// Copyright (c) 2006-2009 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:

 // CWsGc and associated classes definitions

 // 

 //

 #ifndef __GC_H__

 #define __GC_H__

 #include "wnredraw.h"

 #include "cliwin.h"

 #include "graphicscontextstate.h"

 class CWsFbsFont;

 class CWsGc : public CWsObject

 	{

 	enum {ETextPtrBufLen=0x100};	// Buffer of TText, used on stack

 // Functions

 public:

 	static CWsGc* NewL(CWsClient *aOwner);

 	~CWsGc();

 	static void InitStaticsL();

 	static void DeleteStatics();

 	void CommandL(TInt aOpcode, const TAny *aCmdData);

 	void Deactivate();

 	inline void SetNextWinGc(CWsGc *aGc);

 	inline CWsGc *NextWinGc() const;

 	TInt ExternalizeL(CBufBase& aBuffer, TInt aStartPos);

 	TInt ExternalizeClippingRegionL(RWriteStream& aWriteStreem);

 	TInt FbsBitmapHandle(TInt aOpcode, const TWsGcCmdUnion &pData, TInt& aMaskHandle);

 	TInt WsBitmapHandle(TInt aOpcode, const TWsGcCmdUnion &pData, TInt& aMaskHandle);

 	TInt WsDrawableSourceHandle(TInt aOpcode, const TWsGcCmdUnion &aData);

 	void Reactivate();

 private:

 	CWsGc(CWsClient *aOwner);

 	void ConstructL();

 	void Activate(CWsClientWindow *win);

 	void DoDrawing2(TWsGcOpcodes aOpcode, const TWsGcCmdUnion &pData);

 	void SetGcAttribute(TInt aOpcode, TWsGcCmdUnion pData);

 	void SetOrigin(const TPoint &aOrigin);

 	void DoDrawing0L(TWsGcOpcodes aOpcode, const TWsGcCmdUnion &pData);

 	void DoDrawing1(TWsGcOpcodes aOpcode, const TWsGcCmdUnion &pData);

 	void Activate(const TInt &aHandle);

 	void DoDrawCommand(TWsGcOpcodes aOpcode, const TWsGcCmdUnion &pData);

 	void SetClippingRegionL(TInt aCountRegion);

 	void SetClippingRect(const TRect &aRect);

 	void CancelClippingRegion();

 	void DoDrawPolygon(const TWsGcCmdDrawPolygon *aDrawPolygon);

 	void DoDrawPolyLine(const TWsGcCmdDrawPolyLine *aDrawPolyLine, TBool aContinued);

 	void GcOwnerPanic(TClientPanic aPanic);

 	void ResetClippingRect();

 	void EndSegmentedPolygon();

 	void StartSegmentedDrawPolygonL(const TWsGcCmdStartSegmentedDrawPolygon* aDrawPolygon);

 	void SegmentedDrawPolygonData(const TWsGcCmdSegmentedDrawPolygonData* aDrawPolygon);

 	void UpdateJustification(TText* aText,TInt aLen);

 	void UpdateJustification(TText* aText,TInt aLen,CGraphicsContext::TTextParameters* aParam);

 #if defined(_DEBUG)

 	inline TBool IsPolyPointData() {return(iPolyPointListSize>0 || iPolyPoints!=NULL);}

 #endif

 	void ExternalizeAlphaValueL(RWriteStream& aWriteStream);

 	TPtrC BufferTPtr(TText* aStart,TInt aLen);

 	void CheckPolyData(const TAny* aDataPtr, TInt aHeaderSize, TInt aNumPoints);

 // Data

 private:

 	CFbsBitGc *iBackedUpWinGc;

 	CWsClientWindow *iWin;

 	CWsGc *iNextWinGc;

 	CWsFbsFont *iFont;

 	RWsRegion* iUserDefinedClippingRegion; //Clipping region that is set explicitly by the user.

 	TRect iClippingRect;	// All drawing clipped to this rectangle in addition to other clipping

 	TBool iClippingRectSet;	// ETrue if the iClippingRect is in use

 	TPoint iOrigin;			// User defined origin, relative to the top left of the window

 	TPoint iLinePos;		// Current line position for LineBy, LineTo etc

 	TPoint *iPolyPoints;

 	TInt iPolyPointListSize;

 	//member used for storing graphics context data for Internalize/Externalize

 	TInternalGcStatus iInternalStatus;

 	// static variables

 	static CFbsBitmap *iScratchBitmap;

 	static CFbsBitmap *iScratchMaskBitmap;

 	};

 inline void CWsGc::SetNextWinGc(CWsGc *aGc)

 	{

 	iNextWinGc=aGc;

 	}

 inline CWsGc *CWsGc::NextWinGc() const

 	{

 	return(iNextWinGc);

 	}

 #endif