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From dcf0717d7d90ff525c4f87cf633353caabf0eeeb Mon Sep 17 00:00:00 2001
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From: Carlos Garnacho <carlosg@gnome.org>
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Date: Fri, 10 Aug 2018 21:30:58 +0200
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Subject: [PATCH 2/2] clutter: Avoid relayouts when raising/lowering children
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These calls don't actually affect the layout, but the paint order.
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It seems safe to skip the full relayout/repaint of the parent actor,
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and redraw only the area occupied by the affected child.
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---
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clutter/clutter/clutter-actor.c | 20 ++++++++++++++++++--
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1 file changed, 18 insertions(+), 2 deletions(-)
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diff --git a/clutter/clutter/clutter-actor.c b/clutter/clutter/clutter-actor.c
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index 6954f0396..7a9da7257 100644
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--- a/clutter/clutter/clutter-actor.c
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+++ b/clutter/clutter/clutter-actor.c
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@@ -1713,6 +1713,22 @@ set_show_on_set_parent (ClutterActor *self,
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}
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}
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+static void
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+clutter_actor_queue_redraw_on_parent (ClutterActor *self)
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+{
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+ const ClutterPaintVolume *pv;
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+
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+ if (!self->priv->parent)
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+ return;
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+
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+ /* A relayout/redraw is underway */
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+ if (self->priv->needs_allocation)
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+ return;
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+
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+ pv = clutter_actor_get_transformed_paint_volume (self, self->priv->parent);
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+ _clutter_actor_queue_redraw_with_clip (self->priv->parent, 0, pv);
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+}
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+
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/**
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* clutter_actor_show:
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* @self: A #ClutterActor
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@@ -13618,7 +13634,7 @@ clutter_actor_set_child_above_sibling (ClutterActor *self,
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sibling);
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g_object_unref(child);
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- clutter_actor_queue_relayout (self);
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+ clutter_actor_queue_redraw_on_parent (child);
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}
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/**
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@@ -13665,7 +13681,7 @@ clutter_actor_set_child_below_sibling (ClutterActor *self,
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sibling);
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g_object_unref(child);
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- clutter_actor_queue_relayout (self);
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+ clutter_actor_queue_redraw_on_parent (child);
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}
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/**
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--
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2.21.0
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