diff -r 000000000000 -r 5d03bc08d59c graphicsdeviceinterface/screendriver/inc/CoordTransformation.inl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graphicsdeviceinterface/screendriver/inc/CoordTransformation.inl	Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,42 @@
+// Copyright (c) 2004-2009 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:
+// Converts logical coordinate value to physical coordinate value.
+// Then adjusts the value, assuming that it must be within the drawing rectangle.
+// The first, "<0" check is arguable - should it be there or not!?
+// Because it HIDES negative values of "x" coordinate, so possible programmer's errors!
+// But with used logical to physical transformation it is possible that some logical
+// coordinate value might be transformed to negative physical coordinate value and 
+// then it has to be checked and set to 0.
+// 
+//
+
+inline TInt Log2Phys(TInt aCoordVal, TInt aScalingOrigin, TInt aScalingFactor, TInt aSize) 
+	{
+	aCoordVal = aScalingOrigin + aCoordVal * aScalingFactor;
+	return aCoordVal < 0 ? 0 : aCoordVal >= aSize ? (aSize - 1) : aCoordVal;
+	}
+
+//Converts logical coordinate value to physical coordinate value.
+//Then adjusts the value, assuming that it represents right-bottom coordinate of the logical 
+//rectangle. The first, "<0" check is arguable - should it be there or not!?
+//Because it HIDES negative values of "x" coordinate, so possible programmer's errors!
+//But with used logical to physical transformation it is possible that some logical
+//coordinate value is transformed to negative physical coordinate value and then it has to
+//be checked and set to 0.
+inline TInt RBtmLog2Phys(TInt aCoordVal, TInt aScalingOrigin, TInt aScalingFactor, TInt aSize) 
+	{
+	aCoordVal = aScalingOrigin + aCoordVal * aScalingFactor;
+	return aCoordVal < 0 ? 0 : aCoordVal > aSize ? aSize : aCoordVal;
+	}
+