// Copyright (c) 1995-2009 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:

//

#if !defined(__BITMAP_H__)

#define __BITMAP_H__

#if !defined(__E32STD_H__)

#include <e32std.h>

#endif

#if !defined(__F32FILE_H__)

#include <f32file.h>

#endif

#if !defined(__GDI_H__)

#include <gdi.h>

#endif

#ifndef SYMBIAN_ENABLE_SPLIT_HEADERS

#include <graphics/bitmapuid.h>

#endif

#ifdef _DEBUG

	#define SYMBIAN_DEBUG_FBS_LOCKHEAP

#endif

//Forward declarations

class CChunkPile;

class TCompressionBookMark;

class CFbsRasterizer;

/** 

Defines the types of file compression. 

@publishedAll

@released

*/

enum TBitmapfileCompression

	{

	/** Bitmap file is not compressed. */

	ENoBitmapCompression,

	/** File is compressed using run-length encoding compression. */

	EByteRLECompression,

	/** File is compressed using twelve bit run-length encoding compression. */

	ETwelveBitRLECompression,

	/** File is compressed using sixteen bit run-length encoding compression. */

	ESixteenBitRLECompression,

	/** File is compressed using twenty four bit run-length encoding compression. */

	ETwentyFourBitRLECompression,

	/** File is compressed using twenty four bit run-length encoding compression from 32-bit bitmap buffer. */

	EThirtyTwoUBitRLECompression,

	/** File is compressed using thirty two bit run-length encoding compression from 32-bit bitmap buffer. */

	EThirtyTwoABitRLECompression,

	/** File is compressed as a palette plus reduced bit-per-pixel.  Only applicable to bitmaps already loaded in RAM. */

	EGenericPaletteCompression,

	/** Extended bitmap. Data format is proprietary to licensee. */

	EProprietaryCompression,

	//Insert new enum items here!

	ERLECompressionLast = 255

	};

/** 

Defines the available file compression schemes. 

@publishedAll

@released

*/

enum TBitmapfileCompressionScheme

	{

	/** File is compressed using run-length encoding compression. */

	ERLECompression,

	/** File is compressed as a palette plus reduced bit-per-pixel. */

	EPaletteCompression,

	/** File is compressed as a palette plus reduced bit-per-pixel, with automatic fallback to RLE if bitmap is not suitable*/

	EPaletteCompressionWithRLEFallback

	};

/**

WARNING: Typedef for internal use ONLY. Compatibility is not guaranteed in future releases.

@publishedAll

@released

 */

typedef void (*TAssignFunction)(TUint8*& aDestPtr, TUint32 aColor);

/**

WARNING: Typedef for internal use ONLY. Compatibility is not guaranteed in future releases.

@publishedAll

@released

 */

typedef void (*TDecodeFunction)(TUint8* aDataPtr, TUint32* aPalettePtr, TUint8*& aDestPtr, TAssignFunction aAssignFunction);

/** 

Contains information about the bitmap when streaming bitmaps to stores. 

@publishedAll

@released

*/

class SEpocBitmapHeader

	{

public:

	inline SEpocBitmapHeader() :

		iBitmapSize(sizeof(SEpocBitmapHeader)),

		iStructSize(sizeof(SEpocBitmapHeader)),

		iSizeInPixels(0, 0),

		iSizeInTwips(0, 0),

		iBitsPerPixel(0),

		iColor(0),

		iPaletteEntries(0),

		iCompression(ENoBitmapCompression)

		{

		}

public:

	/** Defines whether bitmap is colour and if it comprises an alpha channel. */ 

	enum TColor 

		{

		/** Bitmap doesn't comprise color */

		ENoColor=0, 

		/** Bitmap comprises color */

		EColor=1, 

		/** Bitmap comprises color with alpha channel */

		EColorAlpha=2, 

		/** Bitmap comprises pre-multiplied colors with alpha channel */

		EColorAlphaPM=3,

		/** Unknown format */

		EColorUndefined=8

		};

public:

	/** The size of the bitmap data, in bytes. */

	TInt iBitmapSize;

	/** The size of the structure in which the bitmap data is stored. */

	TInt iStructSize;

	/** The size of the bitmap, in pixels. */

	TSize iSizeInPixels;

	/** The size of the bitmap, in twips. */

	TSize iSizeInTwips;

	/** The bitmap's number of bits per pixel */

	TInt iBitsPerPixel;

	/** Whether or not the bitmap is colour and comprises an alpha value. */

	TInt iColor;

	/** The number of entries in the bitmap's palette. */

	TInt iPaletteEntries;

	/** The type of compression used to store the bitmap. */

	TBitmapfileCompression iCompression;

	};

/**

WARNING: Class for internal use ONLY.  Compatibility is not guaranteed in future releases.

@publishedAll

@released 

 */

class TLineScanningPosition

	{

public:

	inline TLineScanningPosition(TUint32* aSrcDataPtr);

public:

	TUint8* iSrcDataPtr;

	TInt iCursorPos;

	HBufC8* iScanLineBuffer;

	CFbsRasterizer* const iRasterizer;

	};

class CShiftedFileStore;

/**

BitGdi bitmap class (pseudo-CXxx class).

WARNING: Class for internal use ONLY.  Compatibility is not guaranteed in future releases.

@released

*/

class CBitwiseBitmap

	{

	friend class CFbTop;

	friend class CFbClient;

	friend class CFbsBitmap;

	friend class CBitmapObject;

	friend class CFbsBitmapAsyncStreamer;

	friend class CFbsBackgroundCompression;

	friend class CleanupDelete<CBitwiseBitmap>;

public:

	IMPORT_C TUid Uid() const;

	IMPORT_C void ExternalizeL(RWriteStream& aStream,const CFbsBitmap& aHandleBitmap) const;

	IMPORT_C void ExternalizeRectangleL(RWriteStream& aStream,const TRect& aRect,const CFbsBitmap& aHandleBitmap) const;

	IMPORT_C void InternalizeL(RReadStream& aStream);

	IMPORT_C static void InternalizeHeaderL(RReadStream& aStream,SEpocBitmapHeader& aHeader);

	IMPORT_C TSize SizeInPixels() const;

	IMPORT_C TSize SizeInTwips() const;

	IMPORT_C TDisplayMode DisplayMode() const;

	IMPORT_C TInt HorizontalTwipsToPixels(TInt aTwips) const;

	IMPORT_C TInt VerticalTwipsToPixels(TInt aTwips) const;

	IMPORT_C TInt HorizontalPixelsToTwips(TInt aPixels) const;

	IMPORT_C TInt VerticalPixelsToTwips(TInt aPixels) const;

	IMPORT_C void GetPixel(TRgb& aColor,const TPoint& aPos,TUint32* aBase, CFbsRasterizer* aRasterizer) const;

	IMPORT_C TInt GetScanLinePtr(TUint32*& aSlptr, TPoint& aPixel,TInt aLength, TUint32* aBase, TLineScanningPosition& aLineScanningPosition) const;

	IMPORT_C TInt GetScanLinePtr(TUint32*& aSlptr, TInt& aLength, TPoint& aPixel,TUint32* aBase, TLineScanningPosition& aLineScanningPosition) const;

	IMPORT_C void GetScanLine(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TBool aDither,const TPoint& aDitherOffset,TDisplayMode aDispMode,TUint32* aBase, TLineScanningPosition& aLineScanningPosition) const;

	IMPORT_C void GetScanLine(TUint32*& aSlptr, TDes8& aBuf,const TPoint& aPixel,TInt aLength,TBool aDither,const TPoint& aDitherOffset,TDisplayMode aDispMode) const;

	IMPORT_C void GetScanLine(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TBool aDither,const TPoint& aDitherOffset,TDisplayMode aDispMode,TUint32* aBase) const;

	IMPORT_C void GetVerticalScanLine(TDes8& aBuf,TInt aX,TBool aDither,const TPoint& aDitherOffset,TDisplayMode aDispMode,TUint32* aBase, CFbsRasterizer* aRasterizer) const;

	IMPORT_C void StretchScanLine(TDes8& aBuf,const TPoint& aPixel,TInt aClipStrchX,TInt aClipStrchLen,TInt aStretchLength,TInt aOrgX,TInt aOrgLen,const TPoint& aDitherOffset,TDisplayMode aDispMode,TUint32* aBase) const;

	IMPORT_C void StretchScanLine(TDes8& aBuf,const TPoint& aPixel,TInt aClipStrchX,TInt aClipStrchLen,TInt aStretchLength,TInt aOrgX,TInt aOrgLen,const TPoint& aDitherOffset,TDisplayMode aDispMode,TUint32* aBase, TLineScanningPosition& aLineScanningPosition) const;

	IMPORT_C TUint32* ScanLineAddress(TUint32* aBase,TUint aY) const;

	IMPORT_C TBool IsMonochrome(TUint32* aBase) const;

	IMPORT_C TBool IsLargeBitmap() const;

	IMPORT_C TInt CompressData();

	IMPORT_C TInt CompressData(TBitmapfileCompressionScheme aScheme);

	IMPORT_C TInt CheckBackgroundCompressData();

	IMPORT_C void SetCompressionBookmark(TLineScanningPosition& aLineScanningPosition, TUint32* aBase, const CFbsBitmap* aFbsBitmap);

	IMPORT_C TInt HardwareBitmapHandle() const;

	IMPORT_C TBool IsCompressedInRAM() const;

	IMPORT_C TBool IsCompressed() const;

	IMPORT_C TInt DataStride() const;

	IMPORT_C SEpocBitmapHeader Header() const;

private:

	IMPORT_C void operator delete(TAny*);

	void operator delete(TAny*, TAny*) {}     // This function exists only to prevent a compiler warning

	IMPORT_C CBitwiseBitmap(RHeap* aHeap,CChunkPile* aPile);

	IMPORT_C ~CBitwiseBitmap();

	IMPORT_C void Reset();

	IMPORT_C TInt Construct(const TSize& aSize,TDisplayMode aDispMode,TUid aCreatorUid);

	IMPORT_C TInt ConstructExtended(const TSize& aSize, TDisplayMode aDispMode, TUid aType, TInt aDataSize);

	IMPORT_C void ConstructL(RFs& aFs,const TDesC& aFilename,TInt32 aId,TUint aFileOffset);

	IMPORT_C void ConstructL(RFile& aFile,TInt32 aId,TUint aFileOffset);

	IMPORT_C void ConstructL(CShiftedFileStore* aFileStore,TStreamId aStreamId);

	IMPORT_C TInt CopyData(const CBitwiseBitmap& aSourceBitmap);

private:

	void GenerateLineFromCompressedTwelveBitData(TUint8* aDestBuffer, const TPoint& aPixel,TInt aLength,TUint32* aBase, TLineScanningPosition& aLineScanningPosition) const;

	void GenerateLineFromCompressedEightBitData(TUint8* aDestBuffer, const TPoint& aPixel,TInt aLength,TUint32* aBase, TLineScanningPosition& aLineScanningPosition) const;

	TUint8 GetGrayPixelEx(TInt aX,TUint32* aScanLineAddress) const;

	TRgb GetRgbPixelEx(TInt aX,TUint32* aScanLineAddress) const;

	void GetRgbPixelExMany(TInt aX,TUint32* aScanlinePtr,TUint32* aDest,TInt aLength) const;

    void GetRgbPixelExMany16M(TInt aX,TUint32* aScanlinePtr,TUint8* aDest,TInt aLength) const;

    void GetRgbPixelExMany16MAP(TInt aX,TUint32* aScanlinePtr,TUint32* aDest,TInt aLength) const;

	void GetScanLineGray2(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TBool aDither,const TPoint& aDitherOffset,TUint32* aScanlinePtr) const;

	void GetScanLineGray4(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TBool aDither,const TPoint& aDitherOffset,TUint32* aScanlinePtr) const;

	void GetScanLineGray16(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TUint32* aScanlinePtr) const;

	void GetScanLineGray256(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TUint32* aScanlinePtr) const;

	void GetScanLineColor16(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TUint32* aScanlinePtr) const;

	void GetScanLineColor256(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TUint32* aScanlinePtr) const;

	void GetScanLineColor4K(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TUint32* aScanlinePtr) const;

	void GetScanLineColor64K(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TUint32* aScanlinePtr) const;

	void GetScanLineColor16M(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TUint32* aScanlinePtr) const;

	void GetScanLineColor16MU(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TUint32* aScanlinePtr) const;

	void GetScanLineColorRgb(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TUint32* aScanlinePtr) const;

	void GetScanLineExBits(TDes8& aBuf,TInt aX,TInt aLength,TUint32* aScanlinePtr) const;

	void GetScanLineExBytes(TDes8& aBuf,TInt aX,TInt aLength,TUint32* aScanlinePtr) const;

	void DoExternalizeDataCompressedL(RWriteStream& aStream,TUint8* aData,TInt aSizeInBytes) const;

	void DoExternalizeByteDataCompressedL(RWriteStream& aStream,TUint8* aData,TInt aSizeInBytes) const;

	void DoExternalizeTwelveBitDataCompressedL(RWriteStream& aStream,TUint8* aData,TInt aSizeInBytes) const;

	void DoExternalizeSixteenBitDataCompressedL(RWriteStream& aStream,TUint8* aData,TInt aSizeInBytes) const;

	void DoExternalizeTwentyFourBitDataCompressedL(RWriteStream& aStream,TUint8* aData,TInt aSizeInBytes) const;

	void DoExternalizeThirtyTwoUBitDataCompressedL(RWriteStream& aStream,TUint8* aData,TInt aSizeInBytes) const;

	void DoExternalizeThirtyTwoABitDataCompressedL(RWriteStream& aStream,TUint8* aData,TInt aSizeInBytes) const;

	TInt SizeOfDataCompressed(TUint8* aData,TInt aSizeInBytes) const;

	TInt SizeOfByteDataCompressed(TUint8* aData,TInt aSizeInBytes) const;

	TInt SizeOfTwelveBitDataCompressed(TUint8* aData,TInt aSizeInBytes) const;

	TInt SizeOfSixteenBitDataCompressed(TUint8* aData,TInt aSizeInBytes) const;

	TInt SizeOfTwentyFourBitDataCompressed(TUint8* aData,TInt aSizeInBytes) const;

	TInt SizeOfThirtyTwoUBitDataCompressed(TUint8* aData,TInt aSizeInBytes) const;

	TInt SizeOfThirtyTwoABitDataCompressed(TUint8* aData,TInt aSizeInBytes) const;

	TBool TrueColorPointerCompare(TUint8* aColorPointer,TUint8 aComponent1,TUint8 aComponent2,TUint8 aComponent3) const;

	TBool ColorAlphaPointerCompare(TUint8* aColorPointer,TUint8 aComponent1,TUint8 aComponent2,TUint8 aComponent3,TUint8 aComponent4) const;

	void DoInternalizeL(RReadStream& aStream,TInt aSrceSize,TUint32* aBase);

	void DoInternalizeCompressedDataL(RReadStream& aStream,TInt aSrceSize,TUint32* aBase,TBitmapfileCompression aCompression);

	void DoDecompressByteData(TUint8* aDestBuffer,TInt aDestSize,TUint8* aSrceBuffer,TInt aSrceSize);

	void DoDecompressByteDataAltL(RReadStream& aStream,TInt aSrceSizeInBytes,TUint32* aBase);

	void DoDecompressTwelveBitData(TUint8* aDestBuffer,TInt aDestSize,TUint8* aSrceBuffer,TInt aSrceSize);

	void DoDecompressTwelveBitDataAltL(RReadStream& aStream,TInt aSrceSizeInBytes,TUint32* aBase);

	void DoDecompressSixteenBitData(TUint8* aDestBuffer,TInt aDestSize,TUint8* aSrceBuffer,TInt aSrceSize);

	void DoDecompressSixteenBitDataAltL(RReadStream& aStream,TInt aSrceSizeInBytes,TUint32* aBase);

	void DoDecompressTwentyFourBitData(TUint8* aDestBuffer,TInt aDestSize,TUint8* aSrceBuffer,TInt aSrceSize);

	void DoDecompressTwentyFourBitDataAltL(RReadStream& aStream,TInt aSrceSizeInBytes,TUint32* aBase);

	void DoDecompressThirtyTwoUBitData(TUint8* aDestBuffer,TInt aDestSize,TUint8* aSrceBuffer,TInt aSrceSize);

	void DoDecompressThirtyTwoUBitDataAltL(RReadStream& aStream,TInt aSrceSizeInBytes,TUint32* aBase);

	void DoDecompressThirtyTwoABitData(TUint8* aDestBuffer,TInt aDestSize,TUint8* aSrceBuffer,TInt aSrceSize);

	void DoDecompressThirtyTwoABitDataAltL(RReadStream& aStream,TInt aSrceSizeInBytes,TUint32* aBase);

	void DoStretchScanLine(TDes8& aBuf,TInt x,TInt y,TInt aClipStrchX,TInt aClipStrchLen,TInt aStretchLength,TInt aOrgX,TInt aOrgLen,const TPoint& aDitherOffset,TDisplayMode aDispMode,TUint32* aBase,TLineScanningPosition& aLineScanningPosition) const;

	void DoCompressScanLine(TDes8& aBuf,TInt x,TInt y,TInt aClipStrchX,TInt aClipStrchLen,TInt aStretchLength,TInt aOrgX,TInt aOrgLen,const TPoint& aDitherOffset,TDisplayMode aDispMode,TUint32* aBase,TLineScanningPosition& aLineScanningPosition) const;

	TUint32 HashTo1bpp(TUint32 aGray256,TBool aOddX,TBool aOddY) const;

	TUint32 HashTo2bpp(TUint32 aGray256,TInt aDitherIndex) const;

	TBool IsWordMonochrome(TUint32 aWord) const;

	TUint32* DataAddress() const;

	static void WhiteFill(TUint8* aData,TInt aDataSize,TDisplayMode aDispMode);

	static TInt ByteWidth(TInt aPixelWidth,TDisplayMode aDispMode);

	static TInt Bpp(TDisplayMode aDispMode);

	static TInt IsColor(TDisplayMode aDispMode);

	static TDisplayMode DisplayMode(TInt aBpp,TInt aColor);

	static TBitmapfileCompression CompressionType(TInt aBpp, TInt aColor);

	TInt DoGetScanLinePtr(TUint32*& aSlptr, TPoint& aPixel,TInt aLength, TUint32* aBase, TLineScanningPosition& aLineScanningPosition) const;

	void GenerateLineFromCompressedSixteenBitData(TUint8* aDestBuffer, const TPoint& aPixel,TInt aLength, TUint32* aBase, TLineScanningPosition& aLineScanningPosition) const;

	TDisplayMode InitialDisplayMode() const;

	TInt SetDisplayMode(TDisplayMode aDisplayMode, TUint32* aDataAddress);

	TInt DisplayModeArgCheck(TDisplayMode aDisplayMode, TUint32* aDataAddress) const;

	void ChangeDisplayMode( TDisplayMode aNewDisplayMode,

							TInt aScanLineWidthNew,

							TUint8* aDataAddrNew,

							TUint32* aDataAddress,

							TInt aYStart,

							TInt aYInc,

							TInt aYEnd);

	void UpdateBitmapProperties(TDisplayMode aNewDisplayMode);

	TInt SwapWidthAndHeight(TUint32* aDataAddress);	

	void GenerateLineFromCompressed24BitData(TUint8* aDestBuffer, const TPoint& aPixel,TInt aLength, TUint32* aBase, TLineScanningPosition& aLineScanningPosition) const;

	void GenerateLineFromCompressed32UBitData(TUint8* aDestBuffer, const TPoint& aPixel,TInt aLength, TUint32* aBase, TLineScanningPosition& aLineScanningPosition) const;

	void GenerateLineFromCompressed32ABitData(TUint8* aDestBuffer, const TPoint& aPixel,TInt aLength, TUint32* aBase, TLineScanningPosition& aLineScanningPosition) const;

	void AdjustXCoord(TInt& aX) const;

	void GetLineScanPos(TLineScanningPosition& aLineScanPos, 

						const TCompressionBookMark*& aComprBookMark, 

						const TUint8* aBase) const;

	void UpdateBookMark(const TLineScanningPosition& aLineScanPos, 

						TCompressionBookMark* aComprBookMark, 

						const TUint8* aBase) const;

	void GetScanLineColor16MA(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TUint32* aScanlinePtr) const;

	void GetScanLineColor16MAP(TDes8& aBuf,const TPoint& aPixel,TInt aLength,TUint32* aScanlinePtr) const;

	TInt PaletteCompress();

	void GenerateLineFromPaletteCompressedData(TUint8* aDestBuffer, const TPoint& aPixel,TInt aLength, TUint32* aBase, TLineScanningPosition& aLineScanningPosition) const;

	TUint PaletteBitsPerPixel(TInt aNumColors) const;

	TUint PaletteBytesPerPixel(TInt aBitsPerPixel) const;

	void PaletteDecodeAndAssignGeneric(TUint8* aDataPtr, TUint32* aPalettePtr, TUint8*& aDestPtr, TUint aStartPixel, TUint aEndPixel, TUint aCompressedPixelsPerByte, TUint aCompressedBitsPerPixel) const;

	static void PaletteDecode1PixelPerByte(TUint8* aDataPtr, TUint32* aPalettePtr, TUint8*& aDestPtr, TAssignFunction aAssignFunction);

	static void PaletteDecode2PixelPerByte(TUint8* aDataPtr, TUint32* aPalettePtr, TUint8*& aDestPtr, TAssignFunction aAssignFunction);

	static void PaletteDecode4PixelPerByte(TUint8* aDataPtr, TUint32* aPalettePtr, TUint8*& aDestPtr, TAssignFunction aAssignFunction);

	static void PaletteDecode8PixelPerByte(TUint8* aDataPtr, TUint32* aPalettePtr, TUint8*& aDestPtr, TAssignFunction aAssignFunction);

	static void PaletteAssign16BitColor(TUint8*& aDestPtr, TUint32 aColor);

	static void PaletteAssign24BitColor(TUint8*& aDestPtr, TUint32 aColor);

	static void PaletteAssign32BitColor(TUint8*& aDestPtr, TUint32 aColor);

	void UpdatePaddingData(TUint32* aData);

	static void CheckHeaderIsValidL(const SEpocBitmapHeader& aHeader);

	static TInt CompressedFormatInfo(TDisplayMode aDispMode, TInt& aBytesPerPack, TInt& aBytesPerCompressed);

	static void BitmapFill32(TUint32* aDestPtr32, TInt aCount, TUint32 aValue32);

	static inline void BitmapFill16(TUint16* aDestPtr16, TInt aCount, TUint16 aValue16);

private:

	struct TExtra

		{

#ifdef SYMBIAN_DEBUG_FBS_LOCKHEAP

		TInt iLockCount; // number of calls to CFbsBitmap::LockHeap() not balanced by calls to CFbsBitmap::UnlockHeap()

		TThreadId iThreadId; // id of thread that called CFbsBitmap::LockHeap() if any

#endif

		TInt64 iSerialNumber; // serial number of bitmap which is unique to the whole FBServ

		TInt iTouchCount; // number of calls to TouchBitmap()i.e. number of times bitmap has been changed

		};

	inline TExtra* Extra() const; // only for bitmaps created in RAM

private:

	TUid iUid;

	struct TSettings

		{

		TSettings(TDisplayMode aDisplayMode);

		void SetDisplayModes(TDisplayMode aDisplayMode);

		void SetCurrentDisplayMode(TDisplayMode aDisplayMode);

		TDisplayMode CurrentDisplayMode() const;

		TDisplayMode InitialDisplayMode() const;

		inline void SetDirtyBitmap();

		inline TBool IsDirtyBitmap() const;

		inline void SetVolatileBitmap();

		inline TBool IsVolatileBitmap() const;

		enum

			{

			EBitmapFlagDirty = 0x00010000, // set in the old bitmap when a re-allocating operation has created a new bitmap

			EBitmapFlagVolatile = 0x00020000, // set when DataAddress() has been called but BeginDataAccess() has not

			};

		TUint32 iData;

		} iSettings;

	RHeap* iHeap;

	CChunkPile* iPile;

	TInt iByteWidth;

	SEpocBitmapHeader iHeader;

	TInt iSpare;

	TInt iDataOffset; // offset in bytes from "this" or from base of bitmap chunk, or hardware bitmap handle

	TBool iIsCompressedInRAM; //flag indicating whether CompressData has been called

	};

#endif