/*

* 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:   Basic functionality of color matrix based filters.

*

*/

#include "HuiFxVg10ColorMatrixFilterBase.h"

CHuiFxVg10ColorMatrixFilterBase* CHuiFxVg10ColorMatrixFilterBase::NewL()

    {

    CHuiFxVg10ColorMatrixFilterBase* e = new (ELeave) CHuiFxVg10ColorMatrixFilterBase();

    CleanupStack::PushL(e);

    e->ConstructL();

    CleanupStack::Pop(e);

    return e;

    }

void CHuiFxVg10ColorMatrixFilterBase::ConstructL()

    {

    CHuiFxVg10FilterBase::ConstructL();

    memset(iColorMatrix, 0, sizeof(iColorMatrix));

    }

CHuiFxVg10ColorMatrixFilterBase *CHuiFxVg10ColorMatrixFilterBase::CloneL() const

    {

    CHuiFxVg10ColorMatrixFilterBase *filter = new(ELeave)CHuiFxVg10ColorMatrixFilterBase;

    filter->CopyFromL(this);

    return filter;

    }

void CHuiFxVg10ColorMatrixFilterBase::CopyFromL(const CHuiFxVg10ColorMatrixFilterBase *aOldFilter)

    {

    CHuiFxVg10FilterBase::CopyFromL(aOldFilter);

    memcpy(iColorMatrix, aOldFilter->iColorMatrix, sizeof(iColorMatrix));

    }

void CHuiFxVg10ColorMatrixFilterBase::DrawEffect(CHuiFxEngine& /*aEngine*/, VGImage aTargetImage, VGImage aSourceImage, TInt aWidth, TInt aHeight )

    {

    // take opacity into account

    const VGfloat opacity = clamp(iOpacity, 0.0f, 1.0f);

    if(opacity > EPSILON)

        {

        if(ParameterChanged())

            {

            UpdateColorMatrix();

            }

        vgColorMatrix(aTargetImage, aSourceImage, iColorMatrix);

        }

    else

        {

//        VGint width = vgGetParameteri(aSourceImage, VG_IMAGE_WIDTH);

//        VGint height = vgGetParameteri(aSourceImage, VG_IMAGE_HEIGHT);

        VGint width = aWidth;

        VGint height = aHeight;

        vgCopyImage(aTargetImage, 0, 0, aSourceImage, 0, 0, width, height, VG_FALSE);

        }

    }

// this is supposed to be overloaded by child classes

void CHuiFxVg10ColorMatrixFilterBase::UpdateColorMatrix()

    {

    }