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 "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"
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.
28 * In Sample mode this draws a single circle and almost-circle with animating radius and blur
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.
34 class BlurCircles2GM : public skiagm::GM {
37 fAnimRadius = TimeUtils::PingPong(
38 0, kRadiusPingPoingPeriod, kRadiusPingPoingShift, kMinRadius, kMaxRadius);
39 fAnimBlurRadius = TimeUtils::PingPong(0,
40 kBlurRadiusPingPoingPeriod,
41 kBlurRadiusPingPoingShift,
47 bool runAsBench() const override { return true; }
49 SkString onShortName() override { return SkString("blurcircles2"); }
51 SkISize onISize() override {
52 return SkISize::Make(730, 1350);
55 void onDraw(SkCanvas* canvas) override {
56 constexpr SkScalar kMaxR = kMaxRadius + kMaxBlurRadius;
58 auto almostCircleMaker = [] (SkScalar radius) {
59 return SkPathBuilder().addArc(SkRect::MakeXYWH(-radius, -radius, 2 * radius, 2 * radius), 0, 355)
65 auto blurMaker = [] (SkScalar radius) ->sk_sp<SkMaskFilter> {
66 return SkMaskFilter::MakeBlur(kNormal_SkBlurStyle,
67 SkBlurMask::ConvertRadiusToSigma(radius));
71 paint.setColor(SK_ColorBLACK);
73 if (this->getMode() == kSample_Mode) {
74 paint.setMaskFilter(blurMaker(fAnimBlurRadius));
75 SkISize size = canvas->getBaseLayerSize();
76 SkPath almostCircle = almostCircleMaker(fAnimRadius);
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);
84 bool benchMode = this->getMode() == kBench_Mode;
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) /
94 SkScalar lineWidth = 0;
96 for (int r = 0; r < kRadiusSteps - 1; ++r) {
97 const SkScalar radius = r * kDeltaRadius + kMinRadius;
98 lineWidth += 2 * (radius + kMaxBlurRadius) + kPad;
101 for (int br = 0; br < kBlurRadiusSteps; ++br) {
102 SkScalar blurRadius = br * kDeltaBlurRadius + kMinBlurRadius;
104 blurRadius += fRandom.nextSScalar1() * kDeltaBlurRadius;
106 const SkScalar maxRowR = blurRadius + kMaxRadius;
107 paint.setMaskFilter(blurMaker(blurRadius));
109 for (int r = 0; r < kRadiusSteps; ++r) {
110 SkScalar radius = r * kDeltaRadius + kMinRadius;
112 radius += fRandom.nextSScalar1() * kDeltaRadius;
116 almostCircle = almostCircleMaker(radius);
119 canvas->drawCircle(0, 0, radius, paint);
120 canvas->translate(0, 2 * maxRowR + kPad);
122 canvas->drawPath(almostCircle, paint);
125 const SkScalar maxColR = radius + kMaxBlurRadius;
126 canvas->translate(maxColR * 2 + kPad, 0);
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);
137 canvas->translate(0, maxRowR * 4 + 2 * kPad);
143 bool onAnimate(double nanos) override {
144 fAnimRadius = TimeUtils::PingPong(1e-9 * nanos, kRadiusPingPoingPeriod, kRadiusPingPoingShift, kMinRadius,
146 fAnimBlurRadius = TimeUtils::PingPong(1e-9 * nanos, kBlurRadiusPingPoingPeriod, kBlurRadiusPingPoingShift,
147 kMinBlurRadius, kMaxBlurRadius);
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;
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;
162 SkScalar fAnimRadius;
163 SkScalar fAnimBlurRadius;
167 using INHERITED = skiagm::GM;
170 DEF_GM(return new BlurCircles2GM();)