| | 1 | /* |
| | 2 | * |
| | 3 | * (C) Copyright IBM Corp. 1998-2016 - All Rights Reserved |
| | 4 | * |
| | 5 | */ |
| | 6 | |
| | 7 | #ifndef __LOOKUPTABLES_H |
| | 8 | #define __LOOKUPTABLES_H |
| | 9 | |
| | 10 | /** |
| | 11 | * \file |
| | 12 | * \internal |
| | 13 | */ |
| | 14 | |
| | 15 | #include "LETypes.h" |
| | 16 | #include "LayoutTables.h" |
| | 17 | #include "LETableReference.h" |
| | 18 | #include "Lookups.h" |
| | 19 | |
| | 20 | U_NAMESPACE_BEGIN |
| | 21 | |
| | 22 | enum LookupTableFormat |
| | 23 | { |
| | 24 | ltfSimpleArray = 0, |
| | 25 | ltfSegmentSingle = 2, |
| | 26 | ltfSegmentArray = 4, |
| | 27 | ltfSingleTable = 6, |
| | 28 | ltfTrimmedArray = 8 |
| | 29 | }; |
| | 30 | |
| | 31 | typedef le_int16 LookupValue; |
| | 32 | |
| | 33 | // Different from struct LookupTable in Lookups.h. |
| | 34 | struct LookupTableBase |
| | 35 | { |
| | 36 | le_int16 format; |
| | 37 | }; |
| | 38 | |
| | 39 | struct LookupSegment |
| | 40 | { |
| | 41 | TTGlyphID lastGlyph; |
| | 42 | TTGlyphID firstGlyph; |
| | 43 | LookupValue value; |
| | 44 | }; |
| | 45 | |
| | 46 | struct LookupSingle |
| | 47 | { |
| | 48 | TTGlyphID glyph; |
| | 49 | LookupValue value; |
| | 50 | }; |
| | 51 | |
| | 52 | struct BinarySearchLookupTable : LookupTableBase |
| | 53 | { |
| | 54 | le_int16 unitSize; |
| | 55 | le_int16 nUnits; |
| | 56 | le_int16 searchRange; |
| | 57 | le_int16 entrySelector; |
| | 58 | le_int16 rangeShift; |
| | 59 | |
| | 60 | const LookupSegment *lookupSegment(const LETableReference &base, const LookupSegment *segments, LEGlyphID glyph, LEErrorCode &success) const; |
| | 61 | |
| | 62 | const LookupSingle *lookupSingle(const LETableReference &base, const LookupSingle *entries, LEGlyphID glyph, LEErrorCode &success) const; |
| | 63 | }; |
| | 64 | |
| | 65 | struct SimpleArrayLookupTable : LookupTableBase |
| | 66 | { |
| | 67 | LookupValue valueArray[ANY_NUMBER]; |
| | 68 | }; |
| | 69 | LE_VAR_ARRAY(SimpleArrayLookupTable, valueArray) |
| | 70 | |
| | 71 | struct SegmentSingleLookupTable : BinarySearchLookupTable |
| | 72 | { |
| | 73 | LookupSegment segments[ANY_NUMBER]; |
| | 74 | }; |
| | 75 | LE_VAR_ARRAY(SegmentSingleLookupTable, segments) |
| | 76 | |
| | 77 | struct SegmentArrayLookupTable : BinarySearchLookupTable |
| | 78 | { |
| | 79 | LookupSegment segments[ANY_NUMBER]; |
| | 80 | }; |
| | 81 | LE_VAR_ARRAY(SegmentArrayLookupTable, segments) |
| | 82 | |
| | 83 | struct SingleTableLookupTable : BinarySearchLookupTable |
| | 84 | { |
| | 85 | LookupSingle entries[ANY_NUMBER]; |
| | 86 | }; |
| | 87 | LE_VAR_ARRAY(SingleTableLookupTable, entries) |
| | 88 | |
| | 89 | struct TrimmedArrayLookupTable : LookupTableBase |
| | 90 | { |
| | 91 | TTGlyphID firstGlyph; |
| | 92 | TTGlyphID glyphCount; |
| | 93 | LookupValue valueArray[ANY_NUMBER]; |
| | 94 | }; |
| | 95 | LE_VAR_ARRAY(TrimmedArrayLookupTable, valueArray) |
| | 96 | |
| | 97 | U_NAMESPACE_END |
| | 98 | #endif |
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