blob: 90464bcbf6841ec89840fcca970756338ff39b21 [file] [log] [blame]
// Copyright 2013 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 "base/callback.h"
#include "base/time/time.h"
#include "ui/gfx/gfx_export.h"
namespace gfx {
class GFX_EXPORT VSyncProvider {
virtual ~VSyncProvider() {}
typedef base::Callback<
void(const base::TimeTicks timebase, const base::TimeDelta interval)>
// Get the time of the most recent screen refresh, along with the time
// between consecutive refreshes. The callback is called as soon as
// the data is available: it could be immediately from this method,
// later via a PostTask to the current MessageLoop, or never (if we have
// no data source). We provide the strong guarantee that the callback will
// not be called once the instance of this class is destroyed.
virtual void GetVSyncParameters(const UpdateVSyncCallback& callback) = 0;
} // namespace gfx