gm/blurcircles.cpp

   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
  23     SkString onShortName() SK_OVERRIDE {
  24         return fName;
  25     }
  26
  27     SkISize onISize() SK_OVERRIDE {
  28         return SkISize::Make(950, 950);
  29     }
  30
  31     void onDraw(SkCanvas* canvas) SK_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();)