diff options
Diffstat (limited to 'Build/source/libs/libttf/extend/ftxopen.c')
-rw-r--r-- | Build/source/libs/libttf/extend/ftxopen.c | 1439 |
1 files changed, 0 insertions, 1439 deletions
diff --git a/Build/source/libs/libttf/extend/ftxopen.c b/Build/source/libs/libttf/extend/ftxopen.c deleted file mode 100644 index bbf08bd1991..00000000000 --- a/Build/source/libs/libttf/extend/ftxopen.c +++ /dev/null @@ -1,1439 +0,0 @@ -/******************************************************************* - * - * ftxopen.c - * - * TrueType Open common table support. - * - * Copyright 1996-2000 by - * 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. - * - ******************************************************************/ - -#include "tttypes.h" -#include "ttload.h" -#include "ttextend.h" -#include "ttmemory.h" -#include "ttfile.h" - -#include "ftxopen.h" -#include "ftxopenf.h" - - - /*************************** - * Script related functions - ***************************/ - - - /* LangSys */ - - static TT_Error Load_LangSys( TTO_LangSys* ls, - PFace input ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - UShort n, count; - - UShort* fi; - - - if ( ACCESS_Frame( 6L ) ) - return error; - - ls->LookupOrderOffset = GET_UShort(); /* should be 0 */ - ls->ReqFeatureIndex = GET_UShort(); - count = ls->FeatureCount = GET_UShort(); - - FORGET_Frame(); - - ls->FeatureIndex = NULL; - - if ( ALLOC_ARRAY( ls->FeatureIndex, count, UShort ) ) - return error; - - if ( ACCESS_Frame( count * 2L ) ) - { - FREE( ls->FeatureIndex ); - return error; - } - - fi = ls->FeatureIndex; - - for ( n = 0; n < count; n++ ) - fi[n] = GET_UShort(); - - FORGET_Frame(); - - return TT_Err_Ok; - } - - - static void Free_LangSys( TTO_LangSys* ls ) - { - FREE( ls->FeatureIndex ); - } - - - /* Script */ - - static TT_Error Load_Script( TTO_Script* s, - PFace input ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - UShort n, count; - ULong cur_offset, new_offset, base_offset; - - TTO_LangSysRecord* lsr; - - - base_offset = FILE_Pos(); - - if ( ACCESS_Frame( 2L ) ) - return error; - - new_offset = GET_UShort() + base_offset; - - FORGET_Frame(); - - if ( new_offset != base_offset ) /* not a NULL offset */ - { - cur_offset = FILE_Pos(); - if ( FILE_Seek( new_offset ) || - ( error = Load_LangSys( &s->DefaultLangSys, - input ) ) != TT_Err_Ok ) - return error; - (void)FILE_Seek( cur_offset ); - } - else - { - /* we create a DefaultLangSys table with no entries */ - - s->DefaultLangSys.LookupOrderOffset = 0; - s->DefaultLangSys.ReqFeatureIndex = 0xFFFF; - s->DefaultLangSys.FeatureCount = 0; - s->DefaultLangSys.FeatureIndex = NULL; - } - - if ( ACCESS_Frame( 2L ) ) - goto Fail2; - - count = s->LangSysCount = GET_UShort(); - - /* safety check; otherwise the official handling of TrueType Open - fonts won't work */ - - if ( s->LangSysCount == 0 && s->DefaultLangSys.FeatureCount == 0 ) - { - error = TTO_Err_Invalid_SubTable; - goto Fail2; - } - - FORGET_Frame(); - - s->LangSysRecord = NULL; - - if ( ALLOC_ARRAY( s->LangSysRecord, count, TTO_LangSysRecord ) ) - goto Fail2; - - lsr = s->LangSysRecord; - - for ( n = 0; n < count; n++ ) - { - if ( ACCESS_Frame( 6L ) ) - goto Fail1; - - lsr[n].LangSysTag = GET_ULong(); - new_offset = GET_UShort() + base_offset; - - FORGET_Frame(); - - cur_offset = FILE_Pos(); - if ( FILE_Seek( new_offset ) || - ( error = Load_LangSys( &lsr[n].LangSys, input ) ) != TT_Err_Ok ) - goto Fail1; - (void)FILE_Seek( cur_offset ); - } - - return TT_Err_Ok; - - Fail1: - for ( n = 0; n < count; n++ ) - Free_LangSys( &lsr[n].LangSys ); - - FREE( s->LangSysRecord ); - - Fail2: - Free_LangSys( &s->DefaultLangSys ); - return error; - } - - - static void Free_Script( TTO_Script* s ) - { - UShort n, count; - - TTO_LangSysRecord* lsr; - - - Free_LangSys( &s->DefaultLangSys ); - - if ( s->LangSysRecord ) - { - count = s->LangSysCount; - lsr = s->LangSysRecord; - - for ( n = 0; n < count; n++ ) - Free_LangSys( &lsr[n].LangSys ); - - FREE( lsr ); - } - } - - - /* ScriptList */ - - TT_Error Load_ScriptList( TTO_ScriptList* sl, - PFace input ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - UShort n, count; - ULong cur_offset, new_offset, base_offset; - - TTO_ScriptRecord* sr; - - - base_offset = FILE_Pos(); - - if ( ACCESS_Frame( 2L ) ) - return error; - - count = sl->ScriptCount = GET_UShort(); - - FORGET_Frame(); - - sl->ScriptRecord = NULL; - - if ( ALLOC_ARRAY( sl->ScriptRecord, count, TTO_ScriptRecord ) ) - return error; - - sr = sl->ScriptRecord; - - for ( n = 0; n < count; n++ ) - { - if ( ACCESS_Frame( 6L ) ) - goto Fail; - - sr[n].ScriptTag = GET_ULong(); - new_offset = GET_UShort() + base_offset; - - FORGET_Frame(); - - cur_offset = FILE_Pos(); - if ( FILE_Seek( new_offset ) || - ( error = Load_Script( &sr[n].Script, input ) ) != TT_Err_Ok ) - goto Fail; - (void)FILE_Seek( cur_offset ); - } - - return TT_Err_Ok; - - Fail: - for ( n = 0; n < count; n++ ) - Free_Script( &sr[n].Script ); - - FREE( sl->ScriptRecord ); - return error; - } - - - void Free_ScriptList( TTO_ScriptList* sl ) - { - UShort n, count; - - TTO_ScriptRecord* sr; - - - if ( sl->ScriptRecord ) - { - count = sl->ScriptCount; - sr = sl->ScriptRecord; - - for ( n = 0; n < count; n++ ) - Free_Script( &sr[n].Script ); - - FREE( sr ); - } - } - - - - /********************************* - * Feature List related functions - *********************************/ - - - /* Feature */ - - static TT_Error Load_Feature( TTO_Feature* f, - PFace input ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - UShort n, count; - - UShort* lli; - - - if ( ACCESS_Frame( 4L ) ) - return error; - - f->FeatureParams = GET_UShort(); /* should be 0 */ - count = f->LookupListCount = GET_UShort(); - - FORGET_Frame(); - - f->LookupListIndex = NULL; - - if ( ALLOC_ARRAY( f->LookupListIndex, count, UShort ) ) - return error; - - lli = f->LookupListIndex; - - if ( ACCESS_Frame( count * 2L ) ) - { - FREE( f->LookupListIndex ); - return error; - } - - for ( n = 0; n < count; n++ ) - lli[n] = GET_UShort(); - - FORGET_Frame(); - - return TT_Err_Ok; - } - - - static void Free_Feature( TTO_Feature* f ) - { - FREE( f->LookupListIndex ); - } - - - /* FeatureList */ - - TT_Error Load_FeatureList( TTO_FeatureList* fl, - PFace input ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - UShort n, count; - ULong cur_offset, new_offset, base_offset; - - TTO_FeatureRecord* fr; - - - base_offset = FILE_Pos(); - - if ( ACCESS_Frame( 2L ) ) - return error; - - count = fl->FeatureCount = GET_UShort(); - - FORGET_Frame(); - - fl->FeatureRecord = NULL; - - if ( ALLOC_ARRAY( fl->FeatureRecord, count, TTO_FeatureRecord ) ) - return error; - - fr = fl->FeatureRecord; - - for ( n = 0; n < count; n++ ) - { - if ( ACCESS_Frame( 6L ) ) - goto Fail; - - fr[n].FeatureTag = GET_ULong(); - new_offset = GET_UShort() + base_offset; - - FORGET_Frame(); - - cur_offset = FILE_Pos(); - if ( FILE_Seek( new_offset ) || - ( error = Load_Feature( &fr[n].Feature, input ) ) != TT_Err_Ok ) - goto Fail; - (void)FILE_Seek( cur_offset ); - } - - return TT_Err_Ok; - - Fail: - for ( n = 0; n < count; n++ ) - Free_Feature( &fr[n].Feature ); - - FREE( fl->FeatureRecord ); - return error; - } - - - void Free_FeatureList( TTO_FeatureList* fl ) - { - UShort n, count; - - TTO_FeatureRecord* fr; - - - if ( fl->FeatureRecord ) - { - count = fl->FeatureCount; - fr = fl->FeatureRecord; - - for ( n = 0; n < count; n++ ) - Free_Feature( &fr[n].Feature ); - - FREE( fr ); - } - } - - - - /******************************** - * Lookup List related functions - ********************************/ - - /* the subroutines of the following two functions are defined in - ftxgsub.c and ftxgpos.c respectively */ - - - /* SubTable */ - - static TT_Error Load_SubTable( TTO_SubTable* st, - PFace input, - TTO_Type table_type, - UShort lookup_type ) - { - if ( table_type == GSUB ) - switch ( lookup_type ) - { - case GSUB_LOOKUP_SINGLE: - return Load_SingleSubst( &st->st.gsub.single, input ); - - case GSUB_LOOKUP_MULTIPLE: - return Load_MultipleSubst( &st->st.gsub.multiple, input ); - - case GSUB_LOOKUP_ALTERNATE: - return Load_AlternateSubst( &st->st.gsub.alternate, input ); - - case GSUB_LOOKUP_LIGATURE: - return Load_LigatureSubst( &st->st.gsub.ligature, input ); - - case GSUB_LOOKUP_CONTEXT: - return Load_ContextSubst( &st->st.gsub.context, input ); - - case GSUB_LOOKUP_CHAIN: - return Load_ChainContextSubst( &st->st.gsub.chain, input ); - - default: - return TTO_Err_Invalid_GSUB_SubTable_Format; - } - else - switch ( lookup_type ) - { - case GPOS_LOOKUP_SINGLE: - return Load_SinglePos( &st->st.gpos.single, input ); - - case GPOS_LOOKUP_PAIR: - return Load_PairPos( &st->st.gpos.pair, input ); - - case GPOS_LOOKUP_CURSIVE: - return Load_CursivePos( &st->st.gpos.cursive, input ); - - case GPOS_LOOKUP_MARKBASE: - return Load_MarkBasePos( &st->st.gpos.markbase, input ); - - case GPOS_LOOKUP_MARKLIG: - return Load_MarkLigPos( &st->st.gpos.marklig, input ); - - case GPOS_LOOKUP_MARKMARK: - return Load_MarkMarkPos( &st->st.gpos.markmark, input ); - - case GPOS_LOOKUP_CONTEXT: - return Load_ContextPos( &st->st.gpos.context, input ); - - case GPOS_LOOKUP_CHAIN: - return Load_ChainContextPos( &st->st.gpos.chain, input ); - - default: - return TTO_Err_Invalid_GPOS_SubTable_Format; - } - - return TT_Err_Ok; /* never reached */ - } - - - static void Free_SubTable( TTO_SubTable* st, - TTO_Type table_type, - UShort lookup_type ) - { - if ( table_type == GSUB ) - switch ( lookup_type ) - { - case GSUB_LOOKUP_SINGLE: - Free_SingleSubst( &st->st.gsub.single ); - break; - - case GSUB_LOOKUP_MULTIPLE: - Free_MultipleSubst( &st->st.gsub.multiple ); - break; - - case GSUB_LOOKUP_ALTERNATE: - Free_AlternateSubst( &st->st.gsub.alternate ); - break; - - case GSUB_LOOKUP_LIGATURE: - Free_LigatureSubst( &st->st.gsub.ligature ); - break; - - case GSUB_LOOKUP_CONTEXT: - Free_ContextSubst( &st->st.gsub.context ); - break; - - case GSUB_LOOKUP_CHAIN: - Free_ChainContextSubst( &st->st.gsub.chain ); - break; - } - else - switch ( lookup_type ) - { - case GPOS_LOOKUP_SINGLE: - Free_SinglePos( &st->st.gpos.single ); - break; - - case GPOS_LOOKUP_PAIR: - Free_PairPos( &st->st.gpos.pair ); - break; - - case GPOS_LOOKUP_CURSIVE: - Free_CursivePos( &st->st.gpos.cursive ); - break; - - case GPOS_LOOKUP_MARKBASE: - Free_MarkBasePos( &st->st.gpos.markbase ); - break; - - case GPOS_LOOKUP_MARKLIG: - Free_MarkLigPos( &st->st.gpos.marklig ); - break; - - case GPOS_LOOKUP_MARKMARK: - Free_MarkMarkPos( &st->st.gpos.markmark ); - break; - - case GPOS_LOOKUP_CONTEXT: - Free_ContextPos( &st->st.gpos.context ); - break; - - case GPOS_LOOKUP_CHAIN: - Free_ChainContextPos ( &st->st.gpos.chain ); - break; - } - } - - - /* Lookup */ - - static TT_Error Load_Lookup( TTO_Lookup* l, - PFace input, - TTO_Type type ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - UShort n, count; - ULong cur_offset, new_offset, base_offset; - - TTO_SubTable* st; - - - base_offset = FILE_Pos(); - - if ( ACCESS_Frame( 6L ) ) - return error; - - l->LookupType = GET_UShort(); - l->LookupFlag = GET_UShort(); - count = l->SubTableCount = GET_UShort(); - - FORGET_Frame(); - - l->SubTable = NULL; - - if ( ALLOC_ARRAY( l->SubTable, count, TTO_SubTable ) ) - return error; - - st = l->SubTable; - - for ( n = 0; n < count; n++ ) - { - if ( ACCESS_Frame( 2L ) ) - goto Fail; - - new_offset = GET_UShort() + base_offset; - - FORGET_Frame(); - - cur_offset = FILE_Pos(); - if ( FILE_Seek( new_offset ) || - ( error = Load_SubTable( &st[n], input, - type, l->LookupType ) ) != TT_Err_Ok ) - goto Fail; - (void)FILE_Seek( cur_offset ); - } - - return TT_Err_Ok; - - Fail: - for ( n = 0; n < count; n++ ) - Free_SubTable( &st[n], type, l->LookupType ); - - FREE( l->SubTable ); - return error; - } - - - static void Free_Lookup( TTO_Lookup* l, - TTO_Type type ) - { - UShort n, count; - - TTO_SubTable* st; - - - if ( l->SubTable ) - { - count = l->SubTableCount; - st = l->SubTable; - - for ( n = 0; n < count; n++ ) - Free_SubTable( &st[n], type, l->LookupType ); - - FREE( st ); - } - } - - - /* LookupList */ - - TT_Error Load_LookupList( TTO_LookupList* ll, - PFace input, - TTO_Type type ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - UShort n, count; - ULong cur_offset, new_offset, base_offset; - - TTO_Lookup* l; - - - base_offset = FILE_Pos(); - - if ( ACCESS_Frame( 2L ) ) - return error; - - count = ll->LookupCount = GET_UShort(); - - FORGET_Frame(); - - ll->Lookup = NULL; - - if ( ALLOC_ARRAY( ll->Lookup, count, TTO_Lookup ) ) - return error; - if ( ALLOC_ARRAY( ll->Properties, count, UShort ) ) - goto Fail2; - - l = ll->Lookup; - - for ( n = 0; n < count; n++ ) - { - if ( ACCESS_Frame( 2L ) ) - goto Fail1; - - new_offset = GET_UShort() + base_offset; - - FORGET_Frame(); - - cur_offset = FILE_Pos(); - if ( FILE_Seek( new_offset ) || - ( error = Load_Lookup( &l[n], input, type ) ) != TT_Err_Ok ) - goto Fail1; - (void)FILE_Seek( cur_offset ); - } - - return TT_Err_Ok; - - Fail1: - FREE( ll->Properties ); - - for ( n = 0; n < count; n++ ) - Free_Lookup( &l[n], type ); - - Fail2: - FREE( ll->Lookup ); - return error; - } - - - void Free_LookupList( TTO_LookupList* ll, - TTO_Type type ) - { - UShort n, count; - - TTO_Lookup* l; - - - FREE( ll->Properties ); - - if ( ll->Lookup ) - { - count = ll->LookupCount; - l = ll->Lookup; - - for ( n = 0; n < count; n++ ) - Free_Lookup( &l[n], type ); - - FREE( l ); - } - } - - - - /***************************** - * Coverage related functions - *****************************/ - - - /* CoverageFormat1 */ - - static TT_Error Load_Coverage1( TTO_CoverageFormat1* cf1, - PFace input ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - UShort n, count; - - UShort* ga; - - - if ( ACCESS_Frame( 2L ) ) - return error; - - count = cf1->GlyphCount = GET_UShort(); - - FORGET_Frame(); - - cf1->GlyphArray = NULL; - - if ( ALLOC_ARRAY( cf1->GlyphArray, count, UShort ) ) - return error; - - ga = cf1->GlyphArray; - - if ( ACCESS_Frame( count * 2L ) ) - { - FREE( cf1->GlyphArray ); - return error; - } - - for ( n = 0; n < count; n++ ) - ga[n] = GET_UShort(); - - FORGET_Frame(); - - return TT_Err_Ok; - } - - - static void Free_Coverage1( TTO_CoverageFormat1* cf1 ) - { - FREE( cf1->GlyphArray ); - } - - - /* CoverageFormat2 */ - - static TT_Error Load_Coverage2( TTO_CoverageFormat2* cf2, - PFace input ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - UShort n, count; - - TTO_RangeRecord* rr; - - - if ( ACCESS_Frame( 2L ) ) - return error; - - count = cf2->RangeCount = GET_UShort(); - - FORGET_Frame(); - - cf2->RangeRecord = NULL; - - if ( ALLOC_ARRAY( cf2->RangeRecord, count, TTO_RangeRecord ) ) - return error; - - rr = cf2->RangeRecord; - - if ( ACCESS_Frame( count * 6L ) ) - goto Fail; - - for ( n = 0; n < count; n++ ) - { - rr[n].Start = GET_UShort(); - rr[n].End = GET_UShort(); - rr[n].StartCoverageIndex = GET_UShort(); - - /* sanity check; we are limited to 16bit integers */ - if ( rr[n].Start > rr[n].End || - ( rr[n].End - rr[n].Start + (long)rr[n].StartCoverageIndex ) >= - 0x10000L ) - { - error = TTO_Err_Invalid_SubTable; - goto Fail; - } - } - - FORGET_Frame(); - - return TT_Err_Ok; - - Fail: - FREE( cf2->RangeRecord ); - return error; - } - - - static void Free_Coverage2( TTO_CoverageFormat2* cf2 ) - { - FREE( cf2->RangeRecord ); - } - - - TT_Error Load_Coverage( TTO_Coverage* c, - PFace input ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - - if ( ACCESS_Frame( 2L ) ) - return error; - - c->CoverageFormat = GET_UShort(); - - FORGET_Frame(); - - switch ( c->CoverageFormat ) - { - case 1: - return Load_Coverage1( &c->cf.cf1, input ); - - case 2: - return Load_Coverage2( &c->cf.cf2, input ); - - default: - return TTO_Err_Invalid_SubTable_Format; - } - - return TT_Err_Ok; /* never reached */ - } - - - void Free_Coverage( TTO_Coverage* c ) - { - switch ( c->CoverageFormat ) - { - case 1: - Free_Coverage1( &c->cf.cf1 ); - break; - - case 2: - Free_Coverage2( &c->cf.cf2 ); - break; - } - } - - - static TT_Error Coverage_Index1( TTO_CoverageFormat1* cf1, - UShort glyphID, - UShort* index ) - { - UShort min, max, new_min, new_max, middle; - - UShort* array = cf1->GlyphArray; - - - /* binary search */ - - new_min = 0; - new_max = cf1->GlyphCount - 1; - - do - { - min = new_min; - max = new_max; - - /* we use (min + max) / 2 = max - (max - min) / 2 to avoid - overflow and rounding errors */ - - middle = max - ( ( max - min ) >> 1 ); - - if ( glyphID == array[middle] ) - { - *index = middle; - return TT_Err_Ok; - } - else if ( glyphID < array[middle] ) - { - if ( middle == min ) - break; - new_max = middle - 1; - } - else - { - if ( middle == max ) - break; - new_min = middle + 1; - } - } while ( min < max ); - - return TTO_Err_Not_Covered; - } - - - static TT_Error Coverage_Index2( TTO_CoverageFormat2* cf2, - UShort glyphID, - UShort* index ) - { - UShort min, max, new_min, new_max, middle; - - TTO_RangeRecord* rr = cf2->RangeRecord; - - - /* binary search */ - - new_min = 0; - new_max = cf2->RangeCount - 1; - - do - { - min = new_min; - max = new_max; - - /* we use (min + max) / 2 = max - (max - min) / 2 to avoid - overflow and rounding errors */ - - middle = max - ( ( max - min ) >> 1 ); - - if ( glyphID >= rr[middle].Start && glyphID <= rr[middle].End ) - { - *index = rr[middle].StartCoverageIndex + glyphID - rr[middle].Start; - return TT_Err_Ok; - } - else if ( glyphID < rr[middle].Start ) - { - if ( middle == min ) - break; - new_max = middle - 1; - } - else - { - if ( middle == max ) - break; - new_min = middle + 1; - } - } while ( min < max ); - - return TTO_Err_Not_Covered; - } - - - TT_Error Coverage_Index( TTO_Coverage* c, - UShort glyphID, - UShort* index ) - { - switch ( c->CoverageFormat ) - { - case 1: - return Coverage_Index1( &c->cf.cf1, glyphID, index ); - - case 2: - return Coverage_Index2( &c->cf.cf2, glyphID, index ); - - default: - return TTO_Err_Invalid_SubTable_Format; - } - - return TT_Err_Ok; /* never reached */ - } - - - - /************************************* - * Class Definition related functions - *************************************/ - - - /* ClassDefFormat1 */ - - static TT_Error Load_ClassDef1( TTO_ClassDefinition* cd, - UShort limit, - PFace input ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - UShort n, count; - - UShort* cva; - Bool* d; - - TTO_ClassDefFormat1* cdf1; - - - cdf1 = &cd->cd.cd1; - - if ( ACCESS_Frame( 4L ) ) - return error; - - cdf1->StartGlyph = GET_UShort(); - count = cdf1->GlyphCount = GET_UShort(); - - FORGET_Frame(); - - /* sanity check; we are limited to 16bit integers */ - - if ( cdf1->StartGlyph + (long)count >= 0x10000L ) - return TTO_Err_Invalid_SubTable; - - cdf1->ClassValueArray = NULL; - - if ( ALLOC_ARRAY( cdf1->ClassValueArray, count, UShort ) ) - return error; - - d = cd->Defined; - cva = cdf1->ClassValueArray; - - if ( ACCESS_Frame( count * 2L ) ) - goto Fail; - - for ( n = 0; n < count; n++ ) - { - cva[n] = GET_UShort(); - if ( cva[n] >= limit ) - { - error = TTO_Err_Invalid_SubTable; - goto Fail; - } - d[cva[n]] = TRUE; - } - - FORGET_Frame(); - - return TT_Err_Ok; - - Fail: - FREE( cva ); - - return error; - } - - - static void Free_ClassDef1( TTO_ClassDefFormat1* cdf1 ) - { - FREE( cdf1->ClassValueArray ); - } - - - /* ClassDefFormat2 */ - - static TT_Error Load_ClassDef2( TTO_ClassDefinition* cd, - UShort limit, - PFace input ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - UShort n, count; - - TTO_ClassRangeRecord* crr; - Bool* d; - - TTO_ClassDefFormat2* cdf2; - - - cdf2 = &cd->cd.cd2; - - if ( ACCESS_Frame( 2L ) ) - return error; - - count = cdf2->ClassRangeCount = GET_UShort(); - - FORGET_Frame(); - - cdf2->ClassRangeRecord = NULL; - - if ( ALLOC_ARRAY( cdf2->ClassRangeRecord, count, TTO_ClassRangeRecord ) ) - return error; - - d = cd->Defined; - crr = cdf2->ClassRangeRecord; - - if ( ACCESS_Frame( count * 6L ) ) - goto Fail; - - for ( n = 0; n < count; n++ ) - { - crr[n].Start = GET_UShort(); - crr[n].End = GET_UShort(); - crr[n].Class = GET_UShort(); - - /* sanity check */ - - if ( crr[n].Start > crr[n].End || - crr[n].Class >= limit ) - { - error = TTO_Err_Invalid_SubTable; - goto Fail; - } - d[crr[n].Class] = TRUE; - } - - FORGET_Frame(); - - return TT_Err_Ok; - - Fail: - FREE( crr ); - - return error; - } - - - static void Free_ClassDef2( TTO_ClassDefFormat2* cdf2 ) - { - FREE( cdf2->ClassRangeRecord ); - } - - - /* ClassDefinition */ - - TT_Error Load_ClassDefinition( TTO_ClassDefinition* cd, - UShort limit, - PFace input ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - - if ( ALLOC_ARRAY( cd->Defined, limit, Bool ) ) - return error; - - if ( ACCESS_Frame( 2L ) ) - goto Fail; - - cd->ClassFormat = GET_UShort(); - - FORGET_Frame(); - - switch ( cd->ClassFormat ) - { - case 1: - error = Load_ClassDef1( cd, limit, input ); - break; - - case 2: - error = Load_ClassDef2( cd, limit, input ); - break; - - default: - error = TTO_Err_Invalid_SubTable_Format; - break; - } - - if ( error ) - goto Fail; - - cd->loaded = TRUE; - - return TT_Err_Ok; - - Fail: - FREE( cd->Defined ); - return error; - } - - - void Free_ClassDefinition( TTO_ClassDefinition* cd ) - { - if ( !cd->loaded ) - return; - - FREE( cd->Defined ); - - switch ( cd->ClassFormat ) - { - case 1: - Free_ClassDef1( &cd->cd.cd1 ); - break; - - case 2: - Free_ClassDef2( &cd->cd.cd2 ); - break; - } - } - - - static TT_Error Get_Class1( TTO_ClassDefFormat1* cdf1, - UShort glyphID, - UShort* class, - UShort* index ) - { - UShort* cva = cdf1->ClassValueArray; - - - *index = 0; - - if ( glyphID >= cdf1->StartGlyph && - glyphID <= cdf1->StartGlyph + cdf1->GlyphCount ) - { - *class = cva[glyphID - cdf1->StartGlyph]; - return TT_Err_Ok; - } - else - { - *class = 0; - return TTO_Err_Not_Covered; - } - } - - - /* we need the index value of the last searched class range record - in case of failure for constructed GDEF tables */ - - static TT_Error Get_Class2( TTO_ClassDefFormat2* cdf2, - UShort glyphID, - UShort* class, - UShort* index ) - { - TT_Error error = TT_Err_Ok; - UShort min, max, new_min, new_max, middle; - - TTO_ClassRangeRecord* crr = cdf2->ClassRangeRecord; - - - /* binary search */ - - new_min = 0; - new_max = cdf2->ClassRangeCount - 1; - - do - { - min = new_min; - max = new_max; - - /* we use (min + max) / 2 = max - (max - min) / 2 to avoid - overflow and rounding errors */ - - middle = max - ( ( max - min ) >> 1 ); - - if ( glyphID >= crr[middle].Start && glyphID <= crr[middle].End ) - { - *class = crr[middle].Class; - error = TT_Err_Ok; - break; - } - else if ( glyphID < crr[middle].Start ) - { - if ( middle == min ) - { - *class = 0; - error = TTO_Err_Not_Covered; - break; - } - new_max = middle - 1; - } - else - { - if ( middle == max ) - { - *class = 0; - error = TTO_Err_Not_Covered; - break; - } - new_min = middle + 1; - } - } while ( min < max ); - - if ( index ) - *index = middle; - - return error; - } - - - TT_Error Get_Class( TTO_ClassDefinition* cd, - UShort glyphID, - UShort* class, - UShort* index ) - { - switch ( cd->ClassFormat ) - { - case 1: - return Get_Class1( &cd->cd.cd1, glyphID, class, index ); - - case 2: - return Get_Class2( &cd->cd.cd2, glyphID, class, index ); - - default: - return TTO_Err_Invalid_SubTable_Format; - } - - return TT_Err_Ok; /* never reached */ - } - - - - /*************************** - * Device related functions - ***************************/ - - - TT_Error Load_Device( TTO_Device* d, - PFace input ) - { - DEFINE_LOAD_LOCALS( input->stream ); - - UShort n, count; - - UShort* dv; - - - if ( ACCESS_Frame( 6L ) ) - return error; - - d->StartSize = GET_UShort(); - d->EndSize = GET_UShort(); - d->DeltaFormat = GET_UShort(); - - FORGET_Frame(); - - if ( d->StartSize > d->EndSize || - d->DeltaFormat == 0 || d->DeltaFormat > 3 ) - return TTO_Err_Invalid_SubTable; - - d->DeltaValue = NULL; - - count = ( ( d->EndSize - d->StartSize + 1 ) >> - ( 4 - d->DeltaFormat ) ) + 1; - - if ( ALLOC_ARRAY( d->DeltaValue, count, UShort ) ) - return error; - - if ( ACCESS_Frame( count * 2L ) ) - { - FREE( d->DeltaValue ); - return error; - } - - dv = d->DeltaValue; - - for ( n = 0; n < count; n++ ) - dv[n] = GET_UShort(); - - FORGET_Frame(); - - return TT_Err_Ok; - } - - - void Free_Device( TTO_Device* d ) - { - FREE( d->DeltaValue ); - } - - - /* Since we have the delta values stored in compressed form, we must - uncompress it now. To simplify the interface, the function always - returns a meaningful value in `value'; the error is just for - information. - | | - format = 1: 0011223344556677|8899101112131415|... - | | - byte 1 byte 2 - - 00: (byte >> 14) & mask - 11: (byte >> 12) & mask - ... - - mask = 0x0003 - | | - format = 2: 0000111122223333|4444555566667777|... - | | - byte 1 byte 2 - - 0000: (byte >> 12) & mask - 1111: (byte >> 8) & mask - ... - - mask = 0x000F - | | - format = 3: 0000000011111111|2222222233333333|... - | | - byte 1 byte 2 - - 00000000: (byte >> 8) & mask - 11111111: (byte >> 0) & mask - .... - - mask = 0x00FF */ - - TT_Error Get_Device( TTO_Device* d, - UShort size, - Short* value ) - { - UShort byte, bits, mask, f, s; - - - f = d->DeltaFormat; - - if ( size >= d->StartSize && size <= d->EndSize ) - { - s = size - d->StartSize; - byte = d->DeltaValue[s >> ( 4 - f )]; - bits = byte >> ( 16 - ( ( s % ( 1 << ( 4 - f ) ) + 1 ) << f ) ); - mask = 0xFFFF >> ( 16 - ( 1 << f ) ); - - *value = (Short)( bits & mask ); - - /* conversion to a signed value */ - - if ( *value >= ( ( mask + 1 ) >> 1 ) ) - *value -= mask + 1; - - return TT_Err_Ok; - } - else - { - *value = 0; - return TTO_Err_Not_Covered; - } - } - - -/* END */ |