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      1 /*
      2  * Copyright 2014 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 "Resources.h"
     10 #include "SkBlurImageFilter.h"
     11 #include "SkCanvas.h"
     12 #include "SkDisplacementMapEffect.h"
     13 #include "SkImage.h"
     14 #include "SkMergeImageFilter.h"
     15 #include "SkOffsetImageFilter.h"
     16 #include "SkXfermodeImageFilter.h"
     17 
     18 // Exercise a blur filter connected to 5 inputs of the same merge filter.
     19 // This bench shows an improvement in performance once cacheing of re-used
     20 // nodes is implemented, since the DAG is no longer flattened to a tree.
     21 class ImageFilterDAGBench : public Benchmark {
     22 public:
     23     ImageFilterDAGBench() {}
     24 
     25 protected:
     26     const char* onGetName() override {
     27         return "image_filter_dag";
     28     }
     29 
     30     void onDraw(int loops, SkCanvas* canvas) override {
     31         const SkRect rect = SkRect::Make(SkIRect::MakeWH(400, 400));
     32 
     33         for (int j = 0; j < loops; j++) {
     34             sk_sp<SkImageFilter> blur(SkBlurImageFilter::Make(20.0f, 20.0f, nullptr));
     35             sk_sp<SkImageFilter> inputs[kNumInputs];
     36             for (int i = 0; i < kNumInputs; ++i) {
     37                 inputs[i] = blur;
     38             }
     39             SkPaint paint;
     40             paint.setImageFilter(SkMergeImageFilter::Make(inputs, kNumInputs));
     41             canvas->drawRect(rect, paint);
     42         }
     43     }
     44 
     45 private:
     46     static const int kNumInputs = 5;
     47 
     48     typedef Benchmark INHERITED;
     49 };
     50 
     51 class ImageMakeWithFilterDAGBench : public Benchmark {
     52 public:
     53     ImageMakeWithFilterDAGBench() {}
     54 
     55 protected:
     56     const char* onGetName() override {
     57         return "image_make_with_filter_dag";
     58     }
     59 
     60     void onDelayedSetup() override {
     61         fImage = GetResourceAsImage("images/mandrill_512.png");
     62     }
     63 
     64     void onDraw(int loops, SkCanvas* canvas) override {
     65         SkIRect subset = SkIRect::MakeSize(fImage->dimensions());
     66         SkIPoint offset = SkIPoint::Make(0, 0);
     67         SkIRect discardSubset;
     68         sk_sp<SkImage> image = fImage;
     69 
     70         for (int j = 0; j < loops; j++) {
     71             sk_sp<SkImageFilter> blur(SkBlurImageFilter::Make(20.0f, 20.0f, nullptr));
     72             sk_sp<SkImageFilter> inputs[kNumInputs];
     73             for (int i = 0; i < kNumInputs; ++i) {
     74                 inputs[i] = blur;
     75             }
     76             sk_sp<SkImageFilter> mergeFilter = SkMergeImageFilter::Make(inputs, kNumInputs);
     77             image = image->makeWithFilter(mergeFilter.get(), subset, subset, &discardSubset,
     78                                           &offset);
     79             SkASSERT(image && image->dimensions() == fImage->dimensions());
     80         }
     81     }
     82 
     83 private:
     84     static const int kNumInputs = 5;
     85     sk_sp<SkImage> fImage;
     86 
     87     typedef Benchmark INHERITED;
     88 };
     89 
     90 // Exercise a blur filter connected to both inputs of an SkDisplacementMapEffect.
     91 
     92 class ImageFilterDisplacedBlur : public Benchmark {
     93 public:
     94     ImageFilterDisplacedBlur() {}
     95 
     96 protected:
     97     const char* onGetName() override {
     98         return "image_filter_displaced_blur";
     99     }
    100 
    101     void onDraw(int loops, SkCanvas* canvas) override {
    102         for (int j = 0; j < loops; j++) {
    103             sk_sp<SkImageFilter> blur(SkBlurImageFilter::Make(4.0f, 4.0f, nullptr));
    104             auto xSelector = SkDisplacementMapEffect::kR_ChannelSelectorType;
    105             auto ySelector = SkDisplacementMapEffect::kB_ChannelSelectorType;
    106             SkScalar scale = 2;
    107 
    108             SkPaint paint;
    109             paint.setImageFilter(SkDisplacementMapEffect::Make(xSelector, ySelector, scale,
    110                                                                blur, blur));
    111 
    112             SkRect rect = SkRect::Make(SkIRect::MakeWH(400, 400));
    113             canvas->drawRect(rect, paint);
    114         }
    115     }
    116 
    117 private:
    118     typedef Benchmark INHERITED;
    119 };
    120 
    121 // Exercise an Xfermode kSrcIn filter compositing two inputs which have a small intersection.
    122 class ImageFilterXfermodeIn : public Benchmark {
    123 public:
    124     ImageFilterXfermodeIn() {}
    125 
    126 protected:
    127     const char* onGetName() override { return "image_filter_xfermode_in"; }
    128 
    129     void onDraw(int loops, SkCanvas* canvas) override {
    130         for (int j = 0; j < loops; j++) {
    131             auto blur = SkBlurImageFilter::Make(20.0f, 20.0f, nullptr);
    132             auto offset1 = SkOffsetImageFilter::Make(100.0f, 100.0f, blur);
    133             auto offset2 = SkOffsetImageFilter::Make(-100.0f, -100.0f, blur);
    134             auto xfermode =
    135                     SkXfermodeImageFilter::Make(SkBlendMode::kSrcIn, offset1, offset2, nullptr);
    136 
    137             SkPaint paint;
    138             paint.setImageFilter(xfermode);
    139             canvas->drawRect(SkRect::MakeWH(200.0f, 200.0f), paint);
    140         }
    141     }
    142 
    143 private:
    144     typedef Benchmark INHERITED;
    145 };
    146 
    147 DEF_BENCH(return new ImageFilterDAGBench;)
    148 DEF_BENCH(return new ImageMakeWithFilterDAGBench;)
    149 DEF_BENCH(return new ImageFilterDisplacedBlur;)
    150 DEF_BENCH(return new ImageFilterXfermodeIn;)
    151