/*

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

*

*/

//  INCLUDE FILES

#include "TMID8888Format.h"

// CONSTANTS

const TInt KMIDAlphaShift = 24;

const TInt KMIDRedShift   = 16;

const TInt KMIDGreenShift =  8;

inline TUint32 ConvertInternalInline8888(const TMIDInternalARGB& aInternal)

{

    return ((aInternal.iA << KMIDAlphaShift) & K8888AMax) |

           ((aInternal.iR << KMIDRedShift) & K8888RMax) |

           ((aInternal.iG << KMIDGreenShift) & K8888GMax) |

           ((aInternal.iB) & K8888BMax);

}

inline void ConvertInline8888(TMIDInternalARGB& aResult, TUint32 aColor, TBool aTransparency)

{

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

    aResult.iA = aTransparency

                 ? (TUint8)((aColor & K8888AMax) >> KMIDAlphaShift)

                 : KAlphaFullOpaque;

    aResult.iR = (TUint8)((aColor & K8888RMax) >> KMIDRedShift);

    aResult.iG = (TUint8)((aColor & K8888GMax) >> KMIDGreenShift);

    aResult.iB = (TUint8)(aColor & K8888BMax);

}

void TMID8888Format::InitializeL(const TMIDBitmapParameters& aParameters)

{

    TMIDFormatConverter::InitializeL(aParameters);

    __ASSERT_DEBUG(!iAlphaBitmap, User::Invariant());

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

    iBitmap = aParameters.iPixels;

}

TUint32 TMID8888Format::ConvertInternal(const TMIDInternalARGB& aInternal)

{

    return ConvertInternalInline8888(aInternal);

}

void TMID8888Format::Convert(TMIDInternalARGB& aResult, TUint32 aColor) const

{

    ConvertInline8888(aResult, aColor, iTransparency);

}

void TMID8888Format::GetPixel(TMIDInternalARGB& aResult) const

{

    ConvertInline8888(aResult, iBitmap[ iOffset ], iTransparency);    // CSI: 2 Wrong index means implementation error #

}

void TMID8888Format::PlotPixel(const TMIDInternalARGB& aInternal)

{

    iBitmap[ iOffset ] = ConvertInternalInline8888(aInternal);    // CSI: 2 Wrong index means implementation error #

}

TUint8 TMID8888Format::GetAlpha() const

{

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

    __ASSERT_DEBUG(!iAlphaBitmap, User::Invariant());

    return (TUint8)(iBitmap[ iOffset ] >> KMIDAlphaShift);    // CSI: 2 Wrong index means implementation error #

}

void TMID8888Format::GetPixelWithAlpha(TMIDInternalARGB& aResult) const

{

    __ASSERT_DEBUG(!iAlphaBitmap, User::Invariant());

    GetPixel(aResult);

}

TBool TMID8888Format::CheckSize(TInt aPixelSize, TInt aLastDrawnPixelOffset)

{

    return ((aLastDrawnPixelOffset * KBytesPerPixel8888) <= aPixelSize);

}