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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 "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:
     17     BlurCirclesGM() { }
     18 
     19 protected:
     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].reset(SkBlurMaskFilter::Create(
     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     }
     60 private:
     61     static const int kNumBlurs = 4;
     62 
     63     SkAutoTUnref<SkMaskFilter> fBlurFilters[kNumBlurs];
     64 
     65     typedef         skiagm::GM INHERITED;
     66 };
     67 
     68 DEF_GM(return new BlurCirclesGM();)
     69