1 /*

     2 * Copyright (c) 2006-2007 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 red, green and blue component in a pixel.

    15 *

    16 */

    17 

    18 

    19 //  INCLUDE FILES

    20 #include "TMID444Format.h"

    21 

    22 

    23 inline TUint16 ConvertInternalInline444(const TMIDInternalARGB& aInternal)

    24 {

    25     // no transparency, so alpha is 0

    26     return (TUint16)(((aInternal.iR & KFourLeftBits) << KMIDShift4Bits) +

    27                      (aInternal.iG & KFourLeftBits) +

    28                      ((aInternal.iB & KFourLeftBits) >> KMIDShift4Bits));

    29 }

    30 

    31 inline void ConvertInline444(TMIDInternalARGB& aResult, TUint32 aColor)

    32 {

    33     aResult.iA = KAlphaFullOpaque;

    34     aResult.iR = KNativeColors[(aColor & K444RMax) >> KMIDShift8Bits ];

    35     aResult.iG = KNativeColors[(aColor & K444GMax) >> KMIDShift4Bits ];

    36     aResult.iB = KNativeColors[(aColor & K444BMax)];

    37 }

    38 

    39 void TMID444Format::InitializeL(const TMIDBitmapParameters& aParameters)

    40 {

    41     TMIDFormatConverter::InitializeL(aParameters);

    42     iOffset += iTransformer.iPoint.iX + iTransformer.iPoint.iY * iScanlength;

    43     iBitmap = (TUint16*)aParameters.iPixels;

    44 }

    45 

    46 TUint32 TMID444Format::ConvertInternal(const TMIDInternalARGB& aInternal)

    47 {

    48     return ConvertInternalInline444(aInternal);

    49 }

    50 

    51 void TMID444Format::Convert(TMIDInternalARGB& aResult, TUint32 aColor) const

    52 {

    53     ConvertInline444(aResult, aColor);

    54 }

    55 

    56 void TMID444Format::GetPixel(TMIDInternalARGB& aResult) const

    57 {

    58     ConvertInline444(aResult, iBitmap[ iOffset ]);    // CSI: 2 Wrong index means implementation error #

    59 }

    60 

    61 TUint8 TMID444Format::GetAlpha() const

    62 {

    63     // we need only last 8 bits since it is either white or black

    64     return (TUint8)(((TUint16*)iAlphaBitmap)[ iOffset ] & KMIDEightRightBits);   // CSI: 2 Wrong index means implementation error #

    65 }

    66 

    67 void TMID444Format::PlotPixel(const TMIDInternalARGB& aInternal)

    68 {

    69     iBitmap[ iOffset ] = ConvertInternalInline444(aInternal);    // CSI: 2 Wrong index means implementation error #

    70 }

    71 

    72 

    73 TBool TMID444Format::CheckSize(TInt aPixelSize, TInt aLastDrawnPixelOffset)

    74 {

    75     return((aLastDrawnPixelOffset * KBytesInPixel444) <= aPixelSize);

    76 }

    77