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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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<title>FreeType-2.3.9 API Reference</title>
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<table align=center><tr><td><font size=-1>[<a href="ft2-index.html">Index</a>]</font></td>
<td width="100%"></td>
<td><font size=-1>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
<center><h1>FreeType-2.3.9 API Reference</h1></center>

<center><h1>
TrueTypeGX/AAT Validation
</h1></center>
<h2>Synopsis</h2>
<table align=center cellspacing=5 cellpadding=0 border=0>
<tr><td></td><td><a href="#FT_VALIDATE_GX_LENGTH">FT_VALIDATE_GX_LENGTH</a></td><td></td><td><a href="#FT_TrueTypeGX_Free">FT_TrueTypeGX_Free</a></td><td></td><td><a href="#FT_ClassicKern_Free">FT_ClassicKern_Free</a></td></tr>
<tr><td></td><td><a href="#FT_VALIDATE_GXXXX">FT_VALIDATE_GXXXX</a></td><td></td><td><a href="#FT_VALIDATE_CKERNXXX">FT_VALIDATE_CKERNXXX</a></td><td></td><td></td></tr>
<tr><td></td><td><a href="#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a></td><td></td><td><a href="#FT_ClassicKern_Validate">FT_ClassicKern_Validate</a></td><td></td><td></td></tr>
</table><br><br>

<table align=center width="87%"><tr><td>
<p>This section contains the declaration of functions to validate some TrueTypeGX tables (feat, mort, morx, bsln, just, kern, opbd, trak, prop, lcar).</p>
</td></tr></table><br>
<table align=center width="75%"><tr><td>
<h4><a name="FT_VALIDATE_GX_LENGTH">FT_VALIDATE_GX_LENGTH</a></h4>
<table align=center width="87%"><tr><td>
<p>The number of tables checked in this module. Use it as a parameter for the &lsquo;table-length&rsquo; argument of function <a href="ft2-gx_validation.html#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a>.</p>
</td></tr></table><br>
</td></tr></table>
<hr width="75%">
<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
<td width="100%"></td>
<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>

<table align=center width="75%"><tr><td>
<h4><a name="FT_VALIDATE_GXXXX">FT_VALIDATE_GXXXX</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>

#define <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_feat</a>  FT_VALIDATE_GX_BITFIELD( feat )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_mort</a>  FT_VALIDATE_GX_BITFIELD( mort )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_morx</a>  FT_VALIDATE_GX_BITFIELD( morx )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_bsln</a>  FT_VALIDATE_GX_BITFIELD( bsln )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_just</a>  FT_VALIDATE_GX_BITFIELD( just )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_kern</a>  FT_VALIDATE_GX_BITFIELD( kern )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_opbd</a>  FT_VALIDATE_GX_BITFIELD( opbd )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_trak</a>  FT_VALIDATE_GX_BITFIELD( trak )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_prop</a>  FT_VALIDATE_GX_BITFIELD( prop )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_lcar</a>  FT_VALIDATE_GX_BITFIELD( lcar )

#define <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_GX</a>  ( <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_feat</a> | \
                          <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_mort</a> | \
                          <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_morx</a> | \
                          <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_bsln</a> | \
                          <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_just</a> | \
                          <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_kern</a> | \
                          <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_opbd</a> | \
                          <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_trak</a> | \
                          <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_prop</a> | \
                          <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_lcar</a> )

</pre></table><br>
<table align=center width="87%"><tr><td>
<p>A list of bit-field constants used with <a href="ft2-gx_validation.html#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a> to indicate which TrueTypeGX/AAT Type tables should be validated.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>values</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>FT_VALIDATE_feat</b></td><td>
<p>Validate &lsquo;feat&rsquo; table.</p>
</td></tr>
<tr valign=top><td><b>FT_VALIDATE_mort</b></td><td>
<p>Validate &lsquo;mort&rsquo; table.</p>
</td></tr>
<tr valign=top><td><b>FT_VALIDATE_morx</b></td><td>
<p>Validate &lsquo;morx&rsquo; table.</p>
</td></tr>
<tr valign=top><td><b>FT_VALIDATE_bsln</b></td><td>
<p>Validate &lsquo;bsln&rsquo; table.</p>
</td></tr>
<tr valign=top><td><b>FT_VALIDATE_just</b></td><td>
<p>Validate &lsquo;just&rsquo; table.</p>
</td></tr>
<tr valign=top><td><b>FT_VALIDATE_kern</b></td><td>
<p>Validate &lsquo;kern&rsquo; table.</p>
</td></tr>
<tr valign=top><td><b>FT_VALIDATE_opbd</b></td><td>
<p>Validate &lsquo;opbd&rsquo; table.</p>
</td></tr>
<tr valign=top><td><b>FT_VALIDATE_trak</b></td><td>
<p>Validate &lsquo;trak&rsquo; table.</p>
</td></tr>
<tr valign=top><td><b>FT_VALIDATE_prop</b></td><td>
<p>Validate &lsquo;prop&rsquo; table.</p>
</td></tr>
<tr valign=top><td><b>FT_VALIDATE_lcar</b></td><td>
<p>Validate &lsquo;lcar&rsquo; table.</p>
</td></tr>
<tr valign=top><td><b>FT_VALIDATE_GX</b></td><td>
<p>Validate all TrueTypeGX tables (feat, mort, morx, bsln, just, kern, opbd, trak, prop and lcar).</p>
</td></tr>
</table>
</td></tr></table>
</td></tr></table>
<hr width="75%">
<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
<td width="100%"></td>
<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>

<table align=center width="75%"><tr><td>
<h4><a name="FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>

  FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
  <b>FT_TrueTypeGX_Validate</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a>   face,
                          <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a>   validation_flags,
                          <a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a>  tables[<a href="ft2-gx_validation.html#FT_VALIDATE_GX_LENGTH">FT_VALIDATE_GX_LENGTH</a>],
                          <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a>   table_length );

</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Validate various TrueTypeGX tables to assure that all offsets and indices are valid. The idea is that a higher-level library which actually does the text layout can access those tables without error checking (which can be quite time consuming).</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>face</b></td><td>
<p>A handle to the input face.</p>
</td></tr>
<tr valign=top><td><b>validation_flags</b></td><td>
<p>A bit field which specifies the tables to be validated. See <a href="ft2-gx_validation.html#FT_VALIDATE_GXXXX">FT_VALIDATE_GXXXX</a> for possible values.</p>
</td></tr>
<tr valign=top><td><b>table_length</b></td><td>
<p>The size of the &lsquo;tables&rsquo; array. Normally, <a href="ft2-gx_validation.html#FT_VALIDATE_GX_LENGTH">FT_VALIDATE_GX_LENGTH</a> should be passed.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>output</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>tables</b></td><td>
<p>The array where all validated sfnt tables are stored. The array itself must be allocated by a client.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td>
<p>FreeType error code. 0&nbsp;means success.</p>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td>
<p>This function only works with TrueTypeGX fonts, returning an error otherwise.</p>
<p>After use, the application should deallocate the buffers pointed to by each &lsquo;tables&rsquo; element, by calling <a href="ft2-gx_validation.html#FT_TrueTypeGX_Free">FT_TrueTypeGX_Free</a>. A NULL value indicates that the table either doesn't exist in the font, the application hasn't asked for validation, or the validator doesn't have the ability to validate the sfnt table.</p>
</td></tr></table>
</td></tr></table>
<hr width="75%">
<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
<td width="100%"></td>
<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>

<table align=center width="75%"><tr><td>
<h4><a name="FT_TrueTypeGX_Free">FT_TrueTypeGX_Free</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>

  FT_EXPORT( <span class="keyword">void</span> )
  <b>FT_TrueTypeGX_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 );

</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Free the buffer allocated by TrueTypeGX validator.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>face</b></td><td>
<p>A handle to the input face.</p>
</td></tr>
<tr valign=top><td><b>table</b></td><td>
<p>The pointer to the buffer allocated by <a href="ft2-gx_validation.html#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a>.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td>
<p>This function must be used to free the buffer allocated by <a href="ft2-gx_validation.html#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a> only.</p>
</td></tr></table>
</td></tr></table>
<hr width="75%">
<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
<td width="100%"></td>
<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>

<table align=center width="75%"><tr><td>
<h4><a name="FT_VALIDATE_CKERNXXX">FT_VALIDATE_CKERNXXX</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>

#define <a href="ft2-gx_validation.html#FT_VALIDATE_CKERNXXX">FT_VALIDATE_MS</a>     ( FT_VALIDATE_GX_START &lt;&lt; 0 )
#define <a href="ft2-gx_validation.html#FT_VALIDATE_CKERNXXX">FT_VALIDATE_APPLE</a>  ( FT_VALIDATE_GX_START &lt;&lt; 1 )

#define <a href="ft2-gx_validation.html#FT_VALIDATE_CKERNXXX">FT_VALIDATE_CKERN</a>  ( <a href="ft2-gx_validation.html#FT_VALIDATE_CKERNXXX">FT_VALIDATE_MS</a> | <a href="ft2-gx_validation.html#FT_VALIDATE_CKERNXXX">FT_VALIDATE_APPLE</a> )

</pre></table><br>
<table align=center width="87%"><tr><td>
<p>A list of bit-field constants used with <a href="ft2-gx_validation.html#FT_ClassicKern_Validate">FT_ClassicKern_Validate</a> to indicate the classic kern dialect or dialects. If the selected type doesn't fit, <a href="ft2-gx_validation.html#FT_ClassicKern_Validate">FT_ClassicKern_Validate</a> regards the table as invalid.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>values</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>FT_VALIDATE_MS</b></td><td>
<p>Handle the &lsquo;kern&rsquo; table as a classic Microsoft kern table.</p>
</td></tr>
<tr valign=top><td><b>FT_VALIDATE_APPLE</b></td><td>
<p>Handle the &lsquo;kern&rsquo; table as a classic Apple kern table.</p>
</td></tr>
<tr valign=top><td><b>FT_VALIDATE_CKERN</b></td><td>
<p>Handle the &lsquo;kern&rsquo; as either classic Apple or Microsoft kern table.</p>
</td></tr>
</table>
</td></tr></table>
</td></tr></table>
<hr width="75%">
<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
<td width="100%"></td>
<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>

<table align=center width="75%"><tr><td>
<h4><a name="FT_ClassicKern_Validate">FT_ClassicKern_Validate</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>

  FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )
  <b>FT_ClassicKern_Validate</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a>    face,
                           <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a>    validation_flags,
                           <a href="ft2-basic_types.html#FT_Bytes">FT_Bytes</a>  *ckern_table );

</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Validate classic (16-bit format) kern table to assure that the offsets and indices are valid. The idea is that a higher-level library which actually does the text layout can access those tables without error checking (which can be quite time consuming).</p>
<p>The &lsquo;kern&rsquo; table validator in <a href="ft2-gx_validation.html#FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate</a> deals with both the new 32-bit format and the classic 16-bit format, while FT_ClassicKern_Validate only supports the classic 16-bit format.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>face</b></td><td>
<p>A handle to the input face.</p>
</td></tr>
<tr valign=top><td><b>validation_flags</b></td><td>
<p>A bit field which specifies the dialect to be validated. See <a href="ft2-gx_validation.html#FT_VALIDATE_CKERNXXX">FT_VALIDATE_CKERNXXX</a> for possible values.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>output</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>ckern_table</b></td><td>
<p>A pointer to the kern table.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td>
<p>FreeType error code. 0&nbsp;means success.</p>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td>
<p>After use, the application should deallocate the buffers pointed to by &lsquo;ckern_table&rsquo;, by calling <a href="ft2-gx_validation.html#FT_ClassicKern_Free">FT_ClassicKern_Free</a>. A NULL value indicates that the table doesn't exist in the font.</p>
</td></tr></table>
</td></tr></table>
<hr width="75%">
<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
<td width="100%"></td>
<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>

<table align=center width="75%"><tr><td>
<h4><a name="FT_ClassicKern_Free">FT_ClassicKern_Free</a></h4>
<table align=center width="87%"><tr><td>
Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).
</td></tr></table><br>
<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>

  FT_EXPORT( <span class="keyword">void</span> )
  <b>FT_ClassicKern_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 );

</pre></table><br>
<table align=center width="87%"><tr><td>
<p>Free the buffer allocated by classic Kern validator.</p>
</td></tr></table><br>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td>
<p></p>
<table cellpadding=3 border=0>
<tr valign=top><td><b>face</b></td><td>
<p>A handle to the input face.</p>
</td></tr>
<tr valign=top><td><b>table</b></td><td>
<p>The pointer to the buffer that is allocated by <a href="ft2-gx_validation.html#FT_ClassicKern_Validate">FT_ClassicKern_Validate</a>.</p>
</td></tr>
</table>
</td></tr></table>
<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td>
<p>This function must be used to free the buffer allocated by <a href="ft2-gx_validation.html#FT_ClassicKern_Validate">FT_ClassicKern_Validate</a> only.</p>
</td></tr></table>
</td></tr></table>
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