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.
21class ImageFilterDAGBench : public Benchmark {
22public:
23    ImageFilterDAGBench() {}
24
25protected:
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
45private:
46    static const int kNumInputs = 5;
47
48    typedef Benchmark INHERITED;
49};
50
51class ImageMakeWithFilterDAGBench : public Benchmark {
52public:
53    ImageMakeWithFilterDAGBench() {}
54
55protected:
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
83private:
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
92class ImageFilterDisplacedBlur : public Benchmark {
93public:
94    ImageFilterDisplacedBlur() {}
95
96protected:
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
117private:
118    typedef Benchmark INHERITED;
119};
120
121// Exercise an Xfermode kSrcIn filter compositing two inputs which have a small intersection.
122class ImageFilterXfermodeIn : public Benchmark {
123public:
124    ImageFilterXfermodeIn() {}
125
126protected:
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
143private:
144    typedef Benchmark INHERITED;
145};
146
147DEF_BENCH(return new ImageFilterDAGBench;)
148DEF_BENCH(return new ImageMakeWithFilterDAGBench;)
149DEF_BENCH(return new ImageFilterDisplacedBlur;)
150DEF_BENCH(return new ImageFilterXfermodeIn;)
151