blob: 672f1c38db2ef18d46007d44c7b115d625b79882 [file] [log] [blame]
// Copyright 2015 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/proxy_impl.h"
#include <string.h>
#include <algorithm>
#include <string>
#include "base/auto_reset.h"
#include "base/bind.h"
#include "base/trace_event/trace_event.h"
#include "base/trace_event/traced_value.h"
#include "cc/base/devtools_instrumentation.h"
#include "cc/benchmarks/benchmark_instrumentation.h"
#include "cc/input/browser_controls_offset_manager.h"
#include "cc/paint/paint_worklet_layer_painter.h"
#include "cc/scheduler/compositor_timing_history.h"
#include "cc/trees/layer_tree_frame_sink.h"
#include "cc/trees/layer_tree_host.h"
#include "cc/trees/layer_tree_impl.h"
#include "cc/trees/mutator_host.h"
#include "cc/trees/proxy_main.h"
#include "cc/trees/render_frame_metadata_observer.h"
#include "cc/trees/task_runner_provider.h"
#include "components/viz/common/frame_sinks/delay_based_time_source.h"
#include "components/viz/common/gpu/context_provider.h"
#include "gpu/command_buffer/client/gles2_interface.h"
#include "services/metrics/public/cpp/ukm_recorder.h"
#include "ui/gfx/presentation_feedback.h"
namespace cc {
namespace {
// Measured in seconds.
const double kSmoothnessTakesPriorityExpirationDelay = 0.25;
unsigned int nextBeginFrameId = 0;
} // namespace
// Ensures that a CompletionEvent is always signaled.
class ScopedCompletionEvent {
public:
explicit ScopedCompletionEvent(CompletionEvent* event) : event_(event) {}
~ScopedCompletionEvent() { event_->Signal(); }
private:
CompletionEvent* const event_;
DISALLOW_COPY_AND_ASSIGN(ScopedCompletionEvent);
};
ProxyImpl::ProxyImpl(base::WeakPtr<ProxyMain> proxy_main_weak_ptr,
LayerTreeHost* layer_tree_host,
TaskRunnerProvider* task_runner_provider)
: layer_tree_host_id_(layer_tree_host->GetId()),
commit_completion_waits_for_activation_(false),
next_frame_is_newly_committed_frame_(false),
inside_draw_(false),
input_throttled_until_commit_(false),
task_runner_provider_(task_runner_provider),
smoothness_priority_expiration_notifier_(
task_runner_provider->ImplThreadTaskRunner(),
base::BindRepeating(&ProxyImpl::RenewTreePriority,
base::Unretained(this)),
base::TimeDelta::FromSecondsD(
kSmoothnessTakesPriorityExpirationDelay)),
rendering_stats_instrumentation_(
layer_tree_host->rendering_stats_instrumentation()),
proxy_main_weak_ptr_(proxy_main_weak_ptr) {
TRACE_EVENT0("cc", "ProxyImpl::ProxyImpl");
DCHECK(IsImplThread());
DCHECK(IsMainThreadBlocked());
// Double checking we set this correctly since double->int truncations are
// silent and have been done mistakenly: crbug.com/568120.
DCHECK(!smoothness_priority_expiration_notifier_.delay().is_zero());
host_impl_ = layer_tree_host->CreateLayerTreeHostImpl(this);
const LayerTreeSettings& settings = layer_tree_host->GetSettings();
send_compositor_frame_ack_ = settings.send_compositor_frame_ack;
SchedulerSettings scheduler_settings(settings.ToSchedulerSettings());
std::unique_ptr<CompositorTimingHistory> compositor_timing_history(
new CompositorTimingHistory(
scheduler_settings.using_synchronous_renderer_compositor,
CompositorTimingHistory::RENDERER_UMA,
rendering_stats_instrumentation_));
scheduler_.reset(new Scheduler(this, scheduler_settings, layer_tree_host_id_,
task_runner_provider_->ImplThreadTaskRunner(),
std::move(compositor_timing_history)));
DCHECK_EQ(scheduler_->visible(), host_impl_->visible());
}
ProxyImpl::BlockedMainCommitOnly::BlockedMainCommitOnly()
: layer_tree_host(nullptr) {}
ProxyImpl::BlockedMainCommitOnly::~BlockedMainCommitOnly() = default;
ProxyImpl::~ProxyImpl() {
TRACE_EVENT0("cc", "ProxyImpl::~ProxyImpl");
DCHECK(IsImplThread());
DCHECK(IsMainThreadBlocked());
// Prevent the scheduler from performing actions while we're in an
// inconsistent state.
scheduler_->Stop();
// Take away the LayerTreeFrameSink before destroying things so it doesn't
// try to call into its client mid-shutdown.
host_impl_->ReleaseLayerTreeFrameSink();
// It is important to destroy LTHI before the Scheduler since it can make
// callbacks that access it during destruction cleanup.
host_impl_ = nullptr;
scheduler_ = nullptr;
// We need to explicitly shutdown the notifier to destroy any weakptrs it is
// holding while still on the compositor thread. This also ensures any
// callbacks holding a ProxyImpl pointer are cancelled.
smoothness_priority_expiration_notifier_.Shutdown();
}
void ProxyImpl::InitializeMutatorOnImpl(
std::unique_ptr<LayerTreeMutator> mutator) {
TRACE_EVENT0("cc", "ProxyImpl::InitializeMutatorOnImpl");
DCHECK(IsImplThread());
host_impl_->SetLayerTreeMutator(std::move(mutator));
}
void ProxyImpl::InitializePaintWorkletLayerPainterOnImpl(
std::unique_ptr<PaintWorkletLayerPainter> painter) {
TRACE_EVENT0("cc", "ProxyImpl::InitializePaintWorkletLayerPainterOnImpl");
DCHECK(IsImplThread());
host_impl_->SetPaintWorkletLayerPainter(std::move(painter));
}
void ProxyImpl::UpdateBrowserControlsStateOnImpl(
BrowserControlsState constraints,
BrowserControlsState current,
bool animate) {
DCHECK(IsImplThread());
host_impl_->browser_controls_manager()->UpdateBrowserControlsState(
constraints, current, animate);
}
void ProxyImpl::InitializeLayerTreeFrameSinkOnImpl(
LayerTreeFrameSink* layer_tree_frame_sink,
base::WeakPtr<ProxyMain> proxy_main_frame_sink_bound_weak_ptr) {
TRACE_EVENT0("cc", "ProxyImpl::InitializeLayerTreeFrameSinkOnImplThread");
DCHECK(IsImplThread());
proxy_main_frame_sink_bound_weak_ptr_ = proxy_main_frame_sink_bound_weak_ptr;
LayerTreeHostImpl* host_impl = host_impl_.get();
bool success = host_impl->InitializeFrameSink(layer_tree_frame_sink);
MainThreadTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&ProxyMain::DidInitializeLayerTreeFrameSink,
proxy_main_weak_ptr_, success));
if (success)
scheduler_->DidCreateAndInitializeLayerTreeFrameSink();
}
void ProxyImpl::SetInputThrottledUntilCommitOnImpl(bool is_throttled) {
DCHECK(IsImplThread());
if (is_throttled == input_throttled_until_commit_)
return;
input_throttled_until_commit_ = is_throttled;
RenewTreePriority();
}
void ProxyImpl::SetDeferBeginMainFrameOnImpl(
bool defer_begin_main_frame) const {
DCHECK(IsImplThread());
scheduler_->SetDeferBeginMainFrame(defer_begin_main_frame);
}
void ProxyImpl::SetNeedsRedrawOnImpl(const gfx::Rect& damage_rect) {
DCHECK(IsImplThread());
host_impl_->SetViewportDamage(damage_rect);
SetNeedsRedrawOnImplThread();
}
void ProxyImpl::SetNeedsCommitOnImpl() {
DCHECK(IsImplThread());
SetNeedsCommitOnImplThread();
}
void ProxyImpl::BeginMainFrameAbortedOnImpl(
CommitEarlyOutReason reason,
base::TimeTicks main_thread_start_time,
std::vector<std::unique_ptr<SwapPromise>> swap_promises) {
TRACE_EVENT1("cc", "ProxyImpl::BeginMainFrameAbortedOnImplThread", "reason",
CommitEarlyOutReasonToString(reason));
DCHECK(IsImplThread());
DCHECK(scheduler_->CommitPending());
if (CommitEarlyOutHandledCommit(reason)) {
SetInputThrottledUntilCommitOnImpl(false);
}
host_impl_->BeginMainFrameAborted(reason, std::move(swap_promises));
scheduler_->NotifyBeginMainFrameStarted(main_thread_start_time);
scheduler_->BeginMainFrameAborted(reason);
}
void ProxyImpl::SetVisibleOnImpl(bool visible) {
TRACE_EVENT1("cc", "ProxyImpl::SetVisibleOnImplThread", "visible", visible);
DCHECK(IsImplThread());
host_impl_->SetVisible(visible);
scheduler_->SetVisible(visible);
}
void ProxyImpl::ReleaseLayerTreeFrameSinkOnImpl(CompletionEvent* completion) {
DCHECK(IsImplThread());
// Unlike DidLoseLayerTreeFrameSinkOnImplThread, we don't need to call
// LayerTreeHost::DidLoseLayerTreeFrameSink since it already knows.
scheduler_->DidLoseLayerTreeFrameSink();
host_impl_->ReleaseLayerTreeFrameSink();
completion->Signal();
}
void ProxyImpl::FinishGLOnImpl(CompletionEvent* completion) {
TRACE_EVENT0("cc", "ProxyImpl::FinishGLOnImplThread");
DCHECK(IsImplThread());
if (host_impl_->layer_tree_frame_sink()) {
viz::ContextProvider* context_provider =
host_impl_->layer_tree_frame_sink()->context_provider();
if (context_provider)
context_provider->ContextGL()->Finish();
}
completion->Signal();
}
void ProxyImpl::MainFrameWillHappenOnImplForTesting(
CompletionEvent* completion,
bool* main_frame_will_happen) {
DCHECK(IsImplThread());
if (host_impl_->layer_tree_frame_sink()) {
*main_frame_will_happen = scheduler_->MainFrameForTestingWillHappen();
} else {
*main_frame_will_happen = false;
}
completion->Signal();
}
void ProxyImpl::RequestBeginMainFrameNotExpected(bool new_state) {
DCHECK(IsImplThread());
DCHECK(scheduler_);
TRACE_EVENT1("cc", "ProxyImpl::RequestBeginMainFrameNotExpected", "new_state",
new_state);
scheduler_->SetMainThreadWantsBeginMainFrameNotExpected(new_state);
}
void ProxyImpl::NotifyReadyToCommitOnImpl(
CompletionEvent* completion,
LayerTreeHost* layer_tree_host,
base::TimeTicks main_thread_start_time,
bool hold_commit_for_activation) {
TRACE_EVENT0("cc", "ProxyImpl::NotifyReadyToCommitOnImpl");
DCHECK(!commit_completion_event_);
DCHECK(IsImplThread() && IsMainThreadBlocked());
DCHECK(scheduler_);
DCHECK(scheduler_->CommitPending());
if (!host_impl_) {
TRACE_EVENT_INSTANT0("cc", "EarlyOut_NoLayerTree",
TRACE_EVENT_SCOPE_THREAD);
completion->Signal();
return;
}
// Ideally, we should inform to impl thread when BeginMainFrame is started.
// But, we can avoid a PostTask in here.
scheduler_->NotifyBeginMainFrameStarted(main_thread_start_time);
host_impl_->ReadyToCommit();
commit_completion_event_ =
std::make_unique<ScopedCompletionEvent>(completion);
commit_completion_waits_for_activation_ = hold_commit_for_activation;
DCHECK(!blocked_main_commit().layer_tree_host);
blocked_main_commit().layer_tree_host = layer_tree_host;
scheduler_->NotifyReadyToCommit();
}
void ProxyImpl::DidLoseLayerTreeFrameSinkOnImplThread() {
TRACE_EVENT0("cc", "ProxyImpl::DidLoseLayerTreeFrameSinkOnImplThread");
DCHECK(IsImplThread());
MainThreadTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&ProxyMain::DidLoseLayerTreeFrameSink,
proxy_main_weak_ptr_));
scheduler_->DidLoseLayerTreeFrameSink();
}
void ProxyImpl::SetBeginFrameSource(viz::BeginFrameSource* source) {
// During shutdown, destroying the LayerTreeFrameSink may unset the
// viz::BeginFrameSource.
if (scheduler_) {
// TODO(enne): this overrides any preexisting begin frame source. Those
// other sources will eventually be removed and this will be the only path.
scheduler_->SetBeginFrameSource(source);
}
}
void ProxyImpl::DidReceiveCompositorFrameAckOnImplThread() {
TRACE_EVENT0("cc,benchmark",
"ProxyImpl::DidReceiveCompositorFrameAckOnImplThread");
DCHECK(IsImplThread());
scheduler_->DidReceiveCompositorFrameAck();
if (send_compositor_frame_ack_) {
MainThreadTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&ProxyMain::DidReceiveCompositorFrameAck,
proxy_main_frame_sink_bound_weak_ptr_));
}
}
void ProxyImpl::OnCanDrawStateChanged(bool can_draw) {
TRACE_EVENT1("cc", "ProxyImpl::OnCanDrawStateChanged", "can_draw", can_draw);
DCHECK(IsImplThread());
scheduler_->SetCanDraw(can_draw);
}
void ProxyImpl::NotifyReadyToActivate() {
TRACE_EVENT0("cc", "ProxyImpl::NotifyReadyToActivate");
DCHECK(IsImplThread());
scheduler_->NotifyReadyToActivate();
}
void ProxyImpl::NotifyReadyToDraw() {
TRACE_EVENT0("cc", "ProxyImpl::NotifyReadyToDraw");
DCHECK(IsImplThread());
scheduler_->NotifyReadyToDraw();
}
void ProxyImpl::SetNeedsRedrawOnImplThread() {
TRACE_EVENT0("cc", "ProxyImpl::SetNeedsRedrawOnImplThread");
DCHECK(IsImplThread());
scheduler_->SetNeedsRedraw();
}
void ProxyImpl::SetNeedsOneBeginImplFrameOnImplThread() {
TRACE_EVENT0("cc", "ProxyImpl::SetNeedsOneBeginImplFrameOnImplThread");
DCHECK(IsImplThread());
scheduler_->SetNeedsOneBeginImplFrame();
}
void ProxyImpl::SetNeedsPrepareTilesOnImplThread() {
DCHECK(IsImplThread());
scheduler_->SetNeedsPrepareTiles();
}
void ProxyImpl::SetNeedsCommitOnImplThread() {
TRACE_EVENT0("cc", "ProxyImpl::SetNeedsCommitOnImplThread");
DCHECK(IsImplThread());
scheduler_->SetNeedsBeginMainFrame();
}
void ProxyImpl::SetVideoNeedsBeginFrames(bool needs_begin_frames) {
TRACE_EVENT1("cc", "ProxyImpl::SetVideoNeedsBeginFrames",
"needs_begin_frames", needs_begin_frames);
DCHECK(IsImplThread());
// In tests the layer tree is destroyed after the scheduler is.
if (scheduler_)
scheduler_->SetVideoNeedsBeginFrames(needs_begin_frames);
}
void ProxyImpl::PostAnimationEventsToMainThreadOnImplThread(
std::unique_ptr<MutatorEvents> events) {
TRACE_EVENT0("cc", "ProxyImpl::PostAnimationEventsToMainThreadOnImplThread");
DCHECK(IsImplThread());
MainThreadTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&ProxyMain::SetAnimationEvents,
proxy_main_weak_ptr_, base::Passed(&events)));
}
size_t ProxyImpl::CompositedAnimationsCount() const {
return host_impl_->mutator_host()->CompositedAnimationsCount();
}
size_t ProxyImpl::MainThreadAnimationsCount() const {
return host_impl_->mutator_host()->MainThreadAnimationsCount();
}
bool ProxyImpl::CurrentFrameHadRAF() const {
return host_impl_->mutator_host()->CurrentFrameHadRAF();
}
bool ProxyImpl::NextFrameHasPendingRAF() const {
return host_impl_->mutator_host()->NextFrameHasPendingRAF();
}
bool ProxyImpl::IsInsideDraw() {
return inside_draw_;
}
void ProxyImpl::RenewTreePriority() {
DCHECK(IsImplThread());
const bool user_interaction_in_progress =
host_impl_->pinch_gesture_active() ||
host_impl_->page_scale_animation_active() ||
host_impl_->IsActivelyScrolling();
if (host_impl_->ukm_manager()) {
host_impl_->ukm_manager()->SetUserInteractionInProgress(
user_interaction_in_progress);
}
// Schedule expiration if smoothness currently takes priority.
if (user_interaction_in_progress)
smoothness_priority_expiration_notifier_.Schedule();
// We use the same priority for both trees by default.
TreePriority tree_priority = SAME_PRIORITY_FOR_BOTH_TREES;
// Smoothness takes priority if we have an expiration for it scheduled.
if (smoothness_priority_expiration_notifier_.HasPendingNotification())
tree_priority = SMOOTHNESS_TAKES_PRIORITY;
// New content always takes priority when ui resources have been evicted.
if (host_impl_->active_tree()->GetDeviceViewport().size().IsEmpty() ||
host_impl_->EvictedUIResourcesExist() || input_throttled_until_commit_) {
// Once we enter NEW_CONTENTS_TAKES_PRIORITY mode, visible tiles on active
// tree might be freed. We need to set RequiresHighResToDraw to ensure that
// high res tiles will be required to activate pending tree.
host_impl_->SetRequiresHighResToDraw();
tree_priority = NEW_CONTENT_TAKES_PRIORITY;
}
host_impl_->SetTreePriority(tree_priority);
// Only put the scheduler in impl latency prioritization mode if we don't
// have a scroll listener. This gives the scroll listener a better chance of
// handling scroll updates within the same frame. The tree itself is still
// kept in prefer smoothness mode to allow checkerboarding.
ScrollHandlerState scroll_handler_state =
host_impl_->scroll_affects_scroll_handler()
? ScrollHandlerState::SCROLL_AFFECTS_SCROLL_HANDLER
: ScrollHandlerState::SCROLL_DOES_NOT_AFFECT_SCROLL_HANDLER;
scheduler_->SetTreePrioritiesAndScrollState(tree_priority,
scroll_handler_state);
}
void ProxyImpl::PostDelayedAnimationTaskOnImplThread(base::OnceClosure task,
base::TimeDelta delay) {
DCHECK(IsImplThread());
task_runner_provider_->ImplThreadTaskRunner()->PostDelayedTask(
FROM_HERE, std::move(task), delay);
}
void ProxyImpl::DidActivateSyncTree() {
TRACE_EVENT0("cc", "ProxyImpl::DidActivateSyncTreeOnImplThread");
DCHECK(IsImplThread());
if (activation_completion_event_) {
TRACE_EVENT_INSTANT0("cc", "ReleaseCommitbyActivation",
TRACE_EVENT_SCOPE_THREAD);
activation_completion_event_ = nullptr;
}
}
void ProxyImpl::WillPrepareTiles() {
DCHECK(IsImplThread());
scheduler_->WillPrepareTiles();
}
void ProxyImpl::DidPrepareTiles() {
DCHECK(IsImplThread());
scheduler_->DidPrepareTiles();
}
void ProxyImpl::DidCompletePageScaleAnimationOnImplThread() {
DCHECK(IsImplThread());
MainThreadTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&ProxyMain::DidCompletePageScaleAnimation,
proxy_main_weak_ptr_));
}
void ProxyImpl::OnDrawForLayerTreeFrameSink(bool resourceless_software_draw,
bool skip_draw) {
DCHECK(IsImplThread());
scheduler_->OnDrawForLayerTreeFrameSink(resourceless_software_draw,
skip_draw);
}
void ProxyImpl::NeedsImplSideInvalidation(bool needs_first_draw_on_activation) {
DCHECK(IsImplThread());
scheduler_->SetNeedsImplSideInvalidation(needs_first_draw_on_activation);
}
void ProxyImpl::NotifyImageDecodeRequestFinished() {
DCHECK(IsImplThread());
SetNeedsCommitOnImplThread();
}
void ProxyImpl::DidPresentCompositorFrameOnImplThread(
uint32_t frame_token,
std::vector<LayerTreeHost::PresentationTimeCallback> callbacks,
const gfx::PresentationFeedback& feedback) {
MainThreadTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&ProxyMain::DidPresentCompositorFrame,
proxy_main_weak_ptr_, frame_token,
std::move(callbacks), feedback));
}
void ProxyImpl::DidGenerateLocalSurfaceIdAllocationOnImplThread(
const viz::LocalSurfaceIdAllocation& allocation) {
MainThreadTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&ProxyMain::DidGenerateLocalSurfaceIdAllocation,
proxy_main_weak_ptr_, allocation));
}
void ProxyImpl::NotifyAnimationWorkletStateChange(
AnimationWorkletMutationState state,
ElementListType element_list_type) {
DCHECK(IsImplThread());
Scheduler::AnimationWorkletState animation_worklet_state =
(state == AnimationWorkletMutationState::STARTED)
? Scheduler::AnimationWorkletState::PROCESSING
: Scheduler::AnimationWorkletState::IDLE;
Scheduler::TreeType tree_type = (element_list_type == ElementListType::ACTIVE)
? Scheduler::TreeType::ACTIVE
: Scheduler::TreeType::PENDING;
scheduler_->NotifyAnimationWorkletStateChange(animation_worklet_state,
tree_type);
}
bool ProxyImpl::WillBeginImplFrame(const viz::BeginFrameArgs& args) {
DCHECK(IsImplThread());
return host_impl_->WillBeginImplFrame(args);
}
void ProxyImpl::DidFinishImplFrame() {
DCHECK(IsImplThread());
host_impl_->DidFinishImplFrame();
}
void ProxyImpl::DidNotProduceFrame(const viz::BeginFrameAck& ack) {
DCHECK(IsImplThread());
host_impl_->DidNotProduceFrame(ack);
}
void ProxyImpl::WillNotReceiveBeginFrame() {
DCHECK(IsImplThread());
host_impl_->DidNotNeedBeginFrame();
}
void ProxyImpl::ScheduledActionSendBeginMainFrame(
const viz::BeginFrameArgs& args) {
DCHECK(IsImplThread());
unsigned int begin_frame_id = nextBeginFrameId++;
benchmark_instrumentation::ScopedBeginFrameTask begin_frame_task(
benchmark_instrumentation::kSendBeginFrame, begin_frame_id);
std::unique_ptr<BeginMainFrameAndCommitState> begin_main_frame_state(
new BeginMainFrameAndCommitState);
begin_main_frame_state->begin_frame_id = begin_frame_id;
begin_main_frame_state->begin_frame_args = args;
begin_main_frame_state->scroll_info = host_impl_->ProcessScrollDeltas();
begin_main_frame_state->evicted_ui_resources =
host_impl_->EvictedUIResourcesExist();
begin_main_frame_state->completed_image_decode_requests =
host_impl_->TakeCompletedImageDecodeRequests();
host_impl_->WillSendBeginMainFrame();
MainThreadTaskRunner()->PostTask(
FROM_HERE,
base::BindOnce(&ProxyMain::BeginMainFrame, proxy_main_weak_ptr_,
base::Passed(&begin_main_frame_state)));
host_impl_->DidSendBeginMainFrame();
devtools_instrumentation::DidRequestMainThreadFrame(layer_tree_host_id_);
}
DrawResult ProxyImpl::ScheduledActionDrawIfPossible() {
TRACE_EVENT0("cc", "ProxyImpl::ScheduledActionDraw");
DCHECK(IsImplThread());
// The scheduler should never generate this call when it can't draw.
DCHECK(host_impl_->CanDraw());
bool forced_draw = false;
return DrawInternal(forced_draw);
}
DrawResult ProxyImpl::ScheduledActionDrawForced() {
TRACE_EVENT0("cc", "ProxyImpl::ScheduledActionDrawForced");
DCHECK(IsImplThread());
bool forced_draw = true;
return DrawInternal(forced_draw);
}
void ProxyImpl::ScheduledActionCommit() {
TRACE_EVENT0("cc", "ProxyImpl::ScheduledActionCommit");
DCHECK(IsImplThread());
DCHECK(IsMainThreadBlocked());
DCHECK(commit_completion_event_);
// Relax the cross-thread access restriction to non-thread-safe RefCount.
// It's safe since the main thread is blocked while a main-thread-bound
// compositor stuff are accessed from the impl thread.
base::ScopedAllowCrossThreadRefCountAccess
allow_cross_thread_ref_count_access;
host_impl_->BeginCommit();
blocked_main_commit().layer_tree_host->FinishCommitOnImplThread(
host_impl_.get());
// Remove the LayerTreeHost reference before the completion event is signaled
// and cleared. This is necessary since blocked_main_commit() allows access
// only while we have the completion event to ensure the main thread is
// blocked for a commit.
blocked_main_commit().layer_tree_host = nullptr;
if (commit_completion_waits_for_activation_) {
// For some layer types in impl-side painting, the commit is held until the
// sync tree is activated. It's also possible that the sync tree has
// already activated if there was no work to be done.
TRACE_EVENT_INSTANT0("cc", "HoldCommit", TRACE_EVENT_SCOPE_THREAD);
commit_completion_waits_for_activation_ = false;
activation_completion_event_ = std::move(commit_completion_event_);
}
commit_completion_event_ = nullptr;
scheduler_->DidCommit();
// Delay this step until afer the main thread has been released as it's
// often a good bit of work to update the tree and prepare the new frame.
host_impl_->CommitComplete();
SetInputThrottledUntilCommitOnImpl(false);
next_frame_is_newly_committed_frame_ = true;
}
void ProxyImpl::ScheduledActionActivateSyncTree() {
TRACE_EVENT0("cc", "ProxyImpl::ScheduledActionActivateSyncTree");
DCHECK(IsImplThread());
host_impl_->ActivateSyncTree();
}
void ProxyImpl::ScheduledActionBeginLayerTreeFrameSinkCreation() {
TRACE_EVENT0("cc",
"ProxyImpl::ScheduledActionBeginLayerTreeFrameSinkCreation");
DCHECK(IsImplThread());
MainThreadTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&ProxyMain::RequestNewLayerTreeFrameSink,
proxy_main_weak_ptr_));
}
void ProxyImpl::ScheduledActionPrepareTiles() {
TRACE_EVENT0("cc", "ProxyImpl::ScheduledActionPrepareTiles");
DCHECK(IsImplThread());
host_impl_->PrepareTiles();
}
void ProxyImpl::ScheduledActionInvalidateLayerTreeFrameSink(bool needs_redraw) {
TRACE_EVENT0("cc", "ProxyImpl::ScheduledActionInvalidateLayerTreeFrameSink");
DCHECK(IsImplThread());
host_impl_->InvalidateLayerTreeFrameSink(needs_redraw);
}
void ProxyImpl::ScheduledActionPerformImplSideInvalidation() {
TRACE_EVENT0("cc", "ProxyImpl::ScheduledActionPerformImplSideInvalidation");
DCHECK(IsImplThread());
host_impl_->InvalidateContentOnImplSide();
}
void ProxyImpl::SendBeginMainFrameNotExpectedSoon() {
DCHECK(IsImplThread());
MainThreadTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&ProxyMain::BeginMainFrameNotExpectedSoon,
proxy_main_weak_ptr_));
}
void ProxyImpl::ScheduledActionBeginMainFrameNotExpectedUntil(
base::TimeTicks time) {
DCHECK(IsImplThread());
MainThreadTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&ProxyMain::BeginMainFrameNotExpectedUntil,
proxy_main_weak_ptr_, time));
}
DrawResult ProxyImpl::DrawInternal(bool forced_draw) {
DCHECK(IsImplThread());
DCHECK(host_impl_.get());
base::AutoReset<bool> mark_inside(&inside_draw_, true);
if (host_impl_->pending_tree())
host_impl_->pending_tree()->UpdateDrawProperties();
// This method is called on a forced draw, regardless of whether we are able
// to produce a frame, as the calling site on main thread is blocked until its
// request completes, and we signal completion here. If CanDraw() is false, we
// will indicate success=false to the caller, but we must still signal
// completion to avoid deadlock.
// 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.
LayerTreeHostImpl::FrameData frame;
frame.begin_frame_ack = scheduler_->CurrentBeginFrameAckForActiveTree();
bool draw_frame = false;
DrawResult result;
if (host_impl_->CanDraw()) {
result = host_impl_->PrepareToDraw(&frame);
draw_frame = forced_draw || result == DRAW_SUCCESS;
} else {
result = DRAW_ABORTED_CANT_DRAW;
}
if (draw_frame) {
if (host_impl_->DrawLayers(&frame))
// Drawing implies we submitted a frame to the LayerTreeFrameSink.
scheduler_->DidSubmitCompositorFrame();
result = DRAW_SUCCESS;
} else {
DCHECK_NE(DRAW_SUCCESS, result);
}
host_impl_->DidDrawAllLayers(frame);
bool start_ready_animations = draw_frame;
host_impl_->UpdateAnimationState(start_ready_animations);
// Tell the main thread that the the newly-commited frame was drawn.
if (next_frame_is_newly_committed_frame_) {
next_frame_is_newly_committed_frame_ = false;
MainThreadTaskRunner()->PostTask(
FROM_HERE, base::BindOnce(&ProxyMain::DidCommitAndDrawFrame,
proxy_main_weak_ptr_));
}
DCHECK_NE(INVALID_RESULT, result);
return result;
}
bool ProxyImpl::IsImplThread() const {
return task_runner_provider_->IsImplThread();
}
bool ProxyImpl::IsMainThreadBlocked() const {
return task_runner_provider_->IsMainThreadBlocked();
}
ProxyImpl::BlockedMainCommitOnly& ProxyImpl::blocked_main_commit() {
DCHECK(IsMainThreadBlocked() && commit_completion_event_);
return main_thread_blocked_commit_vars_unsafe_;
}
base::SingleThreadTaskRunner* ProxyImpl::MainThreadTaskRunner() {
return task_runner_provider_->MainThreadTaskRunner();
}
void ProxyImpl::SetURLForUkm(const GURL& url) {
DCHECK(IsImplThread());
host_impl_->SetActiveURL(url);
}
void ProxyImpl::ClearHistory() {
DCHECK(IsImplThread());
DCHECK(IsMainThreadBlocked());
scheduler_->ClearHistory();
}
void ProxyImpl::SetRenderFrameObserver(
std::unique_ptr<RenderFrameMetadataObserver> observer) {
host_impl_->SetRenderFrameObserver(std::move(observer));
}
} // namespace cc