cc: Delete RenderSurface caching.
RenderSurface caching has been disabled for some time and getting in the way of optimizing OcclusionTracker. The proposed optimization cannot distinguish between inside and outside occlusion, which is needed by surface caching.
The proposed optimization for OcclusionTracker is here:
https://codereview.chromium.org/23708021/
BUG=276725
Review URL: https://codereview.chromium.org/23792012
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226146 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/cc/trees/occlusion_tracker_unittest.cc b/cc/trees/occlusion_tracker_unittest.cc
index 469d65a..9d7e9c80 100644
--- a/cc/trees/occlusion_tracker_unittest.cc
+++ b/cc/trees/occlusion_tracker_unittest.cc
@@ -92,42 +92,27 @@
: TestOcclusionTrackerBase<LayerType, RenderSurfaceType>(viewport_rect,
false) {}
- bool OccludedLayer(const LayerType* layer, gfx::Rect content_rect) {
- bool temp;
- return OccludedLayer(layer, content_rect, &temp);
- }
-
bool OccludedLayer(const LayerType* layer,
- gfx::Rect content_rect,
- bool* has_occlusion_from_outside_target_surface) const {
+ gfx::Rect content_rect) const {
return this->Occluded(layer->render_target(),
content_rect,
layer->draw_transform(),
LayerImplDrawTransformIsUnknown(layer),
layer->is_clipped(),
- layer->clip_rect(),
- has_occlusion_from_outside_target_surface);
+ layer->clip_rect());
}
+
// Gives an unoccluded sub-rect of |content_rect| in the content space of the
// layer. Simple wrapper around UnoccludedContentRect.
gfx::Rect UnoccludedLayerContentRect(const LayerType* layer,
gfx::Rect content_rect) const {
- bool temp;
- return UnoccludedLayerContentRect(layer, content_rect, &temp);
- }
-
- gfx::Rect UnoccludedLayerContentRect(
- const LayerType* layer,
- gfx::Rect content_rect,
- bool* has_occlusion_from_outside_target_surface) const {
return this->UnoccludedContentRect(
layer->render_target(),
content_rect,
layer->draw_transform(),
LayerImplDrawTransformIsUnknown(layer),
layer->is_clipped(),
- layer->clip_rect(),
- has_occlusion_from_outside_target_surface);
+ layer->clip_rect());
}
};
@@ -654,40 +639,35 @@
quad_transform,
false,
true,
- clip_rect_in_target,
- NULL).IsEmpty());
+ clip_rect_in_target).IsEmpty());
EXPECT_RECT_EQ(gfx::Rect(0, 0, 10, 10),
occlusion.UnoccludedContentRect(parent,
gfx::Rect(0, 0, 10, 10),
quad_transform,
true,
true,
- clip_rect_in_target,
- NULL));
+ clip_rect_in_target));
EXPECT_RECT_EQ(gfx::Rect(40, 40, 10, 10),
occlusion.UnoccludedContentRect(parent,
gfx::Rect(40, 40, 10, 10),
quad_transform,
false,
true,
- clip_rect_in_target,
- NULL));
+ clip_rect_in_target));
EXPECT_RECT_EQ(gfx::Rect(40, 30, 5, 10),
occlusion.UnoccludedContentRect(parent,
gfx::Rect(35, 30, 10, 10),
quad_transform,
false,
true,
- clip_rect_in_target,
- NULL));
+ clip_rect_in_target));
EXPECT_RECT_EQ(gfx::Rect(40, 40, 5, 5),
occlusion.UnoccludedContentRect(parent,
gfx::Rect(40, 40, 10, 10),
quad_transform,
false,
true,
- gfx::Rect(0, 0, 75, 75),
- NULL));
+ gfx::Rect(0, 0, 75, 75)));
}
};
@@ -1418,7 +1398,7 @@
// There is nothing above child2's surface in the z-order.
EXPECT_RECT_EQ(gfx::Rect(-10, 420, 70, 80),
occlusion.UnoccludedContributingSurfaceContentRect(
- child2, false, gfx::Rect(-10, 420, 70, 80), NULL));
+ child2, false, gfx::Rect(-10, 420, 70, 80)));
this->LeaveContributingSurface(child2, &occlusion);
this->VisitLayer(layer1, &occlusion);
@@ -1432,7 +1412,7 @@
// child2's contents will occlude child1 below it.
EXPECT_RECT_EQ(gfx::Rect(-10, 430, 10, 70),
occlusion.UnoccludedContributingSurfaceContentRect(
- child1, false, gfx::Rect(-10, 430, 80, 70), NULL));
+ child1, false, gfx::Rect(-10, 430, 80, 70)));
this->LeaveContributingSurface(child1, &occlusion);
this->EnterLayer(parent, &occlusion, false);
@@ -1542,7 +1522,7 @@
// There is nothing above child2's surface in the z-order.
EXPECT_RECT_EQ(gfx::Rect(-10, 420, 70, 80),
occlusion.UnoccludedContributingSurfaceContentRect(
- child2, false, gfx::Rect(-10, 420, 70, 80), NULL));
+ child2, false, gfx::Rect(-10, 420, 70, 80)));
this->LeaveContributingSurface(child2, &occlusion);
this->VisitLayer(layer1, &occlusion);
@@ -1556,13 +1536,13 @@
// child2's contents will occlude child1 below it.
EXPECT_RECT_EQ(gfx::Rect(420, -20, 80, 90),
occlusion.UnoccludedContributingSurfaceContentRect(
- child1, false, gfx::Rect(420, -20, 80, 90), NULL));
+ child1, false, gfx::Rect(420, -20, 80, 90)));
EXPECT_RECT_EQ(gfx::Rect(490, -10, 10, 80),
occlusion.UnoccludedContributingSurfaceContentRect(
- child1, false, gfx::Rect(420, -10, 80, 90), NULL));
+ child1, false, gfx::Rect(420, -10, 80, 90)));
EXPECT_RECT_EQ(gfx::Rect(420, -20, 70, 10),
occlusion.UnoccludedContributingSurfaceContentRect(
- child1, false, gfx::Rect(420, -20, 70, 90), NULL));
+ child1, false, gfx::Rect(420, -20, 70, 90)));
this->LeaveContributingSurface(child1, &occlusion);
this->EnterLayer(parent, &occlusion, false);
@@ -2735,7 +2715,7 @@
occlusion.occlusion_from_outside_target().ToString());
EXPECT_RECT_EQ(gfx::Rect(0, 0, 250, 300),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface, false, gfx::Rect(0, 0, 300, 300), NULL));
+ surface, false, gfx::Rect(0, 0, 300, 300)));
this->LeaveContributingSurface(surface, &occlusion);
// Occlusion from outside the animating surface still exists.
@@ -2856,7 +2836,7 @@
occlusion.occlusion_from_outside_target().ToString());
EXPECT_RECT_EQ(gfx::Rect(0, 0, 250, 300),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface, false, gfx::Rect(0, 0, 300, 300), NULL));
+ surface, false, gfx::Rect(0, 0, 300, 300)));
this->LeaveContributingSurface(surface, &occlusion);
// Occlusion from outside the animating surface still exists.
@@ -3007,7 +2987,7 @@
// The contributing |surface| is animating so it can't be occluded.
EXPECT_RECT_EQ(gfx::Rect(0, 0, 300, 300),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface, false, gfx::Rect(0, 0, 300, 300), NULL));
+ surface, false, gfx::Rect(0, 0, 300, 300)));
this->LeaveContributingSurface(surface, &occlusion);
this->EnterLayer(layer, &occlusion, false);
@@ -3172,7 +3152,7 @@
// Surface is not occluded so it shouldn't think it is.
EXPECT_RECT_EQ(gfx::Rect(0, 0, 100, 100),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface, false, gfx::Rect(0, 0, 100, 100), NULL));
+ surface, false, gfx::Rect(0, 0, 100, 100)));
}
};
@@ -3229,10 +3209,10 @@
// Surface is occluded, but only the top 10px of the replica.
EXPECT_RECT_EQ(gfx::Rect(0, 0, 0, 0),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface, false, gfx::Rect(0, 0, 100, 100), NULL));
+ surface, false, gfx::Rect(0, 0, 100, 100)));
EXPECT_RECT_EQ(gfx::Rect(0, 10, 100, 90),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface, true, gfx::Rect(0, 0, 100, 100), NULL));
+ surface, true, gfx::Rect(0, 0, 100, 100)));
}
};
@@ -3296,10 +3276,10 @@
// Surface and replica are occluded different amounts.
EXPECT_RECT_EQ(gfx::Rect(40, 0, 60, 100),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface, false, gfx::Rect(0, 0, 100, 100), NULL));
+ surface, false, gfx::Rect(0, 0, 100, 100)));
EXPECT_RECT_EQ(gfx::Rect(50, 0, 50, 100),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface, true, gfx::Rect(0, 0, 100, 100), NULL));
+ surface, true, gfx::Rect(0, 0, 100, 100)));
}
};
@@ -3368,7 +3348,7 @@
// inappropriately.
EXPECT_RECT_EQ(gfx::Rect(0, 40, 100, 10),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface_child, false, gfx::Rect(0, 0, 100, 50), NULL));
+ surface_child, false, gfx::Rect(0, 0, 100, 50)));
this->LeaveContributingSurface(surface_child, &occlusion);
// When the surface_child's occlusion is transformed up to its parent, make
@@ -3384,7 +3364,7 @@
// The surface's parent does have a clip rect as it is the root layer.
EXPECT_RECT_EQ(gfx::Rect(0, 50, 100, 50),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface, false, gfx::Rect(0, 0, 100, 100), NULL));
+ surface, false, gfx::Rect(0, 0, 100, 100)));
}
};
@@ -3425,7 +3405,7 @@
// child surface.
EXPECT_RECT_EQ(gfx::Rect(0, 0, 100, 200),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface, false, gfx::Rect(0, 0, 100, 300), NULL));
+ surface, false, gfx::Rect(0, 0, 100, 300)));
}
this->ResetLayerIterator();
{
@@ -3443,7 +3423,7 @@
// surface.
EXPECT_RECT_EQ(gfx::Rect(0, 0, 100, 100),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface, false, gfx::Rect(0, 0, 100, 300), NULL));
+ surface, false, gfx::Rect(0, 0, 100, 300)));
}
}
};
@@ -3514,7 +3494,7 @@
EXPECT_EQ(
gfx::Rect(0, 50, 80, 50).ToString(),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface_child, false, gfx::Rect(0, 0, 100, 100), NULL).ToString());
+ surface_child, false, gfx::Rect(0, 0, 100, 100)).ToString());
this->LeaveContributingSurface(surface_child, &occlusion);
this->VisitLayer(surface, &occlusion);
@@ -3522,7 +3502,7 @@
// The surface's parent does have a clip rect as it is the root layer.
EXPECT_EQ(gfx::Rect(0, 50, 80, 50).ToString(),
occlusion.UnoccludedContributingSurfaceContentRect(
- surface, false, gfx::Rect(0, 0, 100, 100), NULL).ToString());
+ surface, false, gfx::Rect(0, 0, 100, 100)).ToString());
}
};
@@ -4381,191 +4361,6 @@
ALL_OCCLUSIONTRACKER_TEST(OcclusionTrackerTestMinimumTrackingSize);
template <class Types>
-class OcclusionTrackerTestViewportClipIsExternalOcclusion
- : public OcclusionTrackerTest<Types> {
- protected:
- explicit OcclusionTrackerTestViewportClipIsExternalOcclusion(
- bool opaque_layers)
- : OcclusionTrackerTest<Types>(opaque_layers) {}
- void RunMyTest() {
- typename Types::ContentLayerType* parent = this->CreateRoot(
- this->identity_matrix, gfx::PointF(), gfx::Size(400, 400));
- typename Types::LayerType* small =
- this->CreateDrawingSurface(parent,
- this->identity_matrix,
- gfx::PointF(),
- gfx::Size(200, 200),
- false);
- typename Types::LayerType* large =
- this->CreateDrawingLayer(small,
- this->identity_matrix,
- gfx::PointF(),
- gfx::Size(400, 400),
- false);
- small->SetMasksToBounds(true);
- this->CalcDrawEtc(parent);
-
- TestOcclusionTrackerWithClip<typename Types::LayerType,
- typename Types::RenderSurfaceType> occlusion(
- gfx::Rect(0, 0, 100, 100));
-
- this->EnterLayer(large, &occlusion, false);
-
- bool has_occlusion_from_outside_target_surface = false;
- EXPECT_RECT_EQ(gfx::Rect(0, 0, 100, 100),
- occlusion.UnoccludedLayerContentRect(
- large,
- gfx::Rect(0, 0, 400, 400),
- &has_occlusion_from_outside_target_surface));
- EXPECT_TRUE(has_occlusion_from_outside_target_surface);
-
- has_occlusion_from_outside_target_surface = false;
- EXPECT_FALSE(
- occlusion.OccludedLayer(large,
- gfx::Rect(0, 0, 400, 400),
- &has_occlusion_from_outside_target_surface));
- EXPECT_TRUE(has_occlusion_from_outside_target_surface);
-
- this->LeaveLayer(large, &occlusion);
- this->VisitLayer(small, &occlusion);
-
- has_occlusion_from_outside_target_surface = false;
- EXPECT_RECT_EQ(gfx::Rect(0, 0, 100, 100),
- occlusion.UnoccludedLayerContentRect(
- small,
- gfx::Rect(0, 0, 200, 200),
- &has_occlusion_from_outside_target_surface));
- EXPECT_TRUE(has_occlusion_from_outside_target_surface);
-
- has_occlusion_from_outside_target_surface = false;
- EXPECT_FALSE(
- occlusion.OccludedLayer(small,
- gfx::Rect(0, 0, 200, 200),
- &has_occlusion_from_outside_target_surface));
- EXPECT_TRUE(has_occlusion_from_outside_target_surface);
-
- this->EnterContributingSurface(small, &occlusion, false);
-
- has_occlusion_from_outside_target_surface = false;
- EXPECT_RECT_EQ(gfx::Rect(0, 0, 100, 100),
- occlusion.UnoccludedContributingSurfaceContentRect(
- small,
- false,
- gfx::Rect(0, 0, 200, 200),
- &has_occlusion_from_outside_target_surface));
- EXPECT_TRUE(has_occlusion_from_outside_target_surface);
- }
-};
-
-ALL_OCCLUSIONTRACKER_TEST(
- OcclusionTrackerTestViewportClipIsExternalOcclusion)
-
-template <class Types>
-class OcclusionTrackerTestLayerClipIsExternalOcclusion
- : public OcclusionTrackerTest<Types> {
- protected:
- explicit OcclusionTrackerTestLayerClipIsExternalOcclusion(bool opaque_layers)
- : OcclusionTrackerTest<Types>(opaque_layers) {}
- void RunMyTest() {
- typename Types::ContentLayerType* parent = this->CreateRoot(
- this->identity_matrix, gfx::PointF(), gfx::Size(400, 400));
- typename Types::LayerType* smallest = this->CreateDrawingLayer(
- parent, this->identity_matrix, gfx::PointF(), gfx::Size(50, 50), false);
- typename Types::LayerType* smaller =
- this->CreateDrawingSurface(smallest,
- this->identity_matrix,
- gfx::PointF(),
- gfx::Size(100, 100),
- false);
- typename Types::LayerType* small =
- this->CreateDrawingSurface(smaller,
- this->identity_matrix,
- gfx::PointF(),
- gfx::Size(200, 200),
- false);
- typename Types::LayerType* large =
- this->CreateDrawingLayer(small,
- this->identity_matrix,
- gfx::PointF(),
- gfx::Size(400, 400),
- false);
- smallest->SetMasksToBounds(true);
- smaller->SetMasksToBounds(true);
- small->SetMasksToBounds(true);
- this->CalcDrawEtc(parent);
-
- TestOcclusionTrackerWithClip<typename Types::LayerType,
- typename Types::RenderSurfaceType> occlusion(
- gfx::Rect(0, 0, 1000, 1000));
-
- this->EnterLayer(large, &occlusion, false);
-
- // Clipping from the smaller layer is from outside the target surface.
- bool has_occlusion_from_outside_target_surface = false;
- EXPECT_RECT_EQ(gfx::Rect(0, 0, 100, 100),
- occlusion.UnoccludedLayerContentRect(
- large,
- gfx::Rect(0, 0, 400, 400),
- &has_occlusion_from_outside_target_surface));
- EXPECT_TRUE(has_occlusion_from_outside_target_surface);
-
- has_occlusion_from_outside_target_surface = false;
- EXPECT_FALSE(
- occlusion.OccludedLayer(large,
- gfx::Rect(0, 0, 400, 400),
- &has_occlusion_from_outside_target_surface));
- EXPECT_TRUE(has_occlusion_from_outside_target_surface);
-
- this->LeaveLayer(large, &occlusion);
- this->VisitLayer(small, &occlusion);
-
- // Clipping from the smaller layer is from outside the target surface.
- has_occlusion_from_outside_target_surface = false;
- EXPECT_RECT_EQ(gfx::Rect(0, 0, 100, 100),
- occlusion.UnoccludedLayerContentRect(
- small,
- gfx::Rect(0, 0, 200, 200),
- &has_occlusion_from_outside_target_surface));
- EXPECT_TRUE(has_occlusion_from_outside_target_surface);
-
- has_occlusion_from_outside_target_surface = false;
- EXPECT_FALSE(
- occlusion.OccludedLayer(small,
- gfx::Rect(0, 0, 200, 200),
- &has_occlusion_from_outside_target_surface));
- EXPECT_TRUE(has_occlusion_from_outside_target_surface);
-
- this->EnterContributingSurface(small, &occlusion, false);
-
- // The |small| surface is clipped from outside its target by |smallest|.
- has_occlusion_from_outside_target_surface = false;
- EXPECT_RECT_EQ(gfx::Rect(0, 0, 50, 50),
- occlusion.UnoccludedContributingSurfaceContentRect(
- small,
- false,
- gfx::Rect(0, 0, 200, 200),
- &has_occlusion_from_outside_target_surface));
- EXPECT_TRUE(has_occlusion_from_outside_target_surface);
-
- this->LeaveContributingSurface(small, &occlusion);
- this->VisitLayer(smaller, &occlusion);
- this->EnterContributingSurface(smaller, &occlusion, false);
-
- // The |smaller| surface is clipped from inside its target by |smallest|.
- has_occlusion_from_outside_target_surface = false;
- EXPECT_RECT_EQ(gfx::Rect(0, 0, 50, 50),
- occlusion.UnoccludedContributingSurfaceContentRect(
- smaller,
- false,
- gfx::Rect(0, 0, 100, 100),
- &has_occlusion_from_outside_target_surface));
- EXPECT_FALSE(has_occlusion_from_outside_target_surface);
- }
-};
-
-ALL_OCCLUSIONTRACKER_TEST(OcclusionTrackerTestLayerClipIsExternalOcclusion)
-
-template <class Types>
class OcclusionTrackerTestPreventOcclusionOnLayer
: public OcclusionTrackerTest<Types> {
protected:
@@ -4585,39 +4380,30 @@
TestOcclusionTrackerWithClip<typename Types::LayerType,
typename Types::RenderSurfaceType> occlusion(
gfx::Rect(0, 0, 1000, 1000));
- bool external_occlusion = false;
this->VisitLayer(occluding, &occlusion);
this->EnterLayer(prevented, &occlusion, true);
// This layer is not occluded because it is prevented.
EXPECT_FALSE(occlusion.OccludedLayer(prevented,
- gfx::Rect(50, 50),
- &external_occlusion));
- EXPECT_FALSE(external_occlusion);
+ gfx::Rect(50, 50)));
EXPECT_EQ(gfx::Rect(50, 50).ToString(),
occlusion.UnoccludedLayerContentRect(
prevented,
- gfx::Rect(50, 50),
- &external_occlusion).ToString());
- EXPECT_FALSE(external_occlusion);
+ gfx::Rect(50, 50)).ToString());
this->LeaveLayer(prevented, &occlusion);
this->EnterLayer(unprevented, &occlusion, false);
// This layer is fully occluded.
EXPECT_TRUE(occlusion.OccludedLayer(unprevented,
- gfx::Rect(50, 50),
- &external_occlusion));
- EXPECT_FALSE(external_occlusion);
+ gfx::Rect(50, 50)));
EXPECT_EQ(gfx::Rect().ToString(),
occlusion.UnoccludedLayerContentRect(
unprevented,
- gfx::Rect(50, 50),
- &external_occlusion).ToString());
- EXPECT_FALSE(external_occlusion);
+ gfx::Rect(50, 50)).ToString());
this->LeaveLayer(unprevented, &occlusion);
}
@@ -4646,7 +4432,6 @@
TestOcclusionTrackerWithClip<typename Types::LayerType,
typename Types::RenderSurfaceType> occlusion(
gfx::Rect(0, 0, 1000, 1000));
- bool external_occlusion = false;
this->VisitLayer(occluding, &occlusion);
this->EnterLayer(prevented, &occlusion, true);
@@ -4655,9 +4440,7 @@
EXPECT_EQ(gfx::Rect(50, 50).ToString(),
occlusion.UnoccludedLayerContentRect(
prevented,
- gfx::Rect(50, 50),
- &external_occlusion).ToString());
- EXPECT_FALSE(external_occlusion);
+ gfx::Rect(50, 50)).ToString());
this->LeaveLayer(prevented, &occlusion);
this->EnterContributingSurface(prevented, &occlusion, true);
@@ -4667,9 +4450,7 @@
occlusion.UnoccludedContributingSurfaceContentRect(
prevented,
false, // is_replica
- gfx::Rect(50, 50),
- &external_occlusion).ToString());
- EXPECT_FALSE(external_occlusion);
+ gfx::Rect(50, 50)).ToString());
this->LeaveContributingSurface(prevented, &occlusion);
this->EnterLayer(unprevented, &occlusion, false);
@@ -4678,9 +4459,7 @@
EXPECT_EQ(gfx::Rect().ToString(),
occlusion.UnoccludedLayerContentRect(
unprevented,
- gfx::Rect(50, 50),
- &external_occlusion).ToString());
- EXPECT_TRUE(external_occlusion);
+ gfx::Rect(50, 50)).ToString());
this->LeaveLayer(unprevented, &occlusion);
this->EnterContributingSurface(unprevented, &occlusion, false);
@@ -4690,9 +4469,7 @@
occlusion.UnoccludedContributingSurfaceContentRect(
unprevented,
false, // is_replica
- gfx::Rect(50, 50),
- &external_occlusion).ToString());
- EXPECT_FALSE(external_occlusion);
+ gfx::Rect(50, 50)).ToString());
this->LeaveContributingSurface(unprevented, &occlusion);
}
@@ -4719,22 +4496,17 @@
TestOcclusionTrackerWithClip<typename Types::LayerType,
typename Types::RenderSurfaceType> occlusion(
gfx::Rect(0, 0, 10, 10));
- bool external_occlusion = false;
this->EnterLayer(prevented, &occlusion, true);
// This layer is not occluded because it is prevented.
EXPECT_FALSE(occlusion.OccludedLayer(prevented,
- gfx::Rect(50, 50),
- &external_occlusion));
- EXPECT_FALSE(external_occlusion);
+ gfx::Rect(50, 50)));
EXPECT_EQ(gfx::Rect(50, 50).ToString(),
occlusion.UnoccludedLayerContentRect(
prevented,
- gfx::Rect(50, 50),
- &external_occlusion).ToString());
- EXPECT_FALSE(external_occlusion);
+ gfx::Rect(50, 50)).ToString());
this->LeaveLayer(prevented, &occlusion);
this->EnterLayer(unprevented, &occlusion, false);
@@ -4743,9 +4515,7 @@
EXPECT_EQ(gfx::Rect(10, 10).ToString(),
occlusion.UnoccludedLayerContentRect(
unprevented,
- gfx::Rect(50, 50),
- &external_occlusion).ToString());
- EXPECT_TRUE(external_occlusion);
+ gfx::Rect(50, 50)).ToString());
this->LeaveLayer(unprevented, &occlusion);
}
