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 CVTIMAGESCALERIMPLWEIGHTEDAVERAGE_H

    22 #define CVTIMAGESCALERIMPLWEIGHTEDAVERAGE_H

    23 

    24 // INCLUDE FILES

    25 

    26 #include "CVtImageScalerImpl.h"

    27 

    28 // CLASS DECLARATIONS

    29 

    30 /**

    31 *  Weighted average scaler implementation.

    32 *

    33 *  @lib videosource.lib

    34 */

    35 class CVtImageScalerImplWeightedAverage : public CVtImageScalerImpl

    36     {

    37     private: // from CVtImageScalerImpl

    38 

    39         /**

    40         * From CVtImageScalerImpl. Check CVtImageScalerImpl for description.

    41         */

    42         TInt Scale( TBool& aContinue );

    43 

    44     private: // methods

    45 

    46         /**

    47         * Validate given parameters.

    48         */

    49         void ValidateSourceTargetL(

    50             const CVtImage& aSource,

    51             CVtImage& aTarget );

    52 

    53         /**

    54         * Initializes internal variables for scaling.

    55         */

    56         void Initialize();

    57 

    58         /**

    59         * Scales images in displaymode EColor4K.

    60         */

    61         void Scale4K();

    62 

    63         /**

    64         * Scales images in displaymode EColor64K.

    65         */

    66         void Scale64K();

    67 

    68         /**

    69         * Scales images in displaymode EColor16M.

    70         */

    71         void Scale16M();

    72 

    73         /**

    74         * Scales images in displaymode EColor16MU.

    75         */

    76         void Scale16MU();

    77 

    78         /**

    79         * Scales images in displaymode EColor16MA.

    80         */

    81         void Scale16MA();

    82 

    83         /**

    84         * Fast scaling when target is double the source size for

    85         * 4K and 64K display modes.

    86         */

    87         void Scale2x4K64K( TUint32 aMask );

    88 

    89         /**

    90         * Fast scaling when target is double the source size for

    91         * 16M display mode.

    92         */

    93         void Scale2x16M();

    94 

    95         /**

    96         * Fast scaling when target is double the source size for

    97         * 16MU and 16MA display modes.

    98         */

    99         void Scale2x16MU16MA();

   100 

   101     private: // data

   102 

   103         // Target width ratio to source width

   104         TUint32 iU;

   105 

   106         // Target height ratio to source height

   107         TUint32 iV;

   108 

   109     };

   110 

   111 #endif // CVTIMAGESCALERIMPLWEIGHTEDAVERAGE_H

   112 

   113 // End of File

   114 

   115