| | 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 | }; |
| | 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 | |
| | 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 | |
| | 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 |
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