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102 lines
2.2 KiB
C++
102 lines
2.2 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef FLUTTER_FLOW_INSTRUMENTATION_H_
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#define FLUTTER_FLOW_INSTRUMENTATION_H_
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#include <vector>
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#include "flutter/fml/macros.h"
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#include "flutter/fml/time/time_delta.h"
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#include "flutter/fml/time/time_point.h"
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#include "third_party/skia/include/core/SkCanvas.h"
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namespace flutter {
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class Stopwatch {
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public:
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Stopwatch(fml::Milliseconds frame_budget = fml::kDefaultFrameBudget);
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~Stopwatch();
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const fml::TimeDelta& LastLap() const;
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fml::TimeDelta CurrentLap() const { return fml::TimePoint::Now() - start_; }
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fml::TimeDelta MaxDelta() const;
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fml::TimeDelta AverageDelta() const;
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void InitVisualizeSurface(const SkRect& rect) const;
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void Visualize(SkCanvas* canvas, const SkRect& rect) const;
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void Start();
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void Stop();
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void SetLapTime(const fml::TimeDelta& delta);
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private:
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inline double UnitFrameInterval(double time_ms) const;
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inline double UnitHeight(double time_ms, double max_height) const;
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fml::TimePoint start_;
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std::vector<fml::TimeDelta> laps_;
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size_t current_sample_;
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fml::Milliseconds frame_budget_;
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// Mutable data cache for performance optimization of the graphs. Prevents
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// expensive redrawing of old data.
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mutable bool cache_dirty_;
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mutable sk_sp<SkSurface> visualize_cache_surface_;
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mutable size_t prev_drawn_sample_index_;
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FML_DISALLOW_COPY_AND_ASSIGN(Stopwatch);
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};
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class Counter {
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public:
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Counter() : count_(0) {}
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size_t count() const { return count_; }
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void Reset(size_t count = 0) { count_ = count; }
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void Increment(size_t count = 1) { count_ += count; }
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private:
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size_t count_;
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FML_DISALLOW_COPY_AND_ASSIGN(Counter);
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};
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class CounterValues {
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public:
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CounterValues();
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~CounterValues();
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void Add(int64_t value);
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void Visualize(SkCanvas* canvas, const SkRect& rect) const;
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int64_t GetCurrentValue() const;
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int64_t GetMaxValue() const;
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int64_t GetMinValue() const;
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private:
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std::vector<int64_t> values_;
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size_t current_sample_;
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FML_DISALLOW_COPY_AND_ASSIGN(CounterValues);
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};
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} // namespace flutter
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#endif // FLUTTER_FLOW_INSTRUMENTATION_H_
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