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                  <a href="#harfbuzz-hb-ot-metrics.description" class="shortcut">Description</a></span>
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<a name="harfbuzz-hb-ot-metrics"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
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<h2><span class="refentrytitle"><a name="harfbuzz-hb-ot-metrics.top_of_page"></a>hb-ot-metrics</span></h2>
<p>hb-ot-metrics — OpenType Metrics</p>
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<div class="refsect1">
<a name="harfbuzz-hb-ot-metrics.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-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-metrics.html#hb-ot-metrics-get-position" title="hb_ot_metrics_get_position ()">hb_ot_metrics_get_position</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">float</span>
</td>
<td class="function_name">
<a class="link" href="harfbuzz-hb-ot-metrics.html#hb-ot-metrics-get-variation" title="hb_ot_metrics_get_variation ()">hb_ot_metrics_get_variation</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
</td>
<td class="function_name">
<a class="link" href="harfbuzz-hb-ot-metrics.html#hb-ot-metrics-get-x-variation" title="hb_ot_metrics_get_x_variation ()">hb_ot_metrics_get_x_variation</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
</td>
<td class="function_name">
<a class="link" href="harfbuzz-hb-ot-metrics.html#hb-ot-metrics-get-y-variation" title="hb_ot_metrics_get_y_variation ()">hb_ot_metrics_get_y_variation</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="harfbuzz-hb-ot-metrics.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="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="harfbuzz-hb-ot-metrics.html#hb-ot-metrics-tag-t" title="enum hb_ot_metrics_tag_t">hb_ot_metrics_tag_t</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="harfbuzz-hb-ot-metrics.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;hb-ot.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="harfbuzz-hb-ot-metrics.description"></a><h2>Description</h2>
<p>Functions for fetching metrics from fonts.</p>
</div>
<div class="refsect1">
<a name="harfbuzz-hb-ot-metrics.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="hb-ot-metrics-get-position"></a><h3>hb_ot_metrics_get_position ()</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_metrics_get_position (<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>,
                            <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-metrics.html#hb-ot-metrics-tag-t" title="enum hb_ot_metrics_tag_t"><span class="type">hb_ot_metrics_tag_t</span></a> metrics_tag</code></em>,
                            <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="type">hb_position_t</span></a> *position</code></em>);</pre>
<p>It fetches metrics value corresponding to a given tag from a font.</p>
<div class="refsect3">
<a name="hb-ot-metrics-get-position.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 <a class="link" href="harfbuzz-hb-font.html#hb-font-t" title="hb_font_t"><span class="type">hb_font_t</span></a> object.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>metrics_tag</p></td>
<td class="parameter_description"><p>tag of metrics value you like to fetch.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>position</p></td>
<td class="parameter_description"><p>result of metrics value from the font. </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 may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="hb-ot-metrics-get-position.returns"></a><h4>Returns</h4>
<p> Whether found the requested metrics in the font.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-6-0.html#api-index-2.6.0">2.6.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="hb-ot-metrics-get-variation"></a><h3>hb_ot_metrics_get_variation ()</h3>
<pre class="programlisting"><span class="returnvalue">float</span>
hb_ot_metrics_get_variation (<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>,
                             <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-metrics.html#hb-ot-metrics-tag-t" title="enum hb_ot_metrics_tag_t"><span class="type">hb_ot_metrics_tag_t</span></a> metrics_tag</code></em>);</pre>
<p class="since">Since: <a class="link" href="api-index-2-6-0.html#api-index-2.6.0">2.6.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="hb-ot-metrics-get-x-variation"></a><h3>hb_ot_metrics_get_x_variation ()</h3>
<pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
hb_ot_metrics_get_x_variation (<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>,
                               <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-metrics.html#hb-ot-metrics-tag-t" title="enum hb_ot_metrics_tag_t"><span class="type">hb_ot_metrics_tag_t</span></a> metrics_tag</code></em>);</pre>
<p class="since">Since: <a class="link" href="api-index-2-6-0.html#api-index-2.6.0">2.6.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="hb-ot-metrics-get-y-variation"></a><h3>hb_ot_metrics_get_y_variation ()</h3>
<pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
hb_ot_metrics_get_y_variation (<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>,
                               <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-metrics.html#hb-ot-metrics-tag-t" title="enum hb_ot_metrics_tag_t"><span class="type">hb_ot_metrics_tag_t</span></a> metrics_tag</code></em>);</pre>
<p class="since">Since: <a class="link" href="api-index-2-6-0.html#api-index-2.6.0">2.6.0</a></p>
</div>
</div>
<div class="refsect1">
<a name="harfbuzz-hb-ot-metrics.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="hb-ot-metrics-tag-t"></a><h3>enum hb_ot_metrics_tag_t</h3>
<p>From https://docs.microsoft.com/en-us/typography/opentype/spec/mvar<span class="type">value-tags</span></p>
<div class="refsect3">
<a name="hb-ot-metrics-tag-t.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-HORIZONTAL-ASCENDER:CAPS"></a>HB_OT_METRICS_TAG_HORIZONTAL_ASCENDER</p></td>
<td class="enum_member_description">
<p>horizontal ascender.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-HORIZONTAL-DESCENDER:CAPS"></a>HB_OT_METRICS_TAG_HORIZONTAL_DESCENDER</p></td>
<td class="enum_member_description">
<p>horizontal descender.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-HORIZONTAL-LINE-GAP:CAPS"></a>HB_OT_METRICS_TAG_HORIZONTAL_LINE_GAP</p></td>
<td class="enum_member_description">
<p>horizontal line gap.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-HORIZONTAL-CLIPPING-ASCENT:CAPS"></a>HB_OT_METRICS_TAG_HORIZONTAL_CLIPPING_ASCENT</p></td>
<td class="enum_member_description">
<p>horizontal clipping ascent.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-HORIZONTAL-CLIPPING-DESCENT:CAPS"></a>HB_OT_METRICS_TAG_HORIZONTAL_CLIPPING_DESCENT</p></td>
<td class="enum_member_description">
<p>horizontal clipping descent.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-VERTICAL-ASCENDER:CAPS"></a>HB_OT_METRICS_TAG_VERTICAL_ASCENDER</p></td>
<td class="enum_member_description">
<p>vertical ascender.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-VERTICAL-DESCENDER:CAPS"></a>HB_OT_METRICS_TAG_VERTICAL_DESCENDER</p></td>
<td class="enum_member_description">
<p>vertical descender.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-VERTICAL-LINE-GAP:CAPS"></a>HB_OT_METRICS_TAG_VERTICAL_LINE_GAP</p></td>
<td class="enum_member_description">
<p>vertical line gap.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-HORIZONTAL-CARET-RISE:CAPS"></a>HB_OT_METRICS_TAG_HORIZONTAL_CARET_RISE</p></td>
<td class="enum_member_description">
<p>horizontal caret rise.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-HORIZONTAL-CARET-RUN:CAPS"></a>HB_OT_METRICS_TAG_HORIZONTAL_CARET_RUN</p></td>
<td class="enum_member_description">
<p>horizontal caret run.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-HORIZONTAL-CARET-OFFSET:CAPS"></a>HB_OT_METRICS_TAG_HORIZONTAL_CARET_OFFSET</p></td>
<td class="enum_member_description">
<p>horizontal caret offset.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-VERTICAL-CARET-RISE:CAPS"></a>HB_OT_METRICS_TAG_VERTICAL_CARET_RISE</p></td>
<td class="enum_member_description">
<p>vertical caret rise.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-VERTICAL-CARET-RUN:CAPS"></a>HB_OT_METRICS_TAG_VERTICAL_CARET_RUN</p></td>
<td class="enum_member_description">
<p>vertical caret run.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-VERTICAL-CARET-OFFSET:CAPS"></a>HB_OT_METRICS_TAG_VERTICAL_CARET_OFFSET</p></td>
<td class="enum_member_description">
<p>vertical caret offset.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-X-HEIGHT:CAPS"></a>HB_OT_METRICS_TAG_X_HEIGHT</p></td>
<td class="enum_member_description">
<p>x height.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-CAP-HEIGHT:CAPS"></a>HB_OT_METRICS_TAG_CAP_HEIGHT</p></td>
<td class="enum_member_description">
<p>cap height.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-SUBSCRIPT-EM-X-SIZE:CAPS"></a>HB_OT_METRICS_TAG_SUBSCRIPT_EM_X_SIZE</p></td>
<td class="enum_member_description">
<p>subscript em x size.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-SUBSCRIPT-EM-Y-SIZE:CAPS"></a>HB_OT_METRICS_TAG_SUBSCRIPT_EM_Y_SIZE</p></td>
<td class="enum_member_description">
<p>subscript em y size.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-SUBSCRIPT-EM-X-OFFSET:CAPS"></a>HB_OT_METRICS_TAG_SUBSCRIPT_EM_X_OFFSET</p></td>
<td class="enum_member_description">
<p>subscript em x offset.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-SUBSCRIPT-EM-Y-OFFSET:CAPS"></a>HB_OT_METRICS_TAG_SUBSCRIPT_EM_Y_OFFSET</p></td>
<td class="enum_member_description">
<p>subscript em y offset.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-SUPERSCRIPT-EM-X-SIZE:CAPS"></a>HB_OT_METRICS_TAG_SUPERSCRIPT_EM_X_SIZE</p></td>
<td class="enum_member_description">
<p>superscript em x size.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-SUPERSCRIPT-EM-Y-SIZE:CAPS"></a>HB_OT_METRICS_TAG_SUPERSCRIPT_EM_Y_SIZE</p></td>
<td class="enum_member_description">
<p>superscript em y size.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-SUPERSCRIPT-EM-X-OFFSET:CAPS"></a>HB_OT_METRICS_TAG_SUPERSCRIPT_EM_X_OFFSET</p></td>
<td class="enum_member_description">
<p>superscript em x offset.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-SUPERSCRIPT-EM-Y-OFFSET:CAPS"></a>HB_OT_METRICS_TAG_SUPERSCRIPT_EM_Y_OFFSET</p></td>
<td class="enum_member_description">
<p>superscript em y offset.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-STRIKEOUT-SIZE:CAPS"></a>HB_OT_METRICS_TAG_STRIKEOUT_SIZE</p></td>
<td class="enum_member_description">
<p>strikeout size.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-STRIKEOUT-OFFSET:CAPS"></a>HB_OT_METRICS_TAG_STRIKEOUT_OFFSET</p></td>
<td class="enum_member_description">
<p>strikeout offset.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-UNDERLINE-SIZE:CAPS"></a>HB_OT_METRICS_TAG_UNDERLINE_SIZE</p></td>
<td class="enum_member_description">
<p>underline size.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-UNDERLINE-OFFSET:CAPS"></a>HB_OT_METRICS_TAG_UNDERLINE_OFFSET</p></td>
<td class="enum_member_description">
<p>underline offset.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="HB-OT-METRICS-TAG-MAX-VALUE:CAPS"></a>_HB_OT_METRICS_TAG_MAX_VALUE</p></td>
<td> </td>
<td> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-6-0.html#api-index-2.6.0">2.6.0</a></p>
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