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gdkwindow: Don't do some extra work

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We can do an early return in some specific cases before we need to
create and clip a cairo region.
This commit is contained in:
Jasper St. Pierre 2014-06-23 16:12:45 -04:00
parent a9759c7756
commit 70fe57703b
1 changed files with 7 additions and 4 deletions
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11
gdk/gdkwindow.c
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@ -3246,19 +3246,22 @@ _gdk_window_process_updates_recurse_helper (GdkWindow *window,
cairo_region_t *clipped_expose_region;
GList *l, *children;
if (window->destroyed)
return;
if (window->alpha == 0 && !gdk_window_has_impl (window))
return;
clipped_expose_region = cairo_region_copy (expose_region);
cairo_region_translate (clipped_expose_region, dx, dy);
cairo_region_intersect (clipped_expose_region, window->clip_region);
if (cairo_region_is_empty (clipped_expose_region) || window->destroyed)
if (cairo_region_is_empty (clipped_expose_region))
goto out;
if (gdk_window_is_offscreen (window))
gdk_window_add_damage (window, clipped_expose_region);
if (window->alpha == 0 && !gdk_window_has_impl (window))
goto out;
/* Paint the window before the children, clipped to the window region */
/* While gtk+ no longer handles exposes on anything but native