graphicsdeviceinterface/screendriver/swins/SCMON2.CPP
changeset 0 5d03bc08d59c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graphicsdeviceinterface/screendriver/swins/SCMON2.CPP	Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,95 @@
+// 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;
+		}
+	}
+