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 "include/core/SkColor.h" 12 #include "include/core/SkString.h" 13 #include "include/private/base/SkTArray.h" 14 #include "tools/sk_app/Window.h" 15 16 class SkSurface; 17 18 class StatsLayer : public sk_app::Window::Layer { 19 public: 20 StatsLayer(); 21 void resetMeasurements(); 22 23 typedef int Timer; 24 25 Timer addTimer(const char* label, SkColor color, SkColor labelColor = 0); 26 void beginTiming(Timer); 27 void endTiming(Timer); 28 29 void onPrePaint() override; 30 void onPaint(SkSurface*) override; 31 setDisplayScale(float scale)32 void setDisplayScale(float scale) { fDisplayScale = scale; } 33 34 private: 35 static const int kMeasurementCount = 1 << 6; // should be power of 2 for fast mod 36 struct TimerData { 37 double fTimes[kMeasurementCount]; 38 SkString fLabel; 39 SkColor fColor; 40 SkColor fLabelColor; 41 }; 42 skia_private::TArray<TimerData> fTimers; 43 double fTotalTimes[kMeasurementCount]; 44 int fCurrentMeasurement; 45 double fLastTotalBegin; 46 double fCumulativeMeasurementTime; 47 int fCumulativeMeasurementCount; 48 float fDisplayScale; 49 }; 50 51 #endif 52