src/share/classes/sun/awt/LightweightFrame.java

*** 122,127 ****
--- 122,143 ----
       * The method is called by the AWT grab machinery.
       *
       * @see SunToolkit#ungrab(java.awt.Window)
       */
      public abstract void ungrabFocus();
+     
+     /**
+      * Returns the scale factor set with the {@link #setScaleFactor} method.
+      * The default value is 1.
+      * 
+      * @return the scale factor
+      */
+     public abstract int getScaleFactor();
+     
+     /**
+      * Sets the scale factor which defines the HiDPI resolution
+      * of the offscreen buffer the frame is painted to.
+      * 
+      * @param scale the factor
+      */
+     public abstract void setScaleFactor(int scale);    
  }