author | Mikael Laine <mikael.laine@ixonos.com> |
Fri, 29 Jan 2010 13:53:17 +0200 | |
changeset 1 | edfc90759b9f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2010 Ixonos Plc. |
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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 the "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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* Ixonos Plc |
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* |
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* Description: |
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* |
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*/ |
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|
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#ifndef JPEGROTATOR_H |
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#define JPEGROTATOR_H |
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|
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// INCLUDES |
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#include <e32base.h> |
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// CONSTANTS |
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// FORWARD DECLARATIONS |
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class CJpegRotatorImpl; |
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class RFs; |
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/* CLASS: MJpegRotatorObserver |
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* |
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* Observer interface, which can be optionally implemented |
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* to receive progress information during the image rotation |
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* (in block mode only). |
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* |
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*/ |
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class MJpegRotatorObserver |
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{ |
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public: |
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|
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/** |
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* Informs the caller that one set of image data blocks has been |
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* processed, so the progress bar should be incremented. |
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* The size of the progress increment is returned by RotateImageL |
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* |
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* @param - |
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* @param - |
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*/ |
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virtual void Increment() = 0; |
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}; |
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|
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/* CLASS: CJpegRotator |
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* |
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* Rotates an image in 90 degrees steps. |
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* Available rotation modes: |
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* |
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* - ERotModeCounterClockwise, |
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* - ERotModeClockwise, |
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* - ERotMode90, |
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* - ERotMode180, |
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* - ERotMode270 |
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* |
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* |
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* USAGE |
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* |
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* Example 1: asynchronous rotate |
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* |
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* iJpegRotator = CJpegRotator::NewL( iEikonEnv->FsSession() ); |
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* |
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* // Launch wait dialog |
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* iWaitDialog = new (ELeave) CAknWaitDialog ( |
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* reinterpret_cast<CEikDialog**>(&iWaitDialog), |
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* ETrue ); |
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* iWaitDialog->SetTone( CAknNoteDialog::EConfirmationTone ); |
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* iWaitDialog->ExecuteLD( R_WAIT_DIALOG ); |
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* |
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* // Start waiting active object. Inthis example, we have an dedicated AO |
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* // to wait for the completion, but of course the caller could itself be the AO. |
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* delete iWaiter; |
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* iWaiter = new (ELeave) CJpegRotatorTestWaiter (*this); |
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* iWaiter->StartWaitL(); |
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* |
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* // Start rotate |
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* iJpegRotator->RotateImageL( (iWaiter->iStatus), iSource, iTarget, CJpegRotator::ERotModeClockwise ); |
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* ... |
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* ... |
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* // When the rotate is finished, (iWaiter->iStatus) will be completed with KErrNone, |
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* // or an error code, if the rotate failed or was cancelled. |
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* |
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* |
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*/ |
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class CJpegRotator : public CBase |
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{ |
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|
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public: |
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|
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/** @name Typedefs:*/ |
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//@{ |
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enum TRotationMode |
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{ |
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ERotModeCounterClockwise = 0, |
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ERotModeClockwise = 1, |
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ERotMode90 = ERotModeCounterClockwise, |
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ERotMode180 = 2, |
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ERotMode270 = ERotModeClockwise, |
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ERotMode0 = 3 |
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}; |
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//@} |
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|
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/** @name Methods:*/ |
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//@{ |
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/** NewLC factory method, does not pop cleanup stack |
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* |
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* @param - aFsSession |
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* @param - aObserver |
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* @return pointer to created CJpegRotator object |
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*/ |
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IMPORT_C static CJpegRotator * NewLC ( RFs & aFsSession ); |
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/** NewL factory method, pops cleanup stack |
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* |
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* @param - aFsSession |
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* @param - aObserver |
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* @return pointer to created CJpegRotator object |
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*/ |
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IMPORT_C static CJpegRotator * NewL ( RFs & aFsSession ); |
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/** Destructor |
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* |
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* @param - |
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* @return - |
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*/ |
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IMPORT_C ~CJpegRotator (); |
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/** RotateImageL |
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* |
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* Rotates the JPEG image, asynchronous one-block version. |
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* |
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* Lossless rotate mode is used by default |
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* |
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* Starts the rotate. After the rotation is completed, the |
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* supplied TRequestStatus is completed. |
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* |
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* If the rotation fails, the request is completed with the error code, |
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* KErrNone otherwise. The function may also leave, if the error happens |
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* during the pre-rotate check phase. |
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* |
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* Possible error codes include: |
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* - KErrArgument if the rotation argument is out of range. |
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* - KErrNotFound if the source file does not exist. |
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* - KErrCorrupt if the source image could not be read. |
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* - KErrNotSupported if the image type can't be handled (not baseline JPEG) |
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* - KErrPathNotFound if the target path does not exist. |
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* - KErrAlreadyExists if the target file already exists. |
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* - Other system-wide error codes. |
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* |
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* @param aStatus - |
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* Reference to the TRequestStatus of an active object, |
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* which will be completed when the rotation finishes. |
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* @param aRotationMode - The rotation direction |
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* @param aSourceFileName - The image to be rotated |
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* @param aTargetFileName - The target file where the rotated image will be saved |
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* @param aHandleExifData - Do we update/create the EXIF data in the JPEG image |
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* @param aForceLossyMode - Use lossy mode instead of lossless mode |
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* @return - |
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*/ |
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IMPORT_C void RotateImageL ( |
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TRequestStatus & aStatus, |
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const TDesC & aSourceFileName, |
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const TDesC & aTargetFileName, |
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CJpegRotator::TRotationMode aRotationMode, |
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TBool aHandleExifData = ETrue, |
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TBool aForceLossyMode = EFalse |
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); |
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/** Cancel |
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* |
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* @param - |
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* @return - |
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*/ |
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IMPORT_C void Cancel (); |
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//@} |
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|
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private: |
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/** @name Methods:*/ |
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//@{ |
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/** Default constructor |
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* @param - |
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* @return - |
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*/ |
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CJpegRotator (); |
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|
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/** Second phase constructor, may leave |
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* |
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* @param - aFsSession |
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* @return - |
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*/ |
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void ConstructL ( RFs& aFsSession ); |
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//@} |
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/** @name Members:*/ |
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//@{ |
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/// Internal representation |
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CJpegRotatorImpl * iImplementation; |
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//@} |
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}; |
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#endif |
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// End of File |