diff -r 000000000000 -r 5d03bc08d59c graphicsdeviceinterface/screendriver/inc/cdsb.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graphicsdeviceinterface/screendriver/inc/cdsb.h	Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,118 @@
+// Copyright (c) 1996-2009 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 __CDSB_H__
+#define __CDSB_H__
+
+#include <e32base.h>
+#include <bitdev.h>
+
+/**
+Direct Screen Bitmap.
+API to allow provide synchronisation of the display of images with the
+displays refresh to prevent tearing.
+ 
+This is an abstract base class, so must be derived from on a per-variant basis.
+
+@publishedPartner
+@released
+
+Note: this class is likely to be deprecated in the future
+*/ 
+class CDirectScreenBitmap : public CBase
+	{
+public:
+	enum TSettingsFlags
+		{
+		ENone = 0,
+		EDoubleBuffer = 1,
+		EIncrementalUpdate = 2
+		};
+
+public:
+	/**
+	Constructs a CDirectScreenBitmap derived object.
+    The default screen (with number 0) will be used.
+    @return A pointer to the created CDirectScreenBitmap object
+    @leave KErrNoMemory There was insufficient memory to allocate the CDirectScreenBitmap derived object
+	*/
+	IMPORT_C static CDirectScreenBitmap* NewL();	
+
+	/**
+	Constructs a CDirectScreenBitmap derived object.
+	@param aScreenNo Screen number, used by the CDirectScreenBitmap object.
+    @return A pointer to the created CDirectScreenBitmap object
+    @leave KErrNoMemory There was insufficient memory to allocate the CDirectScreenBitmap derived object
+	*/
+	IMPORT_C static CDirectScreenBitmap* NewL(TInt aScreenNo);	
+
+    /**
+	Creates a CDirectScreenBitmap object which can be used for drawing to
+	a region of the screen indicated by aScreenRect.  This region must have
+	previously been 'claimed' via the Window Servers Direct Screen Access API.
+
+	@param aScreenRect The region to be displayed
+	@param aSettingsFlags The mode of operation. The upper 3 bits are used 
+                          for the screen number value: 0..7.  By default the screen 
+                          with  number 0 will be used.
+	@return KErrNone if successful
+	        KErrNoMemory if there was insufficient memory
+	        KErrNotSupported if the creation failed for other reasons
+	*/
+	virtual TInt Create(const TRect& aScreenRect, TSettingsFlags aSettingsFlags) =0;
+
+	/**
+	Returns a TAcceleratedBitmapInfo referring to a bitmap which the
+	applicationcan render to.
+
+	@param aBitmapInfo The Bitmap
+	@return KErrNone if successful, another error code otherwise
+	*/
+	virtual TInt BeginUpdate(TAcceleratedBitmapInfo& aBitmapInfo) =0;
+
+	/**
+	Indicates to the Video Driver that the bitmap corresponding to the
+	update has been fully rendered.  The video driver will perform
+	the actions required to copy this to the frame buffer.
+
+	The request status aComplete will be signalled when the copying has completed.
+	
+	@param aComplete Asynchronous completion status
+	*/
+	virtual void EndUpdate(TRequestStatus& aComplete) =0;
+
+	/**
+	Indicates to the Video Driver that the area indicated in aScreenRect has
+	been fully rendered.  The video driver will perform the actions required 
+	to copy this to the frame buffer.
+	
+	The request status aComplete will be signalled when the copying has completed.
+	
+	Note: aScreenRects coordinates are relative to the screen, not the update region specified
+	in Create().  aScreenRect must fit entirely within the bounds of the original region passed
+	to Create().
+
+	@param aScreenRect The region to update
+	@param aComplete Asynchronous completion status
+	*/
+	virtual void EndUpdate(const TRect& aScreenRect, TRequestStatus& aComplete) =0;
+
+	/**
+	Deletes all resources associated with the CDirectScreenBitmap object.
+	*/
+	virtual void Close() =0;
+	};
+
+#endif