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
|
/*
* 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. 1998-2005 - All Rights Reserved
*
*/
#include "LETypes.h"
#include "LEFontInstance.h"
#include "OpenTypeTables.h"
#include "GlyphPositioningTables.h"
#include "PairPositioningSubtables.h"
#include "ValueRecords.h"
#include "GlyphIterator.h"
#include "OpenTypeUtilities.h"
#include "LESwaps.h"
U_NAMESPACE_BEGIN
le_uint32 PairPositioningSubtable::process(const LEReferenceTo<PairPositioningSubtable> &base, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode &success) const
{
switch(SWAPW(subtableFormat))
{
case 0:
return 0;
case 1:
{
const LEReferenceTo<PairPositioningFormat1Subtable> subtable(base, success, (const PairPositioningFormat1Subtable *) this);
if(LE_SUCCESS(success))
return subtable->process(subtable, glyphIterator, fontInstance, success);
else
return 0;
}
case 2:
{
const LEReferenceTo<PairPositioningFormat2Subtable> subtable(base, success, (const PairPositioningFormat2Subtable *) this);
if(LE_SUCCESS(success))
return subtable->process(subtable, glyphIterator, fontInstance, success);
else
return 0;
}
default:
return 0;
}
}
le_uint32 PairPositioningFormat1Subtable::process(const LEReferenceTo<PairPositioningFormat1Subtable> &base, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode &success) const
{
LEGlyphID firstGlyph = glyphIterator->getCurrGlyphID();
le_int32 coverageIndex = getGlyphCoverage(base, firstGlyph, success);
GlyphIterator tempIterator(*glyphIterator);
LEReferenceToArrayOf<Offset> pairSetTableOffsetArrayRef(base, success, pairSetTableOffsetArray, SWAPW(pairSetCount));
if (LE_SUCCESS(success) && coverageIndex >= 0 && glyphIterator->next() && (le_uint32)coverageIndex < pairSetTableOffsetArrayRef.getCount()) {
Offset pairSetTableOffset = SWAPW(pairSetTableOffsetArray[coverageIndex]);
LEReferenceTo<PairSetTable> pairSetTable(base, success, pairSetTableOffset);
if( LE_FAILURE(success) ) return 0;
le_uint16 pairValueCount = SWAPW(pairSetTable->pairValueCount);
LEReferenceTo<PairValueRecord> pairValueRecordArray(pairSetTable, success, pairSetTable->pairValueRecordArray);
if( LE_FAILURE(success) ) return 0;
le_int16 valueRecord1Size = ValueRecord::getSize(SWAPW(valueFormat1));
le_int16 valueRecord2Size = ValueRecord::getSize(SWAPW(valueFormat2));
le_int16 recordSize = sizeof(PairValueRecord) - sizeof(ValueRecord) + valueRecord1Size + valueRecord2Size;
LEGlyphID secondGlyph = glyphIterator->getCurrGlyphID();
LEReferenceTo<PairValueRecord> pairValueRecord;
if (pairValueCount != 0) {
pairValueRecord = findPairValueRecord((TTGlyphID) LE_GET_GLYPH(secondGlyph), pairValueRecordArray, pairValueCount, recordSize, success);
}
if (pairValueRecord.isEmpty() || LE_FAILURE(success)) {
return 0;
}
if (valueFormat1 != 0) {
pairValueRecord->valueRecord1.adjustPosition(SWAPW(valueFormat1), base, tempIterator, fontInstance, success);
}
if (valueFormat2 != 0) {
LEReferenceTo<ValueRecord> valueRecord2(base, success, ((char *) &pairValueRecord->valueRecord1 + valueRecord1Size));
if(LE_SUCCESS(success)) {
valueRecord2->adjustPosition(SWAPW(valueFormat2), base, *glyphIterator, fontInstance, success);
}
}
// back up glyphIterator so second glyph can be
// first glyph in the next pair
glyphIterator->prev();
return 1;
}
return 0;
}
le_uint32 PairPositioningFormat2Subtable::process(const LEReferenceTo<PairPositioningFormat2Subtable> &base, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode &success) const
{
LEGlyphID firstGlyph = glyphIterator->getCurrGlyphID();
le_int32 coverageIndex = getGlyphCoverage(base, firstGlyph, success);
if (LE_FAILURE(success)) {
return 0;
}
GlyphIterator tempIterator(*glyphIterator);
if (coverageIndex >= 0 && glyphIterator->next()) {
LEGlyphID secondGlyph = glyphIterator->getCurrGlyphID();
const LEReferenceTo<ClassDefinitionTable> classDef1(base, success, SWAPW(classDef1Offset));
const LEReferenceTo<ClassDefinitionTable> classDef2(base, success, SWAPW(classDef2Offset));
le_int32 class1 = classDef1->getGlyphClass(classDef1, firstGlyph, success);
le_int32 class2 = classDef2->getGlyphClass(classDef2, secondGlyph, success);
le_int16 valueRecord1Size = ValueRecord::getSize(SWAPW(valueFormat1));
le_int16 valueRecord2Size = ValueRecord::getSize(SWAPW(valueFormat2));
le_int16 class2RecordSize = valueRecord1Size + valueRecord2Size;
le_int16 class1RecordSize = class2RecordSize * SWAPW(class2Count);
const LEReferenceTo<Class1Record> class1Record(base, success, (const Class1Record *) ((char *) class1RecordArray + (class1RecordSize * class1)));
const LEReferenceTo<Class2Record> class2Record(base, success, (const Class2Record *) ((char *) class1Record->class2RecordArray + (class2RecordSize * class2)));
if( LE_SUCCESS(success) ) {
if (valueFormat1 != 0) {
class2Record->valueRecord1.adjustPosition(SWAPW(valueFormat1), base, tempIterator, fontInstance, success);
}
if (valueFormat2 != 0) {
const LEReferenceTo<ValueRecord> valueRecord2(base, success, ((char *) &class2Record->valueRecord1) + valueRecord1Size);
LEReferenceTo<PairPositioningFormat2Subtable> thisRef(base, success, this);
if(LE_SUCCESS(success)) {
valueRecord2->adjustPosition(SWAPW(valueFormat2), thisRef, *glyphIterator, fontInstance, success);
}
}
}
// back up glyphIterator so second glyph can be
// first glyph in the next pair
glyphIterator->prev();
return 1;
}
return 0;
}
LEReferenceTo<PairValueRecord>
PairPositioningFormat1Subtable::findPairValueRecord(TTGlyphID glyphID, LEReferenceTo<PairValueRecord>& records,
le_uint16 recordCount,
le_uint16 recordSize, LEErrorCode &success) const
{
#if 1
// The OpenType spec. says that the ValueRecord table is
// sorted by secondGlyph. Unfortunately, there are fonts
// around that have an unsorted ValueRecord table.
LEReferenceTo<PairValueRecord> record(records);
for(le_int32 r = 0; r < recordCount; r += 1) {
if (r > 0) {
record.addOffset(recordSize, success);
}
if(LE_FAILURE(success)) return LEReferenceTo<PairValueRecord>();
if (SWAPW(record->secondGlyph) == glyphID) {
return record;
}
}
#else
#error dead code - not updated.
le_uint8 bit = OpenTypeUtilities::highBit(recordCount);
le_uint16 power = 1 << bit;
le_uint16 extra = (recordCount - power) * recordSize;
le_uint16 probe = power * recordSize;
const PairValueRecord *record = records;
const PairValueRecord *trial = (const PairValueRecord *) ((char *) record + extra);
if (SWAPW(trial->secondGlyph) <= glyphID) {
record = trial;
}
while (probe > recordSize) {
probe >>= 1;
trial = (const PairValueRecord *) ((char *) record + probe);
if (SWAPW(trial->secondGlyph) <= glyphID) {
record = trial;
}
}
if (SWAPW(record->secondGlyph) == glyphID) {
return record;
}
#endif
return LEReferenceTo<PairValueRecord>();
}
U_NAMESPACE_END
|
