# HG changeset patch
# User Sam Lantinga <slouken@libsdl.org>
# Date 1237773750 0
# Node ID 75483112b97f65fded98b31c22af3762f2f0a488
# Parent  c0ce3380742d728611d069f2620eae3dd2608a29
Date: Sat, 21 Mar 2009 19:41:52 -0700 (PDT)
From: Mason Wheeler
Subject: [SDL] Critical SDL 1.3 patch

Displaying a window created with SDL_CreateWindowFrom was causing stack overf
lows for me under certain conditions.  After far too much work trying to get
Visual Studio's debugger to play nice with a program written in Delphi, I tra
cked it down to a nasty reentrancy cycle in the WndProc handling.  Here's a p
atch that fixes the problem

diff -r c0ce3380742d -r 75483112b97f src/video/win32/SDL_win32events.c
--- a/src/video/win32/SDL_win32events.c	Sun Mar 22 06:56:37 2009 +0000
+++ b/src/video/win32/SDL_win32events.c	Mon Mar 23 02:02:30 2009 +0000
@@ -570,6 +570,17 @@
         }
         return (0);
 
+        /* If this isn't our window, we don't need to repaint the frame.
+           This fixes a reentrancy issue that can cause stack overflows with foreign windows.
+           3/21/09 Mason Wheeler */
+    case WM_NCPAINT:
+        {
+            if (SDL_GetWindowFlags(data->windowID) && SDL_WINDOW_FOREIGN) {
+                return(0);
+            }
+            break;
+        }
+
         /* We'll do our own drawing, prevent flicker */
     case WM_ERASEBKGND:
         {