Windowed mode AIGLX drawing fix: Ensure WM_PAINT is sent when a window with OpenGL drawing is movedwindowed-mode-aiglx

When a OpenGL child window is moved or resized, force it to be redrawn,
so that any OpenGL content is re-drawn correctly, rather than trying to
copy the bits which we don't have available.

1 files changed, 10 insertions, 0 deletions

diff --git a/hw/xwin/glx/winpriv.c b/hw/xwin/glx/winpriv.c
index 8114a56d1..599291a0b 100644
--- a/hw/xwin/glx/winpriv.c
+++ b/hw/xwin/glx/winpriv.c
@@ -79,6 +79,16 @@ winGlChildWindowProc (HWND hwnd, UINT message,
     case WM_ERASEBKGND:
       return TRUE;
 
+    case WM_WINDOWPOSCHANGING:
+      {
+        /*
+          When window is moved or resized, force it to be redrawn, so that
+          any OpenGL content is re-drawn correctly, rather than copying bits
+        */
+        LPWINDOWPOS pWinPos = (LPWINDOWPOS)lParam;
+        pWinPos->flags |= SWP_NOCOPYBITS;
+      }
+      break;
 
     case WM_PAINT:
       /*