From 6a2cc6a16fe7a02a8b8187f56174f36292df726f Mon Sep 17 00:00:00 2001
From: Ray Greenwell <ray@threerings.net>
Date: Tue, 5 Nov 2002 18:52:11 +0000
Subject: [PATCH] optimize common case of having no dirty rectangles

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1902 542714f4-19e9-0310-aa3c-eee0fc999fb1
---
 src/java/com/threerings/media/FrameRepaintManager.java | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/java/com/threerings/media/FrameRepaintManager.java b/src/java/com/threerings/media/FrameRepaintManager.java
index c7fe2fa41..fe7bad7fd 100644
--- a/src/java/com/threerings/media/FrameRepaintManager.java
+++ b/src/java/com/threerings/media/FrameRepaintManager.java
@@ -1,5 +1,5 @@
 //
-// $Id: FrameRepaintManager.java,v 1.14 2002/11/05 05:49:31 mdb Exp $
+// $Id: FrameRepaintManager.java,v 1.15 2002/11/05 18:52:11 ray Exp $
 
 package com.threerings.media;
 
@@ -219,8 +219,13 @@ public class FrameRepaintManager extends RepaintManager
      */
     public void paintComponents (Graphics g, FrameManager fmgr)
     {
-        // swap out our hashmap
         synchronized (this) {
+            // exit now if there are no dirty rectangles to paint
+            if (_dirty.isEmpty()) {
+                return;
+            }
+
+            // otherwise, swap our hashmaps
             HashMap tmap = _spare;
             _spare = _dirty;
             _dirty = tmap;