sl@0: // Copyright (c) 2007-2009 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 "directgdidriver.h"
sl@0: #include <graphics/directgdiimagetarget.h>
sl@0: #include "directgdipaniccodes.h"
sl@0: 
sl@0: /**
sl@0: Default constructor. 
sl@0: Only for embedding instances of RDirectGdiImageTarget into other classes as data members. 
sl@0: Before a RDirectGdiImageTarget can be used the other constructor must be called. 
sl@0: */
sl@0: EXPORT_C RDirectGdiImageTarget::RDirectGdiImageTarget()
sl@0: 	: iDriver(NULL), iHandle(KNullHandle)
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Constructor.
sl@0: 
sl@0: @param 	aDriver The CDirectGdiDriver for this thread.
sl@0: 
sl@0: @pre 	CDirectGdiDriver object has been initialised from the calling thread.
sl@0: @post 	This handle class has a pointer to the CDirectGdiDriver object for this
sl@0: 		thread, and is not associated with any DirectGDI adaptation specific resource.
sl@0: */
sl@0: EXPORT_C RDirectGdiImageTarget::RDirectGdiImageTarget(CDirectGdiDriver& aDriver)
sl@0: 	: iDriver(&aDriver), iHandle(KNullHandle)
sl@0: 	{
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Creates a DirectGDI adaptation-specific resource from the given image resource
sl@0: so it can be used as a target of DirectGDI rendering.
sl@0: 
sl@0: @param 	aImage The image resource.
sl@0: 
sl@0: @pre 	The CDirectGdiDriver object has been set. The image resource has been
sl@0: 		fully constructed and created with the correct usage that allows it to
sl@0: 		be used as a DirectGDI target.
sl@0: @post 	The DirectGDI adaptation-specific resource that is bound to the given
sl@0: 		image resource is created and this handle is now associated with it.
sl@0: 		The reference counter on the image resource is incremented.
sl@0: 
sl@0: @return KErrNone if successful, KErrArgument if the image resource is not valid,
sl@0: 		KErrAlreadyExists if this handle is already associated with a DirectGDI
sl@0: 		specific resource,  KErrNotSupported if the image resource is not created
sl@0: 		with the correct usage, otherwise one of the system-wide error codes.
sl@0: */
sl@0: EXPORT_C TInt RDirectGdiImageTarget::Create(const RSgImage& aImage)
sl@0: 	{
sl@0: 	GRAPHICS_ASSERT_ALWAYS(iDriver, EDirectGdiPanicImageTargetWithoutDriver);
sl@0: 	return iDriver->CreateImageTarget(*this, aImage);
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Destroys the DirectGDI adaptation-specific resource associated with this handle. 
sl@0: Calling this method on a handle that is not associated with any DirectGDI 
sl@0: adaptation-specific resource will do nothing. Once Close() is called, this handle can be reused.
sl@0: 
sl@0: @pre	The CDirectGdiDriver object for this handle has been set.
sl@0: @post	The DirectGDI specific resource associated with this handle will be destroyed
sl@0: 		(at any time preferred by the adaptation). This handle is no longer associated
sl@0: 		with a DirectGDI specific resource. The reference counter of the underlying
sl@0: 		image resource is decremented. 
sl@0: */
sl@0: EXPORT_C void RDirectGdiImageTarget::Close()
sl@0: 	{
sl@0: 	if (iHandle != KNullHandle)
sl@0: 		{
sl@0: 		GRAPHICS_ASSERT_ALWAYS(iDriver, EDirectGdiPanicImageTargetWithoutDriver);
sl@0: 		iDriver->CloseImageTarget(*this);
sl@0: 		}
sl@0: 	}