| // 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/single_thread_proxy.h" |
| |
| #include "base/auto_reset.h" |
| #include "base/memory/ptr_util.h" |
| #include "base/profiler/scoped_tracker.h" |
| #include "base/trace_event/trace_event.h" |
| #include "cc/debug/benchmark_instrumentation.h" |
| #include "cc/debug/devtools_instrumentation.h" |
| #include "cc/output/compositor_frame_sink.h" |
| #include "cc/output/context_provider.h" |
| #include "cc/quads/draw_quad.h" |
| #include "cc/resources/ui_resource_manager.h" |
| #include "cc/scheduler/commit_earlyout_reason.h" |
| #include "cc/scheduler/compositor_timing_history.h" |
| #include "cc/scheduler/delay_based_time_source.h" |
| #include "cc/scheduler/scheduler.h" |
| #include "cc/trees/layer_tree_host_common.h" |
| #include "cc/trees/layer_tree_host_in_process.h" |
| #include "cc/trees/layer_tree_host_single_thread_client.h" |
| #include "cc/trees/layer_tree_impl.h" |
| #include "cc/trees/mutator_host.h" |
| #include "cc/trees/scoped_abort_remaining_swap_promises.h" |
| |
| namespace cc { |
| |
| std::unique_ptr<Proxy> SingleThreadProxy::Create( |
| LayerTreeHostInProcess* layer_tree_host, |
| LayerTreeHostSingleThreadClient* client, |
| TaskRunnerProvider* task_runner_provider) { |
| return base::WrapUnique( |
| new SingleThreadProxy(layer_tree_host, client, task_runner_provider)); |
| } |
| |
| SingleThreadProxy::SingleThreadProxy(LayerTreeHostInProcess* layer_tree_host, |
| LayerTreeHostSingleThreadClient* client, |
| TaskRunnerProvider* task_runner_provider) |
| : layer_tree_host_(layer_tree_host), |
| single_thread_client_(client), |
| task_runner_provider_(task_runner_provider), |
| next_frame_is_newly_committed_frame_(false), |
| #if DCHECK_IS_ON() |
| inside_impl_frame_(false), |
| #endif |
| inside_draw_(false), |
| defer_commits_(false), |
| animate_requested_(false), |
| commit_requested_(false), |
| inside_synchronous_composite_(false), |
| compositor_frame_sink_creation_requested_(false), |
| compositor_frame_sink_lost_(true), |
| weak_factory_(this) { |
| TRACE_EVENT0("cc", "SingleThreadProxy::SingleThreadProxy"); |
| DCHECK(task_runner_provider_); |
| DCHECK(task_runner_provider_->IsMainThread()); |
| DCHECK(layer_tree_host); |
| } |
| |
| void SingleThreadProxy::Start() { |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| |
| const LayerTreeSettings& settings = layer_tree_host_->GetSettings(); |
| if (settings.single_thread_proxy_scheduler && !scheduler_on_impl_thread_) { |
| SchedulerSettings scheduler_settings(settings.ToSchedulerSettings()); |
| scheduler_settings.commit_to_active_tree = CommitToActiveTree(); |
| |
| std::unique_ptr<CompositorTimingHistory> compositor_timing_history( |
| new CompositorTimingHistory( |
| scheduler_settings.using_synchronous_renderer_compositor, |
| CompositorTimingHistory::BROWSER_UMA, |
| layer_tree_host_->rendering_stats_instrumentation())); |
| scheduler_on_impl_thread_.reset( |
| new Scheduler(this, scheduler_settings, layer_tree_host_->GetId(), |
| task_runner_provider_->MainThreadTaskRunner(), |
| std::move(compositor_timing_history))); |
| } |
| |
| layer_tree_host_impl_ = layer_tree_host_->CreateLayerTreeHostImpl(this); |
| } |
| |
| SingleThreadProxy::~SingleThreadProxy() { |
| TRACE_EVENT0("cc", "SingleThreadProxy::~SingleThreadProxy"); |
| DCHECK(task_runner_provider_->IsMainThread()); |
| // Make sure Stop() got called or never Started. |
| DCHECK(!layer_tree_host_impl_); |
| } |
| |
| bool SingleThreadProxy::IsStarted() const { |
| DCHECK(task_runner_provider_->IsMainThread()); |
| return !!layer_tree_host_impl_; |
| } |
| |
| bool SingleThreadProxy::CommitToActiveTree() const { |
| // With SingleThreadProxy we skip the pending tree and commit directly to the |
| // active tree. |
| return true; |
| } |
| |
| void SingleThreadProxy::SetVisible(bool visible) { |
| TRACE_EVENT1("cc", "SingleThreadProxy::SetVisible", "visible", visible); |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| |
| layer_tree_host_impl_->SetVisible(visible); |
| |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->SetVisible(layer_tree_host_impl_->visible()); |
| } |
| |
| void SingleThreadProxy::RequestNewCompositorFrameSink() { |
| DCHECK(task_runner_provider_->IsMainThread()); |
| compositor_frame_sink_creation_callback_.Cancel(); |
| if (compositor_frame_sink_creation_requested_) |
| return; |
| compositor_frame_sink_creation_requested_ = true; |
| layer_tree_host_->RequestNewCompositorFrameSink(); |
| } |
| |
| void SingleThreadProxy::ReleaseCompositorFrameSink() { |
| compositor_frame_sink_lost_ = true; |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->DidLoseCompositorFrameSink(); |
| return layer_tree_host_impl_->ReleaseCompositorFrameSink(); |
| } |
| |
| void SingleThreadProxy::SetCompositorFrameSink( |
| CompositorFrameSink* compositor_frame_sink) { |
| DCHECK(task_runner_provider_->IsMainThread()); |
| DCHECK(compositor_frame_sink_creation_requested_); |
| |
| bool success; |
| { |
| DebugScopedSetMainThreadBlocked main_thread_blocked(task_runner_provider_); |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| success = layer_tree_host_impl_->InitializeRenderer(compositor_frame_sink); |
| } |
| |
| if (success) { |
| layer_tree_host_->DidInitializeCompositorFrameSink(); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->DidCreateAndInitializeCompositorFrameSink(); |
| else if (!inside_synchronous_composite_) |
| SetNeedsCommit(); |
| compositor_frame_sink_creation_requested_ = false; |
| compositor_frame_sink_lost_ = false; |
| } else { |
| // DidFailToInitializeCompositorFrameSink is treated as a |
| // RequestNewCompositorFrameSink, and so |
| // compositor_frame_sink_creation_requested remains true. |
| layer_tree_host_->DidFailToInitializeCompositorFrameSink(); |
| } |
| } |
| |
| void SingleThreadProxy::SetNeedsAnimate() { |
| TRACE_EVENT0("cc", "SingleThreadProxy::SetNeedsAnimate"); |
| DCHECK(task_runner_provider_->IsMainThread()); |
| single_thread_client_->RequestScheduleAnimation(); |
| if (animate_requested_) |
| return; |
| animate_requested_ = true; |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->SetNeedsBeginMainFrame(); |
| } |
| |
| void SingleThreadProxy::SetNeedsUpdateLayers() { |
| TRACE_EVENT0("cc", "SingleThreadProxy::SetNeedsUpdateLayers"); |
| DCHECK(task_runner_provider_->IsMainThread()); |
| SetNeedsCommit(); |
| } |
| |
| void SingleThreadProxy::DoCommit() { |
| TRACE_EVENT0("cc", "SingleThreadProxy::DoCommit"); |
| DCHECK(task_runner_provider_->IsMainThread()); |
| |
| layer_tree_host_->WillCommit(); |
| devtools_instrumentation::ScopedCommitTrace commit_task( |
| layer_tree_host_->GetId()); |
| |
| // Commit immediately. |
| { |
| DebugScopedSetMainThreadBlocked main_thread_blocked(task_runner_provider_); |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| |
| // This CapturePostTasks should be destroyed before CommitComplete() is |
| // called since that goes out to the embedder, and we want the embedder |
| // to receive its callbacks before that. |
| commit_blocking_task_runner_.reset(new BlockingTaskRunner::CapturePostTasks( |
| task_runner_provider_->blocking_main_thread_task_runner())); |
| |
| layer_tree_host_impl_->ReadyToCommit(); |
| layer_tree_host_impl_->BeginCommit(); |
| |
| if (layer_tree_host_impl_->EvictedUIResourcesExist()) |
| layer_tree_host_->GetUIResourceManager()->RecreateUIResources(); |
| |
| layer_tree_host_->FinishCommitOnImplThread(layer_tree_host_impl_.get()); |
| |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->DidCommit(); |
| |
| layer_tree_host_impl_->CommitComplete(); |
| |
| // Commit goes directly to the active tree, but we need to synchronously |
| // "activate" the tree still during commit to satisfy any potential |
| // SetNextCommitWaitsForActivation calls. Unfortunately, the tree |
| // might not be ready to draw, so DidActivateSyncTree must set |
| // the flag to force the tree to not draw until textures are ready. |
| NotifyReadyToActivate(); |
| } |
| } |
| |
| void SingleThreadProxy::CommitComplete() { |
| // Commit complete happens on the main side after activate to satisfy any |
| // SetNextCommitWaitsForActivation calls. |
| DCHECK(!layer_tree_host_impl_->pending_tree()) |
| << "Activation is expected to have synchronously occurred by now."; |
| DCHECK(commit_blocking_task_runner_); |
| |
| DebugScopedSetMainThread main(task_runner_provider_); |
| commit_blocking_task_runner_.reset(); |
| layer_tree_host_->CommitComplete(); |
| layer_tree_host_->DidBeginMainFrame(); |
| |
| next_frame_is_newly_committed_frame_ = true; |
| } |
| |
| void SingleThreadProxy::SetNeedsCommit() { |
| DCHECK(task_runner_provider_->IsMainThread()); |
| single_thread_client_->RequestScheduleComposite(); |
| if (commit_requested_) |
| return; |
| commit_requested_ = true; |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->SetNeedsBeginMainFrame(); |
| } |
| |
| void SingleThreadProxy::SetNeedsRedraw(const gfx::Rect& damage_rect) { |
| TRACE_EVENT0("cc", "SingleThreadProxy::SetNeedsRedraw"); |
| DCHECK(task_runner_provider_->IsMainThread()); |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| layer_tree_host_impl_->SetViewportDamage(damage_rect); |
| SetNeedsRedrawOnImplThread(); |
| } |
| |
| void SingleThreadProxy::SetNextCommitWaitsForActivation() { |
| // Activation always forced in commit, so nothing to do. |
| DCHECK(task_runner_provider_->IsMainThread()); |
| } |
| |
| void SingleThreadProxy::SetDeferCommits(bool defer_commits) { |
| DCHECK(task_runner_provider_->IsMainThread()); |
| // Deferring commits only makes sense if there's a scheduler. |
| if (!scheduler_on_impl_thread_) |
| return; |
| if (defer_commits_ == defer_commits) |
| return; |
| |
| if (defer_commits) |
| TRACE_EVENT_ASYNC_BEGIN0("cc", "SingleThreadProxy::SetDeferCommits", this); |
| else |
| TRACE_EVENT_ASYNC_END0("cc", "SingleThreadProxy::SetDeferCommits", this); |
| |
| defer_commits_ = defer_commits; |
| scheduler_on_impl_thread_->SetDeferCommits(defer_commits); |
| } |
| |
| bool SingleThreadProxy::CommitRequested() const { |
| DCHECK(task_runner_provider_->IsMainThread()); |
| return commit_requested_; |
| } |
| |
| bool SingleThreadProxy::BeginMainFrameRequested() const { |
| DCHECK(task_runner_provider_->IsMainThread()); |
| // If there is no scheduler, then there can be no pending begin frame, |
| // as all frames are all manually initiated by the embedder of cc. |
| if (!scheduler_on_impl_thread_) |
| return false; |
| return commit_requested_; |
| } |
| |
| void SingleThreadProxy::Stop() { |
| TRACE_EVENT0("cc", "SingleThreadProxy::stop"); |
| DCHECK(task_runner_provider_->IsMainThread()); |
| { |
| DebugScopedSetMainThreadBlocked main_thread_blocked(task_runner_provider_); |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| |
| // Prevent the scheduler from performing actions while we're in an |
| // inconsistent state. |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->Stop(); |
| // Take away the CompositorFrameSink before destroying things so it doesn't |
| // try to call into its client mid-shutdown. |
| layer_tree_host_impl_->ReleaseCompositorFrameSink(); |
| scheduler_on_impl_thread_ = nullptr; |
| layer_tree_host_impl_ = nullptr; |
| } |
| layer_tree_host_ = nullptr; |
| } |
| |
| void SingleThreadProxy::SetMutator(std::unique_ptr<LayerTreeMutator> mutator) { |
| DCHECK(task_runner_provider_->IsMainThread()); |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| layer_tree_host_impl_->SetLayerTreeMutator(std::move(mutator)); |
| } |
| |
| void SingleThreadProxy::OnCanDrawStateChanged(bool can_draw) { |
| TRACE_EVENT1("cc", "SingleThreadProxy::OnCanDrawStateChanged", "can_draw", |
| can_draw); |
| DCHECK(task_runner_provider_->IsImplThread()); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->SetCanDraw(can_draw); |
| } |
| |
| void SingleThreadProxy::NotifyReadyToActivate() { |
| TRACE_EVENT0("cc", "SingleThreadProxy::NotifyReadyToActivate"); |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->NotifyReadyToActivate(); |
| } |
| |
| void SingleThreadProxy::NotifyReadyToDraw() { |
| TRACE_EVENT0("cc", "SingleThreadProxy::NotifyReadyToDraw"); |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->NotifyReadyToDraw(); |
| } |
| |
| void SingleThreadProxy::SetNeedsRedrawOnImplThread() { |
| single_thread_client_->RequestScheduleComposite(); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->SetNeedsRedraw(); |
| } |
| |
| void SingleThreadProxy::SetNeedsOneBeginImplFrameOnImplThread() { |
| TRACE_EVENT0("cc", |
| "SingleThreadProxy::SetNeedsOneBeginImplFrameOnImplThread"); |
| single_thread_client_->RequestScheduleComposite(); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->SetNeedsOneBeginImplFrame(); |
| } |
| |
| void SingleThreadProxy::SetNeedsPrepareTilesOnImplThread() { |
| TRACE_EVENT0("cc", "SingleThreadProxy::SetNeedsPrepareTilesOnImplThread"); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->SetNeedsPrepareTiles(); |
| } |
| |
| void SingleThreadProxy::SetNeedsCommitOnImplThread() { |
| single_thread_client_->RequestScheduleComposite(); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->SetNeedsBeginMainFrame(); |
| } |
| |
| void SingleThreadProxy::SetVideoNeedsBeginFrames(bool needs_begin_frames) { |
| TRACE_EVENT1("cc", "SingleThreadProxy::SetVideoNeedsBeginFrames", |
| "needs_begin_frames", needs_begin_frames); |
| // In tests the layer tree is destroyed after the scheduler is. |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->SetVideoNeedsBeginFrames(needs_begin_frames); |
| } |
| |
| void SingleThreadProxy::PostAnimationEventsToMainThreadOnImplThread( |
| std::unique_ptr<MutatorEvents> events) { |
| TRACE_EVENT0( |
| "cc", "SingleThreadProxy::PostAnimationEventsToMainThreadOnImplThread"); |
| DCHECK(task_runner_provider_->IsImplThread()); |
| DebugScopedSetMainThread main(task_runner_provider_); |
| layer_tree_host_->SetAnimationEvents(std::move(events)); |
| } |
| |
| bool SingleThreadProxy::IsInsideDraw() { |
| return inside_draw_; |
| } |
| |
| void SingleThreadProxy::DidActivateSyncTree() { |
| // Synchronously call to CommitComplete. Resetting |
| // |commit_blocking_task_runner| would make sure all tasks posted during |
| // commit/activation before CommitComplete. |
| CommitComplete(); |
| } |
| |
| void SingleThreadProxy::WillPrepareTiles() { |
| DCHECK(task_runner_provider_->IsImplThread()); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->WillPrepareTiles(); |
| } |
| |
| void SingleThreadProxy::DidPrepareTiles() { |
| DCHECK(task_runner_provider_->IsImplThread()); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->DidPrepareTiles(); |
| } |
| |
| void SingleThreadProxy::DidCompletePageScaleAnimationOnImplThread() { |
| layer_tree_host_->DidCompletePageScaleAnimation(); |
| } |
| |
| void SingleThreadProxy::DidLoseCompositorFrameSinkOnImplThread() { |
| TRACE_EVENT0("cc", |
| "SingleThreadProxy::DidLoseCompositorFrameSinkOnImplThread"); |
| { |
| DebugScopedSetMainThread main(task_runner_provider_); |
| // This must happen before we notify the scheduler as it may try to recreate |
| // the output surface if already in BEGIN_IMPL_FRAME_STATE_IDLE. |
| layer_tree_host_->DidLoseCompositorFrameSink(); |
| } |
| single_thread_client_->DidLoseCompositorFrameSink(); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->DidLoseCompositorFrameSink(); |
| compositor_frame_sink_lost_ = true; |
| } |
| |
| void SingleThreadProxy::SetBeginFrameSource(BeginFrameSource* source) { |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->SetBeginFrameSource(source); |
| } |
| |
| void SingleThreadProxy::DidReceiveCompositorFrameAckOnImplThread() { |
| TRACE_EVENT0("cc,benchmark", |
| "SingleThreadProxy::DidReceiveCompositorFrameAckOnImplThread"); |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->DidReceiveCompositorFrameAck(); |
| layer_tree_host_->DidReceiveCompositorFrameAck(); |
| } |
| |
| void SingleThreadProxy::OnDrawForCompositorFrameSink( |
| bool resourceless_software_draw) { |
| NOTREACHED() << "Implemented by ThreadProxy for synchronous compositor."; |
| } |
| |
| void SingleThreadProxy::CompositeImmediately(base::TimeTicks frame_begin_time) { |
| TRACE_EVENT0("cc,benchmark", "SingleThreadProxy::CompositeImmediately"); |
| DCHECK(task_runner_provider_->IsMainThread()); |
| #if DCHECK_IS_ON() |
| DCHECK(!inside_impl_frame_); |
| #endif |
| base::AutoReset<bool> inside_composite(&inside_synchronous_composite_, true); |
| |
| if (compositor_frame_sink_lost_) { |
| RequestNewCompositorFrameSink(); |
| // RequestNewCompositorFrameSink could have synchronously created an output |
| // surface, so check again before returning. |
| if (compositor_frame_sink_lost_) |
| return; |
| } |
| |
| BeginFrameArgs begin_frame_args(BeginFrameArgs::Create( |
| BEGINFRAME_FROM_HERE, frame_begin_time, base::TimeTicks(), |
| BeginFrameArgs::DefaultInterval(), BeginFrameArgs::NORMAL)); |
| |
| // Start the impl frame. |
| { |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| WillBeginImplFrame(begin_frame_args); |
| } |
| |
| // Run the "main thread" and get it to commit. |
| { |
| #if DCHECK_IS_ON() |
| DCHECK(inside_impl_frame_); |
| #endif |
| DoBeginMainFrame(begin_frame_args); |
| DoCommit(); |
| |
| DCHECK_EQ( |
| 0u, |
| layer_tree_host_->GetSwapPromiseManager()->num_queued_swap_promises()) |
| << "Commit should always succeed and transfer promises."; |
| } |
| |
| // Finish the impl frame. |
| { |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| layer_tree_host_impl_->ActivateSyncTree(); |
| DCHECK( |
| !layer_tree_host_impl_->active_tree()->needs_update_draw_properties()); |
| layer_tree_host_impl_->PrepareTiles(); |
| layer_tree_host_impl_->SynchronouslyInitializeAllTiles(); |
| |
| // TODO(danakj): Don't do this last... we prepared the wrong things. D: |
| layer_tree_host_impl_->Animate(); |
| |
| LayerTreeHostImpl::FrameData frame; |
| DoComposite(&frame); |
| |
| // DoComposite could abort, but because this is a synchronous composite |
| // another draw will never be scheduled, so break remaining promises. |
| layer_tree_host_impl_->active_tree()->BreakSwapPromises( |
| SwapPromise::SWAP_FAILS); |
| |
| DidFinishImplFrame(); |
| } |
| } |
| |
| bool SingleThreadProxy::SupportsImplScrolling() const { |
| return false; |
| } |
| |
| bool SingleThreadProxy::ShouldComposite() const { |
| DCHECK(task_runner_provider_->IsImplThread()); |
| return layer_tree_host_impl_->visible() && layer_tree_host_impl_->CanDraw(); |
| } |
| |
| void SingleThreadProxy::ScheduleRequestNewCompositorFrameSink() { |
| if (compositor_frame_sink_creation_callback_.IsCancelled() && |
| !compositor_frame_sink_creation_requested_) { |
| compositor_frame_sink_creation_callback_.Reset( |
| base::Bind(&SingleThreadProxy::RequestNewCompositorFrameSink, |
| weak_factory_.GetWeakPtr())); |
| task_runner_provider_->MainThreadTaskRunner()->PostTask( |
| FROM_HERE, compositor_frame_sink_creation_callback_.callback()); |
| } |
| } |
| |
| DrawResult SingleThreadProxy::DoComposite(LayerTreeHostImpl::FrameData* frame) { |
| TRACE_EVENT0("cc", "SingleThreadProxy::DoComposite"); |
| |
| DrawResult draw_result; |
| bool draw_frame; |
| { |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| base::AutoReset<bool> mark_inside(&inside_draw_, true); |
| |
| // We guard PrepareToDraw() with CanDraw() because it always returns a valid |
| // frame, so can only be used when such a frame is possible. Since |
| // DrawLayers() depends on the result of PrepareToDraw(), it is guarded on |
| // CanDraw() as well. |
| if (!ShouldComposite()) { |
| return DRAW_ABORTED_CANT_DRAW; |
| } |
| |
| // This CapturePostTasks should be destroyed before |
| // DidCommitAndDrawFrame() is called since that goes out to the |
| // embedder, and we want the embedder to receive its callbacks before that. |
| // NOTE: This maintains consistent ordering with the ThreadProxy since |
| // the DidCommitAndDrawFrame() must be post-tasked from the impl thread |
| // there as the main thread is not blocked, so any posted tasks inside |
| // the swap buffers will execute first. |
| DebugScopedSetMainThreadBlocked main_thread_blocked(task_runner_provider_); |
| BlockingTaskRunner::CapturePostTasks blocked( |
| task_runner_provider_->blocking_main_thread_task_runner()); |
| |
| draw_result = layer_tree_host_impl_->PrepareToDraw(frame); |
| draw_frame = draw_result == DRAW_SUCCESS; |
| if (draw_frame) { |
| if (layer_tree_host_impl_->DrawLayers(frame)) { |
| if (scheduler_on_impl_thread_) |
| // Drawing implies we submitted a frame to the CompositorFrameSink. |
| scheduler_on_impl_thread_->DidSubmitCompositorFrame(); |
| single_thread_client_->DidSubmitCompositorFrame(); |
| } |
| } |
| layer_tree_host_impl_->DidDrawAllLayers(*frame); |
| |
| bool start_ready_animations = draw_frame; |
| layer_tree_host_impl_->UpdateAnimationState(start_ready_animations); |
| } |
| DidCommitAndDrawFrame(); |
| |
| return draw_result; |
| } |
| |
| void SingleThreadProxy::DidCommitAndDrawFrame() { |
| if (next_frame_is_newly_committed_frame_) { |
| DebugScopedSetMainThread main(task_runner_provider_); |
| next_frame_is_newly_committed_frame_ = false; |
| layer_tree_host_->DidCommitAndDrawFrame(); |
| } |
| } |
| |
| bool SingleThreadProxy::MainFrameWillHappenForTesting() { |
| if (!scheduler_on_impl_thread_) |
| return false; |
| return scheduler_on_impl_thread_->MainFrameForTestingWillHappen(); |
| } |
| |
| void SingleThreadProxy::WillBeginImplFrame(const BeginFrameArgs& args) { |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| #if DCHECK_IS_ON() |
| DCHECK(!inside_impl_frame_) |
| << "WillBeginImplFrame called while already inside an impl frame!"; |
| inside_impl_frame_ = true; |
| #endif |
| layer_tree_host_impl_->WillBeginImplFrame(args); |
| } |
| |
| void SingleThreadProxy::ScheduledActionSendBeginMainFrame( |
| const BeginFrameArgs& begin_frame_args) { |
| TRACE_EVENT0("cc", "SingleThreadProxy::ScheduledActionSendBeginMainFrame"); |
| #if DCHECK_IS_ON() |
| // Although this proxy is single-threaded, it's problematic to synchronously |
| // have BeginMainFrame happen after ScheduledActionSendBeginMainFrame. This |
| // could cause a commit to occur in between a series of SetNeedsCommit calls |
| // (i.e. property modifications) causing some to fall on one frame and some to |
| // fall on the next. Doing it asynchronously instead matches the semantics of |
| // ThreadProxy::SetNeedsCommit where SetNeedsCommit will not cause a |
| // synchronous commit. |
| DCHECK(inside_impl_frame_) |
| << "BeginMainFrame should only be sent inside a BeginImplFrame"; |
| #endif |
| |
| task_runner_provider_->MainThreadTaskRunner()->PostTask( |
| FROM_HERE, base::Bind(&SingleThreadProxy::BeginMainFrame, |
| weak_factory_.GetWeakPtr(), begin_frame_args)); |
| } |
| |
| void SingleThreadProxy::SendBeginMainFrameNotExpectedSoon() { |
| layer_tree_host_->BeginMainFrameNotExpectedSoon(); |
| } |
| |
| void SingleThreadProxy::BeginMainFrame(const BeginFrameArgs& begin_frame_args) { |
| if (scheduler_on_impl_thread_) { |
| scheduler_on_impl_thread_->NotifyBeginMainFrameStarted( |
| base::TimeTicks::Now()); |
| } |
| |
| commit_requested_ = false; |
| animate_requested_ = false; |
| |
| if (defer_commits_) { |
| TRACE_EVENT_INSTANT0("cc", "EarlyOut_DeferCommit", |
| TRACE_EVENT_SCOPE_THREAD); |
| BeginMainFrameAbortedOnImplThread( |
| CommitEarlyOutReason::ABORTED_DEFERRED_COMMIT); |
| return; |
| } |
| |
| // This checker assumes NotifyReadyToCommit in this stack causes a synchronous |
| // commit. |
| ScopedAbortRemainingSwapPromises swap_promise_checker( |
| layer_tree_host_->GetSwapPromiseManager()); |
| |
| if (!layer_tree_host_->IsVisible()) { |
| TRACE_EVENT_INSTANT0("cc", "EarlyOut_NotVisible", TRACE_EVENT_SCOPE_THREAD); |
| BeginMainFrameAbortedOnImplThread( |
| CommitEarlyOutReason::ABORTED_NOT_VISIBLE); |
| return; |
| } |
| |
| // Prevent new commits from being requested inside DoBeginMainFrame. |
| // Note: We do not want to prevent SetNeedsAnimate from requesting |
| // a commit here. |
| commit_requested_ = true; |
| |
| DoBeginMainFrame(begin_frame_args); |
| } |
| |
| void SingleThreadProxy::DoBeginMainFrame( |
| const BeginFrameArgs& begin_frame_args) { |
| // In the single-threaded case, the scale deltas should never be touched on |
| // the impl layer tree. However, impl-side scroll deltas may be manipulated |
| // directly via the InputHandler on the UI thread. |
| std::unique_ptr<ScrollAndScaleSet> scroll_info = |
| layer_tree_host_impl_->ProcessScrollDeltas(); |
| DCHECK_EQ(1.f, scroll_info->page_scale_delta); |
| layer_tree_host_->ApplyScrollAndScale(scroll_info.get()); |
| |
| layer_tree_host_->WillBeginMainFrame(); |
| layer_tree_host_->BeginMainFrame(begin_frame_args); |
| layer_tree_host_->AnimateLayers(begin_frame_args.frame_time); |
| layer_tree_host_->RequestMainFrameUpdate(); |
| |
| // New commits requested inside UpdateLayers should be respected. |
| commit_requested_ = false; |
| |
| layer_tree_host_->UpdateLayers(); |
| |
| // TODO(enne): SingleThreadProxy does not support cancelling commits yet, |
| // search for CommitEarlyOutReason::FINISHED_NO_UPDATES inside |
| // thread_proxy.cc |
| if (scheduler_on_impl_thread_) |
| scheduler_on_impl_thread_->NotifyReadyToCommit(); |
| } |
| |
| void SingleThreadProxy::BeginMainFrameAbortedOnImplThread( |
| CommitEarlyOutReason reason) { |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| DCHECK(scheduler_on_impl_thread_->CommitPending()); |
| DCHECK(!layer_tree_host_impl_->pending_tree()); |
| |
| std::vector<std::unique_ptr<SwapPromise>> empty_swap_promises; |
| layer_tree_host_impl_->BeginMainFrameAborted(reason, |
| std::move(empty_swap_promises)); |
| scheduler_on_impl_thread_->BeginMainFrameAborted(reason); |
| } |
| |
| DrawResult SingleThreadProxy::ScheduledActionDrawIfPossible() { |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| LayerTreeHostImpl::FrameData frame; |
| return DoComposite(&frame); |
| } |
| |
| DrawResult SingleThreadProxy::ScheduledActionDrawForced() { |
| NOTREACHED(); |
| return INVALID_RESULT; |
| } |
| |
| void SingleThreadProxy::ScheduledActionCommit() { |
| DebugScopedSetMainThread main(task_runner_provider_); |
| DoCommit(); |
| } |
| |
| void SingleThreadProxy::ScheduledActionActivateSyncTree() { |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| layer_tree_host_impl_->ActivateSyncTree(); |
| } |
| |
| void SingleThreadProxy::ScheduledActionBeginCompositorFrameSinkCreation() { |
| DebugScopedSetMainThread main(task_runner_provider_); |
| DCHECK(scheduler_on_impl_thread_); |
| // If possible, create the output surface in a post task. Synchronously |
| // creating the output surface makes tests more awkward since this differs |
| // from the ThreadProxy behavior. However, sometimes there is no |
| // task runner. |
| if (task_runner_provider_->MainThreadTaskRunner()) { |
| ScheduleRequestNewCompositorFrameSink(); |
| } else { |
| RequestNewCompositorFrameSink(); |
| } |
| } |
| |
| void SingleThreadProxy::ScheduledActionPrepareTiles() { |
| TRACE_EVENT0("cc", "SingleThreadProxy::ScheduledActionPrepareTiles"); |
| DebugScopedSetImplThread impl(task_runner_provider_); |
| layer_tree_host_impl_->PrepareTiles(); |
| } |
| |
| void SingleThreadProxy::ScheduledActionInvalidateCompositorFrameSink() { |
| NOTREACHED(); |
| } |
| |
| void SingleThreadProxy::UpdateBrowserControlsState( |
| BrowserControlsState constraints, |
| BrowserControlsState current, |
| bool animate) { |
| NOTREACHED() << "Browser Controls are used only in threaded mode"; |
| } |
| |
| void SingleThreadProxy::DidFinishImplFrame() { |
| layer_tree_host_impl_->DidFinishImplFrame(); |
| #if DCHECK_IS_ON() |
| DCHECK(inside_impl_frame_) |
| << "DidFinishImplFrame called while not inside an impl frame!"; |
| inside_impl_frame_ = false; |
| #endif |
| } |
| |
| } // namespace cc |