1 // Copyright (c) 1999-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #ifndef __PPM2CONVERT_H__

    17 #define __PPM2CONVERT_H__

    18 

    19 #include <icl/imageplugin.h>

    20 #include "PPM2Codec.h"

    21 

    22 // Decoder.

    23 class CPpmReadCodec;

    24 class CPpmDecoder : public CImageDecoderPlugin

    25 	{

    26 friend class CPpmReadCodec;

    27 

    28 public:

    29 	static CPpmDecoder* NewL();

    30 	virtual ~CPpmDecoder();

    31 

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

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

    34 

    35 private:

    36 	CPpmDecoder();

    37 

    38 	void InternalizeHeaderL();

    39 

    40 	TBool Compressed() const;

    41 	void SetCompressed(TBool aCompressed);

    42 	TBool BytesValid() const;

    43 	void SetBytesValid(TBool aBytesValid);

    44 	TInt DataShift() const;

    45 

    46 	void SkipCommentAndWhiteSpaceL();

    47 

    48 	TUint PeekByteL();

    49 	void IncByte();

    50 	TUint GetByteL();

    51 	TInt ReadIntL();

    52 	void ResetPosition(TInt aPosition);

    53 

    54 	// From CImageDecoderPlugin

    55 	void ScanDataL();

    56 	// Called by ScanDataL.

    57 	// Opens file, scans header and validates format.

    58 	void ReadFormatL();

    59 	void DoConvert();

    60 

    61 private:

    62 	TInt iDataShift;

    63 	TInt iMaxValue;

    64 	TUint iFlags;

    65 	TPtrC8 iSourceBuffer;

    66 	TInt iBase;

    67 	enum TFlags

    68 		{

    69 		EFlagCompressed=0x01,

    70 		EFlagBytesValid=0x02

    71 		};

    72 	};

    73 

    74 // CPpmEncoder

    75 class CPpmEncoder : public CImageEncoderPlugin

    76 	{

    77 friend class CPpm2WriteCodec;	

    78 	

    79 public:

    80 	static CPpmEncoder* NewL();

    81 	virtual ~CPpmEncoder();

    82 	

    83 protected:

    84 	void AppendDataL(const TDesC8& aData);

    85 	// from CImageEncoderPlugin

    86 	void PrepareEncoderL(const CFrameImageData* aFrameImageData);

    87 	void UpdateHeaderL();

    88 	void DoConvert();

    89 	

    90 private:

    91 	CPpmEncoder();

    92 	void DoConvertL();

    93 

    94 	};

    95 

    96 #include "Ppm2Convert.inl"

    97 

    98 #endif // __PPM2CONVERT_H__

    99