/*

* 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 CVTIMAGEROTATORIMPLCLOCKWISE_H

#define CVTIMAGEROTATORIMPLCLOCKWISE_H

// INCLUDE FILES

#include "CVtImageRotatorImpl.h"

// FORWARD DECLARATIONS

class CVtImage;

// CLASS DECLARATIONS

/**

*  Image scaler implementation.

*

*  @lib videosource.lib

*/

class CVtImageRotatorImplClockwise : public CVtImageRotatorImpl

    {

    public:

        /**

        * C++ constructor

        * @param "aAngle" Selected rotation angle.

        */

        CVtImageRotatorImplClockwise( const CVtImageRotator::TRotationAngle& aAngle );

        /**

        * Rotates the image.

        * @param "aContinue" When method returns, this parameter will contain

        * ETrue if new call is needed (i.e. scaling is not yet finished) or

        * EFalse if scaling is complete.

        * @return KErrNone or one of the system wide error codes.

        */

        TInt Rotate( TBool& aContinue );

        /**

        * Source and target image validation method.

        * @param "aSource" Constant reference to source image.

        * @param "aTarget" Constant reference to target image.

        * @exception If source or target is not valid, this method leaves

        * with KErrNotSupported.

        */

        void ValidateSourceTargetL( 

            const CVtImage& aSource, 

            CVtImage& aTarget );

        /**

        * Method for checking specific rotation angle support.

        * @param "aAngle" Rotation type that will be needed.

        * @return ETrue if aAngle is one of the supported rotation types

        * EFalse otherwise.

        */

        TBool SupportsRotationAngle( const CVtImageRotator::TRotationAngle& aAngle );

    private:

        /**

        * The rotation implementation.

        */

        void DoRotate();

        /**

        * The rotation implementation for YUV planes.

        * @param "aSource" Constant pointer to source plane.

        * @param "aTarget" Pointer to target plane.

        * @param "aWidth" Width of the plane in pixels.

        * @param "aHeight" Height of the plane in pixels.

        * @param "aBytesPerRow" Bytes per row in plane.

        */

        void RotatePlane( 

            const TUint8* aSource, 

            TUint8* aTarget, 

            TInt aSourceWidth, 

            TInt aSourceHeight, 

            TInt aSourceBytesPerRow,

            TInt aTargetHeight,

            TInt aTargetBytesPerRow );

    };

#endif // CVTIMAGEROTATORIMPLCLOCKWISE_H

// End of File