From 1b3d4773a3c04c790e1928e75c2b195cabdfadec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=BCrg=20Lehni?= <juerg@scratchdisk.com>
Date: Fri, 8 Jul 2011 21:01:34 +0200
Subject: [PATCH] Optimise hit-testing by checking point to lie within
 #roughBounds + tolerance first.

---
 src/item/Item.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/item/Item.js b/src/item/Item.js
index 3f4ab185..37c36293 100644
--- a/src/item/Item.js
+++ b/src/item/Item.js
@@ -670,6 +670,12 @@ var Item = this.Item = Base.extend(/** @lends Item# */{
 
 	hitTest: function(point, options, matrix) {
 		options = HitResult.getOptions(options);
+		// Check if the point is withing roughBounds + tolerance, but only if
+		// this item does not have children, since we'd have to travel up the
+		// chain already to determine the rough bounds.
+		if (!this._children && !this.getRoughBounds(matrix)
+				.expand(options.tolerance).contains(point))
+			return null;
 		// TODO: Support option.type even for things like CompoundPath where
 		// children are matched but the parent is returned.