From 4923c88bd03e79f68cbd0ebfa4cfc9ebb8a77ca5 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 18 Sep 2008 12:57:15 +0000
Subject: [PATCH] From Ralf Habacker, "the appended patch fixes the problem
 reported on
 http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2008-January/006110.html.
 "

> Using QOSGWidget - QWidget + osgViewer creating the graphics context.
>
> Windows Error #2000: [Screen #0] GraphicsWindowWin32::setWindow() - Unable
> to create OpenGL rendering context. Reason: The pixel format is invalid.
>
>
>
> And then the following fate error pops up:
>
>
>
> The instruction at "0x014c7ef1" referenced memory at "0x000000a4", The
> memory could not be "read".
>
> Click on Ok to terminate the program
>
> Click on CANCEL to debug the program
>
>
---
 src/osgViewer/GraphicsWindowWin32.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/osgViewer/GraphicsWindowWin32.cpp b/src/osgViewer/GraphicsWindowWin32.cpp
index fffc08335..61e90852d 100644
--- a/src/osgViewer/GraphicsWindowWin32.cpp
+++ b/src/osgViewer/GraphicsWindowWin32.cpp
@@ -1140,7 +1140,13 @@ bool GraphicsWindowWin32::setWindow( HWND handle )
         //
         // Create the OpenGL rendering context associated with this window
         //
-
+        if (!setPixelFormat())
+        {
+            reportErrorForScreen("GraphicsWindowWin32::setWindow() - Unable to set the inherited window pixel format", _traits->screenNum, ::GetLastError());
+            _hdc  = 0;
+            _hwnd = 0;
+            return false;
+        }
         _hglrc = ::wglCreateContext(_hdc);
         if (_hglrc==0)
         {