// 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_impl.h" #include #include #include #include #include #include #include #include #include "base/auto_reset.h" #include "base/bind.h" #include "base/containers/small_map.h" #include "base/json/json_writer.h" #include "base/memory/ptr_util.h" #include "base/metrics/histogram.h" #include "base/numerics/safe_conversions.h" #include "base/stl_util.h" #include "base/strings/stringprintf.h" #include "base/trace_event/trace_event_argument.h" #include "cc/base/histograms.h" #include "cc/base/math_util.h" #include "cc/debug/benchmark_instrumentation.h" #include "cc/debug/debug_rect_history.h" #include "cc/debug/devtools_instrumentation.h" #include "cc/debug/frame_rate_counter.h" #include "cc/debug/frame_viewer_instrumentation.h" #include "cc/debug/rendering_stats_instrumentation.h" #include "cc/debug/traced_value.h" #include "cc/input/browser_controls_offset_manager.h" #include "cc/input/main_thread_scrolling_reason.h" #include "cc/input/page_scale_animation.h" #include "cc/input/scroll_elasticity_helper.h" #include "cc/input/scroll_state.h" #include "cc/input/scrollbar_animation_controller.h" #include "cc/layers/append_quads_data.h" #include "cc/layers/heads_up_display_layer_impl.h" #include "cc/layers/layer_impl.h" #include "cc/layers/layer_iterator.h" #include "cc/layers/painted_scrollbar_layer_impl.h" #include "cc/layers/render_surface_impl.h" #include "cc/layers/scrollbar_layer_impl_base.h" #include "cc/layers/surface_layer_impl.h" #include "cc/layers/viewport.h" #include "cc/output/compositor_frame.h" #include "cc/output/compositor_frame_metadata.h" #include "cc/output/compositor_frame_sink.h" #include "cc/output/copy_output_request.h" #include "cc/quads/render_pass_draw_quad.h" #include "cc/quads/shared_quad_state.h" #include "cc/quads/solid_color_draw_quad.h" #include "cc/quads/texture_draw_quad.h" #include "cc/raster/bitmap_raster_buffer_provider.h" #include "cc/raster/gpu_raster_buffer_provider.h" #include "cc/raster/one_copy_raster_buffer_provider.h" #include "cc/raster/raster_buffer_provider.h" #include "cc/raster/synchronous_task_graph_runner.h" #include "cc/raster/zero_copy_raster_buffer_provider.h" #include "cc/resources/memory_history.h" #include "cc/resources/resource_pool.h" #include "cc/resources/ui_resource_bitmap.h" #include "cc/scheduler/delay_based_time_source.h" #include "cc/tiles/eviction_tile_priority_queue.h" #include "cc/tiles/gpu_image_decode_controller.h" #include "cc/tiles/picture_layer_tiling.h" #include "cc/tiles/raster_tile_priority_queue.h" #include "cc/tiles/software_image_decode_controller.h" #include "cc/trees/damage_tracker.h" #include "cc/trees/draw_property_utils.h" #include "cc/trees/latency_info_swap_promise_monitor.h" #include "cc/trees/layer_tree_host_common.h" #include "cc/trees/layer_tree_impl.h" #include "cc/trees/mutator_host.h" #include "cc/trees/scroll_node.h" #include "cc/trees/single_thread_proxy.h" #include "cc/trees/tree_synchronizer.h" #include "gpu/GLES2/gl2extchromium.h" #include "gpu/command_buffer/client/context_support.h" #include "gpu/command_buffer/client/gles2_interface.h" #include "ui/gfx/geometry/point_conversions.h" #include "ui/gfx/geometry/rect_conversions.h" #include "ui/gfx/geometry/scroll_offset.h" #include "ui/gfx/geometry/size_conversions.h" #include "ui/gfx/geometry/vector2d_conversions.h" namespace cc { namespace { // Small helper class that saves the current viewport location as the user sees // it and resets to the same location. class ViewportAnchor { public: ViewportAnchor(LayerImpl* inner_scroll, LayerImpl* outer_scroll) : inner_(inner_scroll), outer_(outer_scroll) { viewport_in_content_coordinates_ = inner_->CurrentScrollOffset(); if (outer_) viewport_in_content_coordinates_ += outer_->CurrentScrollOffset(); } void ResetViewportToAnchoredPosition() { DCHECK(outer_); inner_->ClampScrollToMaxScrollOffset(); outer_->ClampScrollToMaxScrollOffset(); gfx::ScrollOffset viewport_location = inner_->CurrentScrollOffset() + outer_->CurrentScrollOffset(); gfx::Vector2dF delta = viewport_in_content_coordinates_.DeltaFrom(viewport_location); delta = inner_->ScrollBy(delta); outer_->ScrollBy(delta); } private: LayerImpl* inner_; LayerImpl* outer_; gfx::ScrollOffset viewport_in_content_coordinates_; }; void DidVisibilityChange(LayerTreeHostImpl* id, bool visible) { if (visible) { TRACE_EVENT_ASYNC_BEGIN1("cc", "LayerTreeHostImpl::SetVisible", id, "LayerTreeHostImpl", id); return; } TRACE_EVENT_ASYNC_END0("cc", "LayerTreeHostImpl::SetVisible", id); } bool IsWheelBasedScroll(InputHandler::ScrollInputType type) { return type == InputHandler::WHEEL; } enum ScrollThread { MAIN_THREAD, CC_THREAD }; void RecordCompositorSlowScrollMetric(InputHandler::ScrollInputType type, ScrollThread scroll_thread) { bool scroll_on_main_thread = (scroll_thread == MAIN_THREAD); if (IsWheelBasedScroll(type)) { UMA_HISTOGRAM_BOOLEAN("Renderer4.CompositorWheelScrollUpdateThread", scroll_on_main_thread); } else { UMA_HISTOGRAM_BOOLEAN("Renderer4.CompositorTouchScrollUpdateThread", scroll_on_main_thread); } } } // namespace DEFINE_SCOPED_UMA_HISTOGRAM_TIMER(PendingTreeDurationHistogramTimer, "Scheduling.%s.PendingTreeDuration"); LayerTreeHostImpl::FrameData::FrameData() : render_surface_layer_list(nullptr), has_no_damage(false), may_contain_video(false) {} LayerTreeHostImpl::FrameData::~FrameData() {} std::unique_ptr LayerTreeHostImpl::Create( const LayerTreeSettings& settings, LayerTreeHostImplClient* client, TaskRunnerProvider* task_runner_provider, RenderingStatsInstrumentation* rendering_stats_instrumentation, TaskGraphRunner* task_graph_runner, std::unique_ptr mutator_host, int id) { return base::WrapUnique(new LayerTreeHostImpl( settings, client, task_runner_provider, rendering_stats_instrumentation, task_graph_runner, std::move(mutator_host), id)); } LayerTreeHostImpl::LayerTreeHostImpl( const LayerTreeSettings& settings, LayerTreeHostImplClient* client, TaskRunnerProvider* task_runner_provider, RenderingStatsInstrumentation* rendering_stats_instrumentation, TaskGraphRunner* task_graph_runner, std::unique_ptr mutator_host, int id) : client_(client), task_runner_provider_(task_runner_provider), current_begin_frame_tracker_(BEGINFRAMETRACKER_FROM_HERE), compositor_frame_sink_(nullptr), need_update_gpu_rasterization_status_(false), content_is_suitable_for_gpu_rasterization_(true), has_gpu_rasterization_trigger_(false), use_gpu_rasterization_(false), use_msaa_(false), gpu_rasterization_status_(GpuRasterizationStatus::OFF_DEVICE), input_handler_client_(NULL), did_lock_scrolling_layer_(false), wheel_scrolling_(false), scroll_affects_scroll_handler_(false), scroll_layer_id_mouse_currently_over_(Layer::INVALID_ID), tile_priorities_dirty_(false), settings_(settings), visible_(false), cached_managed_memory_policy_(settings.gpu_memory_policy), is_synchronous_single_threaded_(!task_runner_provider->HasImplThread() && !settings.single_thread_proxy_scheduler), // Must be initialized after is_synchronous_single_threaded_ and // task_runner_provider_. tile_manager_(this, GetTaskRunner(), is_synchronous_single_threaded_ ? std::numeric_limits::max() : settings.scheduled_raster_task_limit, settings.use_partial_raster), pinch_gesture_active_(false), pinch_gesture_end_should_clear_scrolling_layer_(false), fps_counter_( FrameRateCounter::Create(task_runner_provider_->HasImplThread())), memory_history_(MemoryHistory::Create()), debug_rect_history_(DebugRectHistory::Create()), max_memory_needed_bytes_(0), resourceless_software_draw_(false), mutator_host_(std::move(mutator_host)), rendering_stats_instrumentation_(rendering_stats_instrumentation), micro_benchmark_controller_(this), task_graph_runner_(task_graph_runner), id_(id), requires_high_res_to_draw_(false), is_likely_to_require_a_draw_(false), has_valid_compositor_frame_sink_(false), mutator_(nullptr) { DCHECK(mutator_host_); mutator_host_->SetMutatorHostClient(this); DCHECK(task_runner_provider_->IsImplThread()); DidVisibilityChange(this, visible_); SetDebugState(settings.initial_debug_state); // LTHI always has an active tree. active_tree_ = base::MakeUnique( this, new SyncedProperty, new SyncedBrowserControls, new SyncedElasticOverscroll); active_tree_->property_trees()->is_active = true; viewport_ = Viewport::Create(this); TRACE_EVENT_OBJECT_CREATED_WITH_ID(TRACE_DISABLED_BY_DEFAULT("cc.debug"), "cc::LayerTreeHostImpl", id_); browser_controls_offset_manager_ = BrowserControlsOffsetManager::Create( this, settings.top_controls_show_threshold, settings.top_controls_hide_threshold); } LayerTreeHostImpl::~LayerTreeHostImpl() { DCHECK(task_runner_provider_->IsImplThread()); TRACE_EVENT0("cc", "LayerTreeHostImpl::~LayerTreeHostImpl()"); TRACE_EVENT_OBJECT_DELETED_WITH_ID(TRACE_DISABLED_BY_DEFAULT("cc.debug"), "cc::LayerTreeHostImpl", id_); // It is released before shutdown. DCHECK(!compositor_frame_sink_); DCHECK(!resource_provider_); DCHECK(!resource_pool_); DCHECK(!single_thread_synchronous_task_graph_runner_); DCHECK(!image_decode_controller_); if (input_handler_client_) { input_handler_client_->WillShutdown(); input_handler_client_ = NULL; } if (scroll_elasticity_helper_) scroll_elasticity_helper_.reset(); // The layer trees must be destroyed before the layer tree host. if (recycle_tree_) recycle_tree_->Shutdown(); if (pending_tree_) pending_tree_->Shutdown(); active_tree_->Shutdown(); recycle_tree_ = nullptr; pending_tree_ = nullptr; active_tree_ = nullptr; mutator_host_->ClearMutators(); mutator_host_->SetMutatorHostClient(nullptr); } void LayerTreeHostImpl::BeginMainFrameAborted( CommitEarlyOutReason reason, std::vector> swap_promises) { // If the begin frame data was handled, then scroll and scale set was applied // by the main thread, so the active tree needs to be updated as if these sent // values were applied and committed. if (CommitEarlyOutHandledCommit(reason)) { active_tree_->ApplySentScrollAndScaleDeltasFromAbortedCommit(); if (pending_tree_) { pending_tree_->AppendSwapPromises(std::move(swap_promises)); } else { for (const auto& swap_promise : swap_promises) swap_promise->DidNotSwap(SwapPromise::COMMIT_NO_UPDATE); } } } void LayerTreeHostImpl::BeginCommit() { TRACE_EVENT0("cc", "LayerTreeHostImpl::BeginCommit"); // Ensure all textures are returned so partial texture updates can happen // during the commit. // TODO(ericrk): We should not need to ForceReclaimResources when using // Impl-side-painting as it doesn't upload during commits. However, // Display::Draw currently relies on resource being reclaimed to block drawing // between BeginCommit / Swap. See crbug.com/489515. if (compositor_frame_sink_) compositor_frame_sink_->ForceReclaimResources(); if (!CommitToActiveTree()) CreatePendingTree(); } void LayerTreeHostImpl::CommitComplete() { TRACE_EVENT0("cc", "LayerTreeHostImpl::CommitComplete"); if (CommitToActiveTree()) { // We have to activate animations here or "IsActive()" is true on the layers // but the animations aren't activated yet so they get ignored by // UpdateDrawProperties. ActivateAnimations(); } // Start animations before UpdateDrawProperties and PrepareTiles, as they can // change the results. When doing commit to the active tree, this must happen // after ActivateAnimations() in order for this ticking to be propogated to // layers on the active tree. if (CommitToActiveTree()) Animate(); else AnimatePendingTreeAfterCommit(); // LayerTreeHost may have changed the GPU rasterization flags state, which // may require an update of the tree resources. UpdateTreeResourcesForGpuRasterizationIfNeeded(); sync_tree()->set_needs_update_draw_properties(); // We need an update immediately post-commit to have the opportunity to create // tilings. Because invalidations may be coming from the main thread, it's // safe to do an update for lcd text at this point and see if lcd text needs // to be disabled on any layers. bool update_lcd_text = true; sync_tree()->UpdateDrawProperties(update_lcd_text); // Start working on newly created tiles immediately if needed. // TODO(vmpstr): Investigate always having PrepareTiles issue // NotifyReadyToActivate, instead of handling it here. bool did_prepare_tiles = PrepareTiles(); if (!did_prepare_tiles) { NotifyReadyToActivate(); // Ensure we get ReadyToDraw signal even when PrepareTiles not run. This // is important for SingleThreadProxy and impl-side painting case. For // STP, we commit to active tree and RequiresHighResToDraw, and set // Scheduler to wait for ReadyToDraw signal to avoid Checkerboard. if (CommitToActiveTree()) NotifyReadyToDraw(); } micro_benchmark_controller_.DidCompleteCommit(); } bool LayerTreeHostImpl::CanDraw() const { // Note: If you are changing this function or any other function that might // affect the result of CanDraw, make sure to call // client_->OnCanDrawStateChanged in the proper places and update the // NotifyIfCanDrawChanged test. if (!compositor_frame_sink_) { TRACE_EVENT_INSTANT0("cc", "LayerTreeHostImpl::CanDraw no CompositorFrameSink", TRACE_EVENT_SCOPE_THREAD); return false; } // TODO(boliu): Make draws without layers work and move this below // |resourceless_software_draw_| check. Tracked in crbug.com/264967. if (active_tree_->LayerListIsEmpty()) { TRACE_EVENT_INSTANT0("cc", "LayerTreeHostImpl::CanDraw no root layer", TRACE_EVENT_SCOPE_THREAD); return false; } if (resourceless_software_draw_) return true; if (DrawViewportSize().IsEmpty()) { TRACE_EVENT_INSTANT0("cc", "LayerTreeHostImpl::CanDraw empty viewport", TRACE_EVENT_SCOPE_THREAD); return false; } if (active_tree_->ViewportSizeInvalid()) { TRACE_EVENT_INSTANT0( "cc", "LayerTreeHostImpl::CanDraw viewport size recently changed", TRACE_EVENT_SCOPE_THREAD); return false; } if (EvictedUIResourcesExist()) { TRACE_EVENT_INSTANT0( "cc", "LayerTreeHostImpl::CanDraw UI resources evicted not recreated", TRACE_EVENT_SCOPE_THREAD); return false; } return true; } void LayerTreeHostImpl::AnimatePendingTreeAfterCommit() { AnimateInternal(false); } void LayerTreeHostImpl::Animate() { AnimateInternal(true); } void LayerTreeHostImpl::AnimateInternal(bool active_tree) { DCHECK(task_runner_provider_->IsImplThread()); base::TimeTicks monotonic_time = CurrentBeginFrameArgs().frame_time; // mithro(TODO): Enable these checks. // DCHECK(!current_begin_frame_tracker_.HasFinished()); // DCHECK(monotonic_time == current_begin_frame_tracker_.Current().frame_time) // << "Called animate with unknown frame time!?"; bool did_animate = false; if (input_handler_client_) { // This animates fling scrolls. But on Android WebView root flings are // controlled by the application, so the compositor does not animate them. bool ignore_fling = settings_.ignore_root_layer_flings && IsCurrentlyScrollingViewport(); if (!ignore_fling) { // This does not set did_animate, because if the InputHandlerClient // changes anything it will be through the InputHandler interface which // does SetNeedsRedraw. input_handler_client_->Animate(monotonic_time); } } did_animate |= AnimatePageScale(monotonic_time); did_animate |= AnimateLayers(monotonic_time); did_animate |= AnimateScrollbars(monotonic_time); did_animate |= AnimateBrowserControls(monotonic_time); if (active_tree) { did_animate |= Mutate(monotonic_time); // Animating stuff can change the root scroll offset, so inform the // synchronous input handler. UpdateRootLayerStateForSynchronousInputHandler(); if (did_animate) { // If the tree changed, then we want to draw at the end of the current // frame. SetNeedsRedraw(); } } } bool LayerTreeHostImpl::Mutate(base::TimeTicks monotonic_time) { if (!mutator_) return false; TRACE_EVENT0("compositor-worker", "LayerTreeHostImpl::Mutate"); if (mutator_->Mutate(monotonic_time, active_tree())) client_->SetNeedsOneBeginImplFrameOnImplThread(); return true; } void LayerTreeHostImpl::SetNeedsMutate() { TRACE_EVENT0("compositor-worker", "LayerTreeHostImpl::SetNeedsMutate"); client_->SetNeedsOneBeginImplFrameOnImplThread(); } bool LayerTreeHostImpl::PrepareTiles() { if (!tile_priorities_dirty_) return false; client_->WillPrepareTiles(); bool did_prepare_tiles = tile_manager_.PrepareTiles(global_tile_state_); if (did_prepare_tiles) tile_priorities_dirty_ = false; client_->DidPrepareTiles(); return did_prepare_tiles; } void LayerTreeHostImpl::StartPageScaleAnimation( const gfx::Vector2d& target_offset, bool anchor_point, float page_scale, base::TimeDelta duration) { if (!InnerViewportScrollLayer()) return; gfx::ScrollOffset scroll_total = active_tree_->TotalScrollOffset(); gfx::SizeF scaled_scrollable_size = active_tree_->ScrollableSize(); gfx::SizeF viewport_size = gfx::SizeF(active_tree_->InnerViewportContainerLayer()->bounds()); // TODO(miletus) : Pass in ScrollOffset. page_scale_animation_ = PageScaleAnimation::Create(ScrollOffsetToVector2dF(scroll_total), active_tree_->current_page_scale_factor(), viewport_size, scaled_scrollable_size); if (anchor_point) { gfx::Vector2dF anchor(target_offset); page_scale_animation_->ZoomWithAnchor(anchor, page_scale, duration.InSecondsF()); } else { gfx::Vector2dF scaled_target_offset = target_offset; page_scale_animation_->ZoomTo(scaled_target_offset, page_scale, duration.InSecondsF()); } SetNeedsOneBeginImplFrame(); client_->SetNeedsCommitOnImplThread(); client_->RenewTreePriority(); } void LayerTreeHostImpl::SetNeedsAnimateInput() { DCHECK(!IsCurrentlyScrollingViewport() || !settings_.ignore_root_layer_flings); SetNeedsOneBeginImplFrame(); } bool LayerTreeHostImpl::IsCurrentlyScrollingViewport() const { LayerImpl* scrolling_layer = CurrentlyScrollingLayer(); if (!scrolling_layer) return false; DCHECK(viewport()); return scrolling_layer == viewport()->MainScrollLayer(); } bool LayerTreeHostImpl::IsCurrentlyScrollingLayerAt( const gfx::Point& viewport_point, InputHandler::ScrollInputType type) const { LayerImpl* scrolling_layer_impl = CurrentlyScrollingLayer(); if (!scrolling_layer_impl) return false; gfx::PointF device_viewport_point = gfx::ScalePoint( gfx::PointF(viewport_point), active_tree_->device_scale_factor()); LayerImpl* layer_impl = active_tree_->FindLayerThatIsHitByPoint(device_viewport_point); bool scroll_on_main_thread = false; uint32_t main_thread_scrolling_reasons; LayerImpl* test_layer_impl = FindScrollLayerForDeviceViewportPoint( device_viewport_point, type, layer_impl, &scroll_on_main_thread, &main_thread_scrolling_reasons); if (!test_layer_impl) return false; if (scrolling_layer_impl == test_layer_impl) return true; // For active scrolling state treat the inner/outer viewports interchangeably. if (scrolling_layer_impl == InnerViewportScrollLayer() || scrolling_layer_impl == OuterViewportScrollLayer()) { return test_layer_impl == viewport()->MainScrollLayer(); } return false; } EventListenerProperties LayerTreeHostImpl::GetEventListenerProperties( EventListenerClass event_class) const { return active_tree_->event_listener_properties(event_class); } bool LayerTreeHostImpl::DoTouchEventsBlockScrollAt( const gfx::Point& viewport_point) { gfx::PointF device_viewport_point = gfx::ScalePoint( gfx::PointF(viewport_point), active_tree_->device_scale_factor()); // Now determine if there are actually any handlers at that point. // TODO(rbyers): Consider also honoring touch-action (crbug.com/347272). LayerImpl* layer_impl = active_tree_->FindLayerThatIsHitByPointInTouchHandlerRegion( device_viewport_point); return layer_impl != NULL; } std::unique_ptr LayerTreeHostImpl::CreateLatencyInfoSwapPromiseMonitor( ui::LatencyInfo* latency) { return base::WrapUnique( new LatencyInfoSwapPromiseMonitor(latency, NULL, this)); } ScrollElasticityHelper* LayerTreeHostImpl::CreateScrollElasticityHelper() { DCHECK(!scroll_elasticity_helper_); if (settings_.enable_elastic_overscroll) { scroll_elasticity_helper_.reset( ScrollElasticityHelper::CreateForLayerTreeHostImpl(this)); } return scroll_elasticity_helper_.get(); } bool LayerTreeHostImpl::GetScrollOffsetForLayer(int layer_id, gfx::ScrollOffset* offset) { LayerImpl* layer = active_tree()->FindActiveTreeLayerById(layer_id); if (!layer) return false; *offset = layer->CurrentScrollOffset(); return true; } bool LayerTreeHostImpl::ScrollLayerTo(int layer_id, const gfx::ScrollOffset& offset) { LayerImpl* layer = active_tree()->FindActiveTreeLayerById(layer_id); if (!layer) return false; layer->ScrollBy( ScrollOffsetToVector2dF(offset - layer->CurrentScrollOffset())); return true; } void LayerTreeHostImpl::QueueSwapPromiseForMainThreadScrollUpdate( std::unique_ptr swap_promise) { swap_promises_for_main_thread_scroll_update_.push_back( std::move(swap_promise)); } void LayerTreeHostImpl::TrackDamageForAllSurfaces( const LayerImplList& render_surface_layer_list) { // For now, we use damage tracking to compute a global scissor. To do this, we // must compute all damage tracking before drawing anything, so that we know // the root damage rect. The root damage rect is then used to scissor each // surface. size_t render_surface_layer_list_size = render_surface_layer_list.size(); for (size_t i = 0; i < render_surface_layer_list_size; ++i) { size_t surface_index = render_surface_layer_list_size - 1 - i; LayerImpl* render_surface_layer = render_surface_layer_list[surface_index]; RenderSurfaceImpl* render_surface = render_surface_layer->render_surface(); DCHECK(render_surface); render_surface->damage_tracker()->UpdateDamageTrackingState( render_surface->layer_list(), render_surface, render_surface->SurfacePropertyChangedOnlyFromDescendant(), render_surface->content_rect(), render_surface->MaskLayer(), render_surface->Filters()); } } void LayerTreeHostImpl::FrameData::AsValueInto( base::trace_event::TracedValue* value) const { value->SetBoolean("has_no_damage", has_no_damage); // Quad data can be quite large, so only dump render passes if we select // cc.debug.quads. bool quads_enabled; TRACE_EVENT_CATEGORY_GROUP_ENABLED( TRACE_DISABLED_BY_DEFAULT("cc.debug.quads"), &quads_enabled); if (quads_enabled) { value->BeginArray("render_passes"); for (size_t i = 0; i < render_passes.size(); ++i) { value->BeginDictionary(); render_passes[i]->AsValueInto(value); value->EndDictionary(); } value->EndArray(); } } void LayerTreeHostImpl::FrameData::AppendRenderPass( std::unique_ptr render_pass) { render_passes.push_back(std::move(render_pass)); } DrawMode LayerTreeHostImpl::GetDrawMode() const { if (resourceless_software_draw_) { return DRAW_MODE_RESOURCELESS_SOFTWARE; } else if (compositor_frame_sink_->context_provider()) { return DRAW_MODE_HARDWARE; } else { return DRAW_MODE_SOFTWARE; } } static void AppendQuadsForRenderSurfaceLayer( RenderPass* target_render_pass, LayerImpl* layer, const RenderPass* contributing_render_pass, AppendQuadsData* append_quads_data) { RenderSurfaceImpl* surface = layer->render_surface(); const gfx::Transform& draw_transform = surface->draw_transform(); const Occlusion& occlusion = surface->occlusion_in_content_space(); SkColor debug_border_color = surface->GetDebugBorderColor(); float debug_border_width = surface->GetDebugBorderWidth(); LayerImpl* mask_layer = surface->MaskLayer(); surface->AppendQuads(target_render_pass, draw_transform, occlusion, debug_border_color, debug_border_width, mask_layer, append_quads_data, contributing_render_pass->id); } static void AppendQuadsToFillScreen(const gfx::Rect& root_scroll_layer_rect, RenderPass* target_render_pass, RenderSurfaceImpl* root_render_surface, SkColor screen_background_color, const Region& fill_region) { if (!root_render_surface || !SkColorGetA(screen_background_color)) return; if (fill_region.IsEmpty()) return; // Manually create the quad state for the gutter quads, as the root layer // doesn't have any bounds and so can't generate this itself. // TODO(danakj): Make the gutter quads generated by the solid color layer // (make it smarter about generating quads to fill unoccluded areas). gfx::Rect root_target_rect = root_render_surface->content_rect(); float opacity = 1.f; int sorting_context_id = 0; SharedQuadState* shared_quad_state = target_render_pass->CreateAndAppendSharedQuadState(); shared_quad_state->SetAll(gfx::Transform(), root_target_rect.size(), root_target_rect, root_target_rect, false, opacity, SkXfermode::kSrcOver_Mode, sorting_context_id); for (Region::Iterator fill_rects(fill_region); fill_rects.has_rect(); fill_rects.next()) { gfx::Rect screen_space_rect = fill_rects.rect(); gfx::Rect visible_screen_space_rect = screen_space_rect; // Skip the quad culler and just append the quads directly to avoid // occlusion checks. SolidColorDrawQuad* quad = target_render_pass->CreateAndAppendDrawQuad(); quad->SetNew(shared_quad_state, screen_space_rect, visible_screen_space_rect, screen_background_color, false); } } static RenderPass* FindRenderPassById(const RenderPassList& list, RenderPassId id) { auto it = std::find_if( list.begin(), list.end(), [id](const std::unique_ptr& p) { return p->id == id; }); return it == list.end() ? nullptr : it->get(); } DrawResult LayerTreeHostImpl::CalculateRenderPasses(FrameData* frame) { DCHECK(frame->render_passes.empty()); DCHECK(CanDraw()); DCHECK(!active_tree_->LayerListIsEmpty()); TrackDamageForAllSurfaces(*frame->render_surface_layer_list); // If the root render surface has no visible damage, then don't generate a // frame at all. RenderSurfaceImpl* root_surface = active_tree_->RootRenderSurface(); bool root_surface_has_no_visible_damage = !root_surface->damage_tracker()->current_damage_rect().Intersects( root_surface->content_rect()); bool root_surface_has_contributing_layers = !root_surface->layer_list().empty(); bool hud_wants_to_draw_ = active_tree_->hud_layer() && active_tree_->hud_layer()->IsAnimatingHUDContents(); bool resources_must_be_resent = compositor_frame_sink_->capabilities().can_force_reclaim_resources; if (root_surface_has_contributing_layers && root_surface_has_no_visible_damage && !active_tree_->property_trees()->effect_tree.HasCopyRequests() && !resources_must_be_resent && !hud_wants_to_draw_) { TRACE_EVENT0("cc", "LayerTreeHostImpl::CalculateRenderPasses::EmptyDamageRect"); frame->has_no_damage = true; DCHECK(!resourceless_software_draw_); return DRAW_SUCCESS; } TRACE_EVENT_BEGIN2( "cc", "LayerTreeHostImpl::CalculateRenderPasses", "render_surface_layer_list.size()", static_cast(frame->render_surface_layer_list->size()), "RequiresHighResToDraw", RequiresHighResToDraw()); // Create the render passes in dependency order. size_t render_surface_layer_list_size = frame->render_surface_layer_list->size(); for (size_t i = 0; i < render_surface_layer_list_size; ++i) { size_t surface_index = render_surface_layer_list_size - 1 - i; LayerImpl* render_surface_layer = (*frame->render_surface_layer_list)[surface_index]; RenderSurfaceImpl* render_surface = render_surface_layer->render_surface(); bool should_draw_into_render_pass = active_tree_->IsRootLayer(render_surface_layer) || render_surface->contributes_to_drawn_surface() || render_surface->HasCopyRequest(); if (should_draw_into_render_pass) render_surface->AppendRenderPasses(frame); } // Damage rects for non-root passes aren't meaningful, so set them to be // equal to the output rect. for (size_t i = 0; i + 1 < frame->render_passes.size(); ++i) { RenderPass* pass = frame->render_passes[i].get(); pass->damage_rect = pass->output_rect; } // When we are displaying the HUD, change the root damage rect to cover the // entire root surface. This will disable partial-swap/scissor optimizations // that would prevent the HUD from updating, since the HUD does not cause // damage itself, to prevent it from messing with damage visualizations. Since // damage visualizations are done off the LayerImpls and RenderSurfaceImpls, // changing the RenderPass does not affect them. if (active_tree_->hud_layer()) { RenderPass* root_pass = frame->render_passes.back().get(); root_pass->damage_rect = root_pass->output_rect; } // Grab this region here before iterating layers. Taking copy requests from // the layers while constructing the render passes will dirty the render // surface layer list and this unoccluded region, flipping the dirty bit to // true, and making us able to query for it without doing // UpdateDrawProperties again. The value inside the Region is not actually // changed until UpdateDrawProperties happens, so a reference to it is safe. const Region& unoccluded_screen_space_region = active_tree_->UnoccludedScreenSpaceRegion(); // Typically when we are missing a texture and use a checkerboard quad, we // still draw the frame. However when the layer being checkerboarded is moving // due to an impl-animation, we drop the frame to avoid flashing due to the // texture suddenly appearing in the future. DrawResult draw_result = DRAW_SUCCESS; int layers_drawn = 0; const DrawMode draw_mode = GetDrawMode(); int num_missing_tiles = 0; int num_incomplete_tiles = 0; int64_t checkerboarded_no_recording_content_area = 0; int64_t checkerboarded_needs_raster_content_area = 0; bool have_copy_request = active_tree()->property_trees()->effect_tree.HasCopyRequests(); bool have_missing_animated_tiles = false; LayerIterator end = LayerIterator::End(frame->render_surface_layer_list); for (LayerIterator it = LayerIterator::Begin(frame->render_surface_layer_list); it != end; ++it) { RenderPassId target_render_pass_id = it.target_render_surface_layer()->render_surface()->GetRenderPassId(); RenderPass* target_render_pass = FindRenderPassById(frame->render_passes, target_render_pass_id); AppendQuadsData append_quads_data; if (it.represents_target_render_surface()) { if (it->render_surface()->HasCopyRequest()) { active_tree() ->property_trees() ->effect_tree.TakeCopyRequestsAndTransformToSurface( it->render_surface()->EffectTreeIndex(), &target_render_pass->copy_requests); } } else if (it.represents_contributing_render_surface() && it->render_surface()->contributes_to_drawn_surface()) { RenderPassId contributing_render_pass_id = it->render_surface()->GetRenderPassId(); RenderPass* contributing_render_pass = FindRenderPassById(frame->render_passes, contributing_render_pass_id); AppendQuadsForRenderSurfaceLayer(target_render_pass, *it, contributing_render_pass, &append_quads_data); } else if (it.represents_itself() && !it->visible_layer_rect().IsEmpty()) { bool occluded = it->draw_properties().occlusion_in_content_space.IsOccluded( it->visible_layer_rect()); if (!occluded && it->WillDraw(draw_mode, resource_provider_.get())) { DCHECK_EQ(active_tree_.get(), it->layer_tree_impl()); frame->will_draw_layers.push_back(*it); if (it->may_contain_video()) frame->may_contain_video = true; it->AppendQuads(target_render_pass, &append_quads_data); } ++layers_drawn; } rendering_stats_instrumentation_->AddVisibleContentArea( append_quads_data.visible_layer_area); rendering_stats_instrumentation_->AddApproximatedVisibleContentArea( append_quads_data.approximated_visible_content_area); rendering_stats_instrumentation_->AddCheckerboardedVisibleContentArea( append_quads_data.checkerboarded_visible_content_area); rendering_stats_instrumentation_->AddCheckerboardedNoRecordingContentArea( append_quads_data.checkerboarded_no_recording_content_area); rendering_stats_instrumentation_->AddCheckerboardedNeedsRasterContentArea( append_quads_data.checkerboarded_needs_raster_content_area); num_missing_tiles += append_quads_data.num_missing_tiles; num_incomplete_tiles += append_quads_data.num_incomplete_tiles; checkerboarded_no_recording_content_area += append_quads_data.checkerboarded_no_recording_content_area; checkerboarded_needs_raster_content_area += append_quads_data.checkerboarded_needs_raster_content_area; if (append_quads_data.num_missing_tiles > 0) { have_missing_animated_tiles |= !it->was_ever_ready_since_last_transform_animation() || it->screen_space_transform_is_animating(); } else { it->set_was_ever_ready_since_last_transform_animation(true); } } // If CommitToActiveTree() is true, then we wait to draw until // NotifyReadyToDraw. That means we're in as good shape as is possible now, // so there's no reason to stop the draw now (and this is not supported by // SingleThreadProxy). if (have_missing_animated_tiles && !CommitToActiveTree()) draw_result = DRAW_ABORTED_CHECKERBOARD_ANIMATIONS; // When we require high res to draw, abort the draw (almost) always. This does // not cause the scheduler to do a main frame, instead it will continue to try // drawing until we finally complete, so the copy request will not be lost. // TODO(weiliangc): Remove RequiresHighResToDraw. crbug.com/469175 if (num_incomplete_tiles || num_missing_tiles) { if (RequiresHighResToDraw()) draw_result = DRAW_ABORTED_MISSING_HIGH_RES_CONTENT; } // When doing a resourceless software draw, we don't have control over the // surface the compositor draws to, so even though the frame may not be // complete, the previous frame has already been potentially lost, so an // incomplete frame is better than nothing, so this takes highest precidence. if (resourceless_software_draw_) draw_result = DRAW_SUCCESS; #if DCHECK_IS_ON() for (const auto& render_pass : frame->render_passes) { for (auto* quad : render_pass->quad_list) DCHECK(quad->shared_quad_state); } DCHECK(frame->render_passes.back()->output_rect.origin().IsOrigin()); #endif if (!active_tree_->has_transparent_background()) { frame->render_passes.back()->has_transparent_background = false; AppendQuadsToFillScreen( active_tree_->RootScrollLayerDeviceViewportBounds(), frame->render_passes.back().get(), active_tree_->RootRenderSurface(), active_tree_->background_color(), unoccluded_screen_space_region); } RemoveRenderPasses(frame); // If we're making a frame to draw, it better have at least one render pass. DCHECK(!frame->render_passes.empty()); if (have_copy_request) { // Any copy requests left in the tree are not going to get serviced, and // should be aborted. active_tree()->property_trees()->effect_tree.ClearCopyRequests(); // Draw properties depend on copy requests. active_tree()->set_needs_update_draw_properties(); } if (active_tree_->has_ever_been_drawn()) { UMA_HISTOGRAM_COUNTS_100( "Compositing.RenderPass.AppendQuadData.NumMissingTiles", num_missing_tiles); UMA_HISTOGRAM_COUNTS_100( "Compositing.RenderPass.AppendQuadData.NumIncompleteTiles", num_incomplete_tiles); UMA_HISTOGRAM_COUNTS( "Compositing.RenderPass.AppendQuadData." "CheckerboardedNoRecordingContentArea", checkerboarded_no_recording_content_area); UMA_HISTOGRAM_COUNTS( "Compositing.RenderPass.AppendQuadData." "CheckerboardedNeedRasterContentArea", checkerboarded_needs_raster_content_area); } // Should only have one render pass in resourceless software mode. DCHECK(draw_mode != DRAW_MODE_RESOURCELESS_SOFTWARE || frame->render_passes.size() == 1u) << frame->render_passes.size(); TRACE_EVENT_END2("cc", "LayerTreeHostImpl::CalculateRenderPasses", "draw_result", draw_result, "missing tiles", num_missing_tiles); // Draw has to be successful to not drop the copy request layer. // When we have a copy request for a layer, we need to draw even if there // would be animating checkerboards, because failing under those conditions // triggers a new main frame, which may cause the copy request layer to be // destroyed. // TODO(weiliangc): Test copy request w/ CompositorFrameSink recreation. Would // trigger this DCHECK. DCHECK(!have_copy_request || draw_result == DRAW_SUCCESS); // TODO(crbug.com/564832): This workaround to prevent creating unnecessarily // persistent render passes. When a copy request is made, it may force a // separate render pass for the layer, which will persist until a new commit // removes it. Force a commit after copy requests, to remove extra render // passes. if (have_copy_request) client_->SetNeedsCommitOnImplThread(); return draw_result; } void LayerTreeHostImpl::MainThreadHasStoppedFlinging() { browser_controls_offset_manager_->MainThreadHasStoppedFlinging(); if (input_handler_client_) input_handler_client_->MainThreadHasStoppedFlinging(); } void LayerTreeHostImpl::DidAnimateScrollOffset() { client_->SetNeedsCommitOnImplThread(); client_->RenewTreePriority(); } void LayerTreeHostImpl::SetViewportDamage(const gfx::Rect& damage_rect) { viewport_damage_rect_.Union(damage_rect); } DrawResult LayerTreeHostImpl::PrepareToDraw(FrameData* frame) { TRACE_EVENT1("cc", "LayerTreeHostImpl::PrepareToDraw", "SourceFrameNumber", active_tree_->source_frame_number()); if (input_handler_client_) input_handler_client_->ReconcileElasticOverscrollAndRootScroll(); if (const char* client_name = GetClientNameForMetrics()) { size_t total_picture_memory = 0; for (const PictureLayerImpl* layer : active_tree()->picture_layers()) total_picture_memory += layer->GetRasterSource()->GetPictureMemoryUsage(); if (total_picture_memory != 0) { // GetClientNameForMetrics only returns one non-null value over the // lifetime of the process, so this histogram name is runtime constant. UMA_HISTOGRAM_COUNTS( base::StringPrintf("Compositing.%s.PictureMemoryUsageKb", client_name), base::saturated_cast(total_picture_memory / 1024)); } // GetClientNameForMetrics only returns one non-null value over the lifetime // of the process, so this histogram name is runtime constant. UMA_HISTOGRAM_CUSTOM_COUNTS( base::StringPrintf("Compositing.%s.NumActiveLayers", client_name), base::saturated_cast(active_tree_->NumLayers()), 1, 400, 20); } bool update_lcd_text = false; bool ok = active_tree_->UpdateDrawProperties(update_lcd_text); DCHECK(ok) << "UpdateDrawProperties failed during draw"; // This will cause NotifyTileStateChanged() to be called for any tiles that // completed, which will add damage for visible tiles to the frame for them so // they appear as part of the current frame being drawn. tile_manager_.Flush(); frame->render_surface_layer_list = &active_tree_->RenderSurfaceLayerList(); frame->render_passes.clear(); frame->will_draw_layers.clear(); frame->has_no_damage = false; frame->may_contain_video = false; if (active_tree_->RootRenderSurface()) { gfx::Rect device_viewport_damage_rect = viewport_damage_rect_; viewport_damage_rect_ = gfx::Rect(); active_tree_->RootRenderSurface()->damage_tracker()->AddDamageNextUpdate( device_viewport_damage_rect); } DrawResult draw_result = CalculateRenderPasses(frame); if (draw_result != DRAW_SUCCESS) { DCHECK(!resourceless_software_draw_); return draw_result; } // If we return DRAW_SUCCESS, then we expect DrawLayers() to be called before // this function is called again. return draw_result; } void LayerTreeHostImpl::RemoveRenderPasses(FrameData* frame) { // There is always at least a root RenderPass. DCHECK_GE(frame->render_passes.size(), 1u); // A set of RenderPasses that we have seen. std::set pass_exists; // A set of RenderPassDrawQuads that we have seen (stored by the RenderPasses // they refer to). base::SmallMap> pass_references; // Iterate RenderPasses in draw order, removing empty render passes (except // the root RenderPass). for (size_t i = 0; i < frame->render_passes.size(); ++i) { RenderPass* pass = frame->render_passes[i].get(); // Remove orphan RenderPassDrawQuads. for (auto it = pass->quad_list.begin(); it != pass->quad_list.end();) { if (it->material != DrawQuad::RENDER_PASS) { ++it; continue; } const RenderPassDrawQuad* quad = RenderPassDrawQuad::MaterialCast(*it); // If the RenderPass doesn't exist, we can remove the quad. if (pass_exists.count(quad->render_pass_id)) { // Otherwise, save a reference to the RenderPass so we know there's a // quad using it. pass_references[quad->render_pass_id]++; ++it; } else { it = pass->quad_list.EraseAndInvalidateAllPointers(it); } } if (i == frame->render_passes.size() - 1) { // Don't remove the root RenderPass. break; } if (pass->quad_list.empty() && pass->copy_requests.empty()) { // Remove the pass and decrement |i| to counter the for loop's increment, // so we don't skip the next pass in the loop. frame->render_passes.erase(frame->render_passes.begin() + i); --i; continue; } pass_exists.insert(pass->id); } // Remove RenderPasses that are not referenced by any draw quads or copy // requests (except the root RenderPass). for (size_t i = 0; i < frame->render_passes.size() - 1; ++i) { // Iterating from the back of the list to the front, skipping over the // back-most (root) pass, in order to remove each qualified RenderPass, and // drop references to earlier RenderPasses allowing them to be removed to. RenderPass* pass = frame->render_passes[frame->render_passes.size() - 2 - i].get(); if (!pass->copy_requests.empty()) continue; if (pass_references[pass->id]) continue; for (auto it = pass->quad_list.begin(); it != pass->quad_list.end(); ++it) { if (it->material != DrawQuad::RENDER_PASS) continue; const RenderPassDrawQuad* quad = RenderPassDrawQuad::MaterialCast(*it); pass_references[quad->render_pass_id]--; } frame->render_passes.erase(frame->render_passes.end() - 2 - i); --i; } } void LayerTreeHostImpl::EvictTexturesForTesting() { UpdateTileManagerMemoryPolicy(ManagedMemoryPolicy(0)); } void LayerTreeHostImpl::BlockNotifyReadyToActivateForTesting(bool block) { NOTREACHED(); } void LayerTreeHostImpl::ResetTreesForTesting() { if (active_tree_) active_tree_->DetachLayers(); active_tree_ = base::MakeUnique(this, active_tree()->page_scale_factor(), active_tree()->top_controls_shown_ratio(), active_tree()->elastic_overscroll()); active_tree_->property_trees()->is_active = true; if (pending_tree_) pending_tree_->DetachLayers(); pending_tree_ = nullptr; pending_tree_duration_timer_ = nullptr; if (recycle_tree_) recycle_tree_->DetachLayers(); recycle_tree_ = nullptr; } size_t LayerTreeHostImpl::SourceAnimationFrameNumberForTesting() const { return fps_counter_->current_frame_number(); } void LayerTreeHostImpl::UpdateTileManagerMemoryPolicy( const ManagedMemoryPolicy& policy) { if (!resource_pool_) return; global_tile_state_.hard_memory_limit_in_bytes = 0; global_tile_state_.soft_memory_limit_in_bytes = 0; if (visible_ && policy.bytes_limit_when_visible > 0) { global_tile_state_.hard_memory_limit_in_bytes = policy.bytes_limit_when_visible; global_tile_state_.soft_memory_limit_in_bytes = (static_cast(global_tile_state_.hard_memory_limit_in_bytes) * settings_.max_memory_for_prepaint_percentage) / 100; } global_tile_state_.memory_limit_policy = ManagedMemoryPolicy::PriorityCutoffToTileMemoryLimitPolicy( visible_ ? policy.priority_cutoff_when_visible : gpu::MemoryAllocation::CUTOFF_ALLOW_NOTHING); global_tile_state_.num_resources_limit = policy.num_resources_limit; if (global_tile_state_.hard_memory_limit_in_bytes > 0) { // If |global_tile_state_.hard_memory_limit_in_bytes| is greater than 0, we // consider our contexts visible. Notify the contexts here. We handle // becoming invisible in NotifyAllTileTasksComplete to avoid interrupting // running work. SetContextVisibility(true); // If |global_tile_state_.hard_memory_limit_in_bytes| is greater than 0, we // allow the image decode controller to retain resources. We handle the // equal to 0 case in NotifyAllTileTasksComplete to avoid interrupting // running work. if (image_decode_controller_) image_decode_controller_->SetShouldAggressivelyFreeResources(false); } DCHECK(resource_pool_); resource_pool_->CheckBusyResources(); // Soft limit is used for resource pool such that memory returns to soft // limit after going over. resource_pool_->SetResourceUsageLimits( global_tile_state_.soft_memory_limit_in_bytes, global_tile_state_.num_resources_limit); DidModifyTilePriorities(); } void LayerTreeHostImpl::DidModifyTilePriorities() { // Mark priorities as dirty and schedule a PrepareTiles(). tile_priorities_dirty_ = true; client_->SetNeedsPrepareTilesOnImplThread(); } std::unique_ptr LayerTreeHostImpl::BuildRasterQueue( TreePriority tree_priority, RasterTilePriorityQueue::Type type) { TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("cc.debug"), "LayerTreeHostImpl::BuildRasterQueue"); return RasterTilePriorityQueue::Create(active_tree_->picture_layers(), pending_tree_ ? pending_tree_->picture_layers() : std::vector(), tree_priority, type); } std::unique_ptr LayerTreeHostImpl::BuildEvictionQueue(TreePriority tree_priority) { TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("cc.debug"), "LayerTreeHostImpl::BuildEvictionQueue"); std::unique_ptr queue( new EvictionTilePriorityQueue); queue->Build(active_tree_->picture_layers(), pending_tree_ ? pending_tree_->picture_layers() : std::vector(), tree_priority); return queue; } void LayerTreeHostImpl::SetIsLikelyToRequireADraw( bool is_likely_to_require_a_draw) { // Proactively tell the scheduler that we expect to draw within each vsync // until we get all the tiles ready to draw. If we happen to miss a required // for draw tile here, then we will miss telling the scheduler each frame that // we intend to draw so it may make worse scheduling decisions. is_likely_to_require_a_draw_ = is_likely_to_require_a_draw; } gfx::ColorSpace LayerTreeHostImpl::GetTileColorSpace() const { if (!sync_tree()) return gfx::ColorSpace(); return sync_tree()->device_color_space(); } void LayerTreeHostImpl::NotifyReadyToActivate() { client_->NotifyReadyToActivate(); } void LayerTreeHostImpl::NotifyReadyToDraw() { // Tiles that are ready will cause NotifyTileStateChanged() to be called so we // don't need to schedule a draw here. Just stop WillBeginImplFrame() from // causing optimistic requests to draw a frame. is_likely_to_require_a_draw_ = false; client_->NotifyReadyToDraw(); } void LayerTreeHostImpl::NotifyAllTileTasksCompleted() { // The tile tasks started by the most recent call to PrepareTiles have // completed. Now is a good time to free resources if necessary. if (global_tile_state_.hard_memory_limit_in_bytes == 0) { // Free image decode controller resources before notifying the // contexts of visibility change. This ensures that the imaged decode // controller has released all Skia refs at the time Skia's cleanup // executes (within worker context's cleanup). if (image_decode_controller_) image_decode_controller_->SetShouldAggressivelyFreeResources(true); SetContextVisibility(false); } } void LayerTreeHostImpl::NotifyTileStateChanged(const Tile* tile) { TRACE_EVENT0("cc", "LayerTreeHostImpl::NotifyTileStateChanged"); if (active_tree_) { LayerImpl* layer_impl = active_tree_->FindActiveTreeLayerById(tile->layer_id()); if (layer_impl) layer_impl->NotifyTileStateChanged(tile); } if (pending_tree_) { LayerImpl* layer_impl = pending_tree_->FindPendingTreeLayerById(tile->layer_id()); if (layer_impl) layer_impl->NotifyTileStateChanged(tile); } // Check for a non-null active tree to avoid doing this during shutdown. if (active_tree_ && !client_->IsInsideDraw() && tile->required_for_draw()) { // The LayerImpl::NotifyTileStateChanged() should damage the layer, so this // redraw will make those tiles be displayed. SetNeedsRedraw(); } } void LayerTreeHostImpl::SetMemoryPolicy(const ManagedMemoryPolicy& policy) { DCHECK(task_runner_provider_->IsImplThread()); SetManagedMemoryPolicy(policy); // This is short term solution to synchronously drop tile resources when // using synchronous compositing to avoid memory usage regression. // TODO(boliu): crbug.com/499004 to track removing this. if (!policy.bytes_limit_when_visible && resource_pool_ && settings_.using_synchronous_renderer_compositor) { ReleaseTileResources(); CleanUpTileManagerAndUIResources(); // Force a call to NotifyAllTileTasks completed - otherwise this logic may // be skipped if no work was enqueued at the time the tile manager was // destroyed. NotifyAllTileTasksCompleted(); CreateTileManagerResources(); RecreateTileResources(); } } void LayerTreeHostImpl::SetTreeActivationCallback( const base::Closure& callback) { DCHECK(task_runner_provider_->IsImplThread()); tree_activation_callback_ = callback; } void LayerTreeHostImpl::SetManagedMemoryPolicy( const ManagedMemoryPolicy& policy) { if (cached_managed_memory_policy_ == policy) return; ManagedMemoryPolicy old_policy = ActualManagedMemoryPolicy(); cached_managed_memory_policy_ = policy; ManagedMemoryPolicy actual_policy = ActualManagedMemoryPolicy(); if (old_policy == actual_policy) return; UpdateTileManagerMemoryPolicy(actual_policy); // If there is already enough memory to draw everything imaginable and the // new memory limit does not change this, then do not re-commit. Don't bother // skipping commits if this is not visible (commits don't happen when not // visible, there will almost always be a commit when this becomes visible). bool needs_commit = true; if (visible() && actual_policy.bytes_limit_when_visible >= max_memory_needed_bytes_ && old_policy.bytes_limit_when_visible >= max_memory_needed_bytes_ && actual_policy.priority_cutoff_when_visible == old_policy.priority_cutoff_when_visible) { needs_commit = false; } if (needs_commit) client_->SetNeedsCommitOnImplThread(); } void LayerTreeHostImpl::SetExternalTilePriorityConstraints( const gfx::Rect& viewport_rect, const gfx::Transform& transform) { gfx::Rect viewport_rect_for_tile_priority_in_view_space; gfx::Transform screen_to_view(gfx::Transform::kSkipInitialization); if (transform.GetInverse(&screen_to_view)) { // Convert from screen space to view space. viewport_rect_for_tile_priority_in_view_space = MathUtil::ProjectEnclosingClippedRect(screen_to_view, viewport_rect); } const bool tile_priority_params_changed = viewport_rect_for_tile_priority_ != viewport_rect_for_tile_priority_in_view_space; viewport_rect_for_tile_priority_ = viewport_rect_for_tile_priority_in_view_space; if (tile_priority_params_changed) { active_tree_->set_needs_update_draw_properties(); if (pending_tree_) pending_tree_->set_needs_update_draw_properties(); // Compositor, not CompositorFrameSink, is responsible for setting damage // and triggering redraw for constraint changes. SetFullViewportDamage(); SetNeedsRedraw(); } } void LayerTreeHostImpl::DidReceiveCompositorFrameAck() { client_->DidReceiveCompositorFrameAckOnImplThread(); } void LayerTreeHostImpl::ReclaimResources( const ReturnedResourceArray& resources) { // TODO(piman): We may need to do some validation on this ack before // processing it. if (resource_provider_) resource_provider_->ReceiveReturnsFromParent(resources); // In OOM, we now might be able to release more resources that were held // because they were exported. if (resource_pool_) { if (resource_pool_->memory_usage_bytes()) { const size_t kMegabyte = 1024 * 1024; // This is a good time to log memory usage. A chunk of work has just // completed but none of the memory used for that work has likely been // freed. UMA_HISTOGRAM_MEMORY_MB( "Renderer4.ResourcePoolMemoryUsage", static_cast(resource_pool_->memory_usage_bytes() / kMegabyte)); } resource_pool_->CheckBusyResources(); resource_pool_->ReduceResourceUsage(); } // If we're not visible, we likely released resources, so we want to // aggressively flush here to make sure those DeleteTextures make it to the // GPU process to free up the memory. if (compositor_frame_sink_->context_provider() && !visible_) { compositor_frame_sink_->context_provider() ->ContextGL() ->ShallowFlushCHROMIUM(); } } void LayerTreeHostImpl::OnDraw(const gfx::Transform& transform, const gfx::Rect& viewport, bool resourceless_software_draw) { DCHECK(!resourceless_software_draw_); const bool transform_changed = external_transform_ != transform; const bool viewport_changed = external_viewport_ != viewport; external_transform_ = transform; external_viewport_ = viewport; { base::AutoReset resourceless_software_draw_reset( &resourceless_software_draw_, resourceless_software_draw); // For resourceless software draw, always set full damage to ensure they // always swap. Otherwise, need to set redraw for any changes to draw // parameters. if (transform_changed || viewport_changed || resourceless_software_draw_) { SetFullViewportDamage(); SetNeedsRedraw(); active_tree_->set_needs_update_draw_properties(); } if (resourceless_software_draw) { client_->OnCanDrawStateChanged(CanDraw()); } client_->OnDrawForCompositorFrameSink(resourceless_software_draw_); } if (resourceless_software_draw) { active_tree_->set_needs_update_draw_properties(); client_->OnCanDrawStateChanged(CanDraw()); // This draw may have reset all damage, which would lead to subsequent // incorrect hardware draw, so explicitly set damage for next hardware // draw as well. SetFullViewportDamage(); } } void LayerTreeHostImpl::OnCanDrawStateChangedForTree() { client_->OnCanDrawStateChanged(CanDraw()); } CompositorFrameMetadata LayerTreeHostImpl::MakeCompositorFrameMetadata() const { CompositorFrameMetadata metadata; metadata.device_scale_factor = active_tree_->painted_device_scale_factor() * active_tree_->device_scale_factor(); metadata.page_scale_factor = active_tree_->current_page_scale_factor(); metadata.scrollable_viewport_size = active_tree_->ScrollableViewportSize(); metadata.root_layer_size = active_tree_->ScrollableSize(); metadata.min_page_scale_factor = active_tree_->min_page_scale_factor(); metadata.max_page_scale_factor = active_tree_->max_page_scale_factor(); metadata.top_controls_height = browser_controls_offset_manager_->TopControlsHeight(); metadata.top_controls_shown_ratio = browser_controls_offset_manager_->TopControlsShownRatio(); metadata.bottom_controls_height = browser_controls_offset_manager_->BottomControlsHeight(); metadata.bottom_controls_shown_ratio = browser_controls_offset_manager_->BottomControlsShownRatio(); metadata.root_background_color = active_tree_->background_color(); metadata.content_source_id = active_tree_->content_source_id(); active_tree_->GetViewportSelection(&metadata.selection); if (OuterViewportScrollLayer()) { metadata.root_overflow_x_hidden = !OuterViewportScrollLayer()->user_scrollable_horizontal(); metadata.root_overflow_y_hidden = !OuterViewportScrollLayer()->user_scrollable_vertical(); } if (GetDrawMode() == DRAW_MODE_RESOURCELESS_SOFTWARE) { metadata.is_resourceless_software_draw_with_scroll_or_animation = IsActivelyScrolling() || mutator_host_->NeedsAnimateLayers(); } for (LayerImpl* surface_layer : active_tree_->SurfaceLayers()) { metadata.referenced_surfaces.push_back( static_cast(surface_layer)->surface_id()); } if (!InnerViewportScrollLayer()) return metadata; metadata.root_overflow_x_hidden |= !InnerViewportScrollLayer()->user_scrollable_horizontal(); metadata.root_overflow_y_hidden |= !InnerViewportScrollLayer()->user_scrollable_vertical(); // TODO(miletus) : Change the metadata to hold ScrollOffset. metadata.root_scroll_offset = gfx::ScrollOffsetToVector2dF(active_tree_->TotalScrollOffset()); return metadata; } bool LayerTreeHostImpl::DrawLayers(FrameData* frame) { DCHECK(CanDraw()); DCHECK_EQ(frame->has_no_damage, frame->render_passes.empty()); TRACE_EVENT0("cc,benchmark", "LayerTreeHostImpl::DrawLayers"); ResetRequiresHighResToDraw(); if (frame->has_no_damage) { DCHECK(!resourceless_software_draw_); TRACE_EVENT_INSTANT0("cc", "EarlyOut_NoDamage", TRACE_EVENT_SCOPE_THREAD); active_tree()->BreakSwapPromises(SwapPromise::SWAP_FAILS); return false; } fps_counter_->SaveTimeStamp(CurrentBeginFrameArgs().frame_time, !compositor_frame_sink_->context_provider()); rendering_stats_instrumentation_->IncrementFrameCount(1); memory_history_->SaveEntry(tile_manager_.memory_stats_from_last_assign()); if (debug_state_.ShowHudRects()) { debug_rect_history_->SaveDebugRectsForCurrentFrame( active_tree(), active_tree_->hud_layer(), *frame->render_surface_layer_list, debug_state_); } bool is_new_trace; TRACE_EVENT_IS_NEW_TRACE(&is_new_trace); if (is_new_trace) { if (pending_tree_) { LayerTreeHostCommon::CallFunctionForEveryLayer( pending_tree(), [](LayerImpl* layer) { layer->DidBeginTracing(); }); } LayerTreeHostCommon::CallFunctionForEveryLayer( active_tree(), [](LayerImpl* layer) { layer->DidBeginTracing(); }); } { TRACE_EVENT0("cc", "DrawLayers.FrameViewerTracing"); TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID( frame_viewer_instrumentation::kCategoryLayerTree, "cc::LayerTreeHostImpl", id_, AsValueWithFrame(frame)); } const DrawMode draw_mode = GetDrawMode(); // Because the contents of the HUD depend on everything else in the frame, the // contents of its texture are updated as the last thing before the frame is // drawn. if (active_tree_->hud_layer()) { TRACE_EVENT0("cc", "DrawLayers.UpdateHudTexture"); active_tree_->hud_layer()->UpdateHudTexture(draw_mode, resource_provider_.get()); } CompositorFrameMetadata metadata = MakeCompositorFrameMetadata(); metadata.may_contain_video = frame->may_contain_video; active_tree()->FinishSwapPromises(&metadata); for (auto& latency : metadata.latency_info) { TRACE_EVENT_WITH_FLOW1("input,benchmark", "LatencyInfo.Flow", TRACE_ID_DONT_MANGLE(latency.trace_id()), TRACE_EVENT_FLAG_FLOW_IN | TRACE_EVENT_FLAG_FLOW_OUT, "step", "SwapBuffers"); // Only add the latency component once for renderer swap, not the browser // swap. if (!latency.FindLatency(ui::INPUT_EVENT_LATENCY_RENDERER_SWAP_COMPONENT, 0, nullptr)) { latency.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_RENDERER_SWAP_COMPONENT, 0, 0); } } // Collect all resource ids in the render passes into a single array. ResourceProvider::ResourceIdArray resources; for (const auto& render_pass : frame->render_passes) { for (auto* quad : render_pass->quad_list) { for (ResourceId resource_id : quad->resources) resources.push_back(resource_id); } } auto data = base::MakeUnique(); resource_provider_->PrepareSendToParent(resources, &data->resource_list); data->render_pass_list = std::move(frame->render_passes); CompositorFrame compositor_frame; compositor_frame.metadata = std::move(metadata); compositor_frame.delegated_frame_data = std::move(data); compositor_frame_sink_->SubmitCompositorFrame(std::move(compositor_frame)); // The next frame should start by assuming nothing has changed, and changes // are noted as they occur. // TODO(boliu): If we did a temporary software renderer frame, propogate the // damage forward to the next frame. for (size_t i = 0; i < frame->render_surface_layer_list->size(); i++) { auto* surface = (*frame->render_surface_layer_list)[i]->render_surface(); surface->damage_tracker()->DidDrawDamagedArea(); } active_tree_->ResetAllChangeTracking(); active_tree_->set_has_ever_been_drawn(true); devtools_instrumentation::DidDrawFrame(id_); benchmark_instrumentation::IssueImplThreadRenderingStatsEvent( rendering_stats_instrumentation_->impl_thread_rendering_stats()); rendering_stats_instrumentation_->AccumulateAndClearImplThreadStats(); return true; } void LayerTreeHostImpl::DidDrawAllLayers(const FrameData& frame) { for (size_t i = 0; i < frame.will_draw_layers.size(); ++i) frame.will_draw_layers[i]->DidDraw(resource_provider_.get()); for (auto* it : video_frame_controllers_) it->DidDrawFrame(); } int LayerTreeHostImpl::RequestedMSAASampleCount() const { if (settings_.gpu_rasterization_msaa_sample_count == -1) { // Use the most up-to-date version of device_scale_factor that we have. float device_scale_factor = pending_tree_ ? pending_tree_->device_scale_factor() : active_tree_->device_scale_factor(); return device_scale_factor >= 2.0f ? 4 : 8; } return settings_.gpu_rasterization_msaa_sample_count; } void LayerTreeHostImpl::SetHasGpuRasterizationTrigger(bool flag) { if (has_gpu_rasterization_trigger_ != flag) { has_gpu_rasterization_trigger_ = flag; need_update_gpu_rasterization_status_ = true; } } void LayerTreeHostImpl::SetContentIsSuitableForGpuRasterization(bool flag) { if (content_is_suitable_for_gpu_rasterization_ != flag) { content_is_suitable_for_gpu_rasterization_ = flag; need_update_gpu_rasterization_status_ = true; } } bool LayerTreeHostImpl::CanUseGpuRasterization() { if (!(compositor_frame_sink_ && compositor_frame_sink_->context_provider() && compositor_frame_sink_->worker_context_provider())) return false; ContextProvider* context_provider = compositor_frame_sink_->worker_context_provider(); ContextProvider::ScopedContextLock scoped_context(context_provider); if (!context_provider->GrContext()) return false; return true; } bool LayerTreeHostImpl::UpdateGpuRasterizationStatus() { // TODO(danakj): Can we avoid having this run when there's no // CompositorFrameSink? // For now just early out and leave things unchanged, we'll come back here // when we get an CompositorFrameSink. if (!compositor_frame_sink_) return false; int requested_msaa_samples = RequestedMSAASampleCount(); int max_msaa_samples = 0; ContextProvider* compositor_context_provider = compositor_frame_sink_->context_provider(); if (compositor_context_provider) { const auto& caps = compositor_context_provider->ContextCapabilities(); if (!caps.msaa_is_slow) max_msaa_samples = caps.max_samples; } bool use_gpu = false; bool use_msaa = false; bool using_msaa_for_complex_content = requested_msaa_samples > 0 && max_msaa_samples >= requested_msaa_samples; if (settings_.gpu_rasterization_forced) { use_gpu = true; gpu_rasterization_status_ = GpuRasterizationStatus::ON_FORCED; use_msaa = !content_is_suitable_for_gpu_rasterization_ && using_msaa_for_complex_content; if (use_msaa) { gpu_rasterization_status_ = GpuRasterizationStatus::MSAA_CONTENT; } } else if (!settings_.gpu_rasterization_enabled) { gpu_rasterization_status_ = GpuRasterizationStatus::OFF_DEVICE; } else if (!has_gpu_rasterization_trigger_) { gpu_rasterization_status_ = GpuRasterizationStatus::OFF_VIEWPORT; } else if (content_is_suitable_for_gpu_rasterization_) { use_gpu = true; gpu_rasterization_status_ = GpuRasterizationStatus::ON; } else if (using_msaa_for_complex_content) { use_gpu = use_msaa = true; gpu_rasterization_status_ = GpuRasterizationStatus::MSAA_CONTENT; } else { gpu_rasterization_status_ = GpuRasterizationStatus::OFF_CONTENT; } if (use_gpu && !use_gpu_rasterization_) { if (!CanUseGpuRasterization()) { // If GPU rasterization is unusable, e.g. if GlContext could not // be created due to losing the GL context, force use of software // raster. use_gpu = false; use_msaa = false; gpu_rasterization_status_ = GpuRasterizationStatus::OFF_DEVICE; } } if (use_gpu == use_gpu_rasterization_ && use_msaa == use_msaa_) return false; // Note that this must happen first, in case the rest of the calls want to // query the new state of |use_gpu_rasterization_|. use_gpu_rasterization_ = use_gpu; use_msaa_ = use_msaa; return true; } void LayerTreeHostImpl::UpdateTreeResourcesForGpuRasterizationIfNeeded() { if (!need_update_gpu_rasterization_status_) return; if (!UpdateGpuRasterizationStatus()) return; // Clean up and replace existing tile manager with another one that uses // appropriate rasterizer. Only do this however if we already have a // resource pool, since otherwise we might not be able to create a new // one. ReleaseTileResources(); if (resource_pool_) { CleanUpTileManagerAndUIResources(); CreateTileManagerResources(); } RecreateTileResources(); // We have released tilings for both active and pending tree. // We would not have any content to draw until the pending tree is activated. // Prevent the active tree from drawing until activation. // TODO(crbug.com/469175): Replace with RequiresHighResToDraw. SetRequiresHighResToDraw(); } void LayerTreeHostImpl::WillBeginImplFrame(const BeginFrameArgs& args) { current_begin_frame_tracker_.Start(args); if (is_likely_to_require_a_draw_) { // Optimistically schedule a draw. This will let us expect the tile manager // to complete its work so that we can draw new tiles within the impl frame // we are beginning now. SetNeedsRedraw(); } Animate(); for (auto* it : video_frame_controllers_) it->OnBeginFrame(args); } void LayerTreeHostImpl::DidFinishImplFrame() { current_begin_frame_tracker_.Finish(); } void LayerTreeHostImpl::UpdateViewportContainerSizes() { LayerImpl* inner_container = active_tree_->InnerViewportContainerLayer(); LayerImpl* outer_container = active_tree_->OuterViewportContainerLayer(); if (!inner_container) return; ViewportAnchor anchor(InnerViewportScrollLayer(), OuterViewportScrollLayer()); float top_controls_layout_height = active_tree_->browser_controls_shrink_blink_size() ? active_tree_->top_controls_height() : 0.f; float delta_from_top_controls = top_controls_layout_height - browser_controls_offset_manager_->ContentTopOffset(); float bottom_controls_layout_height = active_tree_->browser_controls_shrink_blink_size() ? active_tree_->bottom_controls_height() : 0.f; delta_from_top_controls += bottom_controls_layout_height - browser_controls_offset_manager_->ContentBottomOffset(); // Adjust the viewport layers by shrinking/expanding the container to account // for changes in the size (e.g. browser controls) since the last resize from // Blink. gfx::Vector2dF amount_to_expand(0.f, delta_from_top_controls); inner_container->SetBoundsDelta(amount_to_expand); if (outer_container && !outer_container->BoundsForScrolling().IsEmpty()) { // Adjust the outer viewport container as well, since adjusting only the // inner may cause its bounds to exceed those of the outer, causing scroll // clamping. gfx::Vector2dF amount_to_expand_scaled = gfx::ScaleVector2d( amount_to_expand, 1.f / active_tree_->min_page_scale_factor()); outer_container->SetBoundsDelta(amount_to_expand_scaled); active_tree_->InnerViewportScrollLayer()->SetBoundsDelta( amount_to_expand_scaled); anchor.ResetViewportToAnchoredPosition(); } } void LayerTreeHostImpl::SynchronouslyInitializeAllTiles() { // Only valid for the single-threaded non-scheduled/synchronous case // using the zero copy raster worker pool. single_thread_synchronous_task_graph_runner_->RunUntilIdle(); } void LayerTreeHostImpl::DidLoseCompositorFrameSink() { if (resource_provider_) resource_provider_->DidLoseContextProvider(); has_valid_compositor_frame_sink_ = false; client_->DidLoseCompositorFrameSinkOnImplThread(); } bool LayerTreeHostImpl::HaveRootScrollLayer() const { return !!InnerViewportScrollLayer(); } LayerImpl* LayerTreeHostImpl::InnerViewportScrollLayer() const { return active_tree_->InnerViewportScrollLayer(); } LayerImpl* LayerTreeHostImpl::OuterViewportScrollLayer() const { return active_tree_->OuterViewportScrollLayer(); } LayerImpl* LayerTreeHostImpl::CurrentlyScrollingLayer() const { return active_tree_->CurrentlyScrollingLayer(); } bool LayerTreeHostImpl::IsActivelyScrolling() const { if (!CurrentlyScrollingLayer()) return false; // On Android WebView root flings are controlled by the application, // so the compositor does not animate them and can't tell if they // are actually animating. So assume there are none. if (settings_.ignore_root_layer_flings && IsCurrentlyScrollingViewport()) return false; return did_lock_scrolling_layer_; } void LayerTreeHostImpl::CreatePendingTree() { CHECK(!pending_tree_); if (recycle_tree_) { recycle_tree_.swap(pending_tree_); } else { pending_tree_ = base::MakeUnique( this, active_tree()->page_scale_factor(), active_tree()->top_controls_shown_ratio(), active_tree()->elastic_overscroll()); } client_->OnCanDrawStateChanged(CanDraw()); TRACE_EVENT_ASYNC_BEGIN0("cc", "PendingTree:waiting", pending_tree_.get()); DCHECK(!pending_tree_duration_timer_); pending_tree_duration_timer_.reset(new PendingTreeDurationHistogramTimer()); } void LayerTreeHostImpl::ActivateSyncTree() { if (pending_tree_) { TRACE_EVENT_ASYNC_END0("cc", "PendingTree:waiting", pending_tree_.get()); DCHECK(pending_tree_duration_timer_); // Reset will call the destructor and log the timer histogram. pending_tree_duration_timer_.reset(); // Process any requests in the UI resource queue. The request queue is // given in LayerTreeHost::FinishCommitOnImplThread. This must take place // before the swap. pending_tree_->ProcessUIResourceRequestQueue(); if (pending_tree_->needs_full_tree_sync()) { TreeSynchronizer::SynchronizeTrees(pending_tree_.get(), active_tree_.get()); } // Property trees may store damage status. We preserve the active tree // damage status by pushing the damage status from active tree property // trees to pending tree property trees or by moving it onto the layers. if (active_tree_->property_trees()->changed) { if (pending_tree_->property_trees()->sequence_number == active_tree_->property_trees()->sequence_number) active_tree_->property_trees()->PushChangeTrackingTo( pending_tree_->property_trees()); else active_tree_->MoveChangeTrackingToLayers(); } active_tree_->property_trees()->PushOpacityIfNeeded( pending_tree_->property_trees()); TreeSynchronizer::PushLayerProperties(pending_tree(), active_tree()); pending_tree_->PushPropertiesTo(active_tree_.get()); if (!pending_tree_->LayerListIsEmpty()) pending_tree_->property_trees()->ResetAllChangeTracking(); // Now that we've synced everything from the pending tree to the active // tree, rename the pending tree the recycle tree so we can reuse it on the // next sync. DCHECK(!recycle_tree_); pending_tree_.swap(recycle_tree_); // If we commit to the active tree directly, this is already done during // commit. ActivateAnimations(); // Compositor worker operates on the active tree so we have to run again // after activation. Mutate(CurrentBeginFrameArgs().frame_time); } else { active_tree_->ProcessUIResourceRequestQueue(); } UpdateViewportContainerSizes(); active_tree_->DidBecomeActive(); client_->RenewTreePriority(); // If we have any picture layers, then by activating we also modified tile // priorities. if (!active_tree_->picture_layers().empty()) DidModifyTilePriorities(); client_->OnCanDrawStateChanged(CanDraw()); client_->DidActivateSyncTree(); if (!tree_activation_callback_.is_null()) tree_activation_callback_.Run(); std::unique_ptr pending_page_scale_animation = active_tree_->TakePendingPageScaleAnimation(); if (pending_page_scale_animation) { StartPageScaleAnimation(pending_page_scale_animation->target_offset, pending_page_scale_animation->use_anchor, pending_page_scale_animation->scale, pending_page_scale_animation->duration); } // Activation can change the root scroll offset, so inform the synchronous // input handler. UpdateRootLayerStateForSynchronousInputHandler(); } void LayerTreeHostImpl::SetVisible(bool visible) { DCHECK(task_runner_provider_->IsImplThread()); if (visible_ == visible) return; visible_ = visible; DidVisibilityChange(this, visible_); UpdateTileManagerMemoryPolicy(ActualManagedMemoryPolicy()); // If we just became visible, we have to ensure that we draw high res tiles, // to prevent checkerboard/low res flashes. if (visible_) { // TODO(crbug.com/469175): Replace with RequiresHighResToDraw. SetRequiresHighResToDraw(); } else { EvictAllUIResources(); // Call PrepareTiles to evict tiles when we become invisible. PrepareTiles(); } } void LayerTreeHostImpl::SetNeedsOneBeginImplFrame() { // TODO(miletus): This is just the compositor-thread-side call to the // SwapPromiseMonitor to say something happened that may cause a swap in the // future. The name should not refer to SetNeedsRedraw but it does for now. NotifySwapPromiseMonitorsOfSetNeedsRedraw(); client_->SetNeedsOneBeginImplFrameOnImplThread(); } void LayerTreeHostImpl::SetNeedsRedraw() { NotifySwapPromiseMonitorsOfSetNeedsRedraw(); client_->SetNeedsRedrawOnImplThread(); } ManagedMemoryPolicy LayerTreeHostImpl::ActualManagedMemoryPolicy() const { ManagedMemoryPolicy actual = cached_managed_memory_policy_; if (debug_state_.rasterize_only_visible_content) { actual.priority_cutoff_when_visible = gpu::MemoryAllocation::CUTOFF_ALLOW_REQUIRED_ONLY; } else if (use_gpu_rasterization()) { actual.priority_cutoff_when_visible = gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE; } return actual; } void LayerTreeHostImpl::ReleaseTreeResources() { active_tree_->ReleaseResources(); if (pending_tree_) pending_tree_->ReleaseResources(); if (recycle_tree_) recycle_tree_->ReleaseResources(); EvictAllUIResources(); } void LayerTreeHostImpl::ReleaseTileResources() { active_tree_->ReleaseTileResources(); if (pending_tree_) pending_tree_->ReleaseTileResources(); if (recycle_tree_) recycle_tree_->ReleaseTileResources(); } void LayerTreeHostImpl::RecreateTileResources() { active_tree_->RecreateTileResources(); if (pending_tree_) pending_tree_->RecreateTileResources(); if (recycle_tree_) recycle_tree_->RecreateTileResources(); } void LayerTreeHostImpl::CreateTileManagerResources() { CreateResourceAndRasterBufferProvider(&raster_buffer_provider_, &resource_pool_); if (use_gpu_rasterization_) { image_decode_controller_ = base::MakeUnique( compositor_frame_sink_->worker_context_provider(), settings_.renderer_settings.preferred_tile_format, settings_.gpu_decoded_image_budget_bytes); } else { image_decode_controller_ = base::MakeUnique( settings_.renderer_settings.preferred_tile_format, settings_.software_decoded_image_budget_bytes); } // Pass the single-threaded synchronous task graph runner to the worker pool // if we're in synchronous single-threaded mode. TaskGraphRunner* task_graph_runner = task_graph_runner_; if (is_synchronous_single_threaded_) { DCHECK(!single_thread_synchronous_task_graph_runner_); single_thread_synchronous_task_graph_runner_.reset( new SynchronousTaskGraphRunner); task_graph_runner = single_thread_synchronous_task_graph_runner_.get(); } // TODO(vmpstr): Initialize tile task limit at ctor time. tile_manager_.SetResources( resource_pool_.get(), image_decode_controller_.get(), task_graph_runner, raster_buffer_provider_.get(), is_synchronous_single_threaded_ ? std::numeric_limits::max() : settings_.scheduled_raster_task_limit, use_gpu_rasterization_); UpdateTileManagerMemoryPolicy(ActualManagedMemoryPolicy()); } void LayerTreeHostImpl::CreateResourceAndRasterBufferProvider( std::unique_ptr* raster_buffer_provider, std::unique_ptr* resource_pool) { DCHECK(GetTaskRunner()); // TODO(vmpstr): Make this a DCHECK (or remove) when crbug.com/419086 is // resolved. CHECK(resource_provider_); ContextProvider* compositor_context_provider = compositor_frame_sink_->context_provider(); if (!compositor_context_provider) { *resource_pool = ResourcePool::Create(resource_provider_.get(), GetTaskRunner(), ResourcePool::kDefaultExpirationDelay); *raster_buffer_provider = BitmapRasterBufferProvider::Create(resource_provider_.get()); return; } ContextProvider* worker_context_provider = compositor_frame_sink_->worker_context_provider(); if (use_gpu_rasterization_) { DCHECK(worker_context_provider); *resource_pool = ResourcePool::Create(resource_provider_.get(), GetTaskRunner(), ResourcePool::kDefaultExpirationDelay); int msaa_sample_count = use_msaa_ ? RequestedMSAASampleCount() : 0; *raster_buffer_provider = base::MakeUnique( compositor_context_provider, worker_context_provider, resource_provider_.get(), settings_.use_distance_field_text, msaa_sample_count, settings_.async_worker_context_enabled); return; } bool use_zero_copy = settings_.use_zero_copy; // TODO(reveman): Remove this when mojo supports worker contexts. // crbug.com/522440 if (!use_zero_copy && !worker_context_provider) { LOG(ERROR) << "Forcing zero-copy tile initialization as worker context is missing"; use_zero_copy = true; } if (use_zero_copy) { *resource_pool = ResourcePool::CreateForGpuMemoryBufferResources( resource_provider_.get(), GetTaskRunner(), gfx::BufferUsage::GPU_READ_CPU_READ_WRITE, ResourcePool::kDefaultExpirationDelay); *raster_buffer_provider = ZeroCopyRasterBufferProvider::Create( resource_provider_.get(), settings_.renderer_settings.preferred_tile_format); return; } *resource_pool = ResourcePool::Create(resource_provider_.get(), GetTaskRunner(), ResourcePool::kDefaultExpirationDelay); const int max_copy_texture_chromium_size = compositor_context_provider->ContextCapabilities() .max_copy_texture_chromium_size; *raster_buffer_provider = base::MakeUnique( GetTaskRunner(), compositor_context_provider, worker_context_provider, resource_provider_.get(), max_copy_texture_chromium_size, settings_.use_partial_raster, settings_.max_staging_buffer_usage_in_bytes, settings_.renderer_settings.preferred_tile_format, settings_.async_worker_context_enabled); } void LayerTreeHostImpl::SetLayerTreeMutator( std::unique_ptr mutator) { if (mutator == mutator_) return; TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("compositor-worker"), "LayerTreeHostImpl::SetLayerTreeMutator"); mutator_ = std::move(mutator); mutator_->SetClient(this); } LayerImpl* LayerTreeHostImpl::ViewportMainScrollLayer() { return viewport()->MainScrollLayer(); } void LayerTreeHostImpl::DidChangeScrollbarVisibility() { client_->SetNeedsCommitOnImplThread(); } void LayerTreeHostImpl::CleanUpTileManagerAndUIResources() { ClearUIResources(); tile_manager_.FinishTasksAndCleanUp(); resource_pool_ = nullptr; single_thread_synchronous_task_graph_runner_ = nullptr; image_decode_controller_ = nullptr; // We've potentially just freed a large number of resources on our various // contexts. Flushing now helps ensure these are cleaned up quickly // preventing driver cache growth. See crbug.com/643251 if (compositor_frame_sink_) { if (auto* compositor_context = compositor_frame_sink_->context_provider()) compositor_context->ContextGL()->ShallowFlushCHROMIUM(); if (auto* worker_context = compositor_frame_sink_->worker_context_provider()) { ContextProvider::ScopedContextLock hold(worker_context); worker_context->ContextGL()->ShallowFlushCHROMIUM(); } } } void LayerTreeHostImpl::ReleaseCompositorFrameSink() { TRACE_EVENT0("cc", "LayerTreeHostImpl::ReleaseCompositorFrameSink"); if (!compositor_frame_sink_) { DCHECK(!has_valid_compositor_frame_sink_); return; } has_valid_compositor_frame_sink_ = false; // Since we will create a new resource provider, we cannot continue to use // the old resources (i.e. render_surfaces and texture IDs). Clear them // before we destroy the old resource provider. ReleaseTreeResources(); // Note: ui resource cleanup uses the |resource_provider_|. CleanUpTileManagerAndUIResources(); resource_provider_ = nullptr; // Release any context visibility before we destroy the CompositorFrameSink. SetContextVisibility(false); // Detach from the old CompositorFrameSink and reset |compositor_frame_sink_| // pointer as this surface is going to be destroyed independent of if binding // the new CompositorFrameSink succeeds or not. compositor_frame_sink_->DetachFromClient(); compositor_frame_sink_ = nullptr; // We don't know if the next CompositorFrameSink will support GPU // rasterization. Make sure to clear the flag so that we force a // re-computation. use_gpu_rasterization_ = false; } bool LayerTreeHostImpl::InitializeRenderer( CompositorFrameSink* compositor_frame_sink) { TRACE_EVENT0("cc", "LayerTreeHostImpl::InitializeRenderer"); ReleaseCompositorFrameSink(); if (!compositor_frame_sink->BindToClient(this)) { // Avoid recreating tree resources because we might not have enough // information to do this yet (eg. we don't have a TileManager at this // point). return false; } // When using software compositing, change to the limits specified for it. // Since this is a one way trip, we don't need to worry about going back to // GPU compositing. if (!compositor_frame_sink->context_provider()) SetMemoryPolicy(settings_.software_memory_policy); compositor_frame_sink_ = compositor_frame_sink; has_valid_compositor_frame_sink_ = true; resource_provider_ = base::MakeUnique( compositor_frame_sink_->context_provider(), compositor_frame_sink_->shared_bitmap_manager(), compositor_frame_sink_->gpu_memory_buffer_manager(), task_runner_provider_->blocking_main_thread_task_runner(), settings_.renderer_settings.highp_threshold_min, settings_.renderer_settings.texture_id_allocation_chunk_size, compositor_frame_sink_->capabilities().delegated_sync_points_required, settings_.renderer_settings.use_gpu_memory_buffer_resources, settings_.enable_color_correct_rendering, settings_.renderer_settings.buffer_to_texture_target_map); // Since the new context may be capable of MSAA, update status here. We don't // need to check the return value since we are recreating all resources // already. UpdateGpuRasterizationStatus(); // See note in LayerTreeImpl::UpdateDrawProperties, new CompositorFrameSink // means a new max texture size which affects draw properties. Also, if the // draw properties were up to date, layers still lost resources and we need to // UpdateDrawProperties() after calling RecreateTreeResources(). active_tree_->set_needs_update_draw_properties(); if (pending_tree_) pending_tree_->set_needs_update_draw_properties(); CreateTileManagerResources(); RecreateTileResources(); client_->OnCanDrawStateChanged(CanDraw()); SetFullViewportDamage(); // There will not be anything to draw here, so set high res // to avoid checkerboards, typically when we are recovering // from lost context. // TODO(crbug.com/469175): Replace with RequiresHighResToDraw. SetRequiresHighResToDraw(); return true; } void LayerTreeHostImpl::SetBeginFrameSource(BeginFrameSource* source) { client_->SetBeginFrameSource(source); } void LayerTreeHostImpl::SetViewportSize(const gfx::Size& device_viewport_size) { if (device_viewport_size == device_viewport_size_) return; TRACE_EVENT_INSTANT2("cc", "LayerTreeHostImpl::SetViewportSize", TRACE_EVENT_SCOPE_THREAD, "width", device_viewport_size.width(), "height", device_viewport_size.height()); if (pending_tree_) active_tree_->SetViewportSizeInvalid(); device_viewport_size_ = device_viewport_size; UpdateViewportContainerSizes(); client_->OnCanDrawStateChanged(CanDraw()); SetFullViewportDamage(); active_tree_->set_needs_update_draw_properties(); } const gfx::Rect LayerTreeHostImpl::ViewportRectForTilePriority() const { if (viewport_rect_for_tile_priority_.IsEmpty()) return DeviceViewport(); return viewport_rect_for_tile_priority_; } gfx::Size LayerTreeHostImpl::DrawViewportSize() const { return DeviceViewport().size(); } gfx::Rect LayerTreeHostImpl::DeviceViewport() const { if (external_viewport_.IsEmpty()) return gfx::Rect(device_viewport_size_); return external_viewport_; } const gfx::Transform& LayerTreeHostImpl::DrawTransform() const { return external_transform_; } void LayerTreeHostImpl::DidChangeBrowserControlsPosition() { UpdateViewportContainerSizes(); SetNeedsRedraw(); SetNeedsOneBeginImplFrame(); active_tree_->set_needs_update_draw_properties(); SetFullViewportDamage(); } float LayerTreeHostImpl::TopControlsHeight() const { return active_tree_->top_controls_height(); } float LayerTreeHostImpl::BottomControlsHeight() const { return active_tree_->bottom_controls_height(); } void LayerTreeHostImpl::SetCurrentBrowserControlsShownRatio(float ratio) { if (active_tree_->SetCurrentBrowserControlsShownRatio(ratio)) DidChangeBrowserControlsPosition(); } float LayerTreeHostImpl::CurrentBrowserControlsShownRatio() const { return active_tree_->CurrentBrowserControlsShownRatio(); } void LayerTreeHostImpl::BindToClient(InputHandlerClient* client) { DCHECK(input_handler_client_ == NULL); input_handler_client_ = client; } InputHandler::ScrollStatus LayerTreeHostImpl::TryScroll( const gfx::PointF& screen_space_point, InputHandler::ScrollInputType type, const ScrollTree& scroll_tree, ScrollNode* scroll_node) const { InputHandler::ScrollStatus scroll_status; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNotScrollingOnMain; if (!!scroll_node->main_thread_scrolling_reasons) { TRACE_EVENT0("cc", "LayerImpl::TryScroll: Failed ShouldScrollOnMainThread"); scroll_status.thread = InputHandler::SCROLL_ON_MAIN_THREAD; scroll_status.main_thread_scrolling_reasons = scroll_node->main_thread_scrolling_reasons; return scroll_status; } gfx::Transform screen_space_transform = scroll_tree.ScreenSpaceTransform(scroll_node->id); if (!screen_space_transform.IsInvertible()) { TRACE_EVENT0("cc", "LayerImpl::TryScroll: Ignored NonInvertibleTransform"); scroll_status.thread = InputHandler::SCROLL_IGNORED; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNonInvertibleTransform; return scroll_status; } if (scroll_node->contains_non_fast_scrollable_region) { bool clipped = false; gfx::Transform inverse_screen_space_transform( gfx::Transform::kSkipInitialization); if (!screen_space_transform.GetInverse(&inverse_screen_space_transform)) { // TODO(shawnsingh): We shouldn't be applying a projection if screen space // transform is uninvertible here. Perhaps we should be returning // SCROLL_ON_MAIN_THREAD in this case? } gfx::PointF hit_test_point_in_layer_space = MathUtil::ProjectPoint( inverse_screen_space_transform, screen_space_point, &clipped); if (!clipped && active_tree() ->LayerById(scroll_node->owner_id) ->non_fast_scrollable_region() .Contains(gfx::ToRoundedPoint(hit_test_point_in_layer_space))) { TRACE_EVENT0("cc", "LayerImpl::tryScroll: Failed NonFastScrollableRegion"); scroll_status.thread = InputHandler::SCROLL_ON_MAIN_THREAD; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNonFastScrollableRegion; return scroll_status; } } if (!scroll_node->scrollable) { TRACE_EVENT0("cc", "LayerImpl::tryScroll: Ignored not scrollable"); scroll_status.thread = InputHandler::SCROLL_IGNORED; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNotScrollable; return scroll_status; } gfx::ScrollOffset max_scroll_offset = scroll_tree.MaxScrollOffset(scroll_node->id); if (max_scroll_offset.x() <= 0 && max_scroll_offset.y() <= 0) { TRACE_EVENT0("cc", "LayerImpl::tryScroll: Ignored. Technically scrollable," " but has no affordance in either direction."); scroll_status.thread = InputHandler::SCROLL_IGNORED; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNotScrollable; return scroll_status; } scroll_status.thread = InputHandler::SCROLL_ON_IMPL_THREAD; return scroll_status; } static bool IsMainThreadScrolling(const InputHandler::ScrollStatus& status, const ScrollNode* scroll_node) { if (status.thread == InputHandler::SCROLL_ON_MAIN_THREAD) { if (!!scroll_node->main_thread_scrolling_reasons) { DCHECK(MainThreadScrollingReason::MainThreadCanSetScrollReasons( status.main_thread_scrolling_reasons)); } else { DCHECK(MainThreadScrollingReason::CompositorCanSetScrollReasons( status.main_thread_scrolling_reasons)); } return true; } return false; } LayerImpl* LayerTreeHostImpl::FindScrollLayerForDeviceViewportPoint( const gfx::PointF& device_viewport_point, InputHandler::ScrollInputType type, LayerImpl* layer_impl, bool* scroll_on_main_thread, uint32_t* main_thread_scrolling_reasons) const { DCHECK(scroll_on_main_thread); DCHECK(main_thread_scrolling_reasons); *main_thread_scrolling_reasons = MainThreadScrollingReason::kNotScrollingOnMain; // Walk up the hierarchy and look for a scrollable layer. ScrollTree& scroll_tree = active_tree_->property_trees()->scroll_tree; LayerImpl* potentially_scrolling_layer_impl = NULL; if (layer_impl) { ScrollNode* scroll_node = scroll_tree.Node(layer_impl->scroll_tree_index()); for (; scroll_tree.parent(scroll_node); scroll_node = scroll_tree.parent(scroll_node)) { // The content layer can also block attempts to scroll outside the main // thread. ScrollStatus status = TryScroll(device_viewport_point, type, scroll_tree, scroll_node); if (IsMainThreadScrolling(status, scroll_node)) { *scroll_on_main_thread = true; *main_thread_scrolling_reasons = status.main_thread_scrolling_reasons; return NULL; } if (status.thread == InputHandler::SCROLL_ON_IMPL_THREAD && !potentially_scrolling_layer_impl) { potentially_scrolling_layer_impl = active_tree_->LayerById(scroll_node->owner_id); } } } // Falling back to the viewport layer ensures generation of root overscroll // notifications. We use the viewport's main scroll layer to represent the // viewport in scrolling code. if (!potentially_scrolling_layer_impl || potentially_scrolling_layer_impl == OuterViewportScrollLayer() || potentially_scrolling_layer_impl == InnerViewportScrollLayer()) { potentially_scrolling_layer_impl = viewport()->MainScrollLayer(); } if (potentially_scrolling_layer_impl) { // Ensure that final layer scrolls on impl thread (crbug.com/625100) ScrollNode* scroll_node = scroll_tree.Node(potentially_scrolling_layer_impl->scroll_tree_index()); ScrollStatus status = TryScroll(device_viewport_point, type, scroll_tree, scroll_node); if (IsMainThreadScrolling(status, scroll_node)) { *scroll_on_main_thread = true; *main_thread_scrolling_reasons = status.main_thread_scrolling_reasons; return NULL; } } return potentially_scrolling_layer_impl; } // Similar to LayerImpl::HasAncestor, but walks up the scroll parents. static bool HasScrollAncestor(LayerImpl* child, LayerImpl* scroll_ancestor) { DCHECK(scroll_ancestor); if (!child) return false; ScrollTree& scroll_tree = child->layer_tree_impl()->property_trees()->scroll_tree; ScrollNode* scroll_node = scroll_tree.Node(child->scroll_tree_index()); for (; scroll_tree.parent(scroll_node); scroll_node = scroll_tree.parent(scroll_node)) { if (scroll_node->scrollable) return scroll_node->owner_id == scroll_ancestor->id(); } return false; } InputHandler::ScrollStatus LayerTreeHostImpl::ScrollBeginImpl( ScrollState* scroll_state, LayerImpl* scrolling_layer_impl, InputHandler::ScrollInputType type) { DCHECK(scroll_state); DCHECK(scroll_state->delta_x() == 0 && scroll_state->delta_y() == 0); InputHandler::ScrollStatus scroll_status; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNotScrollingOnMain; if (!scrolling_layer_impl) { scroll_status.thread = SCROLL_IGNORED; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNoScrollingLayer; return scroll_status; } scroll_status.thread = SCROLL_ON_IMPL_THREAD; ScrollAnimationAbort(scrolling_layer_impl); browser_controls_offset_manager_->ScrollBegin(); active_tree_->SetCurrentlyScrollingLayer(scrolling_layer_impl); // TODO(majidvp): get rid of wheel_scrolling_ and set is_direct_manipulation // in input_handler_proxy instead. wheel_scrolling_ = IsWheelBasedScroll(type); scroll_state->set_is_direct_manipulation(!wheel_scrolling_); // Invoke |DistributeScrollDelta| even with zero delta and velocity to ensure // scroll customization callbacks are invoked. DistributeScrollDelta(scroll_state); client_->RenewTreePriority(); RecordCompositorSlowScrollMetric(type, CC_THREAD); return scroll_status; } InputHandler::ScrollStatus LayerTreeHostImpl::RootScrollBegin( ScrollState* scroll_state, InputHandler::ScrollInputType type) { TRACE_EVENT0("cc", "LayerTreeHostImpl::RootScrollBegin"); ClearCurrentlyScrollingLayer(); DCHECK(viewport()); return ScrollBeginImpl(scroll_state, viewport()->MainScrollLayer(), type); } InputHandler::ScrollStatus LayerTreeHostImpl::ScrollBegin( ScrollState* scroll_state, InputHandler::ScrollInputType type) { ScrollStatus scroll_status; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNotScrollingOnMain; TRACE_EVENT0("cc", "LayerTreeHostImpl::ScrollBegin"); ClearCurrentlyScrollingLayer(); gfx::Point viewport_point(scroll_state->position_x(), scroll_state->position_y()); gfx::PointF device_viewport_point = gfx::ScalePoint( gfx::PointF(viewport_point), active_tree_->device_scale_factor()); LayerImpl* layer_impl = active_tree_->FindLayerThatIsHitByPoint(device_viewport_point); if (layer_impl) { LayerImpl* scroll_layer_impl = active_tree_->FindFirstScrollingLayerOrScrollbarLayerThatIsHitByPoint( device_viewport_point); if (scroll_layer_impl && !HasScrollAncestor(layer_impl, scroll_layer_impl)) { scroll_status.thread = SCROLL_UNKNOWN; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kFailedHitTest; return scroll_status; } } bool scroll_on_main_thread = false; LayerImpl* scrolling_layer_impl = FindScrollLayerForDeviceViewportPoint( device_viewport_point, type, layer_impl, &scroll_on_main_thread, &scroll_status.main_thread_scrolling_reasons); if (scrolling_layer_impl) scroll_affects_scroll_handler_ = scrolling_layer_impl->layer_tree_impl()->have_scroll_event_handlers(); if (scroll_on_main_thread) { RecordCompositorSlowScrollMetric(type, MAIN_THREAD); scroll_status.thread = SCROLL_ON_MAIN_THREAD; return scroll_status; } return ScrollBeginImpl(scroll_state, scrolling_layer_impl, type); } InputHandler::ScrollStatus LayerTreeHostImpl::ScrollAnimatedBegin( const gfx::Point& viewport_point) { InputHandler::ScrollStatus scroll_status; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNotScrollingOnMain; ScrollTree& scroll_tree = active_tree_->property_trees()->scroll_tree; ScrollNode* scroll_node = scroll_tree.CurrentlyScrollingNode(); if (scroll_node) { gfx::Vector2dF delta; if (ScrollAnimationUpdateTarget(scroll_node, delta, base::TimeDelta())) { scroll_status.thread = SCROLL_ON_IMPL_THREAD; } else { scroll_status.thread = SCROLL_IGNORED; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNotScrollable; } return scroll_status; } ScrollStateData scroll_state_data; scroll_state_data.position_x = viewport_point.x(); scroll_state_data.position_y = viewport_point.y(); ScrollState scroll_state(scroll_state_data); // ScrollAnimated is used for animated wheel scrolls. We find the first layer // that can scroll and set up an animation of its scroll offset. Note that // this does not currently go through the scroll customization machinery // that ScrollBy uses for non-animated wheel scrolls. scroll_status = ScrollBegin(&scroll_state, WHEEL); scroll_node = scroll_tree.CurrentlyScrollingNode(); if (scroll_status.thread == SCROLL_ON_IMPL_THREAD) { ScrollStateData scroll_state_end_data; scroll_state_end_data.is_ending = true; ScrollState scroll_state_end(scroll_state_end_data); // TODO(Sahel): Once the touchpad scroll latching for Non-mac devices is // implemented, the current scrolling layer should not get cleared after // each animation (crbug.com/526463). ScrollEnd(&scroll_state_end); ClearCurrentlyScrollingLayer(); } return scroll_status; } gfx::Vector2dF LayerTreeHostImpl::ComputeScrollDelta( ScrollNode* scroll_node, const gfx::Vector2dF& delta) { ScrollTree& scroll_tree = active_tree()->property_trees()->scroll_tree; float scale_factor = active_tree()->current_page_scale_factor(); gfx::Vector2dF adjusted_scroll(delta); adjusted_scroll.Scale(1.f / scale_factor); if (!scroll_node->user_scrollable_horizontal) adjusted_scroll.set_x(0); if (!scroll_node->user_scrollable_vertical) adjusted_scroll.set_y(0); gfx::ScrollOffset old_offset = scroll_tree.current_scroll_offset(scroll_node->owner_id); gfx::ScrollOffset new_offset = scroll_tree.ClampScrollOffsetToLimits( old_offset + gfx::ScrollOffset(adjusted_scroll), scroll_node); gfx::ScrollOffset scrolled = new_offset - old_offset; return gfx::Vector2dF(scrolled.x(), scrolled.y()); } bool LayerTreeHostImpl::ScrollAnimationCreate(ScrollNode* scroll_node, const gfx::Vector2dF& delta, base::TimeDelta delayed_by) { ScrollTree& scroll_tree = active_tree_->property_trees()->scroll_tree; const float kEpsilon = 0.1f; bool scroll_animated = (std::abs(delta.x()) > kEpsilon || std::abs(delta.y()) > kEpsilon); if (!scroll_animated) { scroll_tree.ScrollBy(scroll_node, delta, active_tree()); return false; } scroll_tree.set_currently_scrolling_node(scroll_node->id); gfx::ScrollOffset current_offset = scroll_tree.current_scroll_offset(scroll_node->owner_id); gfx::ScrollOffset target_offset = scroll_tree.ClampScrollOffsetToLimits( current_offset + gfx::ScrollOffset(delta), scroll_node); DCHECK_EQ( ElementId(active_tree()->LayerById(scroll_node->owner_id)->element_id()), scroll_node->element_id); mutator_host_->ImplOnlyScrollAnimationCreate( scroll_node->element_id, target_offset, current_offset, delayed_by); SetNeedsOneBeginImplFrame(); return true; } InputHandler::ScrollStatus LayerTreeHostImpl::ScrollAnimated( const gfx::Point& viewport_point, const gfx::Vector2dF& scroll_delta, base::TimeDelta delayed_by) { InputHandler::ScrollStatus scroll_status; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNotScrollingOnMain; ScrollTree& scroll_tree = active_tree_->property_trees()->scroll_tree; ScrollNode* scroll_node = scroll_tree.CurrentlyScrollingNode(); if (scroll_node) { gfx::Vector2dF delta = scroll_delta; if (!scroll_node->user_scrollable_horizontal) delta.set_x(0); if (!scroll_node->user_scrollable_vertical) delta.set_y(0); if (ScrollAnimationUpdateTarget(scroll_node, delta, delayed_by)) { scroll_status.thread = SCROLL_ON_IMPL_THREAD; } else { scroll_status.thread = SCROLL_IGNORED; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNotScrollable; } return scroll_status; } ScrollStateData scroll_state_data; scroll_state_data.position_x = viewport_point.x(); scroll_state_data.position_y = viewport_point.y(); scroll_state_data.is_in_inertial_phase = true; ScrollState scroll_state(scroll_state_data); // ScrollAnimated is used for animated wheel scrolls. We find the first layer // that can scroll and set up an animation of its scroll offset. Note that // this does not currently go through the scroll customization machinery // that ScrollBy uses for non-animated wheel scrolls. scroll_status = ScrollBegin(&scroll_state, WHEEL); scroll_node = scroll_tree.CurrentlyScrollingNode(); if (scroll_status.thread == SCROLL_ON_IMPL_THREAD) { gfx::Vector2dF pending_delta = scroll_delta; if (scroll_node) { for (; scroll_tree.parent(scroll_node); scroll_node = scroll_tree.parent(scroll_node)) { if (!scroll_node->scrollable) continue; if (viewport()->MainScrollLayer() && scroll_node->owner_id == viewport()->MainScrollLayer()->id()) { gfx::Vector2dF scrolled = viewport()->ScrollAnimated(pending_delta, delayed_by); // Viewport::ScrollAnimated returns pending_delta as long as it // starts an animation. if (scrolled == pending_delta) return scroll_status; break; } gfx::Vector2dF scroll_delta = ComputeScrollDelta(scroll_node, pending_delta); if (ScrollAnimationCreate(scroll_node, scroll_delta, delayed_by)) return scroll_status; pending_delta -= scroll_delta; } } } scroll_state.set_is_ending(true); ScrollEnd(&scroll_state); return scroll_status; } gfx::Vector2dF LayerTreeHostImpl::ScrollNodeWithViewportSpaceDelta( ScrollNode* scroll_node, const gfx::PointF& viewport_point, const gfx::Vector2dF& viewport_delta, ScrollTree* scroll_tree) { // Layers with non-invertible screen space transforms should not have passed // the scroll hit test in the first place. const gfx::Transform screen_space_transform = scroll_tree->ScreenSpaceTransform(scroll_node->id); DCHECK(screen_space_transform.IsInvertible()); gfx::Transform inverse_screen_space_transform( gfx::Transform::kSkipInitialization); bool did_invert = screen_space_transform.GetInverse(&inverse_screen_space_transform); // TODO(shawnsingh): With the advent of impl-side scrolling for non-root // layers, we may need to explicitly handle uninvertible transforms here. DCHECK(did_invert); float scale_from_viewport_to_screen_space = active_tree_->device_scale_factor(); gfx::PointF screen_space_point = gfx::ScalePoint(viewport_point, scale_from_viewport_to_screen_space); gfx::Vector2dF screen_space_delta = viewport_delta; screen_space_delta.Scale(scale_from_viewport_to_screen_space); // First project the scroll start and end points to local layer space to find // the scroll delta in layer coordinates. bool start_clipped, end_clipped; gfx::PointF screen_space_end_point = screen_space_point + screen_space_delta; gfx::PointF local_start_point = MathUtil::ProjectPoint( inverse_screen_space_transform, screen_space_point, &start_clipped); gfx::PointF local_end_point = MathUtil::ProjectPoint( inverse_screen_space_transform, screen_space_end_point, &end_clipped); // In general scroll point coordinates should not get clipped. DCHECK(!start_clipped); DCHECK(!end_clipped); if (start_clipped || end_clipped) return gfx::Vector2dF(); // Apply the scroll delta. gfx::ScrollOffset previous_offset = scroll_tree->current_scroll_offset(scroll_node->owner_id); scroll_tree->ScrollBy(scroll_node, local_end_point - local_start_point, active_tree()); gfx::ScrollOffset scrolled = scroll_tree->current_scroll_offset(scroll_node->owner_id) - previous_offset; // Get the end point in the layer's content space so we can apply its // ScreenSpaceTransform. gfx::PointF actual_local_end_point = local_start_point + gfx::Vector2dF(scrolled.x(), scrolled.y()); // Calculate the applied scroll delta in viewport space coordinates. gfx::PointF actual_screen_space_end_point = MathUtil::MapPoint( screen_space_transform, actual_local_end_point, &end_clipped); DCHECK(!end_clipped); if (end_clipped) return gfx::Vector2dF(); gfx::PointF actual_viewport_end_point = gfx::ScalePoint( actual_screen_space_end_point, 1.f / scale_from_viewport_to_screen_space); return actual_viewport_end_point - viewport_point; } static gfx::Vector2dF ScrollNodeWithLocalDelta( ScrollNode* scroll_node, const gfx::Vector2dF& local_delta, float page_scale_factor, LayerTreeImpl* layer_tree_impl) { ScrollTree& scroll_tree = layer_tree_impl->property_trees()->scroll_tree; gfx::ScrollOffset previous_offset = scroll_tree.current_scroll_offset(scroll_node->owner_id); gfx::Vector2dF delta = local_delta; delta.Scale(1.f / page_scale_factor); scroll_tree.ScrollBy(scroll_node, delta, layer_tree_impl); gfx::ScrollOffset scrolled = scroll_tree.current_scroll_offset(scroll_node->owner_id) - previous_offset; gfx::Vector2dF consumed_scroll(scrolled.x(), scrolled.y()); consumed_scroll.Scale(page_scale_factor); return consumed_scroll; } // TODO(danakj): Make this into two functions, one with delta, one with // viewport_point, no bool required. gfx::Vector2dF LayerTreeHostImpl::ScrollSingleNode( ScrollNode* scroll_node, const gfx::Vector2dF& delta, const gfx::Point& viewport_point, bool is_direct_manipulation, ScrollTree* scroll_tree) { // Events representing direct manipulation of the screen (such as gesture // events) need to be transformed from viewport coordinates to local layer // coordinates so that the scrolling contents exactly follow the user's // finger. In contrast, events not representing direct manipulation of the // screen (such as wheel events) represent a fixed amount of scrolling so we // can just apply them directly, but the page scale factor is applied to the // scroll delta. if (is_direct_manipulation) { return ScrollNodeWithViewportSpaceDelta( scroll_node, gfx::PointF(viewport_point), delta, scroll_tree); } float scale_factor = active_tree()->current_page_scale_factor(); return ScrollNodeWithLocalDelta(scroll_node, delta, scale_factor, active_tree()); } void LayerTreeHostImpl::ApplyScroll(ScrollNode* scroll_node, ScrollState* scroll_state) { DCHECK(scroll_state); gfx::Point viewport_point(scroll_state->position_x(), scroll_state->position_y()); const gfx::Vector2dF delta(scroll_state->delta_x(), scroll_state->delta_y()); gfx::Vector2dF applied_delta; gfx::Vector2dF delta_applied_to_content; // TODO(tdresser): Use a more rational epsilon. See crbug.com/510550 for // details. const float kEpsilon = 0.1f; bool is_viewport_scroll_layer = viewport()->MainScrollLayer() && scroll_node->owner_id == viewport()->MainScrollLayer()->id(); // This is needed if the scroll chains up to the viewport without going // through the outer viewport scroll layer. This can happen if we scroll an // element that's not a descendant of the document.rootScroller. In that case // we want to scroll the inner viewport -- to allow panning while zoomed -- // but also move browser controls if needed. bool is_inner_viewport_scroll_layer = scroll_node->owner_id == InnerViewportScrollLayer()->id(); if (is_viewport_scroll_layer || is_inner_viewport_scroll_layer) { Viewport::ScrollResult result = viewport()->ScrollBy( delta, viewport_point, scroll_state->is_direct_manipulation(), !wheel_scrolling_, is_viewport_scroll_layer); applied_delta = result.consumed_delta; delta_applied_to_content = result.content_scrolled_delta; } else { applied_delta = ScrollSingleNode( scroll_node, delta, viewport_point, scroll_state->is_direct_manipulation(), &scroll_state->layer_tree_impl()->property_trees()->scroll_tree); } // If the layer wasn't able to move, try the next one in the hierarchy. bool scrolled = std::abs(applied_delta.x()) > kEpsilon; scrolled = scrolled || std::abs(applied_delta.y()) > kEpsilon; if (!scrolled) { // TODO(bokan): This preserves existing behavior by not allowing tiny // scrolls to produce overscroll but is inconsistent in how delta gets // chained up. We need to clean this up. if (is_viewport_scroll_layer) scroll_state->ConsumeDelta(applied_delta.x(), applied_delta.y()); return; } if (!is_viewport_scroll_layer && !is_inner_viewport_scroll_layer) { // If the applied delta is within 45 degrees of the input // delta, bail out to make it easier to scroll just one layer // in one direction without affecting any of its parents. float angle_threshold = 45; if (MathUtil::SmallestAngleBetweenVectors(applied_delta, delta) < angle_threshold) { applied_delta = delta; } else { // Allow further movement only on an axis perpendicular to the direction // in which the layer moved. applied_delta = MathUtil::ProjectVector(delta, applied_delta); } delta_applied_to_content = applied_delta; } scroll_state->set_caused_scroll( std::abs(delta_applied_to_content.x()) > kEpsilon, std::abs(delta_applied_to_content.y()) > kEpsilon); scroll_state->ConsumeDelta(applied_delta.x(), applied_delta.y()); scroll_state->set_current_native_scrolling_node(scroll_node); } void LayerTreeHostImpl::DistributeScrollDelta(ScrollState* scroll_state) { // TODO(majidvp): in Blink we compute scroll chain only at scroll begin which // is not the case here. We eventually want to have the same behaviour on both // sides but it may become a non issue if we get rid of scroll chaining (see // crbug.com/526462) std::list current_scroll_chain; ScrollTree& scroll_tree = active_tree_->property_trees()->scroll_tree; ScrollNode* scroll_node = scroll_tree.CurrentlyScrollingNode(); ScrollNode* viewport_scroll_node = viewport()->MainScrollLayer() ? scroll_tree.Node(viewport()->MainScrollLayer()->scroll_tree_index()) : nullptr; if (scroll_node) { // TODO(bokan): The loop checks for a null parent but don't we still want to // distribute to the root scroll node? for (; scroll_tree.parent(scroll_node); scroll_node = scroll_tree.parent(scroll_node)) { if (scroll_node == viewport_scroll_node) { // Don't chain scrolls past the outer viewport scroll layer. Once we // reach that, we should scroll the viewport which is represented by the // main viewport scroll layer. DCHECK(viewport_scroll_node); current_scroll_chain.push_front(viewport_scroll_node); break; } if (!scroll_node->scrollable) continue; current_scroll_chain.push_front(scroll_node); } } scroll_state->set_scroll_chain_and_layer_tree(current_scroll_chain, active_tree()); scroll_state->DistributeToScrollChainDescendant(); } InputHandlerScrollResult LayerTreeHostImpl::ScrollBy( ScrollState* scroll_state) { DCHECK(scroll_state); TRACE_EVENT0("cc", "LayerTreeHostImpl::ScrollBy"); if (!CurrentlyScrollingLayer()) return InputHandlerScrollResult(); float initial_top_controls_offset = browser_controls_offset_manager_->ControlsTopOffset(); scroll_state->set_delta_consumed_for_scroll_sequence( did_lock_scrolling_layer_); scroll_state->set_is_direct_manipulation(!wheel_scrolling_); scroll_state->set_current_native_scrolling_node( active_tree()->property_trees()->scroll_tree.CurrentlyScrollingNode()); DistributeScrollDelta(scroll_state); active_tree_->SetCurrentlyScrollingLayer(active_tree_->LayerById( scroll_state->current_native_scrolling_node()->owner_id)); did_lock_scrolling_layer_ = scroll_state->delta_consumed_for_scroll_sequence(); bool did_scroll_x = scroll_state->caused_scroll_x(); bool did_scroll_y = scroll_state->caused_scroll_y(); bool did_scroll_content = did_scroll_x || did_scroll_y; if (did_scroll_content) { // If we are scrolling with an active scroll handler, forward latency // tracking information to the main thread so the delay introduced by the // handler is accounted for. if (scroll_affects_scroll_handler()) NotifySwapPromiseMonitorsOfForwardingToMainThread(); client_->SetNeedsCommitOnImplThread(); SetNeedsRedraw(); client_->RenewTreePriority(); } // Scrolling along an axis resets accumulated root overscroll for that axis. if (did_scroll_x) accumulated_root_overscroll_.set_x(0); if (did_scroll_y) accumulated_root_overscroll_.set_y(0); gfx::Vector2dF unused_root_delta(scroll_state->delta_x(), scroll_state->delta_y()); // When inner viewport is unscrollable, disable overscrolls. if (InnerViewportScrollLayer()) { if (!InnerViewportScrollLayer()->user_scrollable_horizontal()) unused_root_delta.set_x(0); if (!InnerViewportScrollLayer()->user_scrollable_vertical()) unused_root_delta.set_y(0); } accumulated_root_overscroll_ += unused_root_delta; bool did_scroll_top_controls = initial_top_controls_offset != browser_controls_offset_manager_->ControlsTopOffset(); InputHandlerScrollResult scroll_result; scroll_result.did_scroll = did_scroll_content || did_scroll_top_controls; scroll_result.did_overscroll_root = !unused_root_delta.IsZero(); scroll_result.accumulated_root_overscroll = accumulated_root_overscroll_; scroll_result.unused_scroll_delta = unused_root_delta; if (scroll_result.did_scroll) { // Scrolling can change the root scroll offset, so inform the synchronous // input handler. UpdateRootLayerStateForSynchronousInputHandler(); } // Update compositor worker mutations which may respond to scrolling. Mutate(CurrentBeginFrameArgs().frame_time); return scroll_result; } void LayerTreeHostImpl::RequestUpdateForSynchronousInputHandler() { UpdateRootLayerStateForSynchronousInputHandler(); } void LayerTreeHostImpl::SetSynchronousInputHandlerRootScrollOffset( const gfx::ScrollOffset& root_offset) { bool changed = active_tree_->DistributeRootScrollOffset(root_offset); if (!changed) return; client_->SetNeedsCommitOnImplThread(); // After applying the synchronous input handler's scroll offset, tell it what // we ended up with. UpdateRootLayerStateForSynchronousInputHandler(); SetFullViewportDamage(); SetNeedsRedraw(); } void LayerTreeHostImpl::ClearCurrentlyScrollingLayer() { active_tree_->ClearCurrentlyScrollingLayer(); did_lock_scrolling_layer_ = false; scroll_affects_scroll_handler_ = false; accumulated_root_overscroll_ = gfx::Vector2dF(); } void LayerTreeHostImpl::ScrollEnd(ScrollState* scroll_state) { DCHECK(scroll_state); DCHECK(scroll_state->delta_x() == 0 && scroll_state->delta_y() == 0); DistributeScrollDelta(scroll_state); browser_controls_offset_manager_->ScrollEnd(); ClearCurrentlyScrollingLayer(); } InputHandler::ScrollStatus LayerTreeHostImpl::FlingScrollBegin() { InputHandler::ScrollStatus scroll_status; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNotScrollingOnMain; if (!CurrentlyScrollingLayer()) { scroll_status.thread = SCROLL_IGNORED; scroll_status.main_thread_scrolling_reasons = MainThreadScrollingReason::kNoScrollingLayer; } else { scroll_status.thread = SCROLL_ON_IMPL_THREAD; } return scroll_status; } float LayerTreeHostImpl::DeviceSpaceDistanceToLayer( const gfx::PointF& device_viewport_point, LayerImpl* layer_impl) { if (!layer_impl) return std::numeric_limits::max(); gfx::Rect layer_impl_bounds(layer_impl->bounds()); gfx::RectF device_viewport_layer_impl_bounds = MathUtil::MapClippedRect( layer_impl->ScreenSpaceTransform(), gfx::RectF(layer_impl_bounds)); return device_viewport_layer_impl_bounds.ManhattanDistanceToPoint( device_viewport_point); } void LayerTreeHostImpl::MouseDown() { ScrollbarAnimationController* animation_controller = ScrollbarAnimationControllerForId(scroll_layer_id_mouse_currently_over_); if (animation_controller) animation_controller->DidMouseDown(); } void LayerTreeHostImpl::MouseUp() { ScrollbarAnimationController* animation_controller = ScrollbarAnimationControllerForId(scroll_layer_id_mouse_currently_over_); if (animation_controller) animation_controller->DidMouseUp(); } void LayerTreeHostImpl::MouseMoveAt(const gfx::Point& viewport_point) { float distance_to_scrollbar = std::numeric_limits::max(); gfx::PointF device_viewport_point = gfx::ScalePoint( gfx::PointF(viewport_point), active_tree_->device_scale_factor()); LayerImpl* layer_impl = active_tree_->FindLayerThatIsHitByPoint(device_viewport_point); // Check if mouse is over a scrollbar or not. // TODO(sahel): get rid of this extera checking when // FindScrollLayerForDeviceViewportPoint finds the proper layer for // scrolling on main thread, as well. int new_id = Layer::INVALID_ID; if (layer_impl && layer_impl->ToScrollbarLayer()) new_id = layer_impl->ToScrollbarLayer()->ScrollLayerId(); if (new_id != Layer::INVALID_ID) { // Mouse over a scrollbar. distance_to_scrollbar = 0; } else { bool scroll_on_main_thread = false; uint32_t main_thread_scrolling_reasons; LayerImpl* scroll_layer_impl = FindScrollLayerForDeviceViewportPoint( device_viewport_point, InputHandler::TOUCHSCREEN, layer_impl, &scroll_on_main_thread, &main_thread_scrolling_reasons); // Scrollbars for the viewport are registered with the outer viewport layer. if (scroll_layer_impl == InnerViewportScrollLayer()) scroll_layer_impl = OuterViewportScrollLayer(); new_id = scroll_layer_impl ? scroll_layer_impl->id() : Layer::INVALID_ID; } if (new_id != scroll_layer_id_mouse_currently_over_) { ScrollbarAnimationController* old_animation_controller = ScrollbarAnimationControllerForId( scroll_layer_id_mouse_currently_over_); if (old_animation_controller) { old_animation_controller->DidMouseLeave(); } scroll_layer_id_mouse_currently_over_ = new_id; } ScrollbarAnimationController* new_animation_controller = ScrollbarAnimationControllerForId(new_id); if (!new_animation_controller) return; for (ScrollbarLayerImplBase* scrollbar : ScrollbarsFor(new_id)) distance_to_scrollbar = std::min(distance_to_scrollbar, DeviceSpaceDistanceToLayer(device_viewport_point, scrollbar)); new_animation_controller->DidMouseMoveNear( distance_to_scrollbar / active_tree_->device_scale_factor()); } void LayerTreeHostImpl::MouseLeave() { for (auto& pair : scrollbar_animation_controllers_) pair.second->DidMouseLeave(); scroll_layer_id_mouse_currently_over_ = Layer::INVALID_ID; } void LayerTreeHostImpl::PinchGestureBegin() { pinch_gesture_active_ = true; client_->RenewTreePriority(); pinch_gesture_end_should_clear_scrolling_layer_ = !CurrentlyScrollingLayer(); active_tree_->SetCurrentlyScrollingLayer(viewport()->MainScrollLayer()); browser_controls_offset_manager_->PinchBegin(); } void LayerTreeHostImpl::PinchGestureUpdate(float magnify_delta, const gfx::Point& anchor) { TRACE_EVENT0("cc", "LayerTreeHostImpl::PinchGestureUpdate"); if (!InnerViewportScrollLayer()) return; viewport()->PinchUpdate(magnify_delta, anchor); client_->SetNeedsCommitOnImplThread(); SetNeedsRedraw(); client_->RenewTreePriority(); // Pinching can change the root scroll offset, so inform the synchronous input // handler. UpdateRootLayerStateForSynchronousInputHandler(); } void LayerTreeHostImpl::PinchGestureEnd() { pinch_gesture_active_ = false; if (pinch_gesture_end_should_clear_scrolling_layer_) { pinch_gesture_end_should_clear_scrolling_layer_ = false; ClearCurrentlyScrollingLayer(); } viewport()->PinchEnd(); browser_controls_offset_manager_->PinchEnd(); client_->SetNeedsCommitOnImplThread(); // When a pinch ends, we may be displaying content cached at incorrect scales, // so updating draw properties and drawing will ensure we are using the right // scales that we want when we're not inside a pinch. active_tree_->set_needs_update_draw_properties(); SetNeedsRedraw(); } std::unique_ptr LayerTreeHostImpl::ProcessLayerTreeMutations() { std::unique_ptr callbacks(new BeginFrameCallbackList); if (mutator_) { const base::Closure& callback = mutator_->TakeMutations(); if (!callback.is_null()) callbacks->push_back(callback); } return callbacks; } static void CollectScrollDeltas(ScrollAndScaleSet* scroll_info, LayerTreeImpl* tree_impl) { if (tree_impl->LayerListIsEmpty()) return; int inner_viewport_layer_id = tree_impl->InnerViewportScrollLayer() ? tree_impl->InnerViewportScrollLayer()->id() : Layer::INVALID_ID; tree_impl->property_trees()->scroll_tree.CollectScrollDeltas( scroll_info, inner_viewport_layer_id); } static void CollectScrollbarUpdates( ScrollAndScaleSet* scroll_info, std::unordered_map>* controllers) { scroll_info->scrollbars.reserve(controllers->size()); for (auto& pair : *controllers) { scroll_info->scrollbars.push_back(LayerTreeHostCommon::ScrollbarsUpdateInfo( pair.first, pair.second->ScrollbarsHidden())); } } std::unique_ptr LayerTreeHostImpl::ProcessScrollDeltas() { std::unique_ptr scroll_info(new ScrollAndScaleSet()); CollectScrollDeltas(scroll_info.get(), active_tree_.get()); CollectScrollbarUpdates(scroll_info.get(), &scrollbar_animation_controllers_); scroll_info->page_scale_delta = active_tree_->page_scale_factor()->PullDeltaForMainThread(); scroll_info->top_controls_delta = active_tree()->top_controls_shown_ratio()->PullDeltaForMainThread(); scroll_info->elastic_overscroll_delta = active_tree_->elastic_overscroll()->PullDeltaForMainThread(); scroll_info->swap_promises.swap(swap_promises_for_main_thread_scroll_update_); return scroll_info; } void LayerTreeHostImpl::SetFullViewportDamage() { SetViewportDamage(gfx::Rect(DrawViewportSize())); } bool LayerTreeHostImpl::AnimatePageScale(base::TimeTicks monotonic_time) { if (!page_scale_animation_) return false; gfx::ScrollOffset scroll_total = active_tree_->TotalScrollOffset(); if (!page_scale_animation_->IsAnimationStarted()) page_scale_animation_->StartAnimation(monotonic_time); active_tree_->SetPageScaleOnActiveTree( page_scale_animation_->PageScaleFactorAtTime(monotonic_time)); gfx::ScrollOffset next_scroll = gfx::ScrollOffset( page_scale_animation_->ScrollOffsetAtTime(monotonic_time)); DCHECK(viewport()); viewport()->ScrollByInnerFirst(next_scroll.DeltaFrom(scroll_total)); if (page_scale_animation_->IsAnimationCompleteAtTime(monotonic_time)) { page_scale_animation_ = nullptr; client_->SetNeedsCommitOnImplThread(); client_->RenewTreePriority(); client_->DidCompletePageScaleAnimationOnImplThread(); } else { SetNeedsOneBeginImplFrame(); } return true; } bool LayerTreeHostImpl::AnimateBrowserControls(base::TimeTicks time) { if (!browser_controls_offset_manager_->has_animation()) return false; gfx::Vector2dF scroll = browser_controls_offset_manager_->Animate(time); if (browser_controls_offset_manager_->has_animation()) SetNeedsOneBeginImplFrame(); if (active_tree_->TotalScrollOffset().y() == 0.f) return false; if (scroll.IsZero()) return false; DCHECK(viewport()); viewport()->ScrollBy(scroll, gfx::Point(), false, false, true); client_->SetNeedsCommitOnImplThread(); client_->RenewTreePriority(); return true; } bool LayerTreeHostImpl::AnimateScrollbars(base::TimeTicks monotonic_time) { bool animated = false; for (auto& pair : scrollbar_animation_controllers_) animated |= pair.second->Animate(monotonic_time); return animated; } bool LayerTreeHostImpl::AnimateLayers(base::TimeTicks monotonic_time) { const bool animated = mutator_host_->AnimateLayers(monotonic_time); // TODO(crbug.com/551134): Only do this if the animations are on the active // tree, or if they are on the pending tree waiting for some future time to // start. // TODO(crbug.com/551138): We currently have a single signal from the // animation_host, so on the last frame of an animation we will // still request an extra SetNeedsAnimate here. if (animated) SetNeedsOneBeginImplFrame(); // TODO(crbug.com/551138): We could return true only if the animations are on // the active tree. There's no need to cause a draw to take place from // animations starting/ticking on the pending tree. return animated; } void LayerTreeHostImpl::UpdateAnimationState(bool start_ready_animations) { std::unique_ptr events = mutator_host_->CreateEvents(); const bool has_active_animations = mutator_host_->UpdateAnimationState(start_ready_animations, events.get()); if (!events->IsEmpty()) client_->PostAnimationEventsToMainThreadOnImplThread(std::move(events)); if (has_active_animations) SetNeedsOneBeginImplFrame(); } void LayerTreeHostImpl::ActivateAnimations() { const bool activated = mutator_host_->ActivateAnimations(); if (activated) { // Activating an animation changes layer draw properties, such as // screen_space_transform_is_animating. So when we see a new animation get // activated, we need to update the draw properties on the active tree. active_tree()->set_needs_update_draw_properties(); // Request another frame to run the next tick of the animation. SetNeedsOneBeginImplFrame(); } } std::string LayerTreeHostImpl::LayerTreeAsJson() const { std::string str; if (active_tree_->root_layer_for_testing()) { std::unique_ptr json( active_tree_->root_layer_for_testing()->LayerTreeAsJson()); base::JSONWriter::WriteWithOptions( *json, base::JSONWriter::OPTIONS_PRETTY_PRINT, &str); } return str; } void LayerTreeHostImpl::RegisterScrollbarAnimationController( int scroll_layer_id) { if (settings().scrollbar_animator == LayerTreeSettings::NO_ANIMATOR) return; if (ScrollbarAnimationControllerForId(scroll_layer_id)) return; scrollbar_animation_controllers_[scroll_layer_id] = active_tree_->CreateScrollbarAnimationController(scroll_layer_id); } void LayerTreeHostImpl::UnregisterScrollbarAnimationController( int scroll_layer_id) { scrollbar_animation_controllers_.erase(scroll_layer_id); } ScrollbarAnimationController* LayerTreeHostImpl::ScrollbarAnimationControllerForId( int scroll_layer_id) const { // The viewport layers have only one set of scrollbars and their controller // is registered with the outer viewport. if (InnerViewportScrollLayer() && OuterViewportScrollLayer() && scroll_layer_id == InnerViewportScrollLayer()->id()) scroll_layer_id = OuterViewportScrollLayer()->id(); auto i = scrollbar_animation_controllers_.find(scroll_layer_id); if (i == scrollbar_animation_controllers_.end()) return nullptr; return i->second.get(); } void LayerTreeHostImpl::PostDelayedScrollbarAnimationTask( const base::Closure& task, base::TimeDelta delay) { client_->PostDelayedAnimationTaskOnImplThread(task, delay); } // TODO(danakj): Make this a return value from the Animate() call instead of an // interface on LTHI. (Also, crbug.com/551138.) void LayerTreeHostImpl::SetNeedsAnimateForScrollbarAnimation() { TRACE_EVENT0("cc", "LayerTreeHostImpl::SetNeedsAnimateForScrollbarAnimation"); SetNeedsOneBeginImplFrame(); } // TODO(danakj): Make this a return value from the Animate() call instead of an // interface on LTHI. (Also, crbug.com/551138.) void LayerTreeHostImpl::SetNeedsRedrawForScrollbarAnimation() { SetNeedsRedraw(); } ScrollbarSet LayerTreeHostImpl::ScrollbarsFor(int scroll_layer_id) const { return active_tree_->ScrollbarsFor(scroll_layer_id); } void LayerTreeHostImpl::AddVideoFrameController( VideoFrameController* controller) { bool was_empty = video_frame_controllers_.empty(); video_frame_controllers_.insert(controller); if (current_begin_frame_tracker_.DangerousMethodHasStarted() && !current_begin_frame_tracker_.DangerousMethodHasFinished()) controller->OnBeginFrame(current_begin_frame_tracker_.Current()); if (was_empty) client_->SetVideoNeedsBeginFrames(true); } void LayerTreeHostImpl::RemoveVideoFrameController( VideoFrameController* controller) { video_frame_controllers_.erase(controller); if (video_frame_controllers_.empty()) client_->SetVideoNeedsBeginFrames(false); } void LayerTreeHostImpl::SetTreePriority(TreePriority priority) { if (global_tile_state_.tree_priority == priority) return; global_tile_state_.tree_priority = priority; DidModifyTilePriorities(); } TreePriority LayerTreeHostImpl::GetTreePriority() const { return global_tile_state_.tree_priority; } BeginFrameArgs LayerTreeHostImpl::CurrentBeginFrameArgs() const { // TODO(mithro): Replace call with current_begin_frame_tracker_.Current() // once all calls which happens outside impl frames are fixed. return current_begin_frame_tracker_.DangerousMethodCurrentOrLast(); } base::TimeDelta LayerTreeHostImpl::CurrentBeginFrameInterval() const { return current_begin_frame_tracker_.Interval(); } std::unique_ptr LayerTreeHostImpl::AsValueWithFrame(FrameData* frame) const { std::unique_ptr state( new base::trace_event::TracedValue()); AsValueWithFrameInto(frame, state.get()); return std::move(state); } void LayerTreeHostImpl::AsValueWithFrameInto( FrameData* frame, base::trace_event::TracedValue* state) const { if (this->pending_tree_) { state->BeginDictionary("activation_state"); ActivationStateAsValueInto(state); state->EndDictionary(); } MathUtil::AddToTracedValue("device_viewport_size", device_viewport_size_, state); std::vector prioritized_tiles; active_tree_->GetAllPrioritizedTilesForTracing(&prioritized_tiles); if (pending_tree_) pending_tree_->GetAllPrioritizedTilesForTracing(&prioritized_tiles); state->BeginArray("active_tiles"); for (const auto& prioritized_tile : prioritized_tiles) { state->BeginDictionary(); prioritized_tile.AsValueInto(state); state->EndDictionary(); } state->EndArray(); state->BeginDictionary("tile_manager_basic_state"); tile_manager_.BasicStateAsValueInto(state); state->EndDictionary(); state->BeginDictionary("active_tree"); active_tree_->AsValueInto(state); state->EndDictionary(); if (pending_tree_) { state->BeginDictionary("pending_tree"); pending_tree_->AsValueInto(state); state->EndDictionary(); } if (frame) { state->BeginDictionary("frame"); frame->AsValueInto(state); state->EndDictionary(); } } void LayerTreeHostImpl::ActivationStateAsValueInto( base::trace_event::TracedValue* state) const { TracedValue::SetIDRef(this, state, "lthi"); state->BeginDictionary("tile_manager"); tile_manager_.BasicStateAsValueInto(state); state->EndDictionary(); } void LayerTreeHostImpl::SetDebugState( const LayerTreeDebugState& new_debug_state) { if (LayerTreeDebugState::Equal(debug_state_, new_debug_state)) return; debug_state_ = new_debug_state; UpdateTileManagerMemoryPolicy(ActualManagedMemoryPolicy()); SetFullViewportDamage(); } void LayerTreeHostImpl::CreateUIResource(UIResourceId uid, const UIResourceBitmap& bitmap) { DCHECK_GT(uid, 0); // Allow for multiple creation requests with the same UIResourceId. The // previous resource is simply deleted. ResourceId id = ResourceIdForUIResource(uid); if (id) DeleteUIResource(uid); if (!has_valid_compositor_frame_sink_) { evicted_ui_resources_.insert(uid); return; } ResourceFormat format = resource_provider_->best_texture_format(); switch (bitmap.GetFormat()) { case UIResourceBitmap::RGBA8: break; case UIResourceBitmap::ALPHA_8: format = ALPHA_8; break; case UIResourceBitmap::ETC1: format = ETC1; break; } const gfx::Size source_size = bitmap.GetSize(); gfx::Size upload_size = bitmap.GetSize(); bool scaled = false; int max_texture_size = resource_provider_->max_texture_size(); if (source_size.width() > max_texture_size || source_size.height() > max_texture_size) { // Must resize the bitmap to fit within the max texture size. scaled = true; int edge = std::max(source_size.width(), source_size.height()); float scale = static_cast(max_texture_size - 1) / edge; DCHECK_LT(scale, 1.f); upload_size = gfx::ScaleToCeiledSize(source_size, scale, scale); } id = resource_provider_->CreateResource( upload_size, ResourceProvider::TEXTURE_HINT_IMMUTABLE, format, gfx::ColorSpace()); if (!scaled) { AutoLockUIResourceBitmap bitmap_lock(bitmap); auto* pixels = bitmap_lock.GetPixels(); resource_provider_->CopyToResource(id, pixels, source_size); } else { // Only support auto-resizing for N32 textures (since this is primarily for // scrollbars). Users of other types need to ensure they are not too big. DCHECK_EQ(bitmap.GetFormat(), UIResourceBitmap::RGBA8); float canvas_scale_x = upload_size.width() / static_cast(source_size.width()); float canvas_scale_y = upload_size.height() / static_cast(source_size.height()); // Uses kPremul_SkAlphaType since that is what SkBitmap's allocN32Pixels // makes, and we only support the RGBA8 format here. SkImageInfo info = SkImageInfo::MakeN32( source_size.width(), source_size.height(), kPremul_SkAlphaType); int row_bytes = source_size.width() * 4; AutoLockUIResourceBitmap bitmap_lock(bitmap); SkBitmap source_bitmap; source_bitmap.setInfo(info, row_bytes); source_bitmap.setPixels(const_cast(bitmap_lock.GetPixels())); // This applies the scale to draw the |bitmap| into |scaled_bitmap|. SkBitmap scaled_bitmap; scaled_bitmap.allocN32Pixels(upload_size.width(), upload_size.height()); SkCanvas scaled_canvas(scaled_bitmap); scaled_canvas.scale(canvas_scale_x, canvas_scale_y); // The |canvas_scale_x| and |canvas_scale_y| may have some floating point // error for large enough values, causing pixels on the edge to be not // fully filled by drawBitmap(), so we ensure they start empty. (See // crbug.com/642011 for an example.) scaled_canvas.clear(SK_ColorTRANSPARENT); scaled_canvas.drawBitmap(source_bitmap, 0, 0); SkAutoLockPixels scaled_bitmap_lock(scaled_bitmap); auto* pixels = static_cast(scaled_bitmap.getPixels()); resource_provider_->CopyToResource(id, pixels, upload_size); } UIResourceData data; data.resource_id = id; data.opaque = bitmap.GetOpaque(); ui_resource_map_[uid] = data; resource_provider_->GenerateSyncTokenForResource(id); MarkUIResourceNotEvicted(uid); } void LayerTreeHostImpl::DeleteUIResource(UIResourceId uid) { ResourceId id = ResourceIdForUIResource(uid); if (id) { if (has_valid_compositor_frame_sink_) resource_provider_->DeleteResource(id); ui_resource_map_.erase(uid); } MarkUIResourceNotEvicted(uid); } void LayerTreeHostImpl::ClearUIResources() { for (UIResourceMap::const_iterator iter = ui_resource_map_.begin(); iter != ui_resource_map_.end(); ++iter) { evicted_ui_resources_.insert(iter->first); resource_provider_->DeleteResource(iter->second.resource_id); } ui_resource_map_.clear(); } void LayerTreeHostImpl::EvictAllUIResources() { if (ui_resource_map_.empty()) return; ClearUIResources(); client_->SetNeedsCommitOnImplThread(); client_->OnCanDrawStateChanged(CanDraw()); client_->RenewTreePriority(); } ResourceId LayerTreeHostImpl::ResourceIdForUIResource(UIResourceId uid) const { UIResourceMap::const_iterator iter = ui_resource_map_.find(uid); if (iter != ui_resource_map_.end()) return iter->second.resource_id; return 0; } bool LayerTreeHostImpl::IsUIResourceOpaque(UIResourceId uid) const { UIResourceMap::const_iterator iter = ui_resource_map_.find(uid); DCHECK(iter != ui_resource_map_.end()); return iter->second.opaque; } bool LayerTreeHostImpl::EvictedUIResourcesExist() const { return !evicted_ui_resources_.empty(); } void LayerTreeHostImpl::MarkUIResourceNotEvicted(UIResourceId uid) { std::set::iterator found_in_evicted = evicted_ui_resources_.find(uid); if (found_in_evicted == evicted_ui_resources_.end()) return; evicted_ui_resources_.erase(found_in_evicted); if (evicted_ui_resources_.empty()) client_->OnCanDrawStateChanged(CanDraw()); } void LayerTreeHostImpl::ScheduleMicroBenchmark( std::unique_ptr benchmark) { micro_benchmark_controller_.ScheduleRun(std::move(benchmark)); } void LayerTreeHostImpl::InsertSwapPromiseMonitor(SwapPromiseMonitor* monitor) { swap_promise_monitor_.insert(monitor); } void LayerTreeHostImpl::RemoveSwapPromiseMonitor(SwapPromiseMonitor* monitor) { swap_promise_monitor_.erase(monitor); } void LayerTreeHostImpl::NotifySwapPromiseMonitorsOfSetNeedsRedraw() { std::set::iterator it = swap_promise_monitor_.begin(); for (; it != swap_promise_monitor_.end(); it++) (*it)->OnSetNeedsRedrawOnImpl(); } void LayerTreeHostImpl::NotifySwapPromiseMonitorsOfForwardingToMainThread() { std::set::iterator it = swap_promise_monitor_.begin(); for (; it != swap_promise_monitor_.end(); it++) (*it)->OnForwardScrollUpdateToMainThreadOnImpl(); } void LayerTreeHostImpl::UpdateRootLayerStateForSynchronousInputHandler() { if (!input_handler_client_) return; input_handler_client_->UpdateRootLayerStateForSynchronousInputHandler( active_tree_->TotalScrollOffset(), active_tree_->TotalMaxScrollOffset(), active_tree_->ScrollableSize(), active_tree_->current_page_scale_factor(), active_tree_->min_page_scale_factor(), active_tree_->max_page_scale_factor()); } void LayerTreeHostImpl::ScrollAnimationAbort(LayerImpl* layer_impl) { return mutator_host_->ScrollAnimationAbort(false /* needs_completion */); } bool LayerTreeHostImpl::ScrollAnimationUpdateTarget( ScrollNode* scroll_node, const gfx::Vector2dF& scroll_delta, base::TimeDelta delayed_by) { DCHECK_EQ( ElementId(active_tree()->LayerById(scroll_node->owner_id)->element_id()), scroll_node->element_id); return mutator_host_->ImplOnlyScrollAnimationUpdateTarget( scroll_node->element_id, scroll_delta, active_tree_->property_trees()->scroll_tree.MaxScrollOffset( scroll_node->id), CurrentBeginFrameArgs().frame_time, delayed_by); } bool LayerTreeHostImpl::IsElementInList(ElementId element_id, ElementListType list_type) const { if (list_type == ElementListType::ACTIVE) { return active_tree() ? active_tree()->LayerByElementId(element_id) != nullptr : false; } else { if (pending_tree() && pending_tree()->LayerByElementId(element_id)) return true; if (recycle_tree() && recycle_tree()->LayerByElementId(element_id)) return true; return false; } } void LayerTreeHostImpl::SetMutatorsNeedCommit() {} void LayerTreeHostImpl::SetMutatorsNeedRebuildPropertyTrees() {} void LayerTreeHostImpl::SetTreeLayerFilterMutated( ElementId element_id, LayerTreeImpl* tree, const FilterOperations& filters) { if (!tree) return; const int layer_id = tree->LayerIdByElementId(element_id); DCHECK(tree->property_trees()->IsInIdToIndexMap( PropertyTrees::TreeType::EFFECT, layer_id)); const int effect_id = tree->property_trees()->effect_id_to_index_map[layer_id]; if (effect_id != EffectTree::kInvalidNodeId) tree->property_trees()->effect_tree.OnFilterAnimated(filters, effect_id, tree); } void LayerTreeHostImpl::SetTreeLayerOpacityMutated(ElementId element_id, LayerTreeImpl* tree, float opacity) { if (!tree) return; const int layer_id = tree->LayerIdByElementId(element_id); DCHECK(tree->property_trees()->IsInIdToIndexMap( PropertyTrees::TreeType::EFFECT, layer_id)); const int effect_id = tree->property_trees()->effect_id_to_index_map[layer_id]; if (effect_id != EffectTree::kInvalidNodeId) tree->property_trees()->effect_tree.OnOpacityAnimated(opacity, effect_id, tree); } void LayerTreeHostImpl::SetTreeLayerTransformMutated( ElementId element_id, LayerTreeImpl* tree, const gfx::Transform& transform) { if (!tree) return; const int layer_id = tree->LayerIdByElementId(element_id); DCHECK(tree->property_trees()->IsInIdToIndexMap( PropertyTrees::TreeType::TRANSFORM, layer_id)); const int transform_id = tree->property_trees()->transform_id_to_index_map[layer_id]; if (transform_id != TransformTree::kInvalidNodeId) tree->property_trees()->transform_tree.OnTransformAnimated( transform, transform_id, tree); LayerImpl* layer = tree->LayerById(layer_id); if (layer) layer->set_was_ever_ready_since_last_transform_animation(false); } void LayerTreeHostImpl::SetTreeLayerScrollOffsetMutated( ElementId element_id, LayerTreeImpl* tree, const gfx::ScrollOffset& scroll_offset) { if (!tree) return; const int layer_id = tree->LayerIdByElementId(element_id); DCHECK(tree->property_trees()->IsInIdToIndexMap( PropertyTrees::TreeType::TRANSFORM, layer_id)); DCHECK(tree->property_trees()->IsInIdToIndexMap( PropertyTrees::TreeType::SCROLL, layer_id)); const int transform_id = tree->property_trees()->transform_id_to_index_map[layer_id]; const int scroll_id = tree->property_trees()->scroll_id_to_index_map[layer_id]; if (transform_id != TransformTree::kInvalidNodeId && scroll_id != ScrollTree::kInvalidNodeId) { tree->property_trees()->scroll_tree.OnScrollOffsetAnimated( layer_id, transform_id, scroll_id, scroll_offset, tree); // Run mutation callbacks to respond to updated scroll offset. Mutate(CurrentBeginFrameArgs().frame_time); } } bool LayerTreeHostImpl::AnimationsPreserveAxisAlignment( const LayerImpl* layer) const { return mutator_host_->AnimationsPreserveAxisAlignment(layer->element_id()); } void LayerTreeHostImpl::SetNeedUpdateGpuRasterizationStatus() { need_update_gpu_rasterization_status_ = true; } void LayerTreeHostImpl::SetElementFilterMutated( ElementId element_id, ElementListType list_type, const FilterOperations& filters) { if (list_type == ElementListType::ACTIVE) { SetTreeLayerFilterMutated(element_id, active_tree(), filters); } else { SetTreeLayerFilterMutated(element_id, pending_tree(), filters); SetTreeLayerFilterMutated(element_id, recycle_tree(), filters); } } void LayerTreeHostImpl::SetElementOpacityMutated(ElementId element_id, ElementListType list_type, float opacity) { if (list_type == ElementListType::ACTIVE) { SetTreeLayerOpacityMutated(element_id, active_tree(), opacity); } else { SetTreeLayerOpacityMutated(element_id, pending_tree(), opacity); SetTreeLayerOpacityMutated(element_id, recycle_tree(), opacity); } } void LayerTreeHostImpl::SetElementTransformMutated( ElementId element_id, ElementListType list_type, const gfx::Transform& transform) { if (list_type == ElementListType::ACTIVE) { SetTreeLayerTransformMutated(element_id, active_tree(), transform); } else { SetTreeLayerTransformMutated(element_id, pending_tree(), transform); SetTreeLayerTransformMutated(element_id, recycle_tree(), transform); } } void LayerTreeHostImpl::SetElementScrollOffsetMutated( ElementId element_id, ElementListType list_type, const gfx::ScrollOffset& scroll_offset) { if (list_type == ElementListType::ACTIVE) { SetTreeLayerScrollOffsetMutated(element_id, active_tree(), scroll_offset); } else { SetTreeLayerScrollOffsetMutated(element_id, pending_tree(), scroll_offset); SetTreeLayerScrollOffsetMutated(element_id, recycle_tree(), scroll_offset); } } void LayerTreeHostImpl::ElementIsAnimatingChanged( ElementId element_id, ElementListType list_type, const PropertyAnimationState& mask, const PropertyAnimationState& state) { LayerTreeImpl* tree = list_type == ElementListType::ACTIVE ? active_tree() : pending_tree(); if (!tree) return; LayerImpl* layer = tree->LayerByElementId(element_id); if (layer) layer->OnIsAnimatingChanged(mask, state); } void LayerTreeHostImpl::ScrollOffsetAnimationFinished() { // TODO(majidvp): We should pass in the original starting scroll position here ScrollStateData scroll_state_data; ScrollState scroll_state(scroll_state_data); ScrollEnd(&scroll_state); } gfx::ScrollOffset LayerTreeHostImpl::GetScrollOffsetForAnimation( ElementId element_id) const { if (active_tree()) { LayerImpl* layer = active_tree()->LayerByElementId(element_id); if (layer) return layer->ScrollOffsetForAnimation(); } return gfx::ScrollOffset(); } bool LayerTreeHostImpl::SupportsImplScrolling() const { // Supported in threaded mode. return task_runner_provider_->HasImplThread(); } bool LayerTreeHostImpl::CommitToActiveTree() const { // In single threaded mode we skip the pending tree and commit directly to the // active tree. return !task_runner_provider_->HasImplThread(); } void LayerTreeHostImpl::SetContextVisibility(bool is_visible) { if (!compositor_frame_sink_) return; // Update the compositor context. If we are already in the correct visibility // state, skip. This can happen if we transition invisible/visible rapidly, // before we get a chance to go invisible in NotifyAllTileTasksComplete. auto* compositor_context = compositor_frame_sink_->context_provider(); if (compositor_context && is_visible != !!compositor_context_visibility_) { if (is_visible) { compositor_context_visibility_ = compositor_context->CacheController()->ClientBecameVisible(); } else { compositor_context->CacheController()->ClientBecameNotVisible( std::move(compositor_context_visibility_)); } } // Update the worker context. If we are already in the correct visibility // state, skip. This can happen if we transition invisible/visible rapidly, // before we get a chance to go invisible in NotifyAllTileTasksComplete. auto* worker_context = compositor_frame_sink_->worker_context_provider(); if (worker_context && is_visible != !!worker_context_visibility_) { ContextProvider::ScopedContextLock hold(worker_context); if (is_visible) { worker_context_visibility_ = worker_context->CacheController()->ClientBecameVisible(); } else { worker_context->CacheController()->ClientBecameNotVisible( std::move(worker_context_visibility_)); } } } } // namespace cc