1 // Copyright (c) 2006-2009 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 RGBBUFFERPTR_H

    17 #define RGBBUFFERPTR_H

    18 

    19 #include <e32base.h>

    20 

    21 /**

    22    @file

    23    @internalComponent

    24 */

    25 

    26 class CFbsBitmap;

    27 

    28 /**

    29 	Basic support for RGB input buffer, which can lock data in-place

    30 	or copy it to the internal buffer depending on the bitmap display mode

    31 	and block size/position

    32 */

    33 class CRgbBufferPtr : public CBase

    34 	{

    35 private:	

    36 	typedef TUint8* TRgbBufferPtr;

    37 

    38 	enum 

    39 		{

    40 		KRgbBufferPixelSize = 3,

    41 		};

    42 		

    43 	/**

    44 	colour component indeces when accessing EColor16M mode bitmap

    45 	*/

    46 	enum 

    47 	    {

    48 	    KBlueCompIdx    = 0,

    49 	    KGreenCompIdx   = 1,

    50 	    KRedCompIdx     = 2

    51 	    };

    52 public:

    53     typedef const TUint8* TConstRgbBufferPtr;

    54 	

    55 	static CRgbBufferPtr* NewL(CFbsBitmap& aBitmap, const TSize& aMCUSizeinPixels);

    56 	

    57 	~CRgbBufferPtr();

    58 	

    59 	TConstRgbBufferPtr LockBuffer(const TPoint& aTopLeft);

    60 	void UnlockBuffer();

    61 	

    62 	// must be used only within a line, can't span lines

    63 	static inline TConstRgbBufferPtr ShiftPtr(TConstRgbBufferPtr aPtr, TInt aOffset);

    64 

    65 	inline TInt NextLineOffset() const;

    66 	inline TInt PtrShiftValueMCU16(TUint aNumberOfPixels) const;

    67 	inline TInt PtrShiftValueMCU8(TUint aNumberOfPixels) const;

    68 		

    69 	static inline TUint8 Red(TConstRgbBufferPtr aPtr);

    70 	static inline TUint8 Green(TConstRgbBufferPtr aPtr);

    71 	static inline TUint8 Blue(TConstRgbBufferPtr aPtr);

    72 	

    73 protected:

    74     static inline TRgbBufferPtr ShiftPtr(TRgbBufferPtr aPtr, TInt aOffset);

    75     static inline TRgbBufferPtr Coord2Ptr(TRgbBufferPtr aBase, TInt aX, TInt aY);

    76     static inline TInt Coord2Size(TInt aX, TInt aY);

    77     

    78 private:

    79     CRgbBufferPtr(CFbsBitmap& aBitmap, const TSize& aMCUSizeinPixels);

    80     void ConstructL();

    81     

    82 private:

    83 	TConstRgbBufferPtr      iLockedPtr;

    84 	TRgbBufferPtr           iRgbBuffer;

    85 	TRgbBufferPtr           iOriginalRgbBuffer;

    86 	TBool					iBitmapDirectAccess;

    87 	TInt					iBitmapScanlineLength;

    88 	

    89 	const TSize             iBitmapSize;

    90 	const TSize             iMCUSizeinPixels;

    91 

    92 	TInt                    iNextLineOffset;

    93 	TInt                    iBufferScanlineLength;

    94     TSize                   iBufferSizeInPixels;

    95     TPoint                  iBufferPos;

    96 

    97 	CFbsBitmap*             iBitmap;

    98 	TUint32*				iBitmapData;

    99 	

   100 	};	

   101 

   102 #include "rgbbufferptr.inl"

   103 

   104 #endif // ndef RGBBUFFERPTR_H

   105 

   106