1 /* 2 * Copyright 2017 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef StatsLayer_DEFINED 9 #define StatsLayer_DEFINED 10 11 #include "SkColor.h" 12 #include "SkString.h" 13 #include "sk_app/Window.h" 14 15 class StatsLayer : public sk_app::Window::Layer { 16 public: 17 StatsLayer(); 18 void resetMeasurements(); 19 20 typedef int Timer; 21 22 Timer addTimer(const char* label, SkColor color, SkColor labelColor = 0); 23 void beginTiming(Timer); 24 void endTiming(Timer); 25 double getLastTime(Timer); 26 27 void onPaint(SkCanvas* canvas) override; 28 setDisplayScale(float scale)29 void setDisplayScale(float scale) { fDisplayScale = scale; } 30 31 private: 32 static const int kMeasurementCount = 1 << 6; // should be power of 2 for fast mod 33 struct TimerData { 34 double fTimes[kMeasurementCount]; 35 SkString fLabel; 36 SkColor fColor; 37 SkColor fLabelColor; 38 }; 39 SkTArray<TimerData> fTimers; 40 int fCurrentMeasurement; 41 double fCumulativeMeasurementTime; 42 int fCumulativeMeasurementCount; 43 float fDisplayScale; 44 }; 45 46 #endif 47