8332895: Support interpolation for backgrounds and borders

modules/javafx.graphics/src/main/java/com/sun/javafx/scene/layout/region/BorderImageSlices.java

@@ -25,7 +25,7 @@
 
 package com.sun.javafx.scene.layout.region;
 
-import com.sun.javafx.util.Utils;
+import com.sun.javafx.util.InterpolationUtils;
 import javafx.animation.Interpolatable;
 import javafx.scene.layout.BorderWidths;
 import java.util.Objects;
@@ -69,7 +69,7 @@ public BorderImageSlices interpolate(BorderImageSlices endValue, double t) {
 
         return new BorderImageSlices(
             widths.interpolate(endValue.widths, t),
-            Utils.interpolateDiscrete(filled, endValue.filled, t));
+            InterpolationUtils.interpolateDiscrete(filled, endValue.filled, t));
     }
 
     @Override

modules/javafx.graphics/src/main/java/com/sun/javafx/scene/layout/region/Margins.java

@@ -25,6 +25,7 @@
 
 package com.sun.javafx.scene.layout.region;
 
+import com.sun.javafx.util.InterpolationUtils;
 import javafx.animation.Interpolatable;
 import javafx.scene.text.Font;
 import javafx.css.Size;
@@ -33,7 +34,6 @@
 import javafx.css.StyleConverter;
 import com.sun.javafx.logging.PlatformLogger;
 import com.sun.javafx.logging.PlatformLogger.Level;
-import com.sun.javafx.util.Utils;
 import java.util.Objects;
 
 /**
@@ -85,14 +85,14 @@ public Margins interpolate(Margins endValue, double t) {
         }
 
         if (proportional != endValue.proportional) {
-            return Utils.interpolateDiscrete(this, endValue, t);
+            return InterpolationUtils.interpolateDiscrete(this, endValue, t);
         }
 
         return new Margins(
-            Utils.interpolate(top, endValue.top, t),
-            Utils.interpolate(right, endValue.right, t),
-            Utils.interpolate(bottom, endValue.bottom, t),
-            Utils.interpolate(left, endValue.left, t),
+            InterpolationUtils.interpolate(top, endValue.top, t),
+            InterpolationUtils.interpolate(right, endValue.right, t),
+            InterpolationUtils.interpolate(bottom, endValue.bottom, t),
+            InterpolationUtils.interpolate(left, endValue.left, t),
             proportional);
     }