From dc9123210dc734c2edb01d5fe5a4693c6f626d18 Mon Sep 17 00:00:00 2001
From: fayjf <fayjf@7f0cb862-5218-0410-a997-914c9d46530a>
Date: Tue, 25 Jan 2011 05:17:12 +0000
Subject: [PATCH] Fixing bug report 3021598 by modifying "glutSetWindow" under
 Windows so that it only releases and gets the device context if the window is
 being set to a new window

git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@888 7f0cb862-5218-0410-a997-914c9d46530a
---
 freeglut/freeglut/src/freeglut_window.c | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/freeglut/freeglut/src/freeglut_window.c b/freeglut/freeglut/src/freeglut_window.c
index e9da324..3513498 100644
--- a/freeglut/freeglut/src/freeglut_window.c
+++ b/freeglut/freeglut/src/freeglut_window.c
@@ -812,17 +812,20 @@ void fgSetWindow ( SFG_Window *window )
         );
     }
 #elif TARGET_HOST_MS_WINDOWS
-    if( fgStructure.CurrentWindow )
-        ReleaseDC( fgStructure.CurrentWindow->Window.Handle,
-                   fgStructure.CurrentWindow->Window.Device );
-
-    if ( window )
+    if ( window != fgStructure.CurrentWindow )
     {
-        window->Window.Device = GetDC( window->Window.Handle );
-        wglMakeCurrent(
-            window->Window.Device,
-            window->Window.Context
-        );
+        if( fgStructure.CurrentWindow )
+            ReleaseDC( fgStructure.CurrentWindow->Window.Handle,
+                       fgStructure.CurrentWindow->Window.Device );
+
+        if ( window )
+        {
+            window->Window.Device = GetDC( window->Window.Handle );
+            wglMakeCurrent(
+                window->Window.Device,
+                window->Window.Context
+            );
+        }
     }
 #endif
     fgStructure.CurrentWindow = window;