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surface-actor: Do not copy empty clip/unobscured regions

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Clip and unobscured regions stricly shrink during culling. If they
are already empty, simply reference the empty region to reduce allocations.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/1082
This commit is contained in:
Robert Mader 2020-02-25 19:59:22 +01:00 committed by Carlos Garnacho
parent 6831f2edb4
commit c979cd95aa
1 changed files with 25 additions and 13 deletions
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12
src/compositor/meta-surface-actor.c
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@ -102,6 +102,12 @@ set_unobscured_region (MetaSurfaceActor *surface_actor,
g_clear_pointer (&priv->unobscured_region, cairo_region_destroy);
if (unobscured_region)
{
if (cairo_region_is_empty (unobscured_region))
{
priv->unobscured_region = cairo_region_reference (unobscured_region);
}
else
{
cairo_rectangle_int_t bounds = { 0, };
float width, height;
@ -120,6 +126,7 @@ set_unobscured_region (MetaSurfaceActor *surface_actor,
cairo_region_intersect_rectangle (priv->unobscured_region, &bounds);
}
}
}
static void
set_clip_region (MetaSurfaceActor *surface_actor,
@ -130,8 +137,13 @@ set_clip_region (MetaSurfaceActor *surface_actor,
g_clear_pointer (&priv->clip_region, cairo_region_destroy);
if (clip_region)
{
if (cairo_region_is_empty (clip_region))
priv->clip_region = cairo_region_reference (clip_region);
else
priv->clip_region = get_scaled_region (surface_actor, clip_region);
}
}
static void
meta_surface_actor_paint (ClutterActor *actor,