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  26 <div class="refentry">
  27 <a name="harfbuzz-hb-ot-math"></a><div class="titlepage"></div>
  28 <div class="refnamediv"><table width="100%"><tr>
  29 <td valign="top">
  30 <h2><span class="refentrytitle"><a name="harfbuzz-hb-ot-math.top_of_page"></a>hb-ot-math</span></h2>
  31 <p>hb-ot-math — OpenType Math information</p>
  32 </td>
  33 <td class="gallery_image" valign="top" align="right"></td>
  34 </tr></table></div>
  35 <div class="refsect1">
  36 <a name="harfbuzz-hb-ot-math.functions"></a><h2>Functions</h2>
  37 <div class="informaltable"><table class="informaltable" width="100%" border="0">
  38 <colgroup>
  39 <col width="150px" class="functions_return">
  40 <col class="functions_name">
  41 </colgroup>
  42 <tbody>
  43 <tr>
  44 <td class="function_type">
  45 <a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
  46 </td>
  47 <td class="function_name">
  48 <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>
  49 </td>
  50 </tr>
  51 <tr>
  52 <td class="function_type">
  53 <a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
  54 </td>
  55 <td class="function_name">
  56 <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>
  57 </td>
  58 </tr>
  59 <tr>
  60 <td class="function_type">
  61 <a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
  62 </td>
  63 <td class="function_name">
  64 <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>
  65 </td>
  66 </tr>
  67 <tr>
  68 <td class="function_type">
  69 <a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
  70 </td>
  71 <td class="function_name">
  72 <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>
  73 </td>
  74 </tr>
  75 <tr>
  76 <td class="function_type">
  77 <a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
  78 </td>
  79 <td class="function_name">
  80 <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>
  81 </td>
  82 </tr>
  83 <tr>
  84 <td class="function_type">
  85 <a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
  86 </td>
  87 <td class="function_name">
  88 <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>
  89 </td>
  90 </tr>
  91 <tr>
  92 <td class="function_type">unsigned <span class="returnvalue">int</span>
  93 </td>
  94 <td class="function_name">
  95 <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>
  96 </td>
  97 </tr>
  98 <tr>
  99 <td class="function_type">
 100 <a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
 101 </td>
 102 <td class="function_name">
 103 <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>
 104 </td>
 105 </tr>
 106 <tr>
 107 <td class="function_type">unsigned <span class="returnvalue">int</span>
 108 </td>
 109 <td class="function_name">
 110 <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>
 111 </td>
 112 </tr>
 113 </tbody>
 114 </table></div>
 115 </div>
 116 <a name="hb-ot-math-glyph-variant-t"></a><a name="hb-ot-math-glyph-part-t"></a><div class="refsect1">
 117 <a name="harfbuzz-hb-ot-math.other"></a><h2>Types and Values</h2>
 118 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 119 <colgroup>
 120 <col width="150px" class="name">
 121 <col class="description">
 122 </colgroup>
 123 <tbody>
 124 <tr>
 125 <td class="define_keyword">#define</td>
 126 <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>
 127 </tr>
 128 <tr>
 129 <td class="define_keyword">#define</td>
 130 <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>
 131 </tr>
 132 <tr>
 133 <td class="datatype_keyword">enum</td>
 134 <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>
 135 </tr>
 136 <tr>
 137 <td class="datatype_keyword">enum</td>
 138 <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>
 139 </tr>
 140 <tr>
 141 <td class="datatype_keyword"> </td>
 142 <td class="function_name"><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-variant-t-struct" title="hb_ot_math_glyph_variant_t">hb_ot_math_glyph_variant_t</a></td>
 143 </tr>
 144 <tr>
 145 <td class="datatype_keyword">enum</td>
 146 <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>
 147 </tr>
 148 <tr>
 149 <td class="datatype_keyword"> </td>
 150 <td class="function_name"><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-part-t-struct" title="hb_ot_math_glyph_part_t">hb_ot_math_glyph_part_t</a></td>
 151 </tr>
 152 </tbody>
 153 </table></div>
 154 </div>
 155 <div class="refsect1">
 156 <a name="harfbuzz-hb-ot-math.object-hierarchy"></a><h2>Object Hierarchy</h2>
 157 <pre class="screen">    <a href="/usr/share/gtk-doc/html/gobject/gobject-Boxed-Types.html">GBoxed</a>
 158     <span class="lineart">├──</span> hb_ot_math_glyph_part_t
 159     <span class="lineart">╰──</span> hb_ot_math_glyph_variant_t
 160     <a href="/usr/share/gtk-doc/html/gobject/gobject-Enumeration-and-Flag-Types.html">GEnum</a>
 161     <span class="lineart">├──</span> hb_ot_math_constant_t
 162     <span class="lineart">╰──</span> hb_ot_math_kern_t
 163     <a href="/usr/share/gtk-doc/html/gobject/gobject-Enumeration-and-Flag-Types.html">GFlags</a>
 164     <span class="lineart">╰──</span> hb_ot_math_glyph_part_flags_t
 165 </pre>
 166 </div>
 167 <div class="refsect1">
 168 <a name="harfbuzz-hb-ot-math.includes"></a><h2>Includes</h2>
 169 <pre class="synopsis">#include &lt;hb-ot.h&gt;
 170 </pre>
 171 </div>
 172 <div class="refsect1">
 173 <a name="harfbuzz-hb-ot-math.description"></a><h2>Description</h2>
 174 <p>Functions for fetching mathematics layout data from OpenType fonts.</p>
 175 <p>HarfBuzz itself does not implement a math layout solution. The
 176 functions and types provided can be used by client programs to access
 177 the font data necessary for typesetting OpenType Math layout.</p>
 178 </div>
 179 <div class="refsect1">
 180 <a name="harfbuzz-hb-ot-math.functions_details"></a><h2>Functions</h2>
 181 <div class="refsect2">
 182 <a name="hb-ot-math-has-data"></a><h3>hb_ot_math_has_data ()</h3>
 183 <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>
 184 hb_ot_math_has_data (<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>);</pre>
 185 <p>Tests whether a face has a <code class="literal">MATH</code> table.</p>
 186 <div class="refsect3">
 187 <a name="hb-ot-math-has-data.parameters"></a><h4>Parameters</h4>
 188 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 189 <colgroup>
 190 <col width="150px" class="parameters_name">
 191 <col class="parameters_description">
 192 <col width="200px" class="parameters_annotations">
 193 </colgroup>
 194 <tbody><tr>
 195 <td class="parameter_name"><p>face</p></td>
 196 <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 test</p></td>
 197 <td class="parameter_annotations"> </td>
 198 </tr></tbody>
 199 </table></div>
 200 </div>
 201 <div class="refsect3">
 202 <a name="hb-ot-math-has-data.returns"></a><h4>Returns</h4>
 203 <p> true if the table is found, false otherwise</p>
 204 </div>
 205 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 206 </div>
 207 <hr>
 208 <div class="refsect2">
 209 <a name="hb-ot-math-get-constant"></a><h3>hb_ot_math_get_constant ()</h3>
 210 <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>
 211 hb_ot_math_get_constant (<em class="parameter"><code><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> *font</code></em>,
 212                          <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>
 213 <p>Fetches the specified math constant. For most constants, the value returned
 214 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>
 215 <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>,
 216 <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
 217 <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
 218 an integer between 0 and 100 representing that percentage.</p>
 219 <div class="refsect3">
 220 <a name="hb-ot-math-get-constant.parameters"></a><h4>Parameters</h4>
 221 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 222 <colgroup>
 223 <col width="150px" class="parameters_name">
 224 <col class="parameters_description">
 225 <col width="200px" class="parameters_annotations">
 226 </colgroup>
 227 <tbody>
 228 <tr>
 229 <td class="parameter_name"><p>font</p></td>
 230 <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> to work upon</p></td>
 231 <td class="parameter_annotations"> </td>
 232 </tr>
 233 <tr>
 234 <td class="parameter_name"><p>constant</p></td>
 235 <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>
 236 <td class="parameter_annotations"> </td>
 237 </tr>
 238 </tbody>
 239 </table></div>
 240 </div>
 241 <div class="refsect3">
 242 <a name="hb-ot-math-get-constant.returns"></a><h4>Returns</h4>
 243 <p> the requested constant or zero</p>
 244 </div>
 245 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 246 </div>
 247 <hr>
 248 <div class="refsect2">
 249 <a name="hb-ot-math-get-glyph-italics-correction"></a><h3>hb_ot_math_get_glyph_italics_correction ()</h3>
 250 <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>
 251 hb_ot_math_get_glyph_italics_correction
 252                                (<em class="parameter"><code><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> *font</code></em>,
 253                                 <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>
 254 <p>Fetches an italics-correction value (if one exists) for the specified
 255 glyph index.</p>
 256 <div class="refsect3">
 257 <a name="hb-ot-math-get-glyph-italics-correction.parameters"></a><h4>Parameters</h4>
 258 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 259 <colgroup>
 260 <col width="150px" class="parameters_name">
 261 <col class="parameters_description">
 262 <col width="200px" class="parameters_annotations">
 263 </colgroup>
 264 <tbody>
 265 <tr>
 266 <td class="parameter_name"><p>font</p></td>
 267 <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> to work upon</p></td>
 268 <td class="parameter_annotations"> </td>
 269 </tr>
 270 <tr>
 271 <td class="parameter_name"><p>glyph</p></td>
 272 <td class="parameter_description"><p>The glyph index from which to retrieve the value</p></td>
 273 <td class="parameter_annotations"> </td>
 274 </tr>
 275 </tbody>
 276 </table></div>
 277 </div>
 278 <div class="refsect3">
 279 <a name="hb-ot-math-get-glyph-italics-correction.returns"></a><h4>Returns</h4>
 280 <p> the italics correction of the glyph or zero</p>
 281 </div>
 282 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 283 </div>
 284 <hr>
 285 <div class="refsect2">
 286 <a name="hb-ot-math-get-glyph-top-accent-attachment"></a><h3>hb_ot_math_get_glyph_top_accent_attachment ()</h3>
 287 <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>
 288 hb_ot_math_get_glyph_top_accent_attachment
 289                                (<em class="parameter"><code><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> *font</code></em>,
 290                                 <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>
 291 <p>Fetches a top-accent-attachment value (if one exists) for the specified
 292 glyph index.</p>
 293 <p>For any glyph that does not have a top-accent-attachment value - that is,
 294 a glyph not covered by the <code class="literal">MathTopAccentAttachment</code> table (or, when
 295 <em class="parameter"><code>font</code></em>
 296  has no <code class="literal">MathTopAccentAttachment</code> table or no <code class="literal">MATH</code> table, any
 297 glyph) - the function synthesizes a value, returning the position at
 298 one-half the glyph's advance width.</p>
 299 <div class="refsect3">
 300 <a name="hb-ot-math-get-glyph-top-accent-attachment.parameters"></a><h4>Parameters</h4>
 301 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 302 <colgroup>
 303 <col width="150px" class="parameters_name">
 304 <col class="parameters_description">
 305 <col width="200px" class="parameters_annotations">
 306 </colgroup>
 307 <tbody>
 308 <tr>
 309 <td class="parameter_name"><p>font</p></td>
 310 <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> to work upon</p></td>
 311 <td class="parameter_annotations"> </td>
 312 </tr>
 313 <tr>
 314 <td class="parameter_name"><p>glyph</p></td>
 315 <td class="parameter_description"><p>The glyph index from which to retrieve the value</p></td>
 316 <td class="parameter_annotations"> </td>
 317 </tr>
 318 </tbody>
 319 </table></div>
 320 </div>
 321 <div class="refsect3">
 322 <a name="hb-ot-math-get-glyph-top-accent-attachment.returns"></a><h4>Returns</h4>
 323 <p> the top accent attachment of the glyph or 0.5 * the advance
 324 width of <em class="parameter"><code>glyph</code></em>
 325 </p>
 326 </div>
 327 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 328 </div>
 329 <hr>
 330 <div class="refsect2">
 331 <a name="hb-ot-math-get-glyph-kerning"></a><h3>hb_ot_math_get_glyph_kerning ()</h3>
 332 <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>
 333 hb_ot_math_get_glyph_kerning (<em class="parameter"><code><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> *font</code></em>,
 334                               <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>,
 335                               <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>,
 336                               <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>
 337 <p>Fetches the math kerning (cut-ins) value for the specified font, glyph index, and
 338 <em class="parameter"><code>kern</code></em>
 339 . </p>
 340 <p>If the MathKern table is found, the function examines it to find a height
 341 value that is greater or equal to <em class="parameter"><code>correction_height</code></em>
 342 . If such a height
 343 value is found, corresponding kerning value from the table is returned. If
 344 no such height value is found, the last kerning value is returned.</p>
 345 <div class="refsect3">
 346 <a name="hb-ot-math-get-glyph-kerning.parameters"></a><h4>Parameters</h4>
 347 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 348 <colgroup>
 349 <col width="150px" class="parameters_name">
 350 <col class="parameters_description">
 351 <col width="200px" class="parameters_annotations">
 352 </colgroup>
 353 <tbody>
 354 <tr>
 355 <td class="parameter_name"><p>font</p></td>
 356 <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> to work upon</p></td>
 357 <td class="parameter_annotations"> </td>
 358 </tr>
 359 <tr>
 360 <td class="parameter_name"><p>glyph</p></td>
 361 <td class="parameter_description"><p>The glyph index from which to retrieve the value</p></td>
 362 <td class="parameter_annotations"> </td>
 363 </tr>
 364 <tr>
 365 <td class="parameter_name"><p>kern</p></td>
 366 <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>
 367 <td class="parameter_annotations"> </td>
 368 </tr>
 369 <tr>
 370 <td class="parameter_name"><p>correction_height</p></td>
 371 <td class="parameter_description"><p>the correction height to use to determine the kerning.</p></td>
 372 <td class="parameter_annotations"> </td>
 373 </tr>
 374 </tbody>
 375 </table></div>
 376 </div>
 377 <div class="refsect3">
 378 <a name="hb-ot-math-get-glyph-kerning.returns"></a><h4>Returns</h4>
 379 <p> requested kerning value or zero</p>
 380 </div>
 381 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 382 </div>
 383 <hr>
 384 <div class="refsect2">
 385 <a name="hb-ot-math-is-glyph-extended-shape"></a><h3>hb_ot_math_is_glyph_extended_shape ()</h3>
 386 <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>
 387 hb_ot_math_is_glyph_extended_shape (<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>,
 388                                     <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>
 389 <p>Tests whether the given glyph index is an extended shape in the face.</p>
 390 <div class="refsect3">
 391 <a name="hb-ot-math-is-glyph-extended-shape.parameters"></a><h4>Parameters</h4>
 392 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 393 <colgroup>
 394 <col width="150px" class="parameters_name">
 395 <col class="parameters_description">
 396 <col width="200px" class="parameters_annotations">
 397 </colgroup>
 398 <tbody>
 399 <tr>
 400 <td class="parameter_name"><p>face</p></td>
 401 <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>
 402 <td class="parameter_annotations"> </td>
 403 </tr>
 404 <tr>
 405 <td class="parameter_name"><p>glyph</p></td>
 406 <td class="parameter_description"><p>The glyph index to test</p></td>
 407 <td class="parameter_annotations"> </td>
 408 </tr>
 409 </tbody>
 410 </table></div>
 411 </div>
 412 <div class="refsect3">
 413 <a name="hb-ot-math-is-glyph-extended-shape.returns"></a><h4>Returns</h4>
 414 <p> true if the glyph is an extended shape, false otherwise</p>
 415 </div>
 416 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 417 </div>
 418 <hr>
 419 <div class="refsect2">
 420 <a name="hb-ot-math-get-glyph-variants"></a><h3>hb_ot_math_get_glyph_variants ()</h3>
 421 <pre class="programlisting">unsigned <span class="returnvalue">int</span>
 422 hb_ot_math_get_glyph_variants (<em class="parameter"><code><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> *font</code></em>,
 423                                <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>,
 424                                <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>,
 425                                <em class="parameter"><code>unsigned <span class="type">int</span> start_offset</code></em>,
 426                                <em class="parameter"><code>unsigned <span class="type">int</span> *variants_count</code></em>,
 427                                <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-variant-t"><span class="type">hb_ot_math_glyph_variant_t</span></a> *variants</code></em>);</pre>
 428 <p>Fetches the MathGlyphConstruction for the specified font, glyph index, and
 429 direction. The corresponding list of size variants is returned as a list of
 430 <a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-variant-t"><span class="type">hb_ot_math_glyph_variant_t</span></a> structs.</p>
 431 <div class="note">The <em class="parameter"><code>direction</code></em> parameter is only used to select between horizontal
 432 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>
 433 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
 434 considered.</div>
 435 <div class="refsect3">
 436 <a name="hb-ot-math-get-glyph-variants.parameters"></a><h4>Parameters</h4>
 437 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 438 <colgroup>
 439 <col width="150px" class="parameters_name">
 440 <col class="parameters_description">
 441 <col width="200px" class="parameters_annotations">
 442 </colgroup>
 443 <tbody>
 444 <tr>
 445 <td class="parameter_name"><p>font</p></td>
 446 <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> to work upon</p></td>
 447 <td class="parameter_annotations"> </td>
 448 </tr>
 449 <tr>
 450 <td class="parameter_name"><p>glyph</p></td>
 451 <td class="parameter_description"><p>The index of the glyph to stretch</p></td>
 452 <td class="parameter_annotations"> </td>
 453 </tr>
 454 <tr>
 455 <td class="parameter_name"><p>direction</p></td>
 456 <td class="parameter_description"><p>The direction of the stretching (horizontal or vertical)</p></td>
 457 <td class="parameter_annotations"> </td>
 458 </tr>
 459 <tr>
 460 <td class="parameter_name"><p>start_offset</p></td>
 461 <td class="parameter_description"><p>offset of the first variant to retrieve</p></td>
 462 <td class="parameter_annotations"> </td>
 463 </tr>
 464 <tr>
 465 <td class="parameter_name"><p>variants_count</p></td>
 466 <td class="parameter_description"><p>Input = the maximum number of variants to return;
 467 Output = the actual number of variants returned. </p></td>
 468 <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>
 469 </tr>
 470 <tr>
 471 <td class="parameter_name"><p>variants</p></td>
 472 <td class="parameter_description"><p>array of variants returned. </p></td>
 473 <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>
 474 </tr>
 475 </tbody>
 476 </table></div>
 477 </div>
 478 <div class="refsect3">
 479 <a name="hb-ot-math-get-glyph-variants.returns"></a><h4>Returns</h4>
 480 <p> the total number of size variants available or zero</p>
 481 </div>
 482 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 483 </div>
 484 <hr>
 485 <div class="refsect2">
 486 <a name="hb-ot-math-get-min-connector-overlap"></a><h3>hb_ot_math_get_min_connector_overlap ()</h3>
 487 <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>
 488 hb_ot_math_get_min_connector_overlap (<em class="parameter"><code><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> *font</code></em>,
 489                                       <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>
 490 <p>Fetches the MathVariants table for the specified font and returns the
 491 minimum overlap of connecting glyphs that are required to draw a glyph
 492 assembly in the specified direction.</p>
 493 <div class="note">The <em class="parameter"><code>direction</code></em> parameter is only used to select between horizontal
 494 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>
 495 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
 496 considered.</div>
 497 <div class="refsect3">
 498 <a name="hb-ot-math-get-min-connector-overlap.parameters"></a><h4>Parameters</h4>
 499 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 500 <colgroup>
 501 <col width="150px" class="parameters_name">
 502 <col class="parameters_description">
 503 <col width="200px" class="parameters_annotations">
 504 </colgroup>
 505 <tbody>
 506 <tr>
 507 <td class="parameter_name"><p>font</p></td>
 508 <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> to work upon</p></td>
 509 <td class="parameter_annotations"> </td>
 510 </tr>
 511 <tr>
 512 <td class="parameter_name"><p>direction</p></td>
 513 <td class="parameter_description"><p>direction of the stretching (horizontal or vertical)</p></td>
 514 <td class="parameter_annotations"> </td>
 515 </tr>
 516 </tbody>
 517 </table></div>
 518 </div>
 519 <div class="refsect3">
 520 <a name="hb-ot-math-get-min-connector-overlap.returns"></a><h4>Returns</h4>
 521 <p> requested minimum connector overlap or zero</p>
 522 </div>
 523 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 524 </div>
 525 <hr>
 526 <div class="refsect2">
 527 <a name="hb-ot-math-get-glyph-assembly"></a><h3>hb_ot_math_get_glyph_assembly ()</h3>
 528 <pre class="programlisting">unsigned <span class="returnvalue">int</span>
 529 hb_ot_math_get_glyph_assembly (<em class="parameter"><code><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> *font</code></em>,
 530                                <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>,
 531                                <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>,
 532                                <em class="parameter"><code>unsigned <span class="type">int</span> start_offset</code></em>,
 533                                <em class="parameter"><code>unsigned <span class="type">int</span> *parts_count</code></em>,
 534                                <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-part-t"><span class="type">hb_ot_math_glyph_part_t</span></a> *parts</code></em>,
 535                                <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>
 536 <p>Fetches the GlyphAssembly for the specified font, glyph index, and direction.
 537 Returned are a list of <a class="link" href="harfbuzz-hb-ot-math.html#hb-ot-math-glyph-part-t"><span class="type">hb_ot_math_glyph_part_t</span></a> glyph parts that can be
 538 used to draw the glyph and an italics-correction value (if one is defined
 539 in the font).</p>
 540 <div class="note">The <em class="parameter"><code>direction</code></em> parameter is only used to select between horizontal
 541 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>
 542 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
 543 considered.</div>
 544 <div class="refsect3">
 545 <a name="hb-ot-math-get-glyph-assembly.parameters"></a><h4>Parameters</h4>
 546 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 547 <colgroup>
 548 <col width="150px" class="parameters_name">
 549 <col class="parameters_description">
 550 <col width="200px" class="parameters_annotations">
 551 </colgroup>
 552 <tbody>
 553 <tr>
 554 <td class="parameter_name"><p>font</p></td>
 555 <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-font.html#hb-font-t"><span class="type">hb_font_t</span></a> to work upon</p></td>
 556 <td class="parameter_annotations"> </td>
 557 </tr>
 558 <tr>
 559 <td class="parameter_name"><p>glyph</p></td>
 560 <td class="parameter_description"><p>The index of the glyph to stretch</p></td>
 561 <td class="parameter_annotations"> </td>
 562 </tr>
 563 <tr>
 564 <td class="parameter_name"><p>direction</p></td>
 565 <td class="parameter_description"><p>direction of the stretching (horizontal or vertical)</p></td>
 566 <td class="parameter_annotations"> </td>
 567 </tr>
 568 <tr>
 569 <td class="parameter_name"><p>start_offset</p></td>
 570 <td class="parameter_description"><p>offset of the first glyph part to retrieve</p></td>
 571 <td class="parameter_annotations"> </td>
 572 </tr>
 573 <tr>
 574 <td class="parameter_name"><p>parts_count</p></td>
 575 <td class="parameter_description"><p>Input = maximum number of glyph parts to return;
 576 Output = actual number of parts returned. </p></td>
 577 <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>
 578 </tr>
 579 <tr>
 580 <td class="parameter_name"><p>parts</p></td>
 581 <td class="parameter_description"><p>the glyph parts returned. </p></td>
 582 <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>
 583 </tr>
 584 <tr>
 585 <td class="parameter_name"><p>italics_correction</p></td>
 586 <td class="parameter_description"><p>italics correction of the glyph assembly. </p></td>
 587 <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>
 588 </tr>
 589 </tbody>
 590 </table></div>
 591 </div>
 592 <div class="refsect3">
 593 <a name="hb-ot-math-get-glyph-assembly.returns"></a><h4>Returns</h4>
 594 <p> the total number of parts in the glyph assembly</p>
 595 </div>
 596 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 597 </div>
 598 </div>
 599 <div class="refsect1">
 600 <a name="harfbuzz-hb-ot-math.other_details"></a><h2>Types and Values</h2>
 601 <div class="refsect2">
 602 <a name="HB-OT-TAG-MATH:CAPS"></a><h3>HB_OT_TAG_MATH</h3>
 603 <pre class="programlisting">#define HB_OT_TAG_MATH HB_TAG('M','A','T','H')
 604 </pre>
 605 </div>
 606 <hr>
 607 <div class="refsect2">
 608 <a name="HB-OT-MATH-SCRIPT:CAPS"></a><h3>HB_OT_MATH_SCRIPT</h3>
 609 <pre class="programlisting">#define HB_OT_MATH_SCRIPT HB_TAG('m','a','t','h')
 610 </pre>
 611 </div>
 612 <hr>
 613 <div class="refsect2">
 614 <a name="hb-ot-math-constant-t"></a><h3>enum hb_ot_math_constant_t</h3>
 615 <p>The 'MATH' table constants specified at
 616 https://docs.microsoft.com/en-us/typography/opentype/spec/math</p>
 617 <div class="refsect3">
 618 <a name="hb-ot-math-constant-t.members"></a><h4>Members</h4>
 619 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 620 <colgroup>
 621 <col width="300px" class="enum_members_name">
 622 <col class="enum_members_description">
 623 <col width="200px" class="enum_members_annotations">
 624 </colgroup>
 625 <tbody>
 626 <tr>
 627 <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>
 628 <td> </td>
 629 <td> </td>
 630 </tr>
 631 <tr>
 632 <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>
 633 <td> </td>
 634 <td> </td>
 635 </tr>
 636 <tr>
 637 <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>
 638 <td> </td>
 639 <td> </td>
 640 </tr>
 641 <tr>
 642 <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>
 643 <td> </td>
 644 <td> </td>
 645 </tr>
 646 <tr>
 647 <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-MATH-LEADING:CAPS"></a>HB_OT_MATH_CONSTANT_MATH_LEADING</p></td>
 648 <td> </td>
 649 <td> </td>
 650 </tr>
 651 <tr>
 652 <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-AXIS-HEIGHT:CAPS"></a>HB_OT_MATH_CONSTANT_AXIS_HEIGHT</p></td>
 653 <td> </td>
 654 <td> </td>
 655 </tr>
 656 <tr>
 657 <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>
 658 <td> </td>
 659 <td> </td>
 660 </tr>
 661 <tr>
 662 <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>
 663 <td> </td>
 664 <td> </td>
 665 </tr>
 666 <tr>
 667 <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>
 668 <td> </td>
 669 <td> </td>
 670 </tr>
 671 <tr>
 672 <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>
 673 <td> </td>
 674 <td> </td>
 675 </tr>
 676 <tr>
 677 <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>
 678 <td> </td>
 679 <td> </td>
 680 </tr>
 681 <tr>
 682 <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>
 683 <td> </td>
 684 <td> </td>
 685 </tr>
 686 <tr>
 687 <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>
 688 <td> </td>
 689 <td> </td>
 690 </tr>
 691 <tr>
 692 <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>
 693 <td> </td>
 694 <td> </td>
 695 </tr>
 696 <tr>
 697 <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>
 698 <td> </td>
 699 <td> </td>
 700 </tr>
 701 <tr>
 702 <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>
 703 <td> </td>
 704 <td> </td>
 705 </tr>
 706 <tr>
 707 <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>
 708 <td> </td>
 709 <td> </td>
 710 </tr>
 711 <tr>
 712 <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>
 713 <td> </td>
 714 <td> </td>
 715 </tr>
 716 <tr>
 717 <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>
 718 <td> </td>
 719 <td> </td>
 720 </tr>
 721 <tr>
 722 <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>
 723 <td> </td>
 724 <td> </td>
 725 </tr>
 726 <tr>
 727 <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>
 728 <td> </td>
 729 <td> </td>
 730 </tr>
 731 <tr>
 732 <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>
 733 <td> </td>
 734 <td> </td>
 735 </tr>
 736 <tr>
 737 <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>
 738 <td> </td>
 739 <td> </td>
 740 </tr>
 741 <tr>
 742 <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>
 743 <td> </td>
 744 <td> </td>
 745 </tr>
 746 <tr>
 747 <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>
 748 <td> </td>
 749 <td> </td>
 750 </tr>
 751 <tr>
 752 <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>
 753 <td> </td>
 754 <td> </td>
 755 </tr>
 756 <tr>
 757 <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>
 758 <td> </td>
 759 <td> </td>
 760 </tr>
 761 <tr>
 762 <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>
 763 <td> </td>
 764 <td> </td>
 765 </tr>
 766 <tr>
 767 <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>
 768 <td> </td>
 769 <td> </td>
 770 </tr>
 771 <tr>
 772 <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>
 773 <td> </td>
 774 <td> </td>
 775 </tr>
 776 <tr>
 777 <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>
 778 <td> </td>
 779 <td> </td>
 780 </tr>
 781 <tr>
 782 <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>
 783 <td> </td>
 784 <td> </td>
 785 </tr>
 786 <tr>
 787 <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>
 788 <td> </td>
 789 <td> </td>
 790 </tr>
 791 <tr>
 792 <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>
 793 <td> </td>
 794 <td> </td>
 795 </tr>
 796 <tr>
 797 <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>
 798 <td> </td>
 799 <td> </td>
 800 </tr>
 801 <tr>
 802 <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>
 803 <td> </td>
 804 <td> </td>
 805 </tr>
 806 <tr>
 807 <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>
 808 <td> </td>
 809 <td> </td>
 810 </tr>
 811 <tr>
 812 <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>
 813 <td> </td>
 814 <td> </td>
 815 </tr>
 816 <tr>
 817 <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>
 818 <td> </td>
 819 <td> </td>
 820 </tr>
 821 <tr>
 822 <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>
 823 <td> </td>
 824 <td> </td>
 825 </tr>
 826 <tr>
 827 <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>
 828 <td> </td>
 829 <td> </td>
 830 </tr>
 831 <tr>
 832 <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>
 833 <td> </td>
 834 <td> </td>
 835 </tr>
 836 <tr>
 837 <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>
 838 <td> </td>
 839 <td> </td>
 840 </tr>
 841 <tr>
 842 <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>
 843 <td> </td>
 844 <td> </td>
 845 </tr>
 846 <tr>
 847 <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>
 848 <td> </td>
 849 <td> </td>
 850 </tr>
 851 <tr>
 852 <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>
 853 <td> </td>
 854 <td> </td>
 855 </tr>
 856 <tr>
 857 <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>
 858 <td> </td>
 859 <td> </td>
 860 </tr>
 861 <tr>
 862 <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>
 863 <td> </td>
 864 <td> </td>
 865 </tr>
 866 <tr>
 867 <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>
 868 <td> </td>
 869 <td> </td>
 870 </tr>
 871 <tr>
 872 <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>
 873 <td> </td>
 874 <td> </td>
 875 </tr>
 876 <tr>
 877 <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>
 878 <td> </td>
 879 <td> </td>
 880 </tr>
 881 <tr>
 882 <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>
 883 <td> </td>
 884 <td> </td>
 885 </tr>
 886 <tr>
 887 <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>
 888 <td> </td>
 889 <td> </td>
 890 </tr>
 891 <tr>
 892 <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>
 893 <td> </td>
 894 <td> </td>
 895 </tr>
 896 <tr>
 897 <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>
 898 <td> </td>
 899 <td> </td>
 900 </tr>
 901 <tr>
 902 <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>
 903 <td> </td>
 904 <td> </td>
 905 </tr>
 906 </tbody>
 907 </table></div>
 908 </div>
 909 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 910 </div>
 911 <hr>
 912 <div class="refsect2">
 913 <a name="hb-ot-math-kern-t"></a><h3>enum hb_ot_math_kern_t</h3>
 914 <p>The math kerning-table types defined for the four corners
 915 of a glyph.</p>
 916 <div class="refsect3">
 917 <a name="hb-ot-math-kern-t.members"></a><h4>Members</h4>
 918 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 919 <colgroup>
 920 <col width="300px" class="enum_members_name">
 921 <col class="enum_members_description">
 922 <col width="200px" class="enum_members_annotations">
 923 </colgroup>
 924 <tbody>
 925 <tr>
 926 <td class="enum_member_name"><p><a name="HB-OT-MATH-KERN-TOP-RIGHT:CAPS"></a>HB_OT_MATH_KERN_TOP_RIGHT</p></td>
 927 <td> </td>
 928 <td> </td>
 929 </tr>
 930 <tr>
 931 <td class="enum_member_name"><p><a name="HB-OT-MATH-KERN-TOP-LEFT:CAPS"></a>HB_OT_MATH_KERN_TOP_LEFT</p></td>
 932 <td> </td>
 933 <td> </td>
 934 </tr>
 935 <tr>
 936 <td class="enum_member_name"><p><a name="HB-OT-MATH-KERN-BOTTOM-RIGHT:CAPS"></a>HB_OT_MATH_KERN_BOTTOM_RIGHT</p></td>
 937 <td> </td>
 938 <td> </td>
 939 </tr>
 940 <tr>
 941 <td class="enum_member_name"><p><a name="HB-OT-MATH-KERN-BOTTOM-LEFT:CAPS"></a>HB_OT_MATH_KERN_BOTTOM_LEFT</p></td>
 942 <td> </td>
 943 <td> </td>
 944 </tr>
 945 </tbody>
 946 </table></div>
 947 </div>
 948 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 949 </div>
 950 <hr>
 951 <div class="refsect2">
 952 <a name="hb-ot-math-glyph-variant-t-struct"></a><h3>hb_ot_math_glyph_variant_t</h3>
 953 <pre class="programlisting">typedef struct {
 954   hb_codepoint_t glyph;
 955   hb_position_t advance;
 956 } hb_ot_math_glyph_variant_t;
 957 </pre>
 958 <p>Data type to hold math-variant information for a glyph.</p>
 959 <div class="refsect3">
 960 <a name="hb-ot-math-glyph-variant-t.members"></a><h4>Members</h4>
 961 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 962 <colgroup>
 963 <col width="300px" class="struct_members_name">
 964 <col class="struct_members_description">
 965 <col width="200px" class="struct_members_annotations">
 966 </colgroup>
 967 <tbody>
 968 <tr>
 969 <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-struct.glyph"></a>glyph</code></em>;</p></td>
 970 <td class="struct_member_description"><p>The glyph index of the variant</p></td>
 971 <td class="struct_member_annotations"> </td>
 972 </tr>
 973 <tr>
 974 <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-struct.advance"></a>advance</code></em>;</p></td>
 975 <td class="struct_member_description"><p>The advance width of the variant</p></td>
 976 <td class="struct_member_annotations"> </td>
 977 </tr>
 978 </tbody>
 979 </table></div>
 980 </div>
 981 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 982 </div>
 983 <hr>
 984 <div class="refsect2">
 985 <a name="hb-ot-math-glyph-part-flags-t"></a><h3>enum hb_ot_math_glyph_part_flags_t</h3>
 986 <p>Flags for math glyph parts.</p>
 987 <div class="refsect3">
 988 <a name="hb-ot-math-glyph-part-flags-t.members"></a><h4>Members</h4>
 989 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 990 <colgroup>
 991 <col width="300px" class="enum_members_name">
 992 <col class="enum_members_description">
 993 <col width="200px" class="enum_members_annotations">
 994 </colgroup>
 995 <tbody><tr>
 996 <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>
 997 <td> </td>
 998 <td> </td>
 999 </tr></tbody>
1000 </table></div>
1001 </div>
1002 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
1003 </div>
1004 <hr>
1005 <div class="refsect2">
1006 <a name="hb-ot-math-glyph-part-t-struct"></a><h3>hb_ot_math_glyph_part_t</h3>
1007 <pre class="programlisting">typedef struct {
1008   hb_codepoint_t glyph;
1009   hb_position_t start_connector_length;
1010   hb_position_t end_connector_length;
1011   hb_position_t full_advance;
1012   hb_ot_math_glyph_part_flags_t flags;
1013 } hb_ot_math_glyph_part_t;
1014 </pre>
1015 <p>Data type to hold information for a "part" component of a math-variant glyph.
1016 Large variants for stretchable math glyphs (such as parentheses) can be constructed
1017 on the fly from parts.</p>
1018 <div class="refsect3">
1019 <a name="hb-ot-math-glyph-part-t.members"></a><h4>Members</h4>
1020 <div class="informaltable"><table class="informaltable" width="100%" border="0">
1021 <colgroup>
1022 <col width="300px" class="struct_members_name">
1023 <col class="struct_members_description">
1024 <col width="200px" class="struct_members_annotations">
1025 </colgroup>
1026 <tbody>
1027 <tr>
1028 <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-struct.glyph"></a>glyph</code></em>;</p></td>
1029 <td class="struct_member_description"><p>The glyph index of the variant part</p></td>
1030 <td class="struct_member_annotations"> </td>
1031 </tr>
1032 <tr>
1033 <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-struct.start-connector-length"></a>start_connector_length</code></em>;</p></td>
1034 <td class="struct_member_description"><p>The length of the connector on the starting side of the variant part</p></td>
1035 <td class="struct_member_annotations"> </td>
1036 </tr>
1037 <tr>
1038 <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-struct.end-connector-length"></a>end_connector_length</code></em>;</p></td>
1039 <td class="struct_member_description"><p>The length of the connector on the ending side of the variant part</p></td>
1040 <td class="struct_member_annotations"> </td>
1041 </tr>
1042 <tr>
1043 <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-struct.full-advance"></a>full_advance</code></em>;</p></td>
1044 <td class="struct_member_description"><p>The total advance of the part</p></td>
1045 <td class="struct_member_annotations"> </td>
1046 </tr>
1047 <tr>
1048 <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-struct.flags"></a>flags</code></em>;</p></td>
1049 <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>
1050 <td class="struct_member_annotations"> </td>
1051 </tr>
1052 </tbody>
1053 </table></div>
1054 </div>
1055 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
1056 </div>
1057 </div>
1058 </div>
1059 <div class="footer">
1060 <hr>Generated by GTK-Doc V1.29</div>
1061 </body>
1062 </html>