src/java.desktop/windows/classes/sun/awt/windows/TranslucentWindowPainter.java

*** 28,37 ****
--- 28,38 ----
  import java.awt.Color;
  import java.awt.Graphics2D;
  import java.awt.GraphicsConfiguration;
  import java.awt.Image;
  import java.awt.Window;
+ import java.awt.geom.AffineTransform;
  import java.awt.image.BufferedImage;
  import java.awt.image.DataBufferInt;
  import java.awt.image.VolatileImage;
  import java.security.AccessController;
  import sun.awt.image.BufImgSurfaceData;
*** 43,52 ****
--- 44,54 ----
  import sun.java2d.pipe.hw.AccelGraphicsConfig;
  import sun.java2d.pipe.hw.AccelSurface;
  import sun.security.action.GetPropertyAction;
  
  import static java.awt.image.VolatileImage.*;
+ import sun.java2d.pipe.Region;
  import static sun.java2d.pipe.hw.AccelSurface.*;
  import static sun.java2d.pipe.hw.ContextCapabilities.*;
  
  /**
   * This class handles the updates of the non-opaque windows.
*** 250,263 ****
              super(peer);
          }
  
          @Override
          protected Image getBackBuffer(boolean clear) {
!             int w = window.getWidth();
!             int h = window.getHeight();
              GraphicsConfiguration gc = peer.getGraphicsConfiguration();
  
              if (viBB == null || viBB.getWidth() != w || viBB.getHeight() != h ||
                  viBB.validate(gc) == IMAGE_INCOMPATIBLE)
              {
                  flush();
  
--- 252,268 ----
              super(peer);
          }
  
          @Override
          protected Image getBackBuffer(boolean clear) {
!             
              GraphicsConfiguration gc = peer.getGraphicsConfiguration();
           
+             AffineTransform tx = gc.getDefaultTransform();
+             int w = Region.clipScale(window.getWidth(), tx.getScaleX());
+             int h = Region.clipScale(window.getHeight(), tx.getScaleY());
+             
              if (viBB == null || viBB.getWidth() != w || viBB.getHeight() != h ||
                  viBB.validate(gc) == IMAGE_INCOMPATIBLE)
              {
                  flush();