--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmplugins/imagingplugins/codecs/TIFFCodec/TIFFFax.h	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,157 @@
+// 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 __TIFFFAX_H__
+#define __TIFFFAX_H__
+
+#include "TIFFCodec.h"
+
+// Base class for 1d Tiff fax decoders
+enum TTiffFaxCodeType
+{
+	ETiffFaxBlackRun,
+	ETiffFaxWhiteRun,
+	ETiffFaxEndOfLineCode
+};
+
+enum TTiffFaxState
+	{
+	ETiffFaxUnderflow,
+	ETiffFaxPixelRun,
+	ETiffFaxEndOfLine,
+	ETiffFaxEndOfFax,
+	ETiffFaxInvalid
+	};
+
+class CTiffFax1dDecoder : public CTiffReadSubCodec
+	{
+protected:
+	virtual ~CTiffFax1dDecoder();
+	
+	// From CTiffImageDecoder
+	virtual void	DoNewFrameL(CFbsBitmap& aBitmap, TBool aDisableErrorDiffusion, TInt aReductionFactor);
+	virtual void	NewStripL(TInt aNumBytes);
+	virtual TBool	ProcessStripL(TBufPtr8* aSrc);
+
+	// New
+	void					ConstructL(const TTiffImageData& aImageData);
+	virtual TTiffFaxState	ProcessNextCode() = 0;
+	virtual void			NewRow();
+	void					UseBits(TInt aNumBits);
+	TTiffFaxState			Decode1d();
+	TTiffFaxState			DecodeBlack();
+	TTiffFaxState			DecodeWhite();
+	TTiffFaxState			DecodeEndOfLine();
+protected:
+	// Info
+	const TTiffImageData*	iImageData;
+
+	// Input
+	const TUint8*				iSourcePtr;
+	const TUint8*				iSourcePtrLimit;
+	TBool				iReverseBitsInByte;
+	TInt32				iBitCache;
+	TInt				iBitCacheLength;
+	
+	// Decoding
+	TTiffFaxCodeType	iColor;
+	TTiffFaxCodeType	iCodeType;
+	TInt				iCodeCount;
+	
+	// Buffer
+	TInt*				iRunData;
+	TInt				iRunDataIndex;
+	TInt				iRowWidth;
+	TInt				iPixelsStoredInRow;
+	
+	// Output
+	TInt				iRowNumber;
+	TInt				iRowsRemaining;
+	CImageProcessor* iImageProcessor;
+	TRgb				iBlack;
+	TRgb				iWhite;
+	};
+
+// Base class for 2d Tiff fax decoders
+class CTiffFax2dDecoder : public CTiffFax1dDecoder
+	{
+protected:
+	virtual ~CTiffFax2dDecoder();
+	
+	// From CTiffFax1dDecoder 
+	virtual void			NewStripL(TInt aNumBytes);
+	virtual void			NewRow();
+
+	// New
+	void					ConstructL(const TTiffImageData& aImageData);
+	TTiffFaxState			Decode2d();
+	TTiffFaxState			DecodeHorizontal();
+	TTiffFaxState			DecodeVertical(TInt aDifference);
+	TTiffFaxState			DecodePass();
+
+protected:
+	TInt*					iReferenceRunData;
+	TInt					iReferenceRunDataIndex;
+	TInt					iHorizontalCodeCount;
+	TInt					iA0;
+	};
+
+// Group 3 fax, 1 dimentional decoder
+class CTiffGroup3Fax1dDecoder : public CTiffFax1dDecoder
+	{
+public:
+	static CTiffGroup3Fax1dDecoder* NewL(const TTiffImageData& aImageData);
+
+protected:
+	// From CTiffFax1dDecoder
+	virtual TTiffFaxState	ProcessNextCode();
+	};
+
+// Group 3 fax, 2 dimentional decoder
+class CTiffGroup3Fax2dDecoder : public CTiffFax2dDecoder
+	{
+public:
+	static CTiffGroup3Fax2dDecoder* NewL(const TTiffImageData& aImageInfo);
+
+	// From CTiffFax2dDecoder
+	virtual void			NewStripL(TInt aNumBytes);
+	virtual void			NewRow();
+
+protected:
+	virtual TTiffFaxState	ProcessNextCode();
+
+private:
+	enum TState
+		{
+		E1d,
+		E2d,
+		ESelect1d2d,
+		};
+	TState	iState;
+	};
+
+// Group 4 fax decoder
+class CTiffGroup4FaxDecoder : public CTiffFax2dDecoder
+	{
+public:
+	static CTiffGroup4FaxDecoder* NewL(const TTiffImageData& aImageData);
+
+protected:
+	// From CTiffFax1dDecoder
+	virtual TTiffFaxState	ProcessNextCode();
+	};
+
+#endif
+