--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mmplugins/imagingplugins/codecs/PNGCodec/PngDecoderFactory.cpp	Tue Feb 02 01:56:55 2010 +0200
@@ -0,0 +1,293 @@
+// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#include <ecom/ecom.h>
+#include "PNGCodec.h"
+
+#include "PngDecoderFactory.h"
+
+
+
+/*static*/
+MImageStreamDecoderFactory* CPngImageStreamDecoderFactory::NewL()
+	{
+	return static_cast<MImageStreamDecoderFactory*>(new (ELeave) CPngImageStreamDecoderFactory());
+	}
+
+
+CPngImageStreamDecoderFactory::CPngImageStreamDecoderFactory()
+	{
+	}
+
+CPngImageStreamDecoderFactory::~CPngImageStreamDecoderFactory()
+	{
+	REComSession::DestroyedImplementation(iDtorKey);
+	}
+
+// MImageStreamDecoderFactory // 
+void CPngImageStreamDecoderFactory::SetDtorKey(TUid aUid)
+	{
+	iDtorKey = aUid;
+	}
+
+void CPngImageStreamDecoderFactory::Release()
+	{
+	ASSERT(iDtorKey.iUid);
+	delete this;
+	}
+
+class CPngImage: protected CPngReadCodec, protected MPngDecoder, public MImageStreamDecoder 
+	{
+public:
+	static CPngImage* NewL();
+
+//  from the MImageStreamDecoder //
+	virtual void InitL(CImageProcessor& aImageProcessor, CImageProcessor* aMaskProcessor, CFbsBitmap* aDestination, 
+						const TPtrC8& aData, MUniqueChunkDataProvider& aProvider);
+	virtual void DecodeL();
+	virtual void ResetL();
+	virtual void Release();
+	virtual const TSize& ImageSize();	
+
+protected:
+	CPngImage();
+
+	virtual void DoProcessPLTEL(const TUint8* aDataPtr,TInt aChunkLength);
+	virtual void DoProcesstRNSL(const TUint8* aDataPtr,TInt aChunkLength);
+	virtual void DoProcessbKGDL(const TUint8* aDataPtr,TInt aChunkLength);
+	virtual void DoProcesspHYsL(const TUint8* aDataPtr,TInt aChunkLength);
+
+	void InitFrameL();
+// from the MPngDecoder  //
+	void GoToProcessDataState();
+	
+protected:
+	CPngImage(const TBufPtr8& aData);
+	TFrameInfo iFrameInfo;
+	TBufPtr8 iCurrentData;
+	TBufPtr8 iData;
+	MUniqueChunkDataProvider* iChunkProvider;
+	TBool iDataProcessing;
+	TBool ibKGDChunkFound;
+	TBool ipHYsChunkFound;
+	TBool itRNSChunkFound;
+	CFbsBitmap* iCurrentFrame; //destination bitmap; not owned.
+	};
+
+/*static*/
+CPngImage* CPngImage::NewL()
+	{
+	return new (ELeave) CPngImage();
+	}
+
+CPngImage::CPngImage():CPngReadCodec(static_cast<MPngDecoder&>(*this))
+	{
+	}
+
+void CPngImage::Release()
+	{
+	delete this;
+	}
+
+void CPngImage::GoToProcessDataState()
+	{
+	iDataProcessing = ETrue;
+	}
+
+void CPngImage::InitL(CImageProcessor& aImageProcessor, CImageProcessor* aMaskProcessor, CFbsBitmap* aDestination,
+						const TPtrC8& aData, MUniqueChunkDataProvider& aProvider)
+	{
+	CPngReadCodec::ConstructL();
+	iCurrentFrame = aDestination;
+	SetImageProcessor(&aImageProcessor, EFalse);
+	if (NULL != aMaskProcessor)
+		{
+		SetMaskProcessor(aMaskProcessor, EFalse);
+		}
+	iCurrentData.Set(aData);
+	iData.Set(aData);
+	iChunkProvider = &aProvider;
+
+	TFrameInfo inf; 
+	inf.SetCurrentFrameState(TFrameInfo::EFrameInfoUninitialised);
+	CFrameImageData* DummyData=NULL;
+	InitFrameHeader(inf, *DummyData );
+	ProcessFrameHeaderL( iCurrentData );
+	if (!ibKGDChunkFound)
+		{
+		const TUint8* Ptr;
+		TInt ChunkLength;
+		if (KErrNone == iChunkProvider->GetChunkData(KPngbKGDChunkId().Ptr(), Ptr, ChunkLength))
+			{
+			DoProcessbKGDL(Ptr, ChunkLength);
+			}
+		}
+	if (!ipHYsChunkFound)
+		{
+		const TUint8* Ptr;
+		TInt ChunkLength;
+		if (KErrNone == iChunkProvider->GetChunkData(KPngpHYsChunkId().Ptr(), Ptr, ChunkLength))
+			{
+			DoProcesspHYsL(Ptr, ChunkLength);
+			}
+		}
+	InitFrameL();
+	}
+
+void CPngImage::ResetL()
+	{
+	iCurrentData.Set(iData);
+	iDataProcessing = EFalse;
+	ibKGDChunkFound = EFalse;
+	ipHYsChunkFound	= EFalse;
+	itRNSChunkFound = EFalse;
+	InitFrameL();
+	}
+
+const TSize& CPngImage::ImageSize()
+	{
+	return iImageInfo.iSize;
+	}
+
+void CPngImage::DoProcessPLTEL(const TUint8* aDataPtr,TInt aChunkLength)
+	{
+	if (0 == aChunkLength)
+		{
+		const TUint8* Plte;
+		if (KErrNone == iChunkProvider->GetChunkData(KPngPLTEChunkId().Ptr(), Plte, aChunkLength))
+			{
+			// try to get inherited tRNS as well...
+			const TUint8* Trns;
+			TInt TrnsLen=0;
+			if (!itRNSChunkFound && KErrNone == iChunkProvider->GetChunkData(KPngtRNSChunkId().Ptr(), Trns, TrnsLen))
+				{
+				CPngReadCodec::DoProcesstRNSL(Trns, TrnsLen); 
+				}
+			aDataPtr = Plte;
+			}
+		}
+	CPngReadCodec::DoProcessPLTEL(aDataPtr, aChunkLength);
+	}
+
+void CPngImage::DoProcesstRNSL(const TUint8* aDataPtr,TInt aChunkLength)
+	{
+	if (0 == aChunkLength)
+		{
+		const TUint8* Trns;
+		if (KErrNone == iChunkProvider->GetChunkData(KPngtRNSChunkId().Ptr(), Trns, aChunkLength))
+			{
+			aDataPtr = Trns;
+			}
+		}
+	itRNSChunkFound = (0 != aChunkLength);
+	CPngReadCodec::DoProcesstRNSL(aDataPtr,aChunkLength);
+	}
+
+void CPngImage::DoProcessbKGDL(const TUint8* aDataPtr,TInt aChunkLength)
+	{
+	if (0 == aChunkLength || ibKGDChunkFound)
+		{
+		User::Leave(KErrCorrupt);
+		}
+	ibKGDChunkFound = ETrue;
+	CPngReadCodec::DoProcessbKGDL(aDataPtr,aChunkLength);
+	}
+
+void CPngImage::DoProcesspHYsL(const TUint8* aDataPtr,TInt aChunkLength)
+	{
+	if (0 == aChunkLength || ipHYsChunkFound)
+		{
+		User::Leave(KErrCorrupt);
+		}
+	ipHYsChunkFound = ETrue;
+	CPngReadCodec::DoProcessbKGDL(aDataPtr,aChunkLength);
+	}
+
+void CPngImage::InitFrameL()
+	{
+	iChunkBytesRemaining = 0;
+	iChunkId = KNullDesC8;
+
+		
+	if (iDecoder == NULL) 
+		{	
+		TBool fastProcessorMode = EFalse;
+		CFastProcessor* fastProc = NULL;
+		SetFastProcessor(NULL);
+		
+		/*Check if Image processor is to be ignored. 
+		Ignore Image processor only when decoding 24 or 32 bpp images.
+		In case of non interlaced images and if destination and source height/width differ then don't skip Image processor.
+		*/
+		if (((iImageInfo.iBitDepth == 8) && (iImageInfo.iColorType == TPngImageInformation::EDirectColor || iImageInfo.iColorType == TPngImageInformation::EAlphaDirectColor)) && (iImageInfo.iInterlaceMethod == TPngImageInformation::ENoInterlace) && (iImageInfo.iTransparencyPresent == EFalse ))
+			{
+			
+			CFbsBitmap* destBitmap=NULL;		
+			
+			fastProc = CFastProcessor::NewL(iImageInfo, destBitmap, NULL, ETrue);
+			SetFastProcessor(fastProc);
+			fastProcessorMode = ETrue;
+			}
+		
+		iDecoder = CPngReadSubCodec::NewL(ImageProcessor(), MaskProcessor(), iImageInfo , FastProcessor(), fastProcessorMode);
+		iDecoder->SetRgbaMode(ETrue);		
+		}
+
+	if (iDecompressor == NULL)
+		{
+		iDecompressor = CEZDecompressor::NewL(*this);
+		}
+		
+	}
+
+void CPngImage::DecodeL()
+	{
+	const TPoint ZeroPoint(0,0);
+	const TRect ImageRect(ZeroPoint, ImageSize().AsPoint());
+
+	if ((iImageInfo.iTransparencyPresent || (iImageInfo.iColorType & TPngImageInformation::EAlphaChannelUsed))
+		 && MaskProcessor() )
+		{		
+		
+		MaskProcessor()->PrepareL(*iCurrentFrame, ImageRect);
+		MaskProcessor()->SetPos(ZeroPoint);
+		}
+
+	ImageProcessor()->PrepareL(*iCurrentFrame, ImageRect);
+	ImageProcessor()->SetPos(ZeroPoint);
+
+	while (EFrameIncomplete == ProcessFrameL( iCurrentData )) 
+		{
+		if (iDataProcessing)
+			{
+			while (  ! DoProcessDataL() ) 
+				{
+				(void)0;
+				}
+			}
+		iDataProcessing = EFalse;
+		}
+	delete iDecompressor;
+	iDecompressor=NULL;
+	iDecoder->ResetL();
+	}
+
+// MImageStreamDecoderFactory // 
+void CPngImageStreamDecoderFactory::CreatePngDecoderL(MImageStreamDecoder*& aPtr)
+	{
+	aPtr = NULL;
+	aPtr = static_cast<MImageStreamDecoder*>(  CPngImage::NewL() );
+	}
+