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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "ui/gfx/quad_f.h" | |
| 6 | |
| 7 #include "base/basictypes.h" | |
| 8 #include "testing/gtest/include/gtest/gtest.h" | |
| 9 #include "ui/gfx/rect_f.h" | |
| 10 | |
| 11 namespace gfx { | |
| 12 | |
| 13 TEST(QuadTest, Construction) { | |
| 14 // Verify constructors. | |
| 15 PointF a(1, 1); | |
| 16 PointF b(2, 1); | |
| 17 PointF c(2, 2); | |
| 18 PointF d(1, 2); | |
| 19 PointF e; | |
| 20 QuadF q1; | |
| 21 QuadF q2(e, e, e, e); | |
| 22 QuadF q3(a, b, c, d); | |
| 23 QuadF q4(BoundingRect(a, c)); | |
| 24 EXPECT_EQ(q1.ToString(), q2.ToString()); | |
| 25 EXPECT_EQ(q3.ToString(), q4.ToString()); | |
| 26 | |
| 27 // Verify getters. | |
| 28 EXPECT_EQ(q3.p1().ToString(), a.ToString()); | |
| 29 EXPECT_EQ(q3.p2().ToString(), b.ToString()); | |
| 30 EXPECT_EQ(q3.p3().ToString(), c.ToString()); | |
| 31 EXPECT_EQ(q3.p4().ToString(), d.ToString()); | |
| 32 | |
| 33 // Verify setters. | |
| 34 q3.set_p1(b); | |
| 35 q3.set_p2(c); | |
| 36 q3.set_p3(d); | |
| 37 q3.set_p4(a); | |
| 38 EXPECT_EQ(q3.p1().ToString(), b.ToString()); | |
| 39 EXPECT_EQ(q3.p2().ToString(), c.ToString()); | |
| 40 EXPECT_EQ(q3.p3().ToString(), d.ToString()); | |
| 41 EXPECT_EQ(q3.p4().ToString(), a.ToString()); | |
| 42 | |
| 43 // Verify operator=(Rect) | |
| 44 EXPECT_NE(q1.ToString(), q4.ToString()); | |
| 45 q1 = BoundingRect(a, c); | |
| 46 EXPECT_EQ(q1.ToString(), q4.ToString()); | |
| 47 | |
| 48 // Verify operator=(Quad) | |
| 49 EXPECT_NE(q1.ToString(), q3.ToString()); | |
| 50 q1 = q3; | |
| 51 EXPECT_EQ(q1.ToString(), q3.ToString()); | |
| 52 } | |
| 53 | |
| 54 TEST(QuadTest, AddingVectors) { | |
| 55 PointF a(1, 1); | |
| 56 PointF b(2, 1); | |
| 57 PointF c(2, 2); | |
| 58 PointF d(1, 2); | |
| 59 Vector2dF v(3.5f, -2.5f); | |
| 60 | |
| 61 QuadF q1(a, b, c, d); | |
| 62 QuadF added = q1 + v; | |
| 63 q1 += v; | |
| 64 QuadF expected1(PointF(4.5f, -1.5f), | |
| 65 PointF(5.5f, -1.5f), | |
| 66 PointF(5.5f, -0.5f), | |
| 67 PointF(4.5f, -0.5f)); | |
| 68 EXPECT_EQ(expected1.ToString(), added.ToString()); | |
| 69 EXPECT_EQ(expected1.ToString(), q1.ToString()); | |
| 70 | |
| 71 QuadF q2(a, b, c, d); | |
| 72 QuadF subtracted = q2 - v; | |
| 73 q2 -= v; | |
| 74 QuadF expected2(PointF(-2.5f, 3.5f), | |
| 75 PointF(-1.5f, 3.5f), | |
| 76 PointF(-1.5f, 4.5f), | |
| 77 PointF(-2.5f, 4.5f)); | |
| 78 EXPECT_EQ(expected2.ToString(), subtracted.ToString()); | |
| 79 EXPECT_EQ(expected2.ToString(), q2.ToString()); | |
| 80 | |
| 81 QuadF q3(a, b, c, d); | |
| 82 q3 += v; | |
| 83 q3 -= v; | |
| 84 EXPECT_EQ(QuadF(a, b, c, d).ToString(), q3.ToString()); | |
| 85 EXPECT_EQ(q3.ToString(), (q3 + v - v).ToString()); | |
| 86 } | |
| 87 | |
| 88 TEST(QuadTest, IsRectilinear) { | |
| 89 PointF a(1, 1); | |
| 90 PointF b(2, 1); | |
| 91 PointF c(2, 2); | |
| 92 PointF d(1, 2); | |
| 93 Vector2dF v(3.5f, -2.5f); | |
| 94 | |
| 95 EXPECT_TRUE(QuadF().IsRectilinear()); | |
| 96 EXPECT_TRUE(QuadF(a, b, c, d).IsRectilinear()); | |
| 97 EXPECT_TRUE((QuadF(a, b, c, d) + v).IsRectilinear()); | |
| 98 | |
| 99 float epsilon = std::numeric_limits<float>::epsilon(); | |
| 100 PointF a2(1 + epsilon / 2, 1 + epsilon / 2); | |
| 101 PointF b2(2 + epsilon / 2, 1 + epsilon / 2); | |
| 102 PointF c2(2 + epsilon / 2, 2 + epsilon / 2); | |
| 103 PointF d2(1 + epsilon / 2, 2 + epsilon / 2); | |
| 104 EXPECT_TRUE(QuadF(a2, b, c, d).IsRectilinear()); | |
| 105 EXPECT_TRUE((QuadF(a2, b, c, d) + v).IsRectilinear()); | |
| 106 EXPECT_TRUE(QuadF(a, b2, c, d).IsRectilinear()); | |
| 107 EXPECT_TRUE((QuadF(a, b2, c, d) + v).IsRectilinear()); | |
| 108 EXPECT_TRUE(QuadF(a, b, c2, d).IsRectilinear()); | |
| 109 EXPECT_TRUE((QuadF(a, b, c2, d) + v).IsRectilinear()); | |
| 110 EXPECT_TRUE(QuadF(a, b, c, d2).IsRectilinear()); | |
| 111 EXPECT_TRUE((QuadF(a, b, c, d2) + v).IsRectilinear()); | |
| 112 | |
| 113 struct { | |
| 114 PointF a_off, b_off, c_off, d_off; | |
| 115 } tests[] = { | |
| 116 { | |
| 117 PointF(1, 1.00001f), | |
| 118 PointF(2, 1.00001f), | |
| 119 PointF(2, 2.00001f), | |
| 120 PointF(1, 2.00001f) | |
| 121 }, | |
| 122 { | |
| 123 PointF(1.00001f, 1), | |
| 124 PointF(2.00001f, 1), | |
| 125 PointF(2.00001f, 2), | |
| 126 PointF(1.00001f, 2) | |
| 127 }, | |
| 128 { | |
| 129 PointF(1.00001f, 1.00001f), | |
| 130 PointF(2.00001f, 1.00001f), | |
| 131 PointF(2.00001f, 2.00001f), | |
| 132 PointF(1.00001f, 2.00001f) | |
| 133 }, | |
| 134 { | |
| 135 PointF(1, 0.99999f), | |
| 136 PointF(2, 0.99999f), | |
| 137 PointF(2, 1.99999f), | |
| 138 PointF(1, 1.99999f) | |
| 139 }, | |
| 140 { | |
| 141 PointF(0.99999f, 1), | |
| 142 PointF(1.99999f, 1), | |
| 143 PointF(1.99999f, 2), | |
| 144 PointF(0.99999f, 2) | |
| 145 }, | |
| 146 { | |
| 147 PointF(0.99999f, 0.99999f), | |
| 148 PointF(1.99999f, 0.99999f), | |
| 149 PointF(1.99999f, 1.99999f), | |
| 150 PointF(0.99999f, 1.99999f) | |
| 151 } | |
| 152 }; | |
| 153 | |
| 154 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) { | |
| 155 PointF a_off = tests[i].a_off; | |
| 156 PointF b_off = tests[i].b_off; | |
| 157 PointF c_off = tests[i].c_off; | |
| 158 PointF d_off = tests[i].d_off; | |
| 159 | |
| 160 EXPECT_FALSE(QuadF(a_off, b, c, d).IsRectilinear()); | |
| 161 EXPECT_FALSE((QuadF(a_off, b, c, d) + v).IsRectilinear()); | |
| 162 EXPECT_FALSE(QuadF(a, b_off, c, d).IsRectilinear()); | |
| 163 EXPECT_FALSE((QuadF(a, b_off, c, d) + v).IsRectilinear()); | |
| 164 EXPECT_FALSE(QuadF(a, b, c_off, d).IsRectilinear()); | |
| 165 EXPECT_FALSE((QuadF(a, b, c_off, d) + v).IsRectilinear()); | |
| 166 EXPECT_FALSE(QuadF(a, b, c, d_off).IsRectilinear()); | |
| 167 EXPECT_FALSE((QuadF(a, b, c, d_off) + v).IsRectilinear()); | |
| 168 EXPECT_FALSE(QuadF(a_off, b, c_off, d).IsRectilinear()); | |
| 169 EXPECT_FALSE((QuadF(a_off, b, c_off, d) + v).IsRectilinear()); | |
| 170 EXPECT_FALSE(QuadF(a, b_off, c, d_off).IsRectilinear()); | |
| 171 EXPECT_FALSE((QuadF(a, b_off, c, d_off) + v).IsRectilinear()); | |
| 172 EXPECT_FALSE(QuadF(a, b_off, c_off, d_off).IsRectilinear()); | |
| 173 EXPECT_FALSE((QuadF(a, b_off, c_off, d_off) + v).IsRectilinear()); | |
| 174 EXPECT_FALSE(QuadF(a_off, b, c_off, d_off).IsRectilinear()); | |
| 175 EXPECT_FALSE((QuadF(a_off, b, c_off, d_off) + v).IsRectilinear()); | |
| 176 EXPECT_FALSE(QuadF(a_off, b_off, c, d_off).IsRectilinear()); | |
| 177 EXPECT_FALSE((QuadF(a_off, b_off, c, d_off) + v).IsRectilinear()); | |
| 178 EXPECT_FALSE(QuadF(a_off, b_off, c_off, d).IsRectilinear()); | |
| 179 EXPECT_FALSE((QuadF(a_off, b_off, c_off, d) + v).IsRectilinear()); | |
| 180 EXPECT_TRUE(QuadF(a_off, b_off, c_off, d_off).IsRectilinear()); | |
| 181 EXPECT_TRUE((QuadF(a_off, b_off, c_off, d_off) + v).IsRectilinear()); | |
| 182 } | |
| 183 } | |
| 184 | |
| 185 TEST(QuadTest, IsCounterClockwise) { | |
| 186 PointF a1(1, 1); | |
| 187 PointF b1(2, 1); | |
| 188 PointF c1(2, 2); | |
| 189 PointF d1(1, 2); | |
| 190 EXPECT_FALSE(QuadF(a1, b1, c1, d1).IsCounterClockwise()); | |
| 191 EXPECT_FALSE(QuadF(b1, c1, d1, a1).IsCounterClockwise()); | |
| 192 EXPECT_TRUE(QuadF(a1, d1, c1, b1).IsCounterClockwise()); | |
| 193 EXPECT_TRUE(QuadF(c1, b1, a1, d1).IsCounterClockwise()); | |
| 194 | |
| 195 // Slightly more complicated quads should work just as easily. | |
| 196 PointF a2(1.3f, 1.4f); | |
| 197 PointF b2(-0.7f, 4.9f); | |
| 198 PointF c2(1.8f, 6.2f); | |
| 199 PointF d2(2.1f, 1.6f); | |
| 200 EXPECT_TRUE(QuadF(a2, b2, c2, d2).IsCounterClockwise()); | |
| 201 EXPECT_TRUE(QuadF(b2, c2, d2, a2).IsCounterClockwise()); | |
| 202 EXPECT_FALSE(QuadF(a2, d2, c2, b2).IsCounterClockwise()); | |
| 203 EXPECT_FALSE(QuadF(c2, b2, a2, d2).IsCounterClockwise()); | |
| 204 | |
| 205 // Quads with 3 collinear points should work correctly, too. | |
| 206 PointF a3(0, 0); | |
| 207 PointF b3(1, 0); | |
| 208 PointF c3(2, 0); | |
| 209 PointF d3(1, 1); | |
| 210 EXPECT_FALSE(QuadF(a3, b3, c3, d3).IsCounterClockwise()); | |
| 211 EXPECT_FALSE(QuadF(b3, c3, d3, a3).IsCounterClockwise()); | |
| 212 EXPECT_TRUE(QuadF(a3, d3, c3, b3).IsCounterClockwise()); | |
| 213 // The next expectation in particular would fail for an implementation | |
| 214 // that incorrectly uses only a cross product of the first 3 vertices. | |
| 215 EXPECT_TRUE(QuadF(c3, b3, a3, d3).IsCounterClockwise()); | |
| 216 | |
| 217 // Non-convex quads should work correctly, too. | |
| 218 PointF a4(0, 0); | |
| 219 PointF b4(1, 1); | |
| 220 PointF c4(2, 0); | |
| 221 PointF d4(1, 3); | |
| 222 EXPECT_FALSE(QuadF(a4, b4, c4, d4).IsCounterClockwise()); | |
| 223 EXPECT_FALSE(QuadF(b4, c4, d4, a4).IsCounterClockwise()); | |
| 224 EXPECT_TRUE(QuadF(a4, d4, c4, b4).IsCounterClockwise()); | |
| 225 EXPECT_TRUE(QuadF(c4, b4, a4, d4).IsCounterClockwise()); | |
| 226 | |
| 227 // A quad with huge coordinates should not fail this check due to | |
| 228 // single-precision overflow. | |
| 229 PointF a5(1e30f, 1e30f); | |
| 230 PointF b5(1e35f, 1e30f); | |
| 231 PointF c5(1e35f, 1e35f); | |
| 232 PointF d5(1e30f, 1e35f); | |
| 233 EXPECT_FALSE(QuadF(a5, b5, c5, d5).IsCounterClockwise()); | |
| 234 EXPECT_FALSE(QuadF(b5, c5, d5, a5).IsCounterClockwise()); | |
| 235 EXPECT_TRUE(QuadF(a5, d5, c5, b5).IsCounterClockwise()); | |
| 236 EXPECT_TRUE(QuadF(c5, b5, a5, d5).IsCounterClockwise()); | |
| 237 } | |
| 238 | |
| 239 TEST(QuadTest, BoundingBox) { | |
| 240 RectF r(3.2f, 5.4f, 7.007f, 12.01f); | |
| 241 EXPECT_EQ(r.ToString(), QuadF(r).BoundingBox().ToString()); | |
| 242 | |
| 243 PointF a(1.3f, 1.4f); | |
| 244 PointF b(-0.7f, 4.9f); | |
| 245 PointF c(1.8f, 6.2f); | |
| 246 PointF d(2.1f, 1.6f); | |
| 247 float left = -0.7f; | |
| 248 float top = 1.4f; | |
| 249 float right = 2.1f; | |
| 250 float bottom = 6.2f; | |
| 251 EXPECT_EQ(RectF(left, top, right - left, bottom - top).ToString(), | |
| 252 QuadF(a, b, c, d).BoundingBox().ToString()); | |
| 253 } | |
| 254 | |
| 255 TEST(QuadTest, ContainsPoint) { | |
| 256 PointF a(1.3f, 1.4f); | |
| 257 PointF b(-0.8f, 4.4f); | |
| 258 PointF c(1.8f, 6.1f); | |
| 259 PointF d(2.1f, 1.6f); | |
| 260 | |
| 261 Vector2dF epsilon_x(2 * std::numeric_limits<float>::epsilon(), 0); | |
| 262 Vector2dF epsilon_y(0, 2 * std::numeric_limits<float>::epsilon()); | |
| 263 | |
| 264 Vector2dF ac_center = c - a; | |
| 265 ac_center.Scale(0.5f); | |
| 266 Vector2dF bd_center = d - b; | |
| 267 bd_center.Scale(0.5f); | |
| 268 | |
| 269 EXPECT_TRUE(QuadF(a, b, c, d).Contains(a + ac_center)); | |
| 270 EXPECT_TRUE(QuadF(a, b, c, d).Contains(b + bd_center)); | |
| 271 EXPECT_TRUE(QuadF(a, b, c, d).Contains(c - ac_center)); | |
| 272 EXPECT_TRUE(QuadF(a, b, c, d).Contains(d - bd_center)); | |
| 273 EXPECT_FALSE(QuadF(a, b, c, d).Contains(a - ac_center)); | |
| 274 EXPECT_FALSE(QuadF(a, b, c, d).Contains(b - bd_center)); | |
| 275 EXPECT_FALSE(QuadF(a, b, c, d).Contains(c + ac_center)); | |
| 276 EXPECT_FALSE(QuadF(a, b, c, d).Contains(d + bd_center)); | |
| 277 | |
| 278 EXPECT_TRUE(QuadF(a, b, c, d).Contains(a)); | |
| 279 EXPECT_FALSE(QuadF(a, b, c, d).Contains(a - epsilon_x)); | |
| 280 EXPECT_FALSE(QuadF(a, b, c, d).Contains(a - epsilon_y)); | |
| 281 EXPECT_FALSE(QuadF(a, b, c, d).Contains(a + epsilon_x)); | |
| 282 EXPECT_TRUE(QuadF(a, b, c, d).Contains(a + epsilon_y)); | |
| 283 | |
| 284 EXPECT_TRUE(QuadF(a, b, c, d).Contains(b)); | |
| 285 EXPECT_FALSE(QuadF(a, b, c, d).Contains(b - epsilon_x)); | |
| 286 EXPECT_FALSE(QuadF(a, b, c, d).Contains(b - epsilon_y)); | |
| 287 EXPECT_TRUE(QuadF(a, b, c, d).Contains(b + epsilon_x)); | |
| 288 EXPECT_FALSE(QuadF(a, b, c, d).Contains(b + epsilon_y)); | |
| 289 | |
| 290 EXPECT_TRUE(QuadF(a, b, c, d).Contains(c)); | |
| 291 EXPECT_FALSE(QuadF(a, b, c, d).Contains(c - epsilon_x)); | |
| 292 EXPECT_TRUE(QuadF(a, b, c, d).Contains(c - epsilon_y)); | |
| 293 EXPECT_FALSE(QuadF(a, b, c, d).Contains(c + epsilon_x)); | |
| 294 EXPECT_FALSE(QuadF(a, b, c, d).Contains(c + epsilon_y)); | |
| 295 | |
| 296 EXPECT_TRUE(QuadF(a, b, c, d).Contains(d)); | |
| 297 EXPECT_TRUE(QuadF(a, b, c, d).Contains(d - epsilon_x)); | |
| 298 EXPECT_FALSE(QuadF(a, b, c, d).Contains(d - epsilon_y)); | |
| 299 EXPECT_FALSE(QuadF(a, b, c, d).Contains(d + epsilon_x)); | |
| 300 EXPECT_FALSE(QuadF(a, b, c, d).Contains(d + epsilon_y)); | |
| 301 | |
| 302 // Test a simple square. | |
| 303 PointF s1(-1, -1); | |
| 304 PointF s2(1, -1); | |
| 305 PointF s3(1, 1); | |
| 306 PointF s4(-1, 1); | |
| 307 // Top edge. | |
| 308 EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.1f, -1.0f))); | |
| 309 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, -1.0f))); | |
| 310 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(0.0f, -1.0f))); | |
| 311 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, -1.0f))); | |
| 312 EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.1f, -1.0f))); | |
| 313 // Bottom edge. | |
| 314 EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.1f, 1.0f))); | |
| 315 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, 1.0f))); | |
| 316 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(0.0f, 1.0f))); | |
| 317 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, 1.0f))); | |
| 318 EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.1f, 1.0f))); | |
| 319 // Left edge. | |
| 320 EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, -1.1f))); | |
| 321 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, -1.0f))); | |
| 322 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, 0.0f))); | |
| 323 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, 1.0f))); | |
| 324 EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, 1.1f))); | |
| 325 // Right edge. | |
| 326 EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, -1.1f))); | |
| 327 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, -1.0f))); | |
| 328 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, 0.0f))); | |
| 329 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, 1.0f))); | |
| 330 EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, 1.1f))); | |
| 331 // Centered inside. | |
| 332 EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(0, 0))); | |
| 333 // Centered outside. | |
| 334 EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.1f, 0))); | |
| 335 EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.1f, 0))); | |
| 336 EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(0, -1.1f))); | |
| 337 EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(0, 1.1f))); | |
| 338 } | |
| 339 | |
| 340 TEST(QuadTest, Scale) { | |
| 341 PointF a(1.3f, 1.4f); | |
| 342 PointF b(-0.8f, 4.4f); | |
| 343 PointF c(1.8f, 6.1f); | |
| 344 PointF d(2.1f, 1.6f); | |
| 345 QuadF q1(a, b, c, d); | |
| 346 q1.Scale(1.5f); | |
| 347 | |
| 348 PointF a_scaled = ScalePoint(a, 1.5f); | |
| 349 PointF b_scaled = ScalePoint(b, 1.5f); | |
| 350 PointF c_scaled = ScalePoint(c, 1.5f); | |
| 351 PointF d_scaled = ScalePoint(d, 1.5f); | |
| 352 EXPECT_EQ(q1.ToString(), | |
| 353 QuadF(a_scaled, b_scaled, c_scaled, d_scaled).ToString()); | |
| 354 | |
| 355 QuadF q2; | |
| 356 q2.Scale(1.5f); | |
| 357 EXPECT_EQ(q2.ToString(), q2.ToString()); | |
| 358 } | |
| 359 | |
| 360 } // namespace gfx | |
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Chromium Code Reviews
Issue 109433013:
Move geometric types to a separate, more lightweight target. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src