// Copyright (c) 2006-2009 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 "Graphics/WSGRAPHICMSGBUF.H"

#include "DrawSection.h"

const TInt KBufferSize = 1000;

/**

This uid is used to identify a drawsection in the messagebuffer that is used for IPC.

*/

const TUid KDrawSection = {0x101F63B2};

/**

Creates and returns new drawsection.

@return A new instance of CDrawSection.

*/

CDrawSection* CDrawSection::NewL()

	{

	return new (ELeave) CDrawSection;

	}

/**

Creates and returns new drawsection.

@param aDrawRect The drawrect of the drawsection.

@param aBoundingRect The boundingrect of the drawcommands of this section.

@param aHasBitmapCommand ETrue if the commandbuffer of this drawsection includes a bitmap command of any sort.

@return A new instance of CDrawSection.

*/	

CDrawSection* CDrawSection::NewL(const TRect& aDrawRect, const TRect& aBoundingRect, TBool aHasBitmapCommand)

	{

	return new (ELeave) CDrawSection(aDrawRect, aBoundingRect, aHasBitmapCommand);

	}

CDrawSection::CDrawSection()

	{

	}

CDrawSection::CDrawSection(const TRect& aDrawRect, const TRect& aBoundingRect, TBool aHasBitmapCommand) : iDrawRect(aDrawRect), 

	iBoundingRect(aBoundingRect), iHasBitmapCommand(aHasBitmapCommand), iHasBeenExternalized(EFalse)

	{

	}

CDrawSection::~CDrawSection()

	{

	delete iSectionSegBuf;

	}

/**

Sets this drawsection's segmented commandbuffer and takes the ownership of the allocated memory.

@param aSegbuf This section's segmented commandbuffer.

*/

void CDrawSection::SetBuffer(CBufBase* aSegBuf)

	{

	__ASSERT_DEBUG(aSegBuf, User::Invariant());

	iSectionSegBuf = aSegBuf;

	}

/**

Returns this drawsection's segmented commandbuffer.

@return this drawsection's segmented commandbuffer.

*/

CBufBase* CDrawSection::Buffer() const

	{

	return iSectionSegBuf;

	}

/**

Sets if this drawsection has been externalized anytime. This is used for partial IPC updates.

@param aHasBeenExternalized ETrue if this drawsection has been externalized, otherwise EFalse.

*/

void CDrawSection::SetHasBeenExternalized(TBool aHasBeenExternalized)

	{

	iHasBeenExternalized = aHasBeenExternalized;

	}

/**

Returns ETrue if this drawsection has been externalized, otherwise EFalse.

@return ETrue if this drawsection has been externalized, otherwise EFalse.

*/	

TBool CDrawSection::HasBeenExternalized() const

	{

	return iHasBeenExternalized;

	}

/**

Compares this drawsection to aDrawSection and check if they are identical.

@param aDrawSection The drawsection to compare with.

@return ETrue if the drawsections are identical, otherwise EFalse.

*/

TBool CDrawSection::IsIdentical(const CDrawSection& aDrawSection) const

	{

	const TRect drawRect = aDrawSection.DrawRect();

	CBufBase* segBuf = aDrawSection.Buffer();

	if(!iHasBitmapCommand && iDrawRect.iTl == drawRect.iTl && iDrawRect.iBr == drawRect.iBr && segBuf->Size() == iSectionSegBuf->Size())

		{

		const TInt count = iSectionSegBuf->Size();

		for(TInt i = 0; i < count; i++)

			{

			const TPtr8 comparePtr = segBuf->Ptr(i);

			if(iSectionSegBuf->Ptr(i).Compare(segBuf->Ptr(i))) //Not identical

				return EFalse;

			i += comparePtr.Size();

			}

		return ETrue;

		}

	return EFalse;

	}

/**

Returns the drawrect of this drawsection.

@return The drawrect of this drawsection.

*/

TRect CDrawSection::DrawRect() const

	{

	return iDrawRect;

	}

/**

Externalizes this drawsection to a message buffer to send over IPC.

@param aMsgBuf The message buffer to add this drawsection to.

*/

void CDrawSection::ExternalizeL(RWsGraphicMsgBuf& aMsgBuf)

	{

	const TInt length = sizeof(TRect)*2 + iSectionSegBuf->Size();

	TPtr8 msgPtr(NULL, 0);

	User::LeaveIfError(aMsgBuf.Append(KDrawSection, length, msgPtr));

	// Add drawRect to aMsgBuf

	const TPckgBuf<TRect> drawRect(iDrawRect);

	msgPtr.Append(drawRect);

	// Add boundingRect to aMsgBuf

	const TPckgBuf<TRect> boundingRect(iBoundingRect);

	msgPtr.Append(boundingRect);

	// Add drawcommands to aMsgBuf

	TInt count = 0;

	const TInt sectionSegBufSize = iSectionSegBuf->Size();

	while(count < sectionSegBufSize)

		{		

		TPtr8 ptr = iSectionSegBuf->Ptr(count);

		msgPtr.Append(ptr);

		count += ptr.Size();

		}	

	}

/**

Loads a drawsection from externalized data.

@param aData The parser for the externalized data.

@param aIndex The index of the drawsection in CCommandBuffer::iDrawSections to load from the externalized data.

*/

TInt CDrawSection::LoadL(const TWsGraphicMsgBufParser& aData, TInt aIndex)

	{

	if(aData.Uid(aIndex).iUid != KDrawSection.iUid)

		{

		return KErrArgument;

		}

	const TPtrC8 pckg = aData.Data(aIndex);	

	const TPtrC8 drawRectPtr = pckg.Left(sizeof(TRect));

	const TPtrC8 boundingRectPtr = pckg.Mid(sizeof(TRect), sizeof(TRect));

	const TPtrC8 segBufPtr = pckg.Mid(sizeof(TRect)*2);

	Mem::Copy(&iDrawRect, drawRectPtr.Ptr(), sizeof(TRect));

	Mem::Copy(&iBoundingRect, boundingRectPtr.Ptr(), sizeof(TRect));

	if(iSectionSegBuf)

		delete iSectionSegBuf;

	iSectionSegBuf = CBufSeg::NewL(KBufferSize);

	iSectionSegBuf->InsertL(0, segBufPtr);

	return KErrNone;	

	}