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path: root/src/hb-old/harfbuzz-gdef.c
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Diffstat (limited to 'src/hb-old/harfbuzz-gdef.c')
-rw-r--r--src/hb-old/harfbuzz-gdef.c1163
1 files changed, 0 insertions, 1163 deletions
diff --git a/src/hb-old/harfbuzz-gdef.c b/src/hb-old/harfbuzz-gdef.c
deleted file mode 100644
index 966b167b..00000000
--- a/src/hb-old/harfbuzz-gdef.c
+++ /dev/null
@@ -1,1163 +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-gdef-private.h"
-#include "harfbuzz-open-private.h"
-
-static HB_Error Load_AttachList( HB_AttachList* al,
- HB_Stream stream );
-static HB_Error Load_LigCaretList( HB_LigCaretList* lcl,
- HB_Stream stream );
-
-static void Free_AttachList( HB_AttachList* al);
-static void Free_LigCaretList( HB_LigCaretList* lcl);
-
-static void Free_NewGlyphClasses( HB_GDEFHeader* gdef);
-
-
-
-/* GDEF glyph classes */
-
-#define UNCLASSIFIED_GLYPH 0
-#define SIMPLE_GLYPH 1
-#define LIGATURE_GLYPH 2
-#define MARK_GLYPH 3
-#define COMPONENT_GLYPH 4
-
-
-
-
-
-
-HB_Error HB_New_GDEF_Table( HB_GDEFHeader** retptr )
-{
- HB_Error error;
-
- HB_GDEFHeader* gdef;
-
- if ( !retptr )
- return ERR(HB_Err_Invalid_Argument);
-
- if ( ALLOC( gdef, sizeof( *gdef ) ) )
- return error;
-
- gdef->GlyphClassDef.loaded = FALSE;
- gdef->AttachList.loaded = FALSE;
- gdef->LigCaretList.loaded = FALSE;
- gdef->MarkAttachClassDef_offset = 0;
- gdef->MarkAttachClassDef.loaded = FALSE;
-
- gdef->LastGlyph = 0;
- gdef->NewGlyphClasses = NULL;
-
- *retptr = gdef;
-
- return HB_Err_Ok;
-}
-
-
-HB_Error HB_Load_GDEF_Table( HB_Stream stream,
- HB_GDEFHeader** retptr )
-{
- HB_Error error;
- HB_UInt cur_offset, new_offset, base_offset;
-
- HB_GDEFHeader* gdef;
-
-
- if ( !retptr )
- return ERR(HB_Err_Invalid_Argument);
-
- if ( GOTO_Table( TTAG_GDEF ) )
- return error;
-
- if (( error = HB_New_GDEF_Table ( &gdef ) ))
- return error;
-
- base_offset = FILE_Pos();
-
- /* skip version */
-
- if ( FILE_Seek( base_offset + 4L ) ||
- ACCESS_Frame( 2L ) )
- goto Fail0;
-
- new_offset = GET_UShort();
-
- FORGET_Frame();
-
- /* all GDEF subtables are optional */
-
- if ( new_offset )
- {
- new_offset += base_offset;
-
- /* only classes 1-4 are allowed here */
-
- cur_offset = FILE_Pos();
- if ( FILE_Seek( new_offset ) ||
- ( error = _HB_OPEN_Load_ClassDefinition( &gdef->GlyphClassDef, 5,
- stream ) ) != HB_Err_Ok )
- goto Fail0;
- (void)FILE_Seek( cur_offset );
- }
-
- if ( ACCESS_Frame( 2L ) )
- goto Fail1;
-
- new_offset = GET_UShort();
-
- FORGET_Frame();
-
- if ( new_offset )
- {
- new_offset += base_offset;
-
- cur_offset = FILE_Pos();
- if ( FILE_Seek( new_offset ) ||
- ( error = Load_AttachList( &gdef->AttachList,
- stream ) ) != HB_Err_Ok )
- goto Fail1;
- (void)FILE_Seek( cur_offset );
- }
-
- if ( ACCESS_Frame( 2L ) )
- goto Fail2;
-
- new_offset = GET_UShort();
-
- FORGET_Frame();
-
- if ( new_offset )
- {
- new_offset += base_offset;
-
- cur_offset = FILE_Pos();
- if ( FILE_Seek( new_offset ) ||
- ( error = Load_LigCaretList( &gdef->LigCaretList,
- stream ) ) != HB_Err_Ok )
- goto Fail2;
- (void)FILE_Seek( cur_offset );
- }
-
- /* OpenType 1.2 has introduced the `MarkAttachClassDef' field. We
- first have to scan the LookupFlag values to find out whether we
- must load it or not. Here we only store the offset of the table. */
-
- if ( ACCESS_Frame( 2L ) )
- goto Fail3;
-
- new_offset = GET_UShort();
-
- FORGET_Frame();
-
- if ( new_offset )
- gdef->MarkAttachClassDef_offset = new_offset + base_offset;
- else
- gdef->MarkAttachClassDef_offset = 0;
-
- *retptr = gdef;
-
- return HB_Err_Ok;
-
-Fail3:
- Free_LigCaretList( &gdef->LigCaretList );
-
-Fail2:
- Free_AttachList( &gdef->AttachList );
-
-Fail1:
- _HB_OPEN_Free_ClassDefinition( &gdef->GlyphClassDef );
-
-Fail0:
- FREE( gdef );
-
- return error;
-}
-
-
-HB_Error HB_Done_GDEF_Table ( HB_GDEFHeader* gdef )
-{
- Free_LigCaretList( &gdef->LigCaretList );
- Free_AttachList( &gdef->AttachList );
- _HB_OPEN_Free_ClassDefinition( &gdef->GlyphClassDef );
- _HB_OPEN_Free_ClassDefinition( &gdef->MarkAttachClassDef );
-
- Free_NewGlyphClasses( gdef );
-
- FREE( gdef );
-
- return HB_Err_Ok;
-}
-
-
-
-
-/*******************************
- * AttachList related functions
- *******************************/
-
-
-/* AttachPoint */
-
-static HB_Error Load_AttachPoint( HB_AttachPoint* ap,
- HB_Stream stream )
-{
- HB_Error error;
-
- HB_UShort n, count;
- HB_UShort* pi;
-
-
- if ( ACCESS_Frame( 2L ) )
- return error;
-
- count = ap->PointCount = GET_UShort();
-
- FORGET_Frame();
-
- ap->PointIndex = NULL;
-
- if ( count )
- {
- if ( ALLOC_ARRAY( ap->PointIndex, count, HB_UShort ) )
- return error;
-
- pi = ap->PointIndex;
-
- if ( ACCESS_Frame( count * 2L ) )
- {
- FREE( pi );
- return error;
- }
-
- for ( n = 0; n < count; n++ )
- pi[n] = GET_UShort();
-
- FORGET_Frame();
- }
-
- return HB_Err_Ok;
-}
-
-
-static void Free_AttachPoint( HB_AttachPoint* ap )
-{
- FREE( ap->PointIndex );
-}
-
-
-/* AttachList */
-
-static HB_Error Load_AttachList( HB_AttachList* al,
- HB_Stream stream )
-{
- HB_Error error;
-
- HB_UShort n, m, count;
- HB_UInt cur_offset, new_offset, base_offset;
-
- HB_AttachPoint* ap;
-
-
- base_offset = FILE_Pos();
-
- if ( ACCESS_Frame( 2L ) )
- return error;
-
- new_offset = GET_UShort() + base_offset;
-
- FORGET_Frame();
-
- cur_offset = FILE_Pos();
- if ( FILE_Seek( new_offset ) ||
- ( error = _HB_OPEN_Load_Coverage( &al->Coverage, stream ) ) != HB_Err_Ok )
- return error;
- (void)FILE_Seek( cur_offset );
-
- if ( ACCESS_Frame( 2L ) )
- goto Fail2;
-
- count = al->GlyphCount = GET_UShort();
-
- FORGET_Frame();
-
- al->AttachPoint = NULL;
-
- if ( ALLOC_ARRAY( al->AttachPoint, count, HB_AttachPoint ) )
- goto Fail2;
-
- ap = al->AttachPoint;
-
- 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_AttachPoint( &ap[n], stream ) ) != HB_Err_Ok )
- goto Fail1;
- (void)FILE_Seek( cur_offset );
- }
-
- al->loaded = TRUE;
-
- return HB_Err_Ok;
-
-Fail1:
- for ( m = 0; m < n; m++ )
- Free_AttachPoint( &ap[m] );
-
- FREE( ap );
-
-Fail2:
- _HB_OPEN_Free_Coverage( &al->Coverage );
- return error;
-}
-
-
-static void Free_AttachList( HB_AttachList* al)
-{
- HB_UShort n, count;
-
- HB_AttachPoint* ap;
-
-
- if ( !al->loaded )
- return;
-
- if ( al->AttachPoint )
- {
- count = al->GlyphCount;
- ap = al->AttachPoint;
-
- for ( n = 0; n < count; n++ )
- Free_AttachPoint( &ap[n] );
-
- FREE( ap );
- }
-
- _HB_OPEN_Free_Coverage( &al->Coverage );
-}
-
-
-
-/*********************************
- * LigCaretList related functions
- *********************************/
-
-
-/* CaretValueFormat1 */
-/* CaretValueFormat2 */
-/* CaretValueFormat3 */
-/* CaretValueFormat4 */
-
-static HB_Error Load_CaretValue( HB_CaretValue* cv,
- HB_Stream stream )
-{
- HB_Error error;
-
- HB_UInt cur_offset, new_offset, base_offset;
-
-
- base_offset = FILE_Pos();
-
- if ( ACCESS_Frame( 2L ) )
- return error;
-
- cv->CaretValueFormat = GET_UShort();
-
- FORGET_Frame();
-
- switch ( cv->CaretValueFormat )
- {
- case 1:
- if ( ACCESS_Frame( 2L ) )
- return error;
-
- cv->cvf.cvf1.Coordinate = GET_Short();
-
- FORGET_Frame();
-
- break;
-
- case 2:
- if ( ACCESS_Frame( 2L ) )
- return error;
-
- cv->cvf.cvf2.CaretValuePoint = GET_UShort();
-
- FORGET_Frame();
-
- break;
-
- case 3:
- if ( ACCESS_Frame( 4L ) )
- return error;
-
- cv->cvf.cvf3.Coordinate = GET_Short();
-
- new_offset = GET_UShort() + base_offset;
-
- FORGET_Frame();
-
- cur_offset = FILE_Pos();
- if ( FILE_Seek( new_offset ) ||
- ( error = _HB_OPEN_Load_Device( &cv->cvf.cvf3.Device,
- stream ) ) != HB_Err_Ok )
- return error;
- (void)FILE_Seek( cur_offset );
-
- break;
-
- case 4:
- if ( ACCESS_Frame( 2L ) )
- return error;
-
-#ifdef HB_SUPPORT_MULTIPLE_MASTER
- cv->cvf.cvf4.IdCaretValue = GET_UShort();
-#else
- (void) GET_UShort();
-#endif
-
- FORGET_Frame();
- break;
-
- default:
- return ERR(HB_Err_Invalid_SubTable_Format);
- }
-
- return HB_Err_Ok;
-}
-
-
-static void Free_CaretValue( HB_CaretValue* cv)
-{
- if ( cv->CaretValueFormat == 3 )
- _HB_OPEN_Free_Device( cv->cvf.cvf3.Device );
-}
-
-
-/* LigGlyph */
-
-static HB_Error Load_LigGlyph( HB_LigGlyph* lg,
- HB_Stream stream )
-{
- HB_Error error;
-
- HB_UShort n, m, count;
- HB_UInt cur_offset, new_offset, base_offset;
-
- HB_CaretValue* cv;
-
-
- base_offset = FILE_Pos();
-
- if ( ACCESS_Frame( 2L ) )
- return error;
-
- count = lg->CaretCount = GET_UShort();
-
- FORGET_Frame();
-
- lg->CaretValue = NULL;
-
- if ( ALLOC_ARRAY( lg->CaretValue, count, HB_CaretValue ) )
- return error;
-
- cv = lg->CaretValue;
-
- 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_CaretValue( &cv[n], stream ) ) != HB_Err_Ok )
- goto Fail;
- (void)FILE_Seek( cur_offset );
- }
-
- return HB_Err_Ok;
-
-Fail:
- for ( m = 0; m < n; m++ )
- Free_CaretValue( &cv[m] );
-
- FREE( cv );
- return error;
-}
-
-
-static void Free_LigGlyph( HB_LigGlyph* lg)
-{
- HB_UShort n, count;
-
- HB_CaretValue* cv;
-
-
- if ( lg->CaretValue )
- {
- count = lg->CaretCount;
- cv = lg->CaretValue;
-
- for ( n = 0; n < count; n++ )
- Free_CaretValue( &cv[n] );
-
- FREE( cv );
- }
-}
-
-
-/* LigCaretList */
-
-static HB_Error Load_LigCaretList( HB_LigCaretList* lcl,
- HB_Stream stream )
-{
- HB_Error error;
-
- HB_UShort m, n, count;
- HB_UInt cur_offset, new_offset, base_offset;
-
- HB_LigGlyph* lg;
-
-
- base_offset = FILE_Pos();
-
- if ( ACCESS_Frame( 2L ) )
- return error;
-
- new_offset = GET_UShort() + base_offset;
-
- FORGET_Frame();
-
- cur_offset = FILE_Pos();
- if ( FILE_Seek( new_offset ) ||
- ( error = _HB_OPEN_Load_Coverage( &lcl->Coverage, stream ) ) != HB_Err_Ok )
- return error;
- (void)FILE_Seek( cur_offset );
-
- if ( ACCESS_Frame( 2L ) )
- goto Fail2;
-
- count = lcl->LigGlyphCount = GET_UShort();
-
- FORGET_Frame();
-
- lcl->LigGlyph = NULL;
-
- if ( ALLOC_ARRAY( lcl->LigGlyph, count, HB_LigGlyph ) )
- goto Fail2;
-
- lg = lcl->LigGlyph;
-
- 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_LigGlyph( &lg[n], stream ) ) != HB_Err_Ok )
- goto Fail1;
- (void)FILE_Seek( cur_offset );
- }
-
- lcl->loaded = TRUE;
-
- return HB_Err_Ok;
-
-Fail1:
- for ( m = 0; m < n; m++ )
- Free_LigGlyph( &lg[m] );
-
- FREE( lg );
-
-Fail2:
- _HB_OPEN_Free_Coverage( &lcl->Coverage );
- return error;
-}
-
-
-static void Free_LigCaretList( HB_LigCaretList* lcl )
-{
- HB_UShort n, count;
-
- HB_LigGlyph* lg;
-
-
- if ( !lcl->loaded )
- return;
-
- if ( lcl->LigGlyph )
- {
- count = lcl->LigGlyphCount;
- lg = lcl->LigGlyph;
-
- for ( n = 0; n < count; n++ )
- Free_LigGlyph( &lg[n] );
-
- FREE( lg );
- }
-
- _HB_OPEN_Free_Coverage( &lcl->Coverage );
-}
-
-
-
-/***********
- * GDEF API
- ***********/
-
-
-static HB_UShort Get_New_Class( HB_GDEFHeader* gdef,
- HB_UShort glyphID,
- HB_UShort index )
-{
- HB_UShort glyph_index, array_index, count;
- HB_UShort byte, bits;
-
- HB_ClassRangeRecord* gcrr;
- HB_UShort** ngc;
-
-
- if ( glyphID >= gdef->LastGlyph )
- return 0;
-
- count = gdef->GlyphClassDef.cd.cd2.ClassRangeCount;
- gcrr = gdef->GlyphClassDef.cd.cd2.ClassRangeRecord;
- ngc = gdef->NewGlyphClasses;
-
- if ( index < count && glyphID < gcrr[index].Start )
- {
- array_index = index;
- if ( index == 0 )
- glyph_index = glyphID;
- else
- glyph_index = glyphID - gcrr[index - 1].End - 1;
- }
- else
- {
- array_index = index + 1;
- glyph_index = glyphID - gcrr[index].End - 1;
- }
-
- byte = ngc[array_index][glyph_index / 4];
- bits = byte >> ( 16 - ( glyph_index % 4 + 1 ) * 4 );
-
- return bits & 0x000F;
-}
-
-
-
-HB_Error HB_GDEF_Get_Glyph_Property( HB_GDEFHeader* gdef,
- HB_UShort glyphID,
- HB_UShort* property )
-{
- HB_UShort class = 0, index = 0; /* shut compiler up */
-
- HB_Error error;
-
-
- if ( !gdef || !property )
- return ERR(HB_Err_Invalid_Argument);
-
- /* first, we check for mark attach classes */
-
- if ( gdef->MarkAttachClassDef.loaded )
- {
- error = _HB_OPEN_Get_Class( &gdef->MarkAttachClassDef, glyphID, &class, &index );
- if ( error && error != HB_Err_Not_Covered )
- return error;
- if ( !error )
- {
- *property = class << 8;
- return HB_Err_Ok;
- }
- }
-
- error = _HB_OPEN_Get_Class( &gdef->GlyphClassDef, glyphID, &class, &index );
- if ( error && error != HB_Err_Not_Covered )
- return error;
-
- /* if we have a constructed class table, check whether additional
- values have been assigned */
-
- if ( error == HB_Err_Not_Covered && gdef->NewGlyphClasses )
- class = Get_New_Class( gdef, glyphID, index );
-
- switch ( class )
- {
- default:
- case UNCLASSIFIED_GLYPH:
- *property = 0;
- break;
-
- case SIMPLE_GLYPH:
- *property = HB_GDEF_BASE_GLYPH;
- break;
-
- case LIGATURE_GLYPH:
- *property = HB_GDEF_LIGATURE;
- break;
-
- case MARK_GLYPH:
- *property = HB_GDEF_MARK;
- break;
-
- case COMPONENT_GLYPH:
- *property = HB_GDEF_COMPONENT;
- break;
- }
-
- return HB_Err_Ok;
-}
-
-
-static HB_Error Make_ClassRange( HB_ClassDefinition* cd,
- HB_UShort start,
- HB_UShort end,
- HB_UShort class )
-{
- HB_Error error;
- HB_UShort index;
-
- HB_ClassDefFormat2* cdf2;
- HB_ClassRangeRecord* crr;
-
-
- cdf2 = &cd->cd.cd2;
-
- if ( REALLOC_ARRAY( cdf2->ClassRangeRecord,
- cdf2->ClassRangeCount + 1 ,
- HB_ClassRangeRecord ) )
- return error;
-
- cdf2->ClassRangeCount++;
-
- crr = cdf2->ClassRangeRecord;
- index = cdf2->ClassRangeCount - 1;
-
- crr[index].Start = start;
- crr[index].End = end;
- crr[index].Class = class;
-
- return HB_Err_Ok;
-}
-
-
-
-HB_Error HB_GDEF_Build_ClassDefinition( HB_GDEFHeader* gdef,
- HB_UShort num_glyphs,
- HB_UShort glyph_count,
- HB_UShort* glyph_array,
- HB_UShort* class_array )
-{
- HB_UShort start, curr_glyph, curr_class;
- HB_UShort n, m, count;
- HB_Error error;
-
- HB_ClassDefinition* gcd;
- HB_ClassRangeRecord* gcrr;
- HB_UShort** ngc;
-
-
- if ( !gdef || !glyph_array || !class_array )
- return ERR(HB_Err_Invalid_Argument);
-
- gcd = &gdef->GlyphClassDef;
-
- /* We build a format 2 table */
-
- gcd->ClassFormat = 2;
-
- gcd->cd.cd2.ClassRangeCount = 0;
- gcd->cd.cd2.ClassRangeRecord = NULL;
-
- start = glyph_array[0];
- curr_class = class_array[0];
- curr_glyph = start;
-
- if ( curr_class >= 5 )
- {
- error = ERR(HB_Err_Invalid_Argument);
- goto Fail4;
- }
-
- glyph_count--;
-
- for ( n = 0; n < glyph_count + 1; n++ )
- {
- if ( curr_glyph == glyph_array[n] && curr_class == class_array[n] )
- {
- if ( n == glyph_count )
- {
- if ( ( error = Make_ClassRange( gcd, start,
- curr_glyph,
- curr_class) ) != HB_Err_Ok )
- goto Fail3;
- }
- else
- {
- if ( curr_glyph == 0xFFFF )
- {
- error = ERR(HB_Err_Invalid_Argument);
- goto Fail3;
- }
- else
- curr_glyph++;
- }
- }
- else
- {
- if ( ( error = Make_ClassRange( gcd, start,
- curr_glyph - 1,
- curr_class) ) != HB_Err_Ok )
- goto Fail3;
-
- if ( curr_glyph > glyph_array[n] )
- {
- error = ERR(HB_Err_Invalid_Argument);
- goto Fail3;
- }
-
- start = glyph_array[n];
- curr_class = class_array[n];
- curr_glyph = start;
-
- if ( curr_class >= 5 )
- {
- error = ERR(HB_Err_Invalid_Argument);
- goto Fail3;
- }
-
- if ( n == glyph_count )
- {
- if ( ( error = Make_ClassRange( gcd, start,
- curr_glyph,
- curr_class) ) != HB_Err_Ok )
- goto Fail3;
- }
- else
- {
- if ( curr_glyph == 0xFFFF )
- {
- error = ERR(HB_Err_Invalid_Argument);
- goto Fail3;
- }
- else
- curr_glyph++;
- }
- }
- }
-
- /* now prepare the arrays for class values assigned during the lookup
- process */
-
- if ( ALLOC_ARRAY( gdef->NewGlyphClasses,
- gcd->cd.cd2.ClassRangeCount + 1, HB_UShort* ) )
- goto Fail3;
-
- count = gcd->cd.cd2.ClassRangeCount;
- gcrr = gcd->cd.cd2.ClassRangeRecord;
- ngc = gdef->NewGlyphClasses;
-
- /* We allocate arrays for all glyphs not covered by the class range
- records. Each element holds four class values. */
-
- if ( count > 0 )
- {
- if ( gcrr[0].Start )
- {
- if ( ALLOC_ARRAY( ngc[0], ( gcrr[0].Start + 3 ) / 4, HB_UShort ) )
- goto Fail2;
- }
-
- for ( n = 1; n < count; n++ )
- {
- if ( gcrr[n].Start - gcrr[n - 1].End > 1 )
- if ( ALLOC_ARRAY( ngc[n],
- ( gcrr[n].Start - gcrr[n - 1].End + 2 ) / 4,
- HB_UShort ) )
- goto Fail1;
- }
-
- if ( gcrr[count - 1].End != num_glyphs - 1 )
- {
- if ( ALLOC_ARRAY( ngc[count],
- ( num_glyphs - gcrr[count - 1].End + 2 ) / 4,
- HB_UShort ) )
- goto Fail1;
- }
- }
- else if ( num_glyphs > 0 )
- {
- if ( ALLOC_ARRAY( ngc[count],
- ( num_glyphs + 3 ) / 4,
- HB_UShort ) )
- goto Fail2;
- }
-
- gdef->LastGlyph = num_glyphs - 1;
-
- gdef->MarkAttachClassDef_offset = 0L;
- gdef->MarkAttachClassDef.loaded = FALSE;
-
- gcd->loaded = TRUE;
-
- return HB_Err_Ok;
-
-Fail1:
- for ( m = 0; m < n; m++ )
- FREE( ngc[m] );
-
-Fail2:
- FREE( gdef->NewGlyphClasses );
-
-Fail3:
- FREE( gcd->cd.cd2.ClassRangeRecord );
-
-Fail4:
- return error;
-}
-
-
-static void Free_NewGlyphClasses( HB_GDEFHeader* gdef )
-{
- HB_UShort** ngc;
- HB_UShort n, count;
-
-
- if ( gdef->NewGlyphClasses )
- {
- count = gdef->GlyphClassDef.cd.cd2.ClassRangeCount + 1;
- ngc = gdef->NewGlyphClasses;
-
- for ( n = 0; n < count; n++ )
- FREE( ngc[n] );
-
- FREE( ngc );
- }
-}
-
-
-HB_INTERNAL HB_Error
-_HB_GDEF_Add_Glyph_Property( HB_GDEFHeader* gdef,
- HB_UShort glyphID,
- HB_UShort property )
-{
- HB_Error error;
- HB_UShort class, new_class, index = 0; /* shut compiler up */
- HB_UShort byte, bits, mask;
- HB_UShort array_index, glyph_index, count;
-
- HB_ClassRangeRecord* gcrr;
- HB_UShort** ngc;
-
-
- error = _HB_OPEN_Get_Class( &gdef->GlyphClassDef, glyphID, &class, &index );
- if ( error && error != HB_Err_Not_Covered )
- return error;
-
- /* we don't accept glyphs covered in `GlyphClassDef' */
-
- if ( !error )
- return HB_Err_Not_Covered;
-
- switch ( property )
- {
- case 0:
- new_class = UNCLASSIFIED_GLYPH;
- break;
-
- case HB_GDEF_BASE_GLYPH:
- new_class = SIMPLE_GLYPH;
- break;
-
- case HB_GDEF_LIGATURE:
- new_class = LIGATURE_GLYPH;
- break;
-
- case HB_GDEF_MARK:
- new_class = MARK_GLYPH;
- break;
-
- case HB_GDEF_COMPONENT:
- new_class = COMPONENT_GLYPH;
- break;
-
- default:
- return ERR(HB_Err_Invalid_Argument);
- }
-
- count = gdef->GlyphClassDef.cd.cd2.ClassRangeCount;
- gcrr = gdef->GlyphClassDef.cd.cd2.ClassRangeRecord;
- ngc = gdef->NewGlyphClasses;
-
- if ( index < count && glyphID < gcrr[index].Start )
- {
- array_index = index;
- if ( index == 0 )
- glyph_index = glyphID;
- else
- glyph_index = glyphID - gcrr[index - 1].End - 1;
- }
- else
- {
- array_index = index + 1;
- glyph_index = glyphID - gcrr[index].End - 1;
- }
-
- byte = ngc[array_index][glyph_index / 4];
- bits = byte >> ( 16 - ( glyph_index % 4 + 1 ) * 4 );
- class = bits & 0x000F;
-
- /* we don't overwrite existing entries */
-
- if ( !class )
- {
- bits = new_class << ( 16 - ( glyph_index % 4 + 1 ) * 4 );
- mask = ~( 0x000F << ( 16 - ( glyph_index % 4 + 1 ) * 4 ) );
-
- ngc[array_index][glyph_index / 4] &= mask;
- ngc[array_index][glyph_index / 4] |= bits;
- }
-
- return HB_Err_Ok;
-}
-
-
-HB_INTERNAL HB_Error
-_HB_GDEF_Check_Property( HB_GDEFHeader* gdef,
- HB_GlyphItem gitem,
- HB_UShort flags,
- HB_UShort* property )
-{
- HB_Error error;
-
- if ( gdef )
- {
- HB_UShort basic_glyph_class;
- HB_UShort desired_attachment_class;
-
- if ( gitem->gproperties == HB_GLYPH_PROPERTIES_UNKNOWN )
- {
- error = HB_GDEF_Get_Glyph_Property( gdef, gitem->gindex, &gitem->gproperties );
- if ( error )
- return error;
- }
-
- *property = gitem->gproperties;
-
- /* If the glyph was found in the MarkAttachmentClass table,
- * then that class value is the high byte of the result,
- * otherwise the low byte contains the basic type of the glyph
- * as defined by the GlyphClassDef table.
- */
- if ( *property & HB_LOOKUP_FLAG_IGNORE_SPECIAL_MARKS )
- basic_glyph_class = HB_GDEF_MARK;
- else
- basic_glyph_class = *property;
-
- /* Return Not_Covered, if, for example, basic_glyph_class
- * is HB_GDEF_LIGATURE and LookFlags includes HB_LOOKUP_FLAG_IGNORE_LIGATURES
- */
- if ( flags & basic_glyph_class )
- return HB_Err_Not_Covered;
-
- /* The high byte of LookupFlags has the meaning
- * "ignore marks of attachment type different than
- * the attachment type specified."
- */
- desired_attachment_class = flags & HB_LOOKUP_FLAG_IGNORE_SPECIAL_MARKS;
- if ( desired_attachment_class )
- {
- if ( basic_glyph_class == HB_GDEF_MARK &&
- *property != desired_attachment_class )
- return HB_Err_Not_Covered;
- }
- } else {
- *property = 0;
- }
-
- return HB_Err_Ok;
-}
-
-HB_INTERNAL HB_Error
-_HB_GDEF_LoadMarkAttachClassDef_From_LookupFlags( HB_GDEFHeader* gdef,
- HB_Stream stream,
- HB_Lookup* lo,
- HB_UShort num_lookups)
-{
- HB_Error error = HB_Err_Ok;
- HB_UShort i;
-
- /* We now check the LookupFlags for values larger than 0xFF to find
- out whether we need to load the `MarkAttachClassDef' field of the
- GDEF table -- this hack is necessary for OpenType 1.2 tables since
- the version field of the GDEF table hasn't been incremented.
-
- For constructed GDEF tables, we only load it if
- `MarkAttachClassDef_offset' is not zero (nevertheless, a build of
- a constructed mark attach table is not supported currently). */
-
- if ( gdef &&
- gdef->MarkAttachClassDef_offset && !gdef->MarkAttachClassDef.loaded )
- {
- for ( i = 0; i < num_lookups; i++ )
- {
-
- if ( lo[i].LookupFlag & HB_LOOKUP_FLAG_IGNORE_SPECIAL_MARKS )
- {
- if ( FILE_Seek( gdef->MarkAttachClassDef_offset ) ||
- ( error = _HB_OPEN_Load_ClassDefinition( &gdef->MarkAttachClassDef,
- 256, stream ) ) != HB_Err_Ok )
- goto Done;
-
- break;
- }
- }
- }
-
-Done:
- return error;
-}
-
-/* END */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-23 16:57:36 +0000