diff options
Diffstat (limited to 'src/3rdparty/freetype/src/gxvalid/gxvmort4.c')
| -rw-r--r-- | src/3rdparty/freetype/src/gxvalid/gxvmort4.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/3rdparty/freetype/src/gxvalid/gxvmort4.c b/src/3rdparty/freetype/src/gxvalid/gxvmort4.c new file mode 100644 index 0000000000..a04bc1efaf --- /dev/null +++ b/src/3rdparty/freetype/src/gxvalid/gxvmort4.c @@ -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. */ +/* */ +/***************************************************************************/ + +/***************************************************************************/ +/* */ +/* gxvalid is derived from both gxlayout module and otvalid module. */ +/* Development of gxlayout is supported by the Information-technology */ +/* Promotion Agency(IPA), Japan. */ +/* */ +/***************************************************************************/ + + +#include "gxvmort.h" + + + /*************************************************************************/ + /* */ + /* 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 + + + static void + gxv_mort_subtable_type4_lookupval_validate( FT_UShort glyph, + GXV_LookupValueDesc value, + GXV_Validator valid ) + { + FT_UNUSED( glyph ); + + gxv_glyphid_validate( value.u, valid ); + } + + /* + +===============+ --------+ + | 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_LookupValueDesc base_value, + 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.u + + relative_gindex * sizeof ( FT_UShort ) ); + + p = valid->lookuptbl_head + offset; + limit = lookuptbl_limit; + + GXV_LIMIT_CHECK( 2 ); + value.u = FT_NEXT_USHORT( p ); + + return value; + } + + + FT_LOCAL_DEF( void ) + gxv_mort_subtable_type4_validate( FT_Bytes table, + FT_Bytes limit, + GXV_Validator valid ) + { + FT_Bytes p = table; + + + GXV_NAME_ENTER( "mort chain subtable type4 " + "(Non-Contextual Glyph Substitution)" ); + + valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED; + valid->lookupval_func = gxv_mort_subtable_type4_lookupval_validate; + valid->lookupfmt4_trans = gxv_mort_subtable_type4_lookupfmt4_transit; + + gxv_LookupTable_validate( p, limit, valid ); + + GXV_EXIT; + } + + +/* END */ |