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Unified Diff: ui/compositor/compositor_vsync_manager.cc

Issue 1040813002: Revert of Enable BeginFrame scheduling on aura (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 5 years, 9 months ago
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Index: ui/compositor/compositor_vsync_manager.cc
diff --git a/ui/compositor/compositor_vsync_manager.cc b/ui/compositor/compositor_vsync_manager.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f51847ca7bf2cf508c5d7a456bb55ee0e0dd22ba
--- /dev/null
+++ b/ui/compositor/compositor_vsync_manager.cc
@@ -0,0 +1,46 @@
+// 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 "ui/compositor/compositor_vsync_manager.h"
+
+namespace ui {
+
+CompositorVSyncManager::CompositorVSyncManager()
+ : authoritative_vsync_interval_(base::TimeDelta::FromSeconds(0)) {
+}
+
+CompositorVSyncManager::~CompositorVSyncManager() {}
+
+void CompositorVSyncManager::SetAuthoritativeVSyncInterval(
+ base::TimeDelta interval) {
+ authoritative_vsync_interval_ = interval;
+ last_interval_ = interval;
+ NotifyObservers(last_timebase_, last_interval_);
+}
+
+void CompositorVSyncManager::UpdateVSyncParameters(base::TimeTicks timebase,
+ base::TimeDelta interval) {
+ if (authoritative_vsync_interval_ != base::TimeDelta::FromSeconds(0))
+ interval = authoritative_vsync_interval_;
+ last_timebase_ = timebase;
+ last_interval_ = interval;
+ NotifyObservers(timebase, interval);
+}
+
+void CompositorVSyncManager::AddObserver(Observer* observer) {
+ observer_list_.AddObserver(observer);
+ observer->OnUpdateVSyncParameters(last_timebase_, last_interval_);
+}
+
+void CompositorVSyncManager::RemoveObserver(Observer* observer) {
+ observer_list_.RemoveObserver(observer);
+}
+
+void CompositorVSyncManager::NotifyObservers(base::TimeTicks timebase,
+ base::TimeDelta interval) {
+ FOR_EACH_OBSERVER(CompositorVSyncManager::Observer, observer_list_,
+ OnUpdateVSyncParameters(timebase, interval));
+}
+
+} // namespace ui
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