// 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