// 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++;

	}