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<p>Validate various OpenType tables to assure that all offsets and indices are valid. The idea is that a higher-level library that actually does the text layout can access those tables without error checking (which can be quite time consuming).</p><h4>input</h4><table class="fields"><tr><td class="val" id="face">face</td><td class="desc"><p>A handle to the input face.</p></td></tr><tr><td class="val" id="validation_flags">validation_flags</td><td class="desc"><p>A bit field that specifies the tables to be validated. See <code><a href="ft2-ot_validation.html#ft_validate_otxxx">FT_VALIDATE_OTXXX</a></code> for possible values.</p></td></tr></table>
<h4>output</h4><table class="fields"><tr><td class="val" id="base_table">BASE_table</td><td class="desc"><p>A pointer to the BASE table.</p></td></tr><tr><td class="val" id="gdef_table">GDEF_table</td><td class="desc"><p>A pointer to the GDEF table.</p></td></tr><tr><td class="val" id="gpos_table">GPOS_table</td><td class="desc"><p>A pointer to the GPOS table.</p></td></tr><tr><td class="val" id="gsub_table">GSUB_table</td><td class="desc"><p>A pointer to the GSUB table.</p></td></tr><tr><td class="val" id="jstf_table">JSTF_table</td><td class="desc"><p>A pointer to the JSTF table.</p></td></tr></table>
<h4>return</h4>
<p>FreeType error code. 0&nbsp;means success.</p><h4>note</h4>
<p>This function only works with OpenType fonts, returning an error otherwise.</p><p>After use, the application should deallocate the five tables with <code><a href="ft2-ot_validation.html#ft_opentype_free">FT_OpenType_Free</a></code>. A <code>NULL</code> value indicates that the table either doesn't exist in the font, or the application hasn't asked for validation.</p><hr>
<h2 id="ft_opentype_free">FT_OpenType_Free<a class="headerlink" href="#ft_opentype_free" title="Permanent link">&para;</a></h2><p>Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h).</p><div class = "codehilite"><pre><code>  FT_EXPORT( <span class="keyword">void</span> )  <b>FT_OpenType_Free</b>( <a href="ft2-base_interface.html#ft_face">FT_Face</a>   face,                    <a href="ft2-basic_types.html#ft_bytes">FT_Bytes</a>  table );</code></pre></div>
<p>Free the buffer allocated by OpenType validator.</p><h4>input</h4><table class="fields"><tr><td class="val" id="face">face</td><td class="desc"><p>A handle to the input face.</p></td></tr><tr><td class="val" id="table">table</td><td class="desc"><p>The pointer to the buffer that is allocated by <code><a href="ft2-ot_validation.html#ft_opentype_validate">FT_OpenType_Validate</a></code>.</p></td></tr></table>
<h4>note</h4>
<p>This function must be used to free the buffer allocated by <code><a href="ft2-ot_validation.html#ft_opentype_validate">FT_OpenType_Validate</a></code> only.</p><hr>
<h2 id="ft_validate_otxxx">FT_VALIDATE_OTXXX<a class="headerlink" href="#ft_validate_otxxx" title="Permanent link">&para;</a></h2><p>Defined in FT_OPENTYPE_VALIDATE_H (freetype/ftotval.h).</p><div class = "codehilite"><pre><code>#<span class="keyword">define</span> <a href="ft2-ot_validation.html#ft_validate_base">FT_VALIDATE_BASE</a>  0x0100#<span class="keyword">define</span> <a href="ft2-ot_validation.html#ft_validate_gdef">FT_VALIDATE_GDEF</a>  0x0200#<span class="keyword">define</span> <a href="ft2-ot_validation.html#ft_validate_gpos">FT_VALIDATE_GPOS</a>  0x0400#<span class="keyword">define</span> <a href="ft2-ot_validation.html#ft_validate_gsub">FT_VALIDATE_GSUB</a>  0x0800#<span class="keyword">define</span> <a href="ft2-ot_validation.html#ft_validate_jstf">FT_VALIDATE_JSTF</a>  0x1000#<span class="keyword">define</span> <a href="ft2-ot_validation.html#ft_validate_math">FT_VALIDATE_MATH</a>  0x2000
#<span class="keyword">define</span> <a href="ft2-ot_validation.html#ft_validate_ot">FT_VALIDATE_OT</a>  ( <a href="ft2-ot_validation.html#ft_validate_base">FT_VALIDATE_BASE</a> | \                          <a href="ft2-ot_validation.html#ft_validate_gdef">FT_VALIDATE_GDEF</a> | \                          <a href="ft2-ot_validation.html#ft_validate_gpos">FT_VALIDATE_GPOS</a> | \                          <a href="ft2-ot_validation.html#ft_validate_gsub">FT_VALIDATE_GSUB</a> | \                          <a href="ft2-ot_validation.html#ft_validate_jstf">FT_VALIDATE_JSTF</a> | \                          <a href="ft2-ot_validation.html#ft_validate_math">FT_VALIDATE_MATH</a> )</code></pre></div>
<p>A list of bit-field constants used with <code><a href="ft2-ot_validation.html#ft_opentype_validate">FT_OpenType_Validate</a></code> to indicate which OpenType tables should be validated.</p><h4>values</h4><table class="fields"><tr><td class="val" id="ft_validate_base">FT_VALIDATE_BASE</td><td class="desc"><p>Validate BASE table.</p></td></tr><tr><td class="val" id="ft_validate_gdef">FT_VALIDATE_GDEF</td><td class="desc"><p>Validate GDEF table.</p></td></tr><tr><td class="val" id="ft_validate_gpos">FT_VALIDATE_GPOS</td><td class="desc"><p>Validate GPOS table.</p></td></tr><tr><td class="val" id="ft_validate_gsub">FT_VALIDATE_GSUB</td><td class="desc"><p>Validate GSUB table.</p></td></tr><tr><td class="val" id="ft_validate_jstf">FT_VALIDATE_JSTF</td><td class="desc"><p>Validate JSTF table.</p></td></tr><tr><td class="val" id="ft_validate_math">FT_VALIDATE_MATH</td><td class="desc"><p>Validate MATH table.</p></td></tr><tr><td class="val" id="ft_validate_ot">FT_VALIDATE_OT</td><td class="desc"><p>Validate all OpenType tables (BASE, GDEF, GPOS, GSUB, JSTF, MATH).</p></td></tr></table>
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