blob: 8d143eed2c5f51b734917041e97411724f980bc2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
// 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() {
return base::TimeTicks::IsHighResNowFastAndReliable();
}
};
}
#endif // UI_GFX_FRAME_TIME_H
|
