--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/fbs/fontandbitmapserver/sfbs/BitmapCompr.h	Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,86 @@
+// 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:
+//
+
+#ifndef __BITMAPCOMPR_H__
+#define __BITMAPCOMPR_H__
+
+//Forward declaration
+class TLineScanningPosition;
+//Global function used by 12, 16, 24 bpp scan line decompression methods
+void AdjustLineScanningPosition(TLineScanningPosition& aLineScanPos, 
+								const TUint32* aBase, 
+								TInt aBitmapWidth, 
+								TInt aStartPos,
+								TInt aCompressedDataBytes);
+
+/**
+Possible values for the template argument of TScanLineDecompressor class.
+@internalComponent
+*/
+typedef enum
+	{
+	E2bpp = 2,
+	E3bpp = 3,
+	E4bpp = 4
+	} TScanLineDecompressorType;
+
+/**
+This functor class is used for bitmap scanline decompression.
+Possible values for the template argument of TScanLineDecompressor class are enumerated
+in TScanLineDecompressorType enum.
+Note: "BPP" means "bytes per pixel for source buffer".
+Note: "BPP_DEST" means "bytes per pixel for destination buffer".
+Note: Template class design was preffered to base-derived class design (with virtual 
+CopyPixel() method), because performance is more important than code size for bitmap
+scanline decompression.
+@internalComponent
+*/
+template <TInt BPP, TInt BPP_DEST> 
+class TScanLineDecompressor
+	{
+public:
+	TScanLineDecompressor(const TUint32* aBase, 
+							TInt aComprDataBytes, 
+							TBool aCanAdjustLineScanPos);
+	void operator()(TUint8* aDestBuffer, const TPoint& aPixel, 
+					TLineScanningPosition& aLineScanPos, TInt aByteWidth, TInt aDestByteWidth, TInt aLength) const;
+
+private:
+	TInt CalcStartPos(const TPoint& aPixel, TInt aByteWidth) const;
+	TInt CalcDestStartPos(const TPoint& aPixel, TInt aByteWidth) const;
+	TInt CalcEndPos(TInt aLength, const TPoint& aPixel, TInt aByteWidth) const;
+	TUint8* CalcDestPtr(const TUint8* aDestBuffer, const TPoint& aPixel) const;
+	TUint8* CalcDestPtrLimit(const TUint8* aDestPtr, const TPoint& aPixel, TInt aByteWidth, 
+								TInt aLength, TInt aStartPos) const;
+	TInt CalcAvailDestSpace(const TUint8* aDestPtr, const TUint8* aDestPtrLimit) const;
+	TUint8* AdjustLineScanningPosition(TLineScanningPosition& aLineScanPos, TInt aByteWidth, 
+										TInt aStartPos) const;
+	TUint8* CopyPixel(TUint8* aDestPtr, const TUint8* aSrcPtr, TInt aCount) const;
+	TUint8* CopyBlockPixel(TUint8* aDestPtr, const TUint8* aSrcPtr, TInt aCount) const;
+
+	TScanLineDecompressor(const TScanLineDecompressor&);//prevent default copy constructor
+	TScanLineDecompressor& operator=(const TScanLineDecompressor&);//prevent default "=" operator
+
+private:
+	const TUint32* iBase;
+	const TInt iComprDataBytes;
+	const TBool iCanAdjustLineScanPos;
+
+	};
+
+#include "BitmapCompr.inl"
+
+#endif//__BITMAPCOMPR_H__
+