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Clear background on expose with no EXPOSURE_MASK

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Apps that set no exposure mask rely on the system clearing things
to the window background, so we need to do this ourselves.

Also, don't do this on foreign windows, as they are not controlled
by us. In fact don't do exposes on foreign windows either.
This commit is contained in:
Alexander Larsson 2009-02-05 15:38:51 +01:00 committed by Alexander Larsson
parent 16b4c3ade8
commit 7d51b4179d
1 changed files with 30 additions and 14 deletions
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44
gdk/gdkwindow.c
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@ -4443,21 +4443,37 @@ _gdk_window_process_updates_recurse (GdkWindow *window,
gdk_region_destroy (child_region);
}
if (private->event_mask & GDK_EXPOSURE_MASK &&
!gdk_region_empty (expose_region))
if (!gdk_region_empty (expose_region) &&
private->window_type != GDK_WINDOW_FOREIGN)
{
GdkEvent event;
event.expose.type = GDK_EXPOSE;
event.expose.window = g_object_ref (window);
event.expose.send_event = FALSE;
event.expose.count = 0;
event.expose.region = expose_region;
gdk_region_get_clipbox (expose_region, &event.expose.area);
(*_gdk_event_func) (&event, _gdk_event_data);
g_object_unref (window);
if (private->event_mask & GDK_EXPOSURE_MASK)
{
GdkEvent event;
event.expose.type = GDK_EXPOSE;
event.expose.window = g_object_ref (window);
event.expose.send_event = FALSE;
event.expose.count = 0;
event.expose.region = expose_region;
gdk_region_get_clipbox (expose_region, &event.expose.area);
(*_gdk_event_func) (&event, _gdk_event_data);
g_object_unref (window);
}
else
{
/* No exposure mask set, so nothing will be drawn, the
* app relies on the background being what it specified
* for the window. So, we need to clear this manually.
*
* We use begin/end_paint around the clear so that we can
* piggyback on the implicit paint */
gdk_window_begin_paint_region (window, expose_region);
gdk_window_clear_region_internal (window, expose_region, FALSE);
gdk_window_end_paint (window);
}
}
}