/*

 *******************************************************************************

 *

 *   Copyright (C) 1999-2003, International Business Machines

 *   Corporation and others.  All Rights Reserved.

 *

 *******************************************************************************

 *   file name:  PortableFontInstance.h

 *

 *   created on: 11/12/1999

 *   created by: Eric R. Mader

 */

#ifndef __PORTABLEFONTINSTANCE_H

#define __PORTABLEFONTINSTANCE_H

#include <stdio.h>

#include "layout/LETypes.h"

#include "layout/LEFontInstance.h"

#include "FontTableCache.h"

#include "sfnt.h"

#include "cmaps.h"

class PortableFontInstance : public LEFontInstance, protected FontTableCache

{

private:

    FILE *fFile;

    float    fPointSize;

    le_int32 fUnitsPerEM;

    le_int32 fAscent;

    le_int32 fDescent;

    le_int32 fLeading;

    const SFNTDirectory *fDirectory;

    le_uint16 fDirPower;

    le_uint16 fDirExtra;

    float fDeviceScaleX;

    float fDeviceScaleY;

    CMAPMapper *fCMAPMapper;

    const HMTXTable *fHMTXTable;

    le_uint16 fNumGlyphs;

    le_uint16 fNumLongHorMetrics;

    static le_int8 highBit(le_int32 value);

    const DirectoryEntry *findTable(LETag tag) const;

    const void *readTable(LETag tag, le_uint32 *length) const;

    void deleteTable(const void *table) const;

    void getMetrics();

    CMAPMapper *findUnicodeMapper();

protected:

    const void *readFontTable(LETag tableTag) const;

public:

    PortableFontInstance(char *fileName, float pointSize, LEErrorCode &status);

    virtual ~PortableFontInstance();

    virtual const void *getFontTable(LETag tableTag) const;

    virtual le_int32 getUnitsPerEM() const

    {

        return fUnitsPerEM;

    };

    virtual le_int32 getAscent() const

    {

        return fAscent;

    }

    virtual le_int32 getDescent() const

    {

        return fDescent;

    }

    virtual le_int32 getLeading() const

    {

        return fLeading;

    }

    virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const

    {

        return fCMAPMapper->unicodeToGlyph(ch);

    }

    virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;

    virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;

    float getXPixelsPerEm() const

    {

        return fPointSize;

    };

    float getYPixelsPerEm() const

    {

        return fPointSize;

    };

    float getScaleFactorX() const

    {

        return 1.0;

    }

    float getScaleFactorY() const

    {

        return 1.0;

    }

};

#endif