1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
*
* (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
*
*/
#ifndef __CONTEXTUALSUBSTITUTIONSUBTABLES_H
#define __CONTEXTUALSUBSTITUTIONSUBTABLES_H
/**
* \file
* \internal
*/
#include "LETypes.h"
#include "LEFontInstance.h"
#include "OpenTypeTables.h"
#include "GlyphSubstitutionTables.h"
#include "GlyphIterator.h"
#include "LookupProcessor.h"
U_NAMESPACE_BEGIN
struct SubstitutionLookupRecord
{
le_uint16 sequenceIndex;
le_uint16 lookupListIndex;
};
struct ContextualSubstitutionBase : GlyphSubstitutionSubtable
{
static le_bool matchGlyphIDs(
const TTGlyphID *glyphArray, le_uint16 glyphCount, GlyphIterator *glyphIterator,
le_bool backtrack = FALSE);
static le_bool matchGlyphClasses(
const le_uint16 *classArray, le_uint16 glyphCount, GlyphIterator *glyphIterator,
const ClassDefinitionTable *classDefinitionTable, le_bool backtrack = FALSE);
static le_bool matchGlyphCoverages(
const Offset *coverageTableOffsetArray, le_uint16 glyphCount,
GlyphIterator *glyphIterator, const char *offsetBase, le_bool backtrack = FALSE);
static void applySubstitutionLookups(
const LookupProcessor *lookupProcessor,
const SubstitutionLookupRecord *substLookupRecordArray,
le_uint16 substCount,
GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance,
le_int32 position);
};
struct ContextualSubstitutionSubtable : ContextualSubstitutionBase
{
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct ContextualSubstitutionFormat1Subtable : ContextualSubstitutionSubtable
{
le_uint16 subRuleSetCount;
Offset subRuleSetTableOffsetArray[ANY_NUMBER];
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct SubRuleSetTable
{
le_uint16 subRuleCount;
Offset subRuleTableOffsetArray[ANY_NUMBER];
};
// NOTE: Multiple variable size arrays!!
struct SubRuleTable
{
le_uint16 glyphCount;
le_uint16 substCount;
TTGlyphID inputGlyphArray[ANY_NUMBER];
//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
};
struct ContextualSubstitutionFormat2Subtable : ContextualSubstitutionSubtable
{
Offset classDefTableOffset;
le_uint16 subClassSetCount;
Offset subClassSetTableOffsetArray[ANY_NUMBER];
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct SubClassSetTable
{
le_uint16 subClassRuleCount;
Offset subClassRuleTableOffsetArray[ANY_NUMBER];
};
// NOTE: Multiple variable size arrays!!
struct SubClassRuleTable
{
le_uint16 glyphCount;
le_uint16 substCount;
le_uint16 classArray[ANY_NUMBER];
//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
};
// NOTE: This isn't a subclass of GlyphSubstitutionSubtable 'cause
// it has an array of coverage tables instead of a single coverage table...
//
// NOTE: Multiple variable size arrays!!
struct ContextualSubstitutionFormat3Subtable
{
le_uint16 substFormat;
le_uint16 glyphCount;
le_uint16 substCount;
Offset coverageTableOffsetArray[ANY_NUMBER];
//SubstitutionLookupRecord substLookupRecord[ANY_NUMBER];
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct ChainingContextualSubstitutionSubtable : ContextualSubstitutionBase
{
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct ChainingContextualSubstitutionFormat1Subtable : ChainingContextualSubstitutionSubtable
{
le_uint16 chainSubRuleSetCount;
Offset chainSubRuleSetTableOffsetArray[ANY_NUMBER];
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct ChainSubRuleSetTable
{
le_uint16 chainSubRuleCount;
Offset chainSubRuleTableOffsetArray[ANY_NUMBER];
};
// NOTE: Multiple variable size arrays!!
struct ChainSubRuleTable
{
le_uint16 backtrackGlyphCount;
TTGlyphID backtrackGlyphArray[ANY_NUMBER];
//le_uint16 inputGlyphCount;
//TTGlyphID inputGlyphArray[ANY_NUMBER];
//le_uint16 lookaheadGlyphCount;
//TTGlyphID lookaheadGlyphArray[ANY_NUMBER];
//le_uint16 substCount;
//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
};
struct ChainingContextualSubstitutionFormat2Subtable : ChainingContextualSubstitutionSubtable
{
Offset backtrackClassDefTableOffset;
Offset inputClassDefTableOffset;
Offset lookaheadClassDefTableOffset;
le_uint16 chainSubClassSetCount;
Offset chainSubClassSetTableOffsetArray[ANY_NUMBER];
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
struct ChainSubClassSetTable
{
le_uint16 chainSubClassRuleCount;
Offset chainSubClassRuleTableOffsetArray[ANY_NUMBER];
};
// NOTE: Multiple variable size arrays!!
struct ChainSubClassRuleTable
{
le_uint16 backtrackGlyphCount;
le_uint16 backtrackClassArray[ANY_NUMBER];
//le_uint16 inputGlyphCount;
//le_uint16 inputClassArray[ANY_NUMBER];
//le_uint16 lookaheadGlyphCount;
//le_uint16 lookaheadClassArray[ANY_NUMBER];
//le_uint16 substCount;
//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
};
// NOTE: This isn't a subclass of GlyphSubstitutionSubtable 'cause
// it has arrays of coverage tables instead of a single coverage table...
//
// NOTE: Multiple variable size arrays!!
struct ChainingContextualSubstitutionFormat3Subtable
{
le_uint16 substFormat;
le_uint16 backtrackGlyphCount;
Offset backtrackCoverageTableOffsetArray[ANY_NUMBER];
//le_uint16 inputGlyphCount;
//Offset inputCoverageTableOffsetArray[ANY_NUMBER];
//le_uint16 lookaheadGlyphCount;
//le_uint16 lookaheadCoverageTableOffsetArray[ANY_NUMBER];
//le_uint16 substCount;
//SubstitutionLookupRecord substLookupRecord[ANY_NUMBER];
le_uint32 process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
};
U_NAMESPACE_END
#endif
|
