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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
/*
*
* (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"
#include "LETableReference.h"
U_NAMESPACE_BEGIN
struct SubstitutionLookupRecord
{
le_uint16 sequenceIndex;
le_uint16 lookupListIndex;
};
struct ContextualSubstitutionBase : GlyphSubstitutionSubtable
{
static le_bool matchGlyphIDs(
const LEReferenceToArrayOf<TTGlyphID> &glyphArray, le_uint16 glyphCount, GlyphIterator *glyphIterator,
le_bool backtrack = FALSE);
static le_bool matchGlyphClasses(
const LEReferenceToArrayOf<le_uint16> &classArray, le_uint16 glyphCount, GlyphIterator *glyphIterator,
const LEReferenceTo<ClassDefinitionTable> &classDefinitionTable, LEErrorCode &success, le_bool backtrack = FALSE);
static le_bool matchGlyphCoverages(
const LEReferenceToArrayOf<Offset> &coverageTableOffsetArray, le_uint16 glyphCount,
GlyphIterator *glyphIterator, const LETableReference& offsetBase, LEErrorCode &success, le_bool backtrack = FALSE);
/**
* little shim to wrap the Offset array in range checking
* @private
*/
static le_bool matchGlyphCoverages(
const Offset *coverageTableOffsetArray, le_uint16 glyphCount,
GlyphIterator *glyphIterator, const LETableReference& offsetBase, LEErrorCode &success, le_bool backtrack = FALSE) {
LEReferenceToArrayOf<Offset> ref(offsetBase, success, coverageTableOffsetArray, glyphCount);
if( LE_FAILURE(success) ) { return FALSE; }
return matchGlyphCoverages(ref, glyphCount, glyphIterator, offsetBase, success, backtrack);
}
static void applySubstitutionLookups(
const LookupProcessor *lookupProcessor,
const LEReferenceToArrayOf<SubstitutionLookupRecord>& substLookupRecordArray,
le_uint16 substCount,
GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance,
le_int32 position,
LEErrorCode& success);
};
struct ContextualSubstitutionSubtable : ContextualSubstitutionBase
{
le_uint32 process(const LETableReference &base, const LookupProcessor *lookupProcessor,
GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
};
struct ContextualSubstitutionFormat1Subtable : ContextualSubstitutionSubtable
{
le_uint16 subRuleSetCount;
Offset subRuleSetTableOffsetArray[ANY_NUMBER];
le_uint32 process(const LETableReference &base, const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance, LEErrorCode& success) const;
};
LE_VAR_ARRAY(ContextualSubstitutionFormat1Subtable, subRuleSetTableOffsetArray)
struct SubRuleSetTable
{
le_uint16 subRuleCount;
Offset subRuleTableOffsetArray[ANY_NUMBER];
};
LE_VAR_ARRAY(SubRuleSetTable, subRuleTableOffsetArray)
// NOTE: Multiple variable size arrays!!
struct SubRuleTable
{
le_uint16 glyphCount;
le_uint16 substCount;
TTGlyphID inputGlyphArray[ANY_NUMBER];
//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
};
LE_VAR_ARRAY(SubRuleTable, inputGlyphArray)
struct ContextualSubstitutionFormat2Subtable : ContextualSubstitutionSubtable
{
Offset classDefTableOffset;
le_uint16 subClassSetCount;
Offset subClassSetTableOffsetArray[ANY_NUMBER];
le_uint32 process(const LETableReference &base, const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
};
LE_VAR_ARRAY(ContextualSubstitutionFormat2Subtable, subClassSetTableOffsetArray)
struct SubClassSetTable
{
le_uint16 subClassRuleCount;
Offset subClassRuleTableOffsetArray[ANY_NUMBER];
};
LE_VAR_ARRAY(SubClassSetTable, subClassRuleTableOffsetArray)
// NOTE: Multiple variable size arrays!!
struct SubClassRuleTable
{
le_uint16 glyphCount;
le_uint16 substCount;
le_uint16 classArray[ANY_NUMBER];
//SubstitutionLookupRecord substLookupRecordArray[ANY_NUMBER];
};
LE_VAR_ARRAY(SubClassRuleTable, classArray)
// 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 LETableReference &base, const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance, LEErrorCode& success) const;
};
LE_VAR_ARRAY(ContextualSubstitutionFormat3Subtable, coverageTableOffsetArray)
struct ChainingContextualSubstitutionSubtable : ContextualSubstitutionBase
{
le_uint32 process(const LEReferenceTo<ChainingContextualSubstitutionSubtable> &base, const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance, LEErrorCode& success) const;
};
struct ChainingContextualSubstitutionFormat1Subtable : ChainingContextualSubstitutionSubtable
{
le_uint16 chainSubRuleSetCount;
Offset chainSubRuleSetTableOffsetArray[ANY_NUMBER];
le_uint32 process(const LETableReference &base, const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance, LEErrorCode& success) const;
};
LE_VAR_ARRAY(ChainingContextualSubstitutionFormat1Subtable, chainSubRuleSetTableOffsetArray)
struct ChainSubRuleSetTable
{
le_uint16 chainSubRuleCount;
Offset chainSubRuleTableOffsetArray[ANY_NUMBER];
};
LE_VAR_ARRAY(ChainSubRuleSetTable, chainSubRuleTableOffsetArray)
// 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];
};
LE_VAR_ARRAY(ChainSubRuleTable, backtrackGlyphArray)
struct ChainingContextualSubstitutionFormat2Subtable : ChainingContextualSubstitutionSubtable
{
Offset backtrackClassDefTableOffset;
Offset inputClassDefTableOffset;
Offset lookaheadClassDefTableOffset;
le_uint16 chainSubClassSetCount;
Offset chainSubClassSetTableOffsetArray[ANY_NUMBER];
le_uint32 process(const LETableReference &base, const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
const LEFontInstance *fontInstance, LEErrorCode& success) const;
};
LE_VAR_ARRAY(ChainingContextualSubstitutionFormat2Subtable, chainSubClassSetTableOffsetArray)
struct ChainSubClassSetTable
{
le_uint16 chainSubClassRuleCount;
Offset chainSubClassRuleTableOffsetArray[ANY_NUMBER];
};
LE_VAR_ARRAY(ChainSubClassSetTable, chainSubClassRuleTableOffsetArray)
// 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];
};
LE_VAR_ARRAY(ChainSubClassRuleTable, backtrackClassArray)
// 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 LETableReference &base, const LookupProcessor *lookupProcessor,
GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
};
LE_VAR_ARRAY(ChainingContextualSubstitutionFormat3Subtable, backtrackCoverageTableOffsetArray)
U_NAMESPACE_END
#endif
|
