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

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403562

src/video/win32/SDL_win32events.c

@@ -570,6 +570,17 @@ WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
         }
         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:
         {