1 /* 2 * Copyright 2016 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/gm.h" 9 #include "include/core/SkBlurTypes.h" 10 #include "include/core/SkCanvas.h" 11 #include "include/core/SkColor.h" 12 #include "include/core/SkMaskFilter.h" 13 #include "include/core/SkPaint.h" 14 #include "include/core/SkPathBuilder.h" 15 #include "include/core/SkRect.h" 16 #include "include/core/SkRefCnt.h" 17 #include "include/core/SkScalar.h" 18 #include "include/core/SkSize.h" 19 #include "include/core/SkString.h" 20 #include "include/utils/SkRandom.h" 21 #include "src/core/SkBlurMask.h" 22 #include "tools/timer/TimeUtils.h" 23 24 /** 25 * In GM mode this draws an array of circles with different radii and different blur radii. Below 26 * each circle an almost-circle path is drawn with the same blur filter for comparison. 27 * 28 * In Sample mode this draws a single circle and almost-circle with animating radius and blur 29 * radius. 30 * 31 * Bench mode draws the same as GM mode but without the comparison almost-circle paths. It also 32 * slightly perturbs the blur and circle radii to stress caching of blurred profiles in GPU mode. 33 */ 34 class BlurCircles2GM : public skiagm::GM { 35 public: BlurCircles2GM()36 BlurCircles2GM() { 37 fAnimRadius = TimeUtils::PingPong( 38 0, kRadiusPingPoingPeriod, kRadiusPingPoingShift, kMinRadius, kMaxRadius); 39 fAnimBlurRadius = TimeUtils::PingPong(0, 40 kBlurRadiusPingPoingPeriod, 41 kBlurRadiusPingPoingShift, 42 kMinBlurRadius, 43 kMaxBlurRadius); 44 } 45 46 protected: runAsBench() const47 bool runAsBench() const override { return true; } 48 onShortName()49 SkString onShortName() override { return SkString("blurcircles2"); } 50 onISize()51 SkISize onISize() override { 52 return SkISize::Make(730, 1350); 53 } 54 onDraw(SkCanvas * canvas)55 void onDraw(SkCanvas* canvas) override { 56 constexpr SkScalar kMaxR = kMaxRadius + kMaxBlurRadius; 57 58 auto almostCircleMaker = [] (SkScalar radius) { 59 return SkPathBuilder().addArc(SkRect::MakeXYWH(-radius, -radius, 2 * radius, 2 * radius), 0, 355) 60 .setIsVolatile(true) 61 .close() 62 .detach(); 63 }; 64 65 auto blurMaker = [] (SkScalar radius) ->sk_sp<SkMaskFilter> { 66 return SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, 67 SkBlurMask::ConvertRadiusToSigma(radius)); 68 }; 69 70 SkPaint paint; 71 paint.setColor(SK_ColorBLACK); 72 73 if (this->getMode() == kSample_Mode) { 74 paint.setMaskFilter(blurMaker(fAnimBlurRadius)); 75 SkISize size = canvas->getBaseLayerSize(); 76 SkPath almostCircle = almostCircleMaker(fAnimRadius); 77 canvas->save(); 78 canvas->translate(size.fWidth / 2.f, size.fHeight / 4.f); 79 canvas->drawCircle(0, 0, fAnimRadius, paint); 80 canvas->translate(0, 2 * kMaxR); 81 canvas->drawPath(almostCircle, paint); 82 canvas->restore(); 83 } else { 84 bool benchMode = this->getMode() == kBench_Mode; 85 canvas->save(); 86 constexpr SkScalar kPad = 5; 87 constexpr SkScalar kRadiusSteps = 5; 88 constexpr SkScalar kBlurRadiusSteps = 5; 89 canvas->translate(kPad + kMinRadius + kMaxBlurRadius, 90 kPad + kMinRadius + kMaxBlurRadius); 91 constexpr SkScalar kDeltaRadius = (kMaxRadius - kMinRadius) / kRadiusSteps; 92 constexpr SkScalar kDeltaBlurRadius = (kMaxBlurRadius - kMinBlurRadius) / 93 kBlurRadiusSteps; 94 SkScalar lineWidth = 0; 95 if (!benchMode) { 96 for (int r = 0; r < kRadiusSteps - 1; ++r) { 97 const SkScalar radius = r * kDeltaRadius + kMinRadius; 98 lineWidth += 2 * (radius + kMaxBlurRadius) + kPad; 99 } 100 } 101 for (int br = 0; br < kBlurRadiusSteps; ++br) { 102 SkScalar blurRadius = br * kDeltaBlurRadius + kMinBlurRadius; 103 if (benchMode) { 104 blurRadius += fRandom.nextSScalar1() * kDeltaBlurRadius; 105 } 106 const SkScalar maxRowR = blurRadius + kMaxRadius; 107 paint.setMaskFilter(blurMaker(blurRadius)); 108 canvas->save(); 109 for (int r = 0; r < kRadiusSteps; ++r) { 110 SkScalar radius = r * kDeltaRadius + kMinRadius; 111 if (benchMode) { 112 radius += fRandom.nextSScalar1() * kDeltaRadius; 113 } 114 SkPath almostCircle; 115 if (!benchMode) { 116 almostCircle = almostCircleMaker(radius); 117 } 118 canvas->save(); 119 canvas->drawCircle(0, 0, radius, paint); 120 canvas->translate(0, 2 * maxRowR + kPad); 121 if (!benchMode) { 122 canvas->drawPath(almostCircle, paint); 123 } 124 canvas->restore(); 125 const SkScalar maxColR = radius + kMaxBlurRadius; 126 canvas->translate(maxColR * 2 + kPad, 0); 127 } 128 canvas->restore(); 129 if (!benchMode) { 130 SkPaint blackPaint; 131 blackPaint.setColor(SK_ColorBLACK); 132 const SkScalar lineY = 3 * maxRowR + 1.5f * kPad; 133 if (br != kBlurRadiusSteps - 1) { 134 canvas->drawLine(0, lineY, lineWidth, lineY, blackPaint); 135 } 136 } 137 canvas->translate(0, maxRowR * 4 + 2 * kPad); 138 } 139 canvas->restore(); 140 } 141 } 142 onAnimate(double nanos)143 bool onAnimate(double nanos) override { 144 fAnimRadius = TimeUtils::PingPong(1e-9 * nanos, kRadiusPingPoingPeriod, kRadiusPingPoingShift, kMinRadius, 145 kMaxRadius); 146 fAnimBlurRadius = TimeUtils::PingPong(1e-9 * nanos, kBlurRadiusPingPoingPeriod, kBlurRadiusPingPoingShift, 147 kMinBlurRadius, kMaxBlurRadius); 148 return true; 149 } 150 151 private: 152 inline static constexpr SkScalar kMinRadius = 15; 153 inline static constexpr SkScalar kMaxRadius = 45; 154 inline static constexpr SkScalar kRadiusPingPoingPeriod = 8; 155 inline static constexpr SkScalar kRadiusPingPoingShift = 3; 156 157 inline static constexpr SkScalar kMinBlurRadius = 5; 158 inline static constexpr SkScalar kMaxBlurRadius = 45; 159 inline static constexpr SkScalar kBlurRadiusPingPoingPeriod = 3; 160 inline static constexpr SkScalar kBlurRadiusPingPoingShift = 1.5; 161 162 SkScalar fAnimRadius; 163 SkScalar fAnimBlurRadius; 164 165 SkRandom fRandom; 166 167 using INHERITED = skiagm::GM; 168 }; 169 170 DEF_GM(return new BlurCircles2GM();) 171