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/*
* 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 VisualBench_DEFINED
#define VisualBench_DEFINED
#include "SkWindow.h"
#include "SkPicture.h"
#include "SkString.h"
#include "SkSurface.h"
#include "Timer.h"
#include "VisualBenchmarkStream.h"
#include "gl/SkGLContext.h"
class GrContext;
struct GrGLInterface;
class GrRenderTarget;
class SkCanvas;
/*
* A Visual benchmarking tool for gpu benchmarking
*/
class VisualBench : public SkOSWindow {
public:
VisualBench(void* hwnd, int argc, char** argv);
~VisualBench() override;
protected:
SkSurface* createSurface() override;
void draw(SkCanvas* canvas) override;
void onSizeChange() 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
* kPreWarmTimingPerCanvasPreDraw_State: Because reset the context after tuning loops to ensure
* coherent state, we need to give the benchmark
* another hook
* kPreWarmTiming_State: We prewarm the gpu again to enter a steady state
* kTiming_State: Finally we time the benchmark. When finished timing
* if we have enough samples then we'll start the next
* benchmark in the kPreWarmLoopsPerCanvasPreDraw_State.
* otherwise, we enter the
* kPreWarmTimingPerCanvasPreDraw_State for another sample
* In either case we reset the context.
*/
enum State {
kPreWarmLoopsPerCanvasPreDraw_State,
kPreWarmLoops_State,
kTuneLoops_State,
kPreWarmTimingPerCanvasPreDraw_State,
kPreWarmTiming_State,
kTiming_State,
};
void setTitle();
bool setupBackend();
void resetContext();
void setupRenderTarget();
bool onHandleChar(SkUnichar unichar) override;
void printStats();
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();
inline void timing(SkCanvas*);
inline double elapsed();
void resetTimingState();
void postDraw(SkCanvas*);
void recordMeasurement();
struct Record {
SkTArray<double> fMeasurements;
};
int fCurrentSample;
int fCurrentFrame;
int fFlushes;
int fLoops;
SkTArray<Record> fRecords;
WallTimer fTimer;
State fState;
SkAutoTDelete<VisualBenchmarkStream> fBenchmarkStream;
SkAutoTUnref<Benchmark> fBenchmark;
// support framework
SkAutoTUnref<SkSurface> fSurface;
SkAutoTUnref<GrContext> fContext;
SkAutoTUnref<GrRenderTarget> fRenderTarget;
AttachmentInfo fAttachmentInfo;
SkAutoTUnref<const GrGLInterface> fInterface;
typedef SkOSWindow INHERITED;
};
#endif
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