// Copyright (c) 1999-2009 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 __PNGCONVERT_H__

#define __PNGCONVERT_H__

#include <icl/imageplugin.h>

#include "PNGCodec.h"

/** @file

	@internalComponent */

class MPngDecoder 

	{

public:

	virtual void GoToProcessDataState()=0;

	};

// Decoder.

class CPngReadCodec;

class CPngDecoder : public CImageDecoderPlugin, public MPngDecoder

	{

public:

	enum TDecodeState

		{

		EStateStart,

		EStateNormalProcess,

		EStateDataProcess

		};

public:

	CPngDecoder();

 	static CPngDecoder* NewL();

	virtual ~CPngDecoder();

	virtual void ImageType(TInt aFrameNumber, TUid& aImageType, TUid& aImageSubType) const;

	CFrameInfoStrings* FrameInfoStringsL(RFs& aFs, TInt aFrameNumber);

	void GoToProcessDataState();

private:

	// From CImageDecoderPlugin

	void ReadFormatL();

	void ScanDataL();

	void DoConvert();

	void InitConvertL();

	void NotifyComplete();

	TDecodeState iState;

	};

// CPngEncoder

class CPngEncoder : public CImageEncoderPlugin

	{

private:

	enum TEncodeState

		{

		EStateNormalProcess,

		EStateDataProcess

		};

public:

	static CPngEncoder* NewL();

	virtual ~CPngEncoder();

	void GoToProcessDataState();

protected:

	// from CImageEncoderPlugin

	void PrepareEncoderL(const CFrameImageData* aFrameImageData);

	void DoConvert();

	void UpdateHeaderL();

	void InitConvertL();

	void NotifyComplete();

private:

	CPngEncoder();

private:

	TEncodeState iState;

	};

#endif // __PNGCONVERT_H__