1 /*

     2 * Copyright (c) 2006 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:  4 bits for alpha, red, green and blue component in a pixel.

    15 *

    16 */

    17 

    18 

    19 #ifndef TMID4444FORMAT_H

    20 #define TMID4444FORMAT_H

    21 

    22 //  INCLUDES

    23 #include "TMIDFormatConverter.h"

    24 

    25 //  CONSTANTS

    26 const TUint16 K4444AMax = 0xF000;

    27 const TUint16 K4444RMax = 0x0F00;

    28 const TUint16 K4444GMax = 0x00F0;

    29 const TUint16 K4444BMax = 0x000F;

    30 const TInt KBytesPerPixel4444 = 2;

    31 

    32 

    33 //  CLASS DEFINITION

    34 /**

    35  * 4 bits for alpha, red, green and blue component in a pixel, stored as a

    36  * short (0xARGB).

    37  *

    38  */

    39 

    40 NONSHARABLE_CLASS(TMID4444Format):  public TMIDFormatConverter

    41 {

    42 public: //  initialization

    43     void InitializeL(const TMIDBitmapParameters& aParameters);

    44 

    45 public: // from TMIDFormatConverter

    46     // Convert from internal to int

    47     TUint32 ConvertInternal(const TMIDInternalARGB& aInternal);

    48 

    49     // Convert from int to internal

    50     void Convert(TMIDInternalARGB& aResult, TUint32 aColor) const;

    51 

    52     // Get pixel from current position

    53     void GetPixel(TMIDInternalARGB& aResult) const;

    54 

    55     // Get alpha which is in same format as bitmap

    56     TUint8 GetAlpha() const;

    57 

    58     // Plot pixel to current position

    59     void PlotPixel(const TMIDInternalARGB& aInternal);

    60 

    61     // Checks is alpha calculation needed

    62     TBool IsAlpha()

    63     {

    64         return ETrue; /* always alpha */

    65     }

    66 

    67     // Set bitmap

    68     void SetBitmap(TUint32* aBitmap)

    69     {

    70         iBitmap = (TUint16*)aBitmap;

    71     }

    72 

    73     // Get bitmap

    74     TUint32* Bitmap()

    75     {

    76         return (TUint32*)iBitmap;

    77     }

    78 protected: // from TMIDFormatConverter

    79     // checks how many pixels is occupied and is last pixel in that limit

    80     TBool CheckSize(TInt aPixelSize, TInt aLastDrawnPixelOffset);

    81 

    82 private: // data

    83     TUint16* iBitmap;

    84 };

    85 

    86 #endif // TMID4444FORMAT_H