author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 19 Feb 2010 22:40:27 +0200 | |
branch | RCL_3 |
changeset 3 | 04ab22b956c2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2010 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: Utility class for asynchronously decoding the header thumbnail image |
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* |
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*/ |
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#ifndef CCAPPIMAGEDECODING_H_ |
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#define CCAPPIMAGEDECODING_H_ |
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#include <e32base.h> |
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class CBitmapScaler; |
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class CImageDecoder; |
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class CFbsBitmap; |
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class RFs; |
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class MCCAppImageDecodingObserver |
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{ |
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public: |
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/** |
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* Bitmap is decoded. |
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* @param aBitmap Decoded bitmap, ownership is transferred. |
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*/ |
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virtual void BitmapReadyL( CFbsBitmap* aBitmap ) = 0; |
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protected: |
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MCCAppImageDecodingObserver() {}; |
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virtual ~MCCAppImageDecodingObserver() {}; |
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}; |
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/** |
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* Utility class for asynchronously decoding the header thumbnail image |
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* |
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* @code |
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* ?good_class_usage_example(s) |
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* @endcode |
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* |
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* @lib ccapputil.dll |
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* @since S60 v9.2 |
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*/ |
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NONSHARABLE_CLASS( CCCAppImageDecoding ) : public CActive |
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{ |
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public: |
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/** |
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* Two-phased constructor |
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* |
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* @param aObserver |
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* @param aBitmapData Descriptor containing the bitmap data stream, takes ownership |
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* @param aImageFile Descriptor containing image file name full path, takes ownership |
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*/ |
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IMPORT_C static 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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* Destructor |
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*/ |
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~CCCAppImageDecoding(); |
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/** |
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* Starts the decoding process |
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* |
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* @param aImageSize defines image size |
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*/ |
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IMPORT_C void StartL( const TSize& aImageSize ); |
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private: |
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/** |
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* From CActive |
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* (see details from baseclass ) |
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*/ |
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void RunL(); |
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/** |
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* From CActive |
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* (see details from baseclass ) |
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*/ |
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void DoCancel(); |
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private: |
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/** |
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* First-phase (C++) constructor |
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*/ |
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inline 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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/** |
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* Second phase constructor |
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*/ |
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inline void ConstructL(); |
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/** |
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* Scales bitmap |
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* |
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*/ |
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void ScaleBitmapL(); |
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void CropBitmapL(); |
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/** |
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* Create bitmap |
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* |
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*/ |
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void CreateBitmapL(); |
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enum TCcaImageDecoderState |
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{ |
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ECcaConvertThumbnailImage = 1, |
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ECcaScaleThumbnail, |
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ECcaReadImageFromFile, |
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ECcaConvertImageFromFile, |
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ECcaScaleImage |
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}; |
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/** |
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* The image scaler whose service is called to scale the image |
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* Own. |
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*/ |
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CBitmapScaler* iBitmapScaler; |
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/** |
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* The image decoder whose service is called to decode the image |
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* Own. |
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*/ |
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CImageDecoder* iImgDecoder; |
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MCCAppImageDecodingObserver& iObserver; |
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/** |
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* Handle to the file server session for loading the bitmap |
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*/ |
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RFs& iFs; |
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/** |
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* The bitmap. |
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* Owned until decoding is complete, then ownersip is transferred to header control. |
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*/ |
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CFbsBitmap* iBitmap; // owned until completion |
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/** |
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* Own. |
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*/ |
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HBufC8* iBitmapData; |
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/** |
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* Own. |
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*/ |
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HBufC* iImageFullName; |
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/** |
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* Contact bitmap size |
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*/ |
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TSize iBitmapSize; |
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/** |
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* Decoder internal state |
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*/ |
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TInt iDecoderState; |
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/** |
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* Timer used to delay image conversion |
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*/ |
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RTimer iTimer; |
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}; |
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#endif /*CCAPPIMAGEDECODING_H_*/ |