Add Shadow feature

bug:7234321
Change-Id: Ib0d4db773486e469ed818385b68b7b907070c297
diff --git a/src/com/android/gallery3d/filtershow/ui/ControlPoint.java b/src/com/android/gallery3d/filtershow/ui/ControlPoint.java
index 6daa961..68b799a 100644
--- a/src/com/android/gallery3d/filtershow/ui/ControlPoint.java
+++ b/src/com/android/gallery3d/filtershow/ui/ControlPoint.java
@@ -1,7 +1,7 @@
 
 package com.android.gallery3d.filtershow.ui;
 
-class ControlPoint implements Comparable {
+public class ControlPoint implements Comparable {
     public ControlPoint(float px, float py) {
         x = px;
         y = py;