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 

    22 #ifndef CVTIMAGESCALERIMPLBILINEAR_H

    23 #define CVTIMAGESCALERIMPLBILINEAR_H

    24 

    25 // INCLUDE FILES

    26 

    27 #include "CVtImageScalerImpl.h"

    28 

    29 // CLASS DECLARATIONS

    30 

    31 /**

    32 *  Bilinear image scaler implementation.

    33 *

    34 *  @lib videosource.lib

    35 */

    36 class CVtImageScalerImplBilinear : public CVtImageScalerImpl

    37     {

    38     private: // from CVtImageScalerImpl

    39 

    40         /**

    41         * From CVtImageScalerImpl. Check CVtImageScalerImpl for description.

    42         */

    43         TInt Scale( TBool& aContinue );

    44 

    45     private:

    46 

    47         /**

    48         * Validate given parameters.

    49         */

    50         void ValidateSourceTargetL(

    51             const CVtImage& aSource,

    52             CVtImage& aTarget );

    53 

    54         /**

    55         * Initializes internal variables for scaling.

    56         */

    57         void Initialize();

    58 

    59         /**

    60         * Scales images in displaymode EColor4K.

    61         */

    62         void Scale4K();

    63 

    64         /**

    65         * Scales images in displaymode EColor64K.

    66         */

    67         void Scale64K();

    68 

    69         /**

    70         * Scales images in displaymode EColor16M.

    71         */

    72         void Scale16M();

    73 

    74         /**

    75         * Scales images in displaymode EColor16MU.

    76         */

    77         void Scale16MU();

    78 

    79         /**

    80         * Scales images in displaymode EColor16MA.

    81         */

    82         void Scale16MA();

    83 

    84         /**

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

    86         * 4K and 64K display modes.

    87         */

    88         void Scale2x4K64K( TUint32 aMask );

    89 

    90         /**

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

    92         * 16M display mode.

    93         */

    94         void Scale2x16M();

    95 

    96         /**

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

    98         * 16MU and 16MA display modes.

    99         */

   100         void Scale2x16MU16MA();

   101 

   102     private:

   103 

   104         // Target width ratio to source width

   105         TUint32 iU;

   106 

   107         // Target height ratio to source height

   108         TUint32 iV;

   109     };

   110 

   111 #endif // CVTIMAGESCALERIMPLBILINEAR_H

   112 

   113 // End of File

   114 

   115