2 * Copyright 2016 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
9 #include "SkAnimTimer.h"
10 #include "SkBlurMask.h"
11 #include "SkBlurMaskFilter.h"
19 * In GM mode this draws an array of circles with different radii and different blur radii. Below
20 * each circle an almost-circle path is drawn with the same blur filter for comparison.
22 * In Sample mode this draws a single circle and almost-circle with animating radius and blur
25 * Bench mode draws the same as GM mode but without the comparison almost-circle paths. It also
26 * slightly perturbs the blur and circle radii to stress caching of blurred profiles in GPU mode.
28 class BlurCircles2GM : public skiagm::GM {
31 fAnimRadius = SkAnimTimer::PingPong(0, kRadiusPingPoingPeriod, kRadiusPingPoingShift,
32 kMinRadius, kMaxRadius);
33 fAnimBlurRadius = SkAnimTimer::PingPong(0, kBlurRadiusPingPoingPeriod,
34 kBlurRadiusPingPoingShift, kMinBlurRadius,
39 bool runAsBench() const override { return true; }
41 SkString onShortName() override { return SkString("blurcircles2"); }
43 SkISize onISize() override {
44 return SkISize::Make(730, 1350);
47 void onDraw(SkCanvas* canvas) override {
48 constexpr SkScalar kMaxR = kMaxRadius + kMaxBlurRadius;
50 auto almostCircleMaker = [] (SkScalar radius, SkPath* dst) {
52 dst->addArc(SkRect::MakeXYWH(-radius, -radius, 2 * radius, 2 * radius), 0, 355);
53 dst->setIsVolatile(true);
57 auto blurMaker = [] (SkScalar radius) ->sk_sp<SkMaskFilter> {
58 return SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
59 SkBlurMask::ConvertRadiusToSigma(radius),
60 SkBlurMaskFilter::kHighQuality_BlurFlag);
64 paint.setColor(SK_ColorBLACK);
66 if (this->getMode() == kSample_Mode) {
67 paint.setMaskFilter(blurMaker(fAnimBlurRadius));
68 SkISize size = canvas->getBaseLayerSize();
70 almostCircleMaker(fAnimRadius, &almostCircle);
72 canvas->translate(size.fWidth / 2.f, size.fHeight / 4.f);
73 canvas->drawCircle(0, 0, fAnimRadius, paint);
74 canvas->translate(0, 2 * kMaxR);
75 canvas->drawPath(almostCircle, paint);
78 bool benchMode = this->getMode() == kBench_Mode;
80 constexpr SkScalar kPad = 5;
81 constexpr SkScalar kRadiusSteps = 5;
82 constexpr SkScalar kBlurRadiusSteps = 5;
83 canvas->translate(kPad + kMinRadius + kMaxBlurRadius,
84 kPad + kMinRadius + kMaxBlurRadius);
85 constexpr SkScalar kDeltaRadius = (kMaxRadius - kMinRadius) / kRadiusSteps;
86 constexpr SkScalar kDeltaBlurRadius = (kMaxBlurRadius - kMinBlurRadius) /
88 SkScalar lineWidth = 0;
90 for (int r = 0; r < kRadiusSteps - 1; ++r) {
91 const SkScalar radius = r * kDeltaRadius + kMinRadius;
92 lineWidth += 2 * (radius + kMaxBlurRadius) + kPad;
95 for (int br = 0; br < kBlurRadiusSteps; ++br) {
96 SkScalar blurRadius = br * kDeltaBlurRadius + kMinBlurRadius;
98 blurRadius += fRandom.nextSScalar1() * kDeltaBlurRadius;
100 const SkScalar maxRowR = blurRadius + kMaxRadius;
101 paint.setMaskFilter(blurMaker(blurRadius));
103 for (int r = 0; r < kRadiusSteps; ++r) {
104 SkScalar radius = r * kDeltaRadius + kMinRadius;
106 radius += fRandom.nextSScalar1() * kDeltaRadius;
110 almostCircleMaker(radius, &almostCircle);
113 canvas->drawCircle(0, 0, radius, paint);
114 canvas->translate(0, 2 * maxRowR + kPad);
116 canvas->drawPath(almostCircle, paint);
119 const SkScalar maxColR = radius + kMaxBlurRadius;
120 canvas->translate(maxColR * 2 + kPad, 0);
125 blackPaint.setColor(SK_ColorBLACK);
126 const SkScalar lineY = 3 * maxRowR + 1.5f * kPad;
127 if (br != kBlurRadiusSteps - 1) {
128 canvas->drawLine(0, lineY, lineWidth, lineY, blackPaint);
131 canvas->translate(0, maxRowR * 4 + 2 * kPad);
137 bool onAnimate(const SkAnimTimer& timer) override {
138 fAnimRadius = timer.pingPong(kRadiusPingPoingPeriod, kRadiusPingPoingShift, kMinRadius,
140 fAnimBlurRadius = timer.pingPong(kBlurRadiusPingPoingPeriod, kBlurRadiusPingPoingShift,
141 kMinBlurRadius, kMaxBlurRadius);
146 static constexpr SkScalar kMinRadius = 15;
147 static constexpr SkScalar kMaxRadius = 45;
148 static constexpr SkScalar kRadiusPingPoingPeriod = 8;
149 static constexpr SkScalar kRadiusPingPoingShift = 3;
151 static constexpr SkScalar kMinBlurRadius = 5;
152 static constexpr SkScalar kMaxBlurRadius = 45;
153 static constexpr SkScalar kBlurRadiusPingPoingPeriod = 3;
154 static constexpr SkScalar kBlurRadiusPingPoingShift = 1.5;
156 SkScalar fAnimRadius;
157 SkScalar fAnimBlurRadius;
161 typedef skiagm::GM INHERITED;
164 DEF_GM(return new BlurCircles2GM();)