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        : fName("blurcircles") {
19    }
20
21protected:
22
23    SkString onShortName() override {
24        return fName;
25    }
26
27    SkISize onISize() override {
28        return SkISize::Make(950, 950);
29    }
30
31    void onDraw(SkCanvas* canvas) override {
32        canvas->scale(1.5f, 1.5f);
33        canvas->translate(50,50);
34
35        const float blurRadii[] = { 1,5,10,20 };
36        const int circleRadii[] = { 5,10,25,50 };
37        for (size_t i = 0; i < SK_ARRAY_COUNT(blurRadii); ++i) {
38            SkAutoCanvasRestore autoRestore(canvas, true);
39            canvas->translate(0, SkIntToScalar(150*i));
40            for (size_t j = 0; j < SK_ARRAY_COUNT(circleRadii); ++j) {
41                SkMaskFilter* filter = SkBlurMaskFilter::Create(
42                    kNormal_SkBlurStyle,
43                    SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(blurRadii[i])),
44                    SkBlurMaskFilter::kHighQuality_BlurFlag);
45                SkPaint paint;
46                paint.setColor(SK_ColorBLACK);
47                paint.setMaskFilter(filter)->unref();
48
49                canvas->drawCircle(SkIntToScalar(50),SkIntToScalar(50),SkIntToScalar(circleRadii[j]),paint);
50                canvas->translate(SkIntToScalar(150), 0);
51            }
52        }
53    }
54private:
55    const SkString  fName;
56
57    typedef         skiagm::GM INHERITED;
58};
59
60DEF_GM(return new BlurCirclesGM();)
61