<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<
meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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; }
TrueTypeGX/AAT Validation
<
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>
<
p>This section contains the declaration of functions to validate some TrueTypeGX tables
(feat, mort, morx, bsln, just, kern, opbd, trak, prop, lcar
).<
/p>
<
h4><
a name="FT_VALIDATE_GX_LENGTH">FT_VALIDATE_GX_LENGTH<
/a><
/h4>
Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).
<
table align=center
width="87%"><
tr bgcolor="#D6E8FF"><
td><
pre>
#define <
b>FT_VALIDATE_GX_LENGTH<
/b>
(FT_VALIDATE_GX_LAST_INDEX +
1)
<
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>
<
h4><
a name="FT_VALIDATE_GXXXX">FT_VALIDATE_GXXXX<
/a><
/h4>
Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).
<
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>
)
<
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>
<
table cellpadding=3 border=0>
<
tr valign=top><
td><
b>FT_VALIDATE_feat<
/b><
/td><
td>
<
p>Validate ‘feat’ table.<
/p>
<
tr valign=top><
td><
b>FT_VALIDATE_mort<
/b><
/td><
td>
<
p>Validate ‘mort’ table.<
/p>
<
tr valign=top><
td><
b>FT_VALIDATE_morx<
/b><
/td><
td>
<
p>Validate ‘morx’ table.<
/p>
<
tr valign=top><
td><
b>FT_VALIDATE_bsln<
/b><
/td><
td>
<
p>Validate ‘bsln’ table.<
/p>
<
tr valign=top><
td><
b>FT_VALIDATE_just<
/b><
/td><
td>
<
p>Validate ‘just’ table.<
/p>
<
tr valign=top><
td><
b>FT_VALIDATE_kern<
/b><
/td><
td>
<
p>Validate ‘kern’ table.<
/p>
<
tr valign=top><
td><
b>FT_VALIDATE_opbd<
/b><
/td><
td>
<
p>Validate ‘opbd’ table.<
/p>
<
tr valign=top><
td><
b>FT_VALIDATE_trak<
/b><
/td><
td>
<
p>Validate ‘trak’ table.<
/p>
<
tr valign=top><
td><
b>FT_VALIDATE_prop<
/b><
/td><
td>
<
p>Validate ‘prop’ table.<
/p>
<
tr valign=top><
td><
b>FT_VALIDATE_lcar<
/b><
/td><
td>
<
p>Validate ‘lcar’ table.<
/p>
<
p>Validate all TrueTypeGX tables
(feat, mort, morx, bsln, just, kern, opbd, trak, prop and lcar
).<
/p>
<
h4><
a name="FT_TrueTypeGX_Validate">FT_TrueTypeGX_Validate<
/a><
/h4>
Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).
<
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
);
<
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>
<
table cellpadding=3 border=0>
<
p>A handle to the input
face.<
/p>
<
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>
<
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>
<
table cellpadding=3 border=0>
<
p>The array where all validated sfnt tables are stored. The array itself must be allocated by a client.<
/p>
<
p>FreeType error
code.
0 means success.<
/p>
<
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>
<
table cellpadding=3 border=0>
<
p>Handle the ‘kern’ table as a classic Microsoft kern table.<
/p>
<
tr valign=top><
td><
b>FT_VALIDATE_APPLE<
/b><
/td><
td>
<
p>Handle the ‘kern’ table as a classic Apple kern table.<
/p>
<
tr valign=top><
td><
b>FT_VALIDATE_CKERN<
/b><
/td><
td>
<
p>Handle the ‘kern’ as either classic Apple or Microsoft kern table.<
/p>
<
h4><
a name="FT_ClassicKern_Validate">FT_ClassicKern_Validate<
/a><
/h4>
Defined in FT_GX_VALIDATE_H (freetype/ftgxval.h).
<
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
);
<
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>
<
table cellpadding=3 border=0>
<
p>A handle to the input
face.<
/p>
<
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>
<
table cellpadding=3 border=0>
<
p>A pointer to the kern table.<
/p>
<
p>FreeType error
code.
0 means success.<
/p>
<
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>