sl@0: // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #include "directgdigcwrapper.h"
sl@0: #include "mwsgraphicscontexttodirectgdimappings.h"
sl@0: #include <s32mem.h>
sl@0: #include "stdpanic.h"
sl@0: #include <graphics/lookuptable.h>
sl@0: #include <graphics/directgdidriver.h>
sl@0: #include <graphics/directgdidrawablesource.h>
sl@0: 
sl@0: void Panic(TStdPluginPanic aPanic)
sl@0: 	{
sl@0: 	_LIT(KStdPanicCategory, "WSERV-TEST-PLUGIN");
sl@0: 	User::Panic(KStdPanicCategory, aPanic);
sl@0: 	}
sl@0: 
sl@0: CDirectGdiGcWrapper* CDirectGdiGcWrapper::NewL(RDirectGdiImageTarget& aTarget)
sl@0: 	{
sl@0: 	CDirectGdiGcWrapper* self = new(ELeave) CDirectGdiGcWrapper;
sl@0: 	CleanupStack::PushL(self);
sl@0: 	CDirectGdiDriver* driver = CDirectGdiDriver::Static();
sl@0: 	User::LeaveIfNull(driver);
sl@0: 	self->iContext = CDirectGdiContext::NewL(*driver);
sl@0: 	TInt err = self->iContext->Activate(aTarget);
sl@0: 	User::LeaveIfError(err);
sl@0: 	self->iErrorCode = KErrNone;
sl@0: 	self->iGcBuf = CBufSeg::NewL(512);
sl@0: 	//MWsFader
sl@0: 	//Default in BitGdi was 128 for the blackMap and 255 for the whiteMap
sl@0: 	//SetFadingParameters shows how the fade color is computed
sl@0: 	self->iFadeColor.SetInternal(0x80FFFFFF);
sl@0: 	
sl@0: 	self->iLut = PtrTo16BitNormalisationTable();
sl@0: 	CleanupStack::Pop(self);
sl@0: 	return self;
sl@0: 	}
sl@0: 
sl@0: CDirectGdiGcWrapper::~CDirectGdiGcWrapper()
sl@0: 	{
sl@0: 	delete iContext;
sl@0: 	delete iGcBuf;
sl@0: 	iClippingRegion.Close();
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::BitBlt(const TPoint& aDestPos, const CFbsBitmap& aSourceBitmap)
sl@0: 	{
sl@0: 	iContext->BitBlt(aDestPos, aSourceBitmap);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::BitBlt(const TPoint& aDestPos, const CFbsBitmap& aSourceBitmap, const TRect& aSourceRect)
sl@0: 	{
sl@0: 	iContext->BitBlt(aDestPos, aSourceBitmap, aSourceRect);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::BitBltMasked(const TPoint& aDestPos,	const CFbsBitmap& aSourceBitmap, const TRect& aSourceRect, const CFbsBitmap& aMaskBitmap, TBool aInvertMask)
sl@0: 	{
sl@0: 	iContext->BitBltMasked(aDestPos, aSourceBitmap, aSourceRect, aMaskBitmap, aInvertMask);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::BitBltMasked(const TPoint& aDestPos, const CFbsBitmap& aSourceBitmap, const TRect& aSourceRect, const CFbsBitmap& aMaskBitmap, const TPoint& aMaskPos)
sl@0: 	{
sl@0: 	iContext->BitBltMasked(aDestPos, aSourceBitmap, aSourceRect, aMaskBitmap, aMaskPos);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::ResetClippingRegion()
sl@0: 	{
sl@0: 	iContext->ResetClippingRegion();
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::Clear()
sl@0: 	{
sl@0: 	iContext->Clear();
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::Clear(const TRect& aRect)
sl@0: 	{
sl@0: 	iContext->Clear(aRect);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::ResetBrushPattern()
sl@0: 	{
sl@0: 	iContext->ResetBrushPattern();
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::ResetFont()
sl@0: 	{
sl@0: 	iContext->ResetFont();
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawArc(const TRect& aRect, const TPoint& aStart, const TPoint& aEnd)
sl@0: 	{
sl@0: 	iContext->DrawArc(aRect, aStart, aEnd);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawPie(const TRect& aRect, const TPoint& aStart, const TPoint& aEnd)
sl@0: 	{
sl@0: 	iContext->DrawPie(aRect, aStart, aEnd);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawBitmap(const TRect& aDestRect, const CFbsBitmap& aSourceBitmap)
sl@0: 	{
sl@0: 	iContext->DrawBitmap(aDestRect, aSourceBitmap);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawBitmap(const TRect& aDestRect, const CFbsBitmap& aSourceBitmap, const TRect& aSourceRect)
sl@0: 	{
sl@0: 	iContext->DrawBitmap(aDestRect,	aSourceBitmap, aSourceRect);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawBitmapMasked(const TRect& aDestRect, const CFbsBitmap& aSourceBitmap, const TRect& aSourceRect, const CFbsBitmap& aMaskBitmap, TBool aInvertMask)
sl@0: 	{
sl@0: 	iContext->DrawBitmapMasked(aDestRect, aSourceBitmap, aSourceRect, aMaskBitmap, aInvertMask);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawRoundRect(const TRect& aRect, const TSize& aEllipse)
sl@0: 	{
sl@0: 	iContext->DrawRoundRect(aRect, aEllipse);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawPolyLine(const TArray<TPoint>& aPointList)
sl@0: 	{
sl@0: 	iContext->DrawPolyLine(aPointList);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawPolyLineNoEndPoint(const TArray<TPoint>& aPointList)
sl@0: 	{
sl@0: 	iContext->DrawPolyLineNoEndPoint(aPointList);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawPolygon(const TArray<TPoint>& aPointList, TFillRule aFillRule)
sl@0: 	{
sl@0: 	iContext->DrawPolygon(aPointList, MWsGraphicsContextToDirectGdiMappings::Convert(aFillRule));
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawEllipse(const TRect& aRect)
sl@0: 	{
sl@0: 	iContext->DrawEllipse(aRect);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawLine(const TPoint& aStart, const TPoint& aEnd)
sl@0: 	{
sl@0: 	iContext->DrawLine(aStart, aEnd);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawLineTo(const TPoint& aPoint)
sl@0: 	{
sl@0: 	iContext->DrawLineTo(aPoint);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawLineBy(const TPoint& aVector)
sl@0: 	{
sl@0: 	iContext->DrawLineBy(aVector);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawRect(const TRect& aRect)
sl@0: 	{
sl@0: 	iContext->DrawRect(aRect);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawText(const TDesC& aText,const TTextParameters* aParam)
sl@0: 	{
sl@0: 	iContext->DrawText(aText, MWsGraphicsContextToDirectGdiMappings::Convert(aParam));
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawText(const TDesC& aText,const TTextParameters* aParam,const TPoint& aPosition)
sl@0: 	{
sl@0: 	iContext->DrawText(aText, MWsGraphicsContextToDirectGdiMappings::Convert(aParam), aPosition);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawText(const TDesC& aText,const TTextParameters* aParam,const TRect& aClipRect)
sl@0: 	{
sl@0: 	iContext->DrawText(aText, MWsGraphicsContextToDirectGdiMappings::Convert(aParam), aClipRect);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawText(const TDesC& aText,const TTextParameters* aParam,const TRect& aClipFillRect,TInt aBaselineOffset, TTextAlign aHrz,TInt aMargin)
sl@0: 	{
sl@0: 	iContext->DrawText(aText, MWsGraphicsContextToDirectGdiMappings::Convert(aParam), aClipFillRect, aBaselineOffset, MWsGraphicsContextToDirectGdiMappings::Convert(aHrz), aMargin);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawTextVertical(const TDesC& aText,const TTextParameters* aParam,TBool aUp)
sl@0: 	{
sl@0: 	iContext->DrawTextVertical(aText, MWsGraphicsContextToDirectGdiMappings::Convert(aParam), aUp);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawTextVertical(const TDesC& aText,const TTextParameters* aParam,const TPoint& aPosition,TBool aUp)
sl@0: 	{
sl@0: 	iContext->DrawTextVertical(aText, MWsGraphicsContextToDirectGdiMappings::Convert(aParam), aPosition, aUp);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawTextVertical(const TDesC& aText,const TTextParameters* aParam,const TRect& aClipRect,TBool aUp)
sl@0: 	{
sl@0: 	iContext->DrawTextVertical(aText, MWsGraphicsContextToDirectGdiMappings::Convert(aParam), aClipRect, aUp);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawTextVertical(const TDesC& aText,const TTextParameters* aParam,const TRect& aClipRect,TInt aBaselineOffset,TBool aUp,TTextAlign aVert,TInt aMargin)
sl@0: 	{
sl@0: 	iContext->DrawTextVertical(aText, MWsGraphicsContextToDirectGdiMappings::Convert(aParam), aClipRect, aBaselineOffset, aUp, MWsGraphicsContextToDirectGdiMappings::Convert(aVert), aMargin);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::DrawTextVertical(const TDesC& aText,const TTextParameters* aParam,const TRect& aClipRect,TInt aBaselineOffset,TInt aTextWidth,TBool aUp,TTextAlign aVert,TInt aMargin)
sl@0: 	{
sl@0: 	iContext->DrawTextVertical(aText, MWsGraphicsContextToDirectGdiMappings::Convert(aParam), aClipRect, aBaselineOffset, aTextWidth, aUp, MWsGraphicsContextToDirectGdiMappings::Convert(aVert), aMargin);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::MoveTo(const TPoint& aPoint)
sl@0: 	{
sl@0: 	iContext->MoveTo(aPoint);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::MoveBy(const TPoint& aVector)
sl@0: 	{
sl@0: 	iContext->MoveBy(aVector);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::Plot(const TPoint& aPoint)
sl@0: 	{
sl@0: 	iContext->Plot(aPoint);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::Reset()
sl@0: 	{
sl@0: 	iContext->Reset();
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetBrushColor(const TRgb& aColor)
sl@0: 	{
sl@0: 	iContext->SetBrushColor(aColor);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetBrushOrigin(const TPoint& aOrigin)
sl@0: 	{
sl@0: 	iContext->SetBrushOrigin(aOrigin);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetBrushStyle(TBrushStyle aBrushStyle)
sl@0: 	{
sl@0: 	iContext->SetBrushStyle(MWsGraphicsContextToDirectGdiMappings::Convert(aBrushStyle));
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetClippingRegion(const TRegion& aRegion)
sl@0: 	{
sl@0: 	CDirectGdiDriver* driver = CDirectGdiDriver::Static();
sl@0: 	driver->GetError(); //make sure that an error has been received 
sl@0: 	iContext->SetClippingRegion(aRegion);
sl@0: 	TInt err = driver->GetError();
sl@0: 	SetError(err);
sl@0: 	if(err == KErrNone)
sl@0: 		{
sl@0: 		iClippingRegion.Copy(aRegion);
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetDrawMode(TDrawMode aDrawMode)
sl@0: 	{
sl@0: 	iContext->SetDrawMode(MWsGraphicsContextToDirectGdiMappings::LossyConvert(aDrawMode));
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetOrigin(const TPoint& aPoint)
sl@0: 	{
sl@0: 	iContext->SetOrigin(aPoint);
sl@0: 	iOrigin = aPoint;
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetPenColor(const TRgb& aColor)
sl@0: 	{
sl@0: 	iContext->SetPenColor(aColor);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetPenStyle(TPenStyle aPenStyle)
sl@0: 	{
sl@0: 	iContext->SetPenStyle(MWsGraphicsContextToDirectGdiMappings::Convert(aPenStyle));
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetPenSize(const TSize& aSize)
sl@0: 	{
sl@0: 	iContext->SetPenSize(aSize);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetTextShadowColor(const TRgb& aColor)
sl@0: 	{
sl@0: 	iContext->SetTextShadowColor(aColor);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetCharJustification(TInt aExcessWidth, TInt aNumChars)
sl@0: 	{
sl@0: 	iContext->SetCharJustification(aExcessWidth, aNumChars);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetWordJustification(TInt aExcessWidth, TInt aNumGaps)
sl@0: 	{
sl@0: 	iContext->SetWordJustification(aExcessWidth, aNumGaps);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetUnderlineStyle(TFontUnderline aUnderlineStyle)
sl@0: 	{
sl@0: 	iContext->SetUnderlineStyle(MWsGraphicsContextToDirectGdiMappings::Convert(aUnderlineStyle));
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetStrikethroughStyle(TFontStrikethrough aStrikethroughStyle)
sl@0: 	{
sl@0: 	iContext->SetStrikethroughStyle(MWsGraphicsContextToDirectGdiMappings::Convert(aStrikethroughStyle));
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetBrushPattern(const CFbsBitmap& aBitmap)
sl@0: 	{
sl@0: 	iContext->SetBrushPattern(aBitmap);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetBrushPattern(TInt aFbsBitmapHandle)
sl@0: 	{
sl@0: 	iContext->SetBrushPattern(aFbsBitmapHandle);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetFont(const CFont* aFont)
sl@0: 	{
sl@0: 	iContext->SetFont(aFont);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::CopyRect(const TPoint& aOffset, const TRect& aRect)
sl@0: 	{
sl@0: 	iContext->CopyRect(aOffset, aRect);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::UpdateJustification(const TDesC& aText,const TTextParameters* aParam)
sl@0: 	{
sl@0: 	iContext->UpdateJustification(aText, MWsGraphicsContextToDirectGdiMappings::Convert(aParam));
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::UpdateJustificationVertical(const TDesC& aText,const TTextParameters* aParam,TBool aUp)
sl@0: 	{
sl@0: 	iContext->UpdateJustificationVertical(aText, MWsGraphicsContextToDirectGdiMappings::Convert(aParam), aUp);
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::SetFontNoDuplicate(const CFont* aFont)
sl@0: 	{
sl@0: 	iContext->SetFontNoDuplicate(static_cast<const CDirectGdiFont*>(aFont));
sl@0: 	}
sl@0: 
sl@0: TBool CDirectGdiGcWrapper::HasBrushPattern() const
sl@0: 	{
sl@0: 	return iContext->HasBrushPattern();
sl@0: 	}
sl@0: 
sl@0: TBool CDirectGdiGcWrapper::HasFont() const
sl@0: 	{
sl@0: 	return iContext->HasFont();
sl@0: 	}
sl@0: 
sl@0: TRgb CDirectGdiGcWrapper::BrushColor() const
sl@0: 	{
sl@0: 	return iContext->BrushColor();
sl@0: 	}
sl@0: 
sl@0: TRgb CDirectGdiGcWrapper::PenColor() const
sl@0: 	{
sl@0: 	return iContext->PenColor();
sl@0: 	}
sl@0: 
sl@0: TRgb CDirectGdiGcWrapper::TextShadowColor() const
sl@0: 	{
sl@0: 	return iContext->TextShadowColor();
sl@0: 	}
sl@0: 
sl@0: TAny* CDirectGdiGcWrapper::ResolveObjectInterface(TUint /*aTypeId*/)
sl@0: 	{
sl@0: 	return NULL;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Sets the error code. If the error code is already set to a value other
sl@0: than KErrNone, the error code will not be modified.
sl@0: 
sl@0: @param  aErr The error code to set.
sl@0: 
sl@0: @post 	The error code has been set.
sl@0: */
sl@0: void CDirectGdiGcWrapper::SetError(TInt aError)
sl@0: 	{
sl@0: 	if (aError != KErrNone && iErrorCode == KErrNone)
sl@0: 		{
sl@0: 		iErrorCode = aError;
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Returns the first error code (set as the result of calling some CDirectGdiGcWrapper API), if any,
sl@0: since the last call to this function or, if it has not previously been called, since
sl@0: the CDirectGdiGcWrapper was constructed. Calling this function clears the error code.
sl@0: 
sl@0: @post 	The error code has been reset after being read.
sl@0: 
sl@0: @return The first error code, if any, since the last call to this function or, 
sl@0: 		if it has not previously been called, since the CDirectGdiGcWrapper was constructed. 
sl@0: 		KErrNone will indicate that no such error has occurred.
sl@0: */
sl@0: TInt CDirectGdiGcWrapper::GetError()
sl@0: 	{
sl@0: 	TInt err = iErrorCode;
sl@0: 	iErrorCode = KErrNone;
sl@0: 	return err;
sl@0: 	}
sl@0: 
sl@0: TPoint CDirectGdiGcWrapper::Origin() const
sl@0: 	{
sl@0: 	return iOrigin;
sl@0: 	}
sl@0: 
sl@0: const TRegion& CDirectGdiGcWrapper::ClippingRegion()
sl@0: 	{
sl@0: 	return iClippingRegion;
sl@0: 	}
sl@0: 
sl@0: TInt CDirectGdiGcWrapper::Push()
sl@0: 	{
sl@0: 	// the buf format is len+data where data is written by the GC's ExternalizeL()
sl@0: 	iGcBuf->Reset();
sl@0: 	CBufBase& buf = *iGcBuf;
sl@0: 	const TInt start = buf.Size();
sl@0: 	RBufWriteStream out(buf,start);
sl@0: 	TRAPD(err,out.WriteInt32L(0));
sl@0: 	if(!err)
sl@0: 		{
sl@0: 		TRAP(err,iContext->ExternalizeL(out));
sl@0: 		}
sl@0: 	if(err) //rollback addition
sl@0: 		{
sl@0: 		buf.Delete(start,buf.Size()-start);
sl@0: 		}
sl@0: 	else //fixup len
sl@0: 		{
sl@0: 		TRAP_IGNORE(out.CommitL();) // can't see this failing
sl@0: 		TPckgBuf<TInt32> pckg(buf.Size()-sizeof(TInt32)-start);
sl@0: 		buf.Write(start,pckg);
sl@0: 		}
sl@0: 	return err;
sl@0: 	}
sl@0: 
sl@0: void CDirectGdiGcWrapper::Pop()
sl@0: 	{
sl@0: 	CBufBase& buf = *iGcBuf;
sl@0: 	TInt ofs = 0;
sl@0: 	FOREVER
sl@0: 		{
sl@0: 		TInt chunk = 0;
sl@0: 		RBufReadStream in(buf,ofs);
sl@0: 		TRAPD(err,chunk = in.ReadInt32L());
sl@0: 		if(err)
sl@0: 			{
sl@0: 			STD_ASSERT_DEBUG(err != 0, EStdPanicPopGcSettings);
sl@0: 			return;
sl@0: 			}
sl@0: 		if(ofs+sizeof(TInt32)+chunk >= buf.Size()) // the last chunk?
sl@0: 			{
sl@0: 			TRAP_IGNORE(iContext->InternalizeL(in));
sl@0: 			buf.Delete(ofs,buf.Size()-ofs);
sl@0: 			return;
sl@0: 			}
sl@0: 		ofs += chunk + sizeof(TInt32);
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: //Default method of fading simply uses bitgdi to perform fading
sl@0: void CDirectGdiGcWrapper::FadeArea(const TRegion& aRegion)
sl@0: 	{
sl@0: 	if (!&aRegion || aRegion.CheckError())
sl@0: 		return;
sl@0: 
sl@0: 	iContext->Reset();
sl@0: 	iContext->SetClippingRegion(aRegion);
sl@0: 	iContext->SetPenStyle(DirectGdi::ENullPen);
sl@0: 	iContext->SetBrushStyle(DirectGdi::ESolidBrush);
sl@0: 	iContext->SetBrushColor(iFadeColor);
sl@0: 	iContext->DrawRect(aRegion.BoundingRect());
sl@0: 	}
sl@0: 	
sl@0: //Default method of fading expects two TUint8's describing the black/white map 
sl@0: //as possible fading parameters
sl@0: void CDirectGdiGcWrapper::SetFadingParameters(const TDesC8& aData)
sl@0:   	{
sl@0: 	TPckgBuf<TFadingParams> buf;
sl@0: 	buf.Copy(aData);
sl@0: 	TFadingParams parameters = buf();
sl@0: 
sl@0: 	//Situations where blackMap > whiteMap are NOT supported
sl@0: 	if (parameters.blackMap > parameters.whiteMap)
sl@0: 		{
sl@0: 		TUint8 oldMap = parameters.blackMap;
sl@0: 		parameters.blackMap = parameters.whiteMap;
sl@0: 		parameters.whiteMap = oldMap;
sl@0: 		}
sl@0: 	
sl@0: 	//CFbsBitGc::FadeArea() does the following per color component:
sl@0: 	//   dst = dst * (whiteMap - blackMap) + blackMap;
sl@0: 
sl@0: 	//To achieve the same effect using MWsGraphicsContext we draw a rectangle
sl@0: 	//with specific intensity and alpha values:
sl@0: 	//   dst = dst * (1 - alpha) + intensity * alpha;
sl@0: 	//Thus:
sl@0: 	//   alpha = 1 - whiteMap + blackMap;
sl@0: 	//   intensity = blackMap / alpha;
sl@0: 
sl@0: 	// alpha = 1 - whiteMap + blackMap;
sl@0: 	TInt alpha = 255 - parameters.whiteMap + parameters.blackMap;
sl@0: 	// intensity = blackMap / alpha;
sl@0: 	TInt i = (parameters.blackMap * iLut[alpha]) >> 8;
sl@0: 
sl@0: 	iFadeColor.SetInternal(i << 16 | i << 8 | i | alpha << 24);
sl@0:   	}