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

*** 28,45 ****
--- 28,47 ----
  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;
  import sun.java2d.DestSurfaceProvider;
  import sun.java2d.InvalidPipeException;
  import sun.java2d.Surface;
+ import sun.java2d.pipe.Region;
  import sun.java2d.pipe.RenderQueue;
  import sun.java2d.pipe.BufferedContext;
  import sun.java2d.pipe.hw.AccelGraphicsConfig;
  import sun.java2d.pipe.hw.AccelSurface;
  import sun.security.action.GetPropertyAction;
*** 176,193 ****
              super(peer);
          }
  
          @Override
          protected Image getBackBuffer(boolean clear) {
!             int w = window.getWidth();
!             int h = window.getHeight();
              if (backBuffer == null ||
                  backBuffer.getWidth() != w ||
                  backBuffer.getHeight() != h)
              {
                  flush();
!                 backBuffer = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB_PRE);
              }
              return clear ? (BufferedImage)clearImage(backBuffer) : backBuffer;
          }
  
          @Override
--- 178,200 ----
              super(peer);
          }
  
          @Override
          protected Image getBackBuffer(boolean clear) {
!             GraphicsConfiguration gc = peer.getGraphicsConfiguration();
!             AffineTransform transform = gc.getDefaultTransform();
!             int w = Region.clipRound(
!                     window.getWidth() * transform.getScaleX());
!             int h = Region.clipRound(
!                     window.getHeight() * transform.getScaleY());
              if (backBuffer == null ||
                  backBuffer.getWidth() != w ||
                  backBuffer.getHeight() != h)
              {
                  flush();
!                 backBuffer = new BufferedImage(gc, w, h, BufferedImage
!                         .TYPE_INT_ARGB_PRE);
              }
              return clear ? (BufferedImage)clearImage(backBuffer) : backBuffer;
          }
  
          @Override