diff -r 000000000000 -r 5d03bc08d59c windowing/windowserver/inc/Graphics/wsuibuffer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/windowing/windowserver/inc/Graphics/wsuibuffer.h	Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,121 @@
+// Copyright (c) 2008-2009 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:
+//
+
+#ifndef __WSUIBUFFER_H__
+#define __WSUIBUFFER_H__
+
+#include <pixelformats.h>
+#include <graphics/wsgraphicdrawerinterface.h>
+
+/**
+@file
+@publishedPartner
+@prototype 
+*/
+
+/**
+This class provides direct access to the memory of the UI buffer.
+
+This interface is to be used by CRPs that don't want to go through MWsGraphicsContext
+to handle their rendering, but want direct memory access.
+@publishedPartner
+@prototype
+*/
+class MWsUiBuffer: public MWsObjectProvider
+    {
+public:
+    DECLARE_WS_TYPE_ID(KMWsUiBufferInterfaceId)
+
+    /**
+    Finishes pending rendering to the buffer and temporarily makes the pixel 
+    data of the buffer image accessible for reading and writing by the CPU.
+    
+    When finished with the pixel data, the caller must end the mapping by
+    calling @c Unmap().
+
+    This method should only be called from the context of 
+    @c CWsGraphicDrawer::Draw().
+    @param aDataAddress On return, the base address of the pixel data in the
+    address space of the calling process
+    @param aDataStride On return, the number of bytes between rows of the
+    pixel data
+    @return KErrNone if successful, otherwise one of the standard Symbian
+    error codes
+    @see Unmap()
+    @publishedPartner
+    @prototype
+    */
+    virtual TInt MapReadWrite(TAny*& aDataAddress, TInt& aDataStride) = 0;
+    
+    /**
+    Finishes pending rendering to the buffer and temporarily makes the pixel 
+    data of the buffer image accessible for writing by the CPU.
+    
+    When finished with the pixel data, the caller must end the mapping by
+    calling @c Unmap().
+
+    This method should only be called from the context of 
+    @c CWsGraphicDrawer::Draw().
+    @param aDataAddress On return, the base address of the pixel data in the
+    address space of the calling process
+    @param aDataStride On return, the number of bytes between rows of the
+    pixel data
+    @return KErrNone if successful, otherwise one of the standard Symbian
+    error codes
+    @see Unmap()
+    @publishedPartner
+    @prototype
+    */
+    virtual TInt MapWriteOnly(TAny*& aDataAddress, TInt& aDataStride) = 0;
+        
+    /**
+    Makes the pixel data of an image no longer accessible to the CPU.
+
+    Before calling this method the buffer must be mapped for CPU access by
+    a previous call to @c MapReadWrite() or @c MapWriteOnly().
+
+    This method should only be called from the context of 
+    @c CWsGraphicDrawer::Draw().
+    @return KErrNone if successful, otherwise one of the standard Symbian
+    error codes
+    @see MapReadWrite()
+    @see MapWriteOnly()
+    @publishedPartner
+    @prototype
+    */
+    virtual TInt Unmap() = 0;
+
+    /**
+    Gets the pixel format of the buffer.
+    @return The pixel format of the buffer
+    @publishedPartner
+    @prototype
+    */
+    virtual TUidPixelFormat PixelFormat() const = 0;
+
+    /** 
+    Gets the current size of the buffer.
+
+    The actual size of the whole buffer might be larger than the returned
+    value depending on the current screen mode. However, it is the size
+    returned by this method that should be used when accessing the pixel data.
+    @return The current size of the buffer
+    @publishedPartner
+    @prototype
+    */
+    virtual TSize SizeInPixels() const = 0;
+    };
+
+#endif //__WSUiBUFFER_H__