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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         : fName("blurcircles") {
     19     }
     20 
     21 protected:
     22     virtual uint32_t onGetFlags() const SK_OVERRIDE {
     23         return kSkipTiled_Flag;
     24     }
     25 
     26     virtual SkString onShortName() SK_OVERRIDE {
     27         return fName;
     28     }
     29 
     30     virtual SkISize onISize() SK_OVERRIDE {
     31         return SkISize::Make(950, 950);
     32     }
     33 
     34     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
     35         canvas->scale(1.5f, 1.5f);
     36         canvas->translate(50,50);
     37 
     38         const float blurRadii[] = { 1,5,10,20 };
     39         const int circleRadii[] = { 5,10,25,50 };
     40         for (size_t i = 0; i < SK_ARRAY_COUNT(blurRadii); ++i) {
     41             SkAutoCanvasRestore autoRestore(canvas, true);
     42             canvas->translate(0, SkIntToScalar(150*i));
     43             for (size_t j = 0; j < SK_ARRAY_COUNT(circleRadii); ++j) {
     44                 SkMaskFilter* filter = SkBlurMaskFilter::Create(
     45                     kNormal_SkBlurStyle,
     46                     SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(blurRadii[i])),
     47                     SkBlurMaskFilter::kHighQuality_BlurFlag);
     48                 SkPaint paint;
     49                 paint.setColor(SK_ColorBLACK);
     50                 paint.setMaskFilter(filter)->unref();
     51 
     52                 canvas->drawCircle(SkIntToScalar(50),SkIntToScalar(50),SkIntToScalar(circleRadii[j]),paint);
     53                 canvas->translate(SkIntToScalar(150), 0);
     54             }
     55         }
     56     }
     57 private:
     58     const SkString  fName;
     59 
     60     typedef         skiagm::GM INHERITED;
     61 };
     62 
     63 DEF_GM(return new BlurCirclesGM();)
     64