--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmplugins/imagingplugins/codecs/JPEGCodec/rgbbufferptr.h	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,106 @@
+// Copyright (c) 2006-2009 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 RGBBUFFERPTR_H
+#define RGBBUFFERPTR_H
+
+#include <e32base.h>
+
+/**
+   @file
+   @internalComponent
+*/
+
+class CFbsBitmap;
+
+/**
+	Basic support for RGB input buffer, which can lock data in-place
+	or copy it to the internal buffer depending on the bitmap display mode
+	and block size/position
+*/
+class CRgbBufferPtr : public CBase
+	{
+private:	
+	typedef TUint8* TRgbBufferPtr;
+
+	enum 
+		{
+		KRgbBufferPixelSize = 3,
+		};
+		
+	/**
+	colour component indeces when accessing EColor16M mode bitmap
+	*/
+	enum 
+	    {
+	    KBlueCompIdx    = 0,
+	    KGreenCompIdx   = 1,
+	    KRedCompIdx     = 2
+	    };
+public:
+    typedef const TUint8* TConstRgbBufferPtr;
+	
+	static CRgbBufferPtr* NewL(CFbsBitmap& aBitmap, const TSize& aMCUSizeinPixels);
+	
+	~CRgbBufferPtr();
+	
+	TConstRgbBufferPtr LockBuffer(const TPoint& aTopLeft);
+	void UnlockBuffer();
+	
+	// must be used only within a line, can't span lines
+	static inline TConstRgbBufferPtr ShiftPtr(TConstRgbBufferPtr aPtr, TInt aOffset);
+
+	inline TInt NextLineOffset() const;
+	inline TInt PtrShiftValueMCU16(TUint aNumberOfPixels) const;
+	inline TInt PtrShiftValueMCU8(TUint aNumberOfPixels) const;
+		
+	static inline TUint8 Red(TConstRgbBufferPtr aPtr);
+	static inline TUint8 Green(TConstRgbBufferPtr aPtr);
+	static inline TUint8 Blue(TConstRgbBufferPtr aPtr);
+	
+protected:
+    static inline TRgbBufferPtr ShiftPtr(TRgbBufferPtr aPtr, TInt aOffset);
+    static inline TRgbBufferPtr Coord2Ptr(TRgbBufferPtr aBase, TInt aX, TInt aY);
+    static inline TInt Coord2Size(TInt aX, TInt aY);
+    
+private:
+    CRgbBufferPtr(CFbsBitmap& aBitmap, const TSize& aMCUSizeinPixels);
+    void ConstructL();
+    
+private:
+	TConstRgbBufferPtr      iLockedPtr;
+	TRgbBufferPtr           iRgbBuffer;
+	TRgbBufferPtr           iOriginalRgbBuffer;
+	TBool					iBitmapDirectAccess;
+	TInt					iBitmapScanlineLength;
+	
+	const TSize             iBitmapSize;
+	const TSize             iMCUSizeinPixels;
+
+	TInt                    iNextLineOffset;
+	TInt                    iBufferScanlineLength;
+    TSize                   iBufferSizeInPixels;
+    TPoint                  iBufferPos;
+
+	CFbsBitmap*             iBitmap;
+	TUint32*				iBitmapData;
+	
+	};	
+
+#include "rgbbufferptr.inl"
+
+#endif // ndef RGBBUFFERPTR_H
+
+