--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imaging/imagingfws/ImageDisplay/plugins/IclWrapper/ImagePostprocess.cpp	Wed Aug 25 12:29:52 2010 +0300
@@ -0,0 +1,343 @@
+// Copyright (c) 2005-2009 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:
+//
+
+/** 	@file
+	@internalComponent */
+#include <bitmaptransforms.h>
+#include <icl/imagedisplayplugin.h>
+#include "MiscUtils.h"
+
+#include "ImagePostprocess.h"
+
+/*static*/
+CAsyncTransformer* CAsyncTransformer::NewL(MPostProcessObserver& aObserver,CTransformerSharedData& aSingleton,
+										   const TSize& aDestSize)
+	{
+	return new (ELeave) CAsyncTransformer(aObserver, aSingleton, aDestSize);
+	}
+
+CAsyncTransformer::CAsyncTransformer(MPostProcessObserver& aObserver, CTransformerSharedData& aSingleton, const TSize& aDestSize):
+														CActive(EPriorityNormal),
+														iObserver(aObserver),
+														iSingleton(&aSingleton),
+														iDestSize(aDestSize),
+														iScaleQuality(CBitmapScaler::EMinimumQuality)
+														
+	{
+	iSingleton->AddRef();
+	CActiveScheduler::Add(this);
+	}
+
+CAsyncTransformer::~CAsyncTransformer()
+	{
+	Cleanup();
+	iSingleton->Release();
+	iSingleton = NULL;
+	delete iScaleDest;
+	delete iTransformDest;
+	}
+
+TInt CAsyncTransformer::RunError(TInt aError)
+	{
+	iResultStatus = aError;
+	iObserver.OnTransformDone(aError);
+	return KErrNone;
+	}
+
+TInt CAsyncTransformer::NextTransform(TUint& aTransFormTodo1)
+	{
+	if ((aTransFormTodo1&CImageDisplay::EOptionRotateCw90)==CImageDisplay::EOptionRotateCw90)
+		{
+		aTransFormTodo1 ^= CImageDisplay::EOptionRotateCw90;
+		return CBitmapRotator::ERotation90DegreesClockwise;
+		}
+
+	if ((aTransFormTodo1&CImageDisplay::EOptionRotateCw180)==CImageDisplay::EOptionRotateCw180)
+		{
+		aTransFormTodo1 ^= CImageDisplay::EOptionRotateCw180;
+		return CBitmapRotator::ERotation180DegreesClockwise;
+		}
+
+	if ((aTransFormTodo1&CImageDisplay::EOptionRotateCw270)==CImageDisplay::EOptionRotateCw270)
+		{
+		aTransFormTodo1 ^= CImageDisplay::EOptionRotateCw270;
+		return CBitmapRotator::ERotation270DegreesClockwise;
+		}
+	
+	if ((aTransFormTodo1&CImageDisplay::EOptionMirrorVertical)==CImageDisplay::EOptionMirrorVertical)
+		{
+		aTransFormTodo1 ^= CImageDisplay::EOptionMirrorVertical;
+		return CBitmapRotator::EMirrorVerticalAxis;
+		}
+
+	if ((aTransFormTodo1&CImageDisplay::EOptionMirrorHorizontal)==CImageDisplay::EOptionMirrorHorizontal)
+		{
+		aTransFormTodo1 ^= CImageDisplay::EOptionMirrorHorizontal;
+		return CBitmapRotator::EMirrorHorizontalAxis;
+		}
+	
+	ASSERT(EFalse);
+	return -1;
+	}
+
+void CAsyncTransformer::RunL()
+	{
+	iResultStatus = iStatus.Int();
+	User::LeaveIfError( iStatus.Int() );
+
+	switch (iState)
+		{
+		//coverity[unterminated_case]
+		case EStart:
+				// go further
+			CreateDestBitmapsL();
+		//coverity[fallthrough]
+		case EClip:
+			{
+			if (iSingleton->ClippingSet())
+				{
+				DeletePreTranformBmps();
+				DoClipL(iCurrentSource, iClippingDest);
+				iCurrentSource	= iClippingDest;
+				iState=ETransform;
+				RunAgain();
+				break;
+				}
+			} // if no clipping just go further
+		case ETransform:
+			{
+			iState = ETransform;
+			if (iSingleton->TransformOptions()==0)
+				{
+				iState = EScale;
+				RunAgain();
+				break;
+				}
+			if (iTransformTodo==0)
+				{
+				iState = ETransformDone;
+				}
+			else
+				{
+				CBitmapRotator::TRotationAngle transfromInstr=CBitmapRotator::TRotationAngle(NextTransform(iTransformTodo));
+				if (iCurrentSource != iTransformDest)
+					{
+					iSingleton->RotatorL().Rotate(&iStatus, *iCurrentSource, *iTransformDest, transfromInstr);
+					}
+				else
+					{
+					iSingleton->RotatorL().Rotate(&iStatus, *iTransformDest, transfromInstr);
+					}
+				
+				iCurrentSource = iTransformDest;
+				SetActive();
+				break;
+				}
+			}
+		case ETransformDone:
+			{
+			iCurrentSource	= iTransformDest;
+			} // and go to scale
+		case EScale:
+			iState = EScale;
+			if (iClippingDest!=iCurrentSource)
+				{
+				DeletePreTranformBmps();
+				}			
+			if (iScaleNeeded)
+				{
+				CBitmapScaler& scaler=iSingleton->ScalerL();
+				User::LeaveIfError( scaler.SetQualityAlgorithm( CBitmapScaler::TQualityAlgorithm(iScaleQuality)) );
+				scaler.Scale(&iStatus, *iCurrentSource, *iScaleDest, EFalse);
+				// the EFalse is used because the Scaler uses an algorithm that is different for one 
+				// that is used by CImageDecoder to calculate scaled sizes, so sizes sometime differ.
+				// there is no workaround for now....
+				iCurrentSource	= iScaleDest;
+				SetActive();
+				iState = EDone;
+				break;
+				}
+		case EDone:
+			iState = EDone;
+			if (iClippingDest!=iCurrentSource)
+				{
+				DeletePreTranformBmps();
+				}
+			if (iTransformDest!=iCurrentSource)
+				{
+				delete iTransformDest;
+				iTransformDest = NULL;
+				}				
+			iObserver.OnTransformDone(iResultStatus);
+			break;
+		default:
+			ASSERT(EFalse);
+		}
+	}
+
+void CAsyncTransformer::Cleanup()
+	{
+	iSingleton->Cleanup();
+	DeletePreTranformBmps();
+	}
+
+void CAsyncTransformer::DoCancel()
+	{
+	Cleanup();
+	iStatus = KErrCancel;
+	}
+
+void CAsyncTransformer::CreateDestBitmapsL()
+	{
+	delete iScaleDest; iScaleDest = NULL;
+
+	iScaleDest = new (ELeave) CFbsBitmap();
+	User::LeaveIfError(iScaleDest->Create(iDestSize, iCurrentSource->DisplayMode()) );
+
+	delete iTransformDest; iTransformDest= NULL;
+
+	iTransformDest = new (ELeave) CFbsBitmap();
+	User::LeaveIfError(iTransformDest->Create(TSize(1,1), iCurrentSource->DisplayMode()) );
+	}
+
+void CAsyncTransformer::DeletePreTranformBmps()
+	{
+	delete iClippingDest;
+	iClippingDest = NULL;
+	}
+
+void CAsyncTransformer::DoClipL(CFbsBitmap* aSrc, CFbsBitmap*& aDest)
+	{
+	ASSERT(aDest==NULL);
+	aDest = new (ELeave) CFbsBitmap();
+	User::LeaveIfError( aDest->Create(iTrueClipRect.Size(), aSrc->DisplayMode()) );
+	
+	CFbsBitmapDevice* device=CFbsBitmapDevice::NewL(aDest);
+	CleanupStack::PushL(device);
+	CFbsBitGc* gc=CFbsBitGc::NewL();
+	CleanupStack::PushL(gc);
+	gc->Activate(device);
+	gc->BitBlt(TPoint(0,0), aSrc, iTrueClipRect);
+	CleanupStack::PopAndDestroy(2,device);
+	}
+
+void CAsyncTransformer::Transform(CFbsBitmap* aImage, TBool aMantainAspect)
+	{
+	ASSERT(!IsActive());
+
+	iImgSource	= iCurrentSource = aImage;
+	iKeepAspect	= aMantainAspect;
+
+	const TSize srcSize(aImage->SizeInPixels());
+	
+	iTrueClipRect = TRect(TPoint(0,0), srcSize.AsPoint());
+	TSize clipRectSize(srcSize);
+	if (iSingleton->ClippingSet())
+		{
+		const TRect& clipRect=iSingleton->ClipRect();
+		iTrueClipRect.iTl.iX=MulDiv(clipRect.iTl.iX, srcSize.iWidth, iSingleton->TrueSrcSize().iWidth);
+		iTrueClipRect.iTl.iY=MulDiv(clipRect.iTl.iY, srcSize.iHeight,iSingleton->TrueSrcSize().iHeight);
+		iTrueClipRect.SetWidth(MulDiv(clipRect.Width(), srcSize.iWidth, iSingleton->TrueSrcSize().iWidth));
+		iTrueClipRect.SetHeight(MulDiv(clipRect.Height(),srcSize.iHeight, iSingleton->TrueSrcSize().iHeight));
+		clipRectSize=ScaleSize(srcSize, iSingleton->TrueSrcSize(), clipRect.Size());
+		}
+	RotateSize(clipRectSize, iSingleton->TransformOptions());
+	const TInt KMaxDelta=Min(7, Max(0, Max(iDestSize.iWidth / clipRectSize.iWidth, iDestSize.iHeight / clipRectSize.iHeight)-1 ));
+	// apply some treshold to size comparison because of decoder rounding algorithm
+	iScaleNeeded = (Abs(iDestSize.iWidth-clipRectSize.iWidth)>KMaxDelta || Abs(iDestSize.iHeight-clipRectSize.iHeight)>KMaxDelta);
+	Restart();
+	}
+
+
+TInt CAsyncTransformer::SetScaleQuality(TInt aQualityValue)
+	{
+	iScaleQuality = aQualityValue;
+	return KErrNone;
+	}
+
+void CAsyncTransformer::Restart()
+	{
+	iTransformTodo	= iSingleton->TransformOptions();
+	iCurrentSource	= iImgSource;
+	iState			= EStart;
+	
+	iResultStatus = KErrNone;
+	RunAgain();
+	}
+
+void CAsyncTransformer::RunAgain()
+	{
+	SetActive();
+	TRequestStatus* pR=&iStatus;
+	User::RequestComplete(pR,KErrNone);
+	}
+
+/*static*/
+CTransformerSharedData* CTransformerSharedData::NewL()
+	{
+	CTransformerSharedData* self = new (ELeave) CTransformerSharedData();
+	self->AddRef();
+	return self;
+	}
+
+void CTransformerSharedData::AddRef()
+	{
+	++iRefCount;
+	}
+
+void CTransformerSharedData::Release()
+	{
+	ASSERT(iRefCount>0);
+	if (--iRefCount==0)
+		{
+		delete this;
+		}
+	}
+
+
+void CTransformerSharedData::Cleanup()
+	{
+	delete iScaler;
+	iScaler = NULL;
+	delete iRotator;
+	iRotator= NULL;
+	}
+	
+CTransformerSharedData::~CTransformerSharedData()
+	{
+	ASSERT(iRefCount==0);
+	Cleanup();
+	}
+
+inline 
+CBitmapScaler& CTransformerSharedData::ScalerL()
+	{
+	if (iScaler==NULL)
+		{
+		iScaler=CBitmapScaler::NewL();
+		}
+	return *iScaler;
+	}
+
+inline 
+CBitmapRotator&	CTransformerSharedData::RotatorL()
+	{
+	if (iRotator == NULL)
+		{
+		iRotator = CBitmapRotator::NewL();
+		}
+	return *iRotator;
+	}
+