diff options
Diffstat (limited to 'tqtinterface/qt4/include/private/qt4_harfbuzz/src/harfbuzz-open.c')
| -rw-r--r-- | tqtinterface/qt4/include/private/qt4_harfbuzz/src/harfbuzz-open.c | 1433 |
1 files changed, 0 insertions, 1433 deletions
diff --git a/tqtinterface/qt4/include/private/qt4_harfbuzz/src/harfbuzz-open.c b/tqtinterface/qt4/include/private/qt4_harfbuzz/src/harfbuzz-open.c deleted file mode 100644 index f12f5b7..0000000 --- a/tqtinterface/qt4/include/private/qt4_harfbuzz/src/harfbuzz-open.c +++ /dev/null @@ -1,1433 +0,0 @@ -/* - * Copyright (C) 1998-2004 David Turner and Werner Lemberg - * Copyright (C) 2006 Behdad Esfahbod - * - * This is part of HarfBuzz, an OpenType Layout engine library. - * - * Permission is hereby granted, without written agreement and without - * license or royalty fees, to use, copy, modify, and distribute this - * software and its documentation for any purpose, provided that the - * above copyright notice and the following two paragraphs appear in - * all copies of this software. - * - * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR - * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES - * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN - * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH - * DAMAGE. - * - * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, - * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND - * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS - * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO - * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. - */ - -#include "harfbuzz-impl.h" -#include "harfbuzz-open-private.h" - - -/*************************** - * Script related functions - ***************************/ - - -/* LangSys */ - -static HB_Error Load_LangSys( HB_LangSys* ls, - HB_Stream stream ) -{ - HB_Error error; - HB_UShort n, count; - HB_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, HB_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 HB_Err_Ok; -} - - -static void Free_LangSys( HB_LangSys* ls ) -{ - FREE( ls->FeatureIndex ); -} - - -/* Script */ - -static HB_Error Load_Script( HB_ScriptTable* s, - HB_Stream stream ) -{ - HB_Error error; - HB_UShort n, m, count; - HB_UInt cur_offset, new_offset, base_offset; - - HB_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, - stream ) ) != HB_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 = HB_Err_Not_Covered; - goto Fail2; - } - - FORGET_Frame(); - - s->LangSysRecord = NULL; - - if ( ALLOC_ARRAY( s->LangSysRecord, count, HB_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, stream ) ) != HB_Err_Ok ) - goto Fail1; - (void)FILE_Seek( cur_offset ); - } - - return HB_Err_Ok; - -Fail1: - for ( m = 0; m < n; m++ ) - Free_LangSys( &lsr[m].LangSys ); - - FREE( s->LangSysRecord ); - -Fail2: - Free_LangSys( &s->DefaultLangSys ); - return error; -} - - -static void Free_Script( HB_ScriptTable* s ) -{ - HB_UShort n, count; - - HB_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 */ - -HB_INTERNAL HB_Error -_HB_OPEN_Load_ScriptList( HB_ScriptList* sl, - HB_Stream stream ) -{ - HB_Error error; - - HB_UShort n, script_count; - HB_UInt cur_offset, new_offset, base_offset; - - HB_ScriptRecord* sr; - - - base_offset = FILE_Pos(); - - if ( ACCESS_Frame( 2L ) ) - return error; - - script_count = GET_UShort(); - - FORGET_Frame(); - - sl->ScriptRecord = NULL; - - if ( ALLOC_ARRAY( sl->ScriptRecord, script_count, HB_ScriptRecord ) ) - return error; - - sr = sl->ScriptRecord; - - sl->ScriptCount= 0; - for ( n = 0; n < script_count; n++ ) - { - if ( ACCESS_Frame( 6L ) ) - goto Fail; - - sr[sl->ScriptCount].ScriptTag = GET_ULong(); - new_offset = GET_UShort() + base_offset; - - FORGET_Frame(); - - cur_offset = FILE_Pos(); - - if ( FILE_Seek( new_offset ) ) - goto Fail; - - error = Load_Script( &sr[sl->ScriptCount].Script, stream ); - if ( error == HB_Err_Ok ) - sl->ScriptCount += 1; - else if ( error != HB_Err_Not_Covered ) - goto Fail; - - (void)FILE_Seek( cur_offset ); - } - - /* Empty tables are harmless and generated by fontforge. - * See http://bugzilla.gnome.org/show_bug.cgi?id=347073 - */ -#if 0 - if ( sl->ScriptCount == 0 ) - { - error = ERR(HB_Err_Invalid_SubTable); - goto Fail; - } -#endif - - return HB_Err_Ok; - -Fail: - for ( n = 0; n < sl->ScriptCount; n++ ) - Free_Script( &sr[n].Script ); - - FREE( sl->ScriptRecord ); - return error; -} - - -HB_INTERNAL void -_HB_OPEN_Free_ScriptList( HB_ScriptList* sl ) -{ - HB_UShort n, count; - - HB_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 HB_Error Load_Feature( HB_Feature* f, - HB_Stream stream ) -{ - HB_Error error; - - HB_UShort n, count; - - HB_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, HB_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 HB_Err_Ok; -} - - -static void Free_Feature( HB_Feature* f ) -{ - FREE( f->LookupListIndex ); -} - - -/* FeatureList */ - -HB_INTERNAL HB_Error -_HB_OPEN_Load_FeatureList( HB_FeatureList* fl, - HB_Stream stream ) -{ - HB_Error error; - - HB_UShort n, m, count; - HB_UInt cur_offset, new_offset, base_offset; - - HB_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, HB_FeatureRecord ) ) - return error; - if ( ALLOC_ARRAY( fl->ApplyOrder, count, HB_UShort ) ) - goto Fail2; - - fl->ApplyCount = 0; - - fr = fl->FeatureRecord; - - for ( n = 0; n < count; n++ ) - { - if ( ACCESS_Frame( 6L ) ) - goto Fail1; - - 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, stream ) ) != HB_Err_Ok ) - goto Fail1; - (void)FILE_Seek( cur_offset ); - } - - return HB_Err_Ok; - -Fail1: - for ( m = 0; m < n; m++ ) - Free_Feature( &fr[m].Feature ); - - FREE( fl->ApplyOrder ); - -Fail2: - FREE( fl->FeatureRecord ); - - return error; -} - - -HB_INTERNAL void -_HB_OPEN_Free_FeatureList( HB_FeatureList* fl ) -{ - HB_UShort n, count; - - HB_FeatureRecord* fr; - - - if ( fl->FeatureRecord ) - { - count = fl->FeatureCount; - fr = fl->FeatureRecord; - - for ( n = 0; n < count; n++ ) - Free_Feature( &fr[n].Feature ); - - FREE( fr ); - } - - FREE( fl->ApplyOrder ); -} - - - -/******************************** - * Lookup List related functions - ********************************/ - -/* the subroutines of the following two functions are defined in - ftxgsub.c and ftxgpos.c respectively */ - - -/* SubTable */ - -static HB_Error Load_SubTable( HB_SubTable* st, - HB_Stream stream, - HB_Type table_type, - HB_UShort lookup_type ) -{ - if ( table_type == HB_Type_GSUB ) - return _HB_GSUB_Load_SubTable ( &st->st.gsub, stream, lookup_type ); - else - return _HB_GPOS_Load_SubTable ( &st->st.gpos, stream, lookup_type ); -} - - -static void Free_SubTable( HB_SubTable* st, - HB_Type table_type, - HB_UShort lookup_type ) -{ - if ( table_type == HB_Type_GSUB ) - _HB_GSUB_Free_SubTable ( &st->st.gsub, lookup_type ); - else - _HB_GPOS_Free_SubTable ( &st->st.gpos, lookup_type ); -} - - -/* Lookup */ - -static HB_Error Load_Lookup( HB_Lookup* l, - HB_Stream stream, - HB_Type type ) -{ - HB_Error error; - - HB_UShort n, m, count; - HB_UInt cur_offset, new_offset, base_offset; - - HB_SubTable* st; - - HB_Bool is_extension = FALSE; - - - 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, HB_SubTable ) ) - return error; - - st = l->SubTable; - - if ( ( type == HB_Type_GSUB && l->LookupType == HB_GSUB_LOOKUP_EXTENSION ) || - ( type == HB_Type_GPOS && l->LookupType == HB_GPOS_LOOKUP_EXTENSION ) ) - is_extension = TRUE; - - 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 ( is_extension ) - { - if ( FILE_Seek( new_offset ) || ACCESS_Frame( 8L ) ) - goto Fail; - - if (GET_UShort() != 1) /* format should be 1 */ - goto Fail; - - l->LookupType = GET_UShort(); - new_offset += GET_ULong(); - - FORGET_Frame(); - } - - if ( FILE_Seek( new_offset ) || - ( error = Load_SubTable( &st[n], stream, - type, l->LookupType ) ) != HB_Err_Ok ) - goto Fail; - (void)FILE_Seek( cur_offset ); - } - - return HB_Err_Ok; - -Fail: - for ( m = 0; m < n; m++ ) - Free_SubTable( &st[m], type, l->LookupType ); - - FREE( l->SubTable ); - return error; -} - - -static void Free_Lookup( HB_Lookup* l, - HB_Type type) -{ - HB_UShort n, count; - - HB_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 */ - -HB_INTERNAL HB_Error -_HB_OPEN_Load_LookupList( HB_LookupList* ll, - HB_Stream stream, - HB_Type type ) -{ - HB_Error error; - - HB_UShort n, m, count; - HB_UInt cur_offset, new_offset, base_offset; - - HB_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, HB_Lookup ) ) - return error; - if ( ALLOC_ARRAY( ll->Properties, count, HB_UInt ) ) - 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], stream, type ) ) != HB_Err_Ok ) - goto Fail1; - (void)FILE_Seek( cur_offset ); - } - - return HB_Err_Ok; - -Fail1: - FREE( ll->Properties ); - - for ( m = 0; m < n; m++ ) - Free_Lookup( &l[m], type ); - -Fail2: - FREE( ll->Lookup ); - return error; -} - - -HB_INTERNAL void -_HB_OPEN_Free_LookupList( HB_LookupList* ll, - HB_Type type ) -{ - HB_UShort n, count; - - HB_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 HB_Error Load_Coverage1( HB_CoverageFormat1* cf1, - HB_Stream stream ) -{ - HB_Error error; - - HB_UShort n, count; - - HB_UShort* ga; - - - if ( ACCESS_Frame( 2L ) ) - return error; - - count = cf1->GlyphCount = GET_UShort(); - - FORGET_Frame(); - - cf1->GlyphArray = NULL; - - if ( ALLOC_ARRAY( cf1->GlyphArray, count, HB_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 HB_Err_Ok; -} - - -static void Free_Coverage1( HB_CoverageFormat1* cf1) -{ - FREE( cf1->GlyphArray ); -} - - -/* CoverageFormat2 */ - -static HB_Error Load_Coverage2( HB_CoverageFormat2* cf2, - HB_Stream stream ) -{ - HB_Error error; - - HB_UShort n, count; - - HB_RangeRecord* rr; - - - if ( ACCESS_Frame( 2L ) ) - return error; - - count = cf2->RangeCount = GET_UShort(); - - FORGET_Frame(); - - cf2->RangeRecord = NULL; - - if ( ALLOC_ARRAY( cf2->RangeRecord, count, HB_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 = ERR(HB_Err_Invalid_SubTable); - goto Fail; - } - } - - FORGET_Frame(); - - return HB_Err_Ok; - -Fail: - FREE( cf2->RangeRecord ); - return error; -} - - -static void Free_Coverage2( HB_CoverageFormat2* cf2 ) -{ - FREE( cf2->RangeRecord ); -} - - -HB_INTERNAL HB_Error -_HB_OPEN_Load_Coverage( HB_Coverage* c, - HB_Stream stream ) -{ - HB_Error error; - - if ( ACCESS_Frame( 2L ) ) - return error; - - c->CoverageFormat = GET_UShort(); - - FORGET_Frame(); - - switch ( c->CoverageFormat ) - { - case 1: return Load_Coverage1( &c->cf.cf1, stream ); - case 2: return Load_Coverage2( &c->cf.cf2, stream ); - default: return ERR(HB_Err_Invalid_SubTable_Format); - } - - return HB_Err_Ok; /* never reached */ -} - - -HB_INTERNAL void -_HB_OPEN_Free_Coverage( HB_Coverage* c ) -{ - switch ( c->CoverageFormat ) - { - case 1: Free_Coverage1( &c->cf.cf1 ); break; - case 2: Free_Coverage2( &c->cf.cf2 ); break; - default: break; - } -} - - -static HB_Error Coverage_Index1( HB_CoverageFormat1* cf1, - HB_UShort glyphID, - HB_UShort* index ) -{ - HB_UShort min, max, new_min, new_max, middle; - - HB_UShort* array = cf1->GlyphArray; - - - /* binary search */ - - if ( cf1->GlyphCount == 0 ) - return HB_Err_Not_Covered; - - 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 HB_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 HB_Err_Not_Covered; -} - - -static HB_Error Coverage_Index2( HB_CoverageFormat2* cf2, - HB_UShort glyphID, - HB_UShort* index ) -{ - HB_UShort min, max, new_min, new_max, middle; - - HB_RangeRecord* rr = cf2->RangeRecord; - - - /* binary search */ - - if ( cf2->RangeCount == 0 ) - return HB_Err_Not_Covered; - - 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 HB_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 HB_Err_Not_Covered; -} - - -HB_INTERNAL HB_Error -_HB_OPEN_Coverage_Index( HB_Coverage* c, - HB_UShort glyphID, - HB_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 ERR(HB_Err_Invalid_SubTable_Format); - } - - return HB_Err_Ok; /* never reached */ -} - - - -/************************************* - * Class Definition related functions - *************************************/ - - -/* ClassDefFormat1 */ - -static HB_Error Load_ClassDef1( HB_ClassDefinition* cd, - HB_UShort limit, - HB_Stream stream ) -{ - HB_Error error; - - HB_UShort n, count; - - HB_UShort* cva; - - HB_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 ERR(HB_Err_Invalid_SubTable); - - cdf1->ClassValueArray = NULL; - - if ( ALLOC_ARRAY( cdf1->ClassValueArray, count, HB_UShort ) ) - return error; - - 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 = ERR(HB_Err_Invalid_SubTable); - goto Fail; - } - } - - FORGET_Frame(); - - return HB_Err_Ok; - -Fail: - FREE( cva ); - - return error; -} - - -static void Free_ClassDef1( HB_ClassDefFormat1* cdf1 ) -{ - FREE( cdf1->ClassValueArray ); -} - - -/* ClassDefFormat2 */ - -static HB_Error Load_ClassDef2( HB_ClassDefinition* cd, - HB_UShort limit, - HB_Stream stream ) -{ - HB_Error error; - - HB_UShort n, count; - - HB_ClassRangeRecord* crr; - - HB_ClassDefFormat2* cdf2; - - - cdf2 = &cd->cd.cd2; - - if ( ACCESS_Frame( 2L ) ) - return error; - - count = GET_UShort(); - cdf2->ClassRangeCount = 0; /* zero for now. we fill with the number of good entries later */ - - FORGET_Frame(); - - cdf2->ClassRangeRecord = NULL; - - if ( ALLOC_ARRAY( cdf2->ClassRangeRecord, count, HB_ClassRangeRecord ) ) - return error; - - 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 ) - { - /* XXX - * Corrupt entry. Skip it. - * This is hit by Nafees Nastaliq font for example - */ - n--; - count--; - } - } - - FORGET_Frame(); - - cdf2->ClassRangeCount = count; - - return HB_Err_Ok; - -Fail: - FREE( crr ); - - return error; -} - - -static void Free_ClassDef2( HB_ClassDefFormat2* cdf2 ) -{ - FREE( cdf2->ClassRangeRecord ); -} - - -/* ClassDefinition */ - -HB_INTERNAL HB_Error -_HB_OPEN_Load_ClassDefinition( HB_ClassDefinition* cd, - HB_UShort limit, - HB_Stream stream ) -{ - HB_Error error; - - if ( ACCESS_Frame( 2L ) ) - return error; - - cd->ClassFormat = GET_UShort(); - - FORGET_Frame(); - - switch ( cd->ClassFormat ) - { - case 1: error = Load_ClassDef1( cd, limit, stream ); break; - case 2: error = Load_ClassDef2( cd, limit, stream ); break; - default: error = ERR(HB_Err_Invalid_SubTable_Format); break; - } - - if ( error ) - return error; - - cd->loaded = TRUE; - - return HB_Err_Ok; -} - - -static HB_Error -_HB_OPEN_Load_EmptyClassDefinition( HB_ClassDefinition* cd ) -{ - HB_Error error; - - cd->ClassFormat = 1; /* Meaningless */ - - if ( ALLOC_ARRAY( cd->cd.cd1.ClassValueArray, 1, HB_UShort ) ) - return error; - - cd->loaded = TRUE; - - return HB_Err_Ok; -} - -HB_INTERNAL HB_Error -_HB_OPEN_Load_EmptyOrClassDefinition( HB_ClassDefinition* cd, - HB_UShort limit, - HB_UInt class_offset, - HB_UInt base_offset, - HB_Stream stream ) -{ - HB_Error error; - HB_UInt cur_offset; - - cur_offset = FILE_Pos(); - - if ( class_offset ) - { - if ( !FILE_Seek( class_offset + base_offset ) ) - error = _HB_OPEN_Load_ClassDefinition( cd, limit, stream ); - } - else - error = _HB_OPEN_Load_EmptyClassDefinition ( cd ); - - if (error == HB_Err_Ok) - (void)FILE_Seek( cur_offset ); /* Changes error as a side-effect */ - - return error; -} - -HB_INTERNAL void -_HB_OPEN_Free_ClassDefinition( HB_ClassDefinition* cd ) -{ - if ( !cd->loaded ) - return; - - switch ( cd->ClassFormat ) - { - case 1: Free_ClassDef1( &cd->cd.cd1 ); break; - case 2: Free_ClassDef2( &cd->cd.cd2 ); break; - default: break; - } -} - - -static HB_Error Get_Class1( HB_ClassDefFormat1* cdf1, - HB_UShort glyphID, - HB_UShort* klass, - HB_UShort* index ) -{ - HB_UShort* cva = cdf1->ClassValueArray; - - - if ( index ) - *index = 0; - - if ( glyphID >= cdf1->StartGlyph && - glyphID < cdf1->StartGlyph + cdf1->GlyphCount ) - { - *klass = cva[glyphID - cdf1->StartGlyph]; - return HB_Err_Ok; - } - else - { - *klass = 0; - return HB_Err_Not_Covered; - } -} - - -/* we need the index value of the last searched class range record - in case of failure for constructed GDEF tables */ - -static HB_Error Get_Class2( HB_ClassDefFormat2* cdf2, - HB_UShort glyphID, - HB_UShort* klass, - HB_UShort* index ) -{ - HB_Error error = HB_Err_Ok; - HB_UShort min, max, new_min, new_max, middle; - - HB_ClassRangeRecord* crr = cdf2->ClassRangeRecord; - - - /* binary search */ - - if ( cdf2->ClassRangeCount == 0 ) - { - *klass = 0; - if ( index ) - *index = 0; - - return HB_Err_Not_Covered; - } - - 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 ) - { - *klass = crr[middle].Class; - error = HB_Err_Ok; - break; - } - else if ( glyphID < crr[middle].Start ) - { - if ( middle == min ) - { - *klass = 0; - error = HB_Err_Not_Covered; - break; - } - new_max = middle - 1; - } - else - { - if ( middle == max ) - { - *klass = 0; - error = HB_Err_Not_Covered; - break; - } - new_min = middle + 1; - } - } while ( min < max ); - - if ( index ) - *index = middle; - - return error; -} - - -HB_INTERNAL HB_Error -_HB_OPEN_Get_Class( HB_ClassDefinition* cd, - HB_UShort glyphID, - HB_UShort* klass, - HB_UShort* index ) -{ - switch ( cd->ClassFormat ) - { - case 1: return Get_Class1( &cd->cd.cd1, glyphID, klass, index ); - case 2: return Get_Class2( &cd->cd.cd2, glyphID, klass, index ); - default: return ERR(HB_Err_Invalid_SubTable_Format); - } - - return HB_Err_Ok; /* never reached */ -} - - - -/*************************** - * Device related functions - ***************************/ - - -HB_INTERNAL HB_Error -_HB_OPEN_Load_Device( HB_Device** device, - HB_Stream stream ) -{ - HB_Device* d; - HB_Error error; - - HB_UShort n, count; - - HB_UShort* dv; - - - if ( ACCESS_Frame( 6L ) ) - return error; - - if ( ALLOC( *device, sizeof(HB_Device)) ) - { - *device = 0; - return error; - } - - d = *device; - - d->StartSize = GET_UShort(); - d->EndSize = GET_UShort(); - d->DeltaFormat = GET_UShort(); - - FORGET_Frame(); - - d->DeltaValue = NULL; - - if ( d->StartSize > d->EndSize || - d->DeltaFormat == 0 || d->DeltaFormat > 3 ) - { - /* XXX - * I've seen fontforge generate DeltaFormat == 0. - * Just return Ok and let the NULL DeltaValue disable - * this table. - */ - return HB_Err_Ok; - } - - count = ( ( d->EndSize - d->StartSize + 1 ) >> - ( 4 - d->DeltaFormat ) ) + 1; - - if ( ALLOC_ARRAY( d->DeltaValue, count, HB_UShort ) ) - { - FREE( *device ); - *device = 0; - return error; - } - - if ( ACCESS_Frame( count * 2L ) ) - { - FREE( d->DeltaValue ); - FREE( *device ); - *device = 0; - return error; - } - - dv = d->DeltaValue; - - for ( n = 0; n < count; n++ ) - dv[n] = GET_UShort(); - - FORGET_Frame(); - - return HB_Err_Ok; -} - - -HB_INTERNAL void -_HB_OPEN_Free_Device( HB_Device* d ) -{ - if ( d ) - { - FREE( d->DeltaValue ); - FREE( d ); - } -} - - -/* 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 */ - -HB_INTERNAL HB_Error -_HB_OPEN_Get_Device( HB_Device* d, - HB_UShort size, - HB_Short* value ) -{ - HB_UShort byte, bits, mask, s; - - if ( d && d->DeltaValue && size >= d->StartSize && size <= d->EndSize ) - { - HB_UShort f = d->DeltaFormat; - 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 = (HB_Short)( bits & mask ); - - /* conversion to a signed value */ - - if ( *value >= ( ( mask + 1 ) >> 1 ) ) - *value -= mask + 1; - - return HB_Err_Ok; - } - else - { - *value = 0; - return HB_Err_Not_Covered; - } -} - - -/* END */ |