cc: Compute animation scale on demand

cc/trees/layer_tree_host_common_unittest.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/layer_tree_host_common.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 7359 matching lines @@
 
   SetLayerPropertiesForTesting(grand_child_raw, identity_matrix, gfx::Point3F(),
                                gfx::PointF(), gfx::Size(1, 2), true, false,
                                false);
 
   host_impl.active_tree()->SetRootLayerForTesting(std::move(grand_parent));
 
   ExecuteCalculateDrawProperties(grand_parent_raw);
 
   // No layers have animations.
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f, child_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(
-      0.f, grand_child_raw->draw_properties().maximum_animation_contents_scale);
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_child_raw));
 
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            child_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(
-      0.f,
-      grand_child_raw->draw_properties().starting_animation_contents_scale);
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_child_raw));
 
   TransformOperations translation;
   translation.AppendTranslate(1.f, 2.f, 3.f);
 
   scoped_refptr<AnimationTimeline> timeline;
   timeline = AnimationTimeline::Create(AnimationIdProvider::NextTimelineId());
   host_impl.animation_host()->AddAnimationTimeline(timeline);
 
   host_impl.active_tree()->SetElementIdsForTesting();
   AddAnimatedTransformToElementWithPlayer(parent_raw->element_id(), timeline,
                                           1.0, TransformOperations(),
                                           translation);
 
   // No layers have scale-affecting animations.
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f, child_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(
-      0.f, grand_child_raw->draw_properties().maximum_animation_contents_scale);
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_child_raw));
 
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            child_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(
-      0.f,
-      grand_child_raw->draw_properties().starting_animation_contents_scale);
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_child_raw));
 
   TransformOperations scale;
   scale.AppendScale(5.f, 4.f, 3.f);
 
   AddAnimatedTransformToElementWithPlayer(child_raw->element_id(), timeline,
                                           1.0, TransformOperations(), scale);
   child_raw->layer_tree_impl()->property_trees()->needs_rebuild = true;
   ExecuteCalculateDrawProperties(grand_parent_raw);
 
   // Only |child| has a scale-affecting animation.
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(5.f, child_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(
-      5.f, grand_child_raw->draw_properties().maximum_animation_contents_scale);
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(parent_raw));
+  EXPECT_EQ(5.f, GetMaximumAnimationScale(child_raw));
+  EXPECT_EQ(5.f, GetMaximumAnimationScale(grand_child_raw));
 
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(1.f,
-            child_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(
-      1.f,
-      grand_child_raw->draw_properties().starting_animation_contents_scale);
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(parent_raw));
+  EXPECT_EQ(1.f, GetStartingAnimationScale(child_raw));
+  EXPECT_EQ(1.f, GetStartingAnimationScale(grand_child_raw));
 
   AddAnimatedTransformToElementWithPlayer(grand_parent_raw->element_id(),
                                           timeline, 1.0, TransformOperations(),
                                           scale);
   grand_parent_raw->layer_tree_impl()->property_trees()->needs_rebuild = true;
   ExecuteCalculateDrawProperties(grand_parent_raw);
 
   // |grand_parent| and |child| have scale-affecting animations.
-  EXPECT_EQ(
-      5.f,
-      grand_parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(5.f,
-            parent_raw->draw_properties().maximum_animation_contents_scale);
+  EXPECT_EQ(5.f, GetMaximumAnimationScale(grand_parent_raw));
+  EXPECT_EQ(5.f, GetMaximumAnimationScale(parent_raw));
   // We don't support combining animated scales from two nodes; 0.f means
   // that the maximum scale could not be computed.
-  EXPECT_EQ(0.f, child_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(
-      0.f, grand_child_raw->draw_properties().maximum_animation_contents_scale);
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_child_raw));
 
-  EXPECT_EQ(
-      1.f,
-      grand_parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(1.f,
-            parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            child_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(
-      0.f,
-      grand_child_raw->draw_properties().starting_animation_contents_scale);
+  EXPECT_EQ(1.f, GetStartingAnimationScale(grand_parent_raw));
+  EXPECT_EQ(1.f, GetStartingAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_child_raw));
 
   AddAnimatedTransformToElementWithPlayer(parent_raw->element_id(), timeline,
                                           1.0, TransformOperations(), scale);
   parent_raw->layer_tree_impl()->property_trees()->needs_rebuild = true;
   ExecuteCalculateDrawProperties(grand_parent_raw);
 
   // |grand_parent|, |parent|, and |child| have scale-affecting animations.
-  EXPECT_EQ(
-      5.f,
-      grand_parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f, child_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(
-      0.f, grand_child_raw->draw_properties().maximum_animation_contents_scale);
+  EXPECT_EQ(5.f, GetMaximumAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_child_raw));
 
-  EXPECT_EQ(
-      1.f,
-      grand_parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            child_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(
-      0.f,
-      grand_child_raw->draw_properties().starting_animation_contents_scale);
+  EXPECT_EQ(1.f, GetStartingAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_child_raw));
 
   AbortAnimationsOnElementWithPlayer(grand_parent_raw->element_id(), timeline,
                                      TargetProperty::TRANSFORM);
   AbortAnimationsOnElementWithPlayer(parent_raw->element_id(), timeline,
                                      TargetProperty::TRANSFORM);
   AbortAnimationsOnElementWithPlayer(child_raw->element_id(), timeline,
                                      TargetProperty::TRANSFORM);
 
   TransformOperations perspective;
   perspective.AppendPerspective(10.f);
 
   AddAnimatedTransformToElementWithPlayer(child_raw->element_id(), timeline,
                                           1.0, TransformOperations(),
                                           perspective);
   child_raw->layer_tree_impl()->property_trees()->needs_rebuild = true;
   ExecuteCalculateDrawProperties(grand_parent_raw);
 
   // |child| has a scale-affecting animation but computing the maximum of this
   // animation is not supported.
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f, child_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(
-      0.f, grand_child_raw->draw_properties().maximum_animation_contents_scale);
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_child_raw));
 
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            child_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(
-      0.f,
-      grand_child_raw->draw_properties().starting_animation_contents_scale);
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_child_raw));
 
   AbortAnimationsOnElementWithPlayer(child_raw->element_id(), timeline,
                                      TargetProperty::TRANSFORM);
   gfx::Transform scale_matrix;
   scale_matrix.Scale(1.f, 2.f);
   grand_parent_raw->SetTransform(scale_matrix);
   parent_raw->SetTransform(scale_matrix);
   grand_parent_raw->layer_tree_impl()->property_trees()->needs_rebuild = true;
 
   AddAnimatedTransformToElementWithPlayer(parent_raw->element_id(), timeline,
                                           1.0, TransformOperations(), scale);
   ExecuteCalculateDrawProperties(grand_parent_raw);
 
   // |grand_parent| and |parent| each have scale 2.f. |parent| has a  scale
   // animation with maximum scale 5.f.
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(10.f,
-            parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(10.f,
-            child_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(
-      10.f,
-      grand_child_raw->draw_properties().maximum_animation_contents_scale);
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_parent_raw));
+  EXPECT_EQ(10.f, GetMaximumAnimationScale(parent_raw));
+  EXPECT_EQ(10.f, GetMaximumAnimationScale(child_raw));
+  EXPECT_EQ(10.f, GetMaximumAnimationScale(grand_child_raw));
 
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(2.f,
-            parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(2.f,
-            child_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(
-      2.f,
-      grand_child_raw->draw_properties().starting_animation_contents_scale);
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_parent_raw));
+  EXPECT_EQ(2.f, GetStartingAnimationScale(parent_raw));
+  EXPECT_EQ(2.f, GetStartingAnimationScale(child_raw));
+  EXPECT_EQ(2.f, GetStartingAnimationScale(grand_child_raw));
 
   gfx::Transform perspective_matrix;
   perspective_matrix.ApplyPerspectiveDepth(2.f);
   child_raw->SetTransform(perspective_matrix);
   grand_parent_raw->layer_tree_impl()->property_trees()->needs_rebuild = true;
   ExecuteCalculateDrawProperties(grand_parent_raw);
 
   // |child| has a transform that's neither a translation nor a scale.
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(10.f,
-            parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f, child_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(
-      0.f, grand_child_raw->draw_properties().maximum_animation_contents_scale);
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_parent_raw));
+  EXPECT_EQ(10.f, GetMaximumAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_child_raw));
 
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(2.f,
-            parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            child_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(
-      0.f,
-      grand_child_raw->draw_properties().starting_animation_contents_scale);
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_parent_raw));
+  EXPECT_EQ(2.f, GetStartingAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_child_raw));
 
   parent_raw->SetTransform(perspective_matrix);
   grand_parent_raw->layer_tree_impl()->property_trees()->needs_rebuild = true;
   ExecuteCalculateDrawProperties(grand_parent_raw);
 
   // |parent| and |child| have transforms that are neither translations nor
   // scales.
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f, child_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(
-      0.f, grand_child_raw->draw_properties().maximum_animation_contents_scale);
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_child_raw));
 
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            child_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(
-      0.f,
-      grand_child_raw->draw_properties().starting_animation_contents_scale);
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_child_raw));
 
   parent_raw->SetTransform(identity_matrix);
   child_raw->SetTransform(identity_matrix);
   grand_parent_raw->SetTransform(perspective_matrix);
   grand_parent_raw->layer_tree_impl()->property_trees()->needs_rebuild = true;
 
   ExecuteCalculateDrawProperties(grand_parent_raw);
 
   // |grand_parent| has a transform that's neither a translation nor a scale.
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(0.f, child_raw->draw_properties().maximum_animation_contents_scale);
-  EXPECT_EQ(
-      0.f, grand_child_raw->draw_properties().maximum_animation_contents_scale);
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetMaximumAnimationScale(grand_child_raw));
 
-  EXPECT_EQ(
-      0.f,
-      grand_parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            parent_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(0.f,
-            child_raw->draw_properties().starting_animation_contents_scale);
-  EXPECT_EQ(
-      0.f,
-      grand_child_raw->draw_properties().starting_animation_contents_scale);
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(parent_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(child_raw));
+  EXPECT_EQ(0.f, GetStartingAnimationScale(grand_child_raw));
 }
 
 static void GatherDrawnLayers(LayerImplList* rsll,
                               std::set<LayerImpl*>* drawn_layers) {
   for (LayerIterator it = LayerIterator::Begin(rsll),
                      end = LayerIterator::End(rsll);
        it != end; ++it) {
     LayerImpl* layer = *it;
     if (it.represents_itself())
       drawn_layers->insert(layer);
@@ skipping 333 matching lines @@
   root_layer->layer_tree_impl()->property_trees()->needs_rebuild = true;
   ExecuteCalculateDrawProperties(root_layer);
 
   EXPECT_FLOAT_EQ(1.f, root_layer->GetIdealContentsScale());
   EXPECT_FLOAT_EQ(3.f, child1_layer->GetIdealContentsScale());
   EXPECT_FLOAT_EQ(
       3.f,
       child1_layer->test_properties()->mask_layer->GetIdealContentsScale());
   EXPECT_FLOAT_EQ(5.f, child2_layer->GetIdealContentsScale());
 
-  EXPECT_FLOAT_EQ(
-      0.f, root_layer->draw_properties().maximum_animation_contents_scale);
-  EXPECT_FLOAT_EQ(
-      0.f, child1_layer->draw_properties().maximum_animation_contents_scale);
-  EXPECT_FLOAT_EQ(
-      8.f, child2_layer->draw_properties().maximum_animation_contents_scale);
+  EXPECT_FLOAT_EQ(0.f, GetMaximumAnimationScale(root_layer));
+  EXPECT_FLOAT_EQ(0.f, GetMaximumAnimationScale(child1_layer));
+  EXPECT_FLOAT_EQ(8.f, GetMaximumAnimationScale(child2_layer));
 
   // Changing page-scale would affect ideal_contents_scale and
   // maximum_animation_contents_scale.
 
   float page_scale_factor = 3.f;
   float device_scale_factor = 1.0f;
   std::vector<LayerImpl*> render_surface_layer_list;
   gfx::Size device_viewport_size =
       gfx::Size(root_layer->bounds().width() * device_scale_factor,
                 root_layer->bounds().height() * device_scale_factor);
   LayerTreeHostCommon::CalcDrawPropsImplInputsForTesting inputs(
       root_layer, device_viewport_size, &render_surface_layer_list);
 
   inputs.page_scale_factor = page_scale_factor;
   inputs.can_adjust_raster_scales = true;
   inputs.page_scale_layer = root_layer;
   LayerTreeHostCommon::CalculateDrawPropertiesForTesting(&inputs);
 
   EXPECT_FLOAT_EQ(3.f, root_layer->GetIdealContentsScale());
   EXPECT_FLOAT_EQ(9.f, child1_layer->GetIdealContentsScale());
   EXPECT_FLOAT_EQ(
       9.f,
       child1_layer->test_properties()->mask_layer->GetIdealContentsScale());
   EXPECT_FLOAT_EQ(9.f, child1_layer->test_properties()
                            ->replica_layer->test_properties()
                            ->mask_layer->GetIdealContentsScale());
   EXPECT_FLOAT_EQ(15.f, child2_layer->GetIdealContentsScale());
 
-  EXPECT_FLOAT_EQ(
-      0.f, root_layer->draw_properties().maximum_animation_contents_scale);
-  EXPECT_FLOAT_EQ(
-      0.f, child1_layer->draw_properties().maximum_animation_contents_scale);
-  EXPECT_FLOAT_EQ(
-      24.f, child2_layer->draw_properties().maximum_animation_contents_scale);
+  EXPECT_FLOAT_EQ(0.f, GetMaximumAnimationScale(root_layer));
+  EXPECT_FLOAT_EQ(0.f, GetMaximumAnimationScale(child1_layer));
+  EXPECT_FLOAT_EQ(24.f, GetMaximumAnimationScale(child2_layer));
 
   // Changing device-scale would affect ideal_contents_scale and
   // maximum_animation_contents_scale.
 
   device_scale_factor = 4.0f;
   inputs.device_scale_factor = device_scale_factor;
   inputs.can_adjust_raster_scales = true;
   root_layer->layer_tree_impl()->property_trees()->needs_rebuild = true;
   LayerTreeHostCommon::CalculateDrawPropertiesForTesting(&inputs);
 
   EXPECT_FLOAT_EQ(12.f, root_layer->GetIdealContentsScale());
   EXPECT_FLOAT_EQ(36.f, child1_layer->GetIdealContentsScale());
   EXPECT_FLOAT_EQ(
       36.f,
       child1_layer->test_properties()->mask_layer->GetIdealContentsScale());
   EXPECT_FLOAT_EQ(36.f, child1_layer->test_properties()
                             ->replica_layer->test_properties()
                             ->mask_layer->GetIdealContentsScale());
   EXPECT_FLOAT_EQ(60.f, child2_layer->GetIdealContentsScale());
 
-  EXPECT_FLOAT_EQ(
-      0.f, root_layer->draw_properties().maximum_animation_contents_scale);
-  EXPECT_FLOAT_EQ(
-      0.f, child1_layer->draw_properties().maximum_animation_contents_scale);
-  EXPECT_FLOAT_EQ(
-      96.f, child2_layer->draw_properties().maximum_animation_contents_scale);
+  EXPECT_FLOAT_EQ(0.f, GetMaximumAnimationScale(root_layer));
+  EXPECT_FLOAT_EQ(0.f, GetMaximumAnimationScale(child1_layer));
+  EXPECT_FLOAT_EQ(96.f, GetMaximumAnimationScale(child2_layer));
+}
+
+TEST_F(LayerTreeHostCommonTest, AnimationScales) {
+  FakeImplTaskRunnerProvider task_runner_provider;
+  TestSharedBitmapManager shared_bitmap_manager;
+  TestTaskGraphRunner task_graph_runner;
+  LayerTreeSettings settings = host()->settings();
+  settings.layer_transforms_should_scale_layer_contents = true;
+  FakeLayerTreeHostImpl host_impl(settings, &task_runner_provider,
+                                  &shared_bitmap_manager, &task_graph_runner);
+
+  std::unique_ptr<LayerImpl> root =
+      LayerImpl::Create(host_impl.active_tree(), 1);
+  LayerImpl* root_layer = root.get();
+  std::unique_ptr<LayerImpl> child1 =
+      LayerImpl::Create(host_impl.active_tree(), 2);
+  LayerImpl* child1_layer = child1.get();
+  std::unique_ptr<LayerImpl> child2 =
+      LayerImpl::Create(host_impl.active_tree(), 3);
+  LayerImpl* child2_layer = child2.get();
+
+  root->test_properties()->AddChild(std::move(child1));
+  child1_layer->test_properties()->AddChild(std::move(child2));
+  host_impl.active_tree()->SetRootLayerForTesting(std::move(root));
+
+  host_impl.active_tree()->SetElementIdsForTesting();
+
+  gfx::Transform identity_matrix, scale_transform_child1,
+      scale_transform_child2;
+  scale_transform_child1.Scale(2, 3);
+  scale_transform_child2.Scale(4, 5);
+
+  SetLayerPropertiesForTesting(root_layer, identity_matrix, gfx::Point3F(),
+                               gfx::PointF(), gfx::Size(1, 1), true, false,
+                               true);
+  SetLayerPropertiesForTesting(child1_layer, scale_transform_child1,
+                               gfx::Point3F(), gfx::PointF(), gfx::Size(1, 1),
+                               true, false, false);
+
+  TransformOperations scale;
+  scale.AppendScale(5.f, 8.f, 3.f);
+
+  scoped_refptr<AnimationTimeline> timeline =
+      AnimationTimeline::Create(AnimationIdProvider::NextTimelineId());
+  host_impl.animation_host()->AddAnimationTimeline(timeline);
+
+  AddAnimatedTransformToElementWithPlayer(child2_layer->element_id(), timeline,
+                                          1.0, TransformOperations(), scale);
+
+  SetLayerPropertiesForTesting(child2_layer, scale_transform_child2,
+                               gfx::Point3F(), gfx::PointF(), gfx::Size(1, 1),
+                               true, false, false);
+
+  // Correctly computes animation scale when rebuilding property trees.
+  root_layer->layer_tree_impl()->property_trees()->needs_rebuild = true;
+  ExecuteCalculateDrawProperties(root_layer);
+
+  EXPECT_FLOAT_EQ(0.f, GetMaximumAnimationScale(root_layer));
+  EXPECT_FLOAT_EQ(0.f, GetMaximumAnimationScale(child1_layer));
+  EXPECT_FLOAT_EQ(24.f, GetMaximumAnimationScale(child2_layer));
+
+  EXPECT_FLOAT_EQ(0.f, GetStartingAnimationScale(root_layer));
+  EXPECT_FLOAT_EQ(0.f, GetStartingAnimationScale(child1_layer));
+  EXPECT_FLOAT_EQ(3.f, GetStartingAnimationScale(child2_layer));
+
+  // Correctly updates animation scale when layer property changes.
+  child1_layer->SetTransform(identity_matrix);
+  child1_layer->UpdatePropertyTreeTransform();
+  root_layer->layer_tree_impl()->property_trees()->needs_rebuild = false;
+  ExecuteCalculateDrawProperties(root_layer);
+  EXPECT_FLOAT_EQ(8.f, GetMaximumAnimationScale(child2_layer));
+  EXPECT_FLOAT_EQ(1.f, GetStartingAnimationScale(child2_layer));
+
+  // Do not update animation scale if already updated.
+  host_impl.active_tree()->property_trees()->SetAnimationScalesForTesting(
+      child2_layer->transform_tree_index(), 100.f, 100.f);
+  EXPECT_FLOAT_EQ(100.f, GetMaximumAnimationScale(child2_layer));
+  EXPECT_FLOAT_EQ(100.f, GetStartingAnimationScale(child2_layer));
+}
+
+TEST_F(LayerTreeHostCommonTest,
+       AnimationScaleWhenLayerTransformShouldNotScaleLayerBounds) {
+  // Returns empty scale if layer_transforms_should_scale_layer_contents is
+  // false.
+  FakeImplTaskRunnerProvider task_runner_provider;
+  TestSharedBitmapManager shared_bitmap_manager;
+  TestTaskGraphRunner task_graph_runner;
+  LayerTreeSettings settings = host()->settings();
+  settings.layer_transforms_should_scale_layer_contents = false;
+  FakeLayerTreeHostImpl host_impl(settings, &task_runner_provider,
+                                  &shared_bitmap_manager, &task_graph_runner);
+
+  std::unique_ptr<LayerImpl> root =
+      LayerImpl::Create(host_impl.active_tree(), 1);
+  LayerImpl* root_layer = root.get();
+  std::unique_ptr<LayerImpl> child =
+      LayerImpl::Create(host_impl.active_tree(), 2);
+  LayerImpl* child_layer = child.get();
+
+  root->test_properties()->AddChild(std::move(child));
+  host_impl.active_tree()->SetRootLayerForTesting(std::move(root));
+
+  host_impl.active_tree()->SetElementIdsForTesting();
+
+  gfx::Transform identity_matrix, scale_transform_child;
+  scale_transform_child.Scale(4, 5);
+
+  SetLayerPropertiesForTesting(root_layer, identity_matrix, gfx::Point3F(),
+                               gfx::PointF(), gfx::Size(1, 1), true, false,
+                               true);
+  TransformOperations scale;
+  scale.AppendScale(5.f, 8.f, 3.f);
+
+  scoped_refptr<AnimationTimeline> timeline =
+      AnimationTimeline::Create(AnimationIdProvider::NextTimelineId());
+  host_impl.animation_host()->AddAnimationTimeline(timeline);
+
+  AddAnimatedTransformToElementWithPlayer(child_layer->element_id(), timeline,
+                                          1.0, TransformOperations(), scale);
+
+  SetLayerPropertiesForTesting(child_layer, scale_transform_child,
+                               gfx::Point3F(), gfx::PointF(), gfx::Size(1, 1),
+                               true, false, false);
+
+  root_layer->layer_tree_impl()->property_trees()->needs_rebuild = true;
+  ExecuteCalculateDrawProperties(root_layer);
+
+  EXPECT_FLOAT_EQ(0.f, GetMaximumAnimationScale(root_layer));
+  EXPECT_FLOAT_EQ(0.f, GetMaximumAnimationScale(child_layer));
+
+  EXPECT_FLOAT_EQ(0.f, GetStartingAnimationScale(root_layer));
+  EXPECT_FLOAT_EQ(0.f, GetStartingAnimationScale(child_layer));
 }
 
 TEST_F(LayerTreeHostCommonTest, VisibleContentRectInChildRenderSurface) {
   LayerImpl* root = root_layer_for_testing();
   LayerImpl* clip = AddChild<LayerImpl>(root);
   LayerImpl* content = AddChild<LayerImpl>(clip);
 
   const gfx::Transform identity_matrix;
   SetLayerPropertiesForTesting(root, identity_matrix, gfx::Point3F(),
                                gfx::PointF(), gfx::Size(768 / 2, 3000), true,
@@ skipping 2295 matching lines @@
   EXPECT_EQ(scroll_child6.id, grand_child10->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent3->scroll_tree_index());
   EXPECT_EQ(scroll_child7.id, child8->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent4->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, child9->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, grand_child12->scroll_tree_index());
 }
 
 }  // namespace
 }  // namespace cc