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gdkwindow: Fizzle out early if we don't have to do anything

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This commit is contained in:
Jasper St. Pierre
2014-06-23 16:30:58 -04:00
parent 739dacf12a
commit d29922ad73
1 changed files with 17 additions and 7 deletions
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24
gdk/gdkwindow.c
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@@ -3236,6 +3236,7 @@ _gdk_window_process_updates_recurse_helper (GdkWindow *window,
GdkWindow *child;
cairo_region_t *clipped_expose_region;
GList *l, *children;
gboolean send_expose_event;
if (window->destroyed)
return;
@@ -3243,6 +3244,21 @@ _gdk_window_process_updates_recurse_helper (GdkWindow *window,
if (window->alpha == 0 && !gdk_window_has_impl (window))
return;
/* While gtk+ no longer handles exposes on anything but native
window we still have to send them to all windows that have the
event mask set for backwards compat. We also need to send
it to all native windows, even if they don't specify the
expose mask, because they may have non-native children that do. */
send_expose_event = (gdk_window_has_impl (window) ||
window->event_mask & GDK_EXPOSURE_MASK);
/* If we have no children, we aren't an offscreen window, and we aren't going
* to send an expose event, so fizzle out now. */
if (window->children == NULL &&
!gdk_window_is_offscreen (window) &&
!send_expose_event)
return;
clipped_expose_region = cairo_region_copy (expose_region);
if (!gdk_window_has_impl (window))
@@ -3258,13 +3274,7 @@ _gdk_window_process_updates_recurse_helper (GdkWindow *window,
/* Paint the window before the children, clipped to the window region */
/* While gtk+ no longer handles exposes on anything but native
window we still have to send them to all windows that have the
event mask set for backwards compat. We also need to send
it to all native windows, even if they don't specify the
expose mask, because they may have non-native children that do. */
if (gdk_window_has_impl (window) ||
window->event_mask & GDK_EXPOSURE_MASK)
if (send_expose_event)
{
GdkEvent event;