0,0 → 1,125 |
/***************************************************************************/ |
/* */ |
/* gxvmort4.c */ |
/* */ |
/* TrueTypeGX/AAT mort table validation */ |
/* body for type4 (Non-Contextual Glyph Substitution) subtable. */ |
/* */ |
/* Copyright 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */ |
/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
/* */ |
/* This file is part of the FreeType project, and may only be used, */ |
/* modified, and distributed under the terms of the FreeType project */ |
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
/* this file you indicate that you have read the license and */ |
/* understand and accept it fully. */ |
/* */ |
/***************************************************************************/ |
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/***************************************************************************/ |
/* */ |
/* gxvalid is derived from both gxlayout module and otvalid module. */ |
/* Development of gxlayout is supported by the Information-technology */ |
/* Promotion Agency(IPA), Japan. */ |
/* */ |
/***************************************************************************/ |
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#include "gxvmort.h" |
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/*************************************************************************/ |
/* */ |
/* The macro FT_COMPONENT is used in trace mode. It is an implicit */ |
/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ |
/* messages during execution. */ |
/* */ |
#undef FT_COMPONENT |
#define FT_COMPONENT trace_gxvmort |
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static void |
gxv_mort_subtable_type4_lookupval_validate( FT_UShort glyph, |
GXV_LookupValueCPtr value_p, |
GXV_Validator valid ) |
{ |
FT_UNUSED( glyph ); |
|
gxv_glyphid_validate( value_p->u, valid ); |
} |
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/* |
+===============+ --------+ |
| lookup header | | |
+===============+ | |
| BinSrchHeader | | |
+===============+ | |
| lastGlyph[0] | | |
+---------------+ | |
| firstGlyph[0] | | head of lookup table |
+---------------+ | + |
| offset[0] | -> | offset [byte] |
+===============+ | + |
| lastGlyph[1] | | (glyphID - firstGlyph) * 2 [byte] |
+---------------+ | |
| firstGlyph[1] | | |
+---------------+ | |
| offset[1] | | |
+===============+ | |
| |
.... | |
| |
16bit value array | |
+===============+ | |
| value | <-------+ |
.... |
*/ |
|
static GXV_LookupValueDesc |
gxv_mort_subtable_type4_lookupfmt4_transit( |
FT_UShort relative_gindex, |
GXV_LookupValueCPtr base_value_p, |
FT_Bytes lookuptbl_limit, |
GXV_Validator valid ) |
{ |
FT_Bytes p; |
FT_Bytes limit; |
FT_UShort offset; |
GXV_LookupValueDesc value; |
|
/* XXX: check range? */ |
offset = (FT_UShort)( base_value_p->u + |
relative_gindex * sizeof ( FT_UShort ) ); |
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p = valid->lookuptbl_head + offset; |
limit = lookuptbl_limit; |
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GXV_LIMIT_CHECK( 2 ); |
value.u = FT_NEXT_USHORT( p ); |
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return value; |
} |
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FT_LOCAL_DEF( void ) |
gxv_mort_subtable_type4_validate( FT_Bytes table, |
FT_Bytes limit, |
GXV_Validator valid ) |
{ |
FT_Bytes p = table; |
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GXV_NAME_ENTER( "mort chain subtable type4 " |
"(Non-Contextual Glyph Substitution)" ); |
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valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED; |
valid->lookupval_func = gxv_mort_subtable_type4_lookupval_validate; |
valid->lookupfmt4_trans = gxv_mort_subtable_type4_lookupfmt4_transit; |
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gxv_LookupTable_validate( p, limit, valid ); |
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GXV_EXIT; |
} |
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/* END */ |