From 58e86733e61b771bc7e7a05b28f87dcf418de923 Mon Sep 17 00:00:00 2001
From: Jim Mathies <jmathies@mozilla.com>
Date: Wed, 9 Feb 2011 16:37:58 -0600
Subject: [PATCH] Bug 594821 - Sync update top level windows when they are
 first shown. r=roc, a=final.

---
 widget/src/windows/nsWindow.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/widget/src/windows/nsWindow.cpp b/widget/src/windows/nsWindow.cpp
index 7a2147608a8..a83f0ee8e61 100644
--- a/widget/src/windows/nsWindow.cpp
+++ b/widget/src/windows/nsWindow.cpp
@@ -1224,6 +1224,8 @@ NS_METHOD nsWindow::Show(PRBool bState)
   }
 #endif
 
+  PRBool syncInvalidate = PR_FALSE;
+
   PRBool wasVisible = mIsVisible;
   // Set the status now so that anyone asking during ShowWindow or
   // SetWindowPos would get the correct answer.
@@ -1236,6 +1238,9 @@ NS_METHOD nsWindow::Show(PRBool bState)
   if (mWnd) {
     if (bState) {
       if (!wasVisible && mWindowType == eWindowType_toplevel) {
+        // speed up the initial paint after show for
+        // top level windows:
+        syncInvalidate = PR_TRUE;
         switch (mSizeMode) {
 #ifdef WINCE
           case nsSizeMode_Fullscreen:
@@ -1320,7 +1325,7 @@ NS_METHOD nsWindow::Show(PRBool bState)
   
 #ifdef MOZ_XUL
   if (!wasVisible && bState)
-    Invalidate(PR_FALSE);
+    Invalidate(syncInvalidate);
 #endif
 
   return NS_OK;