// 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:

//

#ifndef IMAGEPOSTPROCESS_H

#define IMAGEPOSTPROCESS_H

/** 	@file

	@internalComponent */

class CBitmapScaler;

class CBitmapRotator;

class CFbsBitmap;

class MPostProcessObserver

	{

public:

	virtual void OnTransformDone(TInt aError)=0;

	};

class CTransformerSharedData: public CBase

	{

public:

	static CTransformerSharedData* NewL();

	void AddRef();

	void Release();

	void Cleanup();

	CBitmapScaler&	ScalerL();

	CBitmapRotator&	RotatorL();

	inline void SetTransformOptions(TUint aOptions);

	inline void SetClipRect(const TRect& aClipRect);

	inline void SetTrueSrcSize(const TSize& aSize);

	inline const TSize& TrueSrcSize() const;

	inline TUint TransformOptions() const;

	inline TBool ClippingSet() const;

	inline const TRect& ClipRect() const;

protected:

	~CTransformerSharedData();

protected:

	CBitmapRotator*		iRotator;

	CBitmapScaler*		iScaler;

	TUint				iTransformOptions;

	TRect				iClipRect;

	TBool				iClippingSet;

	TSize				iTrueSrcSize;

private:

	TInt				iRefCount;

	};

class CAsyncTransformer:public CActive 

	{

public:

	static CAsyncTransformer* NewL(MPostProcessObserver& aObserver, CTransformerSharedData& aSingleton, const TSize& aDestSize);

	~CAsyncTransformer();

	void Transform(CFbsBitmap* aImage, TBool aMantainAspect);

	void Restart();

	void Cleanup();

	inline void GetBitmap(CFbsBitmap*& aImage) const;

	TInt SetScaleQuality(TInt aQualityValue);

	inline CTransformerSharedData& Singleton();

protected:

	CAsyncTransformer(MPostProcessObserver& aObserver,CTransformerSharedData& aSingleton, const TSize& aDestSize);

	void CreateDestBitmapsL();

	TInt RunError(TInt aError);

	void RunL();

	void DoCancel();

	TInt NextTransform(TUint& aTransFormTodo1);

	void RunAgain();

	void DeletePreTranformBmps();

	void DoClipL(CFbsBitmap* aSrc, CFbsBitmap*& aDest);

protected:

	MPostProcessObserver& iObserver;

	CTransformerSharedData*	iSingleton; // ref. counted

	const TSize		iDestSize;

	CFbsBitmap*		iImgSource;			// not owned

	CFbsBitmap*		iCurrentSource;		// not owned

	CFbsBitmap*		iScaleDest;

	CFbsBitmap*		iClippingDest;

	CFbsBitmap*		iTransformDest;

	TBool			iKeepAspect;

	TUint			iTransformTodo;

	TInt			iScaleQuality;

	TInt			iResultStatus;

	TRect			iTrueClipRect;

	TBool			iScaleNeeded;

	enum TState 

		{

		EStart,

		EClip,

		ETransform,

		ETransformDone,

		EScale,

		EDone

		}			iState;

	};

#include "ImagePostprocess.inl"

#endif // ndef IMAGEPOSTPROCESS_H