1 /*

     2 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:   

    15 *

    16 */

    17 

    18 

    19 

    20 #ifndef HUIFXVG10FILTERBASE_H_

    21 #define HUIFXVG10FILTERBASE_H_

    22 

    23 #include "HuiFxFilter.h"

    24 #include "HuiFxVg10RenderbufferBase.h"

    25 #include "HuiFxVg10.h"

    26 #include <e32math.h>

    27 

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

    29 // EPSILON it's considered zero.

    30 const float EPSILON = 0.001;

    31 

    32 

    33 class CHuiFxVg10FilterBase: public CHuiFxFilter

    34     {

    35 public: // from CHuiFxFilter

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

    37             CHuiFxRenderbuffer& aTarget, CHuiFxRenderbuffer& aSource,

    38             const TRect& aTargetRect, const TRect& aSourceRect);

    39 

    40 private:

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

    42 protected:

    43     TBool wasEnoughMemory();

    44     

    45     template <class T>

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

    47     };

    48  

    49 

    50 #endif /*HUIFXVG10FILTERBASE_H_*/