src/java.desktop/macosx/classes/sun/awt/CGraphicsDevice.java

*** 30,40 ****
  import java.awt.GraphicsConfiguration;
  import java.awt.GraphicsDevice;
  import java.awt.Insets;
  import java.awt.Window;
  import java.util.Objects;
! 
  import sun.java2d.opengl.CGLGraphicsConfig;
  
  public final class CGraphicsDevice extends GraphicsDevice
          implements DisplayChangedListener {
  
--- 30,40 ----
  import java.awt.GraphicsConfiguration;
  import java.awt.GraphicsDevice;
  import java.awt.Insets;
  import java.awt.Window;
  import java.util.Objects;
! import sun.java2d.SunGraphicsEnvironment;
  import sun.java2d.opengl.CGLGraphicsConfig;
  
  public final class CGraphicsDevice extends GraphicsDevice
          implements DisplayChangedListener {
  
*** 138,148 ****
  
      @Override
      public void displayChanged() {
          xResolution = nativeGetXResolution(displayID);
          yResolution = nativeGetYResolution(displayID);
!         scale = (int) nativeGetScaleFactor(displayID);
          //TODO configs/fullscreenWindow/modes?
      }
  
      @Override
      public void paletteChanged() {
--- 138,148 ----
  
      @Override
      public void displayChanged() {
          xResolution = nativeGetXResolution(displayID);
          yResolution = nativeGetYResolution(displayID);
!         initScaleFactor();
          //TODO configs/fullscreenWindow/modes?
      }
  
      @Override
      public void paletteChanged() {
*** 247,256 ****
--- 247,267 ----
      @Override
      public DisplayMode[] getDisplayModes() {
          return nativeGetDisplayModes(displayID);
      }
      
+     private void initScaleFactor() {
+         if (SunGraphicsEnvironment.isUIScaleEnabled()) {
+             double debugScale = SunGraphicsEnvironment.getDebugScale();
+             scale = (int) (debugScale >= 1
+                     ? Math.round(debugScale)
+                     : nativeGetScaleFactor(displayID));
+         } else {
+             scale = 1;
+         }
+     }
+ 
      private static native double nativeGetScaleFactor(int displayID);
  
      private static native void nativeSetDisplayMode(int displayID, int w, int h, int bpp, int refrate);
  
      private static native DisplayMode nativeGetDisplayMode(int displayID);