move visual bench interactive module to timing state machine

tools/VisualBench/VisualInteractiveModule.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  */
 
 #ifndef VisualInteractiveModule_DEFINED
 #define VisualInteractiveModule_DEFINED
 
 #include "VisualModule.h"
 
 #include "ResultsWriter.h"
 #include "SkPicture.h"
 #include "Timer.h"
+#include "TimingStateMachine.h"
 #include "VisualBench.h"
 #include "VisualBenchmarkStream.h"
 
 class SkCanvas;
 
 /*
  * This module for VisualBench is designed to display stats data dynamically
  */
 class VisualInteractiveModule : public VisualModule {
 public:
     // TODO get rid of backpointer
     VisualInteractiveModule(VisualBench* owner);
 
     void draw(SkCanvas* canvas) override;
     bool onHandleChar(SkUnichar unichar) override;
 
 private:
-    /*
-     * The heart of visual bench is an event driven timing loop.
-     * kPreWarmLoopsPerCanvasPreDraw_State:  Before we begin timing, Benchmarks have a hook to
-     *                                       access the canvas.  Then we prewarm before the autotune
-     *                                       loops step.
-     * kPreWarmLoops_State:                  We prewarm the gpu before auto tuning to enter a steady
-     *                                       work state
-     * kTuneLoops_State:                     Then we tune the loops of the benchmark to ensure we
-     *                                       are doing a measurable amount of work
-     * kPreTiming_State:                     Because reset the context after tuning loops to ensure
-     *                                       coherent state, we need to restart before timing
-     * kTiming_State:                        Finally we time the benchmark.  In this case we
-     *                                       continue running and displaying benchmark data
-     *                                       until we quit or switch to another benchmark
-     * kAdvance_State:                       Advance to the next benchmark in the stream
-     */
-    enum State {
-        kPreWarmLoopsPerCanvasPreDraw_State,
-        kPreWarmLoops_State,
-        kTuneLoops_State,
-        kPreTiming_State,
-        kTiming_State,
-        kAdvance_State,
-    };
     void setTitle();
     bool setupBackend();
     void setupRenderTarget();
     void drawStats(SkCanvas*);
     bool advanceRecordIfNecessary(SkCanvas*);
     inline void renderFrame(SkCanvas*);
-    inline void nextState(State);
-    void perCanvasPreDraw(SkCanvas*, State);
-    void preWarm(State nextState);
-    void scaleLoops(double elapsedMs);
-    inline void tuneLoops(SkCanvas*);
-    inline void timing(SkCanvas*);
-    inline double elapsed();
-    void resetTimingState();
-    void postDraw(SkCanvas*);
-    void recordMeasurement();
 
     static const int kMeasurementCount = 64;  // should be power of 2 for fast mod
     double fMeasurements[kMeasurementCount];
     int fCurrentMeasurement;
 
-    int fCurrentFrame;
-    int fLoops;
-    WallTimer fTimer;
-    State fState;
     SkAutoTDelete<VisualBenchmarkStream> fBenchmarkStream;
     SkAutoTUnref<Benchmark> fBenchmark;
+    TimingStateMachine fTSM;
+    bool fAdvance;
 
     // support framework
     SkAutoTUnref<VisualBench> fOwner;
 
     typedef VisualModule INHERITED;
 };
 
 #endif