/*

 * %W% %E%

 *

 * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved

 *

 */

#ifndef __LOOKUPPROCESSOR_H

#define __LOOKUPPROCESSOR_H

/**

 * \file

 * \internal

 */

#include "LETypes.h"

#include "LEFontInstance.h"

#include "OpenTypeTables.h"

//#include "Lookups.h"

//#include "Features.h"

U_NAMESPACE_BEGIN

class  LEFontInstance;

class  LEGlyphStorage;

class  GlyphIterator;

class  GlyphPositionAdjustments;

struct FeatureTable;

struct FeatureListTable;

struct GlyphDefinitionTableHeader;

struct LookupSubtable;

struct LookupTable;

class LookupProcessor : public UMemory {

public:

    static const LETag notSelected;

    static const LETag defaultFeature;

    le_bool isBogus();

    le_int32 process(LEGlyphStorage &glyphStorage,

        GlyphPositionAdjustments *glyphPositionAdjustments, le_bool rightToLeft,

        const GlyphDefinitionTableHeader *glyphDefinitionTableHeader,

        const LEFontInstance *fontInstance, LEErrorCode& success) const;

    le_uint32 applyLookupTable(const LookupTable *lookupTable, GlyphIterator *glyphIterator,

        const LEFontInstance *fontInstance, LEErrorCode& success) const;

    le_uint32 applySingleLookup(le_uint16 lookupTableIndex, GlyphIterator *glyphIterator,

        const LEFontInstance *fontInstance, LEErrorCode& success) const;

    virtual le_uint32 applySubtable(const LookupSubtable *lookupSubtable, le_uint16 subtableType,

        GlyphIterator *glyphIterator, const LEFontInstance *fontInstance,

        LEErrorCode& success) const = 0;

    virtual ~LookupProcessor();

protected:

    LookupProcessor(const char *baseAddress,

        Offset scriptListOffset, Offset featureListOffset, Offset lookupListOffset,

        LETag scriptTag, LETag languageTag, const LETag *featureOrder);

    LookupProcessor();

    le_int32 selectLookups(const FeatureTable *featureTable, LETag featureTag, le_int32 order);

    const LookupListTable   *lookupListTable;

    const FeatureListTable  *featureListTable;

    LETag                   *lookupSelectArray;

    LETag                   requiredFeatureTag;

    le_uint16               *lookupOrderArray;

    le_uint32               lookupOrderCount;

private:

    LookupProcessor(const LookupProcessor &other); // forbid copying of this class

    LookupProcessor &operator=(const LookupProcessor &other); // forbid copying of this class

};

U_NAMESPACE_END

#endif