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<h1>FLT API</h1>
<p>API provided by libm17n-flt.so.
<a href="#_details">More...</a></p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Data Structures</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="structMFLTGlyph.html">MFLTGlyph</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Type of information about a glyph. <a href="structMFLTGlyph.html#_details">More...</a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="structMFLTGlyphAdjustment.html">MFLTGlyphAdjustment</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Type of information about a glyph position adjustment. <a href="structMFLTGlyphAdjustment.html#_details">More...</a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="structMFLTGlyphString.html">MFLTGlyphString</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Type of information about a glyph sequence. <a href="structMFLTGlyphString.html#_details">More...</a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="structMFLTOtfSpec.html">MFLTOtfSpec</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Type of specification of GSUB and GPOS OpenType tables. <a href="structMFLTOtfSpec.html#_details">More...</a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="structMFLTFont.html">MFLTFont</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Type of font to be used by the FLT driver. <a href="structMFLTFont.html#_details">More...</a><br/></td></tr>
<tr><td colspan="2"><h2>Typedefs</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">typedef struct _MFLT </td><td class="memItemRight" valign="bottom"><a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Type of FLT (Font Layout Table). <a href="#ga28abba06fa26ca3d9389382261905add"></a><br/></td></tr>
<tr><td colspan="2"><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__m17nFLT.html#ga3f239eb3dc7eb38ba2784959f6be8a9b">mflt_get</a> (<a class="el" href="group__m17nSymbol.html#ga0f53a95817f0b5c26442f8e12f89c16d">MSymbol</a> name)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return an FLT object that has a specified name. <a href="#ga3f239eb3dc7eb38ba2784959f6be8a9b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__m17nFLT.html#gaadd34d825776eff1571a6ec1ebf18213">mflt_find</a> (int c, <a class="el" href="structMFLTFont.html">MFLTFont</a> *font)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Find an FLT suitable for the specified character and font. <a href="#gaadd34d825776eff1571a6ec1ebf18213"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__m17nFLT.html#ga1a01dd37b3e13e32317694164cb2bae7">mflt_name</a> (<a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> *flt)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the name of an FLT. <a href="#ga1a01dd37b3e13e32317694164cb2bae7"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__m17nChartable.html#ga241f7150476db7182aecb944b711c546">MCharTable</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__m17nFLT.html#ga6da91edea6065f90515c24fd48455e54">mflt_coverage</a> (<a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> *flt)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return a coverage of a FLT. <a href="#ga6da91edea6065f90515c24fd48455e54"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__m17nFLT.html#gab7bf42cc0f306fb6058ba5d10e79e27d">mflt_run</a> (<a class="el" href="structMFLTGlyphString.html">MFLTGlyphString</a> *gstring, int from, int to, <a class="el" href="structMFLTFont.html">MFLTFont</a> *font, <a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> *flt)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Layout characters with an FLT. <a href="#gab7bf42cc0f306fb6058ba5d10e79e27d"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__m17nFLT.html#gaad4554d5e2eea550061234debdf6f0c8">mdebug_dump_flt</a> (<a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> *flt, int indent)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Dump a Font Layout Table. <a href="#gaad4554d5e2eea550061234debdf6f0c8"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__m17nFLT.html#ga117deb444c67e3e003f9727ca54cb095">mflt_dump_gstring</a> (<a class="el" href="structMFLTGlyphString.html">MFLTGlyphString</a> *gstring)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Dump an <a class="el" href="structMFLTGlyphString.html" title="Type of information about a glyph sequence.">MFLTGlyphString</a>. <a href="#ga117deb444c67e3e003f9727ca54cb095"></a><br/></td></tr>
<tr><td colspan="2"><h2>Variables</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__m17nFLT.html#ga8fa9d49e4291440961b37717afce653b">mflt_enable_new_feature</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Flag to control several new OTF handling commands. <a href="#ga8fa9d49e4291440961b37717afce653b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="group__m17nFLT.html#ga2286495d42b49ce59cb0730482a89c70">mflt_iterate_otf_feature</a> )(struct _MFLTFont *font, <a class="el" href="structMFLTOtfSpec.html">MFLTOtfSpec</a> *spec, int from, int to, unsigned char *table)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__m17nSymbol.html#ga0f53a95817f0b5c26442f8e12f89c16d">MSymbol</a>(* </td><td class="memItemRight" valign="bottom"><a class="el" href="group__m17nFLT.html#ga34b4a542edc38d30fe6c5fc326b5a987">mflt_font_id</a> )(struct _MFLTFont *font)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="group__m17nFLT.html#gac5e9a0518e0ca3b1ead5a7a9050846bb">mflt_try_otf</a> )(struct _MFLTFont *font, <a class="el" href="structMFLTOtfSpec.html">MFLTOtfSpec</a> *spec, <a class="el" href="structMFLTGlyphString.html">MFLTGlyphString</a> *gstring, int from, int to)</td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>API provided by libm17n-flt.so. </p>
<p>FLT support for a window system.</p>
<p>This section defines the m17n FLT API concerning character layouting facility using FLT (Font Layout Table). The format of FLT is described in <a class="el" href="m17nDBFormat.html#mdbFLT">Font Layout Table</a>. </p>
<hr/><h2>Typedef Documentation</h2>
<a class="anchor" id="ga28abba06fa26ca3d9389382261905add"></a><!-- doxytag: member="m17n-flt.h::MFLT" ref="ga28abba06fa26ca3d9389382261905add" args="" -->
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<td class="memname">typedef struct _MFLT <a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a></td>
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<div class="memdoc">
<p>Type of FLT (Font Layout Table). </p>
<p>The type <a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add" title="Type of FLT (Font Layout Table).">MFLT</a> is for an FLT object. Its internal structure is concealed from application programs. </p>
</div>
</div>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="ga3f239eb3dc7eb38ba2784959f6be8a9b"></a><!-- doxytag: member="m17n-flt.h::mflt_get" ref="ga3f239eb3dc7eb38ba2784959f6be8a9b" args="(MSymbol name)" -->
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<td class="memname"><a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> * mflt_get </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__m17nSymbol.html#ga0f53a95817f0b5c26442f8e12f89c16d">MSymbol</a> </td>
<td class="paramname"> <em>name</em></td>
<td> ) </td>
<td></td>
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<div class="memdoc">
<p>Return an FLT object that has a specified name. </p>
<p>The <a class="el" href="group__m17nFLT.html#ga3f239eb3dc7eb38ba2784959f6be8a9b" title="Return an FLT object that has a specified name.">mflt_get()</a> function returns an FLT object whose name is <b>name</b>.</p>
<dl class="user"><dt><b>Return value:</b></dt><dd>If the operation was successful, <a class="el" href="group__m17nFLT.html#ga3f239eb3dc7eb38ba2784959f6be8a9b" title="Return an FLT object that has a specified name.">mflt_get()</a> returns a pointer to the found FLT object. Otherwise, it returns <code>NULL</code>. </dd></dl>
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<a class="anchor" id="gaadd34d825776eff1571a6ec1ebf18213"></a><!-- doxytag: member="m17n-flt.h::mflt_find" ref="gaadd34d825776eff1571a6ec1ebf18213" args="(int c, MFLTFont *font)" -->
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<td class="memname"><a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> * mflt_find </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>c</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structMFLTFont.html">MFLTFont</a> * </td>
<td class="paramname"> <em>font</em></td><td> </td>
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<td></td>
<td>)</td>
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<div class="memdoc">
<p>Find an FLT suitable for the specified character and font. </p>
<p>The <a class="el" href="group__m17nFLT.html#gaadd34d825776eff1571a6ec1ebf18213" title="Find an FLT suitable for the specified character and font.">mflt_find()</a> function returns the most appropriate FLT for layouting character <b>c</b> with font <b>font</b>.</p>
<dl class="user"><dt><b>Return value:</b></dt><dd>If the operation was successful, <a class="el" href="group__m17nFLT.html#gaadd34d825776eff1571a6ec1ebf18213" title="Find an FLT suitable for the specified character and font.">mflt_find()</a> returns a pointer to the found FLT object. Otherwise, it returns <code>NULL</code>. </dd></dl>
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<a class="anchor" id="ga1a01dd37b3e13e32317694164cb2bae7"></a><!-- doxytag: member="m17n-flt.h::mflt_name" ref="ga1a01dd37b3e13e32317694164cb2bae7" args="(MFLT *flt)" -->
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<td class="memname">const char * mflt_name </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> * </td>
<td class="paramname"> <em>flt</em></td>
<td> ) </td>
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<p>Return the name of an FLT. </p>
<p>The <a class="el" href="group__m17nFLT.html#ga1a01dd37b3e13e32317694164cb2bae7" title="Return the name of an FLT.">mflt_name()</a> function returns the name of <b>flt</b>. </p>
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<a class="anchor" id="ga6da91edea6065f90515c24fd48455e54"></a><!-- doxytag: member="m17n-flt.h::mflt_coverage" ref="ga6da91edea6065f90515c24fd48455e54" args="(MFLT *flt)" -->
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<td class="memname"><a class="el" href="group__m17nChartable.html#ga241f7150476db7182aecb944b711c546">MCharTable</a> * mflt_coverage </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> * </td>
<td class="paramname"> <em>flt</em></td>
<td> ) </td>
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<p>Return a coverage of a FLT. </p>
<p>The <a class="el" href="group__m17nFLT.html#ga6da91edea6065f90515c24fd48455e54" title="Return a coverage of a FLT.">mflt_coverage()</a> function returns a char-table that contains nonzero values for characters supported by <b>flt</b>. </p>
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<a class="anchor" id="gab7bf42cc0f306fb6058ba5d10e79e27d"></a><!-- doxytag: member="m17n-flt.h::mflt_run" ref="gab7bf42cc0f306fb6058ba5d10e79e27d" args="(MFLTGlyphString *gstring, int from, int to, MFLTFont *font, MFLT *flt)" -->
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<td class="memname">int mflt_run </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structMFLTGlyphString.html">MFLTGlyphString</a> * </td>
<td class="paramname"> <em>gstring</em>, </td>
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<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>from</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>to</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structMFLTFont.html">MFLTFont</a> * </td>
<td class="paramname"> <em>font</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> * </td>
<td class="paramname"> <em>flt</em></td><td> </td>
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<td>)</td>
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<p>Layout characters with an FLT. </p>
<p>The <a class="el" href="group__m17nFLT.html#gab7bf42cc0f306fb6058ba5d10e79e27d" title="Layout characters with an FLT.">mflt_run()</a> function layouts characters in <b>gstring</b> between <b>from</b> (inclusive) and <b>to</b> (exclusive) with <b>font</b>. If <b>flt</b> is nonzero, it is used for all the charaters. Otherwise, appropriate FLTs are automatically chosen.</p>
<dl><dt><b>Return values:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>>=0</em> </td><td>The operation was successful. The value is the index to the glyph, which was previously indexed by <b>to</b>, in <b>gstring->glyphs</b>.</td></tr>
<tr><td valign="top"></td><td valign="top"><em>-2</em> </td><td><b>gstring->glyphs</b> is too short to store the result. The caller can call this fucntion again with a longer <b>gstring->glyphs</b>.</td></tr>
<tr><td valign="top"></td><td valign="top"><em>-1</em> </td><td>Some other error occurred. </td></tr>
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<a class="anchor" id="gaad4554d5e2eea550061234debdf6f0c8"></a><!-- doxytag: member="m17n-flt.c::mdebug_dump_flt" ref="gaad4554d5e2eea550061234debdf6f0c8" args="(MFLT *flt, int indent)" -->
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<td class="memname"><a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a>* mdebug_dump_flt </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__m17nFLT.html#ga28abba06fa26ca3d9389382261905add">MFLT</a> * </td>
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<p>Dump a Font Layout Table. </p>
<p>The <a class="el" href="group__m17nFLT.html#gaad4554d5e2eea550061234debdf6f0c8" title="Dump a Font Layout Table.">mdebug_dump_flt()</a> function prints the Font Layout Table <b>flt</b> in a human readable way to the stderr or to what specified by the environment variable MDEBUG_OUTPUT_FILE. <b>indent</b> specifies how many columns to indent the lines but the first one.</p>
<dl class="user"><dt><b>Return value:</b></dt><dd>This function returns <b>flt</b>. </dd></dl>
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<a class="anchor" id="ga117deb444c67e3e003f9727ca54cb095"></a><!-- doxytag: member="m17n-flt.c::mflt_dump_gstring" ref="ga117deb444c67e3e003f9727ca54cb095" args="(MFLTGlyphString *gstring)" -->
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<td class="memname">void mflt_dump_gstring </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structMFLTGlyphString.html">MFLTGlyphString</a> * </td>
<td class="paramname"> <em>gstring</em></td>
<td> ) </td>
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<p>Dump an <a class="el" href="structMFLTGlyphString.html" title="Type of information about a glyph sequence.">MFLTGlyphString</a>. </p>
<p>The <a class="el" href="group__m17nFLT.html#ga117deb444c67e3e003f9727ca54cb095" title="Dump an MFLTGlyphString.">mflt_dump_gstring()</a> function prints the glyph sequence <b>gstring</b> in a human readable way to the stderr or to what specified by the environment variable MDEBUG_OUTPUT_FILE. </p>
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<hr/><h2>Variable Documentation</h2>
<a class="anchor" id="ga8fa9d49e4291440961b37717afce653b"></a><!-- doxytag: member="m17n-flt.c::mflt_enable_new_feature" ref="ga8fa9d49e4291440961b37717afce653b" args="" -->
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<td class="memname">int <a class="el" href="group__m17nFLT.html#ga8fa9d49e4291440961b37717afce653b">mflt_enable_new_feature</a></td>
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<p>Flag to control several new OTF handling commands. </p>
<p>If the variable mflt_enable_new_feature is nonzero, the function <a class="el" href="group__m17nFLT.html#gab7bf42cc0f306fb6058ba5d10e79e27d" title="Layout characters with an FLT.">mflt_run()</a> can drive a Font Layout Table that contains the new OTF-related commands ":otf?" and/or OTF feature specification in a category table. </p>
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<a class="anchor" id="ga2286495d42b49ce59cb0730482a89c70"></a><!-- doxytag: member="m17n-flt.c::mflt_iterate_otf_feature" ref="ga2286495d42b49ce59cb0730482a89c70" args=")(struct _MFLTFont *font, MFLTOtfSpec *spec, int from, int to, unsigned char *table)" -->
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<td class="memname">int(* <a class="el" href="group__m17nFLT.html#ga2286495d42b49ce59cb0730482a89c70">mflt_iterate_otf_feature</a>)(struct _MFLTFont *font, <a class="el" href="structMFLTOtfSpec.html">MFLTOtfSpec</a> *spec, int from, int to, unsigned char *table)</td>
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<a class="anchor" id="ga34b4a542edc38d30fe6c5fc326b5a987"></a><!-- doxytag: member="m17n-flt.c::mflt_font_id" ref="ga34b4a542edc38d30fe6c5fc326b5a987" args=")(struct _MFLTFont *font)" -->
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<td class="memname"><a class="el" href="group__m17nSymbol.html#ga0f53a95817f0b5c26442f8e12f89c16d">MSymbol</a>(* <a class="el" href="group__m17nFLT.html#ga34b4a542edc38d30fe6c5fc326b5a987">mflt_font_id</a>)(struct _MFLTFont *font)</td>
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<a class="anchor" id="gac5e9a0518e0ca3b1ead5a7a9050846bb"></a><!-- doxytag: member="m17n-flt.c::mflt_try_otf" ref="gac5e9a0518e0ca3b1ead5a7a9050846bb" args=")(struct _MFLTFont *font, MFLTOtfSpec *spec, MFLTGlyphString *gstring, int from, int to)" -->
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<td class="memname">int(* <a class="el" href="group__m17nFLT.html#gac5e9a0518e0ca3b1ead5a7a9050846bb">mflt_try_otf</a>)(struct _MFLTFont *font, <a class="el" href="structMFLTOtfSpec.html">MFLTOtfSpec</a> *spec, <a class="el" href="structMFLTGlyphString.html">MFLTGlyphString</a> *gstring, int from, int to)</td>
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