author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 21 Jun 2010 15:40:32 +0300 | |
branch | RCL_3 |
changeset 47 | f9e827349359 |
parent 0 | 4e91876724a2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2009 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: Texture Manager component/Decodes the Image in step for large images |
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* |
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*/ |
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#ifndef C_GLXBITMAPDECODERWRAPPER_H |
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#define C_GLXBITMAPDECODERWRAPPER_H |
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// INCLUDE FILES |
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#include<alf/alftimedvalue.h> |
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#include <IclExtJpegApi.h> // For CExtJpegDecoder |
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/** |
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* Observer interface used to be notified when texture bitmap is completed. |
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*/ |
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NONSHARABLE_CLASS( MGlxBitmapDecoderObserver ) |
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{ |
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public: |
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/** |
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* Called when the content of the texture is changed. |
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* @param aHasContent Whether the texture now has content. |
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*/ |
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virtual void HandleBitmapDecodedL(TInt aThumbnailIndex,CFbsBitmap* aBitmap) = 0; |
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}; |
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/** |
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* This class does the decoding of the images in steps depending on the size of the images . |
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* this is a wrapper class, doesn't actually decode the images. |
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*/ |
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class CGlxBitmapDecoderWrapper: public CActive |
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{ |
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public: |
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/*This Enums specifies the state of the Decoding*/ |
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enum TDecoderState |
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{ |
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ESTate0, ESTate1,ESTateFinal |
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}; |
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/*This Enums specifies the size of the images*/ |
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enum TImageLevel |
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{ |
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ELevel0, ELevel1,ELevel2 |
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}; |
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/** |
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* Two-phased constructor |
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* @param aObserver:The Observer contains the CGlxTextureManagerImpl Object |
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* @return Constructed object |
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*/ |
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static CGlxBitmapDecoderWrapper* NewL(MGlxBitmapDecoderObserver* aObserver); |
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/** |
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* Destructor |
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*/ |
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~CGlxBitmapDecoderWrapper(); |
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/** |
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* intiates the Decoding the Image and updates the no:of steps to decode |
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* @param aSourceFileName :contains the file name |
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* @param aindex:contains the index value |
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*/ |
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void DoDecodeImageL(const TDesC & aSourceFileName,TInt aIndex); |
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/** |
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* starts the decoding and updates the state of the decoding |
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*/ |
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void DecodeImageL(); |
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/** |
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* Request free memory with Out of Memory Monitor |
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* @param aBytesRequested : Request for free memory in Bytes |
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*/ |
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TInt OOMRequestFreeMemoryL( TInt aBytesRequested); |
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public: |
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/** |
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* Standard Active object functions |
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*/ |
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virtual void RunL(); |
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virtual void DoCancel(); |
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private: |
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/** |
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* Constructor |
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*/ |
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CGlxBitmapDecoderWrapper(); |
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/** |
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* Second-phase constuction |
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*/ |
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void ConstructL(MGlxBitmapDecoderObserver* aObserver); |
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/** |
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* If the image format is non jpeg, then we need to calculate as per |
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* reduction factor and reduced size as what the decoder is going to return us |
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* This function returns if that needs to be done. |
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*/ |
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TBool DoesMimeTypeNeedsRecalculateL(); |
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/** |
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* Recalculate the size for png/bmp as decoder fails to |
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* decode for desired size |
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*/ |
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TSize ReCalculateSizeL(); |
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private: |
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/* Contains the TextureManagerImpl object,calls the HandleBitmapDecoded*/ |
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MGlxBitmapDecoderObserver* iObserver; |
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/*Specifies the Decoder */ |
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CImageDecoder* iImageDecoder; // decoder from ICL API |
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/*Contains the Thumbnail Index*/ |
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TInt iThumbnailIndex; |
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/*Contains the Bitmap generated*/ |
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CFbsBitmap* iBitmap; |
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/*contains the original size of the image*/ |
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TAlfRealSize iOriginalSize; |
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/*A handle to a file server session.*/ |
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RFs iFs; |
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/*To store the target image size*/ |
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TSize iTargetBitmapSize; |
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/*To store the image uri path*/ |
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HBufC* iImagePath; |
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#ifdef _DEBUG |
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TTime iStartTime; |
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TTime iStopTime; |
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#endif |
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}; |
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#endif //C_GLXBITMAPDECODERWRAPPER_H |