/*

 *

 * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved

 *

 */

#ifndef __MORPHTABLES_H

#define __MORPHTABLES_H

/**

 * \file

 * \internal

 */

#include "LETypes.h"

#include "LayoutTables.h"

U_NAMESPACE_BEGIN

class LEGlyphStorage;

typedef le_uint32 FeatureFlags;

typedef le_int16 FeatureType;

typedef le_int16 FeatureSetting;

struct FeatureTableEntry

{

    FeatureType     featureType;

    FeatureSetting  featureSetting;

    FeatureFlags    enableFlags;

    FeatureFlags    disableFlags;

};

struct ChainHeader

{

    FeatureFlags        defaultFlags;

    le_uint32           chainLength;

    le_int16           nFeatureEntries;

    le_int16           nSubtables;

    FeatureTableEntry   featureTable[ANY_NUMBER];

};

struct MorphTableHeader

{

    le_int32    version;

    le_uint32   nChains;

    ChainHeader chains[ANY_NUMBER];

    void process(LEGlyphStorage &glyphStorage) const;

};

typedef le_int16 SubtableCoverage;

enum SubtableCoverageFlags

{

    scfVertical = 0x8000,

    scfReverse  = 0x4000,

    scfIgnoreVt = 0x2000,

    scfReserved = 0x1FF8,

    scfTypeMask = 0x0007

};

enum MorphSubtableType

{

    mstIndicRearrangement               = 0,

    mstContextualGlyphSubstitution      = 1,

    mstLigatureSubstitution             = 2,

    mstReservedUnused                   = 3,

    mstNonContextualGlyphSubstitution   = 4,

    mstContextualGlyphInsertion         = 5

};

struct MorphSubtableHeader

{

    le_int16           length;

    SubtableCoverage    coverage;

    FeatureFlags        subtableFeatures;

    void process(LEGlyphStorage &glyphStorage) const;

};

U_NAMESPACE_END

#endif