| // 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 CC_DEBUG_PAINT_TIME_COUNTER_H_ |
| #define CC_DEBUG_PAINT_TIME_COUNTER_H_ |
| |
| #include "base/basictypes.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/time/time.h" |
| #include "cc/debug/ring_buffer.h" |
| |
| namespace cc { |
| |
| // Maintains a history of paint times for each frame |
| class PaintTimeCounter { |
| public: |
| static scoped_ptr<PaintTimeCounter> Create(); |
| |
| size_t HistorySize() const { return ring_buffer_.BufferSize(); } |
| |
| // n = 0 returns the oldest and |
| // n = PaintTimeHistorySize() - 1 the most recent paint time. |
| base::TimeDelta GetPaintTimeOfRecentFrame(const size_t& n) const; |
| |
| void SavePaintTime(const base::TimeDelta& total_paint_time); |
| void GetMinAndMaxPaintTime(base::TimeDelta* min, base::TimeDelta* max) const; |
| |
| void ClearHistory(); |
| |
| typedef RingBuffer<base::TimeDelta, 200> RingBufferType; |
| RingBufferType::Iterator Begin() const { return ring_buffer_.Begin(); } |
| RingBufferType::Iterator End() const { return ring_buffer_.End(); } |
| |
| private: |
| PaintTimeCounter(); |
| |
| RingBufferType ring_buffer_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PaintTimeCounter); |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_DEBUG_PAINT_TIME_COUNTER_H_ |