1 /*
2 *
3 * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
4 *
5 */
6
7 #ifndef __LOOKUPS_H
8 #define __LOOKUPS_H
9
10 /**
11 * \file
12 * \internal
13 */
14
15 #include "LETypes.h"
16 #include "OpenTypeTables.h"
17
18 U_NAMESPACE_BEGIN
19
20 enum LookupFlags
21 {
22 lfBaselineIsLogicalEnd = 0x0001, // The MS spec. calls this flag "RightToLeft" but this name is more accurate
23 lfIgnoreBaseGlyphs = 0x0002,
24 lfIgnoreLigatures = 0x0004,
25 lfIgnoreMarks = 0x0008,
26 lfReservedMask = 0x00F0,
27 lfMarkAttachTypeMask = 0xFF00,
28 lfMarkAttachTypeShift = 8
29 };
30
31 struct LookupSubtable
32 {
33 le_uint16 subtableFormat;
34 Offset coverageTableOffset;
35
36 inline le_int32 getGlyphCoverage(const LEReferenceTo<LookupSubtable> &base, LEGlyphID glyphID, LEErrorCode &success) const;
37
38 le_int32 getGlyphCoverage(const LEReferenceTo<LookupSubtable> &base, Offset tableOffset, LEGlyphID glyphID, LEErrorCode &success) const;
39
40 // convenience
41 inline le_int32 getGlyphCoverage(const LETableReference &base, LEGlyphID glyphID, LEErrorCode &success) const;
42
43 inline le_int32 getGlyphCoverage(const LETableReference &base, Offset tableOffset, LEGlyphID glyphID, LEErrorCode &success) const;
44 };
45
46 struct LookupTable
47 {
48 le_uint16 lookupType;
49 le_uint16 lookupFlags;
50 le_uint16 subTableCount;
51 Offset subTableOffsetArray[ANY_NUMBER];
52
53 const LEReferenceTo<LookupSubtable> getLookupSubtable(const LEReferenceTo<LookupTable> &base, le_uint16 subtableIndex, LEErrorCode &success) const;
54 };
55 LE_VAR_ARRAY(LookupTable, subTableOffsetArray)
56
57 struct LookupListTable
58 {
59 le_uint16 lookupCount;
60 Offset lookupTableOffsetArray[ANY_NUMBER];
61
62 const LEReferenceTo<LookupTable> getLookupTable(const LEReferenceTo<LookupListTable> &base, le_uint16 lookupTableIndex, LEErrorCode &success) const;
63 };
LE_VAR_ARRAY(LookupListTable,lookupTableOffsetArray)64 LE_VAR_ARRAY(LookupListTable, lookupTableOffsetArray)
65
66 inline le_int32 LookupSubtable::getGlyphCoverage(const LEReferenceTo<LookupSubtable> &base, LEGlyphID glyphID, LEErrorCode &success) const
67 {
68 return getGlyphCoverage(base, coverageTableOffset, glyphID, success);
69 }
70
getGlyphCoverage(const LETableReference & base,LEGlyphID glyphID,LEErrorCode & success)71 inline le_int32 LookupSubtable::getGlyphCoverage(const LETableReference &base, LEGlyphID glyphID, LEErrorCode &success) const {
72 LEReferenceTo<LookupSubtable> thisRef(base, success, this);
73 return getGlyphCoverage(thisRef, glyphID, success);
74 }
75
getGlyphCoverage(const LETableReference & base,Offset tableOffset,LEGlyphID glyphID,LEErrorCode & success)76 inline le_int32 LookupSubtable::getGlyphCoverage(const LETableReference &base, Offset tableOffset, LEGlyphID glyphID, LEErrorCode &success) const {
77 LEReferenceTo<LookupSubtable> thisRef(base, success, this);
78 return getGlyphCoverage(thisRef, tableOffset, glyphID, success);
79 }
80
81 U_NAMESPACE_END
82 #endif
83