Fix a race that caused the Microsoft Viewers 'file extraction'

animation to sometimes have a pink background.

Fix a race that caused the Microsoft Viewers 'file extraction'
eb10f347 · Francois Gouget · Alexandre Julliard · fc1e5789 · eb10f347
Commit eb10f347 authored Jan 13, 2004 by Francois Gouget Committed by Alexandre Julliard Jan 13, 2004
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Showing with 9 additions and 4 deletions

animate.c dlls/comctl32/animate.c +9 -4

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--- a/dlls/comctl32/animate.c
+++ b/dlls/comctl32/animate.c
@@ -899,10 +899,15 @@ static LRESULT WINAPI ANIMATE_WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LP
        {
            ANIMATE_INFO* infoPtr = ANIMATE_GetInfoPtr(hWnd);

-            /* the animation isn't playing, don't paint */
-	    if(!infoPtr->uTimer && !infoPtr->hThread)
-		/* default paint handling */
-	    	return DefWindowProcA(hWnd, uMsg, wParam, lParam);
+            /* the animation isn't playing, or has not decompressed
+             * (and displayed) the first frame yet, don't paint
+             */
+            if ((!infoPtr->uTimer && !infoPtr->hThread) ||
+                !infoPtr->hbmPrevFrame)
+            {
+                /* default paint handling */
+                return DefWindowProcA(hWnd, uMsg, wParam, lParam);
+            }

            if (GetWindowLongA(hWnd, GWL_STYLE) & ACS_TRANSPARENT)
                infoPtr->hbrushBG = (HBRUSH)SendMessageA(infoPtr->hwndNotify,