caryclark | b6474dd | 2016-01-19 08:07:49 -0800 | [diff] [blame] | 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 | |
Mike Klein | cd5104e | 2019-03-20 11:55:08 -0500 | [diff] [blame] | 8 | #include "AnimTimer.h" |
caryclark | b6474dd | 2016-01-19 08:07:49 -0800 | [diff] [blame] | 9 | #include "SkDashPathEffect.h" |
Mike Klein | cd5104e | 2019-03-20 11:55:08 -0500 | [diff] [blame] | 10 | #include "SkPath.h" |
| 11 | #include "gm.h" |
caryclark | b6474dd | 2016-01-19 08:07:49 -0800 | [diff] [blame] | 12 | |
| 13 | int dash1[] = { 1, 1 }; |
| 14 | int dash2[] = { 1, 3 }; |
| 15 | int dash3[] = { 1, 1, 3, 3 }; |
| 16 | int dash4[] = { 1, 3, 2, 4 }; |
| 17 | |
| 18 | struct DashExample { |
| 19 | int* pattern; |
| 20 | int length; |
| 21 | } dashExamples[] = { |
| 22 | { dash1, SK_ARRAY_COUNT(dash1) }, |
| 23 | { dash2, SK_ARRAY_COUNT(dash2) }, |
| 24 | { dash3, SK_ARRAY_COUNT(dash3) }, |
| 25 | { dash4, SK_ARRAY_COUNT(dash4) } |
| 26 | }; |
| 27 | |
robertphillips | 651bb5f | 2016-04-08 13:35:14 -0700 | [diff] [blame] | 28 | |
| 29 | class DashCircleGM : public skiagm::GM { |
| 30 | public: |
| 31 | DashCircleGM() : fRotation(0) { } |
| 32 | |
| 33 | protected: |
| 34 | SkString onShortName() override { return SkString("dashcircle"); } |
| 35 | |
| 36 | SkISize onISize() override { return SkISize::Make(900, 1200); } |
| 37 | |
| 38 | void onDraw(SkCanvas* canvas) override { |
| 39 | SkPaint refPaint; |
| 40 | refPaint.setAntiAlias(true); |
| 41 | refPaint.setColor(0xFFbf3f7f); |
| 42 | refPaint.setStyle(SkPaint::kStroke_Style); |
| 43 | refPaint.setStrokeWidth(1); |
| 44 | const SkScalar radius = 125; |
| 45 | SkRect oval = SkRect::MakeLTRB(-radius - 20, -radius - 20, radius + 20, radius + 20); |
| 46 | SkPath circle; |
| 47 | circle.addCircle(0, 0, radius); |
| 48 | SkScalar circumference = radius * SK_ScalarPI * 2; |
| 49 | int wedges[] = { 6, 12, 36 }; |
| 50 | canvas->translate(radius+20, radius+20); |
| 51 | for (int wedge : wedges) { |
| 52 | SkScalar arcLength = 360.f / wedge; |
| 53 | canvas->save(); |
| 54 | for (const DashExample& dashExample : dashExamples) { |
| 55 | SkPath refPath; |
| 56 | int dashUnits = 0; |
| 57 | for (int index = 0; index < dashExample.length; ++index) { |
| 58 | dashUnits += dashExample.pattern[index]; |
caryclark | b6474dd | 2016-01-19 08:07:49 -0800 | [diff] [blame] | 59 | } |
robertphillips | 651bb5f | 2016-04-08 13:35:14 -0700 | [diff] [blame] | 60 | SkScalar unitLength = arcLength / dashUnits; |
| 61 | SkScalar angle = 0; |
| 62 | for (int index = 0; index < wedge; ++index) { |
| 63 | for (int i2 = 0; i2 < dashExample.length; i2 += 2) { |
| 64 | SkScalar span = dashExample.pattern[i2] * unitLength; |
| 65 | refPath.moveTo(0, 0); |
| 66 | refPath.arcTo(oval, angle, span, false); |
| 67 | refPath.close(); |
| 68 | angle += span + (dashExample.pattern[i2 + 1]) * unitLength; |
| 69 | } |
| 70 | } |
| 71 | canvas->save(); |
| 72 | canvas->rotate(fRotation); |
| 73 | canvas->drawPath(refPath, refPaint); |
| 74 | canvas->restore(); |
| 75 | SkPaint p; |
| 76 | p.setAntiAlias(true); |
| 77 | p.setStyle(SkPaint::kStroke_Style); |
| 78 | p.setStrokeWidth(10); |
| 79 | SkScalar intervals[4]; |
| 80 | int intervalCount = dashExample.length; |
| 81 | SkScalar dashLength = circumference / wedge / dashUnits; |
| 82 | for (int index = 0; index < dashExample.length; ++index) { |
| 83 | intervals[index] = dashExample.pattern[index] * dashLength; |
| 84 | } |
| 85 | p.setPathEffect(SkDashPathEffect::Make(intervals, intervalCount, 0)); |
| 86 | canvas->save(); |
| 87 | canvas->rotate(fRotation); |
| 88 | canvas->drawPath(circle, p); |
| 89 | canvas->restore(); |
| 90 | canvas->translate(0, radius * 2 + 50); |
caryclark | b6474dd | 2016-01-19 08:07:49 -0800 | [diff] [blame] | 91 | } |
robertphillips | 651bb5f | 2016-04-08 13:35:14 -0700 | [diff] [blame] | 92 | canvas->restore(); |
| 93 | canvas->translate(radius * 2 + 50, 0); |
caryclark | b6474dd | 2016-01-19 08:07:49 -0800 | [diff] [blame] | 94 | } |
caryclark | b6474dd | 2016-01-19 08:07:49 -0800 | [diff] [blame] | 95 | } |
robertphillips | 651bb5f | 2016-04-08 13:35:14 -0700 | [diff] [blame] | 96 | |
Mike Klein | cd5104e | 2019-03-20 11:55:08 -0500 | [diff] [blame] | 97 | bool onAnimate(const AnimTimer& timer) override { |
mtklein | dbfd7ab | 2016-09-01 11:24:54 -0700 | [diff] [blame] | 98 | constexpr SkScalar kDesiredDurationSecs = 100.0f; |
robertphillips | 651bb5f | 2016-04-08 13:35:14 -0700 | [diff] [blame] | 99 | |
| 100 | fRotation = timer.scaled(360.0f/kDesiredDurationSecs, 360.0f); |
| 101 | return true; |
| 102 | } |
| 103 | |
| 104 | private: |
| 105 | SkScalar fRotation; |
| 106 | |
| 107 | typedef GM INHERITED; |
| 108 | }; |
| 109 | |
| 110 | DEF_GM(return new DashCircleGM; ) |
Brian Salomon | 62e4f3d | 2018-04-20 13:54:11 -0400 | [diff] [blame] | 111 | |
| 112 | class DashCircle2GM : public skiagm::GM { |
| 113 | public: |
| 114 | DashCircle2GM() {} |
| 115 | |
| 116 | protected: |
| 117 | SkString onShortName() override { return SkString("dashcircle2"); } |
| 118 | |
| 119 | SkISize onISize() override { return SkISize::Make(635, 900); } |
| 120 | |
| 121 | void onDraw(SkCanvas* canvas) override { |
| 122 | // These intervals are defined relative to tau. |
| 123 | static constexpr SkScalar kIntervals[][2]{ |
| 124 | {0.333f, 0.333f}, |
| 125 | {0.015f, 0.015f}, |
| 126 | {0.01f , 0.09f }, |
| 127 | {0.097f, 0.003f}, |
| 128 | {0.02f , 0.04f }, |
| 129 | {0.1f , 0.2f }, |
| 130 | {0.25f , 0.25f }, |
| 131 | {0.6f , 0.7f }, // adds to > 1 |
| 132 | {1.2f , 0.8f }, // on is > 1 |
| 133 | {0.1f , 1.1f }, // off is > 1*/ |
| 134 | }; |
| 135 | |
| 136 | static constexpr int kN = SK_ARRAY_COUNT(kIntervals); |
| 137 | static constexpr SkScalar kRadius = 20.f; |
| 138 | static constexpr SkScalar kStrokeWidth = 15.f; |
| 139 | static constexpr SkScalar kPad = 5.f; |
| 140 | static constexpr SkRect kCircle = {-kRadius, -kRadius, kRadius, kRadius}; |
| 141 | |
| 142 | static constexpr SkScalar kThinRadius = kRadius * 1.5; |
| 143 | static constexpr SkRect kThinCircle = {-kThinRadius, -kThinRadius, |
| 144 | kThinRadius, kThinRadius}; |
| 145 | static constexpr SkScalar kThinStrokeWidth = 0.4f; |
| 146 | |
| 147 | sk_sp<SkPathEffect> deffects[SK_ARRAY_COUNT(kIntervals)]; |
| 148 | sk_sp<SkPathEffect> thinDEffects[SK_ARRAY_COUNT(kIntervals)]; |
| 149 | for (int i = 0; i < kN; ++i) { |
| 150 | static constexpr SkScalar kTau = 2 * SK_ScalarPI; |
| 151 | static constexpr SkScalar kCircumference = kRadius * kTau; |
| 152 | SkScalar scaledIntervals[2] = {kCircumference * kIntervals[i][0], |
| 153 | kCircumference * kIntervals[i][1]}; |
| 154 | deffects[i] = SkDashPathEffect::Make( |
| 155 | scaledIntervals, 2, kCircumference * fPhaseDegrees * kTau / 360.f); |
| 156 | static constexpr SkScalar kThinCircumference = kThinRadius * kTau; |
| 157 | scaledIntervals[0] = kThinCircumference * kIntervals[i][0]; |
| 158 | scaledIntervals[1] = kThinCircumference * kIntervals[i][1]; |
| 159 | thinDEffects[i] = SkDashPathEffect::Make( |
| 160 | scaledIntervals, 2, kThinCircumference * fPhaseDegrees * kTau / 360.f); |
| 161 | } |
| 162 | |
| 163 | SkMatrix rotate; |
| 164 | rotate.setRotate(25.f); |
| 165 | static const SkMatrix kMatrices[]{ |
| 166 | SkMatrix::I(), |
| 167 | SkMatrix::MakeScale(1.2f), |
| 168 | SkMatrix::MakeAll(1, 0, 0, 0, -1, 0, 0, 0, 1), // y flipper |
| 169 | SkMatrix::MakeAll(-1, 0, 0, 0, 1, 0, 0, 0, 1), // x flipper |
| 170 | SkMatrix::MakeScale(0.7f), |
| 171 | rotate, |
| 172 | SkMatrix::Concat( |
| 173 | SkMatrix::Concat(SkMatrix::MakeAll(-1, 0, 0, 0, 1, 0, 0, 0, 1), rotate), |
| 174 | rotate) |
| 175 | }; |
| 176 | |
| 177 | SkPaint paint; |
| 178 | paint.setAntiAlias(true); |
| 179 | paint.setStrokeWidth(kStrokeWidth); |
| 180 | paint.setStyle(SkPaint::kStroke_Style); |
| 181 | |
| 182 | // Compute the union of bounds of all of our test cases. |
| 183 | SkRect bounds = SkRect::MakeEmpty(); |
| 184 | static const SkRect kBounds = kThinCircle.makeOutset(kThinStrokeWidth / 2.f, |
| 185 | kThinStrokeWidth / 2.f); |
| 186 | for (const auto& m : kMatrices) { |
| 187 | SkRect devBounds; |
| 188 | m.mapRect(&devBounds, kBounds); |
| 189 | bounds.join(devBounds); |
| 190 | } |
| 191 | |
| 192 | canvas->save(); |
| 193 | canvas->translate(-bounds.fLeft + kPad, -bounds.fTop + kPad); |
| 194 | for (size_t i = 0; i < SK_ARRAY_COUNT(deffects); ++i) { |
| 195 | canvas->save(); |
| 196 | for (const auto& m : kMatrices) { |
| 197 | canvas->save(); |
| 198 | canvas->concat(m); |
| 199 | |
| 200 | paint.setPathEffect(deffects[i]); |
| 201 | paint.setStrokeWidth(kStrokeWidth); |
| 202 | canvas->drawOval(kCircle, paint); |
| 203 | |
| 204 | paint.setPathEffect(thinDEffects[i]); |
| 205 | paint.setStrokeWidth(kThinStrokeWidth); |
| 206 | canvas->drawOval(kThinCircle, paint); |
| 207 | |
| 208 | canvas->restore(); |
| 209 | canvas->translate(bounds.width() + kPad, 0); |
| 210 | } |
| 211 | canvas->restore(); |
| 212 | canvas->translate(0, bounds.height() + kPad); |
| 213 | } |
| 214 | canvas->restore(); |
| 215 | } |
| 216 | |
| 217 | protected: |
Mike Klein | cd5104e | 2019-03-20 11:55:08 -0500 | [diff] [blame] | 218 | bool onAnimate(const AnimTimer& timer) override { |
Brian Salomon | 62e4f3d | 2018-04-20 13:54:11 -0400 | [diff] [blame] | 219 | fPhaseDegrees = timer.secs(); |
| 220 | return true; |
| 221 | } |
| 222 | |
| 223 | // Init with a non-zero phase for when run as a non-animating GM. |
| 224 | SkScalar fPhaseDegrees = 12.f; |
| 225 | }; |
| 226 | |
| 227 | DEF_GM(return new DashCircle2GM;) |
Cary Clark | dbf2aec | 2018-12-04 14:52:40 -0500 | [diff] [blame] | 228 | |
| 229 | DEF_SIMPLE_GM(maddash, canvas, 1600, 1600) { |
| 230 | canvas->drawRect({0, 0, 1600, 1600}, SkPaint()); |
| 231 | SkPaint p; |
| 232 | p.setColor(SK_ColorRED); |
| 233 | p.setAntiAlias(true); |
| 234 | p.setStyle(SkPaint::kStroke_Style); |
| 235 | p.setStrokeWidth(380); |
| 236 | |
| 237 | SkScalar intvls[] = { 2.5, 10 /* 1200 */ }; |
| 238 | p.setPathEffect(SkDashPathEffect::Make(intvls, 2, 0)); |
| 239 | |
| 240 | canvas->drawCircle(400, 400, 200, p); |
| 241 | |
| 242 | SkPath path; |
| 243 | path.moveTo(800, 400); |
| 244 | path.quadTo(1000, 400, 1000, 600); |
| 245 | path.quadTo(1000, 800, 800, 800); |
| 246 | path.quadTo(600, 800, 600, 600); |
| 247 | path.quadTo(600, 400, 800, 400); |
| 248 | path.close(); |
| 249 | canvas->translate(350, 150); |
| 250 | p.setStrokeWidth(320); |
| 251 | canvas->drawPath(path, p); |
| 252 | |
| 253 | path.reset(); |
| 254 | path.moveTo(800, 400); |
| 255 | path.cubicTo(900, 400, 1000, 500, 1000, 600); |
| 256 | path.cubicTo(1000, 700, 900, 800, 800, 800); |
| 257 | path.cubicTo(700, 800, 600, 700, 600, 600); |
| 258 | path.cubicTo(600, 500, 700, 400, 800, 400); |
| 259 | path.close(); |
| 260 | canvas->translate(-550, 500); |
| 261 | p.setStrokeWidth(300); |
| 262 | canvas->drawPath(path, p); |
| 263 | } |