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/*
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* Copyright (c) 2008-2008 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: Implementation of the utility class for asynchronously decoding the header thumbnail image
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*
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*/
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#include "ccappimagedecoding.h"
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#include <bitmaptransforms.h>
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#include <Pbk2PresentationUtils.h>
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#include <imageconversion.h>
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namespace{
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const TInt KDelay = 500000; // 0.5s
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inline TSize ScaledLoadSize( const TSize& aOriginalSize, TInt aScaleFactor )
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{
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// Divide original size with scalefactor
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// Round always up if result is not integer
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return TSize( aOriginalSize.iWidth / aScaleFactor + ( aOriginalSize.iWidth % aScaleFactor ? 1 : 0 ),
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aOriginalSize.iHeight / aScaleFactor + ( aOriginalSize.iHeight % aScaleFactor ? 1 : 0 ) );
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}
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} // namespace
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// ---------------------------------------------------------------------------
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// Two-phase construction
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// ---------------------------------------------------------------------------
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//
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EXPORT_C CCCAppImageDecoding* CCCAppImageDecoding::NewL(
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MCCAppImageDecodingObserver& aObserver,
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RFs& aFs,
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HBufC8* aBitmapData,
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HBufC* aImageFile)
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{
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CCCAppImageDecoding* self = new (ELeave) CCCAppImageDecoding(
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aObserver, aFs, aBitmapData, aImageFile);
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CleanupStack::PushL(self);
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self->ConstructL();
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CleanupStack::Pop(self);
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self->iBitmapData = aBitmapData; // take ownship
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self->iImageFullName = aImageFile; // take ownship
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return self;
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}
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// ---------------------------------------------------------------------------
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// First phase (C++) constructor
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// ---------------------------------------------------------------------------
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//
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inline CCCAppImageDecoding::CCCAppImageDecoding(
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MCCAppImageDecodingObserver& aObserver,
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RFs& aFs,
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HBufC8* aBitmapData,
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HBufC* aImageFile) :
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CActive( CActive::EPriorityStandard ),
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iObserver(aObserver),
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iFs(aFs)
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{
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CActiveScheduler::Add(this);
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}
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// ---------------------------------------------------------------------------
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// Second phase (C++) constructor
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// ---------------------------------------------------------------------------
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//
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inline void CCCAppImageDecoding::ConstructL()
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{
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User::LeaveIfError( iTimer.CreateLocal() );
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}
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// ---------------------------------------------------------------------------
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// Destructor
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// ---------------------------------------------------------------------------
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//
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CCCAppImageDecoding::~CCCAppImageDecoding()
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{
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Cancel();
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if (iImgDecoder)
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{
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iImgDecoder->Cancel();
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delete iImgDecoder;
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}
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if (iBitmapScaler)
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{
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iBitmapScaler->Cancel();
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delete iBitmapScaler;
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}
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delete iBitmap;
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delete iBitmapData;
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delete iImageFullName;
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iTimer.Close();
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}
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// ---------------------------------------------------------------------------
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// Starts the decoding process
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// ---------------------------------------------------------------------------
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//
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EXPORT_C void CCCAppImageDecoding::StartL( const TSize& aImageSize )
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{
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Cancel();
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iDecoderState = ECcaConvertThumbnailImage;
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iBitmapSize = aImageSize;
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CreateBitmapL();
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}
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// ---------------------------------------------------------------------------
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// Called by the active object framework when the decoding (request) is
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// completed.
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// ---------------------------------------------------------------------------
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//
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void CCCAppImageDecoding::RunL()
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{
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User::LeaveIfError( iStatus.Int() );
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switch ( iDecoderState )
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{
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case ECcaConvertThumbnailImage:
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{
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iDecoderState = ECcaScaleThumbnail;
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CropBitmapL();
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ScaleBitmapL();
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break;
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}
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case ECcaScaleThumbnail:
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{
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if ( iImageFullName )
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{
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iDecoderState = ECcaReadImageFromFile;
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SetPriority( EPriorityIdle );
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iTimer.After( iStatus, KDelay );
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SetActive();
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}
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// don't break here
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}
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case ECcaScaleImage:
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{
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// Ownership of the bitmap is transferred
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iObserver.BitmapReadyL( iBitmap );
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iBitmap = NULL;
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delete iBitmapScaler;
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iBitmapScaler = NULL;
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delete iImgDecoder;
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iImgDecoder = NULL;
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break;
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}
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case ECcaReadImageFromFile:
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{
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if ( iImageFullName )
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{
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iDecoderState = ECcaConvertImageFromFile;
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CreateBitmapL();
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}
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break;
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}
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case ECcaConvertImageFromFile:
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{
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iDecoderState = ECcaScaleImage;
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SetPriority( EPriorityStandard );
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CropBitmapL();
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ScaleBitmapL();
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break;
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}
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default:
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break;
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}
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}
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// ---------------------------------------------------------------------------
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// Called when the decoding (request) is cancelled for some reason.
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// ---------------------------------------------------------------------------
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//
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void CCCAppImageDecoding::DoCancel()
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{
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if (iImgDecoder)
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{
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iImgDecoder->Cancel();
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delete iImgDecoder;
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iImgDecoder = NULL;
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}
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if ( iBitmapScaler )
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{
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iBitmapScaler->Cancel();
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delete iBitmapScaler;
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iBitmapScaler = NULL;
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}
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iTimer.Cancel();
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}
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void CCCAppImageDecoding::CropBitmapL()
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{
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TSize dummy;
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Pbk2PresentationImageUtils::CropImageL(
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*iBitmap,
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Pbk2PresentationImageUtils::ECropping,
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dummy );
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}
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void CCCAppImageDecoding::ScaleBitmapL()
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{
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iBitmapScaler = CBitmapScaler::NewL();
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iBitmapScaler->Scale( &iStatus, *iBitmap, iBitmapSize );
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SetActive();
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}
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void CCCAppImageDecoding::CreateBitmapL()
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{
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TInt initDecoder( KErrGeneral );
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if ( iDecoderState == ECcaConvertThumbnailImage && iBitmapData )
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{
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iImgDecoder = CImageDecoder::DataNewL( iFs, *iBitmapData, CImageDecoder::EOptionAlwaysThread );
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initDecoder = KErrNone;
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}
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else if ( iDecoderState == ECcaConvertImageFromFile && iImageFullName )
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{
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// leaaves if file doesn't exist
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TRAP ( initDecoder, iImgDecoder = CImageDecoder::FileNewL( iFs, *iImageFullName, CImageDecoder::EOptionAlwaysThread ) );
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}
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if ( initDecoder )
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{
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delete iBitmapScaler;
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iBitmapScaler = NULL;
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delete iImgDecoder;
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iImgDecoder = NULL;
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return;
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}
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if ( !iBitmap )
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{
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const TFrameInfo info = iImgDecoder->FrameInfo();
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// calculate size for the bitmap
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const TSize size( iBitmapSize );
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TSize loadSize( info.iOverallSizeInPixels );
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for( TInt i = 1 ; i < 9 ; i = i * 2 )
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{
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// we can use scalers 1:1 1:2 1:4 1:8
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TSize calcSize( ScaledLoadSize( info.iOverallSizeInPixels, i ) );
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if( calcSize.iHeight < size.iHeight ||
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calcSize.iWidth < size.iWidth )
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{
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break;
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}
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loadSize = calcSize;
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}
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iBitmap = new ( ELeave ) CFbsBitmap;
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User::LeaveIfError( iBitmap->Create( loadSize, info.iFrameDisplayMode ));
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}
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iStatus = KRequestPending;
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iImgDecoder->Convert( &iStatus, *iBitmap );
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SetActive();
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}
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