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1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CC_DEBUG_PAINT_TIME_COUNTER_H_ | |
6 #define CC_DEBUG_PAINT_TIME_COUNTER_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "base/memory/scoped_ptr.h" | |
10 #include "base/time/time.h" | |
11 #include "cc/debug/ring_buffer.h" | |
12 | |
13 namespace cc { | |
14 | |
15 // Maintains a history of paint times for each frame | |
16 class PaintTimeCounter { | |
17 public: | |
18 static scoped_ptr<PaintTimeCounter> Create(); | |
19 | |
20 size_t HistorySize() const { return ring_buffer_.BufferSize(); } | |
21 | |
22 // n = 0 returns the oldest and | |
23 // n = PaintTimeHistorySize() - 1 the most recent paint time. | |
24 base::TimeDelta GetPaintTimeOfRecentFrame(const size_t& n) const; | |
25 | |
26 void SavePaintTime(const base::TimeDelta& total_paint_time); | |
27 void GetMinAndMaxPaintTime(base::TimeDelta* min, base::TimeDelta* max) const; | |
28 | |
29 void ClearHistory(); | |
30 | |
31 typedef RingBuffer<base::TimeDelta, 200> RingBufferType; | |
32 RingBufferType::Iterator Begin() const { return ring_buffer_.Begin(); } | |
33 RingBufferType::Iterator End() const { return ring_buffer_.End(); } | |
34 | |
35 private: | |
36 PaintTimeCounter(); | |
37 | |
38 RingBufferType ring_buffer_; | |
39 | |
40 DISALLOW_COPY_AND_ASSIGN(PaintTimeCounter); | |
41 }; | |
42 | |
43 } // namespace cc | |
44 | |
45 #endif // CC_DEBUG_PAINT_TIME_COUNTER_H_ | |
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