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Unified Diff: third_party/harfbuzz/src/harfbuzz-open.c

Issue 384503008: Delete third_party/harfbuzz (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: remove public header Created 6 years, 5 months ago
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Index: third_party/harfbuzz/src/harfbuzz-open.c
diff --git a/third_party/harfbuzz/src/harfbuzz-open.c b/third_party/harfbuzz/src/harfbuzz-open.c
deleted file mode 100644
index 0fe1e4ddb301a112195b946489f68835238c89bf..0000000000000000000000000000000000000000
--- a/third_party/harfbuzz/src/harfbuzz-open.c
+++ /dev/null
@@ -1,1416 +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* d,
- HB_Stream stream )
-{
- HB_Error error;
-
- HB_UShort n, count;
-
- HB_UShort* dv;
-
-
- if ( ACCESS_Frame( 6L ) )
- return error;
-
- 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 ) )
- 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 HB_Err_Ok;
-}
-
-
-HB_INTERNAL void
-_HB_OPEN_Free_Device( HB_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 */
-
-HB_INTERNAL HB_Error
-_HB_OPEN_Get_Device( HB_Device* d,
- HB_UShort size,
- HB_Short* value )
-{
- HB_UShort byte, bits, mask, f, s;
-
-
- f = d->DeltaFormat;
-
- if ( d->DeltaValue && 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 = (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 */
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