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 
15 class BlurCirclesGM : public skiagm::GM {
16 public:
BlurCirclesGM()17     BlurCirclesGM()
18         : fName("blurcircles") {
19     }
20 
21 protected:
22 
onShortName()23     SkString onShortName() override {
24         return fName;
25     }
26 
onISize()27     SkISize onISize() override {
28         return SkISize::Make(950, 950);
29     }
30 
onDraw(SkCanvas * canvas)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     }
54 private:
55     const SkString  fName;
56 
57     typedef         skiagm::GM INHERITED;
58 };
59 
60 DEF_GM(return new BlurCirclesGM();)
61