cc/trees/layer_tree_host_unittest_delegated.cc

   1 // Copyright 2013 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/layer_tree_host.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/bind.h"
  10 #include "base/location.h"
  11 #include "base/synchronization/waitable_event.h"
  12 #include "base/threading/thread.h"
  13 #include "base/time/time.h"
  14 #include "cc/layers/delegated_frame_provider.h"
  15 #include "cc/layers/delegated_frame_resource_collection.h"
  16 #include "cc/layers/delegated_renderer_layer.h"
  17 #include "cc/layers/delegated_renderer_layer_impl.h"
  18 #include "cc/output/compositor_frame.h"
  19 #include "cc/output/compositor_frame_ack.h"
  20 #include "cc/output/delegated_frame_data.h"
  21 #include "cc/quads/render_pass_draw_quad.h"
  22 #include "cc/quads/shared_quad_state.h"
  23 #include "cc/quads/texture_draw_quad.h"
  24 #include "cc/resources/returned_resource.h"
  25 #include "cc/test/fake_delegated_renderer_layer.h"
  26 #include "cc/test/fake_delegated_renderer_layer_impl.h"
  27 #include "cc/test/fake_output_surface.h"
  28 #include "cc/test/layer_tree_test.h"
  29 #include "cc/trees/layer_tree_impl.h"
  30 #include "gpu/GLES2/gl2extchromium.h"
  31
  32 namespace cc {
  33 namespace {
  34
  35 bool ReturnedResourceLower(const ReturnedResource& a,
  36                            const ReturnedResource& b) {
  37   return a.id < b.id;
  38 }
  39
  40 // Tests if the list of resources matches an expectation, modulo the order.
  41 bool ResourcesMatch(ReturnedResourceArray actual,
  42                     unsigned* expected,
  43                     size_t expected_count) {
  44   std::sort(actual.begin(), actual.end(), ReturnedResourceLower);
  45   std::sort(expected, expected + expected_count);
  46   size_t actual_index = 0;
  47
  48   // for each element of the expected array, count off one of the actual array
  49   // (after checking it matches).
  50   for (size_t expected_index = 0; expected_index < expected_count;
  51        ++expected_index) {
  52     EXPECT_LT(actual_index, actual.size());
  53     if (actual_index >= actual.size())
  54       return false;
  55     EXPECT_EQ(actual[actual_index].id, expected[expected_index]);
  56     if (actual[actual_index].id != expected[expected_index])
  57       return false;
  58     EXPECT_GT(actual[actual_index].count, 0);
  59     if (actual[actual_index].count <= 0) {
  60       return false;
  61     } else {
  62       --actual[actual_index].count;
  63       if (actual[actual_index].count == 0)
  64         ++actual_index;
  65     }
  66   }
  67   EXPECT_EQ(actual_index, actual.size());
  68   return actual_index == actual.size();
  69 }
  70
  71 #define EXPECT_RESOURCES(expected, actual) \
  72     EXPECT_TRUE(ResourcesMatch(actual, expected, arraysize(expected)));
  73
  74 // These tests deal with delegated renderer layers.
  75 class LayerTreeHostDelegatedTest : public LayerTreeTest {
  76  protected:
  77   scoped_ptr<DelegatedFrameData> CreateFrameData(
  78       const gfx::Rect& root_output_rect,
  79       const gfx::Rect& root_damage_rect) {
  80     scoped_ptr<DelegatedFrameData> frame(new DelegatedFrameData);
  81
  82     scoped_ptr<RenderPass> root_pass(RenderPass::Create());
  83     root_pass->SetNew(RenderPassId(1, 1),
  84                       root_output_rect,
  85                       root_damage_rect,
  86                       gfx::Transform());
  87     frame->render_pass_list.push_back(root_pass.Pass());
  88     return frame.Pass();
  89   }
  90
  91   scoped_ptr<DelegatedFrameData> CreateInvalidFrameData(
  92       const gfx::Rect& root_output_rect,
  93       const gfx::Rect& root_damage_rect) {
  94     scoped_ptr<DelegatedFrameData> frame(new DelegatedFrameData);
  95
  96     scoped_ptr<RenderPass> root_pass(RenderPass::Create());
  97     root_pass->SetNew(RenderPassId(1, 1),
  98                       root_output_rect,
  99                       root_damage_rect,
 100                       gfx::Transform());
 101
 102     SharedQuadState* shared_quad_state =
 103         root_pass->CreateAndAppendSharedQuadState();
 104
 105     gfx::Rect rect = root_output_rect;
 106     gfx::Rect opaque_rect = root_output_rect;
 107     gfx::Rect visible_rect = root_output_rect;
 108     // An invalid resource id! The resource isn't part of the frame.
 109     unsigned resource_id = 5;
 110     bool premultiplied_alpha = false;
 111     gfx::PointF uv_top_left = gfx::PointF(0.f, 0.f);
 112     gfx::PointF uv_bottom_right = gfx::PointF(1.f, 1.f);
 113     SkColor background_color = 0;
 114     float vertex_opacity[4] = {1.f, 1.f, 1.f, 1.f};
 115     bool flipped = false;
 116     bool nearest_neighbor = false;
 117
 118     TextureDrawQuad* invalid_draw_quad =
 119         root_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 120     invalid_draw_quad->SetNew(shared_quad_state,
 121                               rect,
 122                               opaque_rect,
 123                               visible_rect,
 124                               resource_id,
 125                               premultiplied_alpha,
 126                               uv_top_left,
 127                               uv_bottom_right,
 128                               background_color,
 129                               vertex_opacity,
 130                               flipped,
 131                               nearest_neighbor);
 132
 133     frame->render_pass_list.push_back(root_pass.Pass());
 134     return frame.Pass();
 135   }
 136
 137   void AddTransferableResource(DelegatedFrameData* frame,
 138                                ResourceId resource_id) {
 139     TransferableResource resource;
 140     resource.id = resource_id;
 141     resource.mailbox_holder.texture_target = GL_TEXTURE_2D;
 142     GLbyte arbitrary_mailbox[GL_MAILBOX_SIZE_CHROMIUM] = {
 143         1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2,
 144         3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4,
 145         5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4};
 146     resource.mailbox_holder.mailbox.SetName(arbitrary_mailbox);
 147     frame->resource_list.push_back(resource);
 148   }
 149
 150   void AddTextureQuad(DelegatedFrameData* frame, ResourceId resource_id) {
 151     RenderPass* render_pass = frame->render_pass_list[0];
 152     SharedQuadState* sqs = render_pass->CreateAndAppendSharedQuadState();
 153     TextureDrawQuad* quad =
 154         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 155     float vertex_opacity[4] = { 1.f, 1.f, 1.f, 1.f };
 156     quad->SetNew(sqs,
 157                  gfx::Rect(0, 0, 10, 10),
 158                  gfx::Rect(0, 0, 10, 10),
 159                  gfx::Rect(0, 0, 10, 10),
 160                  resource_id,
 161                  false,
 162                  gfx::PointF(0.f, 0.f),
 163                  gfx::PointF(1.f, 1.f),
 164                  SK_ColorTRANSPARENT,
 165                  vertex_opacity,
 166                  false,
 167                  false);
 168   }
 169
 170   void AddRenderPass(DelegatedFrameData* frame,
 171                      RenderPassId id,
 172                      const gfx::Rect& output_rect,
 173                      const gfx::Rect& damage_rect,
 174                      const FilterOperations& filters,
 175                      const FilterOperations& background_filters) {
 176     for (size_t i = 0; i < frame->render_pass_list.size(); ++i)
 177       DCHECK(id != frame->render_pass_list[i]->id);
 178
 179     scoped_ptr<RenderPass> pass(RenderPass::Create());
 180     pass->SetNew(id,
 181                  output_rect,
 182                  damage_rect,
 183                  gfx::Transform());
 184     frame->render_pass_list.push_back(pass.Pass());
 185
 186     RenderPass* render_pass = frame->render_pass_list[0];
 187     SharedQuadState* sqs = render_pass->CreateAndAppendSharedQuadState();
 188     RenderPassDrawQuad* quad =
 189         render_pass->CreateAndAppendDrawQuad<RenderPassDrawQuad>();
 190
 191     quad->SetNew(sqs,
 192                  output_rect,
 193                  output_rect,
 194                  id,
 195                  0,
 196                  gfx::Vector2dF(),
 197                  gfx::Size(),
 198                  filters,
 199                  gfx::Vector2dF(),
 200                  background_filters);
 201   }
 202
 203   static ResourceId AppendResourceId(
 204       std::vector<ResourceId>* resources_in_last_sent_frame,
 205       ResourceId resource_id) {
 206     resources_in_last_sent_frame->push_back(resource_id);
 207     return resource_id;
 208   }
 209
 210   void ReturnUnusedResourcesFromParent(LayerTreeHostImpl* host_impl) {
 211     DelegatedFrameData* delegated_frame_data =
 212         output_surface()->last_sent_frame().delegated_frame_data.get();
 213     if (!delegated_frame_data)
 214       return;
 215
 216     std::vector<ResourceId> resources_in_last_sent_frame;
 217     for (size_t i = 0; i < delegated_frame_data->resource_list.size(); ++i) {
 218       resources_in_last_sent_frame.push_back(
 219           delegated_frame_data->resource_list[i].id);
 220     }
 221
 222     std::vector<ResourceId> resources_to_return;
 223
 224     const TransferableResourceArray& resources_held_by_parent =
 225         output_surface()->resources_held_by_parent();
 226     for (size_t i = 0; i < resources_held_by_parent.size(); ++i) {
 227       ResourceId resource_in_parent = resources_held_by_parent[i].id;
 228       bool resource_in_parent_is_not_part_of_frame =
 229           std::find(resources_in_last_sent_frame.begin(),
 230                     resources_in_last_sent_frame.end(),
 231                     resource_in_parent) == resources_in_last_sent_frame.end();
 232       if (resource_in_parent_is_not_part_of_frame)
 233         resources_to_return.push_back(resource_in_parent);
 234     }
 235
 236     if (resources_to_return.empty())
 237       return;
 238
 239     CompositorFrameAck ack;
 240     for (size_t i = 0; i < resources_to_return.size(); ++i)
 241       output_surface()->ReturnResource(resources_to_return[i], &ack);
 242     host_impl->ReclaimResources(&ack);
 243   }
 244
 245   void ReturnAllResourcesFromParent(LayerTreeHostImpl* host_impl) {
 246     DelegatedFrameData* delegated_frame_data =
 247         output_surface()->last_sent_frame().delegated_frame_data.get();
 248     if (!delegated_frame_data)
 249       return;
 250
 251     const TransferableResourceArray& resources_held_by_parent =
 252         output_surface()->resources_held_by_parent();
 253
 254     if (resources_held_by_parent.empty())
 255       return;
 256
 257     CompositorFrameAck ack;
 258     for (size_t i = 0; i < resources_held_by_parent.size(); ++i)
 259       output_surface()->ReturnResource(resources_held_by_parent[i].id, &ack);
 260     host_impl->ReclaimResources(&ack);
 261   }
 262 };
 263
 264 class LayerTreeHostDelegatedTestCaseSingleDelegatedLayer
 265     : public LayerTreeHostDelegatedTest,
 266       public DelegatedFrameResourceCollectionClient {
 267  public:
 268   LayerTreeHostDelegatedTestCaseSingleDelegatedLayer()
 269       : resource_collection_(new DelegatedFrameResourceCollection),
 270         available_(false) {
 271     resource_collection_->SetClient(this);
 272   }
 273
 274   void SetupTree() override {
 275     root_ = Layer::Create(layer_settings());
 276     root_->SetBounds(gfx::Size(15, 15));
 277
 278     layer_tree_host()->SetRootLayer(root_);
 279     LayerTreeHostDelegatedTest::SetupTree();
 280   }
 281
 282   void BeginTest() override {
 283     resource_collection_->SetClient(this);
 284     PostSetNeedsCommitToMainThread();
 285   }
 286
 287   void SetFrameData(scoped_ptr<DelegatedFrameData> frame_data) {
 288     RenderPass* root_pass = frame_data->render_pass_list.back();
 289     gfx::Size frame_size = root_pass->output_rect.size();
 290
 291     if (frame_provider_.get() && frame_size == frame_provider_->frame_size()) {
 292       frame_provider_->SetFrameData(frame_data.Pass());
 293       return;
 294     }
 295
 296     if (delegated_.get()) {
 297       delegated_->RemoveFromParent();
 298       delegated_ = NULL;
 299       frame_provider_ = NULL;
 300     }
 301
 302     frame_provider_ = new DelegatedFrameProvider(resource_collection_.get(),
 303                                                  frame_data.Pass());
 304
 305     delegated_ = CreateDelegatedLayer(frame_provider_.get());
 306   }
 307
 308   scoped_refptr<DelegatedRendererLayer> CreateDelegatedLayer(
 309       DelegatedFrameProvider* frame_provider) {
 310     scoped_refptr<DelegatedRendererLayer> delegated =
 311         FakeDelegatedRendererLayer::Create(layer_settings(), frame_provider);
 312     delegated->SetBounds(gfx::Size(10, 10));
 313     delegated->SetIsDrawable(true);
 314
 315     root_->AddChild(delegated);
 316     return delegated;
 317   }
 318
 319   void AfterTest() override { resource_collection_->SetClient(NULL); }
 320
 321   // DelegatedFrameProviderClient implementation.
 322   void UnusedResourcesAreAvailable() override { available_ = true; }
 323
 324   bool TestAndResetAvailable() {
 325     bool available = available_;
 326     available_ = false;
 327     return available;
 328   }
 329
 330  protected:
 331   scoped_refptr<DelegatedFrameResourceCollection> resource_collection_;
 332   scoped_refptr<DelegatedFrameProvider> frame_provider_;
 333   scoped_refptr<Layer> root_;
 334   scoped_refptr<DelegatedRendererLayer> delegated_;
 335   bool available_;
 336 };
 337
 338 class LayerTreeHostDelegatedTestCreateChildId
 339     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
 340  public:
 341   LayerTreeHostDelegatedTestCreateChildId()
 342       : LayerTreeHostDelegatedTestCaseSingleDelegatedLayer(),
 343         num_activates_(0),
 344         did_reset_child_id_(false) {}
 345
 346   void DidCommit() override {
 347     if (TestEnded())
 348       return;
 349     SetFrameData(CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1)));
 350   }
 351
 352   void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
 353     if (host_impl->active_tree()->source_frame_number() < 1)
 354       return;
 355
 356     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
 357     FakeDelegatedRendererLayerImpl* delegated_impl =
 358         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
 359
 360     TestContextProvider* context_provider = static_cast<TestContextProvider*>(
 361         host_impl->output_surface()->context_provider());
 362
 363     ++num_activates_;
 364     switch (num_activates_) {
 365       case 2:
 366         EXPECT_TRUE(delegated_impl->ChildId());
 367         EXPECT_FALSE(did_reset_child_id_);
 368
 369         context_provider->ContextGL()->LoseContextCHROMIUM(
 370             GL_GUILTY_CONTEXT_RESET_ARB,
 371             GL_INNOCENT_CONTEXT_RESET_ARB);
 372         context_provider->ContextGL()->Flush();
 373         break;
 374       case 3:
 375         EXPECT_TRUE(delegated_impl->ChildId());
 376         EXPECT_TRUE(did_reset_child_id_);
 377         EndTest();
 378         break;
 379     }
 380   }
 381
 382   void InitializedRendererOnThread(LayerTreeHostImpl* host_impl,
 383                                    bool success) override {
 384     EXPECT_TRUE(success);
 385
 386     if (num_activates_ < 2)
 387       return;
 388
 389     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
 390     FakeDelegatedRendererLayerImpl* delegated_impl =
 391         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
 392
 393     EXPECT_EQ(2, num_activates_);
 394     EXPECT_FALSE(delegated_impl->ChildId());
 395     did_reset_child_id_ = true;
 396   }
 397
 398  protected:
 399   int num_activates_;
 400   bool did_reset_child_id_;
 401 };
 402
 403 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestCreateChildId);
 404
 405 class LayerTreeHostDelegatedTestDontUseLostChildIdAfterCommit
 406     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
 407  protected:
 408   void BeginTest() override {
 409     SetFrameData(CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1)));
 410     LayerTreeHostDelegatedTestCaseSingleDelegatedLayer::BeginTest();
 411   }
 412
 413   void CommitCompleteOnThread(LayerTreeHostImpl* host_impl) override {
 414     // Act like the context was lost while the layer is in the pending tree.
 415     LayerImpl* root_impl = host_impl->sync_tree()->root_layer();
 416     FakeDelegatedRendererLayerImpl* delegated_impl =
 417         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
 418     delegated_impl->ReleaseResources();
 419   }
 420
 421   void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
 422     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
 423     FakeDelegatedRendererLayerImpl* delegated_impl =
 424         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
 425
 426     // Should not try to activate a frame without a child id. If we did try to
 427     // activate we would crash.
 428     EXPECT_FALSE(delegated_impl->ChildId());
 429     EndTest();
 430   }
 431 };
 432
 433 SINGLE_AND_MULTI_THREAD_TEST_F(
 434     LayerTreeHostDelegatedTestDontUseLostChildIdAfterCommit);
 435
 436 // Test that we can gracefully handle invalid frames after the context was lost.
 437 // For example, we might be trying to use the previous frame in that case and
 438 // have to make sure we don't crash because our resource accounting goes wrong.
 439 class LayerTreeHostDelegatedTestInvalidFrameAfterContextLost
 440     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
 441  public:
 442   LayerTreeHostDelegatedTestInvalidFrameAfterContextLost()
 443       : num_activates_(0), num_output_surfaces_initialized_(0) {}
 444
 445   void DidCommit() override {
 446     if (TestEnded())
 447       return;
 448     scoped_ptr<DelegatedFrameData> frame1 =
 449         CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
 450     AddTextureQuad(frame1.get(), 999);
 451     AddTransferableResource(frame1.get(), 999);
 452     SetFrameData(frame1.Pass());
 453   }
 454
 455   void DidInitializeOutputSurface() override {
 456     if (!num_output_surfaces_initialized_++)
 457       return;
 458
 459     scoped_refptr<DelegatedRendererLayer> old_delegated = delegated_;
 460     SetFrameData(
 461         CreateInvalidFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1)));
 462     // Make sure we end up using the same layer, or we won't test the right
 463     // thing, which is to make sure we can handle an invalid frame when using
 464     // a stale layer from before the context was lost.
 465     DCHECK(delegated_.get() == old_delegated.get());
 466   }
 467
 468   void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
 469     if (host_impl->active_tree()->source_frame_number() < 1)
 470       return;
 471
 472     TestContextProvider* context_provider = static_cast<TestContextProvider*>(
 473         host_impl->output_surface()->context_provider());
 474
 475     ++num_activates_;
 476     switch (num_activates_) {
 477       case 2:
 478         context_provider->ContextGL()->LoseContextCHROMIUM(
 479             GL_GUILTY_CONTEXT_RESET_ARB,
 480             GL_INNOCENT_CONTEXT_RESET_ARB);
 481         break;
 482       case 3:
 483         EndTest();
 484         break;
 485     }
 486   }
 487
 488   void InitializedRendererOnThread(LayerTreeHostImpl* host_impl,
 489                                    bool success) override {
 490     EXPECT_TRUE(success);
 491
 492     if (num_activates_ < 2)
 493       return;
 494
 495     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
 496     FakeDelegatedRendererLayerImpl* delegated_impl =
 497         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
 498
 499     EXPECT_EQ(2, num_activates_);
 500     // Resources should have gotten cleared after the context was lost.
 501     EXPECT_EQ(0U, delegated_impl->Resources().size());
 502   }
 503
 504   void AfterTest() override {
 505     LayerTreeHostDelegatedTestCaseSingleDelegatedLayer::AfterTest();
 506     EXPECT_EQ(2, num_output_surfaces_initialized_);
 507   }
 508
 509  protected:
 510   int num_activates_;
 511   int num_output_surfaces_initialized_;
 512 };
 513
 514 SINGLE_AND_MULTI_THREAD_TEST_F(
 515     LayerTreeHostDelegatedTestInvalidFrameAfterContextLost);
 516
 517 class LayerTreeHostDelegatedTestLayerUsesFrameDamage
 518     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
 519  public:
 520   void DidCommit() override {
 521     int next_source_frame_number = layer_tree_host()->source_frame_number();
 522     switch (next_source_frame_number) {
 523       case 1:
 524         // The first time the layer gets a frame the whole layer should be
 525         // damaged.
 526         SetFrameData(
 527             CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1)));
 528         break;
 529       case 2:
 530         // A different frame size will damage the whole layer.
 531         SetFrameData(
 532             CreateFrameData(gfx::Rect(0, 0, 20, 20), gfx::Rect(0, 0, 0, 0)));
 533         break;
 534       case 3:
 535         // Should create a total amount of gfx::Rect(2, 2, 8, 6) damage:
 536         // (2, 2, 10, 6) clamped to the root output rect.
 537         SetFrameData(
 538             CreateFrameData(gfx::Rect(0, 0, 20, 20), gfx::Rect(2, 2, 5, 5)));
 539         SetFrameData(
 540             CreateFrameData(gfx::Rect(0, 0, 20, 20), gfx::Rect(7, 2, 5, 6)));
 541         break;
 542       case 4:
 543         // Should create zero damage.
 544         layer_tree_host()->SetNeedsCommit();
 545         break;
 546       case 5:
 547         // Should damage the full viewport.
 548         delegated_->SetBounds(gfx::Size(2, 2));
 549         break;
 550       case 6:
 551         // Should create zero damage.
 552         layer_tree_host()->SetNeedsCommit();
 553         break;
 554       case 7:
 555         // Should damage the full layer, tho the frame size is not changing.
 556         delegated_->SetBounds(gfx::Size(6, 6));
 557         SetFrameData(
 558             CreateFrameData(gfx::Rect(0, 0, 20, 20), gfx::Rect(1, 1, 2, 2)));
 559         break;
 560       case 8:
 561         // Should create zero damage.
 562         layer_tree_host()->SetNeedsCommit();
 563         break;
 564       case 9:
 565         // Should create zero damage.
 566         layer_tree_host()->SetNeedsCommit();
 567         break;
 568       case 10:
 569         // Changing the frame size damages the full layer.
 570         SetFrameData(
 571             CreateFrameData(gfx::Rect(0, 0, 5, 5), gfx::Rect(4, 4, 1, 1)));
 572         break;
 573       case 11:
 574         // An invalid frame isn't used, so it should not cause damage.
 575         SetFrameData(CreateInvalidFrameData(gfx::Rect(0, 0, 5, 5),
 576                                             gfx::Rect(4, 4, 1, 1)));
 577         break;
 578       case 12:
 579         // Should create gfx::Rect(1, 1, 2, 2) of damage.
 580         SetFrameData(
 581             CreateFrameData(gfx::Rect(0, 0, 5, 5), gfx::Rect(1, 1, 2, 2)));
 582         break;
 583       case 13:
 584         // Should create zero damage.
 585         layer_tree_host()->SetNeedsCommit();
 586         break;
 587       case 14:
 588         // Moving the layer out of the tree and back in will damage the whole
 589         // impl layer.
 590         delegated_->RemoveFromParent();
 591         layer_tree_host()->root_layer()->AddChild(delegated_);
 592         break;
 593       case 15:
 594         // Make a larger frame with lots of damage. Then a frame smaller than
 595         // the first frame's damage. The entire layer should be damaged, but
 596         // nothing more.
 597         SetFrameData(
 598             CreateFrameData(gfx::Rect(0, 0, 10, 10), gfx::Rect(0, 0, 10, 10)));
 599         SetFrameData(
 600             CreateFrameData(gfx::Rect(0, 0, 5, 5), gfx::Rect(1, 1, 2, 2)));
 601         break;
 602       case 16:
 603         // Make a frame with lots of damage. Then replace it with a frame with
 604         // no damage. The entire layer should be damaged, but nothing more.
 605         SetFrameData(
 606             CreateFrameData(gfx::Rect(0, 0, 10, 10), gfx::Rect(0, 0, 10, 10)));
 607         SetFrameData(
 608             CreateFrameData(gfx::Rect(0, 0, 10, 10), gfx::Rect(0, 0, 0, 0)));
 609         break;
 610       case 17:
 611         // Make another layer that uses the same frame provider. The new layer
 612         // should be damaged.
 613         delegated_copy_ = CreateDelegatedLayer(frame_provider_.get());
 614         delegated_copy_->SetPosition(gfx::Point(5, 0));
 615
 616         // Also set a new frame.
 617         SetFrameData(
 618             CreateFrameData(gfx::Rect(0, 0, 10, 10), gfx::Rect(4, 0, 1, 1)));
 619         break;
 620       case 18:
 621         // Set another new frame, both layers should be damaged in the same
 622         // ways.
 623         SetFrameData(
 624             CreateFrameData(gfx::Rect(0, 0, 10, 10), gfx::Rect(3, 3, 1, 1)));
 625         break;
 626     }
 627   }
 628
 629   DrawResult PrepareToDrawOnThread(LayerTreeHostImpl* host_impl,
 630                                    LayerTreeHostImpl::FrameData* frame,
 631                                    DrawResult draw_result) override {
 632     EXPECT_EQ(DRAW_SUCCESS, draw_result);
 633
 634     gfx::Rect damage_rect;
 635     if (!frame->has_no_damage) {
 636       damage_rect = frame->render_passes.back()->damage_rect;
 637     } else {
 638       // If there is no damage, then we have no render passes to send.
 639       EXPECT_TRUE(frame->render_passes.empty());
 640     }
 641
 642     switch (host_impl->active_tree()->source_frame_number()) {
 643       case 0:
 644         // First frame is damaged because of viewport resize.
 645         EXPECT_EQ(gfx::Rect(15, 15).ToString(), damage_rect.ToString());
 646         break;
 647       case 1:
 648         EXPECT_EQ(gfx::Rect(10, 10).ToString(), damage_rect.ToString());
 649         break;
 650       case 2:
 651         EXPECT_EQ(gfx::Rect(10, 10).ToString(), damage_rect.ToString());
 652         break;
 653       case 3:
 654         EXPECT_EQ(gfx::Rect(2, 2, 8, 6).ToString(), damage_rect.ToString());
 655         break;
 656       case 4:
 657         EXPECT_EQ(gfx::Rect().ToString(), damage_rect.ToString());
 658         break;
 659       case 5:
 660         EXPECT_EQ(gfx::Rect(10, 10).ToString(), damage_rect.ToString());
 661         break;
 662       case 6:
 663         EXPECT_EQ(gfx::Rect().ToString(), damage_rect.ToString());
 664         break;
 665       case 7:
 666         EXPECT_EQ(gfx::Rect(6, 6).ToString(), damage_rect.ToString());
 667         break;
 668       case 8:
 669         EXPECT_EQ(gfx::Rect().ToString(), damage_rect.ToString());
 670         break;
 671       case 9:
 672         EXPECT_EQ(gfx::Rect().ToString(), damage_rect.ToString());
 673         break;
 674       case 10:
 675         EXPECT_EQ(gfx::Rect(10, 10).ToString(), damage_rect.ToString());
 676         break;
 677       case 11:
 678         EXPECT_EQ(gfx::Rect().ToString(), damage_rect.ToString());
 679         break;
 680       case 12:
 681         EXPECT_EQ(gfx::Rect(1, 1, 2, 2).ToString(), damage_rect.ToString());
 682         break;
 683       case 13:
 684         EXPECT_EQ(gfx::Rect().ToString(), damage_rect.ToString());
 685         break;
 686       case 14:
 687         EXPECT_EQ(gfx::Rect(10, 10).ToString(), damage_rect.ToString());
 688         break;
 689       case 15:
 690         EXPECT_EQ(gfx::Rect(10, 10).ToString(), damage_rect.ToString());
 691         break;
 692       case 16:
 693         EXPECT_EQ(gfx::Rect(10, 10).ToString(), damage_rect.ToString());
 694         break;
 695       case 17:
 696         EXPECT_EQ(gfx::UnionRects(gfx::Rect(5, 0, 10, 10),
 697                                   gfx::Rect(4, 0, 1, 1)).ToString(),
 698                   damage_rect.ToString());
 699         break;
 700       case 18:
 701         EXPECT_EQ(gfx::Rect(3, 3, 6, 1).ToString(), damage_rect.ToString());
 702         EndTest();
 703         break;
 704     }
 705
 706     return draw_result;
 707   }
 708
 709  protected:
 710   scoped_refptr<DelegatedRendererLayer> delegated_copy_;
 711 };
 712
 713 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestLayerUsesFrameDamage);
 714
 715 class LayerTreeHostDelegatedTestMergeResources
 716     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
 717  public:
 718   void BeginTest() override {
 719     // Push two frames to the delegated renderer layer with no commit between.
 720
 721     // The first frame has resource 999.
 722     scoped_ptr<DelegatedFrameData> frame1 =
 723         CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
 724     AddTextureQuad(frame1.get(), 999);
 725     AddTransferableResource(frame1.get(), 999);
 726     SetFrameData(frame1.Pass());
 727
 728     // The second frame uses resource 999 still, but also adds 555.
 729     scoped_ptr<DelegatedFrameData> frame2 =
 730         CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
 731     AddTextureQuad(frame2.get(), 999);
 732     AddTransferableResource(frame2.get(), 999);
 733     AddTextureQuad(frame2.get(), 555);
 734     AddTransferableResource(frame2.get(), 555);
 735     SetFrameData(frame2.Pass());
 736
 737     // The resource 999 from frame1 is returned since it is still on the main
 738     // thread.
 739     ReturnedResourceArray returned_resources;
 740     resource_collection_->TakeUnusedResourcesForChildCompositor(
 741         &returned_resources);
 742     {
 743       unsigned expected[] = {999};
 744       EXPECT_RESOURCES(expected, returned_resources);
 745       EXPECT_TRUE(TestAndResetAvailable());
 746     }
 747
 748     PostSetNeedsCommitToMainThread();
 749   }
 750
 751   void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
 752     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
 753     FakeDelegatedRendererLayerImpl* delegated_impl =
 754         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
 755
 756     const ResourceProvider::ResourceIdMap& map =
 757         host_impl->resource_provider()->GetChildToParentMap(
 758             delegated_impl->ChildId());
 759
 760     // Both frames' resources should be in the parent's resource provider.
 761     EXPECT_EQ(2u, map.size());
 762     EXPECT_EQ(1u, map.count(999));
 763     EXPECT_EQ(1u, map.count(555));
 764
 765     EXPECT_EQ(2u, delegated_impl->Resources().size());
 766     EXPECT_EQ(1u, delegated_impl->Resources().count(999));
 767     EXPECT_EQ(1u, delegated_impl->Resources().count(555));
 768
 769     EndTest();
 770   }
 771 };
 772
 773 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestMergeResources);
 774
 775 class LayerTreeHostDelegatedTestRemapResourcesInQuads
 776     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
 777  public:
 778   void BeginTest() override {
 779     // Generate a frame with two resources in it.
 780     scoped_ptr<DelegatedFrameData> frame =
 781         CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
 782     AddTextureQuad(frame.get(), 999);
 783     AddTransferableResource(frame.get(), 999);
 784     AddTextureQuad(frame.get(), 555);
 785     AddTransferableResource(frame.get(), 555);
 786     SetFrameData(frame.Pass());
 787
 788     PostSetNeedsCommitToMainThread();
 789   }
 790
 791   void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
 792     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
 793     FakeDelegatedRendererLayerImpl* delegated_impl =
 794         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
 795
 796     const ResourceProvider::ResourceIdMap& map =
 797         host_impl->resource_provider()->GetChildToParentMap(
 798             delegated_impl->ChildId());
 799
 800     // The frame's resource should be in the parent's resource provider.
 801     EXPECT_EQ(2u, map.size());
 802     EXPECT_EQ(1u, map.count(999));
 803     EXPECT_EQ(1u, map.count(555));
 804
 805     ResourceId parent_resource_id1 = map.find(999)->second;
 806     EXPECT_NE(parent_resource_id1, 999u);
 807     ResourceId parent_resource_id2 = map.find(555)->second;
 808     EXPECT_NE(parent_resource_id2, 555u);
 809
 810     // The resources in the quads should be remapped to the parent's namespace.
 811     const TextureDrawQuad* quad1 = TextureDrawQuad::MaterialCast(
 812         delegated_impl->RenderPassesInDrawOrder()[0]->quad_list.ElementAt(0));
 813     EXPECT_EQ(parent_resource_id1, quad1->resource_id());
 814     const TextureDrawQuad* quad2 = TextureDrawQuad::MaterialCast(
 815         delegated_impl->RenderPassesInDrawOrder()[0]->quad_list.ElementAt(1));
 816     EXPECT_EQ(parent_resource_id2, quad2->resource_id());
 817
 818     EndTest();
 819   }
 820 };
 821
 822 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestRemapResourcesInQuads);
 823
 824 class LayerTreeHostDelegatedTestReturnUnusedResources
 825     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
 826  public:
 827   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
 828
 829   void DidCommitAndDrawFrame() override {
 830     scoped_ptr<DelegatedFrameData> frame;
 831     ReturnedResourceArray resources;
 832
 833     int next_source_frame_number = layer_tree_host()->source_frame_number();
 834     switch (next_source_frame_number) {
 835       case 1:
 836         // Generate a frame with two resources in it.
 837         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
 838         AddTextureQuad(frame.get(), 999);
 839         AddTransferableResource(frame.get(), 999);
 840         AddTextureQuad(frame.get(), 555);
 841         AddTransferableResource(frame.get(), 555);
 842         SetFrameData(frame.Pass());
 843         break;
 844       case 2:
 845         // All of the resources are in use.
 846         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
 847         EXPECT_EQ(0u, resources.size());
 848         EXPECT_FALSE(TestAndResetAvailable());
 849
 850         // Keep using 999 but stop using 555.
 851         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
 852         AddTextureQuad(frame.get(), 999);
 853         AddTransferableResource(frame.get(), 999);
 854         AddTextureQuad(frame.get(), 444);
 855         AddTransferableResource(frame.get(), 444);
 856         SetFrameData(frame.Pass());
 857         break;
 858       case 3:
 859         // 555 is no longer in use.
 860         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
 861         {
 862           unsigned expected[] = {555};
 863           EXPECT_RESOURCES(expected, resources);
 864           EXPECT_TRUE(TestAndResetAvailable());
 865         }
 866
 867         // Stop using any resources.
 868         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
 869         SetFrameData(frame.Pass());
 870         break;
 871       case 4:
 872         // Postpone collecting resources for a frame. They should still be there
 873         // the next frame.
 874         layer_tree_host()->SetNeedsCommit();
 875         return;
 876       case 5:
 877         // 444 and 999 are no longer in use. We sent two refs to 999, so we
 878         // should get two back.
 879         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
 880         {
 881           unsigned expected[] = {444, 999, 999};
 882           EXPECT_RESOURCES(expected, resources);
 883           EXPECT_TRUE(TestAndResetAvailable());
 884         }
 885         EndTest();
 886         break;
 887     }
 888
 889     // Resources are never immediately released.
 890     ReturnedResourceArray empty_resources;
 891     resource_collection_->TakeUnusedResourcesForChildCompositor(
 892         &empty_resources);
 893     EXPECT_EQ(0u, empty_resources.size());
 894     EXPECT_FALSE(TestAndResetAvailable());
 895   }
 896
 897   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
 898     ReturnUnusedResourcesFromParent(host_impl);
 899   }
 900 };
 901
 902 SINGLE_AND_MULTI_THREAD_TEST_F(
 903     LayerTreeHostDelegatedTestReturnUnusedResources);
 904
 905 class LayerTreeHostDelegatedTestReusedResources
 906     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
 907  public:
 908   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
 909
 910   void DidCommitAndDrawFrame() override {
 911     scoped_ptr<DelegatedFrameData> frame;
 912     ReturnedResourceArray resources;
 913
 914     int next_source_frame_number = layer_tree_host()->source_frame_number();
 915     switch (next_source_frame_number) {
 916       case 1:
 917         // Generate a frame with some resources in it.
 918         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
 919         AddTextureQuad(frame.get(), 999);
 920         AddTransferableResource(frame.get(), 999);
 921         AddTextureQuad(frame.get(), 555);
 922         AddTransferableResource(frame.get(), 555);
 923         AddTextureQuad(frame.get(), 444);
 924         AddTransferableResource(frame.get(), 444);
 925         SetFrameData(frame.Pass());
 926         break;
 927       case 2:
 928         // All of the resources are in use.
 929         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
 930         EXPECT_EQ(0u, resources.size());
 931         EXPECT_FALSE(TestAndResetAvailable());
 932
 933         // Keep using 999 but stop using 555 and 444.
 934         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
 935         AddTextureQuad(frame.get(), 999);
 936         AddTransferableResource(frame.get(), 999);
 937         SetFrameData(frame.Pass());
 938
 939         // Resource are not immediately released.
 940         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
 941         EXPECT_EQ(0u, resources.size());
 942         EXPECT_FALSE(TestAndResetAvailable());
 943
 944         // Now using 555 and 444 again, but not 999.
 945         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
 946         AddTextureQuad(frame.get(), 555);
 947         AddTransferableResource(frame.get(), 555);
 948         AddTextureQuad(frame.get(), 444);
 949         AddTransferableResource(frame.get(), 444);
 950         SetFrameData(frame.Pass());
 951         break;
 952       case 3:
 953         // The 999 resource is the only unused one. Two references were sent, so
 954         // two should be returned.
 955         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
 956         {
 957           unsigned expected[] = {999, 999};
 958           EXPECT_RESOURCES(expected, resources);
 959           EXPECT_TRUE(TestAndResetAvailable());
 960         }
 961         EndTest();
 962         break;
 963     }
 964   }
 965
 966   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
 967     ReturnUnusedResourcesFromParent(host_impl);
 968   }
 969 };
 970
 971 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestReusedResources);
 972
 973 class LayerTreeHostDelegatedTestFrameBeforeAck
 974     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
 975  public:
 976   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
 977
 978   void DidCommitAndDrawFrame() override {
 979     scoped_ptr<DelegatedFrameData> frame;
 980     ReturnedResourceArray resources;
 981
 982     int next_source_frame_number = layer_tree_host()->source_frame_number();
 983     switch (next_source_frame_number) {
 984       case 1:
 985         // Generate a frame with some resources in it.
 986         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
 987         AddTextureQuad(frame.get(), 999);
 988         AddTransferableResource(frame.get(), 999);
 989         AddTextureQuad(frame.get(), 555);
 990         AddTransferableResource(frame.get(), 555);
 991         AddTextureQuad(frame.get(), 444);
 992         AddTransferableResource(frame.get(), 444);
 993         SetFrameData(frame.Pass());
 994         break;
 995       case 2:
 996         // All of the resources are in use.
 997         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
 998         EXPECT_EQ(0u, resources.size());
 999         EXPECT_FALSE(TestAndResetAvailable());
1000
1001         // Keep using 999 but stop using 555 and 444.
1002         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1003         AddTextureQuad(frame.get(), 999);
1004         AddTransferableResource(frame.get(), 999);
1005         SetFrameData(frame.Pass());
1006
1007         // Resource are not immediately released.
1008         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1009         EXPECT_EQ(0u, resources.size());
1010         EXPECT_FALSE(TestAndResetAvailable());
1011
1012         // The parent compositor (this one) does a commit.
1013         break;
1014       case 3:
1015         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1016         {
1017           unsigned expected[] = {444, 555};
1018           EXPECT_RESOURCES(expected, resources);
1019           EXPECT_TRUE(TestAndResetAvailable());
1020         }
1021
1022         // The child compositor sends a frame referring to resources not in the
1023         // frame.
1024         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1025         AddTextureQuad(frame.get(), 999);
1026         AddTextureQuad(frame.get(), 555);
1027         AddTextureQuad(frame.get(), 444);
1028         SetFrameData(frame.Pass());
1029         break;
1030     }
1031   }
1032
1033   void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
1034     if (host_impl->active_tree()->source_frame_number() != 3)
1035       return;
1036
1037     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
1038     FakeDelegatedRendererLayerImpl* delegated_impl =
1039         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
1040
1041     const ResourceProvider::ResourceIdMap& map =
1042         host_impl->resource_provider()->GetChildToParentMap(
1043             delegated_impl->ChildId());
1044
1045     // The bad frame should be dropped. So we should only have one quad (the
1046     // one with resource 999) on the impl tree. And only 999 will be present
1047     // in the parent's resource provider.
1048     EXPECT_EQ(1u, map.size());
1049     EXPECT_EQ(1u, map.count(999));
1050
1051     EXPECT_EQ(1u, delegated_impl->Resources().size());
1052     EXPECT_EQ(1u, delegated_impl->Resources().count(999));
1053
1054     const RenderPass* pass = delegated_impl->RenderPassesInDrawOrder()[0];
1055     EXPECT_EQ(1u, pass->quad_list.size());
1056     const TextureDrawQuad* quad =
1057         TextureDrawQuad::MaterialCast(pass->quad_list.front());
1058     EXPECT_EQ(map.find(999)->second, quad->resource_id());
1059
1060     EndTest();
1061   }
1062
1063   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
1064     ReturnUnusedResourcesFromParent(host_impl);
1065   }
1066 };
1067
1068 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestFrameBeforeAck);
1069
1070 class LayerTreeHostDelegatedTestFrameBeforeTakeResources
1071     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
1072  public:
1073   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
1074
1075   void DidCommitAndDrawFrame() override {
1076     scoped_ptr<DelegatedFrameData> frame;
1077     ReturnedResourceArray resources;
1078
1079     int next_source_frame_number = layer_tree_host()->source_frame_number();
1080     switch (next_source_frame_number) {
1081       case 1:
1082         // Generate a frame with some resources in it.
1083         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1084         AddTextureQuad(frame.get(), 999);
1085         AddTransferableResource(frame.get(), 999);
1086         AddTextureQuad(frame.get(), 555);
1087         AddTransferableResource(frame.get(), 555);
1088         AddTextureQuad(frame.get(), 444);
1089         AddTransferableResource(frame.get(), 444);
1090         SetFrameData(frame.Pass());
1091         break;
1092       case 2:
1093         // All of the resources are in use.
1094         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1095         EXPECT_EQ(0u, resources.size());
1096         EXPECT_FALSE(TestAndResetAvailable());
1097
1098         // Keep using 999 but stop using 555 and 444.
1099         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1100         AddTextureQuad(frame.get(), 999);
1101         AddTransferableResource(frame.get(), 999);
1102         SetFrameData(frame.Pass());
1103
1104         // Resource are not immediately released.
1105         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1106         EXPECT_EQ(0u, resources.size());
1107         EXPECT_FALSE(TestAndResetAvailable());
1108
1109         // The parent compositor (this one) does a commit.
1110         break;
1111       case 3:
1112         // The child compositor sends a frame before taking resources back
1113         // from the previous commit. This frame makes use of the resources 555
1114         // and 444, which were just released during commit.
1115         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1116         AddTextureQuad(frame.get(), 999);
1117         AddTransferableResource(frame.get(), 999);
1118         AddTextureQuad(frame.get(), 555);
1119         AddTransferableResource(frame.get(), 555);
1120         AddTextureQuad(frame.get(), 444);
1121         AddTransferableResource(frame.get(), 444);
1122         SetFrameData(frame.Pass());
1123
1124         // The resources are used by the new frame but are returned anyway since
1125         // we passed them again.
1126         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1127         {
1128           unsigned expected[] = {444, 555};
1129           EXPECT_RESOURCES(expected, resources);
1130           EXPECT_TRUE(TestAndResetAvailable());
1131         }
1132         break;
1133       case 4:
1134         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1135         EXPECT_EQ(0u, resources.size());
1136         EXPECT_FALSE(TestAndResetAvailable());
1137         EndTest();
1138         break;
1139     }
1140   }
1141
1142   void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
1143     if (host_impl->active_tree()->source_frame_number() != 3)
1144       return;
1145
1146     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
1147     FakeDelegatedRendererLayerImpl* delegated_impl =
1148         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
1149
1150     const ResourceProvider::ResourceIdMap& map =
1151         host_impl->resource_provider()->GetChildToParentMap(
1152             delegated_impl->ChildId());
1153
1154     // The third frame has all of the resources in it again, the delegated
1155     // renderer layer should continue to own the resources for it.
1156     EXPECT_EQ(3u, map.size());
1157     EXPECT_EQ(1u, map.count(999));
1158     EXPECT_EQ(1u, map.count(555));
1159     EXPECT_EQ(1u, map.count(444));
1160
1161     EXPECT_EQ(3u, delegated_impl->Resources().size());
1162     EXPECT_EQ(1u, delegated_impl->Resources().count(999));
1163     EXPECT_EQ(1u, delegated_impl->Resources().count(555));
1164     EXPECT_EQ(1u, delegated_impl->Resources().count(444));
1165
1166     const RenderPass* pass = delegated_impl->RenderPassesInDrawOrder()[0];
1167     EXPECT_EQ(3u, pass->quad_list.size());
1168     const TextureDrawQuad* quad1 =
1169         TextureDrawQuad::MaterialCast(pass->quad_list.ElementAt(0));
1170     EXPECT_EQ(map.find(999)->second, quad1->resource_id());
1171     const TextureDrawQuad* quad2 =
1172         TextureDrawQuad::MaterialCast(pass->quad_list.ElementAt(1));
1173     EXPECT_EQ(map.find(555)->second, quad2->resource_id());
1174     const TextureDrawQuad* quad3 =
1175         TextureDrawQuad::MaterialCast(pass->quad_list.ElementAt(2));
1176     EXPECT_EQ(map.find(444)->second, quad3->resource_id());
1177   }
1178
1179   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
1180     ReturnUnusedResourcesFromParent(host_impl);
1181   }
1182 };
1183
1184 SINGLE_AND_MULTI_THREAD_TEST_F(
1185     LayerTreeHostDelegatedTestFrameBeforeTakeResources);
1186
1187 class LayerTreeHostDelegatedTestBadFrame
1188     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
1189  public:
1190   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
1191
1192   void DidCommitAndDrawFrame() override {
1193     scoped_ptr<DelegatedFrameData> frame;
1194     ReturnedResourceArray resources;
1195
1196     int next_source_frame_number = layer_tree_host()->source_frame_number();
1197     switch (next_source_frame_number) {
1198       case 1:
1199         // Generate a frame with some resources in it.
1200         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1201         AddTextureQuad(frame.get(), 999);
1202         AddTransferableResource(frame.get(), 999);
1203         AddTextureQuad(frame.get(), 555);
1204         AddTransferableResource(frame.get(), 555);
1205         SetFrameData(frame.Pass());
1206         break;
1207       case 2:
1208         // All of the resources are in use.
1209         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1210         EXPECT_EQ(0u, resources.size());
1211         EXPECT_FALSE(TestAndResetAvailable());
1212
1213         // Generate a bad frame with a resource the layer doesn't have. The
1214         // 885 and 775 resources are unknown, while ownership of the legit 444
1215         // resource is passed in here. The bad frame does not use any of the
1216         // previous resources, 999 or 555.
1217         // A bad quad is present both before and after the good quad.
1218         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1219         AddTextureQuad(frame.get(), 885);
1220         AddTextureQuad(frame.get(), 444);
1221         AddTransferableResource(frame.get(), 444);
1222         AddTextureQuad(frame.get(), 775);
1223         SetFrameData(frame.Pass());
1224
1225         // The parent compositor (this one) does a commit.
1226         break;
1227       case 3:
1228         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1229         EXPECT_EQ(0u, resources.size());
1230         EXPECT_FALSE(TestAndResetAvailable());
1231
1232         // Now send a good frame with 999 again.
1233         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1234         AddTextureQuad(frame.get(), 999);
1235         SetFrameData(frame.Pass());
1236
1237         // The bad frame's resource is given back to the child compositor.
1238         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1239         {
1240           unsigned expected[] = {444};
1241           EXPECT_RESOURCES(expected, resources);
1242           EXPECT_TRUE(TestAndResetAvailable());
1243         }
1244         break;
1245       case 4:
1246         // The unused 555 from the last good frame is now released.
1247         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1248         {
1249           unsigned expected[] = {555};
1250           EXPECT_RESOURCES(expected, resources);
1251           EXPECT_TRUE(TestAndResetAvailable());
1252         }
1253
1254         EndTest();
1255         break;
1256     }
1257   }
1258
1259   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
1260     if (host_impl->active_tree()->source_frame_number() < 1)
1261       return;
1262
1263     ReturnUnusedResourcesFromParent(host_impl);
1264
1265     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
1266     FakeDelegatedRendererLayerImpl* delegated_impl =
1267         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
1268
1269     const ResourceProvider::ResourceIdMap& map =
1270         host_impl->resource_provider()->GetChildToParentMap(
1271             delegated_impl->ChildId());
1272
1273     switch (host_impl->active_tree()->source_frame_number()) {
1274       case 1: {
1275         // We have the first good frame with just 999 and 555 in it.
1276         // layer.
1277         EXPECT_EQ(2u, map.size());
1278         EXPECT_EQ(1u, map.count(999));
1279         EXPECT_EQ(1u, map.count(555));
1280
1281         EXPECT_EQ(2u, delegated_impl->Resources().size());
1282         EXPECT_EQ(1u, delegated_impl->Resources().count(999));
1283         EXPECT_EQ(1u, delegated_impl->Resources().count(555));
1284
1285         const RenderPass* pass = delegated_impl->RenderPassesInDrawOrder()[0];
1286         EXPECT_EQ(2u, pass->quad_list.size());
1287         const TextureDrawQuad* quad1 =
1288             TextureDrawQuad::MaterialCast(pass->quad_list.ElementAt(0));
1289         EXPECT_EQ(map.find(999)->second, quad1->resource_id());
1290         const TextureDrawQuad* quad2 =
1291             TextureDrawQuad::MaterialCast(pass->quad_list.ElementAt(1));
1292         EXPECT_EQ(map.find(555)->second, quad2->resource_id());
1293         break;
1294       }
1295       case 2: {
1296         // We only keep resources from the last valid frame.
1297         EXPECT_EQ(2u, map.size());
1298         EXPECT_EQ(1u, map.count(999));
1299         EXPECT_EQ(1u, map.count(555));
1300
1301         EXPECT_EQ(2u, delegated_impl->Resources().size());
1302         EXPECT_EQ(1u, delegated_impl->Resources().count(999));
1303         EXPECT_EQ(1u, delegated_impl->Resources().count(555));
1304
1305         // The bad frame is dropped though, we still have the frame with 999 and
1306         // 555 in it.
1307         const RenderPass* pass = delegated_impl->RenderPassesInDrawOrder()[0];
1308         EXPECT_EQ(2u, pass->quad_list.size());
1309         const TextureDrawQuad* quad1 =
1310             TextureDrawQuad::MaterialCast(pass->quad_list.ElementAt(0));
1311         EXPECT_EQ(map.find(999)->second, quad1->resource_id());
1312         const TextureDrawQuad* quad2 =
1313             TextureDrawQuad::MaterialCast(pass->quad_list.ElementAt(1));
1314         EXPECT_EQ(map.find(555)->second, quad2->resource_id());
1315         break;
1316       }
1317       case 3: {
1318         // We have the new good frame with just 999 in it.
1319         EXPECT_EQ(1u, map.size());
1320         EXPECT_EQ(1u, map.count(999));
1321
1322         EXPECT_EQ(1u, delegated_impl->Resources().size());
1323         EXPECT_EQ(1u, delegated_impl->Resources().count(999));
1324
1325         const RenderPass* pass = delegated_impl->RenderPassesInDrawOrder()[0];
1326         EXPECT_EQ(1u, pass->quad_list.size());
1327         const TextureDrawQuad* quad1 =
1328             TextureDrawQuad::MaterialCast(pass->quad_list.front());
1329         EXPECT_EQ(map.find(999)->second, quad1->resource_id());
1330         break;
1331       }
1332     }
1333   }
1334 };
1335
1336 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestBadFrame);
1337
1338 class LayerTreeHostDelegatedTestUnnamedResource
1339     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
1340  public:
1341   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
1342
1343   void DidCommitAndDrawFrame() override {
1344     scoped_ptr<DelegatedFrameData> frame;
1345     ReturnedResourceArray resources;
1346
1347     int next_source_frame_number = layer_tree_host()->source_frame_number();
1348     switch (next_source_frame_number) {
1349       case 1:
1350         // This frame includes two resources in it, but only uses one.
1351         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1352         AddTransferableResource(frame.get(), 999);
1353         AddTextureQuad(frame.get(), 555);
1354         AddTransferableResource(frame.get(), 555);
1355         SetFrameData(frame.Pass());
1356         break;
1357       case 2:
1358         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1359         EXPECT_EQ(0u, resources.size());
1360         EXPECT_FALSE(TestAndResetAvailable());
1361
1362         // Now send an empty frame.
1363         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1364         SetFrameData(frame.Pass());
1365
1366         // The unused resource should be returned.
1367         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1368         {
1369           unsigned expected[] = {999};
1370           EXPECT_RESOURCES(expected, resources);
1371           EXPECT_TRUE(TestAndResetAvailable());
1372         }
1373
1374         EndTest();
1375         break;
1376     }
1377   }
1378
1379   void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
1380     if (host_impl->active_tree()->source_frame_number() != 1)
1381       return;
1382
1383     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
1384     FakeDelegatedRendererLayerImpl* delegated_impl =
1385         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
1386
1387     const ResourceProvider::ResourceIdMap& map =
1388         host_impl->resource_provider()->GetChildToParentMap(
1389             delegated_impl->ChildId());
1390
1391     // The layer only held on to the resource that was used.
1392     EXPECT_EQ(1u, map.size());
1393     EXPECT_EQ(1u, map.count(555));
1394
1395     EXPECT_EQ(1u, delegated_impl->Resources().size());
1396     EXPECT_EQ(1u, delegated_impl->Resources().count(555));
1397   }
1398 };
1399
1400 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestUnnamedResource);
1401
1402 class LayerTreeHostDelegatedTestDontLeakResource
1403     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
1404  public:
1405   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
1406
1407   void DidCommitAndDrawFrame() override {
1408     scoped_ptr<DelegatedFrameData> frame;
1409     ReturnedResourceArray resources;
1410
1411     int next_source_frame_number = layer_tree_host()->source_frame_number();
1412     switch (next_source_frame_number) {
1413       case 1:
1414         // This frame includes two resources in it.
1415         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1416         AddTextureQuad(frame.get(), 999);
1417         AddTransferableResource(frame.get(), 999);
1418         AddTextureQuad(frame.get(), 555);
1419         AddTransferableResource(frame.get(), 555);
1420         SetFrameData(frame.Pass());
1421
1422         // But then we immediately stop using 999.
1423         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1424         AddTextureQuad(frame.get(), 555);
1425         AddTransferableResource(frame.get(), 555);
1426         SetFrameData(frame.Pass());
1427         break;
1428       case 2:
1429         // The unused resources should be returned. 555 is still used, but it's
1430         // returned once to account for the first frame.
1431         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1432         {
1433           unsigned expected[] = {555, 999};
1434           EXPECT_RESOURCES(expected, resources);
1435           EXPECT_TRUE(TestAndResetAvailable());
1436         }
1437         // Send a frame with no resources in it.
1438         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1439         SetFrameData(frame.Pass());
1440         break;
1441       case 3:
1442         // The now unused resource 555 should be returned.
1443         resources.clear();
1444         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1445         {
1446           unsigned expected[] = {555};
1447           EXPECT_RESOURCES(expected, resources);
1448           EXPECT_TRUE(TestAndResetAvailable());
1449         }
1450         EndTest();
1451         break;
1452     }
1453   }
1454
1455   void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
1456     if (host_impl->active_tree()->source_frame_number() != 1)
1457       return;
1458
1459     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
1460     FakeDelegatedRendererLayerImpl* delegated_impl =
1461         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
1462
1463     const ResourceProvider::ResourceIdMap& map =
1464         host_impl->resource_provider()->GetChildToParentMap(
1465             delegated_impl->ChildId());
1466
1467     // The layer only held on to the resource that was used.
1468     EXPECT_EQ(1u, map.size());
1469     EXPECT_EQ(1u, map.count(555));
1470
1471     EXPECT_EQ(1u, delegated_impl->Resources().size());
1472     EXPECT_EQ(1u, delegated_impl->Resources().count(555));
1473   }
1474
1475   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
1476     ReturnUnusedResourcesFromParent(host_impl);
1477   }
1478 };
1479
1480 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestDontLeakResource);
1481
1482 class LayerTreeHostDelegatedTestResourceSentToParent
1483     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
1484  public:
1485   void DidCommitAndDrawFrame() override {
1486     scoped_ptr<DelegatedFrameData> frame;
1487     ReturnedResourceArray resources;
1488
1489     int next_source_frame_number = layer_tree_host()->source_frame_number();
1490     switch (next_source_frame_number) {
1491       case 1:
1492         // This frame includes two resources in it.
1493         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1494         AddTextureQuad(frame.get(), 999);
1495         AddTransferableResource(frame.get(), 999);
1496         AddTextureQuad(frame.get(), 555);
1497         AddTransferableResource(frame.get(), 555);
1498         SetFrameData(frame.Pass());
1499         break;
1500       case 2:
1501         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1502         EXPECT_EQ(0u, resources.size());
1503         EXPECT_FALSE(TestAndResetAvailable());
1504
1505         // 999 is in use in the grandparent compositor, generate a frame without
1506         // it present.
1507         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1508         AddTextureQuad(frame.get(), 555);
1509         AddTransferableResource(frame.get(), 555);
1510         SetFrameData(frame.Pass());
1511         break;
1512       case 3:
1513         // Since 999 is in the grandparent it is not returned.
1514         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1515         EXPECT_EQ(0u, resources.size());
1516         EXPECT_FALSE(TestAndResetAvailable());
1517
1518         // The impl side will get back the resource at some point.
1519         ImplThreadTaskRunner()->PostTask(FROM_HERE,
1520                                          receive_resource_on_thread_);
1521         break;
1522     }
1523   }
1524
1525   void ReceiveResourceOnThread(LayerTreeHostImpl* host_impl) {
1526     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
1527     FakeDelegatedRendererLayerImpl* delegated_impl =
1528         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
1529
1530     const ResourceProvider::ResourceIdMap& map =
1531         host_impl->resource_provider()->GetChildToParentMap(
1532             delegated_impl->ChildId());
1533
1534     // Receive 999 back from the grandparent.
1535     CompositorFrameAck ack;
1536     output_surface()->ReturnResource(map.find(999)->second, &ack);
1537     host_impl->ReclaimResources(&ack);
1538   }
1539
1540   void UnusedResourcesAreAvailable() override {
1541     EXPECT_EQ(3, layer_tree_host()->source_frame_number());
1542
1543     ReturnedResourceArray resources;
1544
1545     // 999 was returned from the grandparent and could be released.
1546     resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1547     {
1548       unsigned expected[] = {999};
1549       EXPECT_RESOURCES(expected, resources);
1550     }
1551
1552     EndTest();
1553   }
1554
1555   void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
1556     if (host_impl->active_tree()->source_frame_number() < 1)
1557       return;
1558
1559     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
1560     FakeDelegatedRendererLayerImpl* delegated_impl =
1561         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
1562
1563     const ResourceProvider::ResourceIdMap& map =
1564         host_impl->resource_provider()->GetChildToParentMap(
1565             delegated_impl->ChildId());
1566
1567     switch (host_impl->active_tree()->source_frame_number()) {
1568       case 1: {
1569         EXPECT_EQ(2u, map.size());
1570         EXPECT_EQ(1u, map.count(999));
1571         EXPECT_EQ(1u, map.count(555));
1572
1573         EXPECT_EQ(2u, delegated_impl->Resources().size());
1574         EXPECT_EQ(1u, delegated_impl->Resources().count(999));
1575         EXPECT_EQ(1u, delegated_impl->Resources().count(555));
1576
1577         // The 999 resource will be sent to a grandparent compositor.
1578         break;
1579       }
1580       case 2: {
1581         EXPECT_EQ(2u, map.size());
1582         EXPECT_EQ(1u, map.count(999));
1583         EXPECT_EQ(1u, map.count(555));
1584
1585         // 999 is in the parent, so not held by delegated renderer layer.
1586         EXPECT_EQ(1u, delegated_impl->Resources().size());
1587         EXPECT_EQ(1u, delegated_impl->Resources().count(555));
1588
1589         receive_resource_on_thread_ =
1590             base::Bind(&LayerTreeHostDelegatedTestResourceSentToParent::
1591                             ReceiveResourceOnThread,
1592                        base::Unretained(this),
1593                        host_impl);
1594         break;
1595       }
1596       case 3:
1597         // 999 should be released.
1598         EXPECT_EQ(1u, map.size());
1599         EXPECT_EQ(1u, map.count(555));
1600
1601         EXPECT_EQ(1u, delegated_impl->Resources().size());
1602         EXPECT_EQ(1u, delegated_impl->Resources().count(map.find(555)->second));
1603         break;
1604     }
1605   }
1606
1607   base::Closure receive_resource_on_thread_;
1608 };
1609
1610 SINGLE_AND_MULTI_THREAD_DELEGATING_RENDERER_TEST_F(
1611     LayerTreeHostDelegatedTestResourceSentToParent);
1612
1613 class LayerTreeHostDelegatedTestCommitWithoutTake
1614     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
1615  public:
1616   void BeginTest() override {
1617     // Prevent drawing with resources that are sent to the grandparent.
1618     layer_tree_host()->SetViewportSize(gfx::Size());
1619     PostSetNeedsCommitToMainThread();
1620   }
1621
1622   void DidCommit() override {
1623     scoped_ptr<DelegatedFrameData> frame;
1624     ReturnedResourceArray resources;
1625
1626     int next_source_frame_number = layer_tree_host()->source_frame_number();
1627     switch (next_source_frame_number) {
1628       case 1:
1629         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1630         AddTextureQuad(frame.get(), 999);
1631         AddTransferableResource(frame.get(), 999);
1632         AddTextureQuad(frame.get(), 555);
1633         AddTransferableResource(frame.get(), 555);
1634         AddTextureQuad(frame.get(), 444);
1635         AddTransferableResource(frame.get(), 444);
1636         SetFrameData(frame.Pass());
1637         break;
1638       case 2:
1639         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1640         EXPECT_EQ(0u, resources.size());
1641         EXPECT_FALSE(TestAndResetAvailable());
1642
1643         // Stop using 999 and 444 in this frame and commit.
1644         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1645         AddTextureQuad(frame.get(), 555);
1646         AddTransferableResource(frame.get(), 555);
1647         SetFrameData(frame.Pass());
1648         // 999 and 444 will be returned for frame 1, but not 555 since it's in
1649         // the current frame.
1650         break;
1651       case 3:
1652         // Don't take resources here, but set a new frame that uses 999 again.
1653         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1654         AddTextureQuad(frame.get(), 999);
1655         AddTransferableResource(frame.get(), 999);
1656         AddTextureQuad(frame.get(), 555);
1657         AddTransferableResource(frame.get(), 555);
1658         SetFrameData(frame.Pass());
1659         break;
1660       case 4:
1661         // 555 from frame 1 and 2 isn't returned since it's still in use. 999
1662         // from frame 1 is returned though.
1663         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1664         {
1665           unsigned expected[] = {444, 999};
1666           EXPECT_RESOURCES(expected, resources);
1667           EXPECT_TRUE(TestAndResetAvailable());
1668         }
1669
1670         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1671         SetFrameData(frame.Pass());
1672         // 555 will be returned 3 times for frames 1 2 and 3, and 999 will be
1673         // returned once for frame 3.
1674         break;
1675       case 5:
1676         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1677         {
1678           unsigned expected[] = {555, 555, 555, 999};
1679           EXPECT_RESOURCES(expected, resources);
1680           EXPECT_TRUE(TestAndResetAvailable());
1681         }
1682
1683         EndTest();
1684         break;
1685     }
1686   }
1687
1688   void DidActivateTreeOnThread(LayerTreeHostImpl* host_impl) override {
1689     if (host_impl->active_tree()->source_frame_number() < 1)
1690       return;
1691
1692     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
1693     FakeDelegatedRendererLayerImpl* delegated_impl =
1694         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
1695
1696     const ResourceProvider::ResourceIdMap& map =
1697         host_impl->resource_provider()->GetChildToParentMap(
1698             delegated_impl->ChildId());
1699
1700     switch (host_impl->active_tree()->source_frame_number()) {
1701       case 1:
1702         EXPECT_EQ(3u, map.size());
1703         EXPECT_EQ(1u, map.count(999));
1704         EXPECT_EQ(1u, map.count(555));
1705         EXPECT_EQ(1u, map.count(444));
1706
1707         EXPECT_EQ(3u, delegated_impl->Resources().size());
1708         EXPECT_EQ(1u, delegated_impl->Resources().count(999));
1709         EXPECT_EQ(1u, delegated_impl->Resources().count(555));
1710         EXPECT_EQ(1u, delegated_impl->Resources().count(444));
1711         break;
1712       case 2:
1713         EXPECT_EQ(1u, map.size());
1714         EXPECT_EQ(1u, map.count(555));
1715
1716         EXPECT_EQ(1u, delegated_impl->Resources().size());
1717         EXPECT_EQ(1u, delegated_impl->Resources().count(555));
1718         break;
1719       case 3:
1720         EXPECT_EQ(2u, map.size());
1721         EXPECT_EQ(1u, map.count(999));
1722         EXPECT_EQ(1u, map.count(555));
1723
1724         EXPECT_EQ(2u, delegated_impl->Resources().size());
1725         EXPECT_EQ(1u, delegated_impl->Resources().count(999));
1726         EXPECT_EQ(1u, delegated_impl->Resources().count(555));
1727     }
1728   }
1729 };
1730
1731 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestCommitWithoutTake);
1732
1733 class DelegatedFrameIsActivatedDuringCommit
1734     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
1735  protected:
1736   DelegatedFrameIsActivatedDuringCommit() : returned_resource_count_(0) {}
1737
1738   void BeginTest() override {
1739     activate_count_ = 0;
1740
1741     scoped_ptr<DelegatedFrameData> frame =
1742         CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1743     AddTextureQuad(frame.get(), 999);
1744     AddTransferableResource(frame.get(), 999);
1745     SetFrameData(frame.Pass());
1746
1747     PostSetNeedsCommitToMainThread();
1748   }
1749
1750   void WillActivateTreeOnThread(LayerTreeHostImpl* impl) override {
1751     ++activate_count_;
1752   }
1753
1754   void DidCommit() override {
1755     switch (layer_tree_host()->source_frame_number()) {
1756       case 1: {
1757         // The first frame has been activated. Set a new frame, and
1758         // expect the next commit to finish *after* it is activated.
1759         scoped_ptr<DelegatedFrameData> frame =
1760             CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1761         AddTextureQuad(frame.get(), 555);
1762         AddTransferableResource(frame.get(), 555);
1763         SetFrameData(frame.Pass());
1764         break;
1765       }
1766       case 2:
1767         // The second frame has been activated. Remove the layer from
1768         // the tree to cause another commit/activation. The commit should
1769         // finish *after* the layer is removed from the active tree.
1770         delegated_->RemoveFromParent();
1771         break;
1772       case 3:
1773         // Finish the test by releasing resources on the next frame.
1774         scoped_ptr<DelegatedFrameData> frame =
1775             CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1776         SetFrameData(frame.Pass());
1777         break;
1778     }
1779   }
1780
1781   void CommitCompleteOnThread(LayerTreeHostImpl* host_impl) override {
1782     switch (host_impl->active_tree()->source_frame_number()) {
1783       case 0: {
1784         // The activate for the 1st frame should have happened before now.
1785         EXPECT_EQ(1, activate_count_);
1786         break;
1787       }
1788       case 1: {
1789         // The activate for the 2nd frame should have happened before now.
1790         EXPECT_EQ(2, activate_count_);
1791         break;
1792       }
1793       case 2: {
1794         // The activate to remove the layer should have happened before now.
1795         EXPECT_EQ(3, activate_count_);
1796         break;
1797       }
1798       case 3: {
1799         NOTREACHED();
1800         break;
1801       }
1802     }
1803   }
1804
1805   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
1806     ReturnUnusedResourcesFromParent(host_impl);
1807   }
1808
1809   void UnusedResourcesAreAvailable() override {
1810     LayerTreeHostDelegatedTestCaseSingleDelegatedLayer::
1811         UnusedResourcesAreAvailable();
1812     ReturnedResourceArray resources;
1813     resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1814     EXPECT_TRUE(TestAndResetAvailable());
1815     returned_resource_count_ += resources.size();
1816     if (returned_resource_count_ == 2)
1817       EndTest();
1818   }
1819
1820   int activate_count_;
1821   size_t returned_resource_count_;
1822 };
1823
1824 SINGLE_AND_MULTI_THREAD_TEST_F(
1825     DelegatedFrameIsActivatedDuringCommit);
1826
1827 class LayerTreeHostDelegatedTestTwoImplLayers
1828     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
1829  public:
1830   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
1831
1832   void DidCommitAndDrawFrame() override {
1833     scoped_ptr<DelegatedFrameData> frame;
1834     ReturnedResourceArray resources;
1835
1836     int next_source_frame_number = layer_tree_host()->source_frame_number();
1837     switch (next_source_frame_number) {
1838       case 1:
1839         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1840         AddTextureQuad(frame.get(), 999);
1841         AddTransferableResource(frame.get(), 999);
1842         AddTextureQuad(frame.get(), 555);
1843         AddTransferableResource(frame.get(), 555);
1844         SetFrameData(frame.Pass());
1845         break;
1846       case 2:
1847         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1848         EXPECT_EQ(0u, resources.size());
1849         EXPECT_FALSE(TestAndResetAvailable());
1850
1851         // Remove the delegated layer and replace it with a new one. Use the
1852         // same frame and resources for it.
1853         delegated_->RemoveFromParent();
1854         delegated_ = CreateDelegatedLayer(frame_provider_.get());
1855         break;
1856       case 3:
1857         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1858         EXPECT_EQ(0u, resources.size());
1859         EXPECT_FALSE(TestAndResetAvailable());
1860
1861         // Use a frame with no resources in it.
1862         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1863         SetFrameData(frame.Pass());
1864         break;
1865       case 4:
1866         // We gave one frame to the frame provider, so we should get one
1867         // ref back for each resource.
1868         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1869         {
1870           unsigned expected[] = {555, 999};
1871           EXPECT_RESOURCES(expected, resources);
1872           EXPECT_TRUE(TestAndResetAvailable());
1873         }
1874         EndTest();
1875         break;
1876     }
1877   }
1878
1879   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
1880     ReturnUnusedResourcesFromParent(host_impl);
1881   }
1882 };
1883
1884 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestTwoImplLayers);
1885
1886 class LayerTreeHostDelegatedTestTwoImplLayersTwoFrames
1887     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
1888  public:
1889   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
1890
1891   void DidCommitAndDrawFrame() override {
1892     scoped_ptr<DelegatedFrameData> frame;
1893     ReturnedResourceArray resources;
1894
1895     int next_source_frame_number = layer_tree_host()->source_frame_number();
1896     switch (next_source_frame_number) {
1897       case 1:
1898         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1899         AddTextureQuad(frame.get(), 999);
1900         AddTransferableResource(frame.get(), 999);
1901         AddTextureQuad(frame.get(), 555);
1902         AddTransferableResource(frame.get(), 555);
1903         SetFrameData(frame.Pass());
1904         break;
1905       case 2:
1906         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1907         EXPECT_EQ(0u, resources.size());
1908         EXPECT_FALSE(TestAndResetAvailable());
1909
1910         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1911         AddTextureQuad(frame.get(), 999);
1912         AddTransferableResource(frame.get(), 999);
1913         AddTextureQuad(frame.get(), 555);
1914         AddTransferableResource(frame.get(), 555);
1915
1916         // Remove the delegated layer and replace it with a new one. Make a new
1917         // frame but with the same resources for it.
1918         delegated_->RemoveFromParent();
1919         delegated_ = NULL;
1920
1921         frame_provider_->SetFrameData(frame.Pass());
1922         delegated_ = CreateDelegatedLayer(frame_provider_.get());
1923         break;
1924       case 3:
1925         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1926         EXPECT_EQ(0u, resources.size());
1927         EXPECT_FALSE(TestAndResetAvailable());
1928
1929         // Use a frame with no resources in it.
1930         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1931         SetFrameData(frame.Pass());
1932         break;
1933       case 4:
1934         // We gave two frames to the frame provider, so we should get two
1935         // refs back for each resource.
1936         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1937         {
1938           unsigned expected[] = {555, 555, 999, 999};
1939           EXPECT_RESOURCES(expected, resources);
1940           EXPECT_TRUE(TestAndResetAvailable());
1941         }
1942         EndTest();
1943         break;
1944     }
1945   }
1946
1947   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
1948     ReturnUnusedResourcesFromParent(host_impl);
1949   }
1950 };
1951
1952 SINGLE_AND_MULTI_THREAD_TEST_F(
1953     LayerTreeHostDelegatedTestTwoImplLayersTwoFrames);
1954
1955 class LayerTreeHostDelegatedTestTwoLayers
1956     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
1957  public:
1958   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
1959
1960   void DidCommitAndDrawFrame() override {
1961     scoped_ptr<DelegatedFrameData> frame;
1962     ReturnedResourceArray resources;
1963
1964     int next_source_frame_number = layer_tree_host()->source_frame_number();
1965     switch (next_source_frame_number) {
1966       case 1:
1967         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
1968         AddTextureQuad(frame.get(), 999);
1969         AddTransferableResource(frame.get(), 999);
1970         AddTextureQuad(frame.get(), 555);
1971         AddTransferableResource(frame.get(), 555);
1972
1973         // Create a DelegatedRendererLayer using the frame.
1974         SetFrameData(frame.Pass());
1975         break;
1976       case 2:
1977         // Create a second DelegatedRendererLayer using the same frame provider.
1978         delegated_thief_ = CreateDelegatedLayer(frame_provider_.get());
1979         root_->AddChild(delegated_thief_);
1980
1981         // And drop our ref on the frame provider so only the layers keep it
1982         // alive.
1983         frame_provider_ = NULL;
1984         break;
1985       case 3:
1986         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1987         EXPECT_EQ(0u, resources.size());
1988         EXPECT_FALSE(TestAndResetAvailable());
1989
1990         // Remove one delegated layer from the tree. No resources should be
1991         // returned yet.
1992         delegated_->RemoveFromParent();
1993         break;
1994       case 4:
1995         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
1996         EXPECT_EQ(0u, resources.size());
1997         EXPECT_FALSE(TestAndResetAvailable());
1998
1999         // Put the first layer back, and remove the other layer and destroy it.
2000         // No resources should be returned yet.
2001         root_->AddChild(delegated_);
2002         delegated_thief_->RemoveFromParent();
2003         delegated_thief_ = NULL;
2004         break;
2005       case 5:
2006         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2007         EXPECT_EQ(0u, resources.size());
2008         EXPECT_FALSE(TestAndResetAvailable());
2009
2010         // Remove the first layer from the tree again. The resources are still
2011         // held by the main thread layer.
2012         delegated_->RemoveFromParent();
2013         break;
2014       case 6:
2015         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2016         EXPECT_EQ(0u, resources.size());
2017         EXPECT_FALSE(TestAndResetAvailable());
2018
2019         // Destroy the layer and the resources should be returned immediately.
2020         delegated_ = NULL;
2021
2022         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2023         {
2024           unsigned expected[] = {555, 999};
2025           EXPECT_RESOURCES(expected, resources);
2026           EXPECT_TRUE(TestAndResetAvailable());
2027         }
2028         EndTest();
2029         break;
2030     }
2031   }
2032
2033   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
2034     ReturnUnusedResourcesFromParent(host_impl);
2035   }
2036
2037   scoped_refptr<DelegatedRendererLayer> delegated_thief_;
2038 };
2039
2040 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestTwoLayers);
2041
2042 class LayerTreeHostDelegatedTestRemoveAndAddToTree
2043     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
2044  public:
2045   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
2046
2047   void DidCommitAndDrawFrame() override {
2048     scoped_ptr<DelegatedFrameData> frame;
2049     ReturnedResourceArray resources;
2050
2051     int next_source_frame_number = layer_tree_host()->source_frame_number();
2052     switch (next_source_frame_number) {
2053       case 1:
2054         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
2055         AddTextureQuad(frame.get(), 999);
2056         AddTransferableResource(frame.get(), 999);
2057         AddTextureQuad(frame.get(), 555);
2058         AddTransferableResource(frame.get(), 555);
2059
2060         // Create a DelegatedRendererLayer using the frame.
2061         SetFrameData(frame.Pass());
2062         break;
2063       case 2:
2064         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2065         EXPECT_EQ(0u, resources.size());
2066         EXPECT_FALSE(TestAndResetAvailable());
2067
2068         // Remove the layer from the tree. The resources should not be returned
2069         // since they are still on the main thread layer.
2070         delegated_->RemoveFromParent();
2071         break;
2072       case 3:
2073         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2074         EXPECT_EQ(0u, resources.size());
2075         EXPECT_FALSE(TestAndResetAvailable());
2076
2077         // Add the layer back to the tree.
2078         layer_tree_host()->root_layer()->AddChild(delegated_);
2079         break;
2080       case 4:
2081         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2082         EXPECT_EQ(0u, resources.size());
2083         EXPECT_FALSE(TestAndResetAvailable());
2084
2085         // Set a new frame. Resources should be returned.
2086         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
2087         AddTextureQuad(frame.get(), 888);
2088         AddTransferableResource(frame.get(), 888);
2089         AddTextureQuad(frame.get(), 777);
2090         AddTransferableResource(frame.get(), 777);
2091         SetFrameData(frame.Pass());
2092         break;
2093       case 5:
2094         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2095         {
2096           unsigned expected[] = {555, 999};
2097           EXPECT_RESOURCES(expected, resources);
2098           EXPECT_TRUE(TestAndResetAvailable());
2099         }
2100
2101         // Destroy the layer.
2102         delegated_->RemoveFromParent();
2103         delegated_ = NULL;
2104         break;
2105       case 6:
2106         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2107         EXPECT_EQ(0u, resources.size());
2108         EXPECT_FALSE(TestAndResetAvailable());
2109
2110         // Destroy the frame provider. Resources should be returned.
2111         frame_provider_ = NULL;
2112
2113         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2114         {
2115           unsigned expected[] = {777, 888};
2116           EXPECT_RESOURCES(expected, resources);
2117           EXPECT_TRUE(TestAndResetAvailable());
2118         }
2119         EndTest();
2120         break;
2121     }
2122   }
2123
2124   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
2125     ReturnUnusedResourcesFromParent(host_impl);
2126   }
2127
2128   scoped_refptr<DelegatedRendererLayer> delegated_thief_;
2129 };
2130
2131 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostDelegatedTestRemoveAndAddToTree);
2132
2133 class LayerTreeHostDelegatedTestRemoveAndChangeResources
2134     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
2135  public:
2136   void BeginTest() override { PostSetNeedsCommitToMainThread(); }
2137
2138   void DidCommitAndDrawFrame() override {
2139     scoped_ptr<DelegatedFrameData> frame;
2140     ReturnedResourceArray resources;
2141
2142     int next_source_frame_number = layer_tree_host()->source_frame_number();
2143     switch (next_source_frame_number) {
2144       case 1:
2145         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
2146         AddTextureQuad(frame.get(), 999);
2147         AddTransferableResource(frame.get(), 999);
2148         AddTextureQuad(frame.get(), 555);
2149         AddTransferableResource(frame.get(), 555);
2150
2151         // Create a DelegatedRendererLayer using the frame.
2152         SetFrameData(frame.Pass());
2153         break;
2154       case 2:
2155         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2156         EXPECT_EQ(0u, resources.size());
2157         EXPECT_FALSE(TestAndResetAvailable());
2158
2159         // Remove the layer from the tree. The resources should not be returned
2160         // since they are still on the main thread layer.
2161         delegated_->RemoveFromParent();
2162         break;
2163       case 3:
2164         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2165         EXPECT_EQ(0u, resources.size());
2166         EXPECT_FALSE(TestAndResetAvailable());
2167
2168         // Set a new frame. Resources should be returned immediately.
2169         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
2170         AddTextureQuad(frame.get(), 888);
2171         AddTransferableResource(frame.get(), 888);
2172         AddTextureQuad(frame.get(), 777);
2173         AddTransferableResource(frame.get(), 777);
2174         SetFrameData(frame.Pass());
2175
2176         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2177         {
2178           unsigned expected[] = {555, 999};
2179           EXPECT_RESOURCES(expected, resources);
2180           EXPECT_TRUE(TestAndResetAvailable());
2181           resources.clear();
2182         }
2183
2184         // Destroy the frame provider.
2185         frame_provider_ = NULL;
2186
2187         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2188         EXPECT_EQ(0u, resources.size());
2189         EXPECT_FALSE(TestAndResetAvailable());
2190
2191         // Destroy the layer. Resources should be returned.
2192         delegated_ = NULL;
2193
2194         resource_collection_->TakeUnusedResourcesForChildCompositor(&resources);
2195         {
2196           unsigned expected[] = {777, 888};
2197           EXPECT_RESOURCES(expected, resources);
2198           EXPECT_TRUE(TestAndResetAvailable());
2199         }
2200         EndTest();
2201         break;
2202     }
2203   }
2204
2205   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
2206     ReturnUnusedResourcesFromParent(host_impl);
2207   }
2208
2209   scoped_refptr<DelegatedRendererLayer> delegated_thief_;
2210 };
2211
2212 SINGLE_AND_MULTI_THREAD_TEST_F(
2213     LayerTreeHostDelegatedTestRemoveAndChangeResources);
2214
2215 class LayerTreeHostDelegatedTestActiveFrameIsValid
2216     : public LayerTreeHostDelegatedTestCaseSingleDelegatedLayer {
2217  public:
2218   LayerTreeHostDelegatedTestActiveFrameIsValid()
2219       : drew_with_pending_tree_(false) {}
2220
2221   void DidCommitAndDrawFrame() override {
2222     scoped_ptr<DelegatedFrameData> frame;
2223     switch (layer_tree_host()->source_frame_number()) {
2224       case 1:
2225         // This frame goes to the active tree.
2226         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
2227         AddTextureQuad(frame.get(), 999);
2228         AddTransferableResource(frame.get(), 999);
2229         SetFrameData(frame.Pass());
2230         break;
2231       case 2:
2232         // This frame stops in the pending tree while we redraw the active tree.
2233         frame = CreateFrameData(gfx::Rect(0, 0, 1, 1), gfx::Rect(0, 0, 1, 1));
2234         AddTextureQuad(frame.get(), 555);
2235         AddTransferableResource(frame.get(), 555);
2236         SetFrameData(frame.Pass());
2237         break;
2238     }
2239   }
2240
2241   void DrawLayersOnThread(LayerTreeHostImpl* host_impl) override {
2242     if (host_impl->active_tree()->source_frame_number() < 1)
2243       return;
2244
2245     LayerImpl* root_impl = host_impl->active_tree()->root_layer();
2246     FakeDelegatedRendererLayerImpl* delegated_impl =
2247         static_cast<FakeDelegatedRendererLayerImpl*>(root_impl->children()[0]);
2248     const ResourceProvider::ResourceIdMap& map =
2249         host_impl->resource_provider()->GetChildToParentMap(
2250             delegated_impl->ChildId());
2251
2252     switch (host_impl->active_tree()->source_frame_number()) {
2253       case 1:
2254         if (!host_impl->pending_tree()) {
2255           // Frame 2 is blocked from activating until another draw happens with
2256           // Frame 1. This ensures we draw a different active frame from
2257           // what's in the pending tree.
2258           host_impl->BlockNotifyReadyToActivateForTesting(true);
2259           host_impl->SetNeedsRedrawRect(gfx::Rect(1, 1));
2260           break;
2261         }
2262
2263         // The resources in the active tree should be valid.
2264         EXPECT_EQ(1u, map.count(999));
2265
2266         host_impl->BlockNotifyReadyToActivateForTesting(false);
2267         drew_with_pending_tree_ = true;
2268         break;
2269       case 2:
2270         EXPECT_TRUE(drew_with_pending_tree_);
2271
2272         // The resources in the active tree should be valid.
2273         EXPECT_EQ(1u, map.count(555));
2274         EndTest();
2275         break;
2276     }
2277   }
2278
2279   void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) override {
2280     // Return everything so that we can reliably delete resources that lose
2281     // their references. This would happen if the tab was backgrounded or
2282     // the parent decided to drop all resources for some reason.
2283     ReturnAllResourcesFromParent(host_impl);
2284   }
2285
2286   bool drew_with_pending_tree_;
2287 };
2288
2289 // This test blocks activation which is not supported for single thread mode.
2290 MULTI_THREAD_BLOCKNOTIFY_TEST_F(LayerTreeHostDelegatedTestActiveFrameIsValid);
2291
2292 }  // namespace
2293 }  // namespace cc