author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 14 May 2010 15:47:24 +0300 | |
changeset 23 | 98ccebc37403 |
parent 21 | 2a9601315dfc |
permissions | -rw-r--r-- |
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/******************************************************************************* |
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* Copyright (c) 2005, 2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. This program and the accompanying materials |
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* are made available under the terms of the Eclipse Public License v1.0 |
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* which accompanies this distribution, and is available at |
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* http://www.eclipse.org/legal/epl-v10.html |
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* |
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* Contributors: |
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* Nokia Corporation - S60 implementation |
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*******************************************************************************/ |
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#ifndef SWTIMAGEDATALOADER_H |
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#define SWTIMAGEDATALOADER_H |
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#include "eswtgraphics.h" |
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class CImageDecoder; |
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class CImageEncoder; |
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class TFrameInfo; |
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/** |
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* CSwtImageDataLoader |
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* Class used to encode and decode images (PNG, GIF, JPG). |
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* @lib eswt |
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*/ |
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NONSHARABLE_CLASS(CSwtImageDataLoader) |
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: public CActive |
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, public MSwtImageDataLoader |
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{ |
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// Own methods |
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public: |
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|
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/** |
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* Two phase constructor. |
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* Create the native object in charge of load and save image from/to a stream or a file. |
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*/ |
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static CSwtImageDataLoader* NewL(); |
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// From MSwtImageDataLoader |
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public: |
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void EncodeImageToFileL(MSwtImageData& aImageData, |
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TInt aFormat, const TDesC& aDestination); |
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HBufC8* EncodeImageToStreamL(MSwtImageData& aImageData, TInt aFormat); |
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void DecodeImageL(const TDesC& aFileName); |
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void DecodeWholeImageFromBufferL(const TDesC8& aBuffer); |
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void DecodeImageFromBufferL(const TDesC8& aBuffer); |
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void AppendDataL(const TDesC8& aBuffer); //loading |
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CSwtImageDataArray* GetImageData(); |
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void Dispose(); |
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TInt GetLogicalScreenHeight(); |
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TInt GetLogicalScreenWidth(); |
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// Own methods |
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private: |
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TBool DecodeNextFrameL(); //starting |
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void DecodeFrameL(TInt aIndexOfFrame); //starting |
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protected: |
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/** |
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* Destructor. |
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*/ |
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~CSwtImageDataLoader(); |
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private: |
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CSwtImageDataLoader(); |
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void ConstructL(); |
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void SetImageDataL(MSwtImageData& aImageData); |
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/** |
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* Extract the ImageData from the members bitmap. |
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*/ |
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void ExtractImagedataL(); |
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/** |
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* Build the mask bitmap if needed. |
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*/ |
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void SetMaskL(const TFrameInfo& aInfo); |
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/** |
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* Ensure that the bitmap resources are freed before |
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* reusing the decoder (for multi frame image). |
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*/ |
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void FreeBitmaps(); |
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/** |
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* Free buffers. |
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*/ |
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void FreeBuffers(); |
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/** |
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* Set the logical values for height or width equal to |
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* the values of the greatest frame (for height or width). |
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*/ |
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void SetLogicalScreenValues(const TFrameInfo& aInfo); |
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/** |
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* Set the x and y coordinates of the image in the current frame. |
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*/ |
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void SetFrameInfosL(const TFrameInfo& aInfo); |
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|
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/** |
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* Leaves if a leave happens. Transforms the leave's code into one expected by eSWT. |
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* A leave code that is not handled in the function causes |
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* the leave to be performed with the unchanged leave code. |
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* @param aLeaveCode : the leave code to convert(if equal to KerrNone : do not leave) |
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*/ |
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void LeaveIfErrorFromICLDecoderL(TInt aLeaveCode) const; |
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|
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|
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/** |
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* Leaves if a leave happens. Transforms the leave's code into one expected by eSWT. |
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* A leave code that is not handled in the function causes |
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* the leave to be performed with the unchanged leave code. |
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* @param aLeaveCode : the leave code to convert(if equal to KerrNone : do not leave) |
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*/ |
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void LeaveIfErrorFromICLEncoderL(TInt aLeaveCode) const; |
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|
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/** |
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* Verify the file pointed by destination can be created and does not already exists. |
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* @param aDestination : The file that is checked |
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* @param aFs : a RFs object. |
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*/ |
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void CheckDestinationL(const TDesC& aDestination, const RFs& aFs) const; |
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|
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const TDesC8& GetMimeType(TSwtImageType aFormat) const; |
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|
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// From CActive |
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void RunL(); |
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void DoCancel(); |
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TInt RunError(TInt aError); |
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|
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private: |
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CFbsBitmap* iMask; // The possible mask of the image |
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CFbsBitmap* iBitmap; // The image bitmap (without its mask) |
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MSwtImageData::TInfo iInfo; |
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TSize iLogicalScreenValues; // LogicalScreenHeight and Width |
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TPoint iImageCoordinates; // The coordinates of the frame within the screen in pixels. |
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TInt iDelay; // The delay time of a gif |
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TSwtGifDisposal iDisposal; // The disposal method of a gif image |
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CImageDecoder* iDecoder; // Current decoder. Is a member to be persistent in order to be used asynchronously |
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MSwtImageData* iImageData; // The imageData built when the conversion is finished |
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CSwtImageDataArray* iImageDataArray; // The imageData array built step by step depending on how many images are stored in the image file/stream |
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TInt iNextFrameToDecode; // The next frame we will decode |
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HBufC8* iBuffer; // The data to decode when loading or the data encoded when saving |
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TBool iStartDecodingAnother;// ETrue if a frame has just been decoded and ready to decode another frame. |
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TPtr8 iDesc; // The descriptor furnished to the Convert function |
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TInt iResult; // The code returned to the caller. |
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TBool iWholeImageAtOnce; // ETrue when decoding whole image in one shot |
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CImageEncoder* iEncoder; // Current encoder. Is a member to be persistent in order to be used asynchronously |
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CActiveScheduler* iActiveScheduler; // Installed active scheduler. |
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RFs iFs; // File server session. |
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TBool iIsGif; |
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TRequestStatus* iImageStatus; |
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}; |
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|
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|
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#endif // SWTIMAGEDATALOADER_H |