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server: Crop the invalidate region against the rectangles of all parents.

This commit is contained in:
Alexandre Julliard 2008-05-12 12:29:56 +02:00
parent bc25119c6e
commit 30c0639b5a
2 changed files with 23 additions and 13 deletions
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6
dlls/user32/tests/msg.c
View File

@ -5824,6 +5824,12 @@ static void test_paint_messages(void)
SetRectRgn( hrgn, 30, 30, 40, 40 );
check_update_rgn( hchild, hrgn );
/* invalidated region is cropped by the parent rects */
SetRect( &rect, 0, 0, 50, 50 );
RedrawWindow( hchild, &rect, 0, RDW_INVALIDATE | RDW_ERASE );
SetRectRgn( hrgn, 30, 30, 50, 50 );
check_update_rgn( hchild, hrgn );
DestroyWindow( hparent );
ok(!IsWindow(hchild), "child must be destroyed with its parent\n");
flush_sequence();

22
server/window.c
View File

@ -1036,23 +1036,27 @@ static int get_window_visible_rect( struct window *win, rectangle_t *rect, int f
/* and converted from client to window coordinates. Helper for (in)validate_window. */
static struct region *crop_region_to_win_rect( struct window *win, struct region *region, int frame )
{
struct region *tmp = create_empty_region();
rectangle_t rect;
struct region *tmp;
if (!tmp) return NULL;
if (!get_window_visible_rect( win, &rect, frame )) return NULL;
if (!(tmp = create_empty_region())) return NULL;
set_region_rect( tmp, &rect );
/* get bounding rect in client coords */
if (frame) set_region_rect( tmp, &win->window_rect );
else set_region_client_rect( tmp, win );
if (!is_desktop_window(win))
offset_region( tmp, -win->client_rect.left, -win->client_rect.top );
if (region)
{
/* map it to client coords */
offset_region( tmp, win->window_rect.left - win->client_rect.left,
win->window_rect.top - win->client_rect.top );
/* intersect specified region with bounding rect */
if (region && !intersect_region( tmp, region, tmp )) goto done;
if (!intersect_region( tmp, region, tmp )) goto done;
if (is_region_empty( tmp )) goto done;
/* map it to window coords */
/* map it back to window coords */
offset_region( tmp, win->client_rect.left - win->window_rect.left,
win->client_rect.top - win->window_rect.top );
}
return tmp;
done: