--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/uiservicetab/vimpstdetailsviewplugin/src/cvimpstdetailsimagedecoder.cpp Wed Sep 01 12:33:36 2010 +0100
@@ -0,0 +1,180 @@
+/*
+* Copyright (c) 2008 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: Utility class for asynchronously decoding the header thumbnail image
+ *
+*/
+
+
+#include "cvimpstdetailsimagedecoder.h"
+
+#include "cvimpstdetailsheadercontrol.h"
+
+#include <cbsbitmap.h>
+#include <imageconversion.h>
+#include <bitmaptransforms.h>
+
+// ---------------------------------------------------------------------------
+// CVIMPSTDetailsImageDecoder::NewL
+// Two-phase construction
+// ---------------------------------------------------------------------------
+//
+CVIMPSTDetailsImageDecoder* CVIMPSTDetailsImageDecoder::NewL(CVIMPSTDetailsHeaderControl& aHeader, const TDesC8& aBitmapData)
+ {
+ CVIMPSTDetailsImageDecoder* self = new (ELeave) CVIMPSTDetailsImageDecoder(aHeader);
+ CleanupStack::PushL(self);
+ self->ConstructL(aBitmapData);
+ CleanupStack::Pop(self);
+ return self;
+ }
+
+// ---------------------------------------------------------------------------
+// CVIMPSTDetailsImageDecoder::CVIMPSTDetailsImageDecoder
+// First phase (C++) constructor
+// ---------------------------------------------------------------------------
+//
+CVIMPSTDetailsImageDecoder::CVIMPSTDetailsImageDecoder(CVIMPSTDetailsHeaderControl& aHeader) :
+ CActive( CActive::EPriorityStandard ), iHeader(aHeader)
+ {
+ CActiveScheduler::Add(this);
+ }
+
+// ---------------------------------------------------------------------------
+// CVIMPSTDetailsImageDecoder::ConstructL
+// ConstructL, second phase constructor
+// ---------------------------------------------------------------------------
+//
+void CVIMPSTDetailsImageDecoder::ConstructL(const TDesC8& aBitmapData)
+ {
+ iBitmapData = aBitmapData.AllocL();
+ User::LeaveIfError( iFs.Connect() );
+ }
+
+// ---------------------------------------------------------------------------
+// CVIMPSTDetailsImageDecoder::~CVIMPSTDetailsImageDecoder
+// ---------------------------------------------------------------------------
+//
+CVIMPSTDetailsImageDecoder::~CVIMPSTDetailsImageDecoder()
+ {
+ DoCancel();
+ if (iImgDecoder)
+ {
+ delete iImgDecoder;
+ iImgDecoder = NULL;
+ }
+ if (iBitmap)
+ {
+ delete iBitmap;
+ iBitmap = NULL;
+ }
+ if (iBitmapData)
+ {
+ delete iBitmapData;
+ iBitmapData = NULL;
+ }
+ if (iBitmapScaler)
+ {
+ delete iBitmapScaler;
+ iBitmapScaler = NULL;
+ }
+
+ iFs.Close();
+ }
+
+// ---------------------------------------------------------------------------
+// CVIMPSTDetailsImageDecoder::Start
+// Starts the decoding process
+// ---------------------------------------------------------------------------
+//
+void CVIMPSTDetailsImageDecoder::StartL(TSize aBitmapSize)
+ {
+ iDecoderState = ECcaConvertThumbnailImage;
+ iBitmapSize = aBitmapSize;
+ CreateBitmapL();
+ }
+
+// ---------------------------------------------------------------------------
+// CVIMPSTDetailsImageDecoder::RunL
+// Called by the active object framework when the decoding (request) is
+// completed.
+// ---------------------------------------------------------------------------
+//
+void CVIMPSTDetailsImageDecoder::RunL()
+ {
+ User::LeaveIfError( iStatus.Int() );
+ switch ( iDecoderState )
+ {
+ case ECcaConvertThumbnailImage:
+ {
+ iDecoderState = ECcaScaleThumbnail;
+ ScaleBitmapL();
+ break;
+ }
+ case ECcaScaleThumbnail:
+ {
+ // don't delete
+ // Ownership of the bitmap is transferred
+ iHeader.SetBitmap(iBitmap, NULL );
+ iBitmap = NULL;
+ }
+ default:
+ break;
+ }
+
+ }
+
+// ---------------------------------------------------------------------------
+// CVIMPSTDetailsImageDecoder::DoCancel
+// Called when the decoding (request) is cancelled for some reason.
+// ---------------------------------------------------------------------------
+//
+void CVIMPSTDetailsImageDecoder::DoCancel()
+ {
+ iImgDecoder->Cancel();
+ }
+
+// ---------------------------------------------------------------------------
+// CVIMPSTDetailsImageDecoder::ScaleBitmapL
+// scaling it to fit to the screen
+// ---------------------------------------------------------------------------
+//
+void CVIMPSTDetailsImageDecoder::ScaleBitmapL()
+ {
+ iBitmapScaler = CBitmapScaler::NewL();
+ iBitmapScaler->Scale( &iStatus, *iBitmap, iBitmapSize );
+ SetActive();
+ }
+
+// ---------------------------------------------------------------------------
+// CVIMPSTDetailsImageDecoder::CreateBitmapL
+// creates the bitmap
+// ---------------------------------------------------------------------------
+//
+
+void CVIMPSTDetailsImageDecoder::CreateBitmapL()
+ {
+ if ( iDecoderState == ECcaConvertThumbnailImage )
+ {
+ iImgDecoder = CImageDecoder::DataNewL( iFs, *iBitmapData, CImageDecoder::EOptionAlwaysThread );
+ }
+ if ( !iBitmap )
+ {
+ TFrameInfo info = iImgDecoder->FrameInfo();
+ iBitmap = new ( ELeave ) CFbsBitmap;
+ User::LeaveIfError( iBitmap->Create( info.iOverallSizeInPixels, info.iFrameDisplayMode ));
+ }
+ iStatus = KRequestPending;
+ iImgDecoder->Convert( &iStatus, *iBitmap );
+ SetActive();
+ }
+// end of file