Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017 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 | #include "Test.h" |
Jim Van Verth | 8664a1d | 2018-06-28 16:26:50 -0400 | [diff] [blame] | 8 | #include "SkPolyUtils.h" |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 9 | |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 10 | DEF_TEST(OffsetSimplePoly, reporter) { |
| 11 | SkTDArray<SkPoint> rrectPoly; |
| 12 | |
| 13 | /////////////////////////////////////////////////////////////////////// |
| 14 | // Try convex tests first |
| 15 | |
| 16 | // round rect |
| 17 | *rrectPoly.push() = SkPoint::Make(-100, 55); |
| 18 | *rrectPoly.push() = SkPoint::Make(100, 55); |
| 19 | *rrectPoly.push() = SkPoint::Make(100 + 2.5f, 50 + 4.330127f); |
| 20 | *rrectPoly.push() = SkPoint::Make(100 + 3.535534f, 50 + 3.535534f); |
| 21 | *rrectPoly.push() = SkPoint::Make(100 + 4.330127f, 50 + 2.5f); |
| 22 | *rrectPoly.push() = SkPoint::Make(105, 50); |
| 23 | *rrectPoly.push() = SkPoint::Make(105, -50); |
| 24 | *rrectPoly.push() = SkPoint::Make(100 + 4.330127f, -50 - 2.5f); |
| 25 | *rrectPoly.push() = SkPoint::Make(100 + 3.535534f, -50 - 3.535534f); |
| 26 | *rrectPoly.push() = SkPoint::Make(100 + 2.5f, -50 - 4.330127f); |
| 27 | *rrectPoly.push() = SkPoint::Make(100, -55); |
| 28 | *rrectPoly.push() = SkPoint::Make(-100, -55); |
| 29 | *rrectPoly.push() = SkPoint::Make(-100 - 2.5f, -50 - 4.330127f); |
| 30 | *rrectPoly.push() = SkPoint::Make(-100 - 3.535534f, -50 - 3.535534f); |
| 31 | *rrectPoly.push() = SkPoint::Make(-100 - 4.330127f, -50 - 2.5f); |
| 32 | *rrectPoly.push() = SkPoint::Make(-105, -50); |
| 33 | *rrectPoly.push() = SkPoint::Make(-105, 50); |
| 34 | *rrectPoly.push() = SkPoint::Make(-100 - 4.330127f, 50 + 2.5f); |
| 35 | *rrectPoly.push() = SkPoint::Make(-100 - 3.535534f, 50 + 3.535534f); |
| 36 | *rrectPoly.push() = SkPoint::Make(-100 - 2.5f, 50 + 4.330127f); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 37 | REPORTER_ASSERT(reporter, SkIsConvexPolygon(rrectPoly.begin(), rrectPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 38 | |
| 39 | // inset a little |
| 40 | SkTDArray<SkPoint> offsetPoly; |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 41 | bool result = SkOffsetSimplePolygon(rrectPoly.begin(), rrectPoly.count(), 3, &offsetPoly); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 42 | REPORTER_ASSERT(reporter, result); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 43 | REPORTER_ASSERT(reporter, SkIsConvexPolygon(offsetPoly.begin(), offsetPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 44 | |
| 45 | // inset to rect |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 46 | result = SkOffsetSimplePolygon(rrectPoly.begin(), rrectPoly.count(), 10, &offsetPoly); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 47 | REPORTER_ASSERT(reporter, result); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 48 | REPORTER_ASSERT(reporter, SkIsConvexPolygon(offsetPoly.begin(), offsetPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 49 | REPORTER_ASSERT(reporter, offsetPoly.count() == 4); |
| 50 | if (offsetPoly.count() == 4) { |
| 51 | REPORTER_ASSERT(reporter, offsetPoly[0].equals(-95, 45)); |
| 52 | REPORTER_ASSERT(reporter, offsetPoly[1].equals(95, 45)); |
| 53 | REPORTER_ASSERT(reporter, offsetPoly[2].equals(95, -45)); |
| 54 | REPORTER_ASSERT(reporter, offsetPoly[3].equals(-95, -45)); |
| 55 | } |
| 56 | |
| 57 | // just to full inset |
| 58 | // fails, but outputs a line segment |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 59 | result = SkOffsetSimplePolygon(rrectPoly.begin(), rrectPoly.count(), 55, &offsetPoly); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 60 | REPORTER_ASSERT(reporter, !result); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 61 | REPORTER_ASSERT(reporter, !SkIsConvexPolygon(offsetPoly.begin(), offsetPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 62 | REPORTER_ASSERT(reporter, offsetPoly.count() == 2); |
| 63 | if (offsetPoly.count() == 2) { |
| 64 | REPORTER_ASSERT(reporter, offsetPoly[0].equals(-50, 0)); |
| 65 | REPORTER_ASSERT(reporter, offsetPoly[1].equals(50, 0)); |
| 66 | } |
| 67 | |
| 68 | // past full inset |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 69 | result = SkOffsetSimplePolygon(rrectPoly.begin(), rrectPoly.count(), 75, &offsetPoly); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 70 | REPORTER_ASSERT(reporter, !result); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 71 | |
| 72 | // troublesome case |
| 73 | SkTDArray<SkPoint> clippedRRectPoly; |
| 74 | *clippedRRectPoly.push() = SkPoint::Make(335.928101f, 428.219055f); |
| 75 | *clippedRRectPoly.push() = SkPoint::Make(330.414459f, 423.034912f); |
| 76 | *clippedRRectPoly.push() = SkPoint::Make(325.749084f, 417.395508f); |
| 77 | *clippedRRectPoly.push() = SkPoint::Make(321.931946f, 411.300842f); |
| 78 | *clippedRRectPoly.push() = SkPoint::Make(318.963074f, 404.750977f); |
| 79 | *clippedRRectPoly.push() = SkPoint::Make(316.842468f, 397.745850f); |
| 80 | *clippedRRectPoly.push() = SkPoint::Make(315.570068f, 390.285522f); |
| 81 | *clippedRRectPoly.push() = SkPoint::Make(315.145966f, 382.369965f); |
| 82 | *clippedRRectPoly.push() = SkPoint::Make(315.570068f, 374.454346f); |
| 83 | *clippedRRectPoly.push() = SkPoint::Make(316.842468f, 366.994019f); |
| 84 | *clippedRRectPoly.push() = SkPoint::Make(318.963074f, 359.988892f); |
| 85 | *clippedRRectPoly.push() = SkPoint::Make(321.931946f, 353.439056f); |
| 86 | *clippedRRectPoly.push() = SkPoint::Make(325.749084f, 347.344421f); |
| 87 | *clippedRRectPoly.push() = SkPoint::Make(330.414459f, 341.705017f); |
| 88 | *clippedRRectPoly.push() = SkPoint::Make(335.928101f, 336.520813f); |
| 89 | *clippedRRectPoly.push() = SkPoint::Make(342.289948f, 331.791901f); |
| 90 | *clippedRRectPoly.push() = SkPoint::Make(377.312134f, 331.791901f); |
| 91 | *clippedRRectPoly.push() = SkPoint::Make(381.195313f, 332.532593f); |
| 92 | *clippedRRectPoly.push() = SkPoint::Make(384.464935f, 334.754700f); |
| 93 | *clippedRRectPoly.push() = SkPoint::Make(386.687042f, 338.024292f); |
| 94 | *clippedRRectPoly.push() = SkPoint::Make(387.427765f, 341.907532f); |
| 95 | *clippedRRectPoly.push() = SkPoint::Make(387.427765f, 422.832367f); |
| 96 | *clippedRRectPoly.push() = SkPoint::Make(386.687042f, 426.715576f); |
| 97 | *clippedRRectPoly.push() = SkPoint::Make(384.464935f, 429.985168f); |
| 98 | *clippedRRectPoly.push() = SkPoint::Make(381.195313f, 432.207275f); |
| 99 | *clippedRRectPoly.push() = SkPoint::Make(377.312134f, 432.947998f); |
| 100 | *clippedRRectPoly.push() = SkPoint::Make(342.289948f, 432.947998f); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 101 | REPORTER_ASSERT(reporter, SkIsConvexPolygon(clippedRRectPoly.begin(), |
| 102 | clippedRRectPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 103 | |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 104 | result = SkOffsetSimplePolygon(clippedRRectPoly.begin(), clippedRRectPoly.count(), 32.3699417f, |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 105 | &offsetPoly); |
| 106 | REPORTER_ASSERT(reporter, result); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 107 | REPORTER_ASSERT(reporter, SkIsConvexPolygon(offsetPoly.begin(), offsetPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 108 | |
| 109 | //////////////////////////////////////////////////////////////////////////////// |
| 110 | // Concave tests |
| 111 | |
| 112 | SkTDArray<SkPoint> starPoly; |
| 113 | *starPoly.push() = SkPoint::Make(0.0f, -50.0f); |
| 114 | *starPoly.push() = SkPoint::Make(14.43f, -25.0f); |
| 115 | *starPoly.push() = SkPoint::Make(43.30f, -25.0f); |
| 116 | *starPoly.push() = SkPoint::Make(28.86f, 0.0f); |
| 117 | *starPoly.push() = SkPoint::Make(43.30f, 25.0f); |
| 118 | *starPoly.push() = SkPoint::Make(14.43f, 25.0f); |
| 119 | *starPoly.push() = SkPoint::Make(0.0f, 50.0f); |
| 120 | *starPoly.push() = SkPoint::Make(-14.43f, 25.0f); |
| 121 | *starPoly.push() = SkPoint::Make(-43.30f, 25.0f); |
| 122 | *starPoly.push() = SkPoint::Make(-28.86f, 0.0f); |
| 123 | *starPoly.push() = SkPoint::Make(-43.30f, -25.0f); |
| 124 | *starPoly.push() = SkPoint::Make(-14.43f, -25.0f); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 125 | REPORTER_ASSERT(reporter, SkIsSimplePolygon(starPoly.begin(), starPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 126 | |
| 127 | // try a variety of distances |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 128 | result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), 0.1f, |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 129 | &offsetPoly); |
| 130 | REPORTER_ASSERT(reporter, result); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 131 | REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 132 | |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 133 | result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), 5.665f, |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 134 | &offsetPoly); |
| 135 | REPORTER_ASSERT(reporter, result); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 136 | REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 137 | |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 138 | result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), 28, |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 139 | &offsetPoly); |
| 140 | REPORTER_ASSERT(reporter, result); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 141 | REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 142 | |
| 143 | // down to a point |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 144 | result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), 28.866f, |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 145 | &offsetPoly); |
| 146 | REPORTER_ASSERT(reporter, !result); |
| 147 | |
| 148 | // and past |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 149 | result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), 50.5f, |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 150 | &offsetPoly); |
| 151 | REPORTER_ASSERT(reporter, !result); |
| 152 | |
| 153 | // and now out |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 154 | result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), -0.1f, |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 155 | &offsetPoly); |
| 156 | REPORTER_ASSERT(reporter, result); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 157 | REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 158 | |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 159 | result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), -5.6665f, |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 160 | &offsetPoly); |
| 161 | REPORTER_ASSERT(reporter, result); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 162 | REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 163 | |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 164 | result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), -50, |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 165 | &offsetPoly); |
| 166 | REPORTER_ASSERT(reporter, result); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 167 | REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 168 | |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 169 | result = SkOffsetSimplePolygon(starPoly.begin(), starPoly.count(), -100, |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 170 | &offsetPoly); |
| 171 | REPORTER_ASSERT(reporter, result); |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 172 | REPORTER_ASSERT(reporter, SkIsSimplePolygon(offsetPoly.begin(), offsetPoly.count())); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 173 | |
| 174 | SkTDArray<SkPoint> intersectingPoly; |
| 175 | *intersectingPoly.push() = SkPoint::Make(0.0f, -50.0f); |
| 176 | *intersectingPoly.push() = SkPoint::Make(14.43f, -25.0f); |
| 177 | *intersectingPoly.push() = SkPoint::Make(43.30f, -25.0f); |
| 178 | *intersectingPoly.push() = SkPoint::Make(-28.86f, 0.0f); |
| 179 | *intersectingPoly.push() = SkPoint::Make(43.30f, 25.0f); |
| 180 | *intersectingPoly.push() = SkPoint::Make(14.43f, 25.0f); |
| 181 | *intersectingPoly.push() = SkPoint::Make(0.0f, 50.0f); |
| 182 | *intersectingPoly.push() = SkPoint::Make(-14.43f, 25.0f); |
| 183 | *intersectingPoly.push() = SkPoint::Make(-43.30f, 25.0f); |
| 184 | *intersectingPoly.push() = SkPoint::Make(28.86f, 0.0f); |
| 185 | *intersectingPoly.push() = SkPoint::Make(-43.30f, -25.0f); |
| 186 | *intersectingPoly.push() = SkPoint::Make(-14.43f, -25.0f); |
| 187 | |
Jim Van Verth | 8664a1d | 2018-06-28 16:26:50 -0400 | [diff] [blame] | 188 | // SkOffsetSimplePolygon now assumes that the input is simple, so we'll just check for that |
Jim Van Verth | 6784ffa | 2018-07-03 16:12:39 -0400 | [diff] [blame^] | 189 | result = SkIsSimplePolygon(intersectingPoly.begin(), intersectingPoly.count()); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 190 | REPORTER_ASSERT(reporter, !result); |
Jim Van Verth | 4db18ed | 2018-04-03 10:00:37 -0400 | [diff] [blame] | 191 | } |