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mojo/services/surfaces/surfaces_scheduler.cc

+// Copyright 2014 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 "mojo/services/surfaces/surfaces_scheduler.h"
+
+#include "cc/surfaces/display.h"
+
+namespace surfaces {
+
+SurfacesScheduler::SurfacesScheduler() {
+  cc::SchedulerSettings settings;
+  scheduler_ = cc::Scheduler::Create(
+      this, settings, 0, base::MessageLoop::current()->task_runner(), nullptr);
+  scheduler_->SetCanStart();
+  scheduler_->SetVisible(true);
+  scheduler_->SetCanDraw(true);
+  scheduler_->SetNeedsCommit();
+}
+
+SurfacesScheduler::~SurfacesScheduler() {
+}
+
+void SurfacesScheduler::SetNeedsDraw() {
+  // Don't tell the scheduler we need to draw if we have no active displays
+  // which can happen if we haven't initialized displays yet or if all active
+  // displays have lost their context.
+  if (!displays_.empty())
+    scheduler_->SetNeedsRedraw();
+}
+
+void SurfacesScheduler::OnVSyncParametersUpdated(base::TimeTicks timebase,
+                                                 base::TimeDelta interval) {
+  scheduler_->CommitVSyncParameters(timebase, interval);
+}
+
+void SurfacesScheduler::AddDisplay(cc::Display* display) {
+  DCHECK(displays_.find(display) == displays_.end());
+  displays_.insert(display);
+}
+
+void SurfacesScheduler::RemoveDisplay(cc::Display* display) {
+  auto it = displays_.find(display);
+  DCHECK(it != displays_.end());
+  displays_.erase(it);
+}
+
+void SurfacesScheduler::WillBeginImplFrame(const cc::BeginFrameArgs& args) {
+}
+
+void SurfacesScheduler::ScheduledActionSendBeginMainFrame() {
+  scheduler_->NotifyBeginMainFrameStarted();
+  scheduler_->NotifyReadyToCommit();
+}
+
+cc::DrawResult SurfacesScheduler::ScheduledActionDrawAndSwapIfPossible() {
+  base::TimeTicks start = base::TimeTicks::Now();
+  for (const auto& it : displays_) {
+    it->Draw();
+  }
+  base::TimeDelta duration = base::TimeTicks::Now() - start;
+
+  draw_estimate_ = (duration + draw_estimate_) / 2;
+  return cc::DRAW_SUCCESS;
+}
+
+cc::DrawResult SurfacesScheduler::ScheduledActionDrawAndSwapForced() {
+  NOTREACHED() << "ScheduledActionDrawAndSwapIfPossible always succeeds.";
+  return cc::DRAW_SUCCESS;
+}
+
+void SurfacesScheduler::ScheduledActionAnimate() {
+}
+
+void SurfacesScheduler::ScheduledActionCommit() {
+}
+
+void SurfacesScheduler::ScheduledActionActivateSyncTree() {
+}
+
+void SurfacesScheduler::ScheduledActionBeginOutputSurfaceCreation() {
+  scheduler_->DidCreateAndInitializeOutputSurface();
+}
+
+void SurfacesScheduler::ScheduledActionPrepareTiles() {
+}
+
+void SurfacesScheduler::DidAnticipatedDrawTimeChange(base::TimeTicks time) {
+}
+
+base::TimeDelta SurfacesScheduler::DrawDurationEstimate() {
+  return draw_estimate_;
+}
+
+base::TimeDelta SurfacesScheduler::BeginMainFrameToCommitDurationEstimate() {
+  return base::TimeDelta();
+}
+
+base::TimeDelta SurfacesScheduler::CommitToActivateDurationEstimate() {
+  return base::TimeDelta();
+}
+
+void SurfacesScheduler::DidBeginImplFrameDeadline() {
+}
+
+void SurfacesScheduler::SendBeginFramesToChildren(
+    const cc::BeginFrameArgs& args) {
+}
+
+void SurfacesScheduler::SendBeginMainFrameNotExpectedSoon() {
+}
+
+}  // namespace mojo