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// Copyright (c) 1997-2009 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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#include "SCDRAW.H"
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#include "_WININC.H"
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TInt CDrawTwoBppScreenBitmap::InitScreen()
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{
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TRect drawRect;
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GetDrawRect(drawRect);
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RWindows* window = ::WindowHandler(iScreenNo);
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window->iDisplayMode = DisplayMode();
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window->iEpocBitmapSize = drawRect.Size();
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window->iEpocBitmapLinePitch = (iScanLineWords*4);
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return KErrNone;
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}
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void CDrawTwoBppScreenBitmap::OrientationsAvailable(TBool aOrientation[4])
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{
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aOrientation[EOrientationNormal] = ETrue;
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aOrientation[EOrientationRotated90] = EFalse;
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aOrientation[EOrientationRotated180] = EFalse;
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aOrientation[EOrientationRotated270] = EFalse;
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}
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void CDrawTwoBppScreenBitmap::UpdateRect(const TRect& aRect) const
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{
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ASSERT(aRect.iTl.iX >= 0 && aRect.iTl.iY >= 0);
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ASSERT(aRect.iBr.iX <= iSize.iWidth);
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ASSERT(aRect.iBr.iY <= iSize.iHeight);
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const TUint8 gray4lookup[4] = {0, 85, 170, 255};
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TInt lx = aRect.iTl.iX & ~0xf;
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TInt rx = (aRect.iBr.iX + 15) & ~0xf;
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TUint8* srcePtr = ((TUint8*)(ScanLine(aRect.iTl.iY))) + (lx / 4);
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TUint8* srcePtrLimit = srcePtr + ((rx - lx) / 4);
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TInt byteWidth = iScanLineWords * 4;
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for(TInt row = aRect.iTl.iY; row < aRect.iBr.iY; row++)
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{
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TUint8* tempSrcePtr = srcePtr;
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TUint8* destPixel = WinPixelAddress(lx,row);
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while (tempSrcePtr < srcePtrLimit)
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{
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TUint8 pixelValue1 = *tempSrcePtr++;
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TUint8 pixelValue2 = TUint8((pixelValue1 >> 2) & 0x03);
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TUint8 pixelValue3 = TUint8((pixelValue1 >> 4) & 0x03);
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TUint8 pixelValue4 = TUint8((pixelValue1 >> 6) & 0x03);
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pixelValue1 &= 0x03;
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TUint8 pixelGray = gray4lookup[pixelValue1];
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destPixel[0] = pixelGray;
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destPixel[1] = pixelGray;
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destPixel[2] = pixelGray;
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pixelGray = gray4lookup[pixelValue2];
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destPixel[3] = pixelGray;
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destPixel[4] = pixelGray;
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destPixel[5] = pixelGray;
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pixelGray = gray4lookup[pixelValue3];
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destPixel[6] = pixelGray;
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destPixel[7] = pixelGray;
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destPixel[8] = pixelGray;
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pixelGray = gray4lookup[pixelValue4];
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destPixel[9] = pixelGray;
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destPixel[10] = pixelGray;
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destPixel[11] = pixelGray;
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destPixel += 12;
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}
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srcePtr += byteWidth;
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srcePtrLimit += byteWidth;
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}
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}
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