sl@0: // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #ifndef PIXELUTIL_H
sl@0: #define PIXELUTIL_H
sl@0: 
sl@0: /**
sl@0: @file
sl@0: @internalComponent
sl@0: */
sl@0: 
sl@0: #include <e32cmn.h>
sl@0: #include <gdi.h>
sl@0: #include <pixelformats.h>
sl@0: 
sl@0: /**
sl@0: Provides conversion between TDisplayMode/TUidPixelFormat and other pixel format related functionality.
sl@0: */
sl@0: NONSHARABLE_STRUCT(PixelFormatUtil)
sl@0: 	{
sl@0: 	static TUidPixelFormat ConvertToPixelFormat(TDisplayMode aDisplayMode);
sl@0: 	static TBool HasAlpha(TUidPixelFormat aPixelFormat);
sl@0: 	static TInt BitsPerPixel(TUidPixelFormat aPixelFormat);
sl@0: 	static TDisplayMode ConvertToDisplayMode(TUidPixelFormat aPixelFormat);
sl@0: 	};
sl@0: 
sl@0: /**
sl@0: Provides access to the contents of a pixel buffer. Functionality includes copying pixels into 
sl@0: user buffer and perform format conversion or scaling up/down. Copying can be performed 
sl@0: horizontally from left to right  or right to left, and vertically from top to bottom or bottom
sl@0: to up.
sl@0: 
sl@0: Supported buffer pixel format:
sl@0: -EUidPixelFormatRGB_565
sl@0: -EUidPixelFormatXRGB_8888
sl@0: -EUidPixelFormatARGB_8888
sl@0: -EUidPixelFormatARGB_8888_PRE
sl@0: 
sl@0: Supported read pixel format:
sl@0: -EUidPixelFormatRGB_565
sl@0: -EUidPixelFormatXRGB_8888
sl@0: -EUidPixelFormatARGB_8888
sl@0: -EUidPixelFormatARGB_8888_PRE
sl@0: */
sl@0: NONSHARABLE_CLASS(TPixelBufferReader)
sl@0: 	{
sl@0: public:
sl@0: 	enum TReadDirection
sl@0: 		{
sl@0: 		EReadHorizontal,
sl@0: 		EReadHorizontalReverse,
sl@0: 		EReadVertical,
sl@0: 		EReadVerticalReverse
sl@0: 		};
sl@0: 
sl@0: 	TPixelBufferReader(const TUint32* aPixelBuffer, const TSize& aSize, TInt aStride,TUidPixelFormat aFormat);
sl@0: 
sl@0: 	void GetScanLine(TDes8& aReadBuf, const TPoint& aReadPos, TInt aReadLen,
sl@0: 			TUidPixelFormat aReadFormat, TReadDirection aReadDir) const;
sl@0: 	void GetScaledScanLine(TDes8& aReadBuf, const TPoint& aReadPos, TInt aClipDestPos,
sl@0: 			TInt aClipDestLen, TInt aDestLen, TInt aSrcLen, TUidPixelFormat aReadFormat,
sl@0: 			TReadDirection aReadDir) const;
sl@0: 
sl@0: 	const TUint32* GetPixelAddr(const TPoint& aPos) const;
sl@0: 
sl@0: private:
sl@0: 	TPixelBufferReader(); //declare but not defined
sl@0: 	const TUint32* GetScanLineAddr(TInt aRow) const;
sl@0: 
sl@0: 	void GetScanLineRGB_565(TDes8& aReadBuf, const TPoint& aReadPos, TInt aReadLen, TReadDirection aReadDir) const;
sl@0: 	void GetScanLineXRGB_8888(TDes8& aReadBuf, const TPoint& aReadPos, TInt aReadLen, TReadDirection aReadDir) const;
sl@0: 	void GetScanLineARGB_8888(TDes8& aReadBuf, const TPoint& aReadPos, TInt aReadLen, TReadDirection aReadDir) const;
sl@0: 	void GetScanLineARGB_8888_PRE(TDes8& aReadBuf, const TPoint& aReadPos, TInt aReadLen, TReadDirection aReadDir) const;
sl@0: 
sl@0: 	void CopyFromRGB_565(TUint32* aDestPtr, const TUint16* aSrcPtr, TInt aLen, TInt aAdvance) const;
sl@0: 	TInt GetAdvance(TReadDirection aReadDir) const;
sl@0: 
sl@0: 	void GetScaledScanLineH(TDes8& aReadBuf, const TPoint& aReadPos, TInt aClipDestPos,
sl@0: 			TInt aClipDestLen, TInt aDestLen, TInt aSrcLen, TUidPixelFormat aReadFormat,
sl@0: 			TReadDirection aReadDir) const;
sl@0: 	void GetScaledScanLineV(TDes8& aReadBuf, const TPoint& aReadPos, TInt aClipDestPos,
sl@0: 			TInt aClipDestLen, TInt aDestLen, TInt aSrcLen, TUidPixelFormat aReadFormat,
sl@0: 			TReadDirection aReadDir) const;
sl@0: 
sl@0: private:
sl@0: 	const TUint32* iBuffer;
sl@0: 	TSize iSize;
sl@0: 	TInt iStride;
sl@0: 	TUidPixelFormat iFormat;
sl@0: 	};
sl@0: 
sl@0: #endif /*PIXELUTIL_H*/