/*

* 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 <e32math.h>

#include "CFilterBrightness.h"

const TInt KBrightnessScale = 80;

EXPORT_C TInt CFilterBrightness::Create()

	{

	CFilterBrightness* ptr = NULL;

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

	if( error != KErrNone )

		{

		ptr = NULL;

		}

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

	}

CFilterBrightness* CFilterBrightness::NewL()

	{

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

	CleanupStack::PushL( self );

	self->ConstructL();

	CleanupStack::Pop( self );

	return self;

	}

CFilterBrightness::~CFilterBrightness()

	{

	}

CFilterBrightness::CFilterBrightness()

	{

	}

void CFilterBrightness::ConstructL()

	{

	}

TRect CFilterBrightness::Rect()

	{

	return iChild->Rect();

	}

TReal CFilterBrightness::Scale()

	{

    return iChild->Scale();

	}

TSize CFilterBrightness::ViewPortSize()

{

    return iChild->ViewPortSize();

}

TBlock * CFilterBrightness::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;

        TInt r = c & 0xFF0000;

        r += iAdjR;

        if (r > 0xFF0000)

        {

            r = 0xFF0000;

        }

        else if (r < 0)

        {

            r = 0;

        }

        TInt g = c & 0xFF00;

        g += iAdjG;

        if (g > 0xFF00)

        {

            g = 0xFF00;

        }

        else if (g < 0)

        {

            g = 0;

        }

        TInt b = c & 0xFF;

        b += iAdjB;

        if (b > 0xFF)

        {

            b = 0xFF;

        }

        if (b < 0)

        {

            b = 0;

        }

        *pD++ = 0 | r | g | b;

    }

    return pB;

}

void CFilterBrightness::SetParent( MImageFilter* aParent )

	{

	iParent = aParent;

	}

void CFilterBrightness::SetChild( MImageFilter* aChild )

	{

	iChild = aChild;

	}

TInt CFilterBrightness::CmdL( const TDesC16& aCmd )

{

	TLex lex (aCmd);

    //  Get brightness parameter [-100,100]

	while ( ! lex.Eos() )

    {

		TPtrC token = lex.NextToken();

        if ( token.Compare( _L("brightness") ) == 0)

        {

            TInt bpar = 0;

			lex.Inc();

			lex.Val (bpar);

	        if (bpar < - 100)

	        {

		        bpar = -100;

	        }

	        else if (bpar > 100)

	        {

		        bpar = 100;

	        }

            iBrightness = ((bpar * KBrightnessScale) / 100);

            iAdjR = iBrightness << 16;

            iAdjG = iBrightness << 8;

            iAdjB = iBrightness;

		}

    }

    return 0;

}

const char* CFilterBrightness::Type()

	{

	return "brightness";

	}

#if !defined(EKA2)

GLDEF_C TInt E32Dll( TDllReason )

    {

    return KErrNone;

    }	

#endif