1 files changed, 10 insertions, 2 deletions
diff --git a/core/java/android/view/HardwareLayer.java b/core/java/android/view/HardwareLayer.java
index 18b838b..23383d9 100644
--- a/core/java/android/view/HardwareLayer.java
+++ b/core/java/android/view/HardwareLayer.java
@@ -158,14 +158,22 @@ abstract class HardwareLayer {
     /**
      * This must be invoked before drawing onto this layer.
      *
-     * @param currentCanvas
+     * @param currentCanvas The canvas whose rendering needs to be interrupted
      */
     abstract HardwareCanvas start(Canvas currentCanvas);
 
     /**
+     * This must be invoked before drawing onto this layer.
+     *
+     * @param dirty The dirty area to repaint
+     * @param currentCanvas The canvas whose rendering needs to be interrupted
+     */
+    abstract HardwareCanvas start(Canvas currentCanvas, Rect dirty);
+
+    /**
      * This must be invoked after drawing onto this layer.
      *
-     * @param currentCanvas
+     * @param currentCanvas The canvas whose rendering needs to be resumed
      */
     abstract void end(Canvas currentCanvas);