/*

* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

* SymbianFontInstance.CPP

* Symbian implementation of LEFontInstance

*

*/

#ifndef SYMBIANFontInstance_H_

#define SYMBIANFontInstance_H_

#include <stdio.h>

#include "layout/LETypes.h"

#include "layout/LEFontInstance.h"

#include "FontTableCache.h"

#include "sfnt.h"

#include "cmaps.h"

// Symbian includes

#include <gdi.h>

class MOpenFontExtensionInterface;

class SymbianFontInstance : public LEFontInstance, protected FontTableCache

	{

public:

	SymbianFontInstance(CBitmapFont* aBitmapFont, LEErrorCode &status, le_bool aKeepGlyphOfZWJ = false);

	virtual ~SymbianFontInstance();

	void SetSessionHandle(TInt aHandle) 

		{

		iSessionHandle = aHandle;

		}

	const void *getFontTable(LETag tableTag) const;

	le_int32 getUnitsPerEM() const

		{

		return fUnitsPerEM;

		}

	le_int32 getAscent() const

		{

		return fAscent;

		}

	le_int32 getDescent() const

		{

		return fDescent;

		}

	le_int32 getLeading() const

		{

		return fLeading;

		}

	LEGlyphID mapCharToGlyph(LEUnicode32 ch) const

		{

		// 1922 mlyl -->

		if (ch == 0x200D && !iKeepGlyphOfZWJ)

			return 1;

		else

		// <-- 1922 mlyl

			return fCMAPMapper->unicodeToGlyph(ch);

		}

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

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

	void transformFunits(float xFunits, float yFunits, LEPoint &pixels) const;

	float xUnitsToPoints(float xUnits) const;

	float yUnitsToPoints(float yUnits) const;

	float getXPixelsPerEm() const;

	float getYPixelsPerEm() const;

	float getScaleFactorX() const;

	float getScaleFactorY() const;

protected:

	const void *readFontTable(LETag tableTag) const;

private:

	FILE *fFile;	

	le_int32 fUnitsPerEM;

	le_int32 fAscent;

	le_int32 fDescent;

	le_int32 fLeading;

	const SFNTDirectory *fDirectory;

	le_uint16 fDirPower;

	le_uint16 fDirExtra;

	float fXPixelsPerEm;

	float fYPixelsPerEm;

	float fDeviceScaleX;

	float fDeviceScaleY;

	CMAPMapper *fCMAPMapper;

	const HMTXTable *fHMTXTable;

	le_uint16 fNumGlyphs;

	le_uint16 fNumLongHorMetrics;

	CBitmapFont* iFont;

	MOpenFontShapingExtension* iExtensionInterface;

	MOpenFontTrueTypeExtension* iTrueTypeExtensionInterface;

	TInt iSessionHandle;

	// --> 1922 mlyl: The script which this shaper will shape

	le_bool iKeepGlyphOfZWJ;

	// <-- 1922 mlyl

	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();

	};

#endif