src/java.desktop/unix/classes/sun/awt/X11GraphicsDevice.java

*** 279,289 ****
                                                  ArrayList<DisplayMode> modes);
      private static native void configDisplayMode(int screen,
                                                   int width, int height,
                                                   int displayMode);
      private static native void resetNativeData(int screen);
!     private static native int getNativeScaleFactor(int screen);
  
      /**
       * Returns true only if:
       *   - the Xrandr extension is present
       *   - the necessary Xrandr functions were loaded successfully
--- 279,289 ----
                                                  ArrayList<DisplayMode> modes);
      private static native void configDisplayMode(int screen,
                                                   int width, int height,
                                                   int displayMode);
      private static native void resetNativeData(int screen);
!     private static native double getNativeScaleFactor(int screen);
  
      /**
       * Returns true only if:
       *   - the Xrandr extension is present
       *   - the necessary Xrandr functions were loaded successfully
*** 514,534 ****
  
      public int getScaleFactor() {
          return scale;
      }
  
      private int initScaleFactor() {
  
          if (SunGraphicsEnvironment.isUIScaleEnabled()) {
  
              double debugScale = SunGraphicsEnvironment.getDebugScale();
  
              if (debugScale >= 1) {
                  return (int) debugScale;
              }
! 
!             int nativeScale = getNativeScaleFactor(screen);
              return nativeScale >= 1 ? nativeScale : 1;
          }
  
          return 1;
      }
--- 514,538 ----
  
      public int getScaleFactor() {
          return scale;
      }
  
+     public int getNativeScale() {
+         isXrandrExtensionSupported();
+         return (int)Math.round(getNativeScaleFactor(screen));
+     }
+ 
      private int initScaleFactor() {
  
          if (SunGraphicsEnvironment.isUIScaleEnabled()) {
  
              double debugScale = SunGraphicsEnvironment.getDebugScale();
  
              if (debugScale >= 1) {
                  return (int) debugScale;
              }
!             int nativeScale = getNativeScale();
              return nativeScale >= 1 ? nativeScale : 1;
          }
  
          return 1;
      }