/*

* Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  4 bits for alpha, red, green and blue component in a pixel.

*

*/

//  INCLUDE FILES

#include "TMID4444Format.h"

inline TUint16 ConvertInternalInline4444(const TMIDInternalARGB& aInternal)

{

    return (TUint16)(((aInternal.iA & KFourLeftBits) << KMIDShift8Bits) |

                     ((aInternal.iR & KFourLeftBits) << KMIDShift4Bits) |

                     ((aInternal.iG & KFourLeftBits)) |

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

}

inline void ConvertInline4444(TMIDInternalARGB& aResult, TUint32 aColor, TBool aTransparency)

{

    // set alpha only if bitmap is transparent, otherwise use full opaque

    aResult.iA = aTransparency

                 ? KNativeColors[(aColor & K4444AMax) >> KMIDShift12Bits ]

                 : KAlphaFullOpaque;

    aResult.iR = KNativeColors[(aColor & K4444RMax) >> KMIDShift8Bits ];

    aResult.iG = KNativeColors[(aColor & K4444GMax) >> KMIDShift4Bits ];

    aResult.iB = KNativeColors[(aColor & K4444BMax)];

}

void TMID4444Format::InitializeL(const TMIDBitmapParameters& aParameters)

{

    TMIDFormatConverter::InitializeL(aParameters);

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

    iBitmap = (TUint16*)aParameters.iPixels;

}

TUint32 TMID4444Format::ConvertInternal(const TMIDInternalARGB& aInternal)

{

    return ConvertInternalInline4444(aInternal);

}

void TMID4444Format::Convert(TMIDInternalARGB& aResult, TUint32 aColor) const

{

    ConvertInline4444(aResult, aColor, iTransparency);

}

void TMID4444Format::GetPixel(TMIDInternalARGB& aResult) const

{

    ConvertInline4444(aResult, iBitmap[ iOffset ], iTransparency);    // CSI: 2 Wrong index means implementation error #

}

TUint8 TMID4444Format::GetAlpha() const

{

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

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

}

void TMID4444Format::PlotPixel(const TMIDInternalARGB& aInternal)

{

    iBitmap[ iOffset ] = ConvertInternalInline4444(aInternal);    // CSI: 2 Wrong index means implementation error #

}

TBool TMID4444Format::CheckSize(TInt aPixelSize, TInt aLastDrawnPixelOffset)

{

    // returns is there enough space

    return ((aLastDrawnPixelOffset * KBytesPerPixel4444) <= aPixelSize);

}