// Copyright (c) 2003-2009 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:

// This is the implementation of the GifScaler Library

// 

//

#ifndef __GIFSCALERBODY_H__

#define __GIFSCALERBODY_H__

#include <e32base.h>

#include <fbs.h>

#include <bitmaptransforms.h>

#include "gifscaler.h" // Required for enums.

// Color quantizer class.

class CColorQuantizer;

/**

*

* The private API for clients to call the GifScaler Library scaling and color quantization.

* @internalTechnology

*

*/

/**

*

* Body of CGifScaler

*

* @internalTechnology

*

*/

NONSHARABLE_CLASS( CGifScaler::CBody ): public CActive

	{

	friend class CGifScaler;

public:

	// Current state.

	enum TScaleState

		{

		EInactiveState,					// Scaling is inactive.

		EScalingState,					// Scaling the image only.

		EStartColorQuantization,		// Starting the color quantization.

		ECleanUpPending,				// Scaling etc. complete, so start cleanup.

		ECleanUpState,					// Cleaning up.

		EScalingComplete				// All operations complete.

		};

private:

	static CBody* NewL(CFbsBitmap& aSource, CFbsBitmap* aSourceMask, CGifScaler::TOptions aOptions);

	~CBody();

	void Scale(TRequestStatus* aStatus, CFbsBitmap& aDestination, CPalette& aPalette, TBool aMaintainAspectRatio);

	void Scale(TRequestStatus* aStatus, CFbsBitmap& aDestination, CPalette& aPalette, TUint8 aTransparencyThreshold, TBool aMaintainAspectRatio);

	// From CActive

	void RunL();

	TInt RunError(TInt aError);

	void DoCancel();

	// New fns.

	CBody(CFbsBitmap& aSource, CFbsBitmap* aSourceMask, CGifScaler::TOptions aOptions);

	void ConstructL();

	// Cleanup fn.

	// Used after scaling is complete.

	void CleanUp();

	// Complete scaling.

	void RequestComplete(TInt aReason);

	// Complete current state.

	void SelfComplete(TInt aReason);

private:

	// Source bitmap. (not owned)

	CFbsBitmap& iSource;

	// Source bitmap mask. (not owned)

	CFbsBitmap* iSourceMask;

	// Intermediate bitmap. (owned)

	CFbsBitmap* iIntermediate;

	// Destination bitmap. (not owned)

	CFbsBitmap* iDestination;

	// Destination mask bitmap. (owned)

	CFbsBitmap* iDestinationMask;

	// Scaling and color quantization options.

	CGifScaler::TOptions iOptions;

	// MaintainAspectRatio.

	TBool iMaintainAspectRatio;

	// Bitmap scaler. (owned)

	CBitmapScaler* iBitmapScaler;

	// Request status to signal when done. (not owned)

	TRequestStatus* iRequestStatus;

	// Current state.

	TScaleState iCurrentState;

	// Tranparency indices.

	TUint8 iTransparencyIndex;

	TUint8 iReplacementIndex;

	TUint8 iTransparencyThreshold;

	// Color quantizer. (owned)

	CColorQuantizer* iColorQuantizer;

	// Output palette. (not owned)

	CPalette *iPalette;

	};

#endif  // __GIFSCALERBODY_H__