--- old/src/java.desktop/windows/classes/sun/awt/Win32GraphicsDevice.java	2015-10-22 07:46:56.579438700 -0700
+++ new/src/java.desktop/windows/classes/sun/awt/Win32GraphicsDevice.java	2015-10-22 07:46:56.220034800 -0700
@@ -37,13 +37,19 @@
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.awt.event.WindowListener;
+import java.awt.geom.Point2D;
 import java.awt.image.ColorModel;
 import java.util.ArrayList;
 import java.util.Vector;
 import java.awt.peer.WindowPeer;
+import java.security.AccessController;
 import sun.awt.windows.WWindowPeer;
+import sun.java2d.SunGraphicsEnvironment;
 import sun.java2d.opengl.WGLGraphicsConfig;
 import sun.java2d.windows.WindowsFlags;
+import sun.security.action.GetPropertyAction;
+import static sun.awt.Win32GraphicsEnvironment.debugScaleX;
+import static sun.awt.Win32GraphicsEnvironment.debugScaleY;
 
 /**
  * This is an implementation of a GraphicsDevice object for a single
@@ -81,6 +87,9 @@
     // activation/deactivation listener for the full-screen window
     private WindowListener fsWindowListener;
 
+    private float scaleX = 1.0f;
+    private float scaleY = 1.0f;
+
     static {
 
         // 4455041 - Even when ddraw is disabled, ddraw.dll is loaded when
@@ -97,6 +106,10 @@
     private static native void initIDs();
 
     native void initDevice(int screen);
+    native void initNativeScale(int screen);
+    native void setNativeScale(int screen, float scaleX, float scaleY);
+    native float getNativeScaleX(int screen);
+    native float getNativeScaleY(int screen);
 
     public Win32GraphicsDevice(int screennum) {
         this.screen = screennum;
@@ -109,6 +122,7 @@
         valid = true;
 
         initDevice(screennum);
+        initScaleFactors();
     }
 
     /**
@@ -128,6 +142,28 @@
         return screen;
     }
 
+    public float getDefaultScaleX() {
+        return scaleX;
+    }
+
+    public float getDefaultScaleY() {
+        return scaleY;
+    }
+
+    private void initScaleFactors() {
+        if (SunGraphicsEnvironment.isUIScaleEnabled()) {
+            if (debugScaleX > 0 && debugScaleY > 0) {
+                scaleX = debugScaleX;
+                scaleY = debugScaleY;
+                setNativeScale(screen, scaleX, scaleY);
+            } else {
+                initNativeScale(screen);
+                scaleX = getNativeScaleX(screen);
+                scaleY = getNativeScaleY(screen);
+            }
+        }
+    }
+
     /**
      * Returns whether this is a valid devicie. Device can become
      * invalid as a result of device removal event.
@@ -486,6 +522,7 @@
         configs = null;
         // pass on to all top-level windows on this display
         topLevels.notifyListeners();
+        initScaleFactors();
     }
 
     /**