// 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 __PPM2CONVERT_H__

#define __PPM2CONVERT_H__

#include <icl/imageplugin.h>

#include "PPM2Codec.h"

// Decoder.

class CPpmReadCodec;

class CPpmDecoder : public CImageDecoderPlugin

	{

friend class CPpmReadCodec;

public:

	static CPpmDecoder* NewL();

	virtual ~CPpmDecoder();

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

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

private:

	CPpmDecoder();

	void InternalizeHeaderL();

	TBool Compressed() const;

	void SetCompressed(TBool aCompressed);

	TBool BytesValid() const;

	void SetBytesValid(TBool aBytesValid);

	TInt DataShift() const;

	void SkipCommentAndWhiteSpaceL();

	TUint PeekByteL();

	void IncByte();

	TUint GetByteL();

	TInt ReadIntL();

	void ResetPosition(TInt aPosition);

	// From CImageDecoderPlugin

	void ScanDataL();

	// Called by ScanDataL.

	// Opens file, scans header and validates format.

	void ReadFormatL();

	void DoConvert();

private:

	TInt iDataShift;

	TInt iMaxValue;

	TUint iFlags;

	TPtrC8 iSourceBuffer;

	TInt iBase;

	enum TFlags

		{

		EFlagCompressed=0x01,

		EFlagBytesValid=0x02

		};

	};

// CPpmEncoder

class CPpmEncoder : public CImageEncoderPlugin

	{

friend class CPpm2WriteCodec;	

public:

	static CPpmEncoder* NewL();

	virtual ~CPpmEncoder();

protected:

	void AppendDataL(const TDesC8& aData);

	// from CImageEncoderPlugin

	void PrepareEncoderL(const CFrameImageData* aFrameImageData);

	void UpdateHeaderL();

	void DoConvert();

private:

	CPpmEncoder();

	void DoConvertL();

	};

#include "Ppm2Convert.inl"

#endif // __PPM2CONVERT_H__