// Copyright (c) 2007-2009 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 "directgdiadapter.h"

#include "directgdiimagesourceimpl.h"

#include "directgdidriverimpl.h"

#include "directgdidriverprocessstate.h"

#include <graphics/sgimage.h>

/**

Constructs a CDirectGdiImageSourceImpl.

@param	aDriver		The driver implementation which created this target.

*/

CDirectGdiImageSourceImpl::CDirectGdiImageSourceImpl(CDirectGdiDriverImpl& aDriver) :

	iDriver(aDriver),

	iVgImage(VG_INVALID_HANDLE)

	{

	}

/**

Destructor. 

@post The associated VgImage (if any) is destroyed by the process state.

	  This image is removed from the associated driver's list of source images.

*/

CDirectGdiImageSourceImpl::~CDirectGdiImageSourceImpl()

{	

	GRAPHICS_LOG_DEBUG("Destroying CDirectGdiImageSourceImpl");

	if (iVgImage != VG_INVALID_HANDLE)

		{

		iDriver.ProcessState().DestroyVgImage(iDriver.EglDisplay(), iVgImage);

		}

	iDriver.UnregisterSourceImage(*this);		

}

/**

Two-phase construction of a CDirectGdiImageSourceImpl object.

@param aImage On success, holds a pointer to the newly-created image.

@param aDriver The driver to register this image with.

@param aSgImage The RSgImage which this image will be based upon.

@return KErrNone if successful, KErrNoMemory if not enough memory could be allocated, otherwise a return

        value from Construct().

*/

TInt CDirectGdiImageSourceImpl::New(CDirectGdiImageSourceImpl*& aImage, CDirectGdiDriverImpl& aDriver, const RSgImage& aSgImage)

	{

	CDirectGdiImageSourceImpl* image = new CDirectGdiImageSourceImpl(aDriver);

	if (!image)

		return KErrNoMemory;

	TInt err = image->Construct(aSgImage);

	if (err == KErrNone)

		aImage = image;

	else

		delete image;

	return err;

	}

/**

Gets the supplied image structure and sets the internal data.

Registers itself with the driver.

@param aSgImage The RSgImage to create the source image from.

@return KErrNone if successful, otherwise an error from CDirectGdiImageRef::Construct().

*/

TInt CDirectGdiImageSourceImpl::Construct(const RSgImage& aSgImage)

	{

	TInt err = CDirectGdiImageRef::Construct(aSgImage);

	if (err == KErrNone)

		{

		// Let the process state create the VGImage as EGLImages and their associated VGImages

		// are shared across all threads in this process. (Only one EGLImage can be created per RSgImage

		// in a process).

		err = iDriver.ProcessState().CreateVgImage(iDriver.EglDisplay(), iVgImage, iSgImage);

		}

	if (err == KErrNone)

		{

		err = iDriver.RegisterSourceImage(*this);				

		}

	if (err == KErrNone)

		{

		Open();

		}	

	return err;

	}