
+<a name="hb-ot-tags-from-script-and-language.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>script</p></td>
+<td class="parameter_description"><p>an <a class="link" href="harfbuzz-hb-common.html#hb-script-t" title="enum hb_script_t"><span class="type">hb_script_t</span></a> to convert.</p></td>
+<td class="parameter_annotations"> </td>
+</tr>
+<tr>
+<td class="parameter_name"><p>language</p></td>
+<td class="parameter_description"><p>an <a class="link" href="harfbuzz-hb-common.html#hb-language-t" title="hb_language_t"><span class="type">hb_language_t</span></a> to convert.</p></td>
+<td class="parameter_annotations"> </td>
+</tr>
+<tr>
+<td class="parameter_name"><p>script_count</p></td>
+<td class="parameter_description"><p> maximum number of script tags to retrieve (IN)
+and actual number of script tags retrieved (OUT). </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
+</tr>
+<tr>
+<td class="parameter_name"><p>script_tags</p></td>
+<td class="parameter_description"><p> array of size at least <em class="parameter"><code>script_count</code></em>
+to store the
+script tag results. </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
+</tr>
+<tr>
+<td class="parameter_name"><p>language_count</p></td>
+<td class="parameter_description"><p> maximum number of language tags to retrieve
+(IN) and actual number of language tags retrieved (OUT). </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
+</tr>
+<tr>
+<td class="parameter_name"><p>language_tags</p></td>
+<td class="parameter_description"><p> array of size at least <em class="parameter"><code>language_count</code></em>
+to store
+the language tag results. </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<p class="since">Since: <a class="link" href="api-index-2-0-0.html#api-index-2.0.0">2.0.0</a></p>
+</div>
+<hr>
+<div class="refsect2">
+<a name="hb-ot-tags-to-script-and-language"></a><h3>hb_ot_tags_to_script_and_language ()</h3>
+<pre class="programlisting"><span class="returnvalue">void</span>
+hb_ot_tags_to_script_and_language (<em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> script_tag</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> language_tag</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-script-t" title="enum hb_script_t"><span class="type">hb_script_t</span></a> *script</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-language-t" title="hb_language_t"><span class="type">hb_language_t</span></a> *language</code></em>);</pre>
+<p>Converts a script tag and a language tag to an <a class="link" href="harfbuzz-hb-common.html#hb-script-t" title="enum hb_script_t"><span class="type">hb_script_t</span></a> and an
+<a class="link" href="harfbuzz-hb-common.html#hb-language-t" title="hb_language_t"><span class="type">hb_language_t</span></a>.</p>
+<div class="refsect3">
+<a name="hb-ot-tags-to-script-and-language.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>script_tag</p></td>
+<td class="parameter_description"><p>a script tag</p></td>
+<td class="parameter_annotations"> </td>
+</tr>
+<tr>
+<td class="parameter_name"><p>language_tag</p></td>
+<td class="parameter_description"><p>a language tag</p></td>
+<td class="parameter_annotations"> </td>
+</tr>
+<tr>
+<td class="parameter_name"><p>script</p></td>
+<td class="parameter_description"><p> the <a class="link" href="harfbuzz-hb-common.html#hb-script-t" title="enum hb_script_t"><span class="type">hb_script_t</span></a> corresponding to <em class="parameter"><code>script_tag</code></em>
+(OUT). </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
+</tr>
+<tr>
+<td class="parameter_name"><p>language</p></td>
+<td class="parameter_description"><p> the <a class="link" href="harfbuzz-hb-common.html#hb-language-t" title="hb_language_t"><span class="type">hb_language_t</span></a> corresponding to <em class="parameter"><code>script_tag</code></em>
+and
+<em class="parameter"><code>language_tag</code></em>
+(OUT). </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<p class="since">Since: <a class="link" href="api-index-2-0-0.html#api-index-2.0.0">2.0.0</a></p>
+</div>
+<hr>
+<div class="refsect2">
<a name="hb-ot-layout-collect-lookups"></a><h3>hb_ot_layout_collect_lookups ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
hb_ot_layout_collect_lookups (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
</div>
<hr>
<div class="refsect2">
+<a name="hb-ot-layout-collect-features"></a><h3>hb_ot_layout_collect_features ()</h3>
+<pre class="programlisting"><span class="returnvalue">void</span>
+hb_ot_layout_collect_features (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> table_tag</code></em>,
+ <em class="parameter"><code>const <a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> *scripts</code></em>,
+ <em class="parameter"><code>const <a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> *languages</code></em>,
+ <em class="parameter"><code>const <a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> *features</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-set.html#hb-set-t"><span class="type">hb_set_t</span></a> *feature_indexes</code></em>);</pre>
+<p class="since">Since: <a class="link" href="api-index-1-8-5.html#api-index-1.8.5">1.8.5</a></p>
+</div>
+<hr>
+<div class="refsect2">
+<a name="hb-ot-layout-feature-get-characters"></a><h3>hb_ot_layout_feature_get_characters ()</h3>
+<pre class="programlisting">unsigned <span class="returnvalue">int</span>
+hb_ot_layout_feature_get_characters (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> table_tag</code></em>,
+ <em class="parameter"><code>unsigned <span class="type">int</span> feature_index</code></em>,
+ <em class="parameter"><code>unsigned <span class="type">int</span> start_offset</code></em>,
+ <em class="parameter"><code>unsigned <span class="type">int</span> *char_count</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-codepoint-t" title="hb_codepoint_t"><span class="type">hb_codepoint_t</span></a> *characters</code></em>);</pre>
+<p>Fetches characters listed by designer under feature parameters for "Character
+Variant" ("cvXX") features.</p>
+<div class="refsect3">
+<a name="hb-ot-layout-feature-get-characters.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><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> to work upon</p></td>
+<td class="parameter_annotations"> </td>
+</tr>
+<tr>
+<td class="parameter_name"><p>table_tag</p></td>
+<td class="parameter_description"><p>table tag to query, "GSUB" or "GPOS".</p></td>
+<td class="parameter_annotations"> </td>
+</tr>
+<tr>
+<td class="parameter_name"><p>feature_index</p></td>
+<td class="parameter_description"><p>index of feature to query.</p></td>
+<td class="parameter_annotations"> </td>
+</tr>
+<tr>
+<td class="parameter_name"><p>start_offset</p></td>
+<td class="parameter_description"><p>In case the resulting char_count was equal to its input value, there
+is a chance there were more characters on the tag so this API can be
+called with an offset till resulting char_count gets to a number
+lower than input buffer (or consider using just a bigger buffer for
+one shot copying).</p></td>
+<td class="parameter_annotations"> </td>
+</tr>
+<tr>
+<td class="parameter_name"><p>char_count</p></td>
+<td class="parameter_description"><p> The count of characters for which this feature
+provides glyph variants. (May be zero.). </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input and for returning results. Default is transfer full."><span class="acronym">inout</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
+</tr>
+<tr>
+<td class="parameter_name"><p>characters</p></td>
+<td class="parameter_description"><p> A buffer pointer. The Unicode codepoints
+of the characters for which this feature provides glyph variants. </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out caller-allocates</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=char_count]</span></td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<div class="refsect3">
+<a name="hb-ot-layout-feature-get-characters.returns"></a><h4>Returns</h4>
+<p> Number of total sample characters in the cvXX feature.</p>
+</div>
+<p class="since">Since: <a class="link" href="api-index-2-0-0.html#api-index-2.0.0">2.0.0</a></p>
+</div>
+<hr>
+<div class="refsect2">
<a name="hb-ot-layout-feature-get-lookups"></a><h3>hb_ot_layout_feature_get_lookups ()</h3>
<pre class="programlisting">unsigned <span class="returnvalue">int</span>
hb_ot_layout_feature_get_lookups (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
</div>
<hr>
<div class="refsect2">
+<a name="hb-ot-layout-feature-get-name-ids"></a><h3>hb_ot_layout_feature_get_name_ids ()</h3>
+<pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
+hb_ot_layout_feature_get_name_ids (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> table_tag</code></em>,
+ <em class="parameter"><code>unsigned <span class="type">int</span> feature_index</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-name.html#hb-ot-name-id-t" title="hb_ot_name_id_t"><span class="type">hb_ot_name_id_t</span></a> *label_id</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-name.html#hb-ot-name-id-t" title="hb_ot_name_id_t"><span class="type">hb_ot_name_id_t</span></a> *tooltip_id</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-name.html#hb-ot-name-id-t" title="hb_ot_name_id_t"><span class="type">hb_ot_name_id_t</span></a> *sample_id</code></em>,
+ <em class="parameter"><code>unsigned <span class="type">int</span> *num_named_parameters</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-name.html#hb-ot-name-id-t" title="hb_ot_name_id_t"><span class="type">hb_ot_name_id_t</span></a> *first_param_id</code></em>);</pre>
+<p>Fetches name indices from feature parameters for "Stylistic Set" ('ssXX') or
+"Character Variant" ('cvXX') features.</p>
+<div class="refsect3">
+<a name="hb-ot-layout-feature-get-name-ids.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><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> to work upon</p></td>
+<td class="parameter_annotations"> </td>
+</tr>
+<tr>
+<td class="parameter_name"><p>table_tag</p></td>
+<td class="parameter_description"><p>table tag to query, "GSUB" or "GPOS".</p></td>
+<td class="parameter_annotations"> </td>
+</tr>
+<tr>
+<td class="parameter_name"><p>feature_index</p></td>
+<td class="parameter_description"><p>index of feature to query.</p></td>
+<td class="parameter_annotations"> </td>
+</tr>
+<tr>
+<td class="parameter_name"><p>label_id</p></td>
+<td class="parameter_description"><p> The ‘name’ table name ID that specifies a string
+for a user-interface label for this feature. (May be NULL.). </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
+</tr>
+<tr>
+<td class="parameter_name"><p>tooltip_id</p></td>
+<td class="parameter_description"><p> The ‘name’ table name ID that specifies a string
+that an application can use for tooltip text for this
+feature. (May be NULL.). </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
+</tr>
+<tr>
+<td class="parameter_name"><p>sample_id</p></td>
+<td class="parameter_description"><p> The ‘name’ table name ID that specifies sample text
+that illustrates the effect of this feature. (May be NULL.). </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
+</tr>
+<tr>
+<td class="parameter_name"><p>num_named_parameters</p></td>
+<td class="parameter_description"><p> Number of named parameters. (May be zero.). </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
+</tr>
+<tr>
+<td class="parameter_name"><p>first_param_id</p></td>
+<td class="parameter_description"><p> The first ‘name’ table name ID used to specify
+strings for user-interface labels for the feature
+parameters. (Must be zero if numParameters is zero.). </p></td>
+<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
+</tr>
+</tbody>
+</table></div>
+</div>
+<div class="refsect3">
+<a name="hb-ot-layout-feature-get-name-ids.returns"></a><h4>Returns</h4>
+<p> true if data found, false otherwise</p>
+</div>
+<p class="since">Since: <a class="link" href="api-index-2-0-0.html#api-index-2.0.0">2.0.0</a></p>
+</div>
+<hr>
+<div class="refsect2">
<a name="hb-ot-layout-feature-with-variations-get-lookups"></a><h3>hb_ot_layout_feature_with_variations_get_lookups ()</h3>
<pre class="programlisting">unsigned <span class="returnvalue">int</span>
hb_ot_layout_feature_with_variations_get_lookups
hb_ot_layout_get_size_params (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
<em class="parameter"><code>unsigned <span class="type">int</span> *design_size</code></em>,
<em class="parameter"><code>unsigned <span class="type">int</span> *subfamily_id</code></em>,
- <em class="parameter"><code>unsigned <span class="type">int</span> *subfamily_name_id</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-name.html#hb-ot-name-id-t" title="hb_ot_name_id_t"><span class="type">hb_ot_name_id_t</span></a> *subfamily_name_id</code></em>,
<em class="parameter"><code>unsigned <span class="type">int</span> *range_start</code></em>,
<em class="parameter"><code>unsigned <span class="type">int</span> *range_end</code></em>);</pre>
<p class="since">Since: <a class="link" href="api-index-0-9-10.html#api-index-0.9.10">0.9.10</a></p>
<em class="parameter"><code><a class="link" href="harfbuzz-hb-set.html#hb-set-t"><span class="type">hb_set_t</span></a> *glyphs</code></em>);</pre>
<p>Compute the transitive closure of glyphs needed for all of the
provided lookups.</p>
-<p class="since">Since: 1.8.1</p>
+<p class="since">Since: <a class="link" href="api-index-1-8-1.html#api-index-1.8.1">1.8.1</a></p>
</div>
<hr>
<div class="refsect2">
</div>
<hr>
<div class="refsect2">
-<a name="hb-ot-layout-script-find-language"></a><h3>hb_ot_layout_script_find_language ()</h3>
-<pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
-hb_ot_layout_script_find_language (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
- <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> table_tag</code></em>,
- <em class="parameter"><code>unsigned <span class="type">int</span> script_index</code></em>,
- <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> language_tag</code></em>,
- <em class="parameter"><code>unsigned <span class="type">int</span> *language_index</code></em>);</pre>
-</div>
-<hr>
-<div class="refsect2">
<a name="hb-ot-layout-script-get-language-tags"></a><h3>hb_ot_layout_script_get_language_tags ()</h3>
<pre class="programlisting">unsigned <span class="returnvalue">int</span>
hb_ot_layout_script_get_language_tags (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
</div>
<hr>
<div class="refsect2">
-<a name="hb-ot-layout-table-choose-script"></a><h3>hb_ot_layout_table_choose_script ()</h3>
+<a name="hb-ot-layout-script-select-language"></a><h3>hb_ot_layout_script_select_language ()</h3>
<pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
-hb_ot_layout_table_choose_script (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
- <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> table_tag</code></em>,
- <em class="parameter"><code>const <a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> *script_tags</code></em>,
- <em class="parameter"><code>unsigned <span class="type">int</span> *script_index</code></em>,
- <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> *chosen_script</code></em>);</pre>
+hb_ot_layout_script_select_language (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> table_tag</code></em>,
+ <em class="parameter"><code>unsigned <span class="type">int</span> script_index</code></em>,
+ <em class="parameter"><code>unsigned <span class="type">int</span> language_count</code></em>,
+ <em class="parameter"><code>const <a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> *language_tags</code></em>,
+ <em class="parameter"><code>unsigned <span class="type">int</span> *language_index</code></em>);</pre>
+<p class="since">Since: <a class="link" href="api-index-2-0-0.html#api-index-2.0.0">2.0.0</a></p>
</div>
<hr>
<div class="refsect2">
</div>
<hr>
<div class="refsect2">
-<a name="hb-ot-layout-table-find-script"></a><h3>hb_ot_layout_table_find_script ()</h3>
-<pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
-hb_ot_layout_table_find_script (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
- <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> table_tag</code></em>,
- <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> script_tag</code></em>,
- <em class="parameter"><code>unsigned <span class="type">int</span> *script_index</code></em>);</pre>
-</div>
-<hr>
-<div class="refsect2">
<a name="hb-ot-layout-table-get-feature-tags"></a><h3>hb_ot_layout_table_get_feature_tags ()</h3>
<pre class="programlisting">unsigned <span class="returnvalue">int</span>
hb_ot_layout_table_get_feature_tags (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
</div>
<hr>
<div class="refsect2">
+<a name="hb-ot-layout-table-select-script"></a><h3>hb_ot_layout_table_select_script ()</h3>
+<pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
+hb_ot_layout_table_select_script (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t"><span class="type">hb_face_t</span></a> *face</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> table_tag</code></em>,
+ <em class="parameter"><code>unsigned <span class="type">int</span> script_count</code></em>,
+ <em class="parameter"><code>const <a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> *script_tags</code></em>,
+ <em class="parameter"><code>unsigned <span class="type">int</span> *script_index</code></em>,
+ <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-tag-t" title="hb_tag_t"><span class="type">hb_tag_t</span></a> *chosen_script</code></em>);</pre>
+<p class="since">Since: <a class="link" href="api-index-2-0-0.html#api-index-2.0.0">2.0.0</a></p>
+</div>
+<hr>
+<div class="refsect2">
<a name="hb-ot-shape-plan-collect-lookups"></a><h3>hb_ot_shape_plan_collect_lookups ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
hb_ot_shape_plan_collect_lookups (<em class="parameter"><code><a class="link" href="harfbuzz-hb-shape-plan.html#hb-shape-plan-t"><span class="type">hb_shape_plan_t</span></a> *shape_plan</code></em>,
<div class="refsect1">
<a name="harfbuzz-hb-ot-layout.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
+<a name="HB-OT-MAX-TAGS-PER-LANGUAGE:CAPS"></a><h3>HB_OT_MAX_TAGS_PER_LANGUAGE</h3>
+<pre class="programlisting">#define HB_OT_MAX_TAGS_PER_LANGUAGE 3u
+</pre>
+<p class="since">Since: <a class="link" href="api-index-2-0-0.html#api-index-2.0.0">2.0.0</a></p>
+</div>
+<hr>
+<div class="refsect2">
+<a name="HB-OT-MAX-TAGS-PER-SCRIPT:CAPS"></a><h3>HB_OT_MAX_TAGS_PER_SCRIPT</h3>
+<pre class="programlisting">#define HB_OT_MAX_TAGS_PER_SCRIPT 3u
+</pre>
+<p class="since">Since: <a class="link" href="api-index-2-0-0.html#api-index-2.0.0">2.0.0</a></p>
+</div>
+<hr>
+<div class="refsect2">
+<a name="HB-OT-TAG-DEFAULT-LANGUAGE:CAPS"></a><h3>HB_OT_TAG_DEFAULT_LANGUAGE</h3>
+<pre class="programlisting">#define HB_OT_TAG_DEFAULT_LANGUAGE HB_TAG ('d', 'f', 'l', 't')
+</pre>
+</div>
+<hr>
+<div class="refsect2">
+<a name="HB-OT-TAG-DEFAULT-SCRIPT:CAPS"></a><h3>HB_OT_TAG_DEFAULT_SCRIPT</h3>
+<pre class="programlisting">#define HB_OT_TAG_DEFAULT_SCRIPT HB_TAG ('D', 'F', 'L', 'T')
+</pre>
+</div>
+<hr>
+<div class="refsect2">
<a name="HB-OT-LAYOUT-DEFAULT-LANGUAGE-INDEX:CAPS"></a><h3>HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX</h3>
<pre class="programlisting">#define HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX 0xFFFFu
</pre>
</div>
<hr>
<div class="refsect2">
+<a name="HB-OT-TAG-BASE:CAPS"></a><h3>HB_OT_TAG_BASE</h3>
+<pre class="programlisting">#define HB_OT_TAG_BASE HB_TAG('B','A','S','E')
+</pre>
+</div>
+<hr>
+<div class="refsect2">
<a name="HB-OT-TAG-GDEF:CAPS"></a><h3>HB_OT_TAG_GDEF</h3>
<pre class="programlisting">#define HB_OT_TAG_GDEF HB_TAG('G','D','E','F')
</pre>
</div>
</div>
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+<hr>Generated by GTK-Doc V1.25</div>
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