diff -r 000000000000 -r 5d03bc08d59c windowing/windowserver/test/t_gdcoverage/gdcoverage.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/windowing/windowserver/test/t_gdcoverage/gdcoverage.cpp	Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,138 @@
+// Copyright (c) 2008-2009 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:
+//
+
+/**
+ @file
+ @test
+ @internalComponent - Internal Symbian test coverage code for GraphicDrawer related code
+*/
+
+#include "gdcoverage.h"
+#include <fbs.h>
+#include <bitdev.h>
+#include <bitstd.h>
+#include <gdi.h>
+#include <graphics/wsscreendevice.h>
+
+const TInt KDefaultScreen = 0;
+
+//
+CWsGraphicDrawerCoverage* CWsGraphicDrawerCoverage::NewL()
+	{
+	return new(ELeave) CWsGraphicDrawerCoverage;
+	}
+	
+CWsGraphicDrawerCoverage::~CWsGraphicDrawerCoverage()
+	{
+	}
+	
+void CWsGraphicDrawerCoverage::ConstructL(
+	MWsGraphicDrawerEnvironment& aEnv,
+	const TGraphicDrawerId& aId,
+	MWsClient& aOwner,
+	const TDesC8& aData)
+	{
+	BaseConstructL(aEnv, aId, aOwner);
+
+	iScreenId = KDefaultScreen;
+	if (aData.Length()>0)
+		iScreenId = aData[0];
+	MWsScreen* scr = aEnv.Screen(iScreenId);
+	User::LeaveIfNull(scr);
+
+	//NGA supports MWsScreenDevice and non-NGA supports MWsScreenConfig, MWsFrontBuffer, MWsBackBuffer
+	MWsScreenDevice* screenDevice = scr->ObjectInterface<MWsScreenDevice>();
+	if(screenDevice)
+		{
+		//empty for now
+		}
+	else
+		{
+		MWsScreenConfig* cfg = scr->ObjectInterface<MWsScreenConfig>();
+		User::LeaveIfNull(cfg);
+		TSize sizeInPixels = cfg->ScreenModeSizeInPixels();
+		__ASSERT_ALWAYS(sizeInPixels.iWidth>0 && sizeInPixels.iHeight>0, User::Invariant());
+		__ASSERT_ALWAYS(cfg->Stride()>0, User::Invariant());
+		__ASSERT_ALWAYS(cfg->ScalingFactor()==TSize(1,1), User::Invariant());
+		__ASSERT_ALWAYS(cfg->Origin()==TPoint(0,0), User::Invariant());
+		
+		MWsFrontBuffer* fBuffer = scr->ObjectInterface<MWsFrontBuffer>();
+		User::LeaveIfNull(fBuffer);
+		__ASSERT_ALWAYS(fBuffer->GetBits()!=NULL, User::Invariant());
+		__ASSERT_ALWAYS(fBuffer->GetBitGc()!=NULL, User::Invariant());
+		}
+
+	MWsScreenRedraw* redraw = scr->ObjectInterface<MWsScreenRedraw>();
+	User::LeaveIfNull(redraw);
+	}
+
+void CWsGraphicDrawerCoverage::HandleMessage(const TDesC8& aData)
+	{
+	// wserv already check data size, and won't invoke this handler if it's empty
+	TBuf8<1> ack;
+	ack.Append(KGdCoverageInfoSig);
+
+	MWsGraphicDrawerEnvironment& env = Env();
+	MWsScreen* scr = env.Screen(iScreenId);
+	MWsScreenRedraw* redraw = scr->ObjectInterface<MWsScreenRedraw>();
+	
+	switch (aData[0])
+		{
+		case KGdCoverageCmdQuery:
+			SendInfo();
+			break;
+
+		case KGdCoverageCmdCoverRedraw:
+			{
+			//Hint: for extra coverage in ScheduleRender find a way to call
+			//CWsTop::WindowServer()->AnimationScheduler()->Animate(*scr);
+		
+			//cannot create a real observer, for coverage null is sufficient
+			redraw->SetObserver(NULL);
+			redraw->IsUpdatePending();
+			TTimeIntervalMicroSeconds interval(1);
+			redraw->ScheduleRender(interval);
+			const TRegion *r = redraw->AnimationRegion();
+			redraw->UpdateDevice();
+			//although redraw is actually a CScreenRedraw, we cannot include
+			//the ScreenRedraw.h here so the following methods are not available:
+			//redraw->AddRedrawRegion(*r, ETrue, ERedrawTopOnly);
+			//redraw->OnAnimation();
+			break;
+			}
+			
+		default:
+			SendMessage(ack);
+			break;
+		}
+	}
+	
+void CWsGraphicDrawerCoverage::DoDraw(MWsGc& /*aGc*/, const TRect& /*aRect*/, const TDesC8& /*aData*/) const
+	{
+	}
+
+void CWsGraphicDrawerCoverage::SendInfo()
+	{
+	TPckgBuf<TGdCoverageInfo> buf;
+	MWsScreen* scr = Env().Screen(iScreenId);
+	if (scr)
+		{
+		buf().iSignature = KGdCoverageInfoSig;
+		buf().iNumTests = 1;
+		}
+	TInt err = SendMessage(buf);
+	__ASSERT_ALWAYS(err>=KErrNone, User::Invariant());
+	}
+