1 | // Copyright 2013 The Flutter 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 FLUTTER_FLOW_INSTRUMENTATION_H_ |
6 | #define FLUTTER_FLOW_INSTRUMENTATION_H_ |
7 | |
8 | #include <vector> |
9 | |
10 | #include "flutter/fml/macros.h" |
11 | #include "flutter/fml/time/time_delta.h" |
12 | #include "flutter/fml/time/time_point.h" |
13 | #include "third_party/skia/include/core/SkCanvas.h" |
14 | |
15 | namespace flutter { |
16 | |
17 | class Stopwatch { |
18 | public: |
19 | Stopwatch(fml::Milliseconds frame_budget = fml::kDefaultFrameBudget); |
20 | |
21 | ~Stopwatch(); |
22 | |
23 | const fml::TimeDelta& LastLap() const; |
24 | |
25 | fml::TimeDelta CurrentLap() const { return fml::TimePoint::Now() - start_; } |
26 | |
27 | fml::TimeDelta MaxDelta() const; |
28 | |
29 | fml::TimeDelta AverageDelta() const; |
30 | |
31 | void InitVisualizeSurface(const SkRect& rect) const; |
32 | |
33 | void Visualize(SkCanvas* canvas, const SkRect& rect) const; |
34 | |
35 | void Start(); |
36 | |
37 | void Stop(); |
38 | |
39 | void SetLapTime(const fml::TimeDelta& delta); |
40 | |
41 | private: |
42 | inline double UnitFrameInterval(double time_ms) const; |
43 | inline double UnitHeight(double time_ms, double max_height) const; |
44 | |
45 | fml::TimePoint start_; |
46 | std::vector<fml::TimeDelta> laps_; |
47 | size_t current_sample_; |
48 | |
49 | fml::Milliseconds frame_budget_; |
50 | |
51 | // Mutable data cache for performance optimization of the graphs. Prevents |
52 | // expensive redrawing of old data. |
53 | mutable bool cache_dirty_; |
54 | mutable sk_sp<SkSurface> visualize_cache_surface_; |
55 | mutable size_t prev_drawn_sample_index_; |
56 | |
57 | FML_DISALLOW_COPY_AND_ASSIGN(Stopwatch); |
58 | }; |
59 | |
60 | class Counter { |
61 | public: |
62 | Counter() : count_(0) {} |
63 | |
64 | size_t count() const { return count_; } |
65 | |
66 | void Reset(size_t count = 0) { count_ = count; } |
67 | |
68 | void Increment(size_t count = 1) { count_ += count; } |
69 | |
70 | private: |
71 | size_t count_; |
72 | |
73 | FML_DISALLOW_COPY_AND_ASSIGN(Counter); |
74 | }; |
75 | |
76 | class CounterValues { |
77 | public: |
78 | CounterValues(); |
79 | |
80 | ~CounterValues(); |
81 | |
82 | void Add(int64_t value); |
83 | |
84 | void Visualize(SkCanvas* canvas, const SkRect& rect) const; |
85 | |
86 | int64_t GetCurrentValue() const; |
87 | |
88 | int64_t GetMaxValue() const; |
89 | |
90 | int64_t GetMinValue() const; |
91 | |
92 | private: |
93 | std::vector<int64_t> values_; |
94 | size_t current_sample_; |
95 | |
96 | FML_DISALLOW_COPY_AND_ASSIGN(CounterValues); |
97 | }; |
98 | |
99 | } // namespace flutter |
100 | |
101 | #endif // FLUTTER_FLOW_INSTRUMENTATION_H_ |
102 |