/*
* Copyright (c) 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: Camera Bitmap Scaler class and observer interface.
*
*/
#ifndef CAM_BITMAPSCALER_H
#define CAM_BITMAPSCALER_H
// ===========================================================================
// Included headers
#include <e32std.h>
#include <f32file.h>
// ===========================================================================
// Forward declarations
class CFbsBitmap;
class CBitmapScaler;
// ===========================================================================
// Classes
/**
* Interface for Camera Bitmap Scaler Observers
*/
class MCamBitmapScalerObserver
{
public:
/**
* Notify observer that the bitmap scaling has finished.
* @param aStatus Status code describing the success of the operation.
* KErrNone if all went as planned.
* @param aBitmap Scaled bitmap. NULL if errors in scaling.
*/
virtual void BitmapScaled( TInt aStatus, const CFbsBitmap* aBitmap ) = 0;
};
/**
* Image Decoder class
*/
class CCamBitmapScaler : public CActive
{
// =======================================================
public:
/**
* 2-phase constructor.
*/
static CCamBitmapScaler* NewL( MCamBitmapScalerObserver& aObserver );
/**
* Destructor.
*/
virtual ~CCamBitmapScaler();
// -------------------------------------------------------
// From CActive
protected:
/**
* Called when Cancel is requested and this AO is active.
* @see CActive
*/
virtual void DoCancel();
/**
* We get notified of the scaling success by a call to RunL
* when scaling finishes.
* @see CActive
*/
virtual void RunL();
/**
* If a leave occurs in RunL, RunError gets called by the
* Active Scheduler.
* @param aError Leave code from RunL.
* @see CActive
*/
virtual TInt RunError( TInt aError );
// -------------------------------------------------------
public:
void InitScalingL( const TSize& aTargetSize,
const TDisplayMode& aTargetDisplayMode,
TBool aMaintainAspect );
void StartScaling( CFbsBitmap& aSourceBitmap );
private:
/**
* 2nd phase constructor.
*/
void ConstructL();
/**
* 1st phase constructor.
* Cannot leave.
*/
CCamBitmapScaler( MCamBitmapScalerObserver& aObserver );
// =======================================================
// Data
private:
MCamBitmapScalerObserver& iObserver;
CBitmapScaler* iScaler;
CFbsBitmap* iScaledBitmap;
TBool iMaintainAspect;
// =======================================================
};
// ===========================================================================
#endif // CAM_BITMAPSCALER_H
// end of file