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surface-actor: Scale unobscured and clip region by geometry scale

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The local copy of the clip- and unobscured region are used to optimize
painting. To get correct results when the actor is scaled, thus "grows",
the corresponding regions have to "shrink", i.e. get scaled down.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/1036
This commit is contained in:
Robert Mader 2020-02-05 00:14:43 +01:00
parent ae1768bf4f
commit d8b7905662
1 changed files with 19 additions and 2 deletions
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21
src/compositor/meta-surface-actor.c
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@ -77,6 +77,21 @@ effective_unobscured_region (MetaSurfaceActor *surface_actor)
return priv->unobscured_region;
}
static cairo_region_t*
get_scaled_region (MetaSurfaceActor *surface_actor,
cairo_region_t *region)
{
MetaWindowActor *window_actor;
int geometry_scale;
window_actor = meta_window_actor_from_actor (CLUTTER_ACTOR (surface_actor));
geometry_scale = meta_window_actor_get_geometry_scale (window_actor);
return meta_region_scale_double (region,
1.0 / geometry_scale,
META_ROUNDING_STRATEGY_GROW);
}
static void
set_unobscured_region (MetaSurfaceActor *surface_actor,
cairo_region_t *unobscured_region)
@ -98,7 +113,9 @@ set_unobscured_region (MetaSurfaceActor *surface_actor,
.height = height,
};
priv->unobscured_region = cairo_region_copy (unobscured_region);
priv->unobscured_region =
get_scaled_region (surface_actor, unobscured_region);
cairo_region_intersect_rectangle (priv->unobscured_region, &bounds);
}
}
@ -112,7 +129,7 @@ set_clip_region (MetaSurfaceActor *surface_actor,
g_clear_pointer (&priv->clip_region, cairo_region_destroy);
if (clip_region)
priv->clip_region = cairo_region_copy (clip_region);
priv->clip_region = get_scaled_region (surface_actor, clip_region);
}
static void