0,0 → 1,151 |
/***************************************************************************/ |
/* */ |
/* gxvmort0.c */ |
/* */ |
/* TrueTypeGX/AAT mort table validation */ |
/* body for type0 (Indic Script Rearrangement) 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 const char* GXV_Mort_IndicScript_Msg[] = |
{ |
"no change", |
"Ax => xA", |
"xD => Dx", |
"AxD => DxA", |
"ABx => xAB", |
"ABx => xBA", |
"xCD => CDx", |
"xCD => DCx", |
"AxCD => CDxA", |
"AxCD => DCxA", |
"ABxD => DxAB", |
"ABxD => DxBA", |
"ABxCD => CDxAB", |
"ABxCD => CDxBA", |
"ABxCD => DCxAB", |
"ABxCD => DCxBA", |
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}; |
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static void |
gxv_mort_subtable_type0_entry_validate( |
FT_Byte state, |
FT_UShort flags, |
GXV_StateTable_GlyphOffsetCPtr glyphOffset_p, |
FT_Bytes table, |
FT_Bytes limit, |
GXV_Validator valid ) |
{ |
FT_UShort markFirst; |
FT_UShort dontAdvance; |
FT_UShort markLast; |
FT_UShort reserved; |
FT_UShort verb = 0; |
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FT_UNUSED( state ); |
FT_UNUSED( table ); |
FT_UNUSED( limit ); |
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FT_UNUSED( GXV_Mort_IndicScript_Msg[verb] ); /* for the non-debugging */ |
FT_UNUSED( glyphOffset_p ); /* case */ |
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markFirst = (FT_UShort)( ( flags >> 15 ) & 1 ); |
dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 ); |
markLast = (FT_UShort)( ( flags >> 13 ) & 1 ); |
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reserved = (FT_UShort)( flags & 0x1FF0 ); |
verb = (FT_UShort)( flags & 0x000F ); |
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GXV_TRACE(( " IndicScript MorphRule for glyphOffset 0x%04x", |
glyphOffset_p->u )); |
GXV_TRACE(( " markFirst=%01d", markFirst )); |
GXV_TRACE(( " dontAdvance=%01d", dontAdvance )); |
GXV_TRACE(( " markLast=%01d", markLast )); |
GXV_TRACE(( " %02d", verb )); |
GXV_TRACE(( " %s\n", GXV_Mort_IndicScript_Msg[verb] )); |
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if ( markFirst > 0 && markLast > 0 ) |
{ |
GXV_TRACE(( " [odd] a glyph is marked as the first and last" |
" in Indic rearrangement\n" )); |
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA ); |
} |
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if ( markFirst > 0 && dontAdvance > 0 ) |
{ |
GXV_TRACE(( " [odd] the first glyph is marked as dontAdvance" |
" in Indic rearrangement\n" )); |
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA ); |
} |
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if ( 0 < reserved ) |
{ |
GXV_TRACE(( " non-zero bits found in reserved range\n" )); |
GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA ); |
} |
else |
GXV_TRACE(( "\n" )); |
} |
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FT_LOCAL_DEF( void ) |
gxv_mort_subtable_type0_validate( FT_Bytes table, |
FT_Bytes limit, |
GXV_Validator valid ) |
{ |
FT_Bytes p = table; |
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GXV_NAME_ENTER( |
"mort chain subtable type0 (Indic-Script Rearrangement)" ); |
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GXV_LIMIT_CHECK( GXV_STATETABLE_HEADER_SIZE ); |
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valid->statetable.optdata = NULL; |
valid->statetable.optdata_load_func = NULL; |
valid->statetable.subtable_setup_func = NULL; |
valid->statetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE; |
valid->statetable.entry_validate_func = |
gxv_mort_subtable_type0_entry_validate; |
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gxv_StateTable_validate( p, limit, valid ); |
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GXV_EXIT; |
} |
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/* END */ |