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  26 <a name="harfbuzz-hb-ot-math"></a><div class="titlepage"></div>
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  28 <td valign="top">
  29 <h2><span class="refentrytitle"><a name="harfbuzz-hb-ot-math.top_of_page"></a>hb-ot-math</span></h2>
  30 <p>hb-ot-math — OpenType Math information</p>
  31 </td>
  32 <td class="gallery_image" valign="top" align="right"></td>
  33 </tr></table></div>
  34 <div class="refsect1">
  35 <a name="harfbuzz-hb-ot-math.functions"></a><h2>Functions</h2>
  36 <div class="informaltable"><table class="informaltable" width="100%" border="0">
  37 <colgroup>
  38 <col width="150px" class="functions_proto_type">
  39 <col class="functions_proto_name">
  40 </colgroup>
  41 <tbody>
  42 <tr>
  43 <td class="function_type">
  44 <a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
  45 </td>
  46 <td class="function_name">
  47 <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>
  48 </td>
  49 </tr>
  50 <tr>
  51 <td class="function_type">
  52 <a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
  53 </td>
  54 <td class="function_name">
  55 <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>
  56 </td>
  57 </tr>
  58 <tr>
  59 <td class="function_type">
  60 <a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
  61 </td>
  62 <td class="function_name">
  63 <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>
  64 </td>
  65 </tr>
  66 <tr>
  67 <td class="function_type">
  68 <a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
  69 </td>
  70 <td class="function_name">
  71 <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>
  72 </td>
  73 </tr>
  74 <tr>
  75 <td class="function_type">
  76 <a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
  77 </td>
  78 <td class="function_name">
  79 <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>
  80 </td>
  81 </tr>
  82 <tr>
  83 <td class="function_type">
  84 <a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a>
  85 </td>
  86 <td class="function_name">
  87 <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>
  88 </td>
  89 </tr>
  90 <tr>
  91 <td class="function_type">unsigned <span class="returnvalue">int</span>
  92 </td>
  93 <td class="function_name">
  94 <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>
  95 </td>
  96 </tr>
  97 <tr>
  98 <td class="function_type">
  99 <a class="link" href="harfbuzz-hb-common.html#hb-position-t" title="hb_position_t"><span class="returnvalue">hb_position_t</span></a>
 100 </td>
 101 <td class="function_name">
 102 <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>
 103 </td>
 104 </tr>
 105 <tr>
 106 <td class="function_type">unsigned <span class="returnvalue">int</span>
 107 </td>
 108 <td class="function_name">
 109 <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>
 110 </td>
 111 </tr>
 112 </tbody>
 113 </table></div>
 114 </div>
 115 <div class="refsect1">
 116 <a name="harfbuzz-hb-ot-math.other"></a><h2>Types and Values</h2>
 117 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 118 <colgroup>
 119 <col width="150px" class="other_proto_type">
 120 <col class="other_proto_name">
 121 </colgroup>
 122 <tbody>
 123 <tr>
 124 <td class="define_keyword">#define</td>
 125 <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>
 126 </tr>
 127 <tr>
 128 <td class="define_keyword">#define</td>
 129 <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>
 130 </tr>
 131 <tr>
 132 <td class="datatype_keyword">enum</td>
 133 <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>
 134 </tr>
 135 <tr>
 136 <td class="datatype_keyword">enum</td>
 137 <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>
 138 </tr>
 139 <tr>
 140 <td class="datatype_keyword"> </td>
 141 <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>
 142 </tr>
 143 <tr>
 144 <td class="datatype_keyword">enum</td>
 145 <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>
 146 </tr>
 147 <tr>
 148 <td class="datatype_keyword"> </td>
 149 <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>
 150 </tr>
 151 </tbody>
 152 </table></div>
 153 </div>
 154 <div class="refsect1">
 155 <a name="harfbuzz-hb-ot-math.includes"></a><h2>Includes</h2>
 156 <pre class="synopsis">#include &lt;hb-ot.h&gt;
 157 </pre>
 158 </div>
 159 <div class="refsect1">
 160 <a name="harfbuzz-hb-ot-math.description"></a><h2>Description</h2>
 161 <p>Functions for fetching mathematics layout data from OpenType fonts.</p>
 162 <p>HarfBuzz itself does not implement a math layout solution. The
 163 functions and types provided can be used by client programs to access
 164 the font data necessary for typesetting OpenType Math layout.</p>
 165 </div>
 166 <div class="refsect1">
 167 <a name="harfbuzz-hb-ot-math.functions_details"></a><h2>Functions</h2>
 168 <div class="refsect2">
 169 <a name="hb-ot-math-has-data"></a><h3>hb_ot_math_has_data ()</h3>
 170 <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>
 171 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>
 172 <p>Tests whether a face has a <code class="literal">MATH</code> table.</p>
 173 <div class="refsect3">
 174 <a name="hb-ot-math-has-data.parameters"></a><h4>Parameters</h4>
 175 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 176 <colgroup>
 177 <col width="150px" class="parameters_name">
 178 <col class="parameters_description">
 179 <col width="200px" class="parameters_annotations">
 180 </colgroup>
 181 <tbody><tr>
 182 <td class="parameter_name"><p>face</p></td>
 183 <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>
 184 <td class="parameter_annotations"> </td>
 185 </tr></tbody>
 186 </table></div>
 187 </div>
 188 <div class="refsect3">
 189 <a name="hb-ot-math-has-data.returns"></a><h4>Returns</h4>
 190 <p> true if the table is found, false otherwise</p>
 191 </div>
 192 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 193 </div>
 194 <hr>
 195 <div class="refsect2">
 196 <a name="hb-ot-math-get-constant"></a><h3>hb_ot_math_get_constant ()</h3>
 197 <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>
 198 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>,
 199                          <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>
 200 <p>Fetches the specified math constant. For most constants, the value returned
 201 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>
 202 <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>,
 203 <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
 204 <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
 205 an integer between 0 and 100 representing that percentage.</p>
 206 <div class="refsect3">
 207 <a name="hb-ot-math-get-constant.parameters"></a><h4>Parameters</h4>
 208 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 209 <colgroup>
 210 <col width="150px" class="parameters_name">
 211 <col class="parameters_description">
 212 <col width="200px" class="parameters_annotations">
 213 </colgroup>
 214 <tbody>
 215 <tr>
 216 <td class="parameter_name"><p>font</p></td>
 217 <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>
 218 <td class="parameter_annotations"> </td>
 219 </tr>
 220 <tr>
 221 <td class="parameter_name"><p>constant</p></td>
 222 <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>
 223 <td class="parameter_annotations"> </td>
 224 </tr>
 225 </tbody>
 226 </table></div>
 227 </div>
 228 <div class="refsect3">
 229 <a name="hb-ot-math-get-constant.returns"></a><h4>Returns</h4>
 230 <p> the requested constant or zero</p>
 231 </div>
 232 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 233 </div>
 234 <hr>
 235 <div class="refsect2">
 236 <a name="hb-ot-math-get-glyph-italics-correction"></a><h3>hb_ot_math_get_glyph_italics_correction ()</h3>
 237 <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>
 238 hb_ot_math_get_glyph_italics_correction
 239                                (<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>,
 240                                 <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>
 241 <p>Fetches an italics-correction value (if one exists) for the specified
 242 glyph index.</p>
 243 <div class="refsect3">
 244 <a name="hb-ot-math-get-glyph-italics-correction.parameters"></a><h4>Parameters</h4>
 245 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 246 <colgroup>
 247 <col width="150px" class="parameters_name">
 248 <col class="parameters_description">
 249 <col width="200px" class="parameters_annotations">
 250 </colgroup>
 251 <tbody>
 252 <tr>
 253 <td class="parameter_name"><p>font</p></td>
 254 <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>
 255 <td class="parameter_annotations"> </td>
 256 </tr>
 257 <tr>
 258 <td class="parameter_name"><p>glyph</p></td>
 259 <td class="parameter_description"><p>The glyph index from which to retrieve the value</p></td>
 260 <td class="parameter_annotations"> </td>
 261 </tr>
 262 </tbody>
 263 </table></div>
 264 </div>
 265 <div class="refsect3">
 266 <a name="hb-ot-math-get-glyph-italics-correction.returns"></a><h4>Returns</h4>
 267 <p> the italics correction of the glyph or zero</p>
 268 </div>
 269 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 270 </div>
 271 <hr>
 272 <div class="refsect2">
 273 <a name="hb-ot-math-get-glyph-top-accent-attachment"></a><h3>hb_ot_math_get_glyph_top_accent_attachment ()</h3>
 274 <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>
 275 hb_ot_math_get_glyph_top_accent_attachment
 276                                (<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>,
 277                                 <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>
 278 <p>Fetches a top-accent-attachment value (if one exists) for the specified
 279 glyph index.</p>
 280 <p>For any glyph that does not have a top-accent-attachment value - that is,
 281 a glyph not covered by the <code class="literal">MathTopAccentAttachment</code> table (or, when
 282 <em class="parameter"><code>font</code></em>
 283  has no <code class="literal">MathTopAccentAttachment</code> table or no <code class="literal">MATH</code> table, any
 284 glyph) - the function synthesizes a value, returning the position at
 285 one-half the glyph's advance width.</p>
 286 <div class="refsect3">
 287 <a name="hb-ot-math-get-glyph-top-accent-attachment.parameters"></a><h4>Parameters</h4>
 288 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 289 <colgroup>
 290 <col width="150px" class="parameters_name">
 291 <col class="parameters_description">
 292 <col width="200px" class="parameters_annotations">
 293 </colgroup>
 294 <tbody>
 295 <tr>
 296 <td class="parameter_name"><p>font</p></td>
 297 <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>
 298 <td class="parameter_annotations"> </td>
 299 </tr>
 300 <tr>
 301 <td class="parameter_name"><p>glyph</p></td>
 302 <td class="parameter_description"><p>The glyph index from which to retrieve the value</p></td>
 303 <td class="parameter_annotations"> </td>
 304 </tr>
 305 </tbody>
 306 </table></div>
 307 </div>
 308 <div class="refsect3">
 309 <a name="hb-ot-math-get-glyph-top-accent-attachment.returns"></a><h4>Returns</h4>
 310 <p> the top accent attachment of the glyph or 0.5 * the advance
 311 width of <em class="parameter"><code>glyph</code></em>
 312 </p>
 313 </div>
 314 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 315 </div>
 316 <hr>
 317 <div class="refsect2">
 318 <a name="hb-ot-math-get-glyph-kerning"></a><h3>hb_ot_math_get_glyph_kerning ()</h3>
 319 <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>
 320 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>,
 321                               <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>,
 322                               <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>,
 323                               <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>
 324 <p>Fetches the math kerning (cut-ins) value for the specified font, glyph index, and
 325 <em class="parameter"><code>kern</code></em>
 326 . </p>
 327 <p>If the MathKern table is found, the function examines it to find a height
 328 value that is greater or equal to <em class="parameter"><code>correction_height</code></em>
 329 . If such a height
 330 value is found, corresponding kerning value from the table is returned. If
 331 no such height value is found, the last kerning value is returned.</p>
 332 <div class="refsect3">
 333 <a name="hb-ot-math-get-glyph-kerning.parameters"></a><h4>Parameters</h4>
 334 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 335 <colgroup>
 336 <col width="150px" class="parameters_name">
 337 <col class="parameters_description">
 338 <col width="200px" class="parameters_annotations">
 339 </colgroup>
 340 <tbody>
 341 <tr>
 342 <td class="parameter_name"><p>font</p></td>
 343 <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>
 344 <td class="parameter_annotations"> </td>
 345 </tr>
 346 <tr>
 347 <td class="parameter_name"><p>glyph</p></td>
 348 <td class="parameter_description"><p>The glyph index from which to retrieve the value</p></td>
 349 <td class="parameter_annotations"> </td>
 350 </tr>
 351 <tr>
 352 <td class="parameter_name"><p>kern</p></td>
 353 <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>
 354 <td class="parameter_annotations"> </td>
 355 </tr>
 356 <tr>
 357 <td class="parameter_name"><p>correction_height</p></td>
 358 <td class="parameter_description"><p>the correction height to use to determine the kerning.</p></td>
 359 <td class="parameter_annotations"> </td>
 360 </tr>
 361 </tbody>
 362 </table></div>
 363 </div>
 364 <div class="refsect3">
 365 <a name="hb-ot-math-get-glyph-kerning.returns"></a><h4>Returns</h4>
 366 <p> requested kerning value or zero</p>
 367 </div>
 368 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 369 </div>
 370 <hr>
 371 <div class="refsect2">
 372 <a name="hb-ot-math-is-glyph-extended-shape"></a><h3>hb_ot_math_is_glyph_extended_shape ()</h3>
 373 <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>
 374 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>,
 375                                     <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>
 376 <p>Tests whether the given glyph index is an extended shape in the face.</p>
 377 <div class="refsect3">
 378 <a name="hb-ot-math-is-glyph-extended-shape.parameters"></a><h4>Parameters</h4>
 379 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 380 <colgroup>
 381 <col width="150px" class="parameters_name">
 382 <col class="parameters_description">
 383 <col width="200px" class="parameters_annotations">
 384 </colgroup>
 385 <tbody>
 386 <tr>
 387 <td class="parameter_name"><p>face</p></td>
 388 <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>
 389 <td class="parameter_annotations"> </td>
 390 </tr>
 391 <tr>
 392 <td class="parameter_name"><p>glyph</p></td>
 393 <td class="parameter_description"><p>The glyph index to test</p></td>
 394 <td class="parameter_annotations"> </td>
 395 </tr>
 396 </tbody>
 397 </table></div>
 398 </div>
 399 <div class="refsect3">
 400 <a name="hb-ot-math-is-glyph-extended-shape.returns"></a><h4>Returns</h4>
 401 <p> true if the glyph is an extended shape, false otherwise</p>
 402 </div>
 403 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 404 </div>
 405 <hr>
 406 <div class="refsect2">
 407 <a name="hb-ot-math-get-glyph-variants"></a><h3>hb_ot_math_get_glyph_variants ()</h3>
 408 <pre class="programlisting">unsigned <span class="returnvalue">int</span>
 409 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>,
 410                                <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>,
 411                                <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>,
 412                                <em class="parameter"><code>unsigned <span class="type">int</span> start_offset</code></em>,
 413                                <em class="parameter"><code>unsigned <span class="type">int</span> *variants_count</code></em>,
 414                                <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>
 415 <p>Fetches the MathGlyphConstruction for the specified font, glyph index, and
 416 direction. The corresponding list of size variants is returned as a list of
 417 <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>
 418 <div class="note">The <em class="parameter"><code>direction</code></em> parameter is only used to select between horizontal
 419 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>
 420 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
 421 considered.</div>
 422 <div class="refsect3">
 423 <a name="hb-ot-math-get-glyph-variants.parameters"></a><h4>Parameters</h4>
 424 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 425 <colgroup>
 426 <col width="150px" class="parameters_name">
 427 <col class="parameters_description">
 428 <col width="200px" class="parameters_annotations">
 429 </colgroup>
 430 <tbody>
 431 <tr>
 432 <td class="parameter_name"><p>font</p></td>
 433 <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>
 434 <td class="parameter_annotations"> </td>
 435 </tr>
 436 <tr>
 437 <td class="parameter_name"><p>glyph</p></td>
 438 <td class="parameter_description"><p>The index of the glyph to stretch</p></td>
 439 <td class="parameter_annotations"> </td>
 440 </tr>
 441 <tr>
 442 <td class="parameter_name"><p>direction</p></td>
 443 <td class="parameter_description"><p>The direction of the stretching (horizontal or vertical)</p></td>
 444 <td class="parameter_annotations"> </td>
 445 </tr>
 446 <tr>
 447 <td class="parameter_name"><p>start_offset</p></td>
 448 <td class="parameter_description"><p>offset of the first variant to retrieve</p></td>
 449 <td class="parameter_annotations"> </td>
 450 </tr>
 451 <tr>
 452 <td class="parameter_name"><p>variants_count</p></td>
 453 <td class="parameter_description"><p>Input = the maximum number of variants to return;
 454 Output = the actual number of variants returned. </p></td>
 455 <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>
 456 </tr>
 457 <tr>
 458 <td class="parameter_name"><p>variants</p></td>
 459 <td class="parameter_description"><p>array of variants returned. </p></td>
 460 <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>
 461 </tr>
 462 </tbody>
 463 </table></div>
 464 </div>
 465 <div class="refsect3">
 466 <a name="hb-ot-math-get-glyph-variants.returns"></a><h4>Returns</h4>
 467 <p> the total number of size variants available or zero</p>
 468 </div>
 469 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 470 </div>
 471 <hr>
 472 <div class="refsect2">
 473 <a name="hb-ot-math-get-min-connector-overlap"></a><h3>hb_ot_math_get_min_connector_overlap ()</h3>
 474 <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>
 475 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>,
 476                                       <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>
 477 <p>Fetches the MathVariants table for the specified font and returns the
 478 minimum overlap of connecting glyphs that are required to draw a glyph
 479 assembly in the specified direction.</p>
 480 <div class="note">The <em class="parameter"><code>direction</code></em> parameter is only used to select between horizontal
 481 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>
 482 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
 483 considered.</div>
 484 <div class="refsect3">
 485 <a name="hb-ot-math-get-min-connector-overlap.parameters"></a><h4>Parameters</h4>
 486 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 487 <colgroup>
 488 <col width="150px" class="parameters_name">
 489 <col class="parameters_description">
 490 <col width="200px" class="parameters_annotations">
 491 </colgroup>
 492 <tbody>
 493 <tr>
 494 <td class="parameter_name"><p>font</p></td>
 495 <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>
 496 <td class="parameter_annotations"> </td>
 497 </tr>
 498 <tr>
 499 <td class="parameter_name"><p>direction</p></td>
 500 <td class="parameter_description"><p>direction of the stretching (horizontal or vertical)</p></td>
 501 <td class="parameter_annotations"> </td>
 502 </tr>
 503 </tbody>
 504 </table></div>
 505 </div>
 506 <div class="refsect3">
 507 <a name="hb-ot-math-get-min-connector-overlap.returns"></a><h4>Returns</h4>
 508 <p> requested minimum connector overlap or zero</p>
 509 </div>
 510 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 511 </div>
 512 <hr>
 513 <div class="refsect2">
 514 <a name="hb-ot-math-get-glyph-assembly"></a><h3>hb_ot_math_get_glyph_assembly ()</h3>
 515 <pre class="programlisting">unsigned <span class="returnvalue">int</span>
 516 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>,
 517                                <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>,
 518                                <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>,
 519                                <em class="parameter"><code>unsigned <span class="type">int</span> start_offset</code></em>,
 520                                <em class="parameter"><code>unsigned <span class="type">int</span> *parts_count</code></em>,
 521                                <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>,
 522                                <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>
 523 <p>Fetches the GlyphAssembly for the specified font, glyph index, and direction.
 524 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
 525 used to draw the glyph and an italics-correction value (if one is defined
 526 in the font).</p>
 527 <div class="note">The <em class="parameter"><code>direction</code></em> parameter is only used to select between horizontal
 528 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>
 529 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
 530 considered.</div>
 531 <div class="refsect3">
 532 <a name="hb-ot-math-get-glyph-assembly.parameters"></a><h4>Parameters</h4>
 533 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 534 <colgroup>
 535 <col width="150px" class="parameters_name">
 536 <col class="parameters_description">
 537 <col width="200px" class="parameters_annotations">
 538 </colgroup>
 539 <tbody>
 540 <tr>
 541 <td class="parameter_name"><p>font</p></td>
 542 <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>
 543 <td class="parameter_annotations"> </td>
 544 </tr>
 545 <tr>
 546 <td class="parameter_name"><p>glyph</p></td>
 547 <td class="parameter_description"><p>The index of the glyph to stretch</p></td>
 548 <td class="parameter_annotations"> </td>
 549 </tr>
 550 <tr>
 551 <td class="parameter_name"><p>direction</p></td>
 552 <td class="parameter_description"><p>direction of the stretching (horizontal or vertical)</p></td>
 553 <td class="parameter_annotations"> </td>
 554 </tr>
 555 <tr>
 556 <td class="parameter_name"><p>start_offset</p></td>
 557 <td class="parameter_description"><p>offset of the first glyph part to retrieve</p></td>
 558 <td class="parameter_annotations"> </td>
 559 </tr>
 560 <tr>
 561 <td class="parameter_name"><p>parts_count</p></td>
 562 <td class="parameter_description"><p>Input = maximum number of glyph parts to return;
 563 Output = actual number of parts returned. </p></td>
 564 <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>
 565 </tr>
 566 <tr>
 567 <td class="parameter_name"><p>parts</p></td>
 568 <td class="parameter_description"><p>the glyph parts returned. </p></td>
 569 <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>
 570 </tr>
 571 <tr>
 572 <td class="parameter_name"><p>italics_correction</p></td>
 573 <td class="parameter_description"><p>italics correction of the glyph assembly. </p></td>
 574 <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>
 575 </tr>
 576 </tbody>
 577 </table></div>
 578 </div>
 579 <div class="refsect3">
 580 <a name="hb-ot-math-get-glyph-assembly.returns"></a><h4>Returns</h4>
 581 <p> the total number of parts in the glyph assembly</p>
 582 </div>
 583 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 584 </div>
 585 </div>
 586 <div class="refsect1">
 587 <a name="harfbuzz-hb-ot-math.other_details"></a><h2>Types and Values</h2>
 588 <div class="refsect2">
 589 <a name="HB-OT-TAG-MATH:CAPS"></a><h3>HB_OT_TAG_MATH</h3>
 590 <pre class="programlisting">#define HB_OT_TAG_MATH HB_TAG('M','A','T','H')
 591 </pre>
 592 </div>
 593 <hr>
 594 <div class="refsect2">
 595 <a name="HB-OT-MATH-SCRIPT:CAPS"></a><h3>HB_OT_MATH_SCRIPT</h3>
 596 <pre class="programlisting">#define HB_OT_MATH_SCRIPT HB_TAG('m','a','t','h')
 597 </pre>
 598 </div>
 599 <hr>
 600 <div class="refsect2">
 601 <a name="hb-ot-math-constant-t"></a><h3>enum hb_ot_math_constant_t</h3>
 602 <p>The 'MATH' table constants specified at
 603 https://docs.microsoft.com/en-us/typography/opentype/spec/math</p>
 604 <div class="refsect3">
 605 <a name="hb-ot-math-constant-t.members"></a><h4>Members</h4>
 606 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 607 <colgroup>
 608 <col width="300px" class="enum_members_name">
 609 <col class="enum_members_description">
 610 <col width="200px" class="enum_members_annotations">
 611 </colgroup>
 612 <tbody>
 613 <tr>
 614 <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>
 615 <td> </td>
 616 <td> </td>
 617 </tr>
 618 <tr>
 619 <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>
 620 <td> </td>
 621 <td> </td>
 622 </tr>
 623 <tr>
 624 <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>
 625 <td> </td>
 626 <td> </td>
 627 </tr>
 628 <tr>
 629 <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>
 630 <td> </td>
 631 <td> </td>
 632 </tr>
 633 <tr>
 634 <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-MATH-LEADING:CAPS"></a>HB_OT_MATH_CONSTANT_MATH_LEADING</p></td>
 635 <td> </td>
 636 <td> </td>
 637 </tr>
 638 <tr>
 639 <td class="enum_member_name"><p><a name="HB-OT-MATH-CONSTANT-AXIS-HEIGHT:CAPS"></a>HB_OT_MATH_CONSTANT_AXIS_HEIGHT</p></td>
 640 <td> </td>
 641 <td> </td>
 642 </tr>
 643 <tr>
 644 <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>
 645 <td> </td>
 646 <td> </td>
 647 </tr>
 648 <tr>
 649 <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>
 650 <td> </td>
 651 <td> </td>
 652 </tr>
 653 <tr>
 654 <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>
 655 <td> </td>
 656 <td> </td>
 657 </tr>
 658 <tr>
 659 <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>
 660 <td> </td>
 661 <td> </td>
 662 </tr>
 663 <tr>
 664 <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>
 665 <td> </td>
 666 <td> </td>
 667 </tr>
 668 <tr>
 669 <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>
 670 <td> </td>
 671 <td> </td>
 672 </tr>
 673 <tr>
 674 <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>
 675 <td> </td>
 676 <td> </td>
 677 </tr>
 678 <tr>
 679 <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>
 680 <td> </td>
 681 <td> </td>
 682 </tr>
 683 <tr>
 684 <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>
 685 <td> </td>
 686 <td> </td>
 687 </tr>
 688 <tr>
 689 <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>
 690 <td> </td>
 691 <td> </td>
 692 </tr>
 693 <tr>
 694 <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>
 695 <td> </td>
 696 <td> </td>
 697 </tr>
 698 <tr>
 699 <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>
 700 <td> </td>
 701 <td> </td>
 702 </tr>
 703 <tr>
 704 <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>
 705 <td> </td>
 706 <td> </td>
 707 </tr>
 708 <tr>
 709 <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>
 710 <td> </td>
 711 <td> </td>
 712 </tr>
 713 <tr>
 714 <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>
 715 <td> </td>
 716 <td> </td>
 717 </tr>
 718 <tr>
 719 <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>
 720 <td> </td>
 721 <td> </td>
 722 </tr>
 723 <tr>
 724 <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>
 725 <td> </td>
 726 <td> </td>
 727 </tr>
 728 <tr>
 729 <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>
 730 <td> </td>
 731 <td> </td>
 732 </tr>
 733 <tr>
 734 <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>
 735 <td> </td>
 736 <td> </td>
 737 </tr>
 738 <tr>
 739 <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>
 740 <td> </td>
 741 <td> </td>
 742 </tr>
 743 <tr>
 744 <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>
 745 <td> </td>
 746 <td> </td>
 747 </tr>
 748 <tr>
 749 <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>
 750 <td> </td>
 751 <td> </td>
 752 </tr>
 753 <tr>
 754 <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>
 755 <td> </td>
 756 <td> </td>
 757 </tr>
 758 <tr>
 759 <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>
 760 <td> </td>
 761 <td> </td>
 762 </tr>
 763 <tr>
 764 <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>
 765 <td> </td>
 766 <td> </td>
 767 </tr>
 768 <tr>
 769 <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>
 770 <td> </td>
 771 <td> </td>
 772 </tr>
 773 <tr>
 774 <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>
 775 <td> </td>
 776 <td> </td>
 777 </tr>
 778 <tr>
 779 <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>
 780 <td> </td>
 781 <td> </td>
 782 </tr>
 783 <tr>
 784 <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>
 785 <td> </td>
 786 <td> </td>
 787 </tr>
 788 <tr>
 789 <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>
 790 <td> </td>
 791 <td> </td>
 792 </tr>
 793 <tr>
 794 <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>
 795 <td> </td>
 796 <td> </td>
 797 </tr>
 798 <tr>
 799 <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>
 800 <td> </td>
 801 <td> </td>
 802 </tr>
 803 <tr>
 804 <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>
 805 <td> </td>
 806 <td> </td>
 807 </tr>
 808 <tr>
 809 <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>
 810 <td> </td>
 811 <td> </td>
 812 </tr>
 813 <tr>
 814 <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>
 815 <td> </td>
 816 <td> </td>
 817 </tr>
 818 <tr>
 819 <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>
 820 <td> </td>
 821 <td> </td>
 822 </tr>
 823 <tr>
 824 <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>
 825 <td> </td>
 826 <td> </td>
 827 </tr>
 828 <tr>
 829 <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>
 830 <td> </td>
 831 <td> </td>
 832 </tr>
 833 <tr>
 834 <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>
 835 <td> </td>
 836 <td> </td>
 837 </tr>
 838 <tr>
 839 <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>
 840 <td> </td>
 841 <td> </td>
 842 </tr>
 843 <tr>
 844 <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>
 845 <td> </td>
 846 <td> </td>
 847 </tr>
 848 <tr>
 849 <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>
 850 <td> </td>
 851 <td> </td>
 852 </tr>
 853 <tr>
 854 <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>
 855 <td> </td>
 856 <td> </td>
 857 </tr>
 858 <tr>
 859 <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>
 860 <td> </td>
 861 <td> </td>
 862 </tr>
 863 <tr>
 864 <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>
 865 <td> </td>
 866 <td> </td>
 867 </tr>
 868 <tr>
 869 <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>
 870 <td> </td>
 871 <td> </td>
 872 </tr>
 873 <tr>
 874 <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>
 875 <td> </td>
 876 <td> </td>
 877 </tr>
 878 <tr>
 879 <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>
 880 <td> </td>
 881 <td> </td>
 882 </tr>
 883 <tr>
 884 <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>
 885 <td> </td>
 886 <td> </td>
 887 </tr>
 888 <tr>
 889 <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>
 890 <td> </td>
 891 <td> </td>
 892 </tr>
 893 </tbody>
 894 </table></div>
 895 </div>
 896 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 897 </div>
 898 <hr>
 899 <div class="refsect2">
 900 <a name="hb-ot-math-kern-t"></a><h3>enum hb_ot_math_kern_t</h3>
 901 <p>The math kerning-table types defined for the four corners
 902 of a glyph.</p>
 903 <div class="refsect3">
 904 <a name="hb-ot-math-kern-t.members"></a><h4>Members</h4>
 905 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 906 <colgroup>
 907 <col width="300px" class="enum_members_name">
 908 <col class="enum_members_description">
 909 <col width="200px" class="enum_members_annotations">
 910 </colgroup>
 911 <tbody>
 912 <tr>
 913 <td class="enum_member_name"><p><a name="HB-OT-MATH-KERN-TOP-RIGHT:CAPS"></a>HB_OT_MATH_KERN_TOP_RIGHT</p></td>
 914 <td> </td>
 915 <td> </td>
 916 </tr>
 917 <tr>
 918 <td class="enum_member_name"><p><a name="HB-OT-MATH-KERN-TOP-LEFT:CAPS"></a>HB_OT_MATH_KERN_TOP_LEFT</p></td>
 919 <td> </td>
 920 <td> </td>
 921 </tr>
 922 <tr>
 923 <td class="enum_member_name"><p><a name="HB-OT-MATH-KERN-BOTTOM-RIGHT:CAPS"></a>HB_OT_MATH_KERN_BOTTOM_RIGHT</p></td>
 924 <td> </td>
 925 <td> </td>
 926 </tr>
 927 <tr>
 928 <td class="enum_member_name"><p><a name="HB-OT-MATH-KERN-BOTTOM-LEFT:CAPS"></a>HB_OT_MATH_KERN_BOTTOM_LEFT</p></td>
 929 <td> </td>
 930 <td> </td>
 931 </tr>
 932 </tbody>
 933 </table></div>
 934 </div>
 935 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 936 </div>
 937 <hr>
 938 <div class="refsect2">
 939 <a name="hb-ot-math-glyph-variant-t"></a><h3>hb_ot_math_glyph_variant_t</h3>
 940 <pre class="programlisting">typedef struct {
 941   hb_codepoint_t glyph;
 942   hb_position_t advance;
 943 } hb_ot_math_glyph_variant_t;
 944 </pre>
 945 <p>Data type to hold math-variant information for a glyph.</p>
 946 <div class="refsect3">
 947 <a name="hb-ot-math-glyph-variant-t.members"></a><h4>Members</h4>
 948 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 949 <colgroup>
 950 <col width="300px" class="struct_members_name">
 951 <col class="struct_members_description">
 952 <col width="200px" class="struct_members_annotations">
 953 </colgroup>
 954 <tbody>
 955 <tr>
 956 <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>
 957 <td class="struct_member_description"><p>The glyph index of the variant</p></td>
 958 <td class="struct_member_annotations"> </td>
 959 </tr>
 960 <tr>
 961 <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>
 962 <td class="struct_member_description"><p>The advance width of the variant</p></td>
 963 <td class="struct_member_annotations"> </td>
 964 </tr>
 965 </tbody>
 966 </table></div>
 967 </div>
 968 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 969 </div>
 970 <hr>
 971 <div class="refsect2">
 972 <a name="hb-ot-math-glyph-part-flags-t"></a><h3>enum hb_ot_math_glyph_part_flags_t</h3>
 973 <p>Flags for math glyph parts.</p>
 974 <div class="refsect3">
 975 <a name="hb-ot-math-glyph-part-flags-t.members"></a><h4>Members</h4>
 976 <div class="informaltable"><table class="informaltable" width="100%" border="0">
 977 <colgroup>
 978 <col width="300px" class="enum_members_name">
 979 <col class="enum_members_description">
 980 <col width="200px" class="enum_members_annotations">
 981 </colgroup>
 982 <tbody><tr>
 983 <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>
 984 <td> </td>
 985 <td> </td>
 986 </tr></tbody>
 987 </table></div>
 988 </div>
 989 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
 990 </div>
 991 <hr>
 992 <div class="refsect2">
 993 <a name="hb-ot-math-glyph-part-t"></a><h3>hb_ot_math_glyph_part_t</h3>
 994 <pre class="programlisting">typedef struct {
 995   hb_codepoint_t glyph;
 996   hb_position_t start_connector_length;
 997   hb_position_t end_connector_length;
 998   hb_position_t full_advance;
 999   hb_ot_math_glyph_part_flags_t flags;
1000 } hb_ot_math_glyph_part_t;
1001 </pre>
1002 <p>Data type to hold information for a "part" component of a math-variant glyph.
1003 Large variants for stretchable math glyphs (such as parentheses) can be constructed
1004 on the fly from parts.</p>
1005 <div class="refsect3">
1006 <a name="hb-ot-math-glyph-part-t.members"></a><h4>Members</h4>
1007 <div class="informaltable"><table class="informaltable" width="100%" border="0">
1008 <colgroup>
1009 <col width="300px" class="struct_members_name">
1010 <col class="struct_members_description">
1011 <col width="200px" class="struct_members_annotations">
1012 </colgroup>
1013 <tbody>
1014 <tr>
1015 <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>
1016 <td class="struct_member_description"><p>The glyph index of the variant part</p></td>
1017 <td class="struct_member_annotations"> </td>
1018 </tr>
1019 <tr>
1020 <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>
1021 <td class="struct_member_description"><p>The length of the connector on the starting side of the variant part</p></td>
1022 <td class="struct_member_annotations"> </td>
1023 </tr>
1024 <tr>
1025 <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>
1026 <td class="struct_member_description"><p>The length of the connector on the ending side of the variant part</p></td>
1027 <td class="struct_member_annotations"> </td>
1028 </tr>
1029 <tr>
1030 <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>
1031 <td class="struct_member_description"><p>The total advance of the part</p></td>
1032 <td class="struct_member_annotations"> </td>
1033 </tr>
1034 <tr>
1035 <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>
1036 <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>
1037 <td class="struct_member_annotations"> </td>
1038 </tr>
1039 </tbody>
1040 </table></div>
1041 </div>
1042 <p class="since">Since: <a class="link" href="api-index-1-3-3.html#api-index-1.3.3">1.3.3</a></p>
1043 </div>
1044 </div>
1045 </div>
1046 <div class="footer">
1047 <hr>Generated by GTK-Doc V1.32.1</div>
1048 </body>
1049 </html>