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
|
/*
*
* (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
*
*/
#ifndef __LOOKUPTABLES_H
#define __LOOKUPTABLES_H
/**
* \file
* \internal
*/
#include "LETypes.h"
#include "LayoutTables.h"
#include "LETableReference.h"
U_NAMESPACE_BEGIN
enum LookupTableFormat
{
ltfSimpleArray = 0,
ltfSegmentSingle = 2,
ltfSegmentArray = 4,
ltfSingleTable = 6,
ltfTrimmedArray = 8
};
typedef le_int16 LookupValue;
struct LookupTable
{
le_int16 format;
};
struct LookupSegment
{
TTGlyphID lastGlyph;
TTGlyphID firstGlyph;
LookupValue value;
};
struct LookupSingle
{
TTGlyphID glyph;
LookupValue value;
};
struct BinarySearchLookupTable : LookupTable
{
le_int16 unitSize;
le_int16 nUnits;
le_int16 searchRange;
le_int16 entrySelector;
le_int16 rangeShift;
const LookupSegment *lookupSegment(const LETableReference &base, const LookupSegment *segments, LEGlyphID glyph, LEErrorCode &success) const;
const LookupSingle *lookupSingle(const LETableReference &base, const LookupSingle *entries, LEGlyphID glyph, LEErrorCode &success) const;
};
struct SimpleArrayLookupTable : LookupTable
{
LookupValue valueArray[ANY_NUMBER];
};
LE_VAR_ARRAY(SimpleArrayLookupTable, valueArray)
struct SegmentSingleLookupTable : BinarySearchLookupTable
{
LookupSegment segments[ANY_NUMBER];
};
LE_VAR_ARRAY(SegmentSingleLookupTable, segments)
struct SegmentArrayLookupTable : BinarySearchLookupTable
{
LookupSegment segments[ANY_NUMBER];
};
LE_VAR_ARRAY(SegmentArrayLookupTable, segments)
struct SingleTableLookupTable : BinarySearchLookupTable
{
LookupSingle entries[ANY_NUMBER];
};
LE_VAR_ARRAY(SingleTableLookupTable, entries)
struct TrimmedArrayLookupTable : LookupTable
{
TTGlyphID firstGlyph;
TTGlyphID glyphCount;
LookupValue valueArray[ANY_NUMBER];
};
LE_VAR_ARRAY(TrimmedArrayLookupTable, valueArray)
U_NAMESPACE_END
#endif
|
