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