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:   8 bits for alpha, red, green and blue component in a pixel.

    15 *

    16 */

    17 

    18 

    19 #ifndef TMID8888FORMAT_H

    20 #define TMID8888FORMAT_H

    21 

    22 //  INCLUDES

    23 #include "TMIDFormatConverter.h"

    24 

    25 //  CONSTANTS

    26 const TUint32 K8888AMax = 0xFF000000;

    27 const TUint32 K8888RMax = 0x00FF0000;

    28 const TUint32 K8888GMax = 0x0000FF00;

    29 const TUint32 K8888BMax = 0x000000FF;

    30 const TInt KBytesPerPixel8888 = 4;

    31 

    32 

    33 //  CLASS DEFINITION

    34 /**

    35  * 8 bits for alpha, red, green and blue component in a pixel (0xAARRGGBB).

    36  *

    37  * note that this class does not use external alpha bitmap, use

    38  * TMID888AFormat for that.

    39  *

    40  */

    41 

    42 NONSHARABLE_CLASS(TMID8888Format):  public TMIDFormatConverter

    43 {

    44 public: //  initialization

    45     void InitializeL(const TMIDBitmapParameters& aParameters);

    46 

    47 public: // from TMIDFormatConverter

    48     // Convert from internal to int

    49     TUint32 ConvertInternal(const TMIDInternalARGB& aInternal);

    50 

    51     // Convert from int to internal

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

    53 

    54     // Get pixel from current position

    55     void GetPixel(TMIDInternalARGB& aResult) const;

    56 

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

    58     TUint8 GetAlpha() const;

    59 

    60     // Get pixel with alpha values

    61     void GetPixelWithAlpha(TMIDInternalARGB& aResult) const;

    62 

    63     // Plot pixel to current position

    64     void PlotPixel(const TMIDInternalARGB& aInternal);

    65 

    66     // Checks is alpha calculation needed

    67     TBool IsAlpha()

    68     {

    69         return ETrue; /* always alpha */

    70     }

    71 

    72     // Set bitmap

    73     void SetBitmap(TUint32* aBitmap)

    74     {

    75         iBitmap = aBitmap;

    76     }

    77 

    78     // Get bitmap

    79     TUint32* Bitmap()

    80     {

    81         return iBitmap;

    82     }

    83 

    84 protected: // from TMIDFormatConverter

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

    86     TBool CheckSize(TInt aPixelSize, TInt aLastDrawnPixelOffset);

    87 

    88 private: // data

    89     TUint32* iBitmap;

    90 };

    91 

    92 #endif // TMID8888FORMAT_H