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winex11: Fix exposing partially off-screen windows. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2018-06-14 13:19:50 +02:00
parent 2fb792bd7c
commit 3a72836136
1 changed files with 3 additions and 1 deletions
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4
dlls/winex11.drv/bitblt.c
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@ -2092,11 +2092,13 @@ HRGN expose_surface( struct window_surface *window_surface, const RECT *rect )
{
struct x11drv_window_surface *surface = get_x11_surface( window_surface );
HRGN region = 0;
RECT rc = *rect;
if (window_surface->funcs != &x11drv_surface_funcs) return 0; /* we may get the null surface */
window_surface->funcs->lock( window_surface );
add_bounds_rect( &surface->bounds, rect );
OffsetRect( &rc, -window_surface->rect.left, -window_surface->rect.top );
add_bounds_rect( &surface->bounds, &rc );
if (surface->region)
{
region = CreateRectRgnIndirect( rect );