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      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 #include "Benchmark.h"
      9 #include "SkCanvas.h"
     10 #include "SkPath.h"
     11 #include "SkPathOps.h"
     12 
     13 class ClipStrategyBench : public Benchmark {
     14 public:
     15     enum class Mode {
     16         kClipPath,
     17         kMask,
     18     };
     19 
     20     ClipStrategyBench(Mode mode, size_t count)
     21         : fMode(mode)
     22         , fCount(count)
     23         , fName("clip_strategy_"){
     24 
     25         if (fMode == Mode::kClipPath) {
     26             fName.append("path_");
     27             this->forEachClipCircle([&](float x, float y, float r) {
     28                 fClipPath.addCircle(x, y, r);
     29             });
     30         } else {
     31             fName.append("mask_");
     32         }
     33         fName.appendf("%zu", count);
     34     }
     35 
     36     ~ClipStrategyBench() override = default;
     37 
     38 protected:
     39     const char* onGetName() override {
     40         return fName.c_str();
     41     }
     42 
     43     void onDraw(int loops, SkCanvas* canvas) override {
     44         SkPaint p, srcIn;
     45         p.setAntiAlias(true);
     46         srcIn.setBlendMode(SkBlendMode::kSrcIn);
     47 
     48         for (int i = 0; i < loops; ++i) {
     49             SkAutoCanvasRestore acr(canvas, false);
     50 
     51             if (fMode == Mode::kClipPath) {
     52                 canvas->save();
     53                 canvas->clipPath(fClipPath, true);
     54             } else {
     55                 canvas->saveLayer(nullptr, nullptr);
     56                 this->forEachClipCircle([&](float x, float y, float r) {
     57                     canvas->drawCircle(x, y, r, p);
     58                 });
     59                 canvas->saveLayer(nullptr, &srcIn);
     60             }
     61             canvas->drawColor(SK_ColorGREEN);
     62         }
     63     }
     64 
     65 private:
     66     template <typename Func>
     67     void forEachClipCircle(Func&& func) {
     68         auto q = static_cast<float>(this->getSize().x()) / (fCount + 1);
     69         for (size_t i = 1; i <= fCount; ++i) {
     70             auto x = q * i;
     71             func(x, x, q / 2);
     72         }
     73     }
     74 
     75     Mode     fMode;
     76     size_t   fCount;
     77     SkString fName;
     78     SkPath   fClipPath;
     79 
     80     typedef Benchmark INHERITED;
     81 };
     82 
     83 DEF_BENCH( return new ClipStrategyBench(ClipStrategyBench::Mode::kClipPath, 1  );)
     84 DEF_BENCH( return new ClipStrategyBench(ClipStrategyBench::Mode::kClipPath, 5  );)
     85 DEF_BENCH( return new ClipStrategyBench(ClipStrategyBench::Mode::kClipPath, 10 );)
     86 DEF_BENCH( return new ClipStrategyBench(ClipStrategyBench::Mode::kClipPath, 100);)
     87 
     88 DEF_BENCH( return new ClipStrategyBench(ClipStrategyBench::Mode::kMask, 1  );)
     89 DEF_BENCH( return new ClipStrategyBench(ClipStrategyBench::Mode::kMask, 5  );)
     90 DEF_BENCH( return new ClipStrategyBench(ClipStrategyBench::Mode::kMask, 10 );)
     91 DEF_BENCH( return new ClipStrategyBench(ClipStrategyBench::Mode::kMask, 100);)
     92