Symaptic: os/graphics/graphicsdeviceinterface/directgdiadaptation/swsrc/pixelutil.h@bde4ae8d615e

     1 // Copyright (c) 2007-2009 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 //

    16 #ifndef PIXELUTIL_H

    17 #define PIXELUTIL_H

    19 /**

    20 @file

    21 @internalComponent

    22 */

    24 #include <e32cmn.h>

    25 #include <gdi.h>

    26 #include <pixelformats.h>

    28 /**

    29 Provides conversion between TDisplayMode/TUidPixelFormat and other pixel format related functionality.

    30 */

    31 NONSHARABLE_STRUCT(PixelFormatUtil)

    32 	{

    33 	static TUidPixelFormat ConvertToPixelFormat(TDisplayMode aDisplayMode);

    34 	static TBool HasAlpha(TUidPixelFormat aPixelFormat);

    35 	static TInt BitsPerPixel(TUidPixelFormat aPixelFormat);

    36 	static TDisplayMode ConvertToDisplayMode(TUidPixelFormat aPixelFormat);

    37 	};

    39 /**

    40 Provides access to the contents of a pixel buffer. Functionality includes copying pixels into

    41 user buffer and perform format conversion or scaling up/down. Copying can be performed

    42 horizontally from left to right  or right to left, and vertically from top to bottom or bottom

    43 to up.

    45 Supported buffer pixel format:

    46 -EUidPixelFormatRGB_565

    47 -EUidPixelFormatXRGB_8888

    48 -EUidPixelFormatARGB_8888

    49 -EUidPixelFormatARGB_8888_PRE

    51 Supported read pixel format:

    52 -EUidPixelFormatRGB_565

    53 -EUidPixelFormatXRGB_8888

    54 -EUidPixelFormatARGB_8888

    55 -EUidPixelFormatARGB_8888_PRE

    56 */

    57 NONSHARABLE_CLASS(TPixelBufferReader)

    58 	{

    59 public:

    60 	enum TReadDirection

    61 		{

    62 		EReadHorizontal,

    63 		EReadHorizontalReverse,

    64 		EReadVertical,

    65 		EReadVerticalReverse

    66 		};

    68 	TPixelBufferReader(const TUint32* aPixelBuffer, const TSize& aSize, TInt aStride,TUidPixelFormat aFormat);

    70 	void GetScanLine(TDes8& aReadBuf, const TPoint& aReadPos, TInt aReadLen,

    71 			TUidPixelFormat aReadFormat, TReadDirection aReadDir) const;

    72 	void GetScaledScanLine(TDes8& aReadBuf, const TPoint& aReadPos, TInt aClipDestPos,

    73 			TInt aClipDestLen, TInt aDestLen, TInt aSrcLen, TUidPixelFormat aReadFormat,

    74 			TReadDirection aReadDir) const;

    76 	const TUint32* GetPixelAddr(const TPoint& aPos) const;

    78 private:

    79 	TPixelBufferReader(); //declare but not defined

    80 	const TUint32* GetScanLineAddr(TInt aRow) const;

    82 	void GetScanLineRGB_565(TDes8& aReadBuf, const TPoint& aReadPos, TInt aReadLen, TReadDirection aReadDir) const;

    83 	void GetScanLineXRGB_8888(TDes8& aReadBuf, const TPoint& aReadPos, TInt aReadLen, TReadDirection aReadDir) const;

    84 	void GetScanLineARGB_8888(TDes8& aReadBuf, const TPoint& aReadPos, TInt aReadLen, TReadDirection aReadDir) const;

    85 	void GetScanLineARGB_8888_PRE(TDes8& aReadBuf, const TPoint& aReadPos, TInt aReadLen, TReadDirection aReadDir) const;

    87 	void CopyFromRGB_565(TUint32* aDestPtr, const TUint16* aSrcPtr, TInt aLen, TInt aAdvance) const;

    88 	TInt GetAdvance(TReadDirection aReadDir) const;

    90 	void GetScaledScanLineH(TDes8& aReadBuf, const TPoint& aReadPos, TInt aClipDestPos,

    91 			TInt aClipDestLen, TInt aDestLen, TInt aSrcLen, TUidPixelFormat aReadFormat,

    92 			TReadDirection aReadDir) const;

    93 	void GetScaledScanLineV(TDes8& aReadBuf, const TPoint& aReadPos, TInt aClipDestPos,

    94 			TInt aClipDestLen, TInt aDestLen, TInt aSrcLen, TUidPixelFormat aReadFormat,

    95 			TReadDirection aReadDir) const;

    97 private:

    98 	const TUint32* iBuffer;

    99 	TSize iSize;

   100 	TInt iStride;

   101 	TUidPixelFormat iFormat;

   102 	};

   104 #endif /*PIXELUTIL_H*/

author	sl@SLION-WIN7.fritz.box
	Fri, 15 Jun 2012 03:10:57 +0200
changeset 0	bde4ae8d615e
permissions	-rw-r--r--