/*

* Copyright (c) 2008 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 "HuiFxFilterLayer.h"

#include "HuiFxFilter.h"

CHuiFxFilterLayer* CHuiFxFilterLayer::NewL(CHuiFxFilter* aFilter)

    {

    CHuiFxFilterLayer* e = new (ELeave) CHuiFxFilterLayer();

    CleanupStack::PushL(e);

    e->ConstructL(aFilter);

    CleanupStack::Pop(e);

    return e;

    }

CHuiFxFilterLayer::CHuiFxFilterLayer()

    {

#ifdef HUIFX_TRACE        

    RDebug::Print(_L("CHuiFxFilterLayer::CHuiFxFilterLayer - 0x%x "), this);

#endif

    }

CHuiFxFilterLayer::~CHuiFxFilterLayer()

    {

    delete iFilter;

    iFilter = NULL;

#ifdef HUIFX_TRACE 

    RDebug::Print(_L("CHuiFxFilterLayer::~CHuiFxFilterLayer - 0x%x "), this);

#endif

    }

EXPORT_C CHuiFxFilterLayer *CHuiFxFilterLayer::CloneL() const

{

    CHuiFxFilter *filter = iFilter->CloneL();

    CHuiFxFilterLayer *layer = CHuiFxFilterLayer::NewL(filter);

    layer->CHuiFxLayer::CopyFromL(this);

    return layer;

}

EXPORT_C void CHuiFxFilterLayer::SetExtRect( TRect * /*aExtRect*/ )

    {

    // iFilter does not need these

    }

EXPORT_C void CHuiFxFilterLayer::SetVisual( CHuiVisual * /*aVisual*/ )

    {

    // iFilter does not need these

    }

EXPORT_C void CHuiFxFilterLayer::SetVisual( MHuiEffectable *aVisual )

    {

    // iFilter does not need these

    }

EXPORT_C void CHuiFxFilterLayer::ConstructL(CHuiFxFilter* aFilter)

    {

    CHuiFxLayer::ConstructL( ELayerTypeFilter );

    iFilter = aFilter;

    }

EXPORT_C TBool CHuiFxFilterLayer::PrepareDrawL(CHuiFxEngine& aEngine)

    {

    return iFilter->PrepareDrawL(aEngine);

    }

EXPORT_C TBool CHuiFxFilterLayer::Changed() const

    {

#ifdef HUIFX_TRACE 

    RDebug::Print(_L("CHuiFxFilterLayer::Changed - 0x%x %d"), this,iFilter->Changed() );

#endif

    return iFilter->Changed();

    }

EXPORT_C void CHuiFxFilterLayer::AdvanceTime(TReal32 aElapsedTime)

    {

    iFilter->AdvanceTime(aElapsedTime);

    }

EXPORT_C void CHuiFxFilterLayer::Draw(CHuiFxEngine& aEngine, CHuiGc& aGc, CHuiFxRenderbuffer& aTarget, CHuiFxRenderbuffer& aSource)

    {

#ifdef HUIFX_TRACE 

	RDebug::Print(_L("CHuiFxFilterLayer::Draw - 0x%x "), this);

#endif

// TODO: fast path

    CHuiFxRenderbuffer* backBuffer = aEngine.AcquireRenderbuffer(TargetRect().Size());

    if (!backBuffer)

        {

        return;

        }

    // Render the filter

    TRect targetRect(TPoint(0, 0), TargetRect().Size());

    TInt alpha = 0xff; // TODO

    iFilter->Draw(aEngine, aGc, *backBuffer, aSource, targetRect, SourceRect());

    // Composite the result

    TRect compositionSourceRect(targetRect);

    TRect compositionTargetRect(TargetRect());

    compositionTargetRect.Move(-aTarget.Position());

    aEngine.Composite(aTarget, *backBuffer, compositionTargetRect, compositionSourceRect, BlendingMode(), alpha);

    aEngine.ReleaseRenderbuffer(backBuffer);

    }

EXPORT_C TBool CHuiFxFilterLayer::Margin(TMargins &m)

   {

   TMargins s = iFilter->Margin2();

   m.iTop = s.iTop;

   m.iBottom = s.iBottom;

   m.iLeft = s.iLeft;

   m.iRight = s.iRight;

   return ETrue;

   }

EXPORT_C CHuiFxFilter& CHuiFxFilterLayer::Filter() const

    {

    return *iFilter;

    }

TBool CHuiFxFilterLayer::IsFiltered() const

    {

    return ETrue;

    }