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 "gm.h"
9#include "SkBlurMask.h"
10#include "SkBlurMaskFilter.h"
11#include "SkCanvas.h"
12#include "SkPaint.h"
13#include "SkString.h"
14
15class BlurCirclesGM : public skiagm::GM {
16public:
17    BlurCirclesGM() { }
18
19protected:
20    bool runAsBench() const override { return true; }
21
22    SkString onShortName() override {
23        return SkString("blurcircles");
24    }
25
26    SkISize onISize() override {
27        return SkISize::Make(950, 950);
28    }
29
30    void onOnceBeforeDraw() override {
31        const float blurRadii[kNumBlurs] = { 1,5,10,20 };
32
33        for (int i = 0; i < kNumBlurs; ++i) {
34            fBlurFilters[i] = SkBlurMaskFilter::Make(
35                                    kNormal_SkBlurStyle,
36                                    SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(blurRadii[i])),
37                                    SkBlurMaskFilter::kHighQuality_BlurFlag);
38        }
39    }
40
41    void onDraw(SkCanvas* canvas) override {
42        canvas->scale(1.5f, 1.5f);
43        canvas->translate(50,50);
44
45        const int circleRadii[] = { 5,10,25,50 };
46
47        for (size_t i = 0; i < kNumBlurs; ++i) {
48            SkAutoCanvasRestore autoRestore(canvas, true);
49            canvas->translate(0, SkIntToScalar(150*i));
50            for (size_t j = 0; j < SK_ARRAY_COUNT(circleRadii); ++j) {
51                SkPaint paint;
52                paint.setColor(SK_ColorBLACK);
53                paint.setMaskFilter(fBlurFilters[i]);
54
55                canvas->drawCircle(SkIntToScalar(50),SkIntToScalar(50),SkIntToScalar(circleRadii[j]),paint);
56                canvas->translate(SkIntToScalar(150), 0);
57            }
58        }
59    }
60private:
61    static constexpr int kNumBlurs = 4;
62
63    sk_sp<SkMaskFilter> fBlurFilters[kNumBlurs];
64
65    typedef         skiagm::GM INHERITED;
66};
67
68DEF_GM(return new BlurCirclesGM();)
69