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/*
*
* (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
*
*/
#ifndef __LOOKUPTABLES_H
#define __LOOKUPTABLES_H
/**
* \file
* \internal
*/
#include "LETypes.h"
#include "LayoutTables.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 LookupSegment *segments, LEGlyphID glyph) const;
const LookupSingle *lookupSingle(const LookupSingle *entries, LEGlyphID glyph) const;
};
struct SimpleArrayLookupTable : LookupTable
{
LookupValue valueArray[ANY_NUMBER];
};
struct SegmentSingleLookupTable : BinarySearchLookupTable
{
LookupSegment segments[ANY_NUMBER];
};
struct SegmentArrayLookupTable : BinarySearchLookupTable
{
LookupSegment segments[ANY_NUMBER];
};
struct SingleTableLookupTable : BinarySearchLookupTable
{
LookupSingle entries[ANY_NUMBER];
};
struct TrimmedArrayLookupTable : LookupTable
{
TTGlyphID firstGlyph;
TTGlyphID glyphCount;
LookupValue valueArray[ANY_NUMBER];
};
U_NAMESPACE_END
#endif
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