bsalomon | 71c5eee | 2016-08-19 10:53:13 -0700 | [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 | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 8 | #include "gm/gm.h" |
| 9 | #include "include/core/SkCanvas.h" |
Ben Wagner | 7fde8e1 | 2019-05-01 17:28:53 -0400 | [diff] [blame] | 10 | #include "include/core/SkColor.h" |
| 11 | #include "include/core/SkPaint.h" |
| 12 | #include "include/core/SkPath.h" |
| 13 | #include "include/core/SkPathEffect.h" |
| 14 | #include "include/core/SkRect.h" |
| 15 | #include "include/core/SkScalar.h" |
| 16 | #include "include/core/SkTypes.h" |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 17 | #include "include/effects/SkDashPathEffect.h" |
Ben Wagner | 7fde8e1 | 2019-05-01 17:28:53 -0400 | [diff] [blame] | 18 | #include "include/private/SkFloatBits.h" |
| 19 | #include "include/private/SkTArray.h" |
| 20 | |
| 21 | #include <functional> |
bsalomon | 71c5eee | 2016-08-19 10:53:13 -0700 | [diff] [blame] | 22 | |
mtklein | dbfd7ab | 2016-09-01 11:24:54 -0700 | [diff] [blame] | 23 | constexpr SkScalar kStarts[] = {0.f, 10.f, 30.f, 45.f, 90.f, 165.f, 180.f, 270.f}; |
| 24 | constexpr SkScalar kSweeps[] = {1.f, 45.f, 90.f, 130.f, 180.f, 184.f, 300.f, 355.f}; |
| 25 | constexpr SkScalar kDiameter = 40.f; |
| 26 | constexpr SkRect kRect = {0.f, 0.f, kDiameter, kDiameter}; |
| 27 | constexpr int kW = 1000; |
| 28 | constexpr int kH = 1000; |
| 29 | constexpr SkScalar kPad = 20.f; |
bsalomon | 71c5eee | 2016-08-19 10:53:13 -0700 | [diff] [blame] | 30 | |
| 31 | void draw_arcs(SkCanvas* canvas, std::function<void(SkPaint*)> configureStyle) { |
| 32 | // Draws grid of arcs with different start/sweep angles in red and their complement arcs in |
| 33 | // blue. |
| 34 | auto drawGrid = [canvas, &configureStyle] (SkScalar x, SkScalar y, bool useCenter, bool aa) { |
| 35 | SkPaint p0; |
| 36 | p0.setColor(SK_ColorRED); |
| 37 | p0.setAntiAlias(aa); |
| 38 | // Set a reasonable stroke width that configureStyle can override. |
| 39 | p0.setStrokeWidth(15.f); |
bsalomon | 71c5eee | 2016-08-19 10:53:13 -0700 | [diff] [blame] | 40 | SkPaint p1 = p0; |
| 41 | p1.setColor(SK_ColorBLUE); |
bsalomon | 4c54788 | 2016-08-19 13:41:28 -0700 | [diff] [blame] | 42 | // Use alpha so we see magenta on overlap between arc and its complement. |
| 43 | p0.setAlpha(100); |
| 44 | p1.setAlpha(100); |
bsalomon | 71c5eee | 2016-08-19 10:53:13 -0700 | [diff] [blame] | 45 | configureStyle(&p0); |
| 46 | configureStyle(&p1); |
| 47 | |
| 48 | canvas->save(); |
| 49 | canvas->translate(kPad + x, kPad + y); |
| 50 | for (auto start : kStarts) { |
| 51 | canvas->save(); |
| 52 | for (auto sweep : kSweeps) { |
| 53 | canvas->drawArc(kRect, start, sweep, useCenter, p0); |
| 54 | canvas->drawArc(kRect, start, -(360.f - sweep), useCenter, p1); |
| 55 | canvas->translate(kRect.width() + kPad, 0.f); |
| 56 | } |
| 57 | canvas->restore(); |
| 58 | canvas->translate(0, kRect.height() + kPad); |
| 59 | } |
| 60 | canvas->restore(); |
| 61 | }; |
| 62 | // Draw a grids for combo of enabling/disabling aa and using center. |
mtklein | dbfd7ab | 2016-09-01 11:24:54 -0700 | [diff] [blame] | 63 | constexpr SkScalar kGridW = kW / 2.f; |
| 64 | constexpr SkScalar kGridH = kH / 2.f; |
bsalomon | 71c5eee | 2016-08-19 10:53:13 -0700 | [diff] [blame] | 65 | drawGrid(0.f , 0.f , false, false); |
| 66 | drawGrid(kGridW, 0.f , true , false); |
| 67 | drawGrid(0.f , kGridH, false, true ); |
| 68 | drawGrid(kGridW, kGridH, true , true ); |
| 69 | // Draw separators between the grids. |
| 70 | SkPaint linePaint; |
| 71 | linePaint.setAntiAlias(true); |
| 72 | linePaint.setColor(SK_ColorBLACK); |
| 73 | canvas->drawLine(kGridW, 0.f , kGridW, SkIntToScalar(kH), linePaint); |
| 74 | canvas->drawLine(0.f , kGridH, SkIntToScalar(kW), kGridH, linePaint); |
| 75 | } |
| 76 | |
| 77 | #define DEF_ARC_GM(name) DEF_SIMPLE_GM(circular_arcs_##name, canvas, kW, kH) |
| 78 | |
bsalomon | 4c54788 | 2016-08-19 13:41:28 -0700 | [diff] [blame] | 79 | DEF_ARC_GM(fill) { |
bsalomon | 71c5eee | 2016-08-19 10:53:13 -0700 | [diff] [blame] | 80 | auto setFill = [] (SkPaint*p) { p->setStyle(SkPaint::kFill_Style); }; |
| 81 | draw_arcs(canvas, setFill); |
| 82 | } |
| 83 | |
| 84 | DEF_ARC_GM(hairline) { |
| 85 | auto setHairline = [] (SkPaint* p) { |
| 86 | p->setStyle(SkPaint::kStroke_Style); |
| 87 | p->setStrokeWidth(0.f); |
| 88 | }; |
| 89 | draw_arcs(canvas, setHairline); |
| 90 | } |
| 91 | |
| 92 | DEF_ARC_GM(stroke_butt) { |
| 93 | auto setStroke = [](SkPaint* p) { |
| 94 | p->setStyle(SkPaint::kStroke_Style); |
| 95 | p->setStrokeCap(SkPaint::kButt_Cap); |
| 96 | }; |
| 97 | draw_arcs(canvas, setStroke); |
| 98 | } |
| 99 | |
| 100 | DEF_ARC_GM(stroke_square) { |
| 101 | auto setStroke = [] (SkPaint* p) { |
| 102 | p->setStyle(SkPaint::kStroke_Style); |
| 103 | p->setStrokeCap(SkPaint::kSquare_Cap); |
| 104 | }; |
| 105 | draw_arcs(canvas, setStroke); |
| 106 | } |
| 107 | |
| 108 | DEF_ARC_GM(stroke_round) { |
| 109 | auto setStroke = [] (SkPaint* p) { |
| 110 | p->setStyle(SkPaint::kStroke_Style); |
| 111 | p->setStrokeCap(SkPaint::kRound_Cap); |
| 112 | }; |
| 113 | draw_arcs(canvas, setStroke); |
| 114 | } |
bsalomon | ac1d0ab | 2016-08-22 10:00:14 -0700 | [diff] [blame] | 115 | |
bsalomon | 4c261d0 | 2016-08-22 13:10:46 -0700 | [diff] [blame] | 116 | DEF_ARC_GM(stroke_and_fill_butt) { |
| 117 | auto setStroke = [] (SkPaint* p) { |
| 118 | p->setStyle(SkPaint::kStrokeAndFill_Style); |
| 119 | p->setStrokeCap(SkPaint::kButt_Cap); |
| 120 | }; |
| 121 | draw_arcs(canvas, setStroke); |
| 122 | } |
| 123 | |
| 124 | DEF_ARC_GM(stroke_and_fill_square) { |
| 125 | auto setStroke = [] (SkPaint* p) { |
| 126 | p->setStyle(SkPaint::kStrokeAndFill_Style); |
| 127 | p->setStrokeCap(SkPaint::kSquare_Cap); |
| 128 | }; |
| 129 | draw_arcs(canvas, setStroke); |
| 130 | } |
| 131 | |
| 132 | DEF_ARC_GM(stroke_and_fill_round) { |
bsalomon | ac1d0ab | 2016-08-22 10:00:14 -0700 | [diff] [blame] | 133 | auto setStroke = [] (SkPaint* p) { |
| 134 | p->setStyle(SkPaint::kStrokeAndFill_Style); |
| 135 | p->setStrokeCap(SkPaint::kRound_Cap); |
| 136 | }; |
| 137 | draw_arcs(canvas, setStroke); |
| 138 | } |
bsalomon | 21af9ca | 2016-08-25 12:29:23 -0700 | [diff] [blame] | 139 | |
| 140 | DEF_SIMPLE_GM(circular_arcs_weird, canvas, 1000, 400) { |
mtklein | dbfd7ab | 2016-09-01 11:24:54 -0700 | [diff] [blame] | 141 | constexpr SkScalar kS = 50; |
bsalomon | 21af9ca | 2016-08-25 12:29:23 -0700 | [diff] [blame] | 142 | struct Arc { |
| 143 | SkRect fOval; |
| 144 | SkScalar fStart; |
| 145 | SkScalar fSweep; |
| 146 | }; |
mtklein | dbfd7ab | 2016-09-01 11:24:54 -0700 | [diff] [blame] | 147 | const Arc noDrawArcs[] = { |
bsalomon | 21af9ca | 2016-08-25 12:29:23 -0700 | [diff] [blame] | 148 | // no sweep |
| 149 | {SkRect::MakeWH(kS, kS), 0, 0}, |
| 150 | // empty rect in x |
| 151 | {SkRect::MakeWH(-kS, kS), 0, 90}, |
| 152 | // empty rect in y |
| 153 | {SkRect::MakeWH(kS, -kS), 0, 90}, |
| 154 | // empty rect in x and y |
| 155 | {SkRect::MakeWH( 0, 0), 0, 90}, |
| 156 | }; |
mtklein | dbfd7ab | 2016-09-01 11:24:54 -0700 | [diff] [blame] | 157 | const Arc arcs[] = { |
bsalomon | 21af9ca | 2016-08-25 12:29:23 -0700 | [diff] [blame] | 158 | // large start |
| 159 | {SkRect::MakeWH(kS, kS), 810.f, 90.f}, |
| 160 | // large negative start |
| 161 | {SkRect::MakeWH(kS, kS), -810.f, 90.f}, |
| 162 | // exactly 360 sweep |
| 163 | {SkRect::MakeWH(kS, kS), 0.f, 360.f}, |
| 164 | // exactly -360 sweep |
| 165 | {SkRect::MakeWH(kS, kS), 0.f, -360.f}, |
| 166 | // exactly 540 sweep |
| 167 | {SkRect::MakeWH(kS, kS), 0.f, 540.f}, |
| 168 | // exactly -540 sweep |
| 169 | {SkRect::MakeWH(kS, kS), 0.f, -540.f}, |
| 170 | // generic large sweep and large start |
| 171 | {SkRect::MakeWH(kS, kS), 1125.f, 990.f}, |
| 172 | }; |
| 173 | SkTArray<SkPaint> paints; |
| 174 | // fill |
| 175 | paints.push_back(); |
| 176 | // stroke |
| 177 | paints.push_back().setStyle(SkPaint::kStroke_Style); |
| 178 | paints.back().setStrokeWidth(kS / 6.f); |
| 179 | // hairline |
| 180 | paints.push_back().setStyle(SkPaint::kStroke_Style); |
| 181 | paints.back().setStrokeWidth(0.f); |
| 182 | // stroke and fill |
| 183 | paints.push_back().setStyle(SkPaint::kStrokeAndFill_Style); |
| 184 | paints.back().setStrokeWidth(kS / 6.f); |
| 185 | // dash effect |
| 186 | paints.push_back().setStyle(SkPaint::kStroke_Style); |
| 187 | paints.back().setStrokeWidth(kS / 6.f); |
mtklein | dbfd7ab | 2016-09-01 11:24:54 -0700 | [diff] [blame] | 188 | constexpr SkScalar kDashIntervals[] = {kS / 15, 2 * kS / 15}; |
bsalomon | 21af9ca | 2016-08-25 12:29:23 -0700 | [diff] [blame] | 189 | paints.back().setPathEffect(SkDashPathEffect::Make(kDashIntervals, 2, 0.f)); |
| 190 | |
| 191 | canvas->translate(kPad, kPad); |
| 192 | // This loop should draw nothing. |
| 193 | for (auto arc : noDrawArcs) { |
| 194 | for (auto paint : paints) { |
| 195 | paint.setAntiAlias(true); |
| 196 | canvas->drawArc(arc.fOval, arc.fStart, arc.fSweep, false, paint); |
| 197 | canvas->drawArc(arc.fOval, arc.fStart, arc.fSweep, true, paint); |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | SkPaint linePaint; |
| 202 | linePaint.setAntiAlias(true); |
| 203 | linePaint.setColor(SK_ColorRED); |
| 204 | SkScalar midX = SK_ARRAY_COUNT(arcs) * (kS + kPad) - kPad/2.f; |
| 205 | SkScalar height = paints.count() * (kS + kPad); |
| 206 | canvas->drawLine(midX, -kPad, midX, height, linePaint); |
| 207 | |
| 208 | for (auto paint : paints) { |
| 209 | paint.setAntiAlias(true); |
| 210 | canvas->save(); |
| 211 | for (auto arc : arcs) { |
| 212 | canvas->drawArc(arc.fOval, arc.fStart, arc.fSweep, false, paint); |
| 213 | canvas->translate(kS + kPad, 0.f); |
| 214 | } |
| 215 | for (auto arc : arcs) { |
| 216 | canvas->drawArc(arc.fOval, arc.fStart, arc.fSweep, true, paint); |
| 217 | canvas->translate(kS + kPad, 0.f); |
| 218 | } |
| 219 | canvas->restore(); |
| 220 | canvas->translate(0, kS + kPad); |
| 221 | } |
| 222 | } |
caryclark | f71ab8f | 2016-08-26 09:54:25 -0700 | [diff] [blame] | 223 | |
| 224 | DEF_SIMPLE_GM(onebadarc, canvas, 100, 100) { |
| 225 | SkPath path; |
| 226 | path.moveTo(SkBits2Float(0x41a00000), SkBits2Float(0x41a00000)); // 20, 20 |
| 227 | path.lineTo(SkBits2Float(0x4208918c), SkBits2Float(0x4208918c)); // 34.1421f, 34.1421f |
| 228 | path.conicTo(SkBits2Float(0x41a00000), SkBits2Float(0x42412318), // 20, 48.2843f |
| 229 | SkBits2Float(0x40bb73a0), SkBits2Float(0x4208918c), // 5.85786f, 34.1421f |
| 230 | SkBits2Float(0x3f3504f3)); // 0.707107f |
| 231 | path.quadTo(SkBits2Float(0x40bb73a0), SkBits2Float(0x4208918c), // 5.85786f, 34.1421f |
| 232 | SkBits2Float(0x40bb73a2), SkBits2Float(0x4208918c)); // 5.85787f, 34.1421f |
| 233 | path.lineTo(SkBits2Float(0x41a00000), SkBits2Float(0x41a00000)); // 20, 20 |
| 234 | path.close(); |
| 235 | SkPaint p0; |
| 236 | p0.setColor(SK_ColorRED); |
| 237 | p0.setStrokeWidth(15.f); |
| 238 | p0.setStyle(SkPaint::kStroke_Style); |
| 239 | p0.setAlpha(100); |
| 240 | canvas->translate(20, 0); |
| 241 | canvas->drawPath(path, p0); |
| 242 | |
| 243 | SkRect kRect = { 60, 0, 100, 40}; |
| 244 | canvas->drawArc(kRect, 45, 90, true, p0); |
| 245 | } |
Brian Osman | e3deee1 | 2018-11-20 11:10:15 -0500 | [diff] [blame] | 246 | |
| 247 | DEF_SIMPLE_GM(crbug_888453, canvas, 480, 150) { |
| 248 | // Two GPU path renderers were using a too-large tolerance when chopping connics to quads. |
| 249 | // This manifested as not-very-round circular arcs at certain radii. All the arcs being drawn |
| 250 | // here should look like circles. |
| 251 | SkPaint fill; |
| 252 | fill.setAntiAlias(true); |
| 253 | SkPaint hairline = fill; |
| 254 | hairline.setStyle(SkPaint::kStroke_Style); |
| 255 | SkPaint stroke = hairline; |
| 256 | stroke.setStrokeWidth(2.0f); |
| 257 | int x = 4; |
| 258 | int y0 = 25, y1 = 75, y2 = 125; |
| 259 | for (int r = 2; r <= 20; ++r) { |
| 260 | canvas->drawArc(SkRect::MakeXYWH(x - r, y0 - r, 2 * r, 2 * r), 0, 360, false, fill); |
| 261 | canvas->drawArc(SkRect::MakeXYWH(x - r, y1 - r, 2 * r, 2 * r), 0, 360, false, hairline); |
| 262 | canvas->drawArc(SkRect::MakeXYWH(x - r, y2 - r, 2 * r, 2 * r), 0, 360, false, stroke); |
| 263 | x += 2 * r + 4; |
| 264 | } |
| 265 | } |
Brian Salomon | 3517aa7 | 2019-12-11 08:16:22 -0500 | [diff] [blame] | 266 | |
| 267 | DEF_SIMPLE_GM(circular_arc_stroke_matrix, canvas, 820, 1090) { |
| 268 | static constexpr SkScalar kRadius = 40.f; |
| 269 | static constexpr SkScalar kStrokeWidth = 5.f; |
| 270 | static constexpr SkScalar kStart = 89.f; |
| 271 | static constexpr SkScalar kSweep = 180.f/SK_ScalarPI; // one radian |
| 272 | |
| 273 | SkTArray<SkMatrix> matrices; |
| 274 | matrices.push_back().setRotate(kRadius, kRadius, 45.f); |
| 275 | matrices.push_back(SkMatrix::I()); |
| 276 | matrices.push_back().setAll(-1, 0, 2*kRadius, |
| 277 | 0, 1, 0, |
| 278 | 0, 0, 1); |
| 279 | matrices.push_back().setAll( 1, 0, 0, |
| 280 | 0, -1, 2*kRadius, |
| 281 | 0, 0, 1); |
| 282 | matrices.push_back().setAll( 1, 0, 0, |
| 283 | 0, -1, 2*kRadius, |
| 284 | 0, 0, 1); |
| 285 | matrices.push_back().setAll( 0, -1, 2*kRadius, |
| 286 | -1, 0, 2*kRadius, |
| 287 | 0, 0, 1); |
| 288 | matrices.push_back().setAll( 0, -1, 2*kRadius, |
| 289 | 1, 0, 0, |
| 290 | 0, 0, 1); |
| 291 | matrices.push_back().setAll( 0, 1, 0, |
| 292 | 1, 0, 0, |
| 293 | 0, 0, 1); |
| 294 | matrices.push_back().setAll( 0, 1, 0, |
| 295 | -1, 0, 2*kRadius, |
| 296 | 0, 0, 1); |
| 297 | int baseMatrixCnt = matrices.count(); |
| 298 | |
| 299 | |
| 300 | SkMatrix tinyCW; |
| 301 | tinyCW.setRotate(0.001f, kRadius, kRadius); |
| 302 | for (int i = 0; i < baseMatrixCnt; ++i) { |
| 303 | matrices.push_back().setConcat(matrices[i], tinyCW); |
| 304 | } |
| 305 | SkMatrix tinyCCW; |
| 306 | tinyCCW.setRotate(-0.001f, kRadius, kRadius); |
| 307 | for (int i = 0; i < baseMatrixCnt; ++i) { |
| 308 | matrices.push_back().setConcat(matrices[i], tinyCCW); |
| 309 | } |
| 310 | SkMatrix cw45; |
| 311 | cw45.setRotate(45.f, kRadius, kRadius); |
| 312 | for (int i = 0; i < baseMatrixCnt; ++i) { |
| 313 | matrices.push_back().setConcat(matrices[i], cw45); |
| 314 | } |
| 315 | |
| 316 | int x = 0; |
| 317 | int y = 0; |
| 318 | static constexpr SkScalar kPad = 2*kStrokeWidth; |
| 319 | canvas->translate(kPad, kPad); |
| 320 | auto bounds = SkRect::MakeWH(2*kRadius, 2*kRadius); |
| 321 | for (auto cap : {SkPaint::kRound_Cap, SkPaint::kButt_Cap, SkPaint::kSquare_Cap}) { |
| 322 | for (const auto& m : matrices) { |
| 323 | SkPaint paint; |
| 324 | paint.setStrokeCap(cap); |
| 325 | paint.setAntiAlias(true); |
| 326 | paint.setStyle(SkPaint::kStroke_Style); |
| 327 | paint.setStrokeWidth(kStrokeWidth); |
| 328 | canvas->save(); |
| 329 | canvas->translate(x * (2*kRadius + kPad), y * (2*kRadius + kPad)); |
| 330 | canvas->concat(m); |
| 331 | paint.setColor(SK_ColorRED); |
| 332 | paint.setAlpha(0x80); |
| 333 | canvas->drawArc(bounds, kStart, kSweep, false, paint); |
| 334 | paint.setColor(SK_ColorBLUE); |
| 335 | paint.setAlpha(0x80); |
| 336 | canvas->drawArc(bounds, kStart, kSweep - 360.f, false, paint); |
| 337 | canvas->restore(); |
| 338 | ++x; |
| 339 | if (x == baseMatrixCnt) { |
| 340 | x = 0; |
| 341 | ++y; |
| 342 | } |
| 343 | } |
| 344 | } |
| 345 | } |