sl@0: /*
sl@0: * Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: * SymbianFontInstance.CPP
sl@0: * Symbian implementation of LEFontInstance
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: #ifndef SYMBIANFontInstance_H_
sl@0: #define SYMBIANFontInstance_H_
sl@0: 
sl@0: #include <stdio.h>
sl@0: 
sl@0: #include "layout/LETypes.h"
sl@0: #include "layout/LEFontInstance.h"
sl@0: 
sl@0: #include "FontTableCache.h"
sl@0: 
sl@0: #include "sfnt.h"
sl@0: #include "cmaps.h"
sl@0: 
sl@0: // Symbian includes
sl@0: #include <gdi.h>
sl@0: 
sl@0: class MOpenFontExtensionInterface;
sl@0: 
sl@0: class SymbianFontInstance : public LEFontInstance, protected FontTableCache
sl@0: 	{
sl@0: public:
sl@0: 	SymbianFontInstance(CBitmapFont* aBitmapFont, LEErrorCode &status, le_bool aKeepGlyphOfZWJ = false);
sl@0: 	virtual ~SymbianFontInstance();
sl@0: 	void SetSessionHandle(TInt aHandle) 
sl@0: 		{
sl@0: 		iSessionHandle = aHandle;
sl@0: 		}
sl@0: 
sl@0: 	const void *getFontTable(LETag tableTag) const;
sl@0: 
sl@0: 	le_int32 getUnitsPerEM() const
sl@0: 		{
sl@0: 		return fUnitsPerEM;
sl@0: 		}
sl@0: 
sl@0: 	le_int32 getAscent() const
sl@0: 		{
sl@0: 		return fAscent;
sl@0: 		}
sl@0: 
sl@0: 	le_int32 getDescent() const
sl@0: 		{
sl@0: 		return fDescent;
sl@0: 		}
sl@0: 
sl@0: 	le_int32 getLeading() const
sl@0: 		{
sl@0: 		return fLeading;
sl@0: 		}
sl@0: 
sl@0: 	LEGlyphID mapCharToGlyph(LEUnicode32 ch) const
sl@0: 		{
sl@0: 		// 1922 mlyl -->
sl@0: 		if (ch == 0x200D && !iKeepGlyphOfZWJ)
sl@0: 			return 1;
sl@0: 		else
sl@0: 		// <-- 1922 mlyl
sl@0: 			return fCMAPMapper->unicodeToGlyph(ch);
sl@0: 		}
sl@0: 
sl@0: 	void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;
sl@0: 
sl@0: 	le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;
sl@0: 
sl@0: 	void transformFunits(float xFunits, float yFunits, LEPoint &pixels) const;
sl@0: 	float xUnitsToPoints(float xUnits) const;
sl@0: 	float yUnitsToPoints(float yUnits) const;
sl@0: 	float getXPixelsPerEm() const;
sl@0: 	float getYPixelsPerEm() const;
sl@0: 	float getScaleFactorX() const;
sl@0: 	float getScaleFactorY() const;
sl@0: 
sl@0: protected:
sl@0: 	const void *readFontTable(LETag tableTag) const;
sl@0: 
sl@0: private:
sl@0: 	FILE *fFile;	
sl@0: 
sl@0: 	le_int32 fUnitsPerEM;
sl@0: 	le_int32 fAscent;
sl@0: 	le_int32 fDescent;
sl@0: 	le_int32 fLeading;
sl@0: 
sl@0: 	const SFNTDirectory *fDirectory;
sl@0: 	le_uint16 fDirPower;
sl@0: 	le_uint16 fDirExtra;
sl@0: 
sl@0: 	float fXPixelsPerEm;
sl@0: 	float fYPixelsPerEm;
sl@0: 
sl@0: 	float fDeviceScaleX;
sl@0: 	float fDeviceScaleY;
sl@0: 
sl@0: 	CMAPMapper *fCMAPMapper;
sl@0: 
sl@0: 	const HMTXTable *fHMTXTable;
sl@0: 	le_uint16 fNumGlyphs;
sl@0: 	le_uint16 fNumLongHorMetrics;
sl@0: 
sl@0: 	CBitmapFont* iFont;
sl@0: 	MOpenFontShapingExtension* iExtensionInterface;
sl@0: 	MOpenFontTrueTypeExtension* iTrueTypeExtensionInterface;
sl@0: 	TInt iSessionHandle;
sl@0: 	
sl@0: 	// --> 1922 mlyl: The script which this shaper will shape
sl@0: 	le_bool iKeepGlyphOfZWJ;
sl@0: 	// <-- 1922 mlyl
sl@0: 
sl@0: 	static le_int8 highBit(le_int32 value);
sl@0: 
sl@0: 	const DirectoryEntry *findTable(LETag tag) const;
sl@0: 	const void *readTable(LETag tag, le_uint32 *length) const;
sl@0: 	void deleteTable(const void *table) const;
sl@0: 	void getMetrics();
sl@0: 
sl@0: 	CMAPMapper *findUnicodeMapper();
sl@0: 	};
sl@0: 
sl@0: #endif