// Copyright 2011 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "cc/trees/layer_tree_host.h" #include #include #include #include "base/atomic_sequence_num.h" #include "base/bind.h" #include "base/command_line.h" #include "base/debug/trace_event.h" #include "base/message_loop/message_loop.h" #include "base/metrics/histogram.h" #include "base/stl_util.h" #include "base/strings/string_number_conversions.h" #include "cc/animation/animation_registrar.h" #include "cc/animation/layer_animation_controller.h" #include "cc/base/math_util.h" #include "cc/debug/devtools_instrumentation.h" #include "cc/debug/overdraw_metrics.h" #include "cc/debug/rendering_stats_instrumentation.h" #include "cc/input/top_controls_manager.h" #include "cc/layers/heads_up_display_layer.h" #include "cc/layers/heads_up_display_layer_impl.h" #include "cc/layers/layer.h" #include "cc/layers/layer_iterator.h" #include "cc/layers/painted_scrollbar_layer.h" #include "cc/layers/render_surface.h" #include "cc/resources/prioritized_resource_manager.h" #include "cc/resources/ui_resource_request.h" #include "cc/trees/layer_tree_host_client.h" #include "cc/trees/layer_tree_host_common.h" #include "cc/trees/layer_tree_host_impl.h" #include "cc/trees/layer_tree_impl.h" #include "cc/trees/occlusion_tracker.h" #include "cc/trees/single_thread_proxy.h" #include "cc/trees/thread_proxy.h" #include "cc/trees/tree_synchronizer.h" #include "ui/gfx/size_conversions.h" namespace { static base::StaticAtomicSequenceNumber s_layer_tree_host_sequence_number; } namespace cc { RendererCapabilities::RendererCapabilities(ResourceFormat best_texture_format, bool allow_partial_texture_updates, bool using_offscreen_context3d, int max_texture_size, bool using_shared_memory_resources) : best_texture_format(best_texture_format), allow_partial_texture_updates(allow_partial_texture_updates), using_offscreen_context3d(using_offscreen_context3d), max_texture_size(max_texture_size), using_shared_memory_resources(using_shared_memory_resources) {} RendererCapabilities::RendererCapabilities() : best_texture_format(RGBA_8888), allow_partial_texture_updates(false), using_offscreen_context3d(false), max_texture_size(0), using_shared_memory_resources(false) {} RendererCapabilities::~RendererCapabilities() {} scoped_ptr LayerTreeHost::CreateThreaded( LayerTreeHostClient* client, SharedBitmapManager* manager, const LayerTreeSettings& settings, scoped_refptr impl_task_runner) { DCHECK(impl_task_runner); scoped_ptr layer_tree_host( new LayerTreeHost(client, manager, settings)); layer_tree_host->InitializeThreaded(impl_task_runner); return layer_tree_host.Pass(); } scoped_ptr LayerTreeHost::CreateSingleThreaded( LayerTreeHostClient* client, LayerTreeHostSingleThreadClient* single_thread_client, SharedBitmapManager* manager, const LayerTreeSettings& settings) { scoped_ptr layer_tree_host( new LayerTreeHost(client, manager, settings)); layer_tree_host->InitializeSingleThreaded(single_thread_client); return layer_tree_host.Pass(); } LayerTreeHost::LayerTreeHost( LayerTreeHostClient* client, SharedBitmapManager* manager, const LayerTreeSettings& settings) : micro_benchmark_controller_(this), next_ui_resource_id_(1), animating_(false), needs_full_tree_sync_(true), needs_filter_context_(false), client_(client), source_frame_number_(0), rendering_stats_instrumentation_(RenderingStatsInstrumentation::Create()), output_surface_can_be_initialized_(true), output_surface_lost_(true), num_failed_recreate_attempts_(0), settings_(settings), debug_state_(settings.initial_debug_state), overdraw_bottom_height_(0.f), device_scale_factor_(1.f), visible_(true), page_scale_factor_(1.f), min_page_scale_factor_(1.f), max_page_scale_factor_(1.f), trigger_idle_updates_(true), background_color_(SK_ColorWHITE), has_transparent_background_(false), partial_texture_update_requests_(0), in_paint_layer_contents_(false), total_frames_used_for_lcd_text_metrics_(0), id_(s_layer_tree_host_sequence_number.GetNext() + 1), next_commit_forces_redraw_(false), shared_bitmap_manager_(manager) { if (settings_.accelerated_animation_enabled) animation_registrar_ = AnimationRegistrar::Create(); rendering_stats_instrumentation_->set_record_rendering_stats( debug_state_.RecordRenderingStats()); } void LayerTreeHost::InitializeThreaded( scoped_refptr impl_task_runner) { InitializeProxy(ThreadProxy::Create(this, impl_task_runner)); } void LayerTreeHost::InitializeSingleThreaded( LayerTreeHostSingleThreadClient* single_thread_client) { InitializeProxy(SingleThreadProxy::Create(this, single_thread_client)); } void LayerTreeHost::InitializeForTesting(scoped_ptr proxy_for_testing) { InitializeProxy(proxy_for_testing.Pass()); } void LayerTreeHost::InitializeProxy(scoped_ptr proxy) { TRACE_EVENT0("cc", "LayerTreeHost::InitializeForReal"); proxy_ = proxy.Pass(); proxy_->Start(); } LayerTreeHost::~LayerTreeHost() { TRACE_EVENT0("cc", "LayerTreeHost::~LayerTreeHost"); overhang_ui_resource_.reset(); if (root_layer_.get()) root_layer_->SetLayerTreeHost(NULL); if (proxy_) { DCHECK(proxy_->IsMainThread()); proxy_->Stop(); } // We must clear any pointers into the layer tree prior to destroying it. RegisterViewportLayers(NULL, NULL, NULL); if (root_layer_.get()) { // The layer tree must be destroyed before the layer tree host. We've // made a contract with our animation controllers that the registrar // will outlive them, and we must make good. root_layer_ = NULL; } } void LayerTreeHost::SetLayerTreeHostClientReady() { proxy_->SetLayerTreeHostClientReady(); } static void LayerTreeHostOnOutputSurfaceCreatedCallback(Layer* layer) { layer->OnOutputSurfaceCreated(); } LayerTreeHost::CreateResult LayerTreeHost::OnCreateAndInitializeOutputSurfaceAttempted(bool success) { TRACE_EVENT1("cc", "LayerTreeHost::OnCreateAndInitializeOutputSurfaceAttempted", "success", success); DCHECK(output_surface_lost_); if (success) { output_surface_lost_ = false; if (!contents_texture_manager_ && !settings_.impl_side_painting) { contents_texture_manager_ = PrioritizedResourceManager::Create(proxy_.get()); surface_memory_placeholder_ = contents_texture_manager_->CreateTexture(gfx::Size(), RGBA_8888); } if (root_layer()) { LayerTreeHostCommon::CallFunctionForSubtree( root_layer(), base::Bind(&LayerTreeHostOnOutputSurfaceCreatedCallback)); } client_->DidInitializeOutputSurface(true); return CreateSucceeded; } // Failure path. client_->DidFailToInitializeOutputSurface(); // Tolerate a certain number of recreation failures to work around races // in the output-surface-lost machinery. ++num_failed_recreate_attempts_; if (num_failed_recreate_attempts_ >= 5) { // We have tried too many times to recreate the output surface. Tell the // host to fall back to software rendering. output_surface_can_be_initialized_ = false; client_->DidInitializeOutputSurface(false); return CreateFailedAndGaveUp; } return CreateFailedButTryAgain; } void LayerTreeHost::DeleteContentsTexturesOnImplThread( ResourceProvider* resource_provider) { DCHECK(proxy_->IsImplThread()); if (contents_texture_manager_) contents_texture_manager_->ClearAllMemory(resource_provider); } void LayerTreeHost::AcquireLayerTextures() { DCHECK(proxy_->IsMainThread()); proxy_->AcquireLayerTextures(); } void LayerTreeHost::DidBeginMainFrame() { client_->DidBeginMainFrame(); } void LayerTreeHost::UpdateClientAnimations(base::TimeTicks frame_begin_time) { animating_ = true; client_->Animate(frame_begin_time); animating_ = false; } void LayerTreeHost::DidStopFlinging() { proxy_->MainThreadHasStoppedFlinging(); } void LayerTreeHost::Layout() { client_->Layout(); } void LayerTreeHost::BeginCommitOnImplThread(LayerTreeHostImpl* host_impl) { DCHECK(proxy_->IsImplThread()); TRACE_EVENT0("cc", "LayerTreeHost::CommitTo"); } // This function commits the LayerTreeHost to an impl tree. When modifying // this function, keep in mind that the function *runs* on the impl thread! Any // code that is logically a main thread operation, e.g. deletion of a Layer, // should be delayed until the LayerTreeHost::CommitComplete, which will run // after the commit, but on the main thread. void LayerTreeHost::FinishCommitOnImplThread(LayerTreeHostImpl* host_impl) { DCHECK(proxy_->IsImplThread()); // If there are linked evicted backings, these backings' resources may be put // into the impl tree, so we can't draw yet. Determine this before clearing // all evicted backings. bool new_impl_tree_has_no_evicted_resources = false; if (contents_texture_manager_) { new_impl_tree_has_no_evicted_resources = !contents_texture_manager_->LinkedEvictedBackingsExist(); // If the memory limit has been increased since this now-finishing // commit began, and the extra now-available memory would have been used, // then request another commit. if (contents_texture_manager_->MaxMemoryLimitBytes() < host_impl->memory_allocation_limit_bytes() && contents_texture_manager_->MaxMemoryLimitBytes() < contents_texture_manager_->MaxMemoryNeededBytes()) { host_impl->SetNeedsCommit(); } host_impl->set_max_memory_needed_bytes( contents_texture_manager_->MaxMemoryNeededBytes()); contents_texture_manager_->UpdateBackingsState( host_impl->resource_provider()); } // In impl-side painting, synchronize to the pending tree so that it has // time to raster before being displayed. If no pending tree is needed, // synchronization can happen directly to the active tree and // unlinked contents resources can be reclaimed immediately. LayerTreeImpl* sync_tree; if (settings_.impl_side_painting) { // Commits should not occur while there is already a pending tree. DCHECK(!host_impl->pending_tree()); host_impl->CreatePendingTree(); sync_tree = host_impl->pending_tree(); if (next_commit_forces_redraw_) sync_tree->ForceRedrawNextActivation(); } else { if (next_commit_forces_redraw_) host_impl->SetFullRootLayerDamage(); contents_texture_manager_->ReduceMemory(host_impl->resource_provider()); sync_tree = host_impl->active_tree(); } next_commit_forces_redraw_ = false; sync_tree->set_source_frame_number(source_frame_number()); if (needs_full_tree_sync_) sync_tree->SetRootLayer(TreeSynchronizer::SynchronizeTrees( root_layer(), sync_tree->DetachLayerTree(), sync_tree)); { TRACE_EVENT0("cc", "LayerTreeHost::PushProperties"); TreeSynchronizer::PushProperties(root_layer(), sync_tree->root_layer()); } sync_tree->set_needs_full_tree_sync(needs_full_tree_sync_); needs_full_tree_sync_ = false; if (hud_layer_.get()) { LayerImpl* hud_impl = LayerTreeHostCommon::FindLayerInSubtree( sync_tree->root_layer(), hud_layer_->id()); sync_tree->set_hud_layer(static_cast(hud_impl)); } else { sync_tree->set_hud_layer(NULL); } sync_tree->set_background_color(background_color_); sync_tree->set_has_transparent_background(has_transparent_background_); if (page_scale_layer_ && inner_viewport_scroll_layer_) { sync_tree->SetViewportLayersFromIds( page_scale_layer_->id(), inner_viewport_scroll_layer_->id(), outer_viewport_scroll_layer_ ? outer_viewport_scroll_layer_->id() : Layer::INVALID_ID); } else { sync_tree->ClearViewportLayers(); } float page_scale_delta, sent_page_scale_delta; if (settings_.impl_side_painting) { // Update the delta from the active tree, which may have // adjusted its delta prior to the pending tree being created. // This code is equivalent to that in LayerTreeImpl::SetPageScaleDelta. DCHECK_EQ(1.f, sync_tree->sent_page_scale_delta()); page_scale_delta = host_impl->active_tree()->page_scale_delta(); sent_page_scale_delta = host_impl->active_tree()->sent_page_scale_delta(); } else { page_scale_delta = sync_tree->page_scale_delta(); sent_page_scale_delta = sync_tree->sent_page_scale_delta(); sync_tree->set_sent_page_scale_delta(1.f); } sync_tree->SetPageScaleFactorAndLimits(page_scale_factor_, min_page_scale_factor_, max_page_scale_factor_); sync_tree->SetPageScaleDelta(page_scale_delta / sent_page_scale_delta); sync_tree->PassSwapPromises(&swap_promise_list_); host_impl->SetViewportSize(device_viewport_size_); host_impl->SetOverdrawBottomHeight(overdraw_bottom_height_); host_impl->SetDeviceScaleFactor(device_scale_factor_); host_impl->SetDebugState(debug_state_); if (pending_page_scale_animation_) { host_impl->StartPageScaleAnimation( pending_page_scale_animation_->target_offset, pending_page_scale_animation_->use_anchor, pending_page_scale_animation_->scale, pending_page_scale_animation_->duration); pending_page_scale_animation_.reset(); } if (!ui_resource_request_queue_.empty()) { sync_tree->set_ui_resource_request_queue(ui_resource_request_queue_); ui_resource_request_queue_.clear(); // Process any ui resource requests in the queue. For impl-side-painting, // the queue is processed in LayerTreeHostImpl::ActivatePendingTree. if (!settings_.impl_side_painting) sync_tree->ProcessUIResourceRequestQueue(); } if (overhang_ui_resource_) { host_impl->SetOverhangUIResource( overhang_ui_resource_->id(), GetUIResourceSize(overhang_ui_resource_->id())); } DCHECK(!sync_tree->ViewportSizeInvalid()); if (new_impl_tree_has_no_evicted_resources) { if (sync_tree->ContentsTexturesPurged()) sync_tree->ResetContentsTexturesPurged(); } if (!settings_.impl_side_painting) { // If we're not in impl-side painting, the tree is immediately // considered active. sync_tree->DidBecomeActive(); devtools_instrumentation::DidActivateLayerTree(id_, source_frame_number_); } micro_benchmark_controller_.ScheduleImplBenchmarks(host_impl); source_frame_number_++; } void LayerTreeHost::WillCommit() { client_->WillCommit(); } void LayerTreeHost::UpdateHudLayer() { if (debug_state_.ShowHudInfo()) { if (!hud_layer_.get()) hud_layer_ = HeadsUpDisplayLayer::Create(); if (root_layer_.get() && !hud_layer_->parent()) root_layer_->AddChild(hud_layer_); } else if (hud_layer_.get()) { hud_layer_->RemoveFromParent(); hud_layer_ = NULL; } } void LayerTreeHost::CommitComplete() { client_->DidCommit(); } scoped_ptr LayerTreeHost::CreateOutputSurface() { return client_->CreateOutputSurface(num_failed_recreate_attempts_ >= 4); } scoped_ptr LayerTreeHost::CreateLayerTreeHostImpl( LayerTreeHostImplClient* client) { DCHECK(proxy_->IsImplThread()); scoped_ptr host_impl = LayerTreeHostImpl::Create(settings_, client, proxy_.get(), rendering_stats_instrumentation_.get(), shared_bitmap_manager_, id_); shared_bitmap_manager_ = NULL; if (settings_.calculate_top_controls_position && host_impl->top_controls_manager()) { top_controls_manager_weak_ptr_ = host_impl->top_controls_manager()->AsWeakPtr(); } input_handler_weak_ptr_ = host_impl->AsWeakPtr(); return host_impl.Pass(); } void LayerTreeHost::DidLoseOutputSurface() { TRACE_EVENT0("cc", "LayerTreeHost::DidLoseOutputSurface"); DCHECK(proxy_->IsMainThread()); if (output_surface_lost_) return; num_failed_recreate_attempts_ = 0; output_surface_lost_ = true; SetNeedsCommit(); } bool LayerTreeHost::CompositeAndReadback( void* pixels, const gfx::Rect& rect_in_device_viewport) { trigger_idle_updates_ = false; bool ret = proxy_->CompositeAndReadback(pixels, rect_in_device_viewport); trigger_idle_updates_ = true; return ret; } void LayerTreeHost::FinishAllRendering() { proxy_->FinishAllRendering(); } void LayerTreeHost::SetDeferCommits(bool defer_commits) { proxy_->SetDeferCommits(defer_commits); } void LayerTreeHost::DidDeferCommit() {} void LayerTreeHost::SetNeedsDisplayOnAllLayers() { std::stack layer_stack; layer_stack.push(root_layer()); while (!layer_stack.empty()) { Layer* current_layer = layer_stack.top(); layer_stack.pop(); current_layer->SetNeedsDisplay(); for (unsigned int i = 0; i < current_layer->children().size(); i++) { layer_stack.push(current_layer->child_at(i)); } } } const RendererCapabilities& LayerTreeHost::GetRendererCapabilities() const { return proxy_->GetRendererCapabilities(); } void LayerTreeHost::SetNeedsAnimate() { proxy_->SetNeedsAnimate(); NotifySwapPromiseMonitorsOfSetNeedsCommit(); } void LayerTreeHost::SetNeedsUpdateLayers() { proxy_->SetNeedsUpdateLayers(); NotifySwapPromiseMonitorsOfSetNeedsCommit(); } void LayerTreeHost::SetNeedsCommit() { if (!prepaint_callback_.IsCancelled()) { TRACE_EVENT_INSTANT0("cc", "LayerTreeHost::SetNeedsCommit::cancel prepaint", TRACE_EVENT_SCOPE_THREAD); prepaint_callback_.Cancel(); } proxy_->SetNeedsCommit(); NotifySwapPromiseMonitorsOfSetNeedsCommit(); } void LayerTreeHost::SetNeedsFullTreeSync() { needs_full_tree_sync_ = true; SetNeedsCommit(); } void LayerTreeHost::SetNeedsRedraw() { SetNeedsRedrawRect(gfx::Rect(device_viewport_size_)); } void LayerTreeHost::SetNeedsRedrawRect(const gfx::Rect& damage_rect) { proxy_->SetNeedsRedraw(damage_rect); } bool LayerTreeHost::CommitRequested() const { return proxy_->CommitRequested(); } bool LayerTreeHost::BeginMainFrameRequested() const { return proxy_->BeginMainFrameRequested(); } void LayerTreeHost::SetNextCommitWaitsForActivation() { proxy_->SetNextCommitWaitsForActivation(); } void LayerTreeHost::SetNextCommitForcesRedraw() { next_commit_forces_redraw_ = true; } void LayerTreeHost::SetAnimationEvents(scoped_ptr events, base::Time wall_clock_time) { DCHECK(proxy_->IsMainThread()); for (size_t event_index = 0; event_index < events->size(); ++event_index) { int event_layer_id = (*events)[event_index].layer_id; // Use the map of all controllers, not just active ones, since non-active // controllers may still receive events for impl-only animations. const AnimationRegistrar::AnimationControllerMap& animation_controllers = animation_registrar_->all_animation_controllers(); AnimationRegistrar::AnimationControllerMap::const_iterator iter = animation_controllers.find(event_layer_id); if (iter != animation_controllers.end()) { switch ((*events)[event_index].type) { case AnimationEvent::Started: (*iter).second->NotifyAnimationStarted((*events)[event_index], wall_clock_time.ToDoubleT()); break; case AnimationEvent::Finished: (*iter).second->NotifyAnimationFinished((*events)[event_index], wall_clock_time.ToDoubleT()); break; case AnimationEvent::Aborted: (*iter).second->NotifyAnimationAborted((*events)[event_index]); break; case AnimationEvent::PropertyUpdate: (*iter).second->NotifyAnimationPropertyUpdate((*events)[event_index]); break; } } } } void LayerTreeHost::SetRootLayer(scoped_refptr root_layer) { if (root_layer_.get() == root_layer.get()) return; if (root_layer_.get()) root_layer_->SetLayerTreeHost(NULL); root_layer_ = root_layer; if (root_layer_.get()) { DCHECK(!root_layer_->parent()); root_layer_->SetLayerTreeHost(this); } if (hud_layer_.get()) hud_layer_->RemoveFromParent(); SetNeedsFullTreeSync(); } void LayerTreeHost::SetDebugState(const LayerTreeDebugState& debug_state) { LayerTreeDebugState new_debug_state = LayerTreeDebugState::Unite(settings_.initial_debug_state, debug_state); if (LayerTreeDebugState::Equal(debug_state_, new_debug_state)) return; debug_state_ = new_debug_state; rendering_stats_instrumentation_->set_record_rendering_stats( debug_state_.RecordRenderingStats()); SetNeedsCommit(); } void LayerTreeHost::SetViewportSize(const gfx::Size& device_viewport_size) { if (device_viewport_size == device_viewport_size_) return; device_viewport_size_ = device_viewport_size; SetNeedsCommit(); } void LayerTreeHost::SetOverdrawBottomHeight(float overdraw_bottom_height) { if (overdraw_bottom_height_ == overdraw_bottom_height) return; overdraw_bottom_height_ = overdraw_bottom_height; SetNeedsCommit(); } void LayerTreeHost::ApplyPageScaleDeltaFromImplSide(float page_scale_delta) { DCHECK(CommitRequested()); page_scale_factor_ *= page_scale_delta; } void LayerTreeHost::SetPageScaleFactorAndLimits(float page_scale_factor, float min_page_scale_factor, float max_page_scale_factor) { if (page_scale_factor == page_scale_factor_ && min_page_scale_factor == min_page_scale_factor_ && max_page_scale_factor == max_page_scale_factor_) return; page_scale_factor_ = page_scale_factor; min_page_scale_factor_ = min_page_scale_factor; max_page_scale_factor_ = max_page_scale_factor; SetNeedsCommit(); } void LayerTreeHost::SetOverhangBitmap(const SkBitmap& bitmap) { DCHECK(bitmap.width() && bitmap.height()); DCHECK_EQ(bitmap.bytesPerPixel(), 4); SkBitmap bitmap_copy; if (bitmap.isImmutable()) { bitmap_copy = bitmap; } else { bitmap.copyTo(&bitmap_copy); bitmap_copy.setImmutable(); } UIResourceBitmap overhang_bitmap(bitmap_copy); overhang_bitmap.SetWrapMode(UIResourceBitmap::REPEAT); overhang_ui_resource_ = ScopedUIResource::Create(this, overhang_bitmap); } void LayerTreeHost::SetVisible(bool visible) { if (visible_ == visible) return; visible_ = visible; if (!visible) ReduceMemoryUsage(); proxy_->SetVisible(visible); } void LayerTreeHost::StartPageScaleAnimation(const gfx::Vector2d& target_offset, bool use_anchor, float scale, base::TimeDelta duration) { pending_page_scale_animation_.reset(new PendingPageScaleAnimation); pending_page_scale_animation_->target_offset = target_offset; pending_page_scale_animation_->use_anchor = use_anchor; pending_page_scale_animation_->scale = scale; pending_page_scale_animation_->duration = duration; SetNeedsCommit(); } void LayerTreeHost::NotifyInputThrottledUntilCommit() { proxy_->NotifyInputThrottledUntilCommit(); } void LayerTreeHost::Composite(base::TimeTicks frame_begin_time) { if (!proxy_->HasImplThread()) static_cast(proxy_.get())->CompositeImmediately( frame_begin_time); else SetNeedsCommit(); } bool LayerTreeHost::InitializeOutputSurfaceIfNeeded() { if (!output_surface_can_be_initialized_) return false; if (output_surface_lost_) proxy_->CreateAndInitializeOutputSurface(); return !output_surface_lost_; } bool LayerTreeHost::UpdateLayers(ResourceUpdateQueue* queue) { DCHECK(!output_surface_lost_); if (!root_layer()) return false; DCHECK(!root_layer()->parent()); bool result = UpdateLayers(root_layer(), queue); micro_benchmark_controller_.DidUpdateLayers(); return result || next_commit_forces_redraw_; } static Layer* FindFirstScrollableLayer(Layer* layer) { if (!layer) return NULL; if (layer->scrollable()) return layer; for (size_t i = 0; i < layer->children().size(); ++i) { Layer* found = FindFirstScrollableLayer(layer->children()[i].get()); if (found) return found; } return NULL; } void LayerTreeHost::CalculateLCDTextMetricsCallback(Layer* layer) { if (!layer->SupportsLCDText()) return; lcd_text_metrics_.total_num_cc_layers++; if (layer->draw_properties().can_use_lcd_text) { lcd_text_metrics_.total_num_cc_layers_can_use_lcd_text++; if (layer->contents_opaque()) lcd_text_metrics_.total_num_cc_layers_will_use_lcd_text++; } } bool LayerTreeHost::UsingSharedMemoryResources() { return GetRendererCapabilities().using_shared_memory_resources; } bool LayerTreeHost::UpdateLayers(Layer* root_layer, ResourceUpdateQueue* queue) { TRACE_EVENT1("cc", "LayerTreeHost::UpdateLayers", "source_frame_number", source_frame_number()); RenderSurfaceLayerList update_list; { UpdateHudLayer(); Layer* root_scroll = FindFirstScrollableLayer(root_layer); Layer* page_scale_layer = page_scale_layer_; if (!page_scale_layer && root_scroll) page_scale_layer = root_scroll->parent(); if (hud_layer_) { hud_layer_->PrepareForCalculateDrawProperties( device_viewport_size(), device_scale_factor_); } TRACE_EVENT0("cc", "LayerTreeHost::UpdateLayers::CalcDrawProps"); bool can_render_to_separate_surface = true; LayerTreeHostCommon::CalcDrawPropsMainInputs inputs( root_layer, device_viewport_size(), gfx::Transform(), device_scale_factor_, page_scale_factor_, page_scale_layer, GetRendererCapabilities().max_texture_size, settings_.can_use_lcd_text, can_render_to_separate_surface, settings_.layer_transforms_should_scale_layer_contents, &update_list); LayerTreeHostCommon::CalculateDrawProperties(&inputs); if (total_frames_used_for_lcd_text_metrics_ <= kTotalFramesToUseForLCDTextMetrics) { LayerTreeHostCommon::CallFunctionForSubtree( root_layer, base::Bind(&LayerTreeHost::CalculateLCDTextMetricsCallback, base::Unretained(this))); total_frames_used_for_lcd_text_metrics_++; } if (total_frames_used_for_lcd_text_metrics_ == kTotalFramesToUseForLCDTextMetrics) { total_frames_used_for_lcd_text_metrics_++; UMA_HISTOGRAM_PERCENTAGE( "Renderer4.LCDText.PercentageOfCandidateLayers", lcd_text_metrics_.total_num_cc_layers_can_use_lcd_text * 100.0 / lcd_text_metrics_.total_num_cc_layers); UMA_HISTOGRAM_PERCENTAGE( "Renderer4.LCDText.PercentageOfAALayers", lcd_text_metrics_.total_num_cc_layers_will_use_lcd_text * 100.0 / lcd_text_metrics_.total_num_cc_layers_can_use_lcd_text); } } // Reset partial texture update requests. partial_texture_update_requests_ = 0; bool did_paint_content = false; bool need_more_updates = false; PaintLayerContents( update_list, queue, &did_paint_content, &need_more_updates); if (trigger_idle_updates_ && need_more_updates) { TRACE_EVENT0("cc", "LayerTreeHost::UpdateLayers::posting prepaint task"); prepaint_callback_.Reset(base::Bind(&LayerTreeHost::TriggerPrepaint, base::Unretained(this))); static base::TimeDelta prepaint_delay = base::TimeDelta::FromMilliseconds(100); base::MessageLoop::current()->PostDelayedTask( FROM_HERE, prepaint_callback_.callback(), prepaint_delay); } return did_paint_content; } void LayerTreeHost::TriggerPrepaint() { prepaint_callback_.Cancel(); TRACE_EVENT0("cc", "LayerTreeHost::TriggerPrepaint"); SetNeedsCommit(); } static void LayerTreeHostReduceMemoryCallback(Layer* layer) { layer->ReduceMemoryUsage(); } void LayerTreeHost::ReduceMemoryUsage() { if (!root_layer()) return; LayerTreeHostCommon::CallFunctionForSubtree( root_layer(), base::Bind(&LayerTreeHostReduceMemoryCallback)); } void LayerTreeHost::SetPrioritiesForSurfaces(size_t surface_memory_bytes) { DCHECK(surface_memory_placeholder_); // Surfaces have a place holder for their memory since they are managed // independantly but should still be tracked and reduce other memory usage. surface_memory_placeholder_->SetTextureManager( contents_texture_manager_.get()); surface_memory_placeholder_->set_request_priority( PriorityCalculator::RenderSurfacePriority()); surface_memory_placeholder_->SetToSelfManagedMemoryPlaceholder( surface_memory_bytes); } void LayerTreeHost::SetPrioritiesForLayers( const RenderSurfaceLayerList& update_list) { PriorityCalculator calculator; typedef LayerIterator LayerIteratorType; LayerIteratorType end = LayerIteratorType::End(&update_list); for (LayerIteratorType it = LayerIteratorType::Begin(&update_list); it != end; ++it) { if (it.represents_itself()) { it->SetTexturePriorities(calculator); } else if (it.represents_target_render_surface()) { if (it->mask_layer()) it->mask_layer()->SetTexturePriorities(calculator); if (it->replica_layer() && it->replica_layer()->mask_layer()) it->replica_layer()->mask_layer()->SetTexturePriorities(calculator); } } } void LayerTreeHost::PrioritizeTextures( const RenderSurfaceLayerList& render_surface_layer_list, OverdrawMetrics* metrics) { if (!contents_texture_manager_) return; contents_texture_manager_->ClearPriorities(); size_t memory_for_render_surfaces_metric = CalculateMemoryForRenderSurfaces(render_surface_layer_list); SetPrioritiesForLayers(render_surface_layer_list); SetPrioritiesForSurfaces(memory_for_render_surfaces_metric); metrics->DidUseContentsTextureMemoryBytes( contents_texture_manager_->MemoryAboveCutoffBytes()); metrics->DidUseRenderSurfaceTextureMemoryBytes( memory_for_render_surfaces_metric); contents_texture_manager_->PrioritizeTextures(); } size_t LayerTreeHost::CalculateMemoryForRenderSurfaces( const RenderSurfaceLayerList& update_list) { size_t readback_bytes = 0; size_t max_background_texture_bytes = 0; size_t contents_texture_bytes = 0; // Start iteration at 1 to skip the root surface as it does not have a texture // cost. for (size_t i = 1; i < update_list.size(); ++i) { Layer* render_surface_layer = update_list.at(i); RenderSurface* render_surface = render_surface_layer->render_surface(); size_t bytes = Resource::MemorySizeBytes(render_surface->content_rect().size(), RGBA_8888); contents_texture_bytes += bytes; if (render_surface_layer->background_filters().IsEmpty()) continue; if (bytes > max_background_texture_bytes) max_background_texture_bytes = bytes; if (!readback_bytes) { readback_bytes = Resource::MemorySizeBytes(device_viewport_size_, RGBA_8888); } } return readback_bytes + max_background_texture_bytes + contents_texture_bytes; } void LayerTreeHost::PaintMasksForRenderSurface(Layer* render_surface_layer, ResourceUpdateQueue* queue, bool* did_paint_content, bool* need_more_updates) { // Note: Masks and replicas only exist for layers that own render surfaces. If // we reach this point in code, we already know that at least something will // be drawn into this render surface, so the mask and replica should be // painted. Layer* mask_layer = render_surface_layer->mask_layer(); if (mask_layer) { *did_paint_content |= mask_layer->Update(queue, NULL); *need_more_updates |= mask_layer->NeedMoreUpdates(); } Layer* replica_mask_layer = render_surface_layer->replica_layer() ? render_surface_layer->replica_layer()->mask_layer() : NULL; if (replica_mask_layer) { *did_paint_content |= replica_mask_layer->Update(queue, NULL); *need_more_updates |= replica_mask_layer->NeedMoreUpdates(); } } void LayerTreeHost::PaintLayerContents( const RenderSurfaceLayerList& render_surface_layer_list, ResourceUpdateQueue* queue, bool* did_paint_content, bool* need_more_updates) { bool record_metrics_for_frame = settings_.show_overdraw_in_tracing && base::debug::TraceLog::GetInstance() && base::debug::TraceLog::GetInstance()->IsEnabled(); OcclusionTracker occlusion_tracker( root_layer_->render_surface()->content_rect(), record_metrics_for_frame); occlusion_tracker.set_minimum_tracking_size( settings_.minimum_occlusion_tracking_size); PrioritizeTextures(render_surface_layer_list, occlusion_tracker.overdraw_metrics()); in_paint_layer_contents_ = true; // Iterates front-to-back to allow for testing occlusion and performing // culling during the tree walk. typedef LayerIterator LayerIteratorType; LayerIteratorType end = LayerIteratorType::End(&render_surface_layer_list); for (LayerIteratorType it = LayerIteratorType::Begin(&render_surface_layer_list); it != end; ++it) { occlusion_tracker.EnterLayer(it); if (it.represents_target_render_surface()) { PaintMasksForRenderSurface( *it, queue, did_paint_content, need_more_updates); } else if (it.represents_itself() && it->DrawsContent()) { DCHECK(!it->paint_properties().bounds.IsEmpty()); *did_paint_content |= it->Update(queue, &occlusion_tracker); *need_more_updates |= it->NeedMoreUpdates(); } occlusion_tracker.LeaveLayer(it); } in_paint_layer_contents_ = false; occlusion_tracker.overdraw_metrics()->RecordMetrics(this); } void LayerTreeHost::ApplyScrollAndScale(const ScrollAndScaleSet& info) { if (!root_layer_.get()) return; gfx::Vector2d inner_viewport_scroll_delta; gfx::Vector2d outer_viewport_scroll_delta; for (size_t i = 0; i < info.scrolls.size(); ++i) { Layer* layer = LayerTreeHostCommon::FindLayerInSubtree(root_layer_.get(), info.scrolls[i].layer_id); if (!layer) continue; if (layer == outer_viewport_scroll_layer_.get()) { outer_viewport_scroll_delta += info.scrolls[i].scroll_delta; } else if (layer == inner_viewport_scroll_layer_.get()) { inner_viewport_scroll_delta += info.scrolls[i].scroll_delta; } else { layer->SetScrollOffsetFromImplSide(layer->scroll_offset() + info.scrolls[i].scroll_delta); } } if (!inner_viewport_scroll_delta.IsZero() || !outer_viewport_scroll_delta.IsZero() || info.page_scale_delta != 1.f) { // SetScrollOffsetFromImplSide above could have destroyed the tree, // so re-get this layer before doing anything to it. // Preemptively apply the scroll offset and scale delta here before sending // it to the client. If the client comes back and sets it to the same // value, then the layer can early out without needing a full commit. DCHECK(inner_viewport_scroll_layer_); // We should always have this. inner_viewport_scroll_layer_->SetScrollOffsetFromImplSide( inner_viewport_scroll_layer_->scroll_offset() + inner_viewport_scroll_delta); if (outer_viewport_scroll_layer_) { outer_viewport_scroll_layer_->SetScrollOffsetFromImplSide( outer_viewport_scroll_layer_->scroll_offset() + outer_viewport_scroll_delta); } ApplyPageScaleDeltaFromImplSide(info.page_scale_delta); client_->ApplyScrollAndScale( inner_viewport_scroll_delta + outer_viewport_scroll_delta, info.page_scale_delta); } } gfx::Vector2d LayerTreeHost::DistributeScrollOffsetToViewports( const gfx::Vector2d offset, Layer* layer) { DCHECK(layer); if (layer != outer_viewport_scroll_layer_.get()) return offset; gfx::Vector2d inner_viewport_offset = inner_viewport_scroll_layer_->scroll_offset(); gfx::Vector2d outer_viewport_offset = outer_viewport_scroll_layer_->scroll_offset(); if (offset == inner_viewport_offset + outer_viewport_offset) { // In this case, nothing should change, so we just return to the outer // viewport the offset is already has. return outer_viewport_offset; } // In the spirit of document-scrolls-first, we always want any change to // go to the outer viewport first. gfx::Vector2d max_outer_viewport_scroll_offset = outer_viewport_scroll_layer_->MaxScrollOffset(); gfx::Vector2d max_inner_viewport_scroll_offset = inner_viewport_scroll_layer_->MaxScrollOffset(); // TODO(bokan): This trips on zoom-out due to how Blink orders scale-scroll. // Disabled until that's sorted out: crbug.com/336574 // gfx::Vector2d total_max_scroll_offset = // max_outer_viewport_scroll_offset + max_inner_viewport_scroll_offset; // DCHECK(total_max_scroll_offset.x() >= offset.x() && // total_max_scroll_offset.y() >= offset.y()); outer_viewport_offset = offset - inner_viewport_offset; outer_viewport_offset.SetToMin(max_outer_viewport_scroll_offset); outer_viewport_offset.SetToMax(gfx::Vector2d()); inner_viewport_offset = offset - outer_viewport_offset; inner_viewport_offset.SetToMin(max_inner_viewport_scroll_offset); inner_viewport_offset.SetToMax(gfx::Vector2d()); inner_viewport_scroll_layer_->SetScrollOffset(inner_viewport_offset); return outer_viewport_offset; } void LayerTreeHost::StartRateLimiter() { if (animating_) return; if (!rate_limit_timer_.IsRunning()) { rate_limit_timer_.Start(FROM_HERE, base::TimeDelta(), this, &LayerTreeHost::RateLimit); } } void LayerTreeHost::StopRateLimiter() { rate_limit_timer_.Stop(); } void LayerTreeHost::RateLimit() { // Force a no-op command on the compositor context, so that any ratelimiting // commands will wait for the compositing context, and therefore for the // SwapBuffers. proxy_->ForceSerializeOnSwapBuffers(); client_->RateLimitSharedMainThreadContext(); } bool LayerTreeHost::AlwaysUsePartialTextureUpdates() { if (!proxy_->GetRendererCapabilities().allow_partial_texture_updates) return false; return !proxy_->HasImplThread(); } size_t LayerTreeHost::MaxPartialTextureUpdates() const { size_t max_partial_texture_updates = 0; if (proxy_->GetRendererCapabilities().allow_partial_texture_updates && !settings_.impl_side_painting) { max_partial_texture_updates = std::min(settings_.max_partial_texture_updates, proxy_->MaxPartialTextureUpdates()); } return max_partial_texture_updates; } bool LayerTreeHost::RequestPartialTextureUpdate() { if (partial_texture_update_requests_ >= MaxPartialTextureUpdates()) return false; partial_texture_update_requests_++; return true; } void LayerTreeHost::SetDeviceScaleFactor(float device_scale_factor) { if (device_scale_factor == device_scale_factor_) return; device_scale_factor_ = device_scale_factor; SetNeedsCommit(); } void LayerTreeHost::UpdateTopControlsState(TopControlsState constraints, TopControlsState current, bool animate) { if (!settings_.calculate_top_controls_position) return; // Top controls are only used in threaded mode. proxy_->ImplThreadTaskRunner()->PostTask( FROM_HERE, base::Bind(&TopControlsManager::UpdateTopControlsState, top_controls_manager_weak_ptr_, constraints, current, animate)); } scoped_ptr LayerTreeHost::AsValue() const { scoped_ptr state(new base::DictionaryValue()); state->Set("proxy", proxy_->AsValue().release()); return state.PassAs(); } void LayerTreeHost::AnimateLayers(base::TimeTicks time) { if (!settings_.accelerated_animation_enabled || animation_registrar_->active_animation_controllers().empty()) return; TRACE_EVENT0("cc", "LayerTreeHost::AnimateLayers"); double monotonic_time = (time - base::TimeTicks()).InSecondsF(); AnimationRegistrar::AnimationControllerMap copy = animation_registrar_->active_animation_controllers(); for (AnimationRegistrar::AnimationControllerMap::iterator iter = copy.begin(); iter != copy.end(); ++iter) { (*iter).second->Animate(monotonic_time); bool start_ready_animations = true; (*iter).second->UpdateState(start_ready_animations, NULL); } } UIResourceId LayerTreeHost::CreateUIResource(UIResourceClient* client) { DCHECK(client); UIResourceId next_id = next_ui_resource_id_++; DCHECK(ui_resource_client_map_.find(next_id) == ui_resource_client_map_.end()); bool resource_lost = false; UIResourceRequest request(UIResourceRequest::UIResourceCreate, next_id, client->GetBitmap(next_id, resource_lost)); ui_resource_request_queue_.push_back(request); UIResourceClientData data; data.client = client; data.size = request.GetBitmap().GetSize(); ui_resource_client_map_[request.GetId()] = data; return request.GetId(); } // Deletes a UI resource. May safely be called more than once. void LayerTreeHost::DeleteUIResource(UIResourceId uid) { UIResourceClientMap::iterator iter = ui_resource_client_map_.find(uid); if (iter == ui_resource_client_map_.end()) return; UIResourceRequest request(UIResourceRequest::UIResourceDelete, uid); ui_resource_request_queue_.push_back(request); ui_resource_client_map_.erase(iter); } void LayerTreeHost::RecreateUIResources() { for (UIResourceClientMap::iterator iter = ui_resource_client_map_.begin(); iter != ui_resource_client_map_.end(); ++iter) { UIResourceId uid = iter->first; const UIResourceClientData& data = iter->second; bool resource_lost = true; UIResourceRequest request(UIResourceRequest::UIResourceCreate, uid, data.client->GetBitmap(uid, resource_lost)); ui_resource_request_queue_.push_back(request); } } // Returns the size of a resource given its id. gfx::Size LayerTreeHost::GetUIResourceSize(UIResourceId uid) const { UIResourceClientMap::const_iterator iter = ui_resource_client_map_.find(uid); if (iter == ui_resource_client_map_.end()) return gfx::Size(); const UIResourceClientData& data = iter->second; return data.size; } void LayerTreeHost::RegisterViewportLayers( scoped_refptr page_scale_layer, scoped_refptr inner_viewport_scroll_layer, scoped_refptr outer_viewport_scroll_layer) { page_scale_layer_ = page_scale_layer; inner_viewport_scroll_layer_ = inner_viewport_scroll_layer; outer_viewport_scroll_layer_ = outer_viewport_scroll_layer; } bool LayerTreeHost::ScheduleMicroBenchmark( const std::string& benchmark_name, scoped_ptr value, const MicroBenchmark::DoneCallback& callback) { return micro_benchmark_controller_.ScheduleRun( benchmark_name, value.Pass(), callback); } void LayerTreeHost::InsertSwapPromiseMonitor(SwapPromiseMonitor* monitor) { swap_promise_monitor_.insert(monitor); } void LayerTreeHost::RemoveSwapPromiseMonitor(SwapPromiseMonitor* monitor) { swap_promise_monitor_.erase(monitor); } void LayerTreeHost::NotifySwapPromiseMonitorsOfSetNeedsCommit() { std::set::iterator it = swap_promise_monitor_.begin(); for (; it != swap_promise_monitor_.end(); it++) (*it)->OnSetNeedsCommitOnMain(); } void LayerTreeHost::QueueSwapPromise(scoped_ptr swap_promise) { DCHECK(swap_promise); if (swap_promise_list_.size() > kMaxQueuedSwapPromiseNumber) BreakSwapPromises(SwapPromise::SWAP_PROMISE_LIST_OVERFLOW); swap_promise_list_.push_back(swap_promise.Pass()); } void LayerTreeHost::BreakSwapPromises(SwapPromise::DidNotSwapReason reason) { for (size_t i = 0; i < swap_promise_list_.size(); i++) swap_promise_list_[i]->DidNotSwap(reason); swap_promise_list_.clear(); } } // namespace cc