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winex11: Don't call ExcludeUpdateRgn for a window with WS_CLIPCHILDREN style.

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Dmitry Timoshkov 2015-06-29 17:54:07 +08:00 committed by Alexandre Julliard
parent 55a78fd19b
commit bd24842eba
1 changed files with 7 additions and 1 deletions
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8
dlls/winex11.drv/window.c
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@ -1335,7 +1335,13 @@ static void move_window_bits( HWND hwnd, Window window, const RECT *old_rect, co
rgn = CreateRectRgnIndirect( &dst_rect );
SelectClipRgn( hdc_dst, rgn );
DeleteObject( rgn );
ExcludeUpdateRgn( hdc_dst, hwnd );
/* WS_CLIPCHILDREN doesn't exclude children from the window update
* region, and ExcludeUpdateRgn call may inappropriately clip valid
* child window contents from the copied parent window bits, but we
* still want to avoid copying invalid window bits when possible.
*/
if (!(GetWindowLongW( hwnd, GWL_STYLE ) & WS_CLIPCHILDREN ))
ExcludeUpdateRgn( hdc_dst, hwnd );
code = X11DRV_START_EXPOSURES;
ExtEscape( hdc_dst, X11DRV_ESCAPE, sizeof(code), (LPSTR)&code, 0, NULL );