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surface-actor: Fix meta_surface_actor_is_obscured_on_stage_view

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`meta_surface_actor_is_obscured_on_stage_view` currently fails to
account for non-identity scaling of actor size (e.g. window actor
geometry scale or surface pixel alignment).

Fix this by using the new `meta_region_apply_matrix_transform_expand` to
calculate the unobscured region in stage coordinates.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2726>
This commit is contained in:
msizanoen1 2023-04-19 18:43:50 +07:00 committed by Marge Bot
parent 231729b7f2
commit ae4755cc61
1 changed files with 12 additions and 5 deletions
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17
src/compositor/meta-surface-actor.c
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@ -395,9 +395,11 @@ meta_surface_actor_is_obscured_on_stage_view (MetaSurfaceActor *self,
{
MetaSurfaceActorPrivate *priv =
meta_surface_actor_get_instance_private (self);
ClutterActor *stage = clutter_actor_get_stage (CLUTTER_ACTOR (self));
cairo_region_t *intersection_region;
cairo_rectangle_int_t stage_rect;
float x, y;
graphene_matrix_t transform;
graphene_rect_t actor_bounds;
float bounds_width, bounds_height;
float bounds_size;
int intersection_size = 0;
@ -406,9 +408,11 @@ meta_surface_actor_is_obscured_on_stage_view (MetaSurfaceActor *self,
if (cairo_region_is_empty (unobscured_region))
return TRUE;
intersection_region = cairo_region_copy (unobscured_region);
clutter_actor_get_transformed_position (CLUTTER_ACTOR (self), &x, &y);
cairo_region_translate (intersection_region, x, y);
clutter_actor_get_relative_transformation_matrix (CLUTTER_ACTOR (self),
stage,
&transform);
intersection_region = meta_region_apply_matrix_transform_expand (unobscured_region, &transform);
clutter_stage_view_get_layout (stage_view, &stage_rect);
cairo_region_intersect_rectangle (intersection_region,
@ -428,7 +432,10 @@ meta_surface_actor_is_obscured_on_stage_view (MetaSurfaceActor *self,
clutter_content_get_preferred_size (CLUTTER_CONTENT (priv->texture),
&bounds_width,
&bounds_height);
bounds_size = bounds_width * bounds_height;
graphene_rect_init (&actor_bounds, 0, 0, bounds_width, bounds_height);
graphene_matrix_transform_bounds (&transform, &actor_bounds, &actor_bounds);
graphene_rect_round_extents (&actor_bounds, &actor_bounds);
bounds_size = graphene_rect_get_area (&actor_bounds);
n_rects = cairo_region_num_rectangles (intersection_region);
for (i = 0; i < n_rects; i++)