From 4c0a170585d5c8a1f3508ac55f799ebaf86e91db Mon Sep 17 00:00:00 2001
From: Mathias Agopian <mathias@google.com>
Date: Fri, 31 Aug 2012 12:45:33 -0700
Subject: [PATCH] don't generate a new Region when translating by 0,0

since regions are copy-on-write, this prevents to
duplicate the region entirely and offseting by 0,0 is
fairly common.

Change-Id: I9b8c286315a2e00dda01c2456397d72b5e12006b
---
 libs/ui/Region.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/ui/Region.cpp b/libs/ui/Region.cpp
index a3d8b01b8..2569ae174 100644
--- a/libs/ui/Region.cpp
+++ b/libs/ui/Region.cpp
@@ -529,7 +529,7 @@ void Region::boolean_operation(int op, Region& dst,
 
 void Region::translate(Region& reg, int dx, int dy)
 {
-    if (!reg.isEmpty()) {
+    if ((dx || dy) && !reg.isEmpty()) {
 #if VALIDATE_REGIONS
         validate(reg, "translate (before)");
 #endif