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// Copyright 2012 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 "cc/paint_time_counter.h"
namespace cc {
// static
scoped_ptr<PaintTimeCounter> PaintTimeCounter::create() {
return make_scoped_ptr(new PaintTimeCounter());
}
PaintTimeCounter::PaintTimeCounter() {
}
base::TimeDelta PaintTimeCounter::GetPaintTimeOfRecentFrame(
const size_t& n) const {
DCHECK(n < ring_buffer_.BufferSize());
if (ring_buffer_.IsFilledIndex(n))
return ring_buffer_.ReadBuffer(n);
return base::TimeDelta();
}
void PaintTimeCounter::SavePaintTime(const base::TimeDelta& total_paint_time) {
base::TimeDelta paint_time = total_paint_time - last_total_paint_time_;
if (paint_time.InMillisecondsF() > 0)
ring_buffer_.SaveToBuffer(paint_time);
last_total_paint_time_ = total_paint_time;
}
void PaintTimeCounter::GetMinAndMaxPaintTime(base::TimeDelta* min,
base::TimeDelta* max) const {
*min = base::TimeDelta::FromDays(1);
*max = base::TimeDelta();
for (size_t i = 0; i < ring_buffer_.BufferSize(); i++) {
if (ring_buffer_.IsFilledIndex(i)) {
base::TimeDelta paint_time = ring_buffer_.ReadBuffer(i);
if (paint_time < *min)
*min = paint_time;
if (paint_time > *max)
*max = paint_time;
}
}
if (*min > *max)
*min = *max;
}
} // namespace cc
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