/*

* Copyright (c) 2004 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:    Image Transforms subsystem.

*

*/

#ifndef CVTIMAGESCALERIMPLWEIGHTEDAVERAGE_H

#define CVTIMAGESCALERIMPLWEIGHTEDAVERAGE_H

// INCLUDE FILES

#include "CVtImageScalerImpl.h"

// CLASS DECLARATIONS

/**

*  Weighted average scaler implementation.

*

*  @lib videosource.lib

*/

class CVtImageScalerImplWeightedAverage : public CVtImageScalerImpl

    {

    private: // from CVtImageScalerImpl

        /**

        * From CVtImageScalerImpl. Check CVtImageScalerImpl for description.

        */

        TInt Scale( TBool& aContinue );

    private: // methods

        /**

        * Validate given parameters.

        */

        void ValidateSourceTargetL(

            const CVtImage& aSource,

            CVtImage& aTarget );

        /**

        * Initializes internal variables for scaling.

        */

        void Initialize();

        /**

        * Scales images in displaymode EColor4K.

        */

        void Scale4K();

        /**

        * Scales images in displaymode EColor64K.

        */

        void Scale64K();

        /**

        * Scales images in displaymode EColor16M.

        */

        void Scale16M();

        /**

        * Scales images in displaymode EColor16MU.

        */

        void Scale16MU();

        /**

        * Scales images in displaymode EColor16MA.

        */

        void Scale16MA();

        /**

        * Fast scaling when target is double the source size for

        * 4K and 64K display modes.

        */

        void Scale2x4K64K( TUint32 aMask );

        /**

        * Fast scaling when target is double the source size for

        * 16M display mode.

        */

        void Scale2x16M();

        /**

        * Fast scaling when target is double the source size for

        * 16MU and 16MA display modes.

        */

        void Scale2x16MU16MA();

    private: // data

        // Target width ratio to source width

        TUint32 iU;

        // Target height ratio to source height

        TUint32 iV;

    };

#endif // CVTIMAGESCALERIMPLWEIGHTEDAVERAGE_H

// End of File