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// 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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