1 /*

     2 * Copyright (c) 2004 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:    Image Transforms subsystem.

    15 *

    16 */

    17 

    18 

    19 

    20 

    21 #ifndef CVTIMAGEROTATORIMPLCLOCKWISE_H

    22 #define CVTIMAGEROTATORIMPLCLOCKWISE_H

    23 

    24 // INCLUDE FILES

    25 

    26 #include "CVtImageRotatorImpl.h"

    27 

    28 // FORWARD DECLARATIONS

    29 

    30 class CVtImage;

    31 

    32 // CLASS DECLARATIONS

    33 

    34 /**

    35 *  Image scaler implementation.

    36 *

    37 *  @lib videosource.lib

    38 */

    39 class CVtImageRotatorImplClockwise : public CVtImageRotatorImpl

    40     {

    41     public:

    42         /**

    43         * C++ constructor

    44         * @param "aAngle" Selected rotation angle.

    45         */

    46         CVtImageRotatorImplClockwise( const CVtImageRotator::TRotationAngle& aAngle );

    47         

    48         /**

    49         * Rotates the image.

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

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

    52         * EFalse if scaling is complete.

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

    54         */

    55         TInt Rotate( TBool& aContinue );

    56 

    57         /**

    58         * Source and target image validation method.

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

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

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

    62         * with KErrNotSupported.

    63         */

    64         void ValidateSourceTargetL( 

    65             const CVtImage& aSource, 

    66             CVtImage& aTarget );

    67 

    68         /**

    69         * Method for checking specific rotation angle support.

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

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

    72         * EFalse otherwise.

    73         */

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

    75 

    76     private:

    77 

    78         /**

    79         * The rotation implementation.

    80         */

    81         void DoRotate();

    82     

    83         /**

    84         * The rotation implementation for YUV planes.

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

    86         * @param "aTarget" Pointer to target plane.

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

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

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

    90         */

    91         void RotatePlane( 

    92             const TUint8* aSource, 

    93             TUint8* aTarget, 

    94             TInt aSourceWidth, 

    95             TInt aSourceHeight, 

    96             TInt aSourceBytesPerRow,

    97             TInt aTargetHeight,

    98             TInt aTargetBytesPerRow );

    99     };

   100 

   101 #endif // CVTIMAGEROTATORIMPLCLOCKWISE_H

   102             

   103 // End of File

   104 

   105