From 20ce11875dc27c7399e3f5bf2a060e2c7cbeaad7 Mon Sep 17 00:00:00 2001
From: jpbruyere <jp.bruyere@hotmail.com>
Date: Fri, 3 Mar 2017 14:21:10 +0100
Subject: [PATCH] discard RegisterClip in higher levels if parent is dirty and
 parent cache is enabled

---
 src/GraphicObjects/GraphicObject.cs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/GraphicObjects/GraphicObject.cs b/src/GraphicObjects/GraphicObject.cs
index ff4b3124..2afbe336 100644
--- a/src/GraphicObjects/GraphicObject.cs
+++ b/src/GraphicObjects/GraphicObject.cs
@@ -856,8 +856,12 @@ namespace Crow
 		public virtual void RegisterClip(Rectangle clip){
 			if (CacheEnabled && !IsDirty)
 				Clipping.AddRectangle (clip + ClientRectangle.Position);
-			if (Parent != null)
-				Parent.RegisterClip (clip + Slot.Position + ClientRectangle.Position);
+			if (Parent == null)
+				return;
+			GraphicObject p = Parent as GraphicObject;
+			if (p?.IsDirty == true && p?.CacheEnabled == true)
+				return;
+			Parent.RegisterClip (clip + Slot.Position + ClientRectangle.Position);
 		}
 		/// <summary> Full update, taking care of sizing policy </summary>
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
-- 
2.47.3