/*

* 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:   

*

*/

#ifndef HUIFXVG10FILTERBASE_H_

#define HUIFXVG10FILTERBASE_H_

#include "HuiFxFilter.h"

#include "HuiFxVg10RenderbufferBase.h"

#include "HuiFxVg10.h"

#include <e32math.h>

// when comparing floating point numbers against zero, if the number is below

// EPSILON it's considered zero.

const float EPSILON = 0.001;

class CHuiFxVg10FilterBase: public CHuiFxFilter

    {

public: // from CHuiFxFilter

    virtual TBool Draw(CHuiFxEngine& aEngine, CHuiGc& aGc,

            CHuiFxRenderbuffer& aTarget, CHuiFxRenderbuffer& aSource,

            const TRect& aTargetRect, const TRect& aSourceRect);

private:

    virtual void DrawEffect(CHuiFxEngine& aEngine, VGImage aTargetImage, VGImage aSourceImage, TInt aWidth, TInt aHeight) = 0;

protected:

    TBool wasEnoughMemory();

    template <class T>

    inline T clamp(const T value, const T minimum, const T maximum) {return (Max(Min(maximum, value), minimum));}

    };

#endif /*HUIFXVG10FILTERBASE_H_*/