// Copyright (c) 1995-2009 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 "wsgraphicdrawercontext.h"

 #include "stdgraphictestdrawer.h"

 CWsGraphicDrawerTestFrameRate* CWsGraphicDrawerTestFrameRate::CreateL()

 	{

 	return new(ELeave) CWsGraphicDrawerTestFrameRate;

 	}

 CWsGraphicDrawerTestFrameRate::CWsGraphicDrawerTestFrameRate()

 	{

 	}

 CWsGraphicDrawerTestFrameRate::~CWsGraphicDrawerTestFrameRate()

 	{

 	if (iContext)

 		{

 		iContext->Destroy();

 		iContext = NULL;

 		}

 	}

 void CWsGraphicDrawerTestFrameRate::ConstructL(MWsGraphicDrawerEnvironment& aEnv,const TGraphicDrawerId& aId,MWsClient& aOwner,const TDesC8& /*aData*/)

 	{

 	BaseConstructL(aEnv,aId,aOwner);

 	if (!(aEnv.Screen(0)->ResolveObjectInterface(KMWsCompositionContext) || aEnv.Screen(0)->ResolveObjectInterface(KMWsScene)))

 		{

 		iContext = CWsGraphicDrawerNonNgaContext::NewL();

 		}

 	else

 		{

 		iContext = CWsGraphicDrawerNgaContext::NewL();

 		}

 	}

 void CWsGraphicDrawerTestFrameRate::DoDraw(MWsGc& aGc,const TRect& aRect,const TDesC8& /*aData*/) const

 	{

 	if (KErrNone != iContext->Push(aGc))

 		{

 		return;

 		}

 	//Simplification: treats all screens the same

 	iContext->DrawFrameRate(aGc, aRect, iFps);

 	//Count this draw		

 	iFps.Sample();

 	//Schedule a redraw

 	iContext->ScheduleAnimation(aGc,aRect,0); // as fast as possible

 	iContext->Pop(aGc);

 	}

 void CWsGraphicDrawerTestFrameRate::HandleMessage(const TDesC8& /*aData*/)

 	{

 	}

 TInt CFrameRate::Fps() const

 	{

 	if(iNumSamples > 1)

 		{

 		const TUint count = Min(iNumSamples,KMaxSamples);		

 		TInt64 earliest = iSamples[0];

 		TInt64 latest = earliest;

 		for(TInt i=1; i<count; i++)

 			{

 			const TInt64 sample = iSamples[i];

 			earliest = Min(earliest,sample);

 			latest = Max(latest,sample);

 			}

 		const TInt64 duration = latest - earliest;

 		const TInt microspf = (duration / count);

 		if(microspf)

 			{

 			const TInt millispf = (microspf / 1000);

 			if(millispf)

 				{

 				const TInt fps = (1000 / millispf);

 				return fps;

 				}

 			}

 		}

 	return 0;

 	}

 TInt CFrameRate::CountSamples() const

 	{

 	return iNumSamples;

 	}

 void CFrameRate::Sample() const

 	{

 	//Add the current tick to the stats for next time

 	TTime now;

 	now.UniversalTime();

 	iSamples[iNumSamples % KMaxSamples] = now.Int64();

 	iNumSamples++;

 	}