/*

* Copyright (c) 2010 Ixonos Plc.

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the "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:

* Ixonos Plc

*

* Description:  

*

*/

#include "CFilterSepia.h"

//  Sepia in RGB

const TInt rs = 112;

const TInt gs = 66;

const TInt bs = 20;

//  Helper variables

const TInt kr =   45808 * rs - 38446 * gs - 7362 * bs + 32768;

const TInt kg = - 19496 * rs + 26952 * gs - 3750 * bs + 32768;

const TInt kb = - 19608 * rs - 38184 * gs + 57792* bs + 32768;

EXPORT_C TInt CFilterSepia::Create()

	{

	CFilterSepia* ptr = NULL;

	TRAPD( error, ptr = NewL(); );

	if( error != KErrNone )

		{

		ptr = NULL;

		}

	return (TInt)((MImageFilter*)ptr);

	}

CFilterSepia* CFilterSepia::NewL()

	{

	CFilterSepia* self = new( ELeave )CFilterSepia();

	CleanupStack::PushL( self );

	self->ConstructL();

	CleanupStack::Pop( self );

	return self;

	}

CFilterSepia::~CFilterSepia()

	{

	}

CFilterSepia::CFilterSepia()

	{

	}

void CFilterSepia::ConstructL()

	{

	}

TRect CFilterSepia::Rect()

	{

	return iChild->Rect();

	}

TReal CFilterSepia::Scale()

	{

	return iChild->Scale();

	}

TSize CFilterSepia::ViewPortSize()

{

    return iChild->ViewPortSize();

}

TBlock * CFilterSepia::GetBlockL ( const TRect & aRect )

{

    TBlock * pB = iChild->GetBlockL (aRect);

    if (!pB) return NULL;

    TUint32 * pD = pB->iData;

    for (TInt i = 0; i < pB->iDataLength; ++i)

    {

        TUint32 c = *pD;

        //	Get RGB values

	    TInt b = c & 0xFF;

	    c >>= 8;

	    TInt g = c & 0xFF;

	    c >>= 8;

	    TInt r = c & 0xFF;

        TInt alpha = 19668 * r + 38442 * g + 7450 * b; 

        r = (alpha + kr) >> 16;

        if (r < 0) 

        {

            r = 0;

        }

        else if (r > 255) 

        {

            r = 255;

        }

        g = (alpha + kg) >> 16;

        if (g < 0) 

        {

            g = 0;

        }

        else if (g > 255) 

        {

            g = 255;

        }

        b = (alpha + kb) >> 16;

        if (b < 0) 

        {

            b = 0;

        }

        else if (b > 255) 

        {

            b = 255;

        }

        *pD++ = b | (g << 8) | (r << 16);

    }

    return pB;

}

void CFilterSepia::SetParent( MImageFilter* aParent )

	{

	iParent = aParent;

	}

void CFilterSepia::SetChild( MImageFilter* aChild )

	{

	iChild = aChild;

	}

TInt CFilterSepia::CmdL( const TDesC16& /*aCmd*/ )

	{

	return 0;

	}

const char* CFilterSepia::Type()

	{

	return "sepia";

	}

#if !defined(EKA2)

GLDEF_C TInt E32Dll( TDllReason )

    {

    return KErrNone;

    }	

#endif