src/macosx/classes/sun/lwawt/macosx/CPlatformLWWindow.java

@@ -27,16 +27,22 @@
 
 import java.awt.Font;
 import java.awt.FontMetrics;
 import java.awt.Graphics;
 import java.awt.GraphicsDevice;
+import java.awt.GraphicsEnvironment;
 import java.awt.Insets;
 import java.awt.MenuBar;
 import java.awt.Point;
+import java.awt.Rectangle;
 import java.awt.Window;
+import sun.awt.CGraphicsDevice;
+import sun.awt.CGraphicsEnvironment;
 import sun.awt.CausedFocusEvent;
+import sun.awt.LightweightFrame;
 import sun.java2d.SurfaceData;
+import sun.lwawt.LWLightweightFramePeer;
 import sun.lwawt.LWWindowPeer;
 import sun.lwawt.PlatformWindow;
 
 public class CPlatformLWWindow extends CPlatformWindow {
 

@@ -71,15 +77,10 @@
     public Point getLocationOnScreen() {
         return null;
     }
 
     @Override
-    public GraphicsDevice getGraphicsDevice() {
-        return null;
-    }
-
-    @Override
     public SurfaceData getScreenSurface() {
         return null;
     }
 
     @Override

@@ -197,6 +198,26 @@
 
     @Override
     public long getLayerPtr() {
         return 0;
     }
+    
+    @Override
+    public GraphicsDevice getGraphicsDevice() {        
+        CGraphicsEnvironment ge = (CGraphicsEnvironment)GraphicsEnvironment.
+                                  getLocalGraphicsEnvironment();
+        
+        LWLightweightFramePeer peer = (LWLightweightFramePeer)getPeer();        
+        int scale = ((LightweightFrame)peer.getTarget()).getScaleFactor();
+
+        Rectangle bounds = ((LightweightFrame)peer.getTarget()).getHostBounds();
+        for (GraphicsDevice d : ge.getScreenDevices()) {
+            if (d.getDefaultConfiguration().getBounds().intersects(bounds) &&
+                ((CGraphicsDevice)d).getScaleFactor() == scale)
+            {
+                return d;
+            }
+        }
+        // We shouldn't be here...
+        return ge.getDefaultScreenDevice();
+    }    
 }