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// 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.
#ifndef UI_GFX_FRAME_TIME_H
#define UI_GFX_FRAME_TIME_H
#include "base/time/time.h"
#include "base/logging.h"
namespace gfx {
// FrameTime::Now() should be used to get timestamps with a timebase that
// is consistent across the graphics stack.
class FrameTime {
public:
static base::TimeTicks Now() {
if (TimestampsAreHighRes())
return base::TimeTicks::HighResNow();
return base::TimeTicks::Now();
}
#if defined(OS_WIN)
static base::TimeTicks FromQPCValue(LONGLONG qpc_value) {
DCHECK(TimestampsAreHighRes());
return base::TimeTicks::FromQPCValue(qpc_value);
}
#endif
static bool TimestampsAreHighRes() {
// This should really return base::TimeTicks::IsHighResNowFastAndReliable();
// Returning false makes sure we are only using low-res timestamps until we
// use FrameTime everywhere we need to. See crbug.com/315334
return false;
}
};
}
#endif // UI_GFX_FRAME_TIME_H
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