84 lines
1.5 KiB
C
84 lines
1.5 KiB
C
/*
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* @(#)LookupTables.h 1.5 00/03/15
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*
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* (C) Copyright IBM Corp. 1998, 1999, 2000 - All Rights Reserved
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*
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*/
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#ifndef __LOOKUPTABLES_H
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#define __LOOKUPTABLES_H
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#include "LETypes.h"
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#include "LayoutTables.h"
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enum LookupTableFormat
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{
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ltfSimpleArray = 0,
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ltfSegmentSingle = 2,
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ltfSegmentArray = 4,
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ltfSingleTable = 6,
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ltfTrimmedArray = 8
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};
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typedef le_int16 LookupValue;
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struct LookupTable
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{
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le_int16 format;
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};
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struct LookupSegment
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{
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le_int16 lastGlyph;
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le_int16 firstGlyph;
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LookupValue value;
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};
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struct LookupSingle
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{
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le_int16 glyph;
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LookupValue value;
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};
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struct BinarySearchLookupTable : LookupTable
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{
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le_int16 unitSize;
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le_int16 nUnits;
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le_int16 searchRange;
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le_int16 entrySelector;
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le_int16 rangeShift;
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const LookupSegment *lookupSegment(const LookupSegment *segments, le_uint32 glyph) const;
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const LookupSingle *lookupSingle(const LookupSingle *entries, le_uint32 glyph) const;
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};
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struct SimpleArrayLookupTable : LookupTable
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{
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LookupValue valueArray[ANY_NUMBER];
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};
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struct SegmentSingleLookupTable : BinarySearchLookupTable
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{
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LookupSegment segments[ANY_NUMBER];
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};
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struct SegmentArrayLookupTable : BinarySearchLookupTable
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{
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LookupSegment segments[ANY_NUMBER];
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};
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struct SingleTableLookupTable : BinarySearchLookupTable
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{
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LookupSingle entries[ANY_NUMBER];
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};
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struct TrimmedArrayLookupTable : LookupTable
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{
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le_int16 firstGlyph;
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le_int16 glyphCount;
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LookupValue valueArray[ANY_NUMBER];
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};
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#endif
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