imagehandlinglib/Src/IHLImageFactory.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 00:23:15 +0200
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permissions -rw-r--r--
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/*
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* Copyright (c) 2004-2007 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:  Static factory class for creating file instances.
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*
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*/
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// INCLUDE FILES
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#include <IHLImageFactory.h>
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#include "CIHLFileImage.h"
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#include "CIHLFileImageExtJpg.h"
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#include <IclExtJpegApi.h>
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// Private namespace for constants and functions
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namespace
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	{
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	// First image index
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	const TInt KIHLFirstImage = 0;
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	const TInt KIHLNullOptions = 0;
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	const TInt KMimeTypeStringLength = 255;
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	_LIT( KJpgType, "image/jpeg" );
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    // Helper functions
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    // -----------------------------------------------------------------------------
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    // OpenExtendedFileImageL
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    // -----------------------------------------------------------------------------
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    //
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	CIHLFileImageExtJpg* OpenExtendedFileImageL( RFs& aFs, const TDesC& aFilename,
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												TInt aImageIndex, const TUint32 aOptions )
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		{
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		CIHLFileImageExtJpg* fileImageExtJpg = NULL;
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        TRAPD( err, fileImageExtJpg = CIHLFileImageExtJpg::NewL( aFs, aFilename,
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                                                           aImageIndex, aOptions ) );
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        if( !err )
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            {
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            // Hw or Sw extended decoder found; check for cropping capability
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            CleanupStack::PushL( fileImageExtJpg );
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            if( !( fileImageExtJpg->CapabilitiesL() & CExtJpegDecoder::ECapCropping ) )
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                {
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                //Decoder does not support cropping, use the old implementation
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                CleanupStack::PopAndDestroy( fileImageExtJpg );
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                fileImageExtJpg = NULL;
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                }
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            else
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                {
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                CleanupStack::Pop( fileImageExtJpg );
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                }
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            }
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        return fileImageExtJpg;
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		}
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    // -----------------------------------------------------------------------------
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    // MimeTypeIsJpgL
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    // -----------------------------------------------------------------------------
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    //
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    TBool MimeTypeIsJpgL( RFile& aFile )
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        {
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        using namespace ContentAccess;
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        TBuf<KMimeTypeStringLength> mime;
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        CContent* content = CContent::NewL( aFile );
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        CleanupStack::PushL( content );
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        CData* data = content->OpenContentL( EPeek );
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        CleanupStack::PushL( data );
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        User::LeaveIfError( data->GetStringAttribute( EMimeType, mime ) );
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        CleanupStack::PopAndDestroy( 2 ); //data, content
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        if( mime.Compare( KJpgType ) == 0 ) return ETrue;
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        return EFalse;
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        }
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	}
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// ============================ STATIC FUNCTIONS ===============================
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// -----------------------------------------------------------------------------
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// IHLImageFactory::OpenFileImageL
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// -----------------------------------------------------------------------------
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//
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EXPORT_C MIHLFileImage* IHLImageFactory::OpenFileImageL( RFs& aFs, const TDesC& aFilename )
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	{
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	RFile fileHandle;
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	TInt err( fileHandle.Open( aFs, aFilename, EFileShareReadersOnly ) );
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	if( err )
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		{
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		User::LeaveIfError( fileHandle.Open( aFs, aFilename, EFileShareAny ) );
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		}
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	CleanupClosePushL( fileHandle );
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	if ( MimeTypeIsJpgL( fileHandle ) )
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		{
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		CIHLFileImageExtJpg* fileImageExtJpg = OpenExtendedFileImageL( aFs,
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																	aFilename,
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																	KIHLFirstImage,
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																	KIHLNullOptions );
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		if ( fileImageExtJpg )
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			{
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			CleanupStack::PopAndDestroy();	// fileHandle.Close()
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			return fileImageExtJpg;
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			}
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		}
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	CIHLFileImage* fileImage = CIHLFileImage::NewL( fileHandle, KIHLFirstImage, KIHLNullOptions );
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	CleanupStack::PopAndDestroy(); // fileHandle.Close()
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	return fileImage;
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	}
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// -----------------------------------------------------------------------------
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// IHLImageFactory::OpenFileImageL
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// -----------------------------------------------------------------------------
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//
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EXPORT_C MIHLFileImage* IHLImageFactory::OpenFileImageL( RFs& aFs, const TDesC& aFilename,
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														 TInt aImageIndex )
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	{
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	RFile fileHandle;
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	TInt err( fileHandle.Open( aFs, aFilename, EFileShareReadersOnly ) );
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	if( err )
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		{
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		User::LeaveIfError( fileHandle.Open( aFs, aFilename, EFileShareAny ) );
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		}
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	CleanupClosePushL( fileHandle );
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	if ( MimeTypeIsJpgL( fileHandle ) )
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		{
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		CIHLFileImageExtJpg* fileImageExtJpg = OpenExtendedFileImageL( aFs,
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																	aFilename,
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																	aImageIndex,
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																	KIHLNullOptions );
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		if ( fileImageExtJpg )
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			{
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			CleanupStack::PopAndDestroy();	// fileHandle.Close()
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			return fileImageExtJpg;
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			}
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		}
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	CIHLFileImage* fileImage = CIHLFileImage::NewL( fileHandle, aImageIndex, KIHLNullOptions );
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	CleanupStack::PopAndDestroy(); // fileHandle.Close()
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	return fileImage;
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	}
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// -----------------------------------------------------------------------------
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// IHLImageFactory::OpenFileImageL
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// -----------------------------------------------------------------------------
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//
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EXPORT_C MIHLFileImage* IHLImageFactory::OpenFileImageL( RFs& aFs, const TDesC& aFilename,
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														 TInt aImageIndex, const TUint32 aOptions )
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	{
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	RFile fileHandle;
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	TInt err( fileHandle.Open( aFs, aFilename, EFileShareReadersOnly ) );
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	if( err )
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		{
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		User::LeaveIfError( fileHandle.Open( aFs, aFilename, EFileShareAny ) );
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		}
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	CleanupClosePushL( fileHandle );
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	if ( MimeTypeIsJpgL( fileHandle ) )
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		{
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		CIHLFileImageExtJpg* fileImageExtJpg = OpenExtendedFileImageL( aFs,
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																	aFilename,
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																	aImageIndex,
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																	aOptions );
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		if ( fileImageExtJpg )
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			{
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			CleanupStack::PopAndDestroy();	// fileHandle.Close()
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			return fileImageExtJpg;
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			}
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		}
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	CIHLFileImage* fileImage = CIHLFileImage::NewL( fileHandle, aImageIndex, aOptions );
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	CleanupStack::PopAndDestroy(); // fileHandle.Close()
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	return fileImage;
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	}
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// -----------------------------------------------------------------------------
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// IHLImageFactory::OpenFileImageL
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// -----------------------------------------------------------------------------
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//
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EXPORT_C MIHLFileImage* IHLImageFactory::OpenFileImageL( RFile& aFile )
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	{
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	return CIHLFileImage::NewL( aFile, KIHLFirstImage, KIHLNullOptions );
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	}
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// -----------------------------------------------------------------------------
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// IHLImageFactory::OpenFileImageL
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// -----------------------------------------------------------------------------
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//
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EXPORT_C MIHLFileImage* IHLImageFactory::OpenFileImageL( RFile& aFile, TInt aImageIndex )
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	{
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	return CIHLFileImage::NewL( aFile, aImageIndex, KIHLNullOptions );
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	}
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// -----------------------------------------------------------------------------
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// IHLImageFactory::OpenFileImageL
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// -----------------------------------------------------------------------------
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//
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EXPORT_C MIHLFileImage* IHLImageFactory::OpenFileImageL( RFile& aFile, TInt aImageIndex,
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														 const TUint32 aOptions )
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	{
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	return CIHLFileImage::NewL( aFile, aImageIndex, aOptions );
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	}
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// -----------------------------------------------------------------------------
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// IHLImageFactory::OpenBufferedFileImageL
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// -----------------------------------------------------------------------------
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//
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EXPORT_C MIHLFileImage* IHLImageFactory::OpenBufferedFileImageL( RFs& aFs, const TDesC8& aDataBuf )
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	{
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	return CIHLFileImage::NewL( aFs, aDataBuf, KIHLFirstImage, KIHLNullOptions );
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	}
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// -----------------------------------------------------------------------------
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// IHLImageFactory::OpenBufferedFileImageL
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// -----------------------------------------------------------------------------
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//
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EXPORT_C MIHLFileImage* IHLImageFactory::OpenBufferedFileImageL( RFs& aFs,
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                                        const TDesC8& aDataBuf, TInt aImageIndex )
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	{
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	return CIHLFileImage::NewL( aFs, aDataBuf, aImageIndex, KIHLNullOptions );
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	}
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// -----------------------------------------------------------------------------
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// IHLImageFactory::OpenBufferedFileImageL
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// -----------------------------------------------------------------------------
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//
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EXPORT_C MIHLFileImage* IHLImageFactory::OpenBufferedFileImageL( RFs& aFs,
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            const TDesC8& aDataBuf, TInt aImageIndex, const TUint32 aOptions )
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	{
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	return CIHLFileImage::NewL( aFs, aDataBuf, aImageIndex, aOptions );
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	}
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//  End of File