diff -r 000000000000 -r bde4ae8d615e os/graphics/graphicsresourceservices/graphicsresourceadaptation/inc/sgimage_chunk.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/graphics/graphicsresourceservices/graphicsresourceadaptation/inc/sgimage_chunk.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,73 @@
+// 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:
+//
+
+/**
+ @file
+ @internalTechnology
+ @prototype
+*/
+
+#ifndef SGIMAGE_CHUNK_H
+#define SGIMAGE_CHUNK_H
+
+#include <e32std.h>
+
+
+/**
+@internalTechnology
+@prototype
+
+This interface allows access to the data chunk where an image is stored. The chunk
+handle obtained through this interface can be passed to device drivers that need
+access to the pixel data of the image.
+
+This interface is only supported if the image is stored in a shared chunk.
+*/
+class MSgImage_Chunk
+	{
+public:
+	enum { EInterfaceUid = 0x102858F1 };
+	/**
+	@internalTechnology
+	@prototype
+
+	Retrieves a handle to the chunk where the pixel data is stored. The returned
+	chunk handle is valid until the RSgImage handle is closed.
+
+	@return A handle to the chunk where the pixel data is stored.
+	*/
+	virtual const RChunk& DataChunk() const = 0;
+	/**
+	@internalTechnology
+	@prototype
+
+	Retrieves the base offset of the pixel data from the base of the chunk.
+
+	@return The base offset of the pixel data from the base of the chunk.
+	*/
+	virtual TInt DataOffset() const = 0;
+	/**
+	@internalTechnology
+	@prototype
+
+	Retrieves the number of bytes between rows of the pixel data in the chunk.
+
+	@return The number of bytes between rows of the pixel data in the chunk.
+	*/
+	virtual TInt DataStride() const = 0;
+	};
+
+
+#endif // SGIMAGE_CHUNK_H