content/browser/renderer_host/compositor_impl_android.cc

   1 // Copyright (c) 2012 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 "content/browser/renderer_host/compositor_impl_android.h"
   6
   7 #include <android/bitmap.h>
   8 #include <android/native_window_jni.h>
   9
  10 #include "base/android/jni_android.h"
  11 #include "base/android/scoped_java_ref.h"
  12 #include "base/bind.h"
  13 #include "base/cancelable_callback.h"
  14 #include "base/command_line.h"
  15 #include "base/containers/hash_tables.h"
  16 #include "base/lazy_instance.h"
  17 #include "base/logging.h"
  18 #include "base/memory/weak_ptr.h"
  19 #include "base/single_thread_task_runner.h"
  20 #include "base/synchronization/lock.h"
  21 #include "base/thread_task_runner_handle.h"
  22 #include "base/threading/simple_thread.h"
  23 #include "base/threading/thread.h"
  24 #include "base/threading/thread_checker.h"
  25 #include "cc/base/switches.h"
  26 #include "cc/input/input_handler.h"
  27 #include "cc/layers/layer.h"
  28 #include "cc/output/compositor_frame.h"
  29 #include "cc/output/context_provider.h"
  30 #include "cc/output/output_surface.h"
  31 #include "cc/output/output_surface_client.h"
  32 #include "cc/raster/task_graph_runner.h"
  33 #include "cc/scheduler/begin_frame_source.h"
  34 #include "cc/surfaces/onscreen_display_client.h"
  35 #include "cc/surfaces/surface_display_output_surface.h"
  36 #include "cc/surfaces/surface_id_allocator.h"
  37 #include "cc/surfaces/surface_manager.h"
  38 #include "cc/trees/layer_tree_host.h"
  39 #include "cc/trees/layer_tree_settings.h"
  40 #include "content/browser/android/child_process_launcher_android.h"
  41 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
  42 #include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
  43 #include "content/browser/gpu/compositor_util.h"
  44 #include "content/browser/gpu/gpu_surface_tracker.h"
  45 #include "content/browser/renderer_host/render_widget_host_impl.h"
  46 #include "content/common/gpu/client/command_buffer_proxy_impl.h"
  47 #include "content/common/gpu/client/context_provider_command_buffer.h"
  48 #include "content/common/gpu/client/gl_helper.h"
  49 #include "content/common/gpu/client/gpu_channel_host.h"
  50 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
  51 #include "content/common/gpu/gpu_process_launch_causes.h"
  52 #include "content/common/host_shared_bitmap_manager.h"
  53 #include "content/public/browser/android/compositor.h"
  54 #include "content/public/browser/android/compositor_client.h"
  55 #include "content/public/common/content_switches.h"
  56 #include "gpu/blink/webgraphicscontext3d_in_process_command_buffer_impl.h"
  57 #include "gpu/command_buffer/client/context_support.h"
  58 #include "gpu/command_buffer/client/gles2_interface.h"
  59 #include "third_party/khronos/GLES2/gl2.h"
  60 #include "third_party/khronos/GLES2/gl2ext.h"
  61 #include "third_party/skia/include/core/SkMallocPixelRef.h"
  62 #include "ui/android/window_android.h"
  63 #include "ui/gfx/android/device_display_info.h"
  64 #include "ui/gfx/swap_result.h"
  65
  66 namespace content {
  67
  68 namespace {
  69
  70 const unsigned int kMaxSwapBuffers = 2U;
  71
  72 // Used to override capabilities_.adjust_deadline_for_parent to false
  73 class OutputSurfaceWithoutParent : public cc::OutputSurface,
  74                                    public CompositorImpl::VSyncObserver {
  75  public:
  76   OutputSurfaceWithoutParent(
  77       CompositorImpl* compositor,
  78       const scoped_refptr<ContextProviderCommandBuffer>& context_provider,
  79       const base::Callback<void(gpu::Capabilities)>&
  80           populate_gpu_capabilities_callback)
  81       : cc::OutputSurface(context_provider),
  82         compositor_(compositor),
  83         populate_gpu_capabilities_callback_(populate_gpu_capabilities_callback),
  84         swap_buffers_completion_callback_(
  85             base::Bind(&OutputSurfaceWithoutParent::OnSwapBuffersCompleted,
  86                        base::Unretained(this))) {
  87     capabilities_.adjust_deadline_for_parent = false;
  88     capabilities_.max_frames_pending = 2;
  89   }
  90
  91   ~OutputSurfaceWithoutParent() override { compositor_->RemoveObserver(this); }
  92
  93   void SwapBuffers(cc::CompositorFrame* frame) override {
  94     GetCommandBufferProxy()->SetLatencyInfo(frame->metadata.latency_info);
  95     DCHECK(frame->gl_frame_data->sub_buffer_rect ==
  96            gfx::Rect(frame->gl_frame_data->size));
  97     context_provider_->ContextSupport()->Swap();
  98     client_->DidSwapBuffers();
  99   }
 100
 101   bool BindToClient(cc::OutputSurfaceClient* client) override {
 102     if (!OutputSurface::BindToClient(client))
 103       return false;
 104
 105     GetCommandBufferProxy()->SetSwapBuffersCompletionCallback(
 106         swap_buffers_completion_callback_.callback());
 107
 108     populate_gpu_capabilities_callback_.Run(
 109         context_provider_->ContextCapabilities().gpu);
 110     compositor_->AddObserver(this);
 111
 112     return true;
 113   }
 114
 115  private:
 116   CommandBufferProxyImpl* GetCommandBufferProxy() {
 117     ContextProviderCommandBuffer* provider_command_buffer =
 118         static_cast<content::ContextProviderCommandBuffer*>(
 119             context_provider_.get());
 120     CommandBufferProxyImpl* command_buffer_proxy =
 121         provider_command_buffer->GetCommandBufferProxy();
 122     DCHECK(command_buffer_proxy);
 123     return command_buffer_proxy;
 124   }
 125
 126   void OnSwapBuffersCompleted(const std::vector<ui::LatencyInfo>& latency_info,
 127                               gfx::SwapResult result) {
 128     RenderWidgetHostImpl::CompositorFrameDrawn(latency_info);
 129     OutputSurface::OnSwapBuffersComplete();
 130   }
 131
 132   void OnUpdateVSyncParameters(base::TimeTicks timebase,
 133                                base::TimeDelta interval) override {
 134     CommitVSyncParameters(timebase, interval);
 135   }
 136
 137   CompositorImpl* compositor_;
 138   base::Callback<void(gpu::Capabilities)> populate_gpu_capabilities_callback_;
 139   base::CancelableCallback<void(const std::vector<ui::LatencyInfo>&,
 140                                 gfx::SwapResult)>
 141       swap_buffers_completion_callback_;
 142 };
 143
 144 static bool g_initialized = false;
 145
 146 bool g_use_surface_manager = false;
 147 base::LazyInstance<cc::SurfaceManager> g_surface_manager =
 148     LAZY_INSTANCE_INITIALIZER;
 149
 150
 151 int g_surface_id_namespace = 0;
 152
 153 class SingleThreadTaskGraphRunner
 154     : public cc::TaskGraphRunner,
 155       public base::DelegateSimpleThread::Delegate {
 156  public:
 157   SingleThreadTaskGraphRunner()
 158       : worker_thread_(
 159             this,
 160             "CompositorTileWorker1",
 161             base::SimpleThread::Options(base::ThreadPriority::BACKGROUND)) {
 162     worker_thread_.Start();
 163   }
 164
 165   ~SingleThreadTaskGraphRunner() override {
 166     Shutdown();
 167     worker_thread_.Join();
 168   }
 169
 170  private:
 171   // Overridden from base::DelegateSimpleThread::Delegate:
 172   void Run() override { cc::TaskGraphRunner::Run(); }
 173
 174   base::DelegateSimpleThread worker_thread_;
 175 };
 176
 177 base::LazyInstance<SingleThreadTaskGraphRunner> g_task_graph_runner =
 178     LAZY_INSTANCE_INITIALIZER;
 179
 180 base::LazyInstance<cc::LayerSettings> g_layer_settings =
 181     LAZY_INSTANCE_INITIALIZER;
 182
 183 } // anonymous namespace
 184
 185 // static
 186 Compositor* Compositor::Create(CompositorClient* client,
 187                                gfx::NativeWindow root_window) {
 188   return client ? new CompositorImpl(client, root_window) : NULL;
 189 }
 190
 191 // static
 192 void Compositor::Initialize() {
 193   DCHECK(!CompositorImpl::IsInitialized());
 194   g_initialized = true;
 195   g_use_surface_manager = UseSurfacesEnabled();
 196 }
 197
 198 // static
 199 const cc::LayerSettings& Compositor::LayerSettings() {
 200   return g_layer_settings.Get();
 201 }
 202
 203 // static
 204 void Compositor::SetLayerSettings(const cc::LayerSettings& settings) {
 205   g_layer_settings.Get() = settings;
 206 }
 207
 208 // static
 209 bool CompositorImpl::IsInitialized() {
 210   return g_initialized;
 211 }
 212
 213 // static
 214 cc::SurfaceManager* CompositorImpl::GetSurfaceManager() {
 215   if (!g_use_surface_manager)
 216     return nullptr;
 217   return g_surface_manager.Pointer();
 218 }
 219
 220 // static
 221 scoped_ptr<cc::SurfaceIdAllocator> CompositorImpl::CreateSurfaceIdAllocator() {
 222   scoped_ptr<cc::SurfaceIdAllocator> allocator(
 223       new cc::SurfaceIdAllocator(++g_surface_id_namespace));
 224   cc::SurfaceManager* manager = GetSurfaceManager();
 225   DCHECK(manager);
 226   allocator->RegisterSurfaceIdNamespace(manager);
 227   return allocator.Pass();
 228 }
 229
 230 CompositorImpl::CompositorImpl(CompositorClient* client,
 231                                gfx::NativeWindow root_window)
 232     : root_layer_(cc::Layer::Create(Compositor::LayerSettings())),
 233       resource_manager_(&ui_resource_provider_),
 234       surface_id_allocator_(GetSurfaceManager() ? CreateSurfaceIdAllocator()
 235                                                 : nullptr),
 236       has_transparent_background_(false),
 237       device_scale_factor_(1),
 238       window_(NULL),
 239       surface_id_(0),
 240       client_(client),
 241       root_window_(root_window),
 242       did_post_swapbuffers_(false),
 243       ignore_schedule_composite_(false),
 244       needs_composite_(false),
 245       needs_animate_(false),
 246       will_composite_immediately_(false),
 247       composite_on_vsync_trigger_(DO_NOT_COMPOSITE),
 248       pending_swapbuffers_(0U),
 249       num_successive_context_creation_failures_(0),
 250       output_surface_request_pending_(false),
 251       weak_factory_(this) {
 252   DCHECK(client);
 253   DCHECK(root_window);
 254   root_window->AttachCompositor(this);
 255 }
 256
 257 CompositorImpl::~CompositorImpl() {
 258   root_window_->DetachCompositor();
 259   // Clean-up any surface references.
 260   SetSurface(NULL);
 261 }
 262
 263 void CompositorImpl::PostComposite(CompositingTrigger trigger) {
 264   DCHECK(needs_composite_);
 265   DCHECK(trigger == COMPOSITE_IMMEDIATELY || trigger == COMPOSITE_EVENTUALLY);
 266
 267   if (will_composite_immediately_ ||
 268       (trigger == COMPOSITE_EVENTUALLY && WillComposite())) {
 269     // We will already composite soon enough.
 270     DCHECK(WillComposite());
 271     return;
 272   }
 273
 274   if (DidCompositeThisFrame()) {
 275     DCHECK(!WillCompositeThisFrame());
 276     if (composite_on_vsync_trigger_ != COMPOSITE_IMMEDIATELY) {
 277       composite_on_vsync_trigger_ = trigger;
 278       root_window_->RequestVSyncUpdate();
 279     }
 280     DCHECK(WillComposite());
 281     return;
 282   }
 283
 284   base::TimeDelta delay;
 285   if (trigger == COMPOSITE_IMMEDIATELY) {
 286     will_composite_immediately_ = true;
 287     composite_on_vsync_trigger_ = DO_NOT_COMPOSITE;
 288   } else {
 289     DCHECK(!WillComposite());
 290     const base::TimeDelta estimated_composite_time = vsync_period_ / 4;
 291     const base::TimeTicks now = base::TimeTicks::Now();
 292
 293     if (!last_vsync_.is_null() && (now - last_vsync_) < vsync_period_) {
 294       base::TimeTicks next_composite =
 295           last_vsync_ + vsync_period_ - estimated_composite_time;
 296       if (next_composite < now) {
 297         // It's too late, we will reschedule composite as needed on the next
 298         // vsync.
 299         composite_on_vsync_trigger_ = COMPOSITE_EVENTUALLY;
 300         root_window_->RequestVSyncUpdate();
 301         DCHECK(WillComposite());
 302         return;
 303       }
 304
 305       delay = next_composite - now;
 306     }
 307   }
 308   TRACE_EVENT2("cc,benchmark", "CompositorImpl::PostComposite",
 309                "trigger", trigger,
 310                "delay", delay.InMillisecondsF());
 311
 312   DCHECK(composite_on_vsync_trigger_ == DO_NOT_COMPOSITE);
 313   if (current_composite_task_)
 314     current_composite_task_->Cancel();
 315
 316   // Unretained because we cancel the task on shutdown.
 317   current_composite_task_.reset(new base::CancelableClosure(
 318       base::Bind(&CompositorImpl::Composite, base::Unretained(this), trigger)));
 319   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
 320       FROM_HERE, current_composite_task_->callback(), delay);
 321 }
 322
 323 void CompositorImpl::Composite(CompositingTrigger trigger) {
 324   if (trigger == COMPOSITE_IMMEDIATELY)
 325     will_composite_immediately_ = false;
 326
 327   DCHECK(host_);
 328   DCHECK(trigger == COMPOSITE_IMMEDIATELY || trigger == COMPOSITE_EVENTUALLY);
 329   DCHECK(needs_composite_);
 330   DCHECK(!DidCompositeThisFrame());
 331
 332   DCHECK_LE(pending_swapbuffers_, kMaxSwapBuffers);
 333   // Swap Ack accounting is unreliable if the OutputSurface was lost.
 334   // In that case still attempt to composite, which will cause creation of a
 335   // new OutputSurface and reset pending_swapbuffers_.
 336   if (pending_swapbuffers_ == kMaxSwapBuffers &&
 337       !host_->output_surface_lost()) {
 338     TRACE_EVENT0("compositor", "CompositorImpl_SwapLimit");
 339     return;
 340   }
 341
 342   // Reset state before Layout+Composite since that might create more
 343   // requests to Composite that we need to respect.
 344   needs_composite_ = false;
 345
 346   // Only allow compositing once per vsync.
 347   current_composite_task_->Cancel();
 348   DCHECK(DidCompositeThisFrame() && !WillComposite());
 349
 350   // Ignore ScheduleComposite() from layer tree changes during layout and
 351   // animation updates that will already be reflected in the current frame
 352   // we are about to draw.
 353   ignore_schedule_composite_ = true;
 354
 355   const base::TimeTicks frame_time = base::TimeTicks::Now();
 356   if (needs_animate_) {
 357     needs_animate_ = false;
 358     root_window_->Animate(frame_time);
 359   }
 360   ignore_schedule_composite_ = false;
 361
 362   did_post_swapbuffers_ = false;
 363   host_->Composite(frame_time);
 364   if (did_post_swapbuffers_)
 365     pending_swapbuffers_++;
 366
 367   // Need to track vsync to avoid compositing more than once per frame.
 368   root_window_->RequestVSyncUpdate();
 369 }
 370
 371 ui::UIResourceProvider& CompositorImpl::GetUIResourceProvider() {
 372   return ui_resource_provider_;
 373 }
 374
 375 ui::ResourceManager& CompositorImpl::GetResourceManager() {
 376   return resource_manager_;
 377 }
 378
 379 void CompositorImpl::SetRootLayer(scoped_refptr<cc::Layer> root_layer) {
 380   if (subroot_layer_.get()) {
 381     subroot_layer_->RemoveFromParent();
 382     subroot_layer_ = NULL;
 383   }
 384   if (root_layer.get()) {
 385     subroot_layer_ = root_layer;
 386     root_layer_->AddChild(root_layer);
 387   }
 388 }
 389
 390 void CompositorImpl::SetWindowSurface(ANativeWindow* window) {
 391   GpuSurfaceTracker* tracker = GpuSurfaceTracker::Get();
 392
 393   if (window_) {
 394     // Shut down GL context before unregistering surface.
 395     SetVisible(false);
 396     tracker->RemoveSurface(surface_id_);
 397     ANativeWindow_release(window_);
 398     window_ = NULL;
 399     surface_id_ = 0;
 400   }
 401
 402   if (window) {
 403     window_ = window;
 404     ANativeWindow_acquire(window);
 405     surface_id_ = tracker->AddSurfaceForNativeWidget(window);
 406     tracker->SetSurfaceHandle(
 407         surface_id_,
 408         gfx::GLSurfaceHandle(gfx::kNullPluginWindow, gfx::NATIVE_DIRECT));
 409     SetVisible(true);
 410   }
 411 }
 412
 413 void CompositorImpl::SetSurface(jobject surface) {
 414   JNIEnv* env = base::android::AttachCurrentThread();
 415   base::android::ScopedJavaLocalRef<jobject> j_surface(env, surface);
 416
 417   // First, shut down the GL context.
 418   int surface_id = surface_id_;
 419   SetWindowSurface(NULL);
 420   // Then, cleanup any existing surface references.
 421   if (surface_id)
 422     UnregisterViewSurface(surface_id);
 423
 424   // Now, set the new surface if we have one.
 425   ANativeWindow* window = NULL;
 426   if (surface) {
 427     // Note: This ensures that any local references used by
 428     // ANativeWindow_fromSurface are released immediately. This is needed as a
 429     // workaround for https://code.google.com/p/android/issues/detail?id=68174
 430     base::android::ScopedJavaLocalFrame scoped_local_reference_frame(env);
 431     window = ANativeWindow_fromSurface(env, surface);
 432   }
 433   if (window) {
 434     SetWindowSurface(window);
 435     ANativeWindow_release(window);
 436     RegisterViewSurface(surface_id_, j_surface.obj());
 437   }
 438 }
 439
 440 void CompositorImpl::CreateLayerTreeHost() {
 441   DCHECK(!host_);
 442   DCHECK(!WillCompositeThisFrame());
 443   needs_composite_ = false;
 444   pending_swapbuffers_ = 0;
 445   cc::LayerTreeSettings settings;
 446   settings.renderer_settings.refresh_rate = 60.0;
 447   settings.renderer_settings.allow_antialiasing = false;
 448   settings.renderer_settings.highp_threshold_min = 2048;
 449   settings.use_zero_copy = true;
 450
 451   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 452   settings.initial_debug_state.SetRecordRenderingStats(
 453       command_line->HasSwitch(cc::switches::kEnableGpuBenchmarking));
 454   settings.initial_debug_state.show_fps_counter =
 455       command_line->HasSwitch(cc::switches::kUIShowFPSCounter);
 456   // TODO(enne): Update this this compositor to use the scheduler.
 457   settings.single_thread_proxy_scheduler = false;
 458
 459   if (command_line->HasSwitch(
 460           switches::kEnableAndroidCompositorAnimationTimelines))
 461     settings.use_compositor_animation_timelines = true;
 462
 463   cc::LayerTreeHost::InitParams params;
 464   params.client = this;
 465   params.shared_bitmap_manager = HostSharedBitmapManager::current();
 466   params.gpu_memory_buffer_manager = BrowserGpuMemoryBufferManager::current();
 467   params.task_graph_runner = g_task_graph_runner.Pointer();
 468   params.main_task_runner = base::ThreadTaskRunnerHandle::Get();
 469   params.settings = &settings;
 470   host_ = cc::LayerTreeHost::CreateSingleThreaded(this, &params);
 471   host_->SetRootLayer(root_layer_);
 472
 473   host_->SetVisible(true);
 474   host_->SetLayerTreeHostClientReady();
 475   host_->SetViewportSize(size_);
 476   host_->set_has_transparent_background(has_transparent_background_);
 477   host_->SetDeviceScaleFactor(device_scale_factor_);
 478
 479   if (needs_animate_)
 480     host_->SetNeedsAnimate();
 481 }
 482
 483 void CompositorImpl::SetVisible(bool visible) {
 484   TRACE_EVENT1("cc", "CompositorImpl::SetVisible", "visible", visible);
 485   if (!visible) {
 486     DCHECK(host_);
 487     // Look for any layers that were attached to the root for readback
 488     // and are waiting for Composite() to happen.
 489     bool readback_pending = false;
 490     for (size_t i = 0; i < root_layer_->children().size(); ++i) {
 491       if (root_layer_->children()[i]->HasCopyRequest()) {
 492         readback_pending = true;
 493         break;
 494       }
 495     }
 496     if (readback_pending) {
 497       ignore_schedule_composite_ = true;
 498       host_->Composite(base::TimeTicks::Now());
 499       ignore_schedule_composite_ = false;
 500     }
 501     if (WillComposite())
 502       CancelComposite();
 503     ui_resource_provider_.SetLayerTreeHost(NULL);
 504     host_.reset();
 505     establish_gpu_channel_timeout_.Stop();
 506     output_surface_request_pending_ = false;
 507     display_client_.reset();
 508     if (current_composite_task_) {
 509       current_composite_task_->Cancel();
 510       current_composite_task_.reset();
 511     }
 512   } else if (!host_) {
 513     CreateLayerTreeHost();
 514     ui_resource_provider_.SetLayerTreeHost(host_.get());
 515   }
 516 }
 517
 518 void CompositorImpl::setDeviceScaleFactor(float factor) {
 519   device_scale_factor_ = factor;
 520   if (host_)
 521     host_->SetDeviceScaleFactor(factor);
 522 }
 523
 524 void CompositorImpl::SetWindowBounds(const gfx::Size& size) {
 525   if (size_ == size)
 526     return;
 527
 528   size_ = size;
 529   if (host_)
 530     host_->SetViewportSize(size);
 531   if (display_client_)
 532     display_client_->display()->Resize(size);
 533   root_layer_->SetBounds(size);
 534 }
 535
 536 void CompositorImpl::SetHasTransparentBackground(bool flag) {
 537   has_transparent_background_ = flag;
 538   if (host_)
 539     host_->set_has_transparent_background(flag);
 540 }
 541
 542 void CompositorImpl::SetNeedsComposite() {
 543   if (!host_.get())
 544     return;
 545   DCHECK(!needs_composite_ || WillComposite());
 546
 547   needs_composite_ = true;
 548   PostComposite(COMPOSITE_IMMEDIATELY);
 549 }
 550
 551 static scoped_ptr<WebGraphicsContext3DCommandBufferImpl>
 552 CreateGpuProcessViewContext(
 553     const scoped_refptr<GpuChannelHost>& gpu_channel_host,
 554     const blink::WebGraphicsContext3D::Attributes attributes,
 555     int surface_id) {
 556   GURL url("chrome://gpu/Compositor::createContext3D");
 557   static const size_t kBytesPerPixel = 4;
 558   gfx::DeviceDisplayInfo display_info;
 559   size_t full_screen_texture_size_in_bytes =
 560       display_info.GetDisplayHeight() *
 561       display_info.GetDisplayWidth() *
 562       kBytesPerPixel;
 563   WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits limits;
 564   limits.command_buffer_size = 64 * 1024;
 565   limits.start_transfer_buffer_size = 64 * 1024;
 566   limits.min_transfer_buffer_size = 64 * 1024;
 567   limits.max_transfer_buffer_size = std::min(
 568       3 * full_screen_texture_size_in_bytes, kDefaultMaxTransferBufferSize);
 569   limits.mapped_memory_reclaim_limit = 2 * 1024 * 1024;
 570   bool lose_context_when_out_of_memory = true;
 571   return make_scoped_ptr(
 572       new WebGraphicsContext3DCommandBufferImpl(surface_id,
 573                                                 url,
 574                                                 gpu_channel_host.get(),
 575                                                 attributes,
 576                                                 lose_context_when_out_of_memory,
 577                                                 limits,
 578                                                 NULL));
 579 }
 580
 581 void CompositorImpl::Layout() {
 582   ignore_schedule_composite_ = true;
 583   client_->Layout();
 584   ignore_schedule_composite_ = false;
 585 }
 586
 587 void CompositorImpl::OnGpuChannelEstablished() {
 588   establish_gpu_channel_timeout_.Stop();
 589   CreateOutputSurface();
 590 }
 591
 592 void CompositorImpl::OnGpuChannelTimeout() {
 593   LOG(FATAL) << "Timed out waiting for GPU channel.";
 594 }
 595
 596 void CompositorImpl::RequestNewOutputSurface() {
 597   output_surface_request_pending_ = true;
 598
 599 #if defined(ADDRESS_SANITIZER) || defined(THREAD_SANITIZER) || \
 600   defined(SYZYASAN) || defined(CYGPROFILE_INSTRUMENTATION)
 601   const int64 kGpuChannelTimeoutInSeconds = 40;
 602 #else
 603   const int64 kGpuChannelTimeoutInSeconds = 10;
 604 #endif
 605
 606   BrowserGpuChannelHostFactory* factory =
 607       BrowserGpuChannelHostFactory::instance();
 608   if (!factory->GetGpuChannel() || factory->GetGpuChannel()->IsLost()) {
 609     factory->EstablishGpuChannel(
 610         CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE,
 611         base::Bind(&CompositorImpl::OnGpuChannelEstablished,
 612                    weak_factory_.GetWeakPtr()));
 613     establish_gpu_channel_timeout_.Start(
 614         FROM_HERE, base::TimeDelta::FromSeconds(kGpuChannelTimeoutInSeconds),
 615         this, &CompositorImpl::OnGpuChannelTimeout);
 616     return;
 617   }
 618
 619   CreateOutputSurface();
 620 }
 621
 622 void CompositorImpl::DidInitializeOutputSurface() {
 623   num_successive_context_creation_failures_ = 0;
 624   output_surface_request_pending_ = false;
 625 }
 626
 627 void CompositorImpl::DidFailToInitializeOutputSurface() {
 628   LOG(ERROR) << "Failed to init OutputSurface for compositor.";
 629   LOG_IF(FATAL, ++num_successive_context_creation_failures_ >= 2)
 630       << "Too many context creation failures. Giving up... ";
 631   RequestNewOutputSurface();
 632 }
 633
 634 void CompositorImpl::CreateOutputSurface() {
 635   // We might have had a request from a LayerTreeHost that was then
 636   // deleted.
 637   if (!output_surface_request_pending_)
 638     return;
 639
 640   blink::WebGraphicsContext3D::Attributes attrs;
 641   attrs.shareResources = true;
 642   attrs.noAutomaticFlushes = true;
 643   pending_swapbuffers_ = 0;
 644
 645   DCHECK(window_);
 646   DCHECK(surface_id_);
 647
 648   BrowserGpuChannelHostFactory* factory =
 649       BrowserGpuChannelHostFactory::instance();
 650   // This channel might be lost (and even if it isn't right now, it might
 651   // still get marked as lost from the IO thread, at any point in time really).
 652   // But from here on just try and always lead to either
 653   // DidInitializeOutputSurface() or DidFailToInitializeOutputSurface().
 654   scoped_refptr<GpuChannelHost> gpu_channel_host(factory->GetGpuChannel());
 655   scoped_refptr<ContextProviderCommandBuffer> context_provider(
 656       ContextProviderCommandBuffer::Create(
 657           CreateGpuProcessViewContext(gpu_channel_host, attrs, surface_id_),
 658           BROWSER_COMPOSITOR_ONSCREEN_CONTEXT));
 659   DCHECK(context_provider.get());
 660
 661   scoped_ptr<cc::OutputSurface> real_output_surface(
 662       new OutputSurfaceWithoutParent(
 663           this, context_provider,
 664           base::Bind(&CompositorImpl::PopulateGpuCapabilities,
 665                      base::Unretained(this))));
 666
 667   cc::SurfaceManager* manager = GetSurfaceManager();
 668   if (manager) {
 669     display_client_.reset(new cc::OnscreenDisplayClient(
 670         real_output_surface.Pass(), manager, HostSharedBitmapManager::current(),
 671         BrowserGpuMemoryBufferManager::current(),
 672         host_->settings().renderer_settings,
 673         base::ThreadTaskRunnerHandle::Get()));
 674     scoped_ptr<cc::SurfaceDisplayOutputSurface> surface_output_surface(
 675         new cc::SurfaceDisplayOutputSurface(
 676             manager, surface_id_allocator_.get(), context_provider, nullptr));
 677
 678     display_client_->set_surface_output_surface(surface_output_surface.get());
 679     surface_output_surface->set_display_client(display_client_.get());
 680     display_client_->display()->Resize(size_);
 681     host_->SetOutputSurface(surface_output_surface.Pass());
 682   } else {
 683     host_->SetOutputSurface(real_output_surface.Pass());
 684   }
 685 }
 686
 687 void CompositorImpl::PopulateGpuCapabilities(
 688     gpu::Capabilities gpu_capabilities) {
 689   ui_resource_provider_.SetSupportsETC1NonPowerOfTwo(
 690       gpu_capabilities.texture_format_etc1_npot);
 691 }
 692
 693 void CompositorImpl::AddObserver(VSyncObserver* observer) {
 694   observer_list_.AddObserver(observer);
 695 }
 696
 697 void CompositorImpl::RemoveObserver(VSyncObserver* observer) {
 698   observer_list_.RemoveObserver(observer);
 699 }
 700
 701 void CompositorImpl::ScheduleComposite() {
 702   DCHECK(!needs_composite_ || WillComposite());
 703   if (ignore_schedule_composite_)
 704     return;
 705
 706   needs_composite_ = true;
 707   // We currently expect layer tree invalidations at most once per frame
 708   // during normal operation and therefore try to composite immediately
 709   // to minimize latency.
 710   PostComposite(COMPOSITE_IMMEDIATELY);
 711 }
 712
 713 void CompositorImpl::ScheduleAnimation() {
 714   DCHECK(!needs_composite_ || WillComposite());
 715   needs_animate_ = true;
 716
 717   if (needs_composite_)
 718     return;
 719
 720   TRACE_EVENT0("cc", "CompositorImpl::ScheduleAnimation");
 721   needs_composite_ = true;
 722   PostComposite(COMPOSITE_EVENTUALLY);
 723 }
 724
 725 void CompositorImpl::DidPostSwapBuffers() {
 726   TRACE_EVENT0("compositor", "CompositorImpl::DidPostSwapBuffers");
 727   did_post_swapbuffers_ = true;
 728 }
 729
 730 void CompositorImpl::DidCompleteSwapBuffers() {
 731   TRACE_EVENT0("compositor", "CompositorImpl::DidCompleteSwapBuffers");
 732   DCHECK_GT(pending_swapbuffers_, 0U);
 733   if (pending_swapbuffers_-- == kMaxSwapBuffers && needs_composite_)
 734     PostComposite(COMPOSITE_IMMEDIATELY);
 735   client_->OnSwapBuffersCompleted(pending_swapbuffers_);
 736 }
 737
 738 void CompositorImpl::DidAbortSwapBuffers() {
 739   TRACE_EVENT0("compositor", "CompositorImpl::DidAbortSwapBuffers");
 740   // This really gets called only once from
 741   // SingleThreadProxy::DidLoseOutputSurfaceOnImplThread() when the
 742   // context was lost.
 743   ScheduleComposite();
 744   client_->OnSwapBuffersCompleted(0);
 745 }
 746
 747 void CompositorImpl::DidCommit() {
 748   root_window_->OnCompositingDidCommit();
 749 }
 750
 751 void CompositorImpl::AttachLayerForReadback(scoped_refptr<cc::Layer> layer) {
 752   root_layer_->AddChild(layer);
 753 }
 754
 755 void CompositorImpl::RequestCopyOfOutputOnRootLayer(
 756     scoped_ptr<cc::CopyOutputRequest> request) {
 757   root_layer_->RequestCopyOfOutput(request.Pass());
 758 }
 759
 760 void CompositorImpl::OnVSync(base::TimeTicks frame_time,
 761                              base::TimeDelta vsync_period) {
 762   vsync_period_ = vsync_period;
 763   last_vsync_ = frame_time;
 764
 765   if (WillCompositeThisFrame()) {
 766     // We somehow missed the last vsync interval, so reschedule for deadline.
 767     // We cannot schedule immediately, or will get us out-of-phase with new
 768     // renderer frames.
 769     CancelComposite();
 770     composite_on_vsync_trigger_ = COMPOSITE_EVENTUALLY;
 771   } else {
 772     current_composite_task_.reset();
 773   }
 774
 775   DCHECK(!DidCompositeThisFrame() && !WillCompositeThisFrame());
 776   if (composite_on_vsync_trigger_ != DO_NOT_COMPOSITE) {
 777     CompositingTrigger trigger = composite_on_vsync_trigger_;
 778     composite_on_vsync_trigger_ = DO_NOT_COMPOSITE;
 779     PostComposite(trigger);
 780   }
 781
 782   FOR_EACH_OBSERVER(VSyncObserver, observer_list_,
 783                     OnUpdateVSyncParameters(frame_time, vsync_period));
 784 }
 785
 786 void CompositorImpl::SetNeedsAnimate() {
 787   needs_animate_ = true;
 788   if (!host_)
 789     return;
 790
 791   host_->SetNeedsAnimate();
 792 }
 793
 794 }  // namespace content