Current Path :
/
usr
/
share
/
doc
/
freetype-devel-2.3.11
/
reference
/
Or
Select Your Path :
Upload File :
New :
File
Dir
//usr/share/doc/freetype-devel-2.3.11/reference/ft2-gx_validation.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>FreeType-2.3.11 API Reference</title> <style type="text/css"> body { font-family: Verdana, Geneva, Arial, Helvetica, serif; color: #000000; background: #FFFFFF; } p { text-align: justify; } h1 { text-align: center; } li { text-align: justify; } td { padding: 0 0.5em 0 0.5em; } td.left { padding: 0 0.5em 0 0.5em; text-align: left; } a:link { color: #0000EF; } a:visited { color: #51188E; } a:hover { color: #FF0000; } span.keyword { font-family: monospace; text-align: left; white-space: pre; color: darkblue; } pre.colored { color: blue; } ul.empty { list-style-type: none; } </style> </head> <body> <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-2.3.11 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> Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h). </td></tr></table><br> <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre> #define <b>FT_VALIDATE_GX_LENGTH</b> (FT_VALIDATE_GX_LAST_INDEX + 1) </pre></table><br> <table align=center width="87%"><tr><td> <p>The number of tables checked in this module. Use it as a parameter for the ‘table-length’ 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 ‘feat’ table.</p> </td></tr> <tr valign=top><td><b>FT_VALIDATE_mort</b></td><td> <p>Validate ‘mort’ table.</p> </td></tr> <tr valign=top><td><b>FT_VALIDATE_morx</b></td><td> <p>Validate ‘morx’ table.</p> </td></tr> <tr valign=top><td><b>FT_VALIDATE_bsln</b></td><td> <p>Validate ‘bsln’ table.</p> </td></tr> <tr valign=top><td><b>FT_VALIDATE_just</b></td><td> <p>Validate ‘just’ table.</p> </td></tr> <tr valign=top><td><b>FT_VALIDATE_kern</b></td><td> <p>Validate ‘kern’ table.</p> </td></tr> <tr valign=top><td><b>FT_VALIDATE_opbd</b></td><td> <p>Validate ‘opbd’ table.</p> </td></tr> <tr valign=top><td><b>FT_VALIDATE_trak</b></td><td> <p>Validate ‘trak’ table.</p> </td></tr> <tr valign=top><td><b>FT_VALIDATE_prop</b></td><td> <p>Validate ‘prop’ table.</p> </td></tr> <tr valign=top><td><b>FT_VALIDATE_lcar</b></td><td> <p>Validate ‘lcar’ 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 ‘tables’ 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 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 ‘tables’ 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 << 0 ) #define <a href="ft2-gx_validation.html#FT_VALIDATE_CKERNXXX">FT_VALIDATE_APPLE</a> ( FT_VALIDATE_GX_START << 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 ‘kern’ table as a classic Microsoft kern table.</p> </td></tr> <tr valign=top><td><b>FT_VALIDATE_APPLE</b></td><td> <p>Handle the ‘kern’ table as a classic Apple kern table.</p> </td></tr> <tr valign=top><td><b>FT_VALIDATE_CKERN</b></td><td> <p>Handle the ‘kern’ 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 ‘kern’ 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 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 ‘ckern_table’, 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> <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> </body> </html>
