// Copyright (c) 1997-2009 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:

//

#include "SCDRAW.H"

#include "_WININC.H"

TInt CDrawTwoBppScreenBitmap::InitScreen()

	{

	TRect drawRect;

	GetDrawRect(drawRect);

    RWindows* window = ::WindowHandler(iScreenNo);

	window->iDisplayMode = DisplayMode();

	window->iEpocBitmapSize = drawRect.Size();

	window->iEpocBitmapLinePitch = (iScanLineWords*4);

	return KErrNone;

	}

void CDrawTwoBppScreenBitmap::OrientationsAvailable(TBool aOrientation[4])

	{

	aOrientation[EOrientationNormal] = ETrue;

	aOrientation[EOrientationRotated90] = EFalse;

	aOrientation[EOrientationRotated180] = EFalse;

	aOrientation[EOrientationRotated270] = EFalse;

	}

void CDrawTwoBppScreenBitmap::UpdateRect(const TRect& aRect) const

	{

	ASSERT(aRect.iTl.iX >= 0 && aRect.iTl.iY >= 0);

	ASSERT(aRect.iBr.iX <= iSize.iWidth);

	ASSERT(aRect.iBr.iY <= iSize.iHeight);

	const TUint8 gray4lookup[4] = {0, 85, 170, 255};

	TInt lx = aRect.iTl.iX & ~0xf;

	TInt rx = (aRect.iBr.iX + 15) & ~0xf;

	TUint8* srcePtr = ((TUint8*)(ScanLine(aRect.iTl.iY))) + (lx / 4);

	TUint8* srcePtrLimit = srcePtr + ((rx - lx) / 4);

	TInt byteWidth = iScanLineWords * 4;

	for(TInt row = aRect.iTl.iY; row < aRect.iBr.iY; row++)

		{

		TUint8* tempSrcePtr = srcePtr;

		TUint8* destPixel = WinPixelAddress(lx,row);

		while (tempSrcePtr < srcePtrLimit)

			{

			TUint8 pixelValue1 = *tempSrcePtr++;

			TUint8 pixelValue2 = TUint8((pixelValue1 >> 2) & 0x03);

			TUint8 pixelValue3 = TUint8((pixelValue1 >> 4) & 0x03);

			TUint8 pixelValue4 = TUint8((pixelValue1 >> 6) & 0x03);

			pixelValue1 &= 0x03;

			TUint8 pixelGray = gray4lookup[pixelValue1];

			destPixel[0] = pixelGray;

			destPixel[1] = pixelGray;

			destPixel[2] = pixelGray;

			pixelGray = gray4lookup[pixelValue2];

			destPixel[3] = pixelGray;

			destPixel[4] = pixelGray;

			destPixel[5] = pixelGray;

			pixelGray = gray4lookup[pixelValue3];

			destPixel[6] = pixelGray;

			destPixel[7] = pixelGray;

			destPixel[8] = pixelGray;

			pixelGray = gray4lookup[pixelValue4];

			destPixel[9] = pixelGray;

			destPixel[10] = pixelGray;

			destPixel[11] = pixelGray;

			destPixel += 12;

			}

		srcePtr += byteWidth;

		srcePtrLimit += byteWidth;

		}

	}