imaging/imagingfws/ImageDisplay/plugins/IclWrapper/ImagePostprocess.cpp
changeset 0 5752a19fdefe
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     1 // Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
       
     2 // All rights reserved.
       
     3 // This component and the accompanying materials are made available
       
     4 // under the terms of "Eclipse Public License v1.0"
       
     5 // which accompanies this distribution, and is available
       
     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     7 //
       
     8 // Initial Contributors:
       
     9 // Nokia Corporation - initial contribution.
       
    10 //
       
    11 // Contributors:
       
    12 //
       
    13 // Description:
       
    14 //
       
    15 
       
    16 /** 	@file
       
    17 	@internalComponent */
       
    18 #include <bitmaptransforms.h>
       
    19 #include <icl/imagedisplayplugin.h>
       
    20 #include "MiscUtils.h"
       
    21 
       
    22 #include "ImagePostprocess.h"
       
    23 
       
    24 /*static*/
       
    25 CAsyncTransformer* CAsyncTransformer::NewL(MPostProcessObserver& aObserver,CTransformerSharedData& aSingleton,
       
    26 										   const TSize& aDestSize)
       
    27 	{
       
    28 	return new (ELeave) CAsyncTransformer(aObserver, aSingleton, aDestSize);
       
    29 	}
       
    30 
       
    31 CAsyncTransformer::CAsyncTransformer(MPostProcessObserver& aObserver, CTransformerSharedData& aSingleton, const TSize& aDestSize):
       
    32 														CActive(EPriorityNormal),
       
    33 														iObserver(aObserver),
       
    34 														iSingleton(&aSingleton),
       
    35 														iDestSize(aDestSize),
       
    36 														iScaleQuality(CBitmapScaler::EMinimumQuality)
       
    37 														
       
    38 	{
       
    39 	iSingleton->AddRef();
       
    40 	CActiveScheduler::Add(this);
       
    41 	}
       
    42 
       
    43 CAsyncTransformer::~CAsyncTransformer()
       
    44 	{
       
    45 	Cleanup();
       
    46 	iSingleton->Release();
       
    47 	iSingleton = NULL;
       
    48 	delete iScaleDest;
       
    49 	delete iTransformDest;
       
    50 	}
       
    51 
       
    52 TInt CAsyncTransformer::RunError(TInt aError)
       
    53 	{
       
    54 	iResultStatus = aError;
       
    55 	iObserver.OnTransformDone(aError);
       
    56 	return KErrNone;
       
    57 	}
       
    58 
       
    59 TInt CAsyncTransformer::NextTransform(TUint& aTransFormTodo1)
       
    60 	{
       
    61 	if ((aTransFormTodo1&CImageDisplay::EOptionRotateCw90)==CImageDisplay::EOptionRotateCw90)
       
    62 		{
       
    63 		aTransFormTodo1 ^= CImageDisplay::EOptionRotateCw90;
       
    64 		return CBitmapRotator::ERotation90DegreesClockwise;
       
    65 		}
       
    66 
       
    67 	if ((aTransFormTodo1&CImageDisplay::EOptionRotateCw180)==CImageDisplay::EOptionRotateCw180)
       
    68 		{
       
    69 		aTransFormTodo1 ^= CImageDisplay::EOptionRotateCw180;
       
    70 		return CBitmapRotator::ERotation180DegreesClockwise;
       
    71 		}
       
    72 
       
    73 	if ((aTransFormTodo1&CImageDisplay::EOptionRotateCw270)==CImageDisplay::EOptionRotateCw270)
       
    74 		{
       
    75 		aTransFormTodo1 ^= CImageDisplay::EOptionRotateCw270;
       
    76 		return CBitmapRotator::ERotation270DegreesClockwise;
       
    77 		}
       
    78 	
       
    79 	if ((aTransFormTodo1&CImageDisplay::EOptionMirrorVertical)==CImageDisplay::EOptionMirrorVertical)
       
    80 		{
       
    81 		aTransFormTodo1 ^= CImageDisplay::EOptionMirrorVertical;
       
    82 		return CBitmapRotator::EMirrorVerticalAxis;
       
    83 		}
       
    84 
       
    85 	if ((aTransFormTodo1&CImageDisplay::EOptionMirrorHorizontal)==CImageDisplay::EOptionMirrorHorizontal)
       
    86 		{
       
    87 		aTransFormTodo1 ^= CImageDisplay::EOptionMirrorHorizontal;
       
    88 		return CBitmapRotator::EMirrorHorizontalAxis;
       
    89 		}
       
    90 	
       
    91 	ASSERT(EFalse);
       
    92 	return -1;
       
    93 	}
       
    94 
       
    95 void CAsyncTransformer::RunL()
       
    96 	{
       
    97 	iResultStatus = iStatus.Int();
       
    98 	User::LeaveIfError( iStatus.Int() );
       
    99 
       
   100 	switch (iState)
       
   101 		{
       
   102 		//coverity[unterminated_case]
       
   103 		case EStart:
       
   104 				// go further
       
   105 			CreateDestBitmapsL();
       
   106 		//coverity[fallthrough]
       
   107 		case EClip:
       
   108 			{
       
   109 			if (iSingleton->ClippingSet())
       
   110 				{
       
   111 				DeletePreTranformBmps();
       
   112 				DoClipL(iCurrentSource, iClippingDest);
       
   113 				iCurrentSource	= iClippingDest;
       
   114 				iState=ETransform;
       
   115 				RunAgain();
       
   116 				break;
       
   117 				}
       
   118 			} // if no clipping just go further
       
   119 		case ETransform:
       
   120 			{
       
   121 			iState = ETransform;
       
   122 			if (iSingleton->TransformOptions()==0)
       
   123 				{
       
   124 				iState = EScale;
       
   125 				RunAgain();
       
   126 				break;
       
   127 				}
       
   128 			if (iTransformTodo==0)
       
   129 				{
       
   130 				iState = ETransformDone;
       
   131 				}
       
   132 			else
       
   133 				{
       
   134 				CBitmapRotator::TRotationAngle transfromInstr=CBitmapRotator::TRotationAngle(NextTransform(iTransformTodo));
       
   135 				if (iCurrentSource != iTransformDest)
       
   136 					{
       
   137 					iSingleton->RotatorL().Rotate(&iStatus, *iCurrentSource, *iTransformDest, transfromInstr);
       
   138 					}
       
   139 				else
       
   140 					{
       
   141 					iSingleton->RotatorL().Rotate(&iStatus, *iTransformDest, transfromInstr);
       
   142 					}
       
   143 				
       
   144 				iCurrentSource = iTransformDest;
       
   145 				SetActive();
       
   146 				break;
       
   147 				}
       
   148 			}
       
   149 		case ETransformDone:
       
   150 			{
       
   151 			iCurrentSource	= iTransformDest;
       
   152 			} // and go to scale
       
   153 		case EScale:
       
   154 			iState = EScale;
       
   155 			if (iClippingDest!=iCurrentSource)
       
   156 				{
       
   157 				DeletePreTranformBmps();
       
   158 				}			
       
   159 			if (iScaleNeeded)
       
   160 				{
       
   161 				CBitmapScaler& scaler=iSingleton->ScalerL();
       
   162 				User::LeaveIfError( scaler.SetQualityAlgorithm( CBitmapScaler::TQualityAlgorithm(iScaleQuality)) );
       
   163 				scaler.Scale(&iStatus, *iCurrentSource, *iScaleDest, EFalse);
       
   164 				// the EFalse is used because the Scaler uses an algorithm that is different for one 
       
   165 				// that is used by CImageDecoder to calculate scaled sizes, so sizes sometime differ.
       
   166 				// there is no workaround for now....
       
   167 				iCurrentSource	= iScaleDest;
       
   168 				SetActive();
       
   169 				iState = EDone;
       
   170 				break;
       
   171 				}
       
   172 		case EDone:
       
   173 			iState = EDone;
       
   174 			if (iClippingDest!=iCurrentSource)
       
   175 				{
       
   176 				DeletePreTranformBmps();
       
   177 				}
       
   178 			if (iTransformDest!=iCurrentSource)
       
   179 				{
       
   180 				delete iTransformDest;
       
   181 				iTransformDest = NULL;
       
   182 				}				
       
   183 			iObserver.OnTransformDone(iResultStatus);
       
   184 			break;
       
   185 		default:
       
   186 			ASSERT(EFalse);
       
   187 		}
       
   188 	}
       
   189 
       
   190 void CAsyncTransformer::Cleanup()
       
   191 	{
       
   192 	iSingleton->Cleanup();
       
   193 	DeletePreTranformBmps();
       
   194 	}
       
   195 
       
   196 void CAsyncTransformer::DoCancel()
       
   197 	{
       
   198 	Cleanup();
       
   199 	iStatus = KErrCancel;
       
   200 	}
       
   201 
       
   202 void CAsyncTransformer::CreateDestBitmapsL()
       
   203 	{
       
   204 	delete iScaleDest; iScaleDest = NULL;
       
   205 
       
   206 	iScaleDest = new (ELeave) CFbsBitmap();
       
   207 	User::LeaveIfError(iScaleDest->Create(iDestSize, iCurrentSource->DisplayMode()) );
       
   208 
       
   209 	delete iTransformDest; iTransformDest= NULL;
       
   210 
       
   211 	iTransformDest = new (ELeave) CFbsBitmap();
       
   212 	User::LeaveIfError(iTransformDest->Create(TSize(1,1), iCurrentSource->DisplayMode()) );
       
   213 	}
       
   214 
       
   215 void CAsyncTransformer::DeletePreTranformBmps()
       
   216 	{
       
   217 	delete iClippingDest;
       
   218 	iClippingDest = NULL;
       
   219 	}
       
   220 
       
   221 void CAsyncTransformer::DoClipL(CFbsBitmap* aSrc, CFbsBitmap*& aDest)
       
   222 	{
       
   223 	ASSERT(aDest==NULL);
       
   224 	aDest = new (ELeave) CFbsBitmap();
       
   225 	User::LeaveIfError( aDest->Create(iTrueClipRect.Size(), aSrc->DisplayMode()) );
       
   226 	
       
   227 	CFbsBitmapDevice* device=CFbsBitmapDevice::NewL(aDest);
       
   228 	CleanupStack::PushL(device);
       
   229 	CFbsBitGc* gc=CFbsBitGc::NewL();
       
   230 	CleanupStack::PushL(gc);
       
   231 	gc->Activate(device);
       
   232 	gc->BitBlt(TPoint(0,0), aSrc, iTrueClipRect);
       
   233 	CleanupStack::PopAndDestroy(2,device);
       
   234 	}
       
   235 
       
   236 void CAsyncTransformer::Transform(CFbsBitmap* aImage, TBool aMantainAspect)
       
   237 	{
       
   238 	ASSERT(!IsActive());
       
   239 
       
   240 	iImgSource	= iCurrentSource = aImage;
       
   241 	iKeepAspect	= aMantainAspect;
       
   242 
       
   243 	const TSize srcSize(aImage->SizeInPixels());
       
   244 	
       
   245 	iTrueClipRect = TRect(TPoint(0,0), srcSize.AsPoint());
       
   246 	TSize clipRectSize(srcSize);
       
   247 	if (iSingleton->ClippingSet())
       
   248 		{
       
   249 		const TRect& clipRect=iSingleton->ClipRect();
       
   250 		iTrueClipRect.iTl.iX=MulDiv(clipRect.iTl.iX, srcSize.iWidth, iSingleton->TrueSrcSize().iWidth);
       
   251 		iTrueClipRect.iTl.iY=MulDiv(clipRect.iTl.iY, srcSize.iHeight,iSingleton->TrueSrcSize().iHeight);
       
   252 		iTrueClipRect.SetWidth(MulDiv(clipRect.Width(), srcSize.iWidth, iSingleton->TrueSrcSize().iWidth));
       
   253 		iTrueClipRect.SetHeight(MulDiv(clipRect.Height(),srcSize.iHeight, iSingleton->TrueSrcSize().iHeight));
       
   254 		clipRectSize=ScaleSize(srcSize, iSingleton->TrueSrcSize(), clipRect.Size());
       
   255 		}
       
   256 	RotateSize(clipRectSize, iSingleton->TransformOptions());
       
   257 	const TInt KMaxDelta=Min(7, Max(0, Max(iDestSize.iWidth / clipRectSize.iWidth, iDestSize.iHeight / clipRectSize.iHeight)-1 ));
       
   258 	// apply some treshold to size comparison because of decoder rounding algorithm
       
   259 	iScaleNeeded = (Abs(iDestSize.iWidth-clipRectSize.iWidth)>KMaxDelta || Abs(iDestSize.iHeight-clipRectSize.iHeight)>KMaxDelta);
       
   260 	Restart();
       
   261 	}
       
   262 
       
   263 
       
   264 TInt CAsyncTransformer::SetScaleQuality(TInt aQualityValue)
       
   265 	{
       
   266 	iScaleQuality = aQualityValue;
       
   267 	return KErrNone;
       
   268 	}
       
   269 
       
   270 void CAsyncTransformer::Restart()
       
   271 	{
       
   272 	iTransformTodo	= iSingleton->TransformOptions();
       
   273 	iCurrentSource	= iImgSource;
       
   274 	iState			= EStart;
       
   275 	
       
   276 	iResultStatus = KErrNone;
       
   277 	RunAgain();
       
   278 	}
       
   279 
       
   280 void CAsyncTransformer::RunAgain()
       
   281 	{
       
   282 	SetActive();
       
   283 	TRequestStatus* pR=&iStatus;
       
   284 	User::RequestComplete(pR,KErrNone);
       
   285 	}
       
   286 
       
   287 /*static*/
       
   288 CTransformerSharedData* CTransformerSharedData::NewL()
       
   289 	{
       
   290 	CTransformerSharedData* self = new (ELeave) CTransformerSharedData();
       
   291 	self->AddRef();
       
   292 	return self;
       
   293 	}
       
   294 
       
   295 void CTransformerSharedData::AddRef()
       
   296 	{
       
   297 	++iRefCount;
       
   298 	}
       
   299 
       
   300 void CTransformerSharedData::Release()
       
   301 	{
       
   302 	ASSERT(iRefCount>0);
       
   303 	if (--iRefCount==0)
       
   304 		{
       
   305 		delete this;
       
   306 		}
       
   307 	}
       
   308 
       
   309 
       
   310 void CTransformerSharedData::Cleanup()
       
   311 	{
       
   312 	delete iScaler;
       
   313 	iScaler = NULL;
       
   314 	delete iRotator;
       
   315 	iRotator= NULL;
       
   316 	}
       
   317 	
       
   318 CTransformerSharedData::~CTransformerSharedData()
       
   319 	{
       
   320 	ASSERT(iRefCount==0);
       
   321 	Cleanup();
       
   322 	}
       
   323 
       
   324 inline 
       
   325 CBitmapScaler& CTransformerSharedData::ScalerL()
       
   326 	{
       
   327 	if (iScaler==NULL)
       
   328 		{
       
   329 		iScaler=CBitmapScaler::NewL();
       
   330 		}
       
   331 	return *iScaler;
       
   332 	}
       
   333 
       
   334 inline 
       
   335 CBitmapRotator&	CTransformerSharedData::RotatorL()
       
   336 	{
       
   337 	if (iRotator == NULL)
       
   338 		{
       
   339 		iRotator = CBitmapRotator::NewL();
       
   340 		}
       
   341 	return *iRotator;
       
   342 	}
       
   343