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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-ot-math: 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="ch13.html" title="OpenType API"> <link rel="prev" href="harfbuzz-hb-ot-layout.html" title="hb-ot-layout"> <link rel="next" href="harfbuzz-hb-ot-meta.html" title="hb-ot-meta"> <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"> <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> <a href="#harfbuzz-hb-ot-math.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="ch13.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="harfbuzz-hb-ot-layout.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="harfbuzz-hb-ot-meta.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="refentry"> <a name="harfbuzz-hb-ot-math"></a><div class="titlepage"></div> <div class="refnamediv"><table width="100%"><tr> <td valign="top"> <h2><span class="refentrytitle"><a name="harfbuzz-hb-ot-math.top_of_page"></a>hb-ot-math</span></h2> <p>hb-ot-math — OpenType Math information</p> </td> <td class="gallery_image" valign="top" align="right"></td> </tr></table></div> <div class="refsect1"> <a name="harfbuzz-hb-ot-math.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-math.html#hb-ot-math-has-data" title="hb_ot_math_has_data ()">hb_ot_math_has_data</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-math.html#hb-ot-math-get-constant" title="hb_ot_math_get_constant ()">hb_ot_math_get_constant</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-math.html#hb-ot-math-get-glyph-italics-correction" title="hb_ot_math_get_glyph_italics_correction ()">hb_ot_math_get_glyph_italics_correction</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-math.html#hb-ot-math-get-glyph-top-accent-attachment" title="hb_ot_math_get_glyph_top_accent_attachment ()">hb_ot_math_get_glyph_top_accent_attachment</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-math.html#hb-ot-math-get-glyph-kerning" title="hb_ot_math_get_glyph_kerning ()">hb_ot_math_get_glyph_kerning</a> <span class="c_punctuation">()</span> </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-math.html#hb-ot-math-is-glyph-extended-shape" title="hb_ot_math_is_glyph_extended_shape ()">hb_ot_math_is_glyph_extended_shape</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-math.html#hb-ot-math-get-glyph-variants" title="hb_ot_math_get_glyph_variants ()">hb_ot_math_get_glyph_variants</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-math.html#hb-ot-math-get-min-connector-overlap" title="hb_ot_math_get_min_connector_overlap ()">hb_ot_math_get_min_connector_overlap</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-math.html#hb-ot-math-get-glyph-assembly" title="hb_ot_math_get_glyph_assembly ()">hb_ot_math_get_glyph_assembly</a> <span class="c_punctuation">()</span> </td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="harfbuzz-hb-ot-math.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-ot-math.html#HB-OT-TAG-MATH:CAPS" title="HB_OT_TAG_MATH">HB_OT_TAG_MATH</a></td> </tr> <tr> <td class="define_keyword">#define</td> <td class="function_name"><a class="link" href="harfbuzz-hb-ot-math.html#HB-OT-MATH-SCRIPT:CAPS" title="HB_OT_MATH_SCRIPT">HB_OT_MATH_SCRIPT</a></td> </tr> <tr> <td class="datatype_keyword">enum</td> <td class="function_name"><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-constant-t" title="enum hb_ot_math_constant_t">hb_ot_math_constant_t</a></td> </tr> <tr> <td class="datatype_keyword">enum</td> <td class="function_name"><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-kern-t" title="enum hb_ot_math_kern_t">hb_ot_math_kern_t</a></td> </tr> <tr> <td class="datatype_keyword"> </td> <td class="function_name"><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-variant-t" title="hb_ot_math_glyph_variant_t">hb_ot_math_glyph_variant_t</a></td> </tr> <tr> <td class="datatype_keyword">enum</td> <td class="function_name"><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-part-flags-t" title="enum hb_ot_math_glyph_part_flags_t">hb_ot_math_glyph_part_flags_t</a></td> </tr> <tr> <td class="datatype_keyword"> </td> <td class="function_name"><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-part-t" title="hb_ot_math_glyph_part_t">hb_ot_math_glyph_part_t</a></td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="harfbuzz-hb-ot-math.includes"></a><h2>Includes</h2> <pre class="synopsis">#include <hb-ot.h> </pre> </div> <div class="refsect1"> <a name="harfbuzz-hb-ot-math.description"></a><h2>Description</h2> <p>Functions for fetching mathematics layout data from OpenType fonts.</p> <p>HarfBuzz itself does not implement a math layout solution. The functions and types provided can be used by client programs to access the font data necessary for typesetting OpenType Math layout.</p> </div> <div class="refsect1"> <a name="harfbuzz-hb-ot-math.functions_details"></a><h2>Functions</h2> <div class="refsect2"> <a name="hb-ot-math-has-data"></a><h3>hb_ot_math_has_data ()</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_math_has_data (<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>Tests whether a face has a <code class="literal">MATH</code> table.</p> <div class="refsect3"> <a name="hb-ot-math-has-data.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" title="hb_face_t"><span class="type">hb_face_t</span></a> to test</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-math-has-data.returns"></a><h4>Returns</h4> <p> true if the table is found, false otherwise</p> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-get-constant"></a><h3>hb_ot_math_get_constant ()</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_math_get_constant (<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-math.html#hb-ot-math-constant-t" title="enum hb_ot_math_constant_t"><span class="type">hb_ot_math_constant_t</span></a> constant</code></em>);</pre> <p>Fetches the specified math constant. For most constants, the value returned is an <a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="type">hb_position_t</span></a>.</p> <p>However, if the requested constant is <a class="link" href="harfbuzz-hb-ot-math.html#HB-OT-MATH-CONSTANT-SCRIPT-PERCENT-SCALE-DOWN:CAPS"><span class="type">HB_OT_MATH_CONSTANT_SCRIPT_PERCENT_SCALE_DOWN</span></a>, <a class="link" href="harfbuzz-hb-ot-math.html#HB-OT-MATH-CONSTANT-SCRIPT-SCRIPT-PERCENT-SCALE-DOWN:CAPS"><span class="type">HB_OT_MATH_CONSTANT_SCRIPT_SCRIPT_PERCENT_SCALE_DOWN</span></a> or <a class="link" href="harfbuzz-hb-ot-math.html#HB-OT-MATH-CONSTANT-SCRIPT-PERCENT-SCALE-DOWN:CAPS"><span class="type">HB_OT_MATH_CONSTANT_SCRIPT_PERCENT_SCALE_DOWN</span></a>, then the return value is an integer between 0 and 100 representing that percentage.</p> <div class="refsect3"> <a name="hb-ot-math-get-constant.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> <tr> <td class="parameter_name"><p>constant</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-constant-t" title="enum hb_ot_math_constant_t"><span class="type">hb_ot_math_constant_t</span></a> the constant to retrieve</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-math-get-constant.returns"></a><h4>Returns</h4> <p> the requested constant or zero</p> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-get-glyph-italics-correction"></a><h3>hb_ot_math_get_glyph_italics_correction ()</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_math_get_glyph_italics_correction (<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-common.html#hb-codepoint-t" title="hb_codepoint_t"><span class="type">hb_codepoint_t</span></a> glyph</code></em>);</pre> <p>Fetches an italics-correction value (if one exists) for the specified glyph index.</p> <div class="refsect3"> <a name="hb-ot-math-get-glyph-italics-correction.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> <tr> <td class="parameter_name"><p>glyph</p></td> <td class="parameter_description"><p>The glyph index from which to retrieve the value</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-math-get-glyph-italics-correction.returns"></a><h4>Returns</h4> <p> the italics correction of the glyph or zero</p> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-get-glyph-top-accent-attachment"></a><h3>hb_ot_math_get_glyph_top_accent_attachment ()</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_math_get_glyph_top_accent_attachment (<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-common.html#hb-codepoint-t" title="hb_codepoint_t"><span class="type">hb_codepoint_t</span></a> glyph</code></em>);</pre> <p>Fetches a top-accent-attachment value (if one exists) for the specified glyph index.</p> <p>For any glyph that does not have a top-accent-attachment value - that is, a glyph not covered by the <code class="literal">MathTopAccentAttachment</code> table (or, when <em class="parameter"><code>font</code></em> has no <code class="literal">MathTopAccentAttachment</code> table or no <code class="literal">MATH</code> table, any glyph) - the function synthesizes a value, returning the position at one-half the glyph's advance width.</p> <div class="refsect3"> <a name="hb-ot-math-get-glyph-top-accent-attachment.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> <tr> <td class="parameter_name"><p>glyph</p></td> <td class="parameter_description"><p>The glyph index from which to retrieve the value</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-math-get-glyph-top-accent-attachment.returns"></a><h4>Returns</h4> <p> the top accent attachment of the glyph or 0.5 * the advance width of <em class="parameter"><code>glyph</code></em> </p> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-get-glyph-kerning"></a><h3>hb_ot_math_get_glyph_kerning ()</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_math_get_glyph_kerning (<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-common.html#hb-codepoint-t" title="hb_codepoint_t"><span class="type">hb_codepoint_t</span></a> glyph</code></em>, <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-kern-t" title="enum hb_ot_math_kern_t"><span class="type">hb_ot_math_kern_t</span></a> kern</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> correction_height</code></em>);</pre> <p>Fetches the math kerning (cut-ins) value for the specified font, glyph index, and <em class="parameter"><code>kern</code></em> . </p> <p>If the MathKern table is found, the function examines it to find a height value that is greater or equal to <em class="parameter"><code>correction_height</code></em> . If such a height value is found, corresponding kerning value from the table is returned. If no such height value is found, the last kerning value is returned.</p> <div class="refsect3"> <a name="hb-ot-math-get-glyph-kerning.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> <tr> <td class="parameter_name"><p>glyph</p></td> <td class="parameter_description"><p>The glyph index from which to retrieve the value</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>kern</p></td> <td class="parameter_description"><p>The <a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-kern-t" title="enum hb_ot_math_kern_t"><span class="type">hb_ot_math_kern_t</span></a> from which to retrieve the value</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>correction_height</p></td> <td class="parameter_description"><p>the correction height to use to determine the kerning.</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-math-get-glyph-kerning.returns"></a><h4>Returns</h4> <p> requested kerning value or zero</p> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-is-glyph-extended-shape"></a><h3>hb_ot_math_is_glyph_extended_shape ()</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_math_is_glyph_extended_shape (<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>, <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> glyph</code></em>);</pre> <p>Tests whether the given glyph index is an extended shape in the face.</p> <div class="refsect3"> <a name="hb-ot-math-is-glyph-extended-shape.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" title="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>glyph</p></td> <td class="parameter_description"><p>The glyph index to test</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-math-is-glyph-extended-shape.returns"></a><h4>Returns</h4> <p> true if the glyph is an extended shape, false otherwise</p> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-get-glyph-variants"></a><h3>hb_ot_math_get_glyph_variants ()</h3> <pre class="programlisting">unsigned <span class="returnvalue">int</span> hb_ot_math_get_glyph_variants (<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-common.html#hb-codepoint-t" title="hb_codepoint_t"><span class="type">hb_codepoint_t</span></a> glyph</code></em>, <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-direction-t" title="enum hb_direction_t"><span class="type">hb_direction_t</span></a> direction</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> *variants_count</code></em>, <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-variant-t" title="hb_ot_math_glyph_variant_t"><span class="type">hb_ot_math_glyph_variant_t</span></a> *variants</code></em>);</pre> <p>Fetches the MathGlyphConstruction for the specified font, glyph index, and direction. The corresponding list of size variants is returned as a list of <a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-variant-t" title="hb_ot_math_glyph_variant_t"><span class="type">hb_ot_math_glyph_variant_t</span></a> structs.</p> <div class="note">The <em class="parameter"><code>direction</code></em> parameter is only used to select between horizontal or vertical directions for the construction. Even though all <a class="link" href="harfbuzz-hb-common.html#hb-direction-t" title="enum hb_direction_t"><span class="type">hb_direction_t</span></a> values are accepted, only the result of <a class="link" href="harfbuzz-hb-common.html#HB-DIRECTION-IS-HORIZONTAL:CAPS" title="HB_DIRECTION_IS_HORIZONTAL()"><span class="type">HB_DIRECTION_IS_HORIZONTAL</span></a> is considered.</div> <div class="refsect3"> <a name="hb-ot-math-get-glyph-variants.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> <tr> <td class="parameter_name"><p>glyph</p></td> <td class="parameter_description"><p>The index of the glyph to stretch</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>direction</p></td> <td class="parameter_description"><p>The direction of the stretching (horizontal or vertical)</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>start_offset</p></td> <td class="parameter_description"><p>offset of the first variant to retrieve</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>variants_count</p></td> <td class="parameter_description"><p>Input = the maximum number of variants to return; Output = the actual number of variants returned. </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>]</span></td> </tr> <tr> <td class="parameter_name"><p>variants</p></td> <td class="parameter_description"><p>array of variants returned. </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="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=variants_count]</span></td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-math-get-glyph-variants.returns"></a><h4>Returns</h4> <p> the total number of size variants available or zero</p> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-get-min-connector-overlap"></a><h3>hb_ot_math_get_min_connector_overlap ()</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_math_get_min_connector_overlap (<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-common.html#hb-direction-t" title="enum hb_direction_t"><span class="type">hb_direction_t</span></a> direction</code></em>);</pre> <p>Fetches the MathVariants table for the specified font and returns the minimum overlap of connecting glyphs that are required to draw a glyph assembly in the specified direction.</p> <div class="note">The <em class="parameter"><code>direction</code></em> parameter is only used to select between horizontal or vertical directions for the construction. Even though all <a class="link" href="harfbuzz-hb-common.html#hb-direction-t" title="enum hb_direction_t"><span class="type">hb_direction_t</span></a> values are accepted, only the result of <a class="link" href="harfbuzz-hb-common.html#HB-DIRECTION-IS-HORIZONTAL:CAPS" title="HB_DIRECTION_IS_HORIZONTAL()"><span class="type">HB_DIRECTION_IS_HORIZONTAL</span></a> is considered.</div> <div class="refsect3"> <a name="hb-ot-math-get-min-connector-overlap.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> <tr> <td class="parameter_name"><p>direction</p></td> <td class="parameter_description"><p>direction of the stretching (horizontal or vertical)</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-math-get-min-connector-overlap.returns"></a><h4>Returns</h4> <p> requested minimum connector overlap or zero</p> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-get-glyph-assembly"></a><h3>hb_ot_math_get_glyph_assembly ()</h3> <pre class="programlisting">unsigned <span class="returnvalue">int</span> hb_ot_math_get_glyph_assembly (<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-common.html#hb-codepoint-t" title="hb_codepoint_t"><span class="type">hb_codepoint_t</span></a> glyph</code></em>, <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-direction-t" title="enum hb_direction_t"><span class="type">hb_direction_t</span></a> direction</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> *parts_count</code></em>, <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-part-t" title="hb_ot_math_glyph_part_t"><span class="type">hb_ot_math_glyph_part_t</span></a> *parts</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> *italics_correction</code></em>);</pre> <p>Fetches the GlyphAssembly for the specified font, glyph index, and direction. Returned are a list of <a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-part-t" title="hb_ot_math_glyph_part_t"><span class="type">hb_ot_math_glyph_part_t</span></a> glyph parts that can be used to draw the glyph and an italics-correction value (if one is defined in the font).</p> <div class="note">The <em class="parameter"><code>direction</code></em> parameter is only used to select between horizontal or vertical directions for the construction. Even though all <a class="link" href="harfbuzz-hb-common.html#hb-direction-t" title="enum hb_direction_t"><span class="type">hb_direction_t</span></a> values are accepted, only the result of <a class="link" href="harfbuzz-hb-common.html#HB-DIRECTION-IS-HORIZONTAL:CAPS" title="HB_DIRECTION_IS_HORIZONTAL()"><span class="type">HB_DIRECTION_IS_HORIZONTAL</span></a> is considered.</div> <div class="refsect3"> <a name="hb-ot-math-get-glyph-assembly.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> <tr> <td class="parameter_name"><p>glyph</p></td> <td class="parameter_description"><p>The index of the glyph to stretch</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>direction</p></td> <td class="parameter_description"><p>direction of the stretching (horizontal or vertical)</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>start_offset</p></td> <td class="parameter_description"><p>offset of the first glyph part to retrieve</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>parts_count</p></td> <td class="parameter_description"><p>Input = maximum number of glyph parts to return; Output = actual number of parts returned. </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>]</span></td> </tr> <tr> <td class="parameter_name"><p>parts</p></td> <td class="parameter_description"><p>the glyph parts returned. </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="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=parts_count]</span></td> </tr> <tr> <td class="parameter_name"><p>italics_correction</p></td> <td class="parameter_description"><p>italics correction of the glyph assembly. </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>]</span></td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-math-get-glyph-assembly.returns"></a><h4>Returns</h4> <p> the total number of parts in the glyph assembly</p> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> </div> <div class="refsect1"> <a name="harfbuzz-hb-ot-math.other_details"></a><h2>Types and Values</h2> <div class="refsect2"> <a name="HB-OT-TAG-MATH:CAPS"></a><h3>HB_OT_TAG_MATH</h3> <pre class="programlisting">#define HB_OT_TAG_MATH HB_TAG('M','A','T','H') </pre> </div> <hr> <div class="refsect2"> <a name="HB-OT-MATH-SCRIPT:CAPS"></a><h3>HB_OT_MATH_SCRIPT</h3> <pre class="programlisting">#define HB_OT_MATH_SCRIPT HB_TAG('m','a','t','h') </pre> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-constant-t"></a><h3>enum hb_ot_math_constant_t</h3> <p>The 'MATH' table constants specified at https://docs.microsoft.com/en-us/typography/opentype/spec/math</p> <div class="refsect3"> <a name="hb-ot-math-constant-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-MATH-CONSTANT-SCRIPT-PERCENT-SCALE-DOWN:CAPS"></a>HB_OT_MATH_CONSTANT_SCRIPT_PERCENT_SCALE_DOWN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SCRIPT-SCRIPT-PERCENT-SCALE-DOWN:CAPS"></a>HB_OT_MATH_CONSTANT_SCRIPT_SCRIPT_PERCENT_SCALE_DOWN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-DELIMITED-SUB-FORMULA-MIN-HEIGHT:CAPS"></a>HB_OT_MATH_CONSTANT_DELIMITED_SUB_FORMULA_MIN_HEIGHT</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-DISPLAY-OPERATOR-MIN-HEIGHT:CAPS"></a>HB_OT_MATH_CONSTANT_DISPLAY_OPERATOR_MIN_HEIGHT</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-MATH-LEADING:CAPS"></a>HB_OT_MATH_CONSTANT_MATH_LEADING</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-AXIS-HEIGHT:CAPS"></a>HB_OT_MATH_CONSTANT_AXIS_HEIGHT</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-ACCENT-BASE-HEIGHT:CAPS"></a>HB_OT_MATH_CONSTANT_ACCENT_BASE_HEIGHT</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-FLATTENED-ACCENT-BASE-HEIGHT:CAPS"></a>HB_OT_MATH_CONSTANT_FLATTENED_ACCENT_BASE_HEIGHT</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SUBSCRIPT-SHIFT-DOWN:CAPS"></a>HB_OT_MATH_CONSTANT_SUBSCRIPT_SHIFT_DOWN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SUBSCRIPT-TOP-MAX:CAPS"></a>HB_OT_MATH_CONSTANT_SUBSCRIPT_TOP_MAX</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SUBSCRIPT-BASELINE-DROP-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_SUBSCRIPT_BASELINE_DROP_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SUPERSCRIPT-SHIFT-UP:CAPS"></a>HB_OT_MATH_CONSTANT_SUPERSCRIPT_SHIFT_UP</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SUPERSCRIPT-SHIFT-UP-CRAMPED:CAPS"></a>HB_OT_MATH_CONSTANT_SUPERSCRIPT_SHIFT_UP_CRAMPED</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SUPERSCRIPT-BOTTOM-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_SUPERSCRIPT_BOTTOM_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SUPERSCRIPT-BASELINE-DROP-MAX:CAPS"></a>HB_OT_MATH_CONSTANT_SUPERSCRIPT_BASELINE_DROP_MAX</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SUB-SUPERSCRIPT-GAP-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_SUB_SUPERSCRIPT_GAP_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SUPERSCRIPT-BOTTOM-MAX-WITH-SUBSCRIPT:CAPS"></a>HB_OT_MATH_CONSTANT_SUPERSCRIPT_BOTTOM_MAX_WITH_SUBSCRIPT</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SPACE-AFTER-SCRIPT:CAPS"></a>HB_OT_MATH_CONSTANT_SPACE_AFTER_SCRIPT</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-UPPER-LIMIT-GAP-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_UPPER_LIMIT_GAP_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-UPPER-LIMIT-BASELINE-RISE-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_UPPER_LIMIT_BASELINE_RISE_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-LOWER-LIMIT-GAP-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_LOWER_LIMIT_GAP_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-LOWER-LIMIT-BASELINE-DROP-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_LOWER_LIMIT_BASELINE_DROP_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-STACK-TOP-SHIFT-UP:CAPS"></a>HB_OT_MATH_CONSTANT_STACK_TOP_SHIFT_UP</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-STACK-TOP-DISPLAY-STYLE-SHIFT-UP:CAPS"></a>HB_OT_MATH_CONSTANT_STACK_TOP_DISPLAY_STYLE_SHIFT_UP</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-STACK-BOTTOM-SHIFT-DOWN:CAPS"></a>HB_OT_MATH_CONSTANT_STACK_BOTTOM_SHIFT_DOWN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-STACK-BOTTOM-DISPLAY-STYLE-SHIFT-DOWN:CAPS"></a>HB_OT_MATH_CONSTANT_STACK_BOTTOM_DISPLAY_STYLE_SHIFT_DOWN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-STACK-GAP-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_STACK_GAP_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-STACK-DISPLAY-STYLE-GAP-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_STACK_DISPLAY_STYLE_GAP_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-STRETCH-STACK-TOP-SHIFT-UP:CAPS"></a>HB_OT_MATH_CONSTANT_STRETCH_STACK_TOP_SHIFT_UP</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-STRETCH-STACK-BOTTOM-SHIFT-DOWN:CAPS"></a>HB_OT_MATH_CONSTANT_STRETCH_STACK_BOTTOM_SHIFT_DOWN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-STRETCH-STACK-GAP-ABOVE-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_STRETCH_STACK_GAP_ABOVE_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-STRETCH-STACK-GAP-BELOW-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_STRETCH_STACK_GAP_BELOW_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-FRACTION-NUMERATOR-SHIFT-UP:CAPS"></a>HB_OT_MATH_CONSTANT_FRACTION_NUMERATOR_SHIFT_UP</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-FRACTION-NUMERATOR-DISPLAY-STYLE-SHIFT-UP:CAPS"></a>HB_OT_MATH_CONSTANT_FRACTION_NUMERATOR_DISPLAY_STYLE_SHIFT_UP</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-FRACTION-DENOMINATOR-SHIFT-DOWN:CAPS"></a>HB_OT_MATH_CONSTANT_FRACTION_DENOMINATOR_SHIFT_DOWN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-FRACTION-DENOMINATOR-DISPLAY-STYLE-SHIFT-DOWN:CAPS"></a>HB_OT_MATH_CONSTANT_FRACTION_DENOMINATOR_DISPLAY_STYLE_SHIFT_DOWN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-FRACTION-NUMERATOR-GAP-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_FRACTION_NUMERATOR_GAP_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-FRACTION-NUM-DISPLAY-STYLE-GAP-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_FRACTION_NUM_DISPLAY_STYLE_GAP_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-FRACTION-RULE-THICKNESS:CAPS"></a>HB_OT_MATH_CONSTANT_FRACTION_RULE_THICKNESS</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-FRACTION-DENOMINATOR-GAP-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_FRACTION_DENOMINATOR_GAP_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-FRACTION-DENOM-DISPLAY-STYLE-GAP-MIN:CAPS"></a>HB_OT_MATH_CONSTANT_FRACTION_DENOM_DISPLAY_STYLE_GAP_MIN</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SKEWED-FRACTION-HORIZONTAL-GAP:CAPS"></a>HB_OT_MATH_CONSTANT_SKEWED_FRACTION_HORIZONTAL_GAP</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-SKEWED-FRACTION-VERTICAL-GAP:CAPS"></a>HB_OT_MATH_CONSTANT_SKEWED_FRACTION_VERTICAL_GAP</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-OVERBAR-VERTICAL-GAP:CAPS"></a>HB_OT_MATH_CONSTANT_OVERBAR_VERTICAL_GAP</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-OVERBAR-RULE-THICKNESS:CAPS"></a>HB_OT_MATH_CONSTANT_OVERBAR_RULE_THICKNESS</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-OVERBAR-EXTRA-ASCENDER:CAPS"></a>HB_OT_MATH_CONSTANT_OVERBAR_EXTRA_ASCENDER</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-UNDERBAR-VERTICAL-GAP:CAPS"></a>HB_OT_MATH_CONSTANT_UNDERBAR_VERTICAL_GAP</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-UNDERBAR-RULE-THICKNESS:CAPS"></a>HB_OT_MATH_CONSTANT_UNDERBAR_RULE_THICKNESS</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-UNDERBAR-EXTRA-DESCENDER:CAPS"></a>HB_OT_MATH_CONSTANT_UNDERBAR_EXTRA_DESCENDER</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-RADICAL-VERTICAL-GAP:CAPS"></a>HB_OT_MATH_CONSTANT_RADICAL_VERTICAL_GAP</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-RADICAL-DISPLAY-STYLE-VERTICAL-GAP:CAPS"></a>HB_OT_MATH_CONSTANT_RADICAL_DISPLAY_STYLE_VERTICAL_GAP</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-RADICAL-RULE-THICKNESS:CAPS"></a>HB_OT_MATH_CONSTANT_RADICAL_RULE_THICKNESS</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-RADICAL-EXTRA-ASCENDER:CAPS"></a>HB_OT_MATH_CONSTANT_RADICAL_EXTRA_ASCENDER</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-RADICAL-KERN-BEFORE-DEGREE:CAPS"></a>HB_OT_MATH_CONSTANT_RADICAL_KERN_BEFORE_DEGREE</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-RADICAL-KERN-AFTER-DEGREE:CAPS"></a>HB_OT_MATH_CONSTANT_RADICAL_KERN_AFTER_DEGREE</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-RADICAL-DEGREE-BOTTOM-RAISE-PERCENT:CAPS"></a>HB_OT_MATH_CONSTANT_RADICAL_DEGREE_BOTTOM_RAISE_PERCENT</p></td> <td> </td> <td> </td> </tr> </tbody> </table></div> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-kern-t"></a><h3>enum hb_ot_math_kern_t</h3> <p>The math kerning-table types defined for the four corners of a glyph.</p> <div class="refsect3"> <a name="hb-ot-math-kern-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-MATH-KERN-TOP-RIGHT:CAPS"></a>HB_OT_MATH_KERN_TOP_RIGHT</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-KERN-TOP-LEFT:CAPS"></a>HB_OT_MATH_KERN_TOP_LEFT</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-KERN-BOTTOM-RIGHT:CAPS"></a>HB_OT_MATH_KERN_BOTTOM_RIGHT</p></td> <td> </td> <td> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-MATH-KERN-BOTTOM-LEFT:CAPS"></a>HB_OT_MATH_KERN_BOTTOM_LEFT</p></td> <td> </td> <td> </td> </tr> </tbody> </table></div> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-glyph-variant-t"></a><h3>hb_ot_math_glyph_variant_t</h3> <pre class="programlisting">typedef struct { hb_codepoint_t glyph; hb_position_t advance; } hb_ot_math_glyph_variant_t; </pre> <p>Data type to hold math-variant information for a glyph.</p> <div class="refsect3"> <a name="hb-ot-math-glyph-variant-t.members"></a><h4>Members</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="300px" class="struct_members_name"> <col class="struct_members_description"> <col width="200px" class="struct_members_annotations"> </colgroup> <tbody> <tr> <td class="struct_member_name"><p><a class="link" href="harfbuzz-hb-common.html#hb-codepoint-t" title="hb_codepoint_t"><span class="type">hb_codepoint_t</span></a> <em class="structfield"><code><a name="hb-ot-math-glyph-variant-t.glyph"></a>glyph</code></em>;</p></td> <td class="struct_member_description"><p>The glyph index of the variant</p></td> <td class="struct_member_annotations"> </td> </tr> <tr> <td class="struct_member_name"><p><a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="type">hb_position_t</span></a> <em class="structfield"><code><a name="hb-ot-math-glyph-variant-t.advance"></a>advance</code></em>;</p></td> <td class="struct_member_description"><p>The advance width of the variant</p></td> <td class="struct_member_annotations"> </td> </tr> </tbody> </table></div> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-glyph-part-flags-t"></a><h3>enum hb_ot_math_glyph_part_flags_t</h3> <p>Flags for math glyph parts.</p> <div class="refsect3"> <a name="hb-ot-math-glyph-part-flags-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-MATH-GLYPH-PART-FLAG-EXTENDER:CAPS"></a>HB_OT_MATH_GLYPH_PART_FLAG_EXTENDER</p></td> <td> </td> <td> </td> </tr></tbody> </table></div> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-math-glyph-part-t"></a><h3>hb_ot_math_glyph_part_t</h3> <pre class="programlisting">typedef struct { hb_codepoint_t glyph; hb_position_t start_connector_length; hb_position_t end_connector_length; hb_position_t full_advance; hb_ot_math_glyph_part_flags_t flags; } hb_ot_math_glyph_part_t; </pre> <p>Data type to hold information for a "part" component of a math-variant glyph. Large variants for stretchable math glyphs (such as parentheses) can be constructed on the fly from parts.</p> <div class="refsect3"> <a name="hb-ot-math-glyph-part-t.members"></a><h4>Members</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="300px" class="struct_members_name"> <col class="struct_members_description"> <col width="200px" class="struct_members_annotations"> </colgroup> <tbody> <tr> <td class="struct_member_name"><p><a class="link" href="harfbuzz-hb-common.html#hb-codepoint-t" title="hb_codepoint_t"><span class="type">hb_codepoint_t</span></a> <em class="structfield"><code><a name="hb-ot-math-glyph-part-t.glyph"></a>glyph</code></em>;</p></td> <td class="struct_member_description"><p>The glyph index of the variant part</p></td> <td class="struct_member_annotations"> </td> </tr> <tr> <td class="struct_member_name"><p><a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="type">hb_position_t</span></a> <em class="structfield"><code><a name="hb-ot-math-glyph-part-t.start-connector-length"></a>start_connector_length</code></em>;</p></td> <td class="struct_member_description"><p>The length of the connector on the starting side of the variant part</p></td> <td class="struct_member_annotations"> </td> </tr> <tr> <td class="struct_member_name"><p><a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="type">hb_position_t</span></a> <em class="structfield"><code><a name="hb-ot-math-glyph-part-t.end-connector-length"></a>end_connector_length</code></em>;</p></td> <td class="struct_member_description"><p>The length of the connector on the ending side of the variant part</p></td> <td class="struct_member_annotations"> </td> </tr> <tr> <td class="struct_member_name"><p><a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="type">hb_position_t</span></a> <em class="structfield"><code><a name="hb-ot-math-glyph-part-t.full-advance"></a>full_advance</code></em>;</p></td> <td class="struct_member_description"><p>The total advance of the part</p></td> <td class="struct_member_annotations"> </td> </tr> <tr> <td class="struct_member_name"><p><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-part-flags-t" title="enum hb_ot_math_glyph_part_flags_t"><span class="type">hb_ot_math_glyph_part_flags_t</span></a> <em class="structfield"><code><a name="hb-ot-math-glyph-part-t.flags"></a>flags</code></em>;</p></td> <td class="struct_member_description"><p><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-part-flags-t" title="enum hb_ot_math_glyph_part_flags_t"><span class="type">hb_ot_math_glyph_part_flags_t</span></a> flags for the part</p></td> <td class="struct_member_annotations"> </td> </tr> </tbody> </table></div> </div> <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p> </div> </div> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.32</div> </body> </html>