cc/trees/tree_synchronizer_unittest.cc

   1 // Copyright 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/trees/tree_synchronizer.h"
   6
   7 #include <algorithm>
   8 #include <set>
   9 #include <vector>
  10
  11 #include "base/format_macros.h"
  12 #include "base/strings/stringprintf.h"
  13 #include "cc/animation/layer_animation_controller.h"
  14 #include "cc/layers/layer.h"
  15 #include "cc/layers/layer_impl.h"
  16 #include "cc/test/animation_test_common.h"
  17 #include "cc/test/fake_impl_proxy.h"
  18 #include "cc/test/fake_layer_tree_host.h"
  19 #include "cc/test/fake_rendering_stats_instrumentation.h"
  20 #include "cc/test/test_shared_bitmap_manager.h"
  21 #include "cc/trees/proxy.h"
  22 #include "cc/trees/single_thread_proxy.h"
  23 #include "testing/gtest/include/gtest/gtest.h"
  24
  25 namespace cc {
  26 namespace {
  27
  28 class MockLayerImpl : public LayerImpl {
  29  public:
  30   static scoped_ptr<MockLayerImpl> Create(LayerTreeImpl* tree_impl,
  31                                           int layer_id) {
  32     return make_scoped_ptr(new MockLayerImpl(tree_impl, layer_id));
  33   }
  34   ~MockLayerImpl() override {
  35     if (layer_impl_destruction_list_)
  36       layer_impl_destruction_list_->push_back(id());
  37   }
  38
  39   void SetLayerImplDestructionList(std::vector<int>* list) {
  40     layer_impl_destruction_list_ = list;
  41   }
  42
  43  private:
  44   MockLayerImpl(LayerTreeImpl* tree_impl, int layer_id)
  45       : LayerImpl(tree_impl, layer_id),
  46         layer_impl_destruction_list_(NULL) {}
  47
  48   std::vector<int>* layer_impl_destruction_list_;
  49 };
  50
  51 class MockLayer : public Layer {
  52  public:
  53   static scoped_refptr<MockLayer> Create(
  54       std::vector<int>* layer_impl_destruction_list) {
  55     return make_scoped_refptr(new MockLayer(layer_impl_destruction_list));
  56   }
  57
  58   scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override {
  59     return MockLayerImpl::Create(tree_impl, layer_id_);
  60   }
  61
  62   void PushPropertiesTo(LayerImpl* layer_impl) override {
  63     Layer::PushPropertiesTo(layer_impl);
  64
  65     MockLayerImpl* mock_layer_impl = static_cast<MockLayerImpl*>(layer_impl);
  66     mock_layer_impl->SetLayerImplDestructionList(layer_impl_destruction_list_);
  67   }
  68
  69  private:
  70   explicit MockLayer(std::vector<int>* layer_impl_destruction_list)
  71       : Layer(), layer_impl_destruction_list_(layer_impl_destruction_list) {}
  72   ~MockLayer() override {}
  73
  74   std::vector<int>* layer_impl_destruction_list_;
  75 };
  76
  77 class FakeLayerAnimationController : public LayerAnimationController {
  78  public:
  79   static scoped_refptr<LayerAnimationController> Create() {
  80     return static_cast<LayerAnimationController*>(
  81         new FakeLayerAnimationController);
  82   }
  83
  84   bool SynchronizedAnimations() const { return synchronized_animations_; }
  85
  86  private:
  87   FakeLayerAnimationController()
  88       : LayerAnimationController(1),
  89         synchronized_animations_(false) {}
  90
  91   ~FakeLayerAnimationController() override {}
  92
  93   void PushAnimationUpdatesTo(
  94       LayerAnimationController* controller_impl) override {
  95     LayerAnimationController::PushAnimationUpdatesTo(controller_impl);
  96     synchronized_animations_ = true;
  97   }
  98
  99   bool synchronized_animations_;
 100 };
 101
 102 void ExpectTreesAreIdentical(Layer* layer,
 103                              LayerImpl* layer_impl,
 104                              LayerTreeImpl* tree_impl) {
 105   ASSERT_TRUE(layer);
 106   ASSERT_TRUE(layer_impl);
 107
 108   EXPECT_EQ(layer->id(), layer_impl->id());
 109   EXPECT_EQ(layer_impl->layer_tree_impl(), tree_impl);
 110
 111   EXPECT_EQ(layer->non_fast_scrollable_region(),
 112             layer_impl->non_fast_scrollable_region());
 113
 114   ASSERT_EQ(!!layer->mask_layer(), !!layer_impl->mask_layer());
 115   if (layer->mask_layer()) {
 116     SCOPED_TRACE("mask_layer");
 117     ExpectTreesAreIdentical(
 118         layer->mask_layer(), layer_impl->mask_layer(), tree_impl);
 119   }
 120
 121   ASSERT_EQ(!!layer->replica_layer(), !!layer_impl->replica_layer());
 122   if (layer->replica_layer()) {
 123     SCOPED_TRACE("replica_layer");
 124     ExpectTreesAreIdentical(
 125         layer->replica_layer(), layer_impl->replica_layer(), tree_impl);
 126   }
 127
 128   const LayerList& layer_children = layer->children();
 129   const OwnedLayerImplList& layer_impl_children = layer_impl->children();
 130
 131   ASSERT_EQ(layer_children.size(), layer_impl_children.size());
 132
 133   const std::set<Layer*>* layer_scroll_children = layer->scroll_children();
 134   const std::set<LayerImpl*>* layer_impl_scroll_children =
 135       layer_impl->scroll_children();
 136
 137   ASSERT_EQ(!!layer_scroll_children, !!layer_impl_scroll_children);
 138
 139   if (layer_scroll_children) {
 140     ASSERT_EQ(
 141         layer_scroll_children->size(),
 142         layer_impl_scroll_children->size());
 143   }
 144
 145   const Layer* layer_scroll_parent = layer->scroll_parent();
 146   const LayerImpl* layer_impl_scroll_parent = layer_impl->scroll_parent();
 147
 148   ASSERT_EQ(!!layer_scroll_parent, !!layer_impl_scroll_parent);
 149
 150   if (layer_scroll_parent) {
 151     ASSERT_EQ(layer_scroll_parent->id(), layer_impl_scroll_parent->id());
 152     ASSERT_TRUE(layer_scroll_parent->scroll_children()->find(layer) !=
 153         layer_scroll_parent->scroll_children()->end());
 154     ASSERT_TRUE(layer_impl_scroll_parent->scroll_children()->find(layer_impl) !=
 155         layer_impl_scroll_parent->scroll_children()->end());
 156   }
 157
 158   const std::set<Layer*>* layer_clip_children = layer->clip_children();
 159   const std::set<LayerImpl*>* layer_impl_clip_children =
 160       layer_impl->clip_children();
 161
 162   ASSERT_EQ(!!layer_clip_children, !!layer_impl_clip_children);
 163
 164   if (layer_clip_children)
 165     ASSERT_EQ(layer_clip_children->size(), layer_impl_clip_children->size());
 166
 167   const Layer* layer_clip_parent = layer->clip_parent();
 168   const LayerImpl* layer_impl_clip_parent = layer_impl->clip_parent();
 169
 170   ASSERT_EQ(!!layer_clip_parent, !!layer_impl_clip_parent);
 171
 172   if (layer_clip_parent) {
 173     const std::set<LayerImpl*>* clip_children_impl =
 174         layer_impl_clip_parent->clip_children();
 175     const std::set<Layer*>* clip_children =
 176         layer_clip_parent->clip_children();
 177     ASSERT_EQ(layer_clip_parent->id(), layer_impl_clip_parent->id());
 178     ASSERT_TRUE(clip_children->find(layer) != clip_children->end());
 179     ASSERT_TRUE(clip_children_impl->find(layer_impl) !=
 180                 clip_children_impl->end());
 181   }
 182
 183   for (size_t i = 0; i < layer_children.size(); ++i) {
 184     SCOPED_TRACE(base::StringPrintf("child layer %" PRIuS, i).c_str());
 185     ExpectTreesAreIdentical(
 186         layer_children[i].get(), layer_impl_children[i], tree_impl);
 187   }
 188 }
 189
 190 class TreeSynchronizerTest : public testing::Test {
 191  public:
 192   TreeSynchronizerTest()
 193       : client_(FakeLayerTreeHostClient::DIRECT_3D),
 194         host_(FakeLayerTreeHost::Create(&client_)) {}
 195
 196  protected:
 197   FakeLayerTreeHostClient client_;
 198   scoped_ptr<FakeLayerTreeHost> host_;
 199 };
 200
 201 // Attempts to synchronizes a null tree. This should not crash, and should
 202 // return a null tree.
 203 TEST_F(TreeSynchronizerTest, SyncNullTree) {
 204   scoped_ptr<LayerImpl> layer_impl_tree_root =
 205       TreeSynchronizer::SynchronizeTrees(
 206           static_cast<Layer*>(NULL), nullptr, host_->active_tree());
 207
 208   EXPECT_TRUE(!layer_impl_tree_root.get());
 209 }
 210
 211 // Constructs a very simple tree and synchronizes it without trying to reuse any
 212 // preexisting layers.
 213 TEST_F(TreeSynchronizerTest, SyncSimpleTreeFromEmpty) {
 214   scoped_refptr<Layer> layer_tree_root = Layer::Create();
 215   layer_tree_root->AddChild(Layer::Create());
 216   layer_tree_root->AddChild(Layer::Create());
 217
 218   host_->SetRootLayer(layer_tree_root);
 219
 220   scoped_ptr<LayerImpl> layer_impl_tree_root =
 221       TreeSynchronizer::SynchronizeTrees(
 222           layer_tree_root.get(), nullptr, host_->active_tree());
 223
 224   ExpectTreesAreIdentical(layer_tree_root.get(),
 225                           layer_impl_tree_root.get(),
 226                           host_->active_tree());
 227 }
 228
 229 // Constructs a very simple tree and synchronizes it attempting to reuse some
 230 // layers
 231 TEST_F(TreeSynchronizerTest, SyncSimpleTreeReusingLayers) {
 232   std::vector<int> layer_impl_destruction_list;
 233
 234   scoped_refptr<Layer> layer_tree_root =
 235       MockLayer::Create(&layer_impl_destruction_list);
 236   layer_tree_root->AddChild(MockLayer::Create(&layer_impl_destruction_list));
 237   layer_tree_root->AddChild(MockLayer::Create(&layer_impl_destruction_list));
 238
 239   host_->SetRootLayer(layer_tree_root);
 240
 241   scoped_ptr<LayerImpl> layer_impl_tree_root =
 242       TreeSynchronizer::SynchronizeTrees(
 243           layer_tree_root.get(), nullptr, host_->active_tree());
 244   ExpectTreesAreIdentical(layer_tree_root.get(),
 245                           layer_impl_tree_root.get(),
 246                           host_->active_tree());
 247
 248   // We have to push properties to pick up the destruction list pointer.
 249   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 250                                    layer_impl_tree_root.get());
 251
 252   // Add a new layer to the Layer side
 253   layer_tree_root->children()[0]->
 254       AddChild(MockLayer::Create(&layer_impl_destruction_list));
 255   // Remove one.
 256   layer_tree_root->children()[1]->RemoveFromParent();
 257   int second_layer_impl_id = layer_impl_tree_root->children()[1]->id();
 258
 259   // Synchronize again. After the sync the trees should be equivalent and we
 260   // should have created and destroyed one LayerImpl.
 261   layer_impl_tree_root =
 262       TreeSynchronizer::SynchronizeTrees(layer_tree_root.get(),
 263                                          layer_impl_tree_root.Pass(),
 264                                          host_->active_tree());
 265   ExpectTreesAreIdentical(layer_tree_root.get(),
 266                           layer_impl_tree_root.get(),
 267                           host_->active_tree());
 268
 269   ASSERT_EQ(1u, layer_impl_destruction_list.size());
 270   EXPECT_EQ(second_layer_impl_id, layer_impl_destruction_list[0]);
 271 }
 272
 273 // Constructs a very simple tree and checks that a stacking-order change is
 274 // tracked properly.
 275 TEST_F(TreeSynchronizerTest, SyncSimpleTreeAndTrackStackingOrderChange) {
 276   std::vector<int> layer_impl_destruction_list;
 277
 278   // Set up the tree and sync once. child2 needs to be synced here, too, even
 279   // though we remove it to set up the intended scenario.
 280   scoped_refptr<Layer> layer_tree_root =
 281       MockLayer::Create(&layer_impl_destruction_list);
 282   scoped_refptr<Layer> child2 = MockLayer::Create(&layer_impl_destruction_list);
 283   layer_tree_root->AddChild(MockLayer::Create(&layer_impl_destruction_list));
 284   layer_tree_root->AddChild(child2);
 285
 286   host_->SetRootLayer(layer_tree_root);
 287
 288   scoped_ptr<LayerImpl> layer_impl_tree_root =
 289       TreeSynchronizer::SynchronizeTrees(
 290           layer_tree_root.get(), nullptr, host_->active_tree());
 291   ExpectTreesAreIdentical(layer_tree_root.get(),
 292                           layer_impl_tree_root.get(),
 293                           host_->active_tree());
 294
 295   // We have to push properties to pick up the destruction list pointer.
 296   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 297                                    layer_impl_tree_root.get());
 298
 299   layer_impl_tree_root->ResetAllChangeTrackingForSubtree();
 300
 301   // re-insert the layer and sync again.
 302   child2->RemoveFromParent();
 303   layer_tree_root->AddChild(child2);
 304   layer_impl_tree_root =
 305       TreeSynchronizer::SynchronizeTrees(layer_tree_root.get(),
 306                                          layer_impl_tree_root.Pass(),
 307                                          host_->active_tree());
 308   ExpectTreesAreIdentical(layer_tree_root.get(),
 309                           layer_impl_tree_root.get(),
 310                           host_->active_tree());
 311
 312   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 313                                    layer_impl_tree_root.get());
 314
 315   // Check that the impl thread properly tracked the change.
 316   EXPECT_FALSE(layer_impl_tree_root->LayerPropertyChanged());
 317   EXPECT_FALSE(layer_impl_tree_root->children()[0]->LayerPropertyChanged());
 318   EXPECT_TRUE(layer_impl_tree_root->children()[1]->LayerPropertyChanged());
 319 }
 320
 321 TEST_F(TreeSynchronizerTest, SyncSimpleTreeAndProperties) {
 322   scoped_refptr<Layer> layer_tree_root = Layer::Create();
 323   layer_tree_root->AddChild(Layer::Create());
 324   layer_tree_root->AddChild(Layer::Create());
 325
 326   host_->SetRootLayer(layer_tree_root);
 327
 328   // Pick some random properties to set. The values are not important, we're
 329   // just testing that at least some properties are making it through.
 330   gfx::PointF root_position = gfx::PointF(2.3f, 7.4f);
 331   layer_tree_root->SetPosition(root_position);
 332
 333   float first_child_opacity = 0.25f;
 334   layer_tree_root->children()[0]->SetOpacity(first_child_opacity);
 335
 336   gfx::Size second_child_bounds = gfx::Size(25, 53);
 337   layer_tree_root->children()[1]->SetBounds(second_child_bounds);
 338   layer_tree_root->children()[1]->SavePaintProperties();
 339
 340   scoped_ptr<LayerImpl> layer_impl_tree_root =
 341       TreeSynchronizer::SynchronizeTrees(
 342           layer_tree_root.get(), nullptr, host_->active_tree());
 343   ExpectTreesAreIdentical(layer_tree_root.get(),
 344                           layer_impl_tree_root.get(),
 345                           host_->active_tree());
 346
 347   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 348                                    layer_impl_tree_root.get());
 349
 350   // Check that the property values we set on the Layer tree are reflected in
 351   // the LayerImpl tree.
 352   gfx::PointF root_layer_impl_position = layer_impl_tree_root->position();
 353   EXPECT_EQ(root_position.x(), root_layer_impl_position.x());
 354   EXPECT_EQ(root_position.y(), root_layer_impl_position.y());
 355
 356   EXPECT_EQ(first_child_opacity,
 357             layer_impl_tree_root->children()[0]->opacity());
 358
 359   gfx::Size second_layer_impl_child_bounds =
 360       layer_impl_tree_root->children()[1]->bounds();
 361   EXPECT_EQ(second_child_bounds.width(),
 362             second_layer_impl_child_bounds.width());
 363   EXPECT_EQ(second_child_bounds.height(),
 364             second_layer_impl_child_bounds.height());
 365 }
 366
 367 TEST_F(TreeSynchronizerTest, ReuseLayerImplsAfterStructuralChange) {
 368   std::vector<int> layer_impl_destruction_list;
 369
 370   // Set up a tree with this sort of structure:
 371   // root --- A --- B ---+--- C
 372   //                     |
 373   //                     +--- D
 374   scoped_refptr<Layer> layer_tree_root =
 375       MockLayer::Create(&layer_impl_destruction_list);
 376   layer_tree_root->AddChild(MockLayer::Create(&layer_impl_destruction_list));
 377
 378   scoped_refptr<Layer> layer_a = layer_tree_root->children()[0].get();
 379   layer_a->AddChild(MockLayer::Create(&layer_impl_destruction_list));
 380
 381   scoped_refptr<Layer> layer_b = layer_a->children()[0].get();
 382   layer_b->AddChild(MockLayer::Create(&layer_impl_destruction_list));
 383
 384   scoped_refptr<Layer> layer_c = layer_b->children()[0].get();
 385   layer_b->AddChild(MockLayer::Create(&layer_impl_destruction_list));
 386   scoped_refptr<Layer> layer_d = layer_b->children()[1].get();
 387
 388   host_->SetRootLayer(layer_tree_root);
 389
 390   scoped_ptr<LayerImpl> layer_impl_tree_root =
 391       TreeSynchronizer::SynchronizeTrees(
 392           layer_tree_root.get(), nullptr, host_->active_tree());
 393   ExpectTreesAreIdentical(layer_tree_root.get(),
 394                           layer_impl_tree_root.get(),
 395                           host_->active_tree());
 396
 397   // We have to push properties to pick up the destruction list pointer.
 398   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 399                                    layer_impl_tree_root.get());
 400
 401   // Now restructure the tree to look like this:
 402   // root --- D ---+--- A
 403   //               |
 404   //               +--- C --- B
 405   layer_tree_root->RemoveAllChildren();
 406   layer_d->RemoveAllChildren();
 407   layer_tree_root->AddChild(layer_d);
 408   layer_a->RemoveAllChildren();
 409   layer_d->AddChild(layer_a);
 410   layer_c->RemoveAllChildren();
 411   layer_d->AddChild(layer_c);
 412   layer_b->RemoveAllChildren();
 413   layer_c->AddChild(layer_b);
 414
 415   // After another synchronize our trees should match and we should not have
 416   // destroyed any LayerImpls
 417   layer_impl_tree_root =
 418       TreeSynchronizer::SynchronizeTrees(layer_tree_root.get(),
 419                                          layer_impl_tree_root.Pass(),
 420                                          host_->active_tree());
 421   ExpectTreesAreIdentical(layer_tree_root.get(),
 422                           layer_impl_tree_root.get(),
 423                           host_->active_tree());
 424
 425   EXPECT_EQ(0u, layer_impl_destruction_list.size());
 426 }
 427
 428 // Constructs a very simple tree, synchronizes it, then synchronizes to a
 429 // totally new tree. All layers from the old tree should be deleted.
 430 TEST_F(TreeSynchronizerTest, SyncSimpleTreeThenDestroy) {
 431   std::vector<int> layer_impl_destruction_list;
 432
 433   scoped_refptr<Layer> old_layer_tree_root =
 434       MockLayer::Create(&layer_impl_destruction_list);
 435   old_layer_tree_root->AddChild(
 436       MockLayer::Create(&layer_impl_destruction_list));
 437   old_layer_tree_root->AddChild(
 438       MockLayer::Create(&layer_impl_destruction_list));
 439
 440   host_->SetRootLayer(old_layer_tree_root);
 441
 442   int old_tree_root_layer_id = old_layer_tree_root->id();
 443   int old_tree_first_child_layer_id = old_layer_tree_root->children()[0]->id();
 444   int old_tree_second_child_layer_id = old_layer_tree_root->children()[1]->id();
 445
 446   scoped_ptr<LayerImpl> layer_impl_tree_root =
 447       TreeSynchronizer::SynchronizeTrees(
 448           old_layer_tree_root.get(), nullptr, host_->active_tree());
 449   ExpectTreesAreIdentical(old_layer_tree_root.get(),
 450                           layer_impl_tree_root.get(),
 451                           host_->active_tree());
 452
 453   // We have to push properties to pick up the destruction list pointer.
 454   TreeSynchronizer::PushProperties(old_layer_tree_root.get(),
 455                                    layer_impl_tree_root.get());
 456
 457   // Remove all children on the Layer side.
 458   old_layer_tree_root->RemoveAllChildren();
 459
 460   // Synchronize again. After the sync all LayerImpls from the old tree should
 461   // be deleted.
 462   scoped_refptr<Layer> new_layer_tree_root = Layer::Create();
 463   host_->SetRootLayer(new_layer_tree_root);
 464   layer_impl_tree_root =
 465       TreeSynchronizer::SynchronizeTrees(new_layer_tree_root.get(),
 466                                          layer_impl_tree_root.Pass(),
 467                                          host_->active_tree());
 468   ExpectTreesAreIdentical(new_layer_tree_root.get(),
 469                           layer_impl_tree_root.get(),
 470                           host_->active_tree());
 471
 472   ASSERT_EQ(3u, layer_impl_destruction_list.size());
 473
 474   EXPECT_TRUE(std::find(layer_impl_destruction_list.begin(),
 475                         layer_impl_destruction_list.end(),
 476                         old_tree_root_layer_id) !=
 477               layer_impl_destruction_list.end());
 478   EXPECT_TRUE(std::find(layer_impl_destruction_list.begin(),
 479                         layer_impl_destruction_list.end(),
 480                         old_tree_first_child_layer_id) !=
 481               layer_impl_destruction_list.end());
 482   EXPECT_TRUE(std::find(layer_impl_destruction_list.begin(),
 483                         layer_impl_destruction_list.end(),
 484                         old_tree_second_child_layer_id) !=
 485               layer_impl_destruction_list.end());
 486 }
 487
 488 // Constructs+syncs a tree with mask, replica, and replica mask layers.
 489 TEST_F(TreeSynchronizerTest, SyncMaskReplicaAndReplicaMaskLayers) {
 490   scoped_refptr<Layer> layer_tree_root = Layer::Create();
 491   layer_tree_root->AddChild(Layer::Create());
 492   layer_tree_root->AddChild(Layer::Create());
 493   layer_tree_root->AddChild(Layer::Create());
 494
 495   // First child gets a mask layer.
 496   scoped_refptr<Layer> mask_layer = Layer::Create();
 497   layer_tree_root->children()[0]->SetMaskLayer(mask_layer.get());
 498
 499   // Second child gets a replica layer.
 500   scoped_refptr<Layer> replica_layer = Layer::Create();
 501   layer_tree_root->children()[1]->SetReplicaLayer(replica_layer.get());
 502
 503   // Third child gets a replica layer with a mask layer.
 504   scoped_refptr<Layer> replica_layer_with_mask = Layer::Create();
 505   scoped_refptr<Layer> replica_mask_layer = Layer::Create();
 506   replica_layer_with_mask->SetMaskLayer(replica_mask_layer.get());
 507   layer_tree_root->children()[2]->
 508       SetReplicaLayer(replica_layer_with_mask.get());
 509
 510   host_->SetRootLayer(layer_tree_root);
 511
 512   scoped_ptr<LayerImpl> layer_impl_tree_root =
 513       TreeSynchronizer::SynchronizeTrees(
 514           layer_tree_root.get(), nullptr, host_->active_tree());
 515
 516   ExpectTreesAreIdentical(layer_tree_root.get(),
 517                           layer_impl_tree_root.get(),
 518                           host_->active_tree());
 519
 520   // Remove the mask layer.
 521   layer_tree_root->children()[0]->SetMaskLayer(NULL);
 522   layer_impl_tree_root =
 523       TreeSynchronizer::SynchronizeTrees(layer_tree_root.get(),
 524                                          layer_impl_tree_root.Pass(),
 525                                          host_->active_tree());
 526   ExpectTreesAreIdentical(layer_tree_root.get(),
 527                           layer_impl_tree_root.get(),
 528                           host_->active_tree());
 529
 530   // Remove the replica layer.
 531   layer_tree_root->children()[1]->SetReplicaLayer(NULL);
 532   layer_impl_tree_root =
 533       TreeSynchronizer::SynchronizeTrees(layer_tree_root.get(),
 534                                          layer_impl_tree_root.Pass(),
 535                                          host_->active_tree());
 536   ExpectTreesAreIdentical(layer_tree_root.get(),
 537                           layer_impl_tree_root.get(),
 538                           host_->active_tree());
 539
 540   // Remove the replica mask.
 541   replica_layer_with_mask->SetMaskLayer(NULL);
 542   layer_impl_tree_root =
 543       TreeSynchronizer::SynchronizeTrees(layer_tree_root.get(),
 544                                          layer_impl_tree_root.Pass(),
 545                                          host_->active_tree());
 546   ExpectTreesAreIdentical(layer_tree_root.get(),
 547                           layer_impl_tree_root.get(),
 548                           host_->active_tree());
 549 }
 550
 551 TEST_F(TreeSynchronizerTest, SynchronizeAnimations) {
 552   LayerTreeSettings settings;
 553   FakeProxy proxy;
 554   DebugScopedSetImplThread impl(&proxy);
 555   FakeRenderingStatsInstrumentation stats_instrumentation;
 556   scoped_ptr<SharedBitmapManager> shared_bitmap_manager(
 557       new TestSharedBitmapManager());
 558   scoped_ptr<LayerTreeHostImpl> host_impl =
 559       LayerTreeHostImpl::Create(settings, NULL, &proxy, &stats_instrumentation,
 560                                 shared_bitmap_manager.get(), NULL, NULL, 0);
 561
 562   scoped_refptr<Layer> layer_tree_root = Layer::Create();
 563   host_->SetRootLayer(layer_tree_root);
 564
 565   layer_tree_root->SetLayerAnimationControllerForTest(
 566       FakeLayerAnimationController::Create());
 567
 568   EXPECT_FALSE(static_cast<FakeLayerAnimationController*>(
 569       layer_tree_root->layer_animation_controller())->SynchronizedAnimations());
 570
 571   scoped_ptr<LayerImpl> layer_impl_tree_root =
 572       TreeSynchronizer::SynchronizeTrees(
 573           layer_tree_root.get(), nullptr, host_->active_tree());
 574   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 575                                    layer_impl_tree_root.get());
 576   layer_impl_tree_root =
 577       TreeSynchronizer::SynchronizeTrees(layer_tree_root.get(),
 578                                          layer_impl_tree_root.Pass(),
 579                                          host_->active_tree());
 580
 581   EXPECT_TRUE(static_cast<FakeLayerAnimationController*>(
 582       layer_tree_root->layer_animation_controller())->SynchronizedAnimations());
 583 }
 584
 585 TEST_F(TreeSynchronizerTest, SynchronizeScrollParent) {
 586   LayerTreeSettings settings;
 587   FakeProxy proxy;
 588   DebugScopedSetImplThread impl(&proxy);
 589   FakeRenderingStatsInstrumentation stats_instrumentation;
 590   scoped_ptr<SharedBitmapManager> shared_bitmap_manager(
 591       new TestSharedBitmapManager());
 592   scoped_ptr<LayerTreeHostImpl> host_impl =
 593       LayerTreeHostImpl::Create(settings, NULL, &proxy, &stats_instrumentation,
 594                                 shared_bitmap_manager.get(), NULL, NULL, 0);
 595
 596   scoped_refptr<Layer> layer_tree_root = Layer::Create();
 597   scoped_refptr<Layer> scroll_parent = Layer::Create();
 598   layer_tree_root->AddChild(scroll_parent);
 599   layer_tree_root->AddChild(Layer::Create());
 600   layer_tree_root->AddChild(Layer::Create());
 601
 602   host_->SetRootLayer(layer_tree_root);
 603
 604   // First child is the second and third child's scroll parent.
 605   layer_tree_root->children()[1]->SetScrollParent(scroll_parent.get());
 606   layer_tree_root->children()[2]->SetScrollParent(scroll_parent.get());
 607
 608   scoped_ptr<LayerImpl> layer_impl_tree_root =
 609       TreeSynchronizer::SynchronizeTrees(
 610           layer_tree_root.get(), nullptr, host_impl->active_tree());
 611   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 612                                    layer_impl_tree_root.get());
 613   {
 614     SCOPED_TRACE("case one");
 615     ExpectTreesAreIdentical(layer_tree_root.get(),
 616                             layer_impl_tree_root.get(),
 617                             host_impl->active_tree());
 618   }
 619
 620   // Remove the first scroll child.
 621   layer_tree_root->children()[1]->RemoveFromParent();
 622   layer_impl_tree_root =
 623       TreeSynchronizer::SynchronizeTrees(layer_tree_root.get(),
 624                                          layer_impl_tree_root.Pass(),
 625                                          host_impl->active_tree());
 626   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 627                                    layer_impl_tree_root.get());
 628   {
 629     SCOPED_TRACE("case two");
 630     ExpectTreesAreIdentical(layer_tree_root.get(),
 631                             layer_impl_tree_root.get(),
 632                             host_impl->active_tree());
 633   }
 634
 635   // Add an additional scroll layer.
 636   scoped_refptr<Layer> additional_scroll_child = Layer::Create();
 637   layer_tree_root->AddChild(additional_scroll_child);
 638   additional_scroll_child->SetScrollParent(scroll_parent.get());
 639   layer_impl_tree_root =
 640       TreeSynchronizer::SynchronizeTrees(layer_tree_root.get(),
 641                                          layer_impl_tree_root.Pass(),
 642                                          host_impl->active_tree());
 643   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 644                                    layer_impl_tree_root.get());
 645   {
 646     SCOPED_TRACE("case three");
 647     ExpectTreesAreIdentical(layer_tree_root.get(),
 648                             layer_impl_tree_root.get(),
 649                             host_impl->active_tree());
 650   }
 651 }
 652
 653 TEST_F(TreeSynchronizerTest, SynchronizeClipParent) {
 654   LayerTreeSettings settings;
 655   FakeProxy proxy;
 656   DebugScopedSetImplThread impl(&proxy);
 657   FakeRenderingStatsInstrumentation stats_instrumentation;
 658   scoped_ptr<SharedBitmapManager> shared_bitmap_manager(
 659       new TestSharedBitmapManager());
 660   scoped_ptr<LayerTreeHostImpl> host_impl =
 661       LayerTreeHostImpl::Create(settings, NULL, &proxy, &stats_instrumentation,
 662                                 shared_bitmap_manager.get(), NULL, NULL, 0);
 663
 664   scoped_refptr<Layer> layer_tree_root = Layer::Create();
 665   scoped_refptr<Layer> clip_parent = Layer::Create();
 666   scoped_refptr<Layer> intervening = Layer::Create();
 667   scoped_refptr<Layer> clip_child1 = Layer::Create();
 668   scoped_refptr<Layer> clip_child2 = Layer::Create();
 669   layer_tree_root->AddChild(clip_parent);
 670   clip_parent->AddChild(intervening);
 671   intervening->AddChild(clip_child1);
 672   intervening->AddChild(clip_child2);
 673
 674   host_->SetRootLayer(layer_tree_root);
 675
 676   // First child is the second and third child's scroll parent.
 677   clip_child1->SetClipParent(clip_parent.get());
 678   clip_child2->SetClipParent(clip_parent.get());
 679
 680   scoped_ptr<LayerImpl> layer_impl_tree_root =
 681       TreeSynchronizer::SynchronizeTrees(
 682           layer_tree_root.get(), nullptr, host_impl->active_tree());
 683   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 684                                    layer_impl_tree_root.get());
 685   ExpectTreesAreIdentical(layer_tree_root.get(),
 686                           layer_impl_tree_root.get(),
 687                           host_impl->active_tree());
 688
 689   // Remove the first clip child.
 690   clip_child1->RemoveFromParent();
 691   clip_child1 = NULL;
 692
 693   layer_impl_tree_root =
 694       TreeSynchronizer::SynchronizeTrees(layer_tree_root.get(),
 695                                          layer_impl_tree_root.Pass(),
 696                                          host_impl->active_tree());
 697   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 698                                    layer_impl_tree_root.get());
 699   ExpectTreesAreIdentical(layer_tree_root.get(),
 700                           layer_impl_tree_root.get(),
 701                           host_impl->active_tree());
 702
 703   // Add an additional clip child.
 704   scoped_refptr<Layer> additional_clip_child = Layer::Create();
 705   intervening->AddChild(additional_clip_child);
 706   additional_clip_child->SetClipParent(clip_parent.get());
 707   layer_impl_tree_root =
 708       TreeSynchronizer::SynchronizeTrees(layer_tree_root.get(),
 709                                          layer_impl_tree_root.Pass(),
 710                                          host_impl->active_tree());
 711   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 712                                    layer_impl_tree_root.get());
 713   ExpectTreesAreIdentical(layer_tree_root.get(),
 714                           layer_impl_tree_root.get(),
 715                           host_impl->active_tree());
 716
 717   // Remove the nearest clipping ancestor.
 718   clip_parent->RemoveFromParent();
 719   clip_parent = NULL;
 720   layer_impl_tree_root =
 721       TreeSynchronizer::SynchronizeTrees(layer_tree_root.get(),
 722                                          layer_impl_tree_root.Pass(),
 723                                          host_impl->active_tree());
 724   TreeSynchronizer::PushProperties(layer_tree_root.get(),
 725                                    layer_impl_tree_root.get());
 726   ExpectTreesAreIdentical(layer_tree_root.get(),
 727                           layer_impl_tree_root.get(),
 728                           host_impl->active_tree());
 729
 730   // The clip children should have been unhooked.
 731   EXPECT_EQ(2u, intervening->children().size());
 732   EXPECT_FALSE(clip_child2->clip_parent());
 733   EXPECT_FALSE(additional_clip_child->clip_parent());
 734 }
 735
 736 }  // namespace
 737 }  // namespace cc