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// Copyright (c) 1999-2009 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 <fbs.h>
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#include "ImageClientMain.h"
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#include "TIFFCodec.h"
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#include "TIFFFax.h"
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#include "ImageUtils.h"
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// CTiffReadCodec.
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CTiffReadCodec::CTiffReadCodec(TTiffFormatInfo aFormatInfo, CTiffDecoder& aPlugin)
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: iFormatInfo(aFormatInfo),
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iValueReader(aFormatInfo.iEndianness),
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iPlugin(aPlugin)
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{}
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CTiffReadCodec::~CTiffReadCodec()
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{
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if (iFrameImageData && iFrameImageData->iStripInfo)
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delete iFrameImageData->iStripInfo;
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delete iFrameImageData;
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delete iIfdBuffer;
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delete iLongValuesBuffer;
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delete iDecoder;
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delete iRecordTable;
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}
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CTiffReadCodec* CTiffReadCodec::NewL(TTiffFormatInfo aFormatInfo, CTiffDecoder& aPlugin)
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{
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CTiffReadCodec* self = new(ELeave) CTiffReadCodec(aFormatInfo, aPlugin);
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CleanupStack::PushL(self);
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self->ConstructL();
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CleanupStack::Pop(self);
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return self;
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}
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void CTiffReadCodec::InitFrameHeader(TFrameInfo& aFrameSettings, CFrameImageData& aFrameImageData)
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{
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iImageInfo = &aFrameSettings;
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iImageData = &aFrameImageData;
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if (iRecordTable && (iProcessHeaderState == EReadIfd))
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{
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iRecordTable->Reset();
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}
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}
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TFrameState CTiffReadCodec::ProcessFrameHeaderL(TBufPtr8& aData)
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{
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const TUint8* ptr = aData.Ptr();
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const TUint8* const ptrStart = ptr;
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const TUint8* const ptrLimit = ptr + aData.Length();
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if (iImageInfo->CurrentFrameState() == TFrameInfo::EFrameInfoUninitialised)
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{
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iImageInfo->SetCurrentFrameState(TFrameInfo::EFrameInfoProcessingFrameHeader);
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if (ptrStart + 4 > ptrLimit)
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User::Leave(KErrUnderflow);
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TUint32 signature = PtrReadUtil::ReadUint32(ptr);
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if (iFormatInfo.iSignature == signature)
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return EFrameComplete;
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iProcessHeaderState = EReadIfd;
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iNumIfdEntries = 0;
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iLongValuesStartOffset = KMaxTInt;
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iLongValuesEndOffset = 0;
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iLoadedLongValuesSize = 0;
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if (iFrameImageData && iFrameImageData->iStripInfo)
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delete iFrameImageData->iStripInfo;
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delete iFrameImageData;
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iFrameImageData = NULL;
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iFrameImageData = new(ELeave) TTiffImageData;
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iFrameImageData->iNewSubfileType = 0;
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iFrameImageData->iSizeInPixels = TSize(0, 0);
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iFrameImageData->iBitsPerSample = 0;
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iFrameImageData->iSamplesPerPixel = 0;
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iFrameImageData->iCompression = 0;
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iFrameImageData->iT4Options = 0;
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iFrameImageData->iT6Options = 0;
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iFrameImageData->iPhotometricInterpretation = 0;
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iFrameImageData->iFillOrder = 0;
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iFrameImageData->iWidthInTwips = 0.0;
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iFrameImageData->iHeightInTwips = 0.0;
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iFrameImageData->iRowsPerStrip = 0;
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iFrameImageData->iNumStrips = 0;
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iFrameImageData->iStripInfo = NULL;
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}
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TInt err = KErrNone;
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FOREVER
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{
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switch(iProcessHeaderState)
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{
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case EReadIfd:
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if (!iRecordTable)
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{
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iRecordTable = CRecordTable::NewL();
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}
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iIfdSize = 0;
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iIfdOffset = iPlugin.CurrentFilePosition();
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err = ReadIfdL(ptr, ptrLimit, iIfdSize);
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if (err != KErrNone)
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{
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return EFrameIncomplete;
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}
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if (iLongValuesSize)
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{
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iProcessHeaderState = EReadLongValues;
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aData.Shift(aData.Length());
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iNewPosition = iLongValuesStartOffset;
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return EFrameIncompleteRepositionRequest;
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}
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iProcessHeaderState = EProcessIfd;
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break;
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case EReadLongValues:
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err = ReadLongValuesL(ptr, ptrLimit);
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aData.Shift(ptr-ptrStart);
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if (err != KErrNone)
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return EFrameIncomplete;
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iProcessHeaderState = EProcessIfd;
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break;
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case EProcessIfd:
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ProcessIfdL();
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aData.Shift(aData.Length());
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iProcessHeaderState = EFinish;
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break;
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case EFinish:
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{
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err = iRecordTable->InsertRecordL(iIfdOffset, iIfdSize);
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if (err != KErrNone && err != KErrAlreadyExists)
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{
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User::Leave(KErrCorrupt);
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}
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iIfdOffset = 0;
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iIfdSize = 0;
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// Check that we got strip info.
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if (iFrameImageData->iStripInfo == NULL)
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User::Leave(KErrCorrupt);
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err = iImageData->AppendImageBuffer(iFrameImageData->iStripInfo);
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if (err != KErrNone)
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{
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delete iFrameImageData->iStripInfo;
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delete iFrameImageData;
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iFrameImageData = NULL;
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User::Leave(err);
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}
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err = iImageData->AppendFrameData(iFrameImageData);
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if(err != KErrNone)
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{
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delete iFrameImageData;
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iFrameImageData = NULL;
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User::Leave(err);
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}
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iImageInfo->iFrameCoordsInPixels = iFrameImageData->iSizeInPixels;
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iImageInfo->iOverallSizeInPixels = iFrameImageData->iSizeInPixels;
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iImageInfo->iFrameSizeInTwips.SetSize(STATIC_CAST(TInt, iFrameImageData->iWidthInTwips), STATIC_CAST(TInt, iFrameImageData->iHeightInTwips));
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iImageInfo->iBitsPerPixel = 1;
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iImageInfo->iFrameDisplayMode = EGray2;
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iImageInfo->iDelay = 0;
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iImageInfo->iFlags = TFrameInfo::EPartialDecodeInvalid;
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// in all of the test files we've seen, the frame info follows the frame data
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// so it has not been possible to check to see if it would work
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// If this has changed, visit commented out ClearBitmap above
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iImageInfo->SetFrameDataOffset(iStripInfo[0].iOffset - iFormatInfo.iFirstIfd);
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iFrameImageData = NULL;
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iImageInfo->SetCurrentFrameState(TFrameInfo::EFrameInfoProcessingComplete);
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if (iNextIfdOffset == 0)
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{
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delete iRecordTable;
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iRecordTable = NULL;
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return EFrameComplete;
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}
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else
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{
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iNewPosition = iNextIfdOffset;
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return EFrameIncompleteRepositionRequest;
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}
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}
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default:
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Panic(EUnknownHeaderState);
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}
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}
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}
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TInt CTiffReadCodec::ReadIfdL(const TUint8*& aPtr, const TUint8* aPtrLimit, TInt& aIfdSizeInBytes)
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{
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const TUint8* ptr = aPtr;
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if (ptr + 4 > aPtrLimit)
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return(KErrUnderflow);
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iNumIfdEntries = iValueReader.ReadUint16(ptr);
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ptr += 2;
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if (ptr + iNumIfdEntries * KTiffIfdEntryLength + 4 > aPtrLimit)
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return(KErrUnderflow);
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aIfdSizeInBytes = iNumIfdEntries * sizeof(TTiffIfdEntry);
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if (iIfdBuffer)
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{
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if (iIfdBuffer->Length() < aIfdSizeInBytes)
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{
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delete iIfdBuffer;
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iIfdBuffer = NULL;
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}
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}
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if (!iIfdBuffer)
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iIfdBuffer = HBufC8::NewMaxL(aIfdSizeInBytes);
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TTiffIfdEntry* entry = REINTERPRET_CAST(TTiffIfdEntry*, CONST_CAST(TUint8*, iIfdBuffer->Des().Ptr()));
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iIfdEntries = entry;
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for (TInt i = 0; i < iNumIfdEntries; i++)
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{
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ReadIfdEntryL(*entry, ptr);
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entry++;
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ptr += KTiffIfdEntryLength;
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}
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iNextIfdOffset = iValueReader.ReadUint32(ptr);
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aPtr = ptr + 4;
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if (iLongValuesStartOffset < iLongValuesEndOffset)
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iLongValuesSize = iLongValuesEndOffset - iLongValuesStartOffset;
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else
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iLongValuesSize = 0;
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return(KErrNone);
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}
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void CTiffReadCodec::ReadIfdEntryL(TTiffIfdEntry& aEntry, const TUint8*const aPtr)
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{
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aEntry.iId = STATIC_CAST(TTiffIfdEntry::TId, iValueReader.ReadUint16(aPtr + KTiffIfdEntryTagOffset));
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aEntry.iType = STATIC_CAST(TTiffIfdEntry::TType, iValueReader.ReadUint16(aPtr + KTiffIfdEntryTypeOffset));
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aEntry.iCount = iValueReader.ReadUint32(aPtr + KTiffIfdEntryCountOffset);
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const TInt valueSize = aEntry.TypeSize()*aEntry.iCount;
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if (valueSize <= 4)
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{
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// read as if TUint32* - equiv to Mem::Copy(&aEntry.iValue, aPtr+KTiffIfdEntryValueOffset, 4);
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aEntry.iValue = PtrReadUtil::ReadUint32(aPtr+KTiffIfdEntryValueOffset);
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aEntry.iValuePtr = REINTERPRET_CAST(TUint8*, &aEntry.iValue);
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}
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else
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{
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TInt valueOffset = iValueReader.ReadUint32(aPtr + KTiffIfdEntryValueOffset);
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aEntry.iValue = valueOffset;
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aEntry.iValuePtr = NULL;
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if (valueOffset < iLongValuesStartOffset)
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iLongValuesStartOffset = valueOffset;
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if (valueOffset + valueSize > iLongValuesEndOffset)
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iLongValuesEndOffset = valueOffset + valueSize;
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}
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}
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TInt CTiffReadCodec::ReadLongValuesL(const TUint8*& aPtr, const TUint8*const aPtrLimit)
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{
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if(!iLoadedLongValuesSize)
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{
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if (iLongValuesSize<0)
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User::Leave(KErrCorrupt);
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if (iLongValuesSize>=(KMaxTInt/2)) // User alloc limit.
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User::Leave(KErrNoMemory);
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if (iLongValuesBuffer)
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{
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if (iLongValuesBuffer->Length() < iLongValuesSize)
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{
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delete iLongValuesBuffer;
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iLongValuesBuffer = NULL;
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}
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}
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if (!iLongValuesBuffer)
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iLongValuesBuffer = HBufC8::NewMaxL(iLongValuesSize);
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iLongValues = CONST_CAST(TUint8*, iLongValuesBuffer->Des().Ptr());
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}
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TInt size = iLongValuesSize - iLoadedLongValuesSize;
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if (aPtr+size>aPtrLimit)
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size = aPtrLimit-aPtr;
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Mem::Copy(iLongValues + iLoadedLongValuesSize, aPtr, size);
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aPtr += size;
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iLoadedLongValuesSize += size;
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if (iLoadedLongValuesSize!=iLongValuesSize)
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return(KErrUnderflow);
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TTiffIfdEntry* entry = iIfdEntries;
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for(TInt i = 0 ; i < iNumIfdEntries; i+=1)
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{
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if (!entry->iValuePtr)
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{
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TInt entryPos = entry->iValue-iLongValuesStartOffset;
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if ((entryPos<0) || (entryPos>=iLongValuesSize))
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User::Leave(KErrCorrupt);
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TInt valueSize = entry->TypeSize()*entry->iCount;
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if ((entryPos+valueSize)>iLongValuesSize)
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User::Leave(KErrCorrupt);
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entry->iValuePtr = iLongValues+entryPos;
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}
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entry++;
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}
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return(KErrNone);
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}
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void CTiffReadCodec::ProcessIfdL()
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{
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TTiffIfdEntry* entry = iIfdEntries;
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for (TInt i = 0; i < iNumIfdEntries; i+=1)
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{
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369 |
ProcessIfdEntryL(*entry);
|
|
|
370 |
entry++;
|
|
|
371 |
}
|
|
|
372 |
}
|
|
|
373 |
|
|
|
374 |
void CTiffReadCodec::ProcessIfdEntryL(const TTiffIfdEntry& aEntry)
|
|
|
375 |
{
|
|
|
376 |
switch(aEntry.iId)
|
|
|
377 |
{
|
|
|
378 |
case TTiffIfdEntry::ENewSubfileType:
|
|
|
379 |
|
|
|
380 |
iFrameImageData->iNewSubfileType = IntegerIfdEntryValueL(aEntry);
|
|
|
381 |
break;
|
|
|
382 |
|
|
|
383 |
case TTiffIfdEntry::ESubfileType:
|
|
|
384 |
{
|
|
|
385 |
TUint32 type = IntegerIfdEntryValueL(aEntry) - 1; //Convert SubfileType to NewSubfileType
|
|
|
386 |
if (type < 3)
|
|
|
387 |
iFrameImageData->iNewSubfileType = type;
|
|
|
388 |
}
|
|
|
389 |
break;
|
|
|
390 |
|
|
|
391 |
case TTiffIfdEntry::EImageWidth:
|
|
|
392 |
|
|
|
393 |
iFrameImageData->iSizeInPixels.iWidth = IntegerIfdEntryValueL(aEntry);
|
|
|
394 |
if (iFrameImageData->iSizeInPixels.iWidth<0)
|
|
|
395 |
User::Leave(KErrCorrupt);
|
|
|
396 |
break;
|
|
|
397 |
|
|
|
398 |
case TTiffIfdEntry::EImageLength:
|
|
|
399 |
|
|
|
400 |
iFrameImageData->iSizeInPixels.iHeight = IntegerIfdEntryValueL(aEntry);
|
|
|
401 |
if (iFrameImageData->iSizeInPixels.iHeight<0)
|
|
|
402 |
User::Leave(KErrCorrupt);
|
|
|
403 |
break;
|
|
|
404 |
|
|
|
405 |
case TTiffIfdEntry::EBitsPerSample:
|
|
|
406 |
|
|
|
407 |
iFrameImageData->iBitsPerSample = IntegerIfdEntryValueL(aEntry);
|
|
|
408 |
break;
|
|
|
409 |
|
|
|
410 |
case TTiffIfdEntry::ECompression:
|
|
|
411 |
|
|
|
412 |
iFrameImageData->iCompression = IntegerIfdEntryValueL(aEntry);
|
|
|
413 |
break;
|
|
|
414 |
|
|
|
415 |
case TTiffIfdEntry::EPhotometricInterpretation:
|
|
|
416 |
|
|
|
417 |
iFrameImageData->iPhotometricInterpretation = IntegerIfdEntryValueL(aEntry);
|
|
|
418 |
break;
|
|
|
419 |
|
|
|
420 |
case TTiffIfdEntry::EFillOrder:
|
|
|
421 |
|
|
|
422 |
iFrameImageData->iFillOrder = IntegerIfdEntryValueL(aEntry);
|
|
|
423 |
break;
|
|
|
424 |
|
|
|
425 |
case TTiffIfdEntry::EStripOffsets:
|
|
|
426 |
{
|
|
|
427 |
if (aEntry.iCount<=0)
|
|
|
428 |
User::Leave(KErrCorrupt);
|
|
|
429 |
iFrameImageData->iNumStrips = aEntry.iCount;
|
|
|
430 |
|
|
|
431 |
TInt stripBytes = iFrameImageData->iNumStrips * sizeof(TTiffImageStrip);
|
|
|
432 |
if ((stripBytes<0) || (stripBytes>=(KMaxTInt/2))) // User alloc limit.
|
|
|
433 |
User::Leave(KErrNoMemory);
|
|
|
434 |
|
|
|
435 |
ASSERT(iFrameImageData->iStripInfo==NULL);
|
|
|
436 |
iFrameImageData->iStripInfo = HBufC8::NewMaxL(stripBytes);
|
|
|
437 |
|
|
|
438 |
TInt i;
|
|
|
439 |
TPtr8 stripInfoPtr(iFrameImageData->iStripInfo->Des());
|
|
|
440 |
iStripInfo = REINTERPRET_CAST(TTiffImageStrip*, CONST_CAST(TUint8*, stripInfoPtr.Ptr()));
|
|
|
441 |
for(i = 0; i < iFrameImageData->iNumStrips; i++)
|
|
|
442 |
iStripInfo[i].iOffset = IntegerIfdEntryValueL(aEntry,i);
|
|
|
443 |
}
|
|
|
444 |
break;
|
|
|
445 |
|
|
|
446 |
case TTiffIfdEntry::ESamplesPerPixel:
|
|
|
447 |
|
|
|
448 |
iFrameImageData->iSamplesPerPixel = IntegerIfdEntryValueL(aEntry);
|
|
|
449 |
break;
|
|
|
450 |
|
|
|
451 |
case TTiffIfdEntry::ERowsPerStrip:
|
|
|
452 |
|
|
|
453 |
iFrameImageData->iRowsPerStrip = IntegerIfdEntryValueL(aEntry);
|
|
|
454 |
break;
|
|
|
455 |
|
|
|
456 |
case TTiffIfdEntry::EStripByteCounts:
|
|
|
457 |
{
|
|
|
458 |
TInt i;
|
|
|
459 |
for(i = 0; i < iFrameImageData->iNumStrips; i++)
|
|
|
460 |
iStripInfo[i].iLength = IntegerIfdEntryValueL(aEntry, i);
|
|
|
461 |
}
|
|
|
462 |
break;
|
|
|
463 |
|
|
|
464 |
case TTiffIfdEntry::EXResolution:
|
|
|
465 |
{
|
|
|
466 |
TReal resolution = RationalIfdEntryValueL(aEntry);
|
|
|
467 |
if (resolution != 0)
|
|
|
468 |
iFrameImageData->iWidthInTwips = STATIC_CAST(TReal, iFrameImageData->iSizeInPixels.iWidth) * STATIC_CAST(TReal, KTwipsPerInch) / resolution;
|
|
|
469 |
}
|
|
|
470 |
break;
|
|
|
471 |
|
|
|
472 |
case TTiffIfdEntry::EYResolution:
|
|
|
473 |
{
|
|
|
474 |
TReal resolution = RationalIfdEntryValueL(aEntry);
|
|
|
475 |
if (resolution != 0)
|
|
|
476 |
iFrameImageData->iHeightInTwips = STATIC_CAST(TReal, iFrameImageData->iSizeInPixels.iHeight) * STATIC_CAST(TReal, KTwipsPerInch) / resolution;
|
|
|
477 |
}
|
|
|
478 |
break;
|
|
|
479 |
|
|
|
480 |
case TTiffIfdEntry::ET4Options:
|
|
|
481 |
|
|
|
482 |
iFrameImageData->iT4Options = IntegerIfdEntryValueL(aEntry);
|
|
|
483 |
break;
|
|
|
484 |
|
|
|
485 |
case TTiffIfdEntry::ET6Options:
|
|
|
486 |
|
|
|
487 |
iFrameImageData->iT6Options = IntegerIfdEntryValueL(aEntry);
|
|
|
488 |
break;
|
|
|
489 |
|
|
|
490 |
case TTiffIfdEntry::EResolutionUnit:
|
|
|
491 |
|
|
|
492 |
if (IntegerIfdEntryValueL(aEntry) == 3) // Resolution units are centimeters rather than inches
|
|
|
493 |
{
|
|
|
494 |
const TReal KInchesPerCentimeter = 1.0 / 2.54;
|
|
|
495 |
iFrameImageData->iWidthInTwips *= KInchesPerCentimeter;
|
|
|
496 |
iFrameImageData->iHeightInTwips *= KInchesPerCentimeter;
|
|
|
497 |
}
|
|
|
498 |
break;
|
|
|
499 |
|
|
|
500 |
default:
|
|
|
501 |
break;
|
|
|
502 |
}
|
|
|
503 |
}
|
|
|
504 |
|
|
|
505 |
TInt CTiffReadCodec::IntegerIfdEntryValueL(const TTiffIfdEntry& aEntry, TInt aIndex) const
|
|
|
506 |
{
|
|
|
507 |
if (aIndex >= aEntry.iCount)
|
|
|
508 |
User::Leave(KErrCorrupt);
|
|
|
509 |
|
|
|
510 |
TUint8* ptr = aEntry.iValuePtr;
|
|
|
511 |
|
|
|
512 |
switch(aEntry.iType)
|
|
|
513 |
{
|
|
|
514 |
case TTiffIfdEntry::EByte:
|
|
|
515 |
return(ptr[aIndex]);
|
|
|
516 |
|
|
|
517 |
case TTiffIfdEntry::ESbyte:
|
|
|
518 |
return(STATIC_CAST(TInt8, ptr[aIndex]));
|
|
|
519 |
|
|
|
520 |
case TTiffIfdEntry::EShort:
|
|
|
521 |
return(iValueReader.ReadUint16(ptr + aIndex * 2));
|
|
|
522 |
|
|
|
523 |
case TTiffIfdEntry::ESshort:
|
|
|
524 |
return(iValueReader.ReadInt16(ptr + aIndex * 2));
|
|
|
525 |
|
|
|
526 |
case TTiffIfdEntry::ELong:
|
|
|
527 |
return(iValueReader.ReadUint32(ptr + aIndex * 4));
|
|
|
528 |
|
|
|
529 |
case TTiffIfdEntry::ESlong:
|
|
|
530 |
return(iValueReader.ReadInt32(ptr + aIndex * 4));
|
|
|
531 |
|
|
|
532 |
default:
|
|
|
533 |
User::Leave(KErrCorrupt);
|
|
|
534 |
return(0);
|
|
|
535 |
}
|
|
|
536 |
}
|
|
|
537 |
|
|
|
538 |
TInt CTiffReadCodec::IntegerIfdEntryValueL(const TTiffIfdEntry& aEntry) const
|
|
|
539 |
{
|
|
|
540 |
if (aEntry.iCount != 1)
|
|
|
541 |
User::Leave(KErrCorrupt);
|
|
|
542 |
|
|
|
543 |
return(IntegerIfdEntryValueL(aEntry, 0));
|
|
|
544 |
}
|
|
|
545 |
|
|
|
546 |
TReal CTiffReadCodec::RationalIfdEntryValueL(const TTiffIfdEntry& aEntry) const
|
|
|
547 |
{
|
|
|
548 |
if (aEntry.iCount != 1)
|
|
|
549 |
User::Leave(KErrCorrupt);
|
|
|
550 |
|
|
|
551 |
TUint8* ptr = aEntry.iValuePtr;
|
|
|
552 |
|
|
|
553 |
switch(aEntry.iType)
|
|
|
554 |
{
|
|
|
555 |
|
|
|
556 |
case TTiffIfdEntry::ERational:
|
|
|
557 |
{
|
|
|
558 |
TInt numerator = iValueReader.ReadUint32(ptr);
|
|
|
559 |
TInt denominator = iValueReader.ReadUint32(ptr + 4);
|
|
|
560 |
if (!denominator)
|
|
|
561 |
User::Leave(KErrCorrupt);
|
|
|
562 |
return(STATIC_CAST(TReal, numerator) / STATIC_CAST(TReal, denominator));
|
|
|
563 |
}
|
|
|
564 |
|
|
|
565 |
default:
|
|
|
566 |
User::Leave(KErrCorrupt);
|
|
|
567 |
return(0);
|
|
|
568 |
|
|
|
569 |
}
|
|
|
570 |
|
|
|
571 |
}
|
|
|
572 |
void CTiffReadCodec::InitFrameL(TFrameInfo& aFrameInfo, CFrameImageData& aFrameImageData, TBool aDisableErrorDiffusion, CFbsBitmap& aBitmap, CFbsBitmap* /*aDestinationMask*/)
|
|
|
573 |
{
|
|
|
574 |
iImageInfo = &aFrameInfo;
|
|
|
575 |
iImageData = &aFrameImageData;
|
|
|
576 |
iTiffImageData = STATIC_CAST(TTiffImageData*, iImageData->GetFrameData(0));
|
|
|
577 |
|
|
|
578 |
TPtr8 stripInfoPtr(iTiffImageData->iStripInfo->Des());
|
|
|
579 |
iStripInfo = REINTERPRET_CAST(TTiffImageStrip*, CONST_CAST(TUint8*, stripInfoPtr.Ptr()));
|
|
|
580 |
|
|
|
581 |
delete iDecoder;
|
|
|
582 |
iDecoder = NULL;
|
|
|
583 |
|
|
|
584 |
switch(iTiffImageData->iCompression)
|
|
|
585 |
{
|
|
|
586 |
case TTiffIfdEntry::EGroup3FaxCompression:
|
|
|
587 |
|
|
|
588 |
if (iTiffImageData->iT4Options & TTiffIfdEntry::ET4TwoDimentionalCoding)
|
|
|
589 |
iDecoder = CTiffGroup3Fax2dDecoder::NewL(*iTiffImageData);
|
|
|
590 |
else
|
|
|
591 |
iDecoder = CTiffGroup3Fax1dDecoder::NewL(*iTiffImageData);
|
|
|
592 |
break;
|
|
|
593 |
|
|
|
594 |
case TTiffIfdEntry::EGroup4FaxCompression:
|
|
|
595 |
|
|
|
596 |
iDecoder = CTiffGroup4FaxDecoder::NewL(*iTiffImageData);
|
|
|
597 |
break;
|
|
|
598 |
|
|
|
599 |
default:
|
|
|
600 |
User::Leave(KErrNotSupported);
|
|
|
601 |
break;
|
|
|
602 |
}
|
|
|
603 |
|
|
|
604 |
const TSize destinationSize(aBitmap.SizeInPixels());
|
|
|
605 |
TInt reductionFactor = ReductionFactor(iImageInfo->iOverallSizeInPixels, destinationSize);
|
|
|
606 |
iDecoder->DoNewFrameL(aBitmap, aDisableErrorDiffusion, reductionFactor);
|
|
|
607 |
|
|
|
608 |
// ClearBitmapL(aBitmap, KRgbWhite);
|
|
|
609 |
// No need to do something sensible when we do partial decodes on streaming
|
|
|
610 |
// as tiff cannot return a partial image
|
|
|
611 |
|
|
|
612 |
iCurrentStrip = 0;
|
|
|
613 |
iNewStrip = ETrue;
|
|
|
614 |
}
|
|
|
615 |
|
|
|
616 |
void CTiffReadCodec::NewStripL()
|
|
|
617 |
{
|
|
|
618 |
iNewStrip = EFalse;
|
|
|
619 |
iDecoder->NewStripL(iStripInfo[iCurrentStrip].iLength);
|
|
|
620 |
}
|
|
|
621 |
|
|
|
622 |
TFrameState CTiffReadCodec::ProcessFrameL(TBufPtr8& aSrc)
|
|
|
623 |
{
|
|
|
624 |
if (iNewStrip)
|
|
|
625 |
NewStripL();
|
|
|
626 |
|
|
|
627 |
if (!iDecoder->ProcessStripL(&aSrc))
|
|
|
628 |
return(EFrameIncomplete);
|
|
|
629 |
|
|
|
630 |
iCurrentStrip++;
|
|
|
631 |
if (iCurrentStrip >= iTiffImageData->iNumStrips)
|
|
|
632 |
return (EFrameComplete);
|
|
|
633 |
|
|
|
634 |
iNewStrip = ETrue;
|
|
|
635 |
iNewPosition = iStripInfo[iCurrentStrip].iOffset;
|
|
|
636 |
|
|
|
637 |
return(EFrameIncompleteRepositionRequest);
|
|
|
638 |
}
|
|
|
639 |
|
|
|
640 |
void CTiffReadCodec::GetNewDataPosition(TInt& aPosition, TInt& /* aLength */ )
|
|
|
641 |
{
|
|
|
642 |
aPosition = iNewPosition;
|
|
|
643 |
}
|
|
|
644 |
|
|
|
645 |
|
|
|
646 |
// TTiffIfdEntry.
|
|
|
647 |
TInt TTiffIfdEntry::TypeSize() const
|
|
|
648 |
{
|
|
|
649 |
switch(iType)
|
|
|
650 |
{
|
|
|
651 |
case EByte:
|
|
|
652 |
case ESbyte:
|
|
|
653 |
case EAscii:
|
|
|
654 |
case EUndefined:
|
|
|
655 |
return(1);
|
|
|
656 |
case EShort:
|
|
|
657 |
case ESshort:
|
|
|
658 |
return(2);
|
|
|
659 |
case ELong:
|
|
|
660 |
case ESlong:
|
|
|
661 |
case EFloat:
|
|
|
662 |
return(4);
|
|
|
663 |
case ERational:
|
|
|
664 |
case ESrational:
|
|
|
665 |
case EDouble:
|
|
|
666 |
return(8);
|
|
|
667 |
default:
|
|
|
668 |
return(0);
|
|
|
669 |
}
|
|
|
670 |
}
|
|
|
671 |
|