/*

* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:  

*

*/

// INCLUDE FILES

#include "minimapscaler.h"

#include <fbs.h>

#include <BitmapTransforms.h>

// EXTERNAL DATA STRUCTURES

// EXTERNAL FUNCTION PROTOTYPES  

// CONSTANTS

// MACROS

// LOCAL CONSTANTS AND MACROS

// MODULE DATA STRUCTURES

// LOCAL FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// ============================= LOCAL FUNCTIONS ===============================

// ============================ MEMBER FUNCTIONS ===============================

// -----------------------------------------------------------------------------

// CMinimapScaler::CMinimapScaler

// C++ default constructor can NOT contain any code, that

// might leave.

// -----------------------------------------------------------------------------

//

CMinimapScaler::CMinimapScaler(MMinimapScalerCallback& aCallback)

    : CActive(CActive::EPriorityIdle-1), iCallback(&aCallback)

    {

    CActiveScheduler::Add(this);

    }

// -----------------------------------------------------------------------------

// CMinimapScaler::ConstructL

// Symbian 2nd phase constructor can leave.

// -----------------------------------------------------------------------------

//

void CMinimapScaler::ConstructL()

    {

    iScaler = CBitmapScaler::NewL();

    }

// -----------------------------------------------------------------------------

// CMinimapScaler::NewL

// Two-phased constructor.

// -----------------------------------------------------------------------------

//

CMinimapScaler* CMinimapScaler::NewL(MMinimapScalerCallback& aCallback)

    {

    CMinimapScaler* self = new( ELeave ) CMinimapScaler(aCallback);

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop();

    return self;

    }

// Destructor

CMinimapScaler::~CMinimapScaler()

    {       

    Cancel();

    delete iScaler;

    delete iResultBitmap;

    }

// -----------------------------------------------------------------------------

// CMinimapScaler::StartScalingL

// 

// 

// -----------------------------------------------------------------------------

//

void CMinimapScaler::StartScalingL(CFbsBitmap& aSource, const TRect& aTargetRect)

    {

    // cancel outstanding request

    Cancel();

    if (!iResultBitmap || iResultBitmap->SizeInPixels() != aTargetRect.Size())

        {        

        DeleteResultBitmap();

        // create target bitmap

        iResultBitmap = new (ELeave) CFbsBitmap();

        User::LeaveIfError(iResultBitmap->Create(aTargetRect.Size(),aSource.DisplayMode()));              

        }   

    // start scaling, async        

    iTargetRect = aTargetRect;

    iScaler->Scale(&iStatus, aSource, *iResultBitmap, EFalse);

    SetActive();     

    }    

// -----------------------------------------------------------------------------

// CMinimap::DeleteResultBitmap

// 

// 

// -----------------------------------------------------------------------------

//

void CMinimapScaler::DeleteResultBitmap()

    {

    delete iResultBitmap;    

    iResultBitmap = 0;

    }

// -----------------------------------------------------------------------------

// CMinimap::DoCancel

// 

// 

// -----------------------------------------------------------------------------

//

void CMinimapScaler::DoCancel()

    {

    iScaler->Cancel();

    DeleteResultBitmap();

    }

// -----------------------------------------------------------------------------

// CMinimap::RunL

// 

// 

// -----------------------------------------------------------------------------

//

void CMinimapScaler::RunL()

    {

    iCallback->ScalingCompletedL(*iResultBitmap, iTargetRect);

    // if the callback called StartScalingL(), we must not delete the bitmap

    if (!IsActive())

        {

        DeleteResultBitmap();

        }

    }    

// ========================== OTHER EXPORTED FUNCTIONS =========================

//  End of File