hw/xwin: Add a flag to track which windows have been drawn to using WGL.

Reviewed-by: Colin Harrison <colin.harrison@virgin.net>
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>

1 files changed, 14 insertions, 0 deletions

diff --git a/hw/xwin/winmultiwindowwndproc.c b/hw/xwin/winmultiwindowwndproc.c
index 1a3be78d5..fb1938b3a 100644
--- a/hw/xwin/winmultiwindowwndproc.c
+++ b/hw/xwin/winmultiwindowwndproc.c
@@ -472,6 +472,20 @@ winTopLevelWindowProc (HWND hwnd, UINT message,
 	return 0;
       }
 
+#ifdef XWIN_GLX_WINDOWS
+      if (pWinPriv->fWglUsed)
+        {
+          /*
+             For regions which are being drawn by GL, the shadow framebuffer doesn't have the
+             correct bits, so don't bitblt from the shadow framebuffer
+
+             XXX: For now, just leave it alone, but ideally we want to send an expose event to
+             the window so it really redraws the affected region...
+          */
+          ValidateRect(hwnd, &(ps.rcPaint));
+        }
+      else
+#endif
       /* Try to copy from the shadow buffer */
       if (!BitBlt (hdcUpdate,
 		   ps.rcPaint.left, ps.rcPaint.top,