fbs/fontandbitmapserver/sfbs/BMPASTR.CPP
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:47:50 +0200
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permissions -rw-r--r--
Revision: 201003 Kit: 201005
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// Copyright (c) 1995-2009 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:
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//
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#include <s32file.h>
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#include <fbs.h>
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#include <bitmap.h>
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#include <graphics/bitmapuid.h>
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#include "fbsbitmapasyncstreamer.h"
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CFbsBitmapAsyncStreamer::CFbsBitmapAsyncStreamer(TMode aMode):
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	CBase(),
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	iFbs(RFbsSession::GetSession()),
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	iMode(aMode)
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	{}
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EXPORT_C CFbsBitmapAsyncStreamer::~CFbsBitmapAsyncStreamer()
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	{
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	iReadStream.Close();
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	iWriteStream.Close();
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	delete iStore;
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	if(iMode==ELoad) delete iBitmap;
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	}
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EXPORT_C CFbsBitmapAsyncStreamer* CFbsBitmapAsyncStreamer::NewL(TMode aMode)
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	{
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	CFbsBitmapAsyncStreamer* thisptr=new(ELeave) CFbsBitmapAsyncStreamer(aMode);
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	CleanupStack::PushL(thisptr);
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	thisptr->ConstructL();
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	CleanupStack::Pop();
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	return(thisptr);
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	}
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void CFbsBitmapAsyncStreamer::ConstructL()
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	{
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	if(iMode==ELoad) iBitmap=new(ELeave) CFbsBitmap;
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	}
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EXPORT_C TInt CFbsBitmapAsyncStreamer::Load(const TDesC& aFilename,TInt32 aId,TInt& aScanLines)
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	{
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	if(iMode!=ELoad) return(KErrGeneral);
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	TRAPD(ret,DoLoadL(aFilename,aId));
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	if(ret!=KErrNone) return(ret);
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	iDispMode = CBitwiseBitmap::DisplayMode(iHeader.iBitsPerPixel,iHeader.iColor);
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	ret=iBitmap->Create(iHeader.iSizeInPixels,iDispMode);
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	iBitmap->BeginDataAccess();
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	iBitmap->Address()->iHeader=iHeader;
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	if(ret!=KErrNone) return(ret);
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	aScanLines=iHeader.iSizeInPixels.iHeight;
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	iScanLineBase=(TUint32*)iBitmap->DataAddress();
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	return(KErrNone);
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	}
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void CFbsBitmapAsyncStreamer::DoLoadL(const TDesC& aFilename,TInt32 aId)
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	{
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	iStore=CDirectFileStore::OpenL(iFbs->FileServer(),aFilename,EFileShareReadersOnly);
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	if (iStore->Type()[1]!=KMultiBitmapFileImageUid)
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		User::LeaveIfError(KErrGeneral);
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	TStreamId streamid=iStore->Root();
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	RStoreReadStream readstream;
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	readstream.OpenL(*iStore,streamid);
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	TInt numbitmaps=readstream.ReadInt32L();
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	if(numbitmaps<aId+1)
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		User::Leave(KErrUnknown);
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	TStreamId bmpstreamid;
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	bmpstreamid.InternalizeL(readstream);
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	for(TInt count=0;count<aId;count++)
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		bmpstreamid.InternalizeL(readstream);
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	readstream.Close();
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	iReadStream.OpenL(*iStore,bmpstreamid);
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	CBitwiseBitmap::InternalizeHeaderL(iReadStream,iHeader);
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	}
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EXPORT_C TBool CFbsBitmapAsyncStreamer::LoadScanLinesL(TInt aNumberOfScanLines,CFbsBitmap*& aBitmap)
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	{
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	if(iMode!=ELoad || iBitmap==NULL) User::Leave(KErrGeneral);
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	if(iHeader.iCompression!=ENoBitmapCompression)
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		{
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		TRAP_IGNORE(iBitmap->Address()->DoInternalizeL(iReadStream,iHeader.iBitmapSize-iHeader.iStructSize,iBitmap->DataAddress()));
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		iBitmap->EndDataAccess(EFalse);
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		aBitmap=iBitmap;
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		iBitmap=NULL;
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		return(ETrue);
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		}
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	aNumberOfScanLines=Abs(aNumberOfScanLines);
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	if(aNumberOfScanLines+iCurrentScanLine>iHeader.iSizeInPixels.iHeight)
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		aNumberOfScanLines=iHeader.iSizeInPixels.iHeight-iCurrentScanLine;
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	TInt slbytes = CBitwiseBitmap::ByteWidth(iHeader.iSizeInPixels.iWidth,iDispMode);
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	TUint8* sladd=(TUint8*)iBitmap->Address()->ScanLineAddress(iScanLineBase,iCurrentScanLine);
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	iReadStream.ReadL(sladd,aNumberOfScanLines*slbytes);
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	iCurrentScanLine+=aNumberOfScanLines;
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	if(iCurrentScanLine==iHeader.iSizeInPixels.iHeight)
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		{
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   109
		iBitmap->EndDataAccess(EFalse);
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   110
		aBitmap=iBitmap;
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		iBitmap=NULL;
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   112
		return(ETrue);
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   113
		}
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	return(EFalse);
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   115
	}
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   116
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   117
EXPORT_C TInt CFbsBitmapAsyncStreamer::Save(const TDesC& aFilename,CFbsBitmap* aBitmap,TInt32& aId,TInt& aScanLines)
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	{
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   119
	if(iMode!=ESave || aBitmap==NULL || !aBitmap->iHandle) return(KErrGeneral);
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	RFile file;
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	TInt ret=file.Replace(iFbs->FileServer(),aFilename,EFileWrite);
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   122
	if(ret!=KErrNone) return(ret);
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   123
	iHeader=aBitmap->Header();
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   124
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	iDispMode = CBitwiseBitmap::DisplayMode(iHeader.iBitsPerPixel,iHeader.iColor);
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   126
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	TRAP(ret,DoSaveL(file));
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	if(ret!=KErrNone) return(ret);
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   129
	aId=0;
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	iBitmap=aBitmap;
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   131
	iBitmap->BeginDataAccess();
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   132
	aScanLines=iHeader.iSizeInPixels.iHeight;
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   133
	iScanLineBase=(TUint32*)aBitmap->DataAddress();
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   134
	return(KErrNone);
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   135
	}
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   136
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   137
void CFbsBitmapAsyncStreamer::DoSaveL(RFile& aFile)
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   138
	{
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   139
	iStore=CDirectFileStore::NewL(aFile);
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   140
	TUidType uidtype(KDirectFileStoreLayoutUid,KMultiBitmapFileImageUid);
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   141
	iStore->SetTypeL(uidtype);
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   142
	iId=iWriteStream.CreateL(*iStore);
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   143
	iWriteStream.WriteInt32L(iHeader.iBitmapSize);
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   144
	iWriteStream.WriteInt32L(iHeader.iStructSize);
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   145
	iWriteStream.WriteInt32L(iHeader.iSizeInPixels.iWidth);
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   146
	iWriteStream.WriteInt32L(iHeader.iSizeInPixels.iHeight);
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   147
	iWriteStream.WriteInt32L(iHeader.iSizeInTwips.iWidth);
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   148
	iWriteStream.WriteInt32L(iHeader.iSizeInTwips.iHeight);
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   149
	iWriteStream.WriteInt32L(iHeader.iBitsPerPixel);
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   150
	iWriteStream.WriteUint32L(iHeader.iColor);
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   151
	iWriteStream.WriteInt32L(0);
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   152
	iWriteStream.WriteUint32L(iHeader.iCompression);
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   153
	}
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   154
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   155
EXPORT_C TBool CFbsBitmapAsyncStreamer::SaveScanLinesL(TInt aNumberOfScanLines)
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   156
	{
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   157
	if(iMode!=ESave || iBitmap==NULL) User::Leave(KErrGeneral);
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   158
	aNumberOfScanLines=Abs(aNumberOfScanLines);
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   159
	if(aNumberOfScanLines+iCurrentScanLine>iHeader.iSizeInPixels.iHeight)
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   160
		aNumberOfScanLines=iHeader.iSizeInPixels.iHeight-iCurrentScanLine;
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   161
	TInt slbytes = CBitwiseBitmap::ByteWidth(iHeader.iSizeInPixels.iWidth,iDispMode);
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   162
	TUint8* sladd=(TUint8*)iBitmap->Address()->ScanLineAddress(iScanLineBase,iCurrentScanLine);
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   163
	iWriteStream.WriteL(sladd,aNumberOfScanLines*slbytes);
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   164
	iCurrentScanLine+=aNumberOfScanLines;
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   165
	if(iCurrentScanLine==iHeader.iSizeInPixels.iHeight)
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   166
		{
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   167
		iBitmap->EndDataAccess(ETrue);
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   168
		iWriteStream.Close();
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   169
		TStreamId headstreamid=iWriteStream.CreateL(*iStore);
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   170
		iWriteStream.WriteInt32L(1); // number of bitmaps
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   171
		iId.ExternalizeL(iWriteStream); // stream id of bitmap
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   172
		iWriteStream.Close();
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   173
		iStore->SetRootL(headstreamid);
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   174
		delete iStore;
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   175
		iStore=NULL;
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   176
		return(ETrue);
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   177
		}
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   178
	return(EFalse);
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   179
	}
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   180