| Flutter Impeller |

round_rect_unittests.cc
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1 // Copyright 2013 The Flutter 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 "gtest/gtest.h"
6
7 #include "flutter/impeller/geometry/round_rect.h"
8
9 #include "flutter/impeller/geometry/geometry_asserts.h"
10
11 namespace impeller {
12 namespace testing {
13
14 TEST(RoundRectTest, EmptyDeclaration) {
15 RoundRect round_rect;
16
17 EXPECT_TRUE(round_rect.IsEmpty());
18 EXPECT_FALSE(round_rect.IsRect());
19 EXPECT_FALSE(round_rect.IsOval());
20 EXPECT_TRUE(round_rect.IsFinite());
21 EXPECT_TRUE(round_rect.GetBounds().IsEmpty());
22 EXPECT_EQ(round_rect.GetBounds(), Rect());
23 EXPECT_EQ(round_rect.GetBounds().GetLeft(), 0.0f);
24 EXPECT_EQ(round_rect.GetBounds().GetTop(), 0.0f);
25 EXPECT_EQ(round_rect.GetBounds().GetRight(), 0.0f);
26 EXPECT_EQ(round_rect.GetBounds().GetBottom(), 0.0f);
27 EXPECT_EQ(round_rect.GetRadii().top_left, Size());
28 EXPECT_EQ(round_rect.GetRadii().top_right, Size());
29 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size());
30 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size());
31 EXPECT_EQ(round_rect.GetRadii().top_left.width, 0.0f);
32 EXPECT_EQ(round_rect.GetRadii().top_left.height, 0.0f);
33 EXPECT_EQ(round_rect.GetRadii().top_right.width, 0.0f);
34 EXPECT_EQ(round_rect.GetRadii().top_right.height, 0.0f);
35 EXPECT_EQ(round_rect.GetRadii().bottom_left.width, 0.0f);
36 EXPECT_EQ(round_rect.GetRadii().bottom_left.height, 0.0f);
37 EXPECT_EQ(round_rect.GetRadii().bottom_right.width, 0.0f);
38 EXPECT_EQ(round_rect.GetRadii().bottom_right.height, 0.0f);
39 }
40
41 TEST(RoundRectTest, DefaultConstructor) {
42 RoundRect round_rect = RoundRect();
43
44 EXPECT_TRUE(round_rect.IsEmpty());
45 EXPECT_FALSE(round_rect.IsRect());
46 EXPECT_FALSE(round_rect.IsOval());
47 EXPECT_TRUE(round_rect.IsFinite());
48 EXPECT_TRUE(round_rect.GetBounds().IsEmpty());
49 EXPECT_EQ(round_rect.GetBounds(), Rect());
50 EXPECT_EQ(round_rect.GetRadii().top_left, Size());
51 EXPECT_EQ(round_rect.GetRadii().top_right, Size());
52 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size());
53 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size());
54 }
55
56 TEST(RoundRectTest, EmptyRectConstruction) {
57 RoundRect round_rect =
58 RoundRect::MakeRect(Rect::MakeLTRB(20.0f, 20.0f, 20.0f, 20.0f));
59
60 EXPECT_TRUE(round_rect.IsEmpty());
61 EXPECT_FALSE(round_rect.IsRect());
62 EXPECT_FALSE(round_rect.IsOval());
63 EXPECT_TRUE(round_rect.IsFinite());
64 EXPECT_TRUE(round_rect.GetBounds().IsEmpty());
65 EXPECT_EQ(round_rect.GetBounds(), Rect::MakeLTRB(20.0f, 20.0f, 20.0f, 20.0f));
66 EXPECT_EQ(round_rect.GetRadii().top_left, Size());
67 EXPECT_EQ(round_rect.GetRadii().top_right, Size());
68 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size());
69 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size());
70 }
71
72 TEST(RoundRectTest, RectConstructor) {
73 RoundRect round_rect =
74 RoundRect::MakeRect(Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f));
75
76 EXPECT_FALSE(round_rect.IsEmpty());
77 EXPECT_TRUE(round_rect.IsRect());
78 EXPECT_FALSE(round_rect.IsOval());
79 EXPECT_TRUE(round_rect.IsFinite());
80 EXPECT_FALSE(round_rect.GetBounds().IsEmpty());
81 EXPECT_EQ(round_rect.GetBounds(), Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f));
82 EXPECT_EQ(round_rect.GetRadii().top_left, Size());
83 EXPECT_EQ(round_rect.GetRadii().top_right, Size());
84 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size());
85 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size());
86 }
87
88 TEST(RoundRectTest, InvertedRectConstruction) {
89 RoundRect round_rect =
90 RoundRect::MakeRect(Rect::MakeLTRB(20.0f, 20.0f, 10.0f, 10.0f));
91
92 EXPECT_FALSE(round_rect.IsEmpty());
93 EXPECT_TRUE(round_rect.IsRect());
94 EXPECT_FALSE(round_rect.IsOval());
95 EXPECT_TRUE(round_rect.IsFinite());
96 EXPECT_FALSE(round_rect.GetBounds().IsEmpty());
97 EXPECT_EQ(round_rect.GetBounds(), Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f));
98 EXPECT_EQ(round_rect.GetRadii().top_left, Size());
99 EXPECT_EQ(round_rect.GetRadii().top_right, Size());
100 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size());
101 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size());
102 }
103
104 TEST(RoundRectTest, EmptyOvalConstruction) {
105 RoundRect round_rect = RoundRect::MakeRectXY(
106 Rect::MakeLTRB(20.0f, 20.0f, 20.0f, 20.0f), 10.0f, 10.0f);
107
108 EXPECT_TRUE(round_rect.IsEmpty());
109 EXPECT_FALSE(round_rect.IsRect());
110 EXPECT_FALSE(round_rect.IsOval());
111 EXPECT_TRUE(round_rect.IsFinite());
112 EXPECT_TRUE(round_rect.GetBounds().IsEmpty());
113 EXPECT_EQ(round_rect.GetBounds(), Rect::MakeLTRB(20.0f, 20.0f, 20.0f, 20.0f));
114 EXPECT_EQ(round_rect.GetRadii().top_left, Size());
115 EXPECT_EQ(round_rect.GetRadii().top_right, Size());
116 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size());
117 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size());
118 }
119
120 TEST(RoundRectTest, OvalConstructor) {
121 RoundRect round_rect =
122 RoundRect::MakeOval(Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f));
123
124 EXPECT_FALSE(round_rect.IsEmpty());
125 EXPECT_FALSE(round_rect.IsRect());
126 EXPECT_TRUE(round_rect.IsOval());
127 EXPECT_TRUE(round_rect.IsFinite());
128 EXPECT_FALSE(round_rect.GetBounds().IsEmpty());
129 EXPECT_EQ(round_rect.GetBounds(), Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f));
130 EXPECT_EQ(round_rect.GetRadii().top_left, Size(5.0f, 5.0f));
131 EXPECT_EQ(round_rect.GetRadii().top_right, Size(5.0f, 5.0f));
132 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size(5.0f, 5.0f));
133 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size(5.0f, 5.0f));
134 }
135
136 TEST(RoundRectTest, InvertedOvalConstruction) {
137 RoundRect round_rect = RoundRect::MakeRectXY(
138 Rect::MakeLTRB(20.0f, 20.0f, 10.0f, 10.0f), 10.0f, 10.0f);
139
140 EXPECT_FALSE(round_rect.IsEmpty());
141 EXPECT_FALSE(round_rect.IsRect());
142 EXPECT_TRUE(round_rect.IsOval());
143 EXPECT_TRUE(round_rect.IsFinite());
144 EXPECT_FALSE(round_rect.GetBounds().IsEmpty());
145 EXPECT_EQ(round_rect.GetBounds(), Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f));
146 EXPECT_EQ(round_rect.GetRadii().top_left, Size(5.0f, 5.0f));
147 EXPECT_EQ(round_rect.GetRadii().top_right, Size(5.0f, 5.0f));
148 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size(5.0f, 5.0f));
149 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size(5.0f, 5.0f));
150 }
151
152 TEST(RoundRectTest, RectRadiusConstructor) {
153 RoundRect round_rect = RoundRect::MakeRectRadius(
154 Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f), 2.0f);
155
156 EXPECT_FALSE(round_rect.IsEmpty());
157 EXPECT_FALSE(round_rect.IsRect());
158 EXPECT_FALSE(round_rect.IsOval());
159 EXPECT_TRUE(round_rect.IsFinite());
160 EXPECT_FALSE(round_rect.GetBounds().IsEmpty());
161 EXPECT_EQ(round_rect.GetBounds(), Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f));
162 EXPECT_EQ(round_rect.GetRadii().top_left, Size(2.0f, 2.0f));
163 EXPECT_EQ(round_rect.GetRadii().top_right, Size(2.0f, 2.0f));
164 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size(2.0f, 2.0f));
165 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size(2.0f, 2.0f));
166 }
167
168 TEST(RoundRectTest, RectXYConstructor) {
169 RoundRect round_rect = RoundRect::MakeRectXY(
170 Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f), 2.0f, 3.0f);
171
172 EXPECT_FALSE(round_rect.IsEmpty());
173 EXPECT_FALSE(round_rect.IsRect());
174 EXPECT_FALSE(round_rect.IsOval());
175 EXPECT_TRUE(round_rect.IsFinite());
176 EXPECT_FALSE(round_rect.GetBounds().IsEmpty());
177 EXPECT_EQ(round_rect.GetBounds(), Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f));
178 EXPECT_EQ(round_rect.GetRadii().top_left, Size(2.0f, 3.0f));
179 EXPECT_EQ(round_rect.GetRadii().top_right, Size(2.0f, 3.0f));
180 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size(2.0f, 3.0f));
181 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size(2.0f, 3.0f));
182 }
183
184 TEST(RoundRectTest, RectSizeConstructor) {
185 RoundRect round_rect = RoundRect::MakeRectXY(
186 Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f), Size(2.0f, 3.0f));
187
188 EXPECT_FALSE(round_rect.IsEmpty());
189 EXPECT_FALSE(round_rect.IsRect());
190 EXPECT_FALSE(round_rect.IsOval());
191 EXPECT_TRUE(round_rect.IsFinite());
192 EXPECT_FALSE(round_rect.GetBounds().IsEmpty());
193 EXPECT_EQ(round_rect.GetBounds(), Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f));
194 EXPECT_EQ(round_rect.GetRadii().top_left, Size(2.0f, 3.0f));
195 EXPECT_EQ(round_rect.GetRadii().top_right, Size(2.0f, 3.0f));
196 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size(2.0f, 3.0f));
197 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size(2.0f, 3.0f));
198 }
199
200 TEST(RoundRectTest, RectRadiiConstructor) {
201 RoundRect round_rect =
202 RoundRect::MakeRectRadii(Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f),
203 {
204 .top_left = Size(1.0, 1.5),
205 .top_right = Size(2.0, 2.5f),
206 .bottom_left = Size(3.0, 3.5f),
207 .bottom_right = Size(4.0, 4.5f),
208 });
209
210 EXPECT_FALSE(round_rect.IsEmpty());
211 EXPECT_FALSE(round_rect.IsRect());
212 EXPECT_FALSE(round_rect.IsOval());
213 EXPECT_TRUE(round_rect.IsFinite());
214 EXPECT_FALSE(round_rect.GetBounds().IsEmpty());
215 EXPECT_EQ(round_rect.GetBounds(), Rect::MakeLTRB(10.0f, 10.0f, 20.0f, 20.0f));
216 EXPECT_EQ(round_rect.GetRadii().top_left, Size(1.0f, 1.5f));
217 EXPECT_EQ(round_rect.GetRadii().top_right, Size(2.0f, 2.5f));
218 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size(3.0f, 3.5f));
219 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size(4.0f, 4.5f));
220 }
221
222 TEST(RoundRectTest, RectRadiiOverflowWidthConstructor) {
223 RoundRect round_rect =
224 RoundRect::MakeRectRadii(Rect::MakeXYWH(10.0f, 10.0f, 6.0f, 30.0f),
225 {
226 .top_left = Size(1.0f, 2.0f),
227 .top_right = Size(3.0f, 4.0f),
228 .bottom_left = Size(5.0f, 6.0f),
229 .bottom_right = Size(7.0f, 8.0f),
230 });
231 // Largest sum of paired radii widths is the bottom edge which sums to 12
232 // Rect is only 6 wide so all radii are scaled by half
233 // Rect is 30 tall so no scaling should happen due to radii heights
234
235 EXPECT_FALSE(round_rect.IsEmpty());
236 EXPECT_FALSE(round_rect.IsRect());
237 EXPECT_FALSE(round_rect.IsOval());
238 EXPECT_TRUE(round_rect.IsFinite());
239 EXPECT_FALSE(round_rect.GetBounds().IsEmpty());
240 EXPECT_EQ(round_rect.GetBounds(), Rect::MakeLTRB(10.0f, 10.0f, 16.0f, 40.0f));
241 EXPECT_EQ(round_rect.GetRadii().top_left, Size(0.5f, 1.0f));
242 EXPECT_EQ(round_rect.GetRadii().top_right, Size(1.5f, 2.0f));
243 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size(2.5f, 3.0f));
244 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size(3.5f, 4.0f));
245 }
246
247 TEST(RoundRectTest, RectRadiiOverflowHeightConstructor) {
248 RoundRect round_rect =
249 RoundRect::MakeRectRadii(Rect::MakeXYWH(10.0f, 10.0f, 30.0f, 6.0f),
250 {
251 .top_left = Size(1.0f, 2.0f),
252 .top_right = Size(3.0f, 4.0f),
253 .bottom_left = Size(5.0f, 6.0f),
254 .bottom_right = Size(7.0f, 8.0f),
255 });
256 // Largest sum of paired radii heights is the right edge which sums to 12
257 // Rect is only 6 tall so all radii are scaled by half
258 // Rect is 30 wide so no scaling should happen due to radii widths
259
260 EXPECT_FALSE(round_rect.IsEmpty());
261 EXPECT_FALSE(round_rect.IsRect());
262 EXPECT_FALSE(round_rect.IsOval());
263 EXPECT_TRUE(round_rect.IsFinite());
264 EXPECT_FALSE(round_rect.GetBounds().IsEmpty());
265 EXPECT_EQ(round_rect.GetBounds(), Rect::MakeLTRB(10.0f, 10.0f, 40.0f, 16.0f));
266 EXPECT_EQ(round_rect.GetRadii().top_left, Size(0.5f, 1.0f));
267 EXPECT_EQ(round_rect.GetRadii().top_right, Size(1.5f, 2.0f));
268 EXPECT_EQ(round_rect.GetRadii().bottom_left, Size(2.5f, 3.0f));
269 EXPECT_EQ(round_rect.GetRadii().bottom_right, Size(3.5f, 4.0f));
270 }
271
272 TEST(RoundRectTest, Shift) {
273 RoundRect round_rect =
274 RoundRect::MakeRectRadii(Rect::MakeXYWH(10.0f, 10.0f, 30.0f, 30.0f),
275 {
276 .top_left = Size(1.0f, 2.0f),
277 .top_right = Size(3.0f, 4.0f),
278 .bottom_left = Size(5.0f, 6.0f),
279 .bottom_right = Size(7.0f, 8.0f),
280 });
281 RoundRect shifted = round_rect.Shift(5.0, 6.0);
282
283 EXPECT_FALSE(shifted.IsEmpty());
284 EXPECT_FALSE(shifted.IsRect());
285 EXPECT_FALSE(shifted.IsOval());
286 EXPECT_TRUE(shifted.IsFinite());
287 EXPECT_FALSE(shifted.GetBounds().IsEmpty());
288 EXPECT_EQ(shifted.GetBounds(), Rect::MakeLTRB(15.0f, 16.0f, 45.0f, 46.0f));
289 EXPECT_EQ(shifted.GetRadii().top_left, Size(1.0f, 2.0f));
290 EXPECT_EQ(shifted.GetRadii().top_right, Size(3.0f, 4.0f));
291 EXPECT_EQ(shifted.GetRadii().bottom_left, Size(5.0f, 6.0f));
292 EXPECT_EQ(shifted.GetRadii().bottom_right, Size(7.0f, 8.0f));
293
294 EXPECT_EQ(shifted,
295 RoundRect::MakeRectRadii(Rect::MakeXYWH(15.0f, 16.0f, 30.0f, 30.0f),
296 {
297 .top_left = Size(1.0f, 2.0f),
298 .top_right = Size(3.0f, 4.0f),
299 .bottom_left = Size(5.0f, 6.0f),
300 .bottom_right = Size(7.0f, 8.0f),
301 }));
302 }
303
304 TEST(RoundRectTest, ExpandScalar) {
305 RoundRect round_rect =
306 RoundRect::MakeRectRadii(Rect::MakeXYWH(10.0f, 10.0f, 30.0f, 30.0f),
307 {
308 .top_left = Size(1.0f, 2.0f),
309 .top_right = Size(3.0f, 4.0f),
310 .bottom_left = Size(5.0f, 6.0f),
311 .bottom_right = Size(7.0f, 8.0f),
312 });
313 RoundRect expanded = round_rect.Expand(5.0);
314
315 EXPECT_FALSE(expanded.IsEmpty());
316 EXPECT_FALSE(expanded.IsRect());
317 EXPECT_FALSE(expanded.IsOval());
318 EXPECT_TRUE(expanded.IsFinite());
319 EXPECT_FALSE(expanded.GetBounds().IsEmpty());
320 EXPECT_EQ(expanded.GetBounds(), Rect::MakeLTRB(5.0f, 5.0f, 45.0f, 45.0f));
321 EXPECT_EQ(expanded.GetRadii().top_left, Size(1.0f, 2.0f));
322 EXPECT_EQ(expanded.GetRadii().top_right, Size(3.0f, 4.0f));
323 EXPECT_EQ(expanded.GetRadii().bottom_left, Size(5.0f, 6.0f));
324 EXPECT_EQ(expanded.GetRadii().bottom_right, Size(7.0f, 8.0f));
325
326 EXPECT_EQ(expanded,
327 RoundRect::MakeRectRadii(Rect::MakeXYWH(5.0f, 5.0f, 40.0f, 40.0f),
328 {
329 .top_left = Size(1.0f, 2.0f),
330 .top_right = Size(3.0f, 4.0f),
331 .bottom_left = Size(5.0f, 6.0f),
332 .bottom_right = Size(7.0f, 8.0f),
333 }));
334 }
335
336 TEST(RoundRectTest, ExpandTwoScalars) {
337 RoundRect round_rect =
338 RoundRect::MakeRectRadii(Rect::MakeXYWH(10.0f, 10.0f, 30.0f, 30.0f),
339 {
340 .top_left = Size(1.0f, 2.0f),
341 .top_right = Size(3.0f, 4.0f),
342 .bottom_left = Size(5.0f, 6.0f),
343 .bottom_right = Size(7.0f, 8.0f),
344 });
345 RoundRect expanded = round_rect.Expand(5.0, 6.0);
346
347 EXPECT_FALSE(expanded.IsEmpty());
348 EXPECT_FALSE(expanded.IsRect());
349 EXPECT_FALSE(expanded.IsOval());
350 EXPECT_TRUE(expanded.IsFinite());
351 EXPECT_FALSE(expanded.GetBounds().IsEmpty());
352 EXPECT_EQ(expanded.GetBounds(), Rect::MakeLTRB(5.0f, 4.0f, 45.0f, 46.0f));
353 EXPECT_EQ(expanded.GetRadii().top_left, Size(1.0f, 2.0f));
354 EXPECT_EQ(expanded.GetRadii().top_right, Size(3.0f, 4.0f));
355 EXPECT_EQ(expanded.GetRadii().bottom_left, Size(5.0f, 6.0f));
356 EXPECT_EQ(expanded.GetRadii().bottom_right, Size(7.0f, 8.0f));
357
358 EXPECT_EQ(expanded,
359 RoundRect::MakeRectRadii(Rect::MakeXYWH(5.0f, 4.0f, 40.0f, 42.0f),
360 {
361 .top_left = Size(1.0f, 2.0f),
362 .top_right = Size(3.0f, 4.0f),
363 .bottom_left = Size(5.0f, 6.0f),
364 .bottom_right = Size(7.0f, 8.0f),
365 }));
366 }
367
368 TEST(RoundRectTest, ExpandFourScalars) {
369 RoundRect round_rect =
370 RoundRect::MakeRectRadii(Rect::MakeXYWH(10.0f, 10.0f, 30.0f, 30.0f),
371 {
372 .top_left = Size(1.0f, 2.0f),
373 .top_right = Size(3.0f, 4.0f),
374 .bottom_left = Size(5.0f, 6.0f),
375 .bottom_right = Size(7.0f, 8.0f),
376 });
377 RoundRect expanded = round_rect.Expand(5.0, 6.0, 7.0, 8.0);
378
379 EXPECT_FALSE(expanded.IsEmpty());
380 EXPECT_FALSE(expanded.IsRect());
381 EXPECT_FALSE(expanded.IsOval());
382 EXPECT_TRUE(expanded.IsFinite());
383 EXPECT_FALSE(expanded.GetBounds().IsEmpty());
384 EXPECT_EQ(expanded.GetBounds(), Rect::MakeLTRB(5.0f, 4.0f, 47.0f, 48.0f));
385 EXPECT_EQ(expanded.GetRadii().top_left, Size(1.0f, 2.0f));
386 EXPECT_EQ(expanded.GetRadii().top_right, Size(3.0f, 4.0f));
387 EXPECT_EQ(expanded.GetRadii().bottom_left, Size(5.0f, 6.0f));
388 EXPECT_EQ(expanded.GetRadii().bottom_right, Size(7.0f, 8.0f));
389
390 EXPECT_EQ(expanded,
391 RoundRect::MakeRectRadii(Rect::MakeXYWH(5.0f, 4.0f, 42.0f, 44.0f),
392 {
393 .top_left = Size(1.0f, 2.0f),
394 .top_right = Size(3.0f, 4.0f),
395 .bottom_left = Size(5.0f, 6.0f),
396 .bottom_right = Size(7.0f, 8.0f),
397 }));
398 }
399
400 TEST(RoundRectTest, ContractScalar) {
401 RoundRect round_rect =
402 RoundRect::MakeRectRadii(Rect::MakeXYWH(10.0f, 10.0f, 30.0f, 30.0f),
403 {
404 .top_left = Size(1.0f, 2.0f),
405 .top_right = Size(3.0f, 4.0f),
406 .bottom_left = Size(5.0f, 6.0f),
407 .bottom_right = Size(7.0f, 8.0f),
408 });
409 RoundRect expanded = round_rect.Expand(-2.0);
410
411 EXPECT_FALSE(expanded.IsEmpty());
412 EXPECT_FALSE(expanded.IsRect());
413 EXPECT_FALSE(expanded.IsOval());
414 EXPECT_TRUE(expanded.IsFinite());
415 EXPECT_FALSE(expanded.GetBounds().IsEmpty());
416 EXPECT_EQ(expanded.GetBounds(), Rect::MakeLTRB(12.0f, 12.0f, 38.0f, 38.0f));
417 EXPECT_EQ(expanded.GetRadii().top_left, Size(1.0f, 2.0f));
418 EXPECT_EQ(expanded.GetRadii().top_right, Size(3.0f, 4.0f));
419 EXPECT_EQ(expanded.GetRadii().bottom_left, Size(5.0f, 6.0f));
420 EXPECT_EQ(expanded.GetRadii().bottom_right, Size(7.0f, 8.0f));
421
422 EXPECT_EQ(expanded,
423 RoundRect::MakeRectRadii(Rect::MakeXYWH(12.0f, 12.0f, 26.0f, 26.0f),
424 {
425 .top_left = Size(1.0f, 2.0f),
426 .top_right = Size(3.0f, 4.0f),
427 .bottom_left = Size(5.0f, 6.0f),
428 .bottom_right = Size(7.0f, 8.0f),
429 }));
430 }
431
432 TEST(RoundRectTest, ContractTwoScalars) {
433 RoundRect round_rect =
434 RoundRect::MakeRectRadii(Rect::MakeXYWH(10.0f, 10.0f, 30.0f, 30.0f),
435 {
436 .top_left = Size(1.0f, 2.0f),
437 .top_right = Size(3.0f, 4.0f),
438 .bottom_left = Size(5.0f, 6.0f),
439 .bottom_right = Size(7.0f, 8.0f),
440 });
441 RoundRect expanded = round_rect.Expand(-1.0, -2.0);
442
443 EXPECT_FALSE(expanded.IsEmpty());
444 EXPECT_FALSE(expanded.IsRect());
445 EXPECT_FALSE(expanded.IsOval());
446 EXPECT_TRUE(expanded.IsFinite());
447 EXPECT_FALSE(expanded.GetBounds().IsEmpty());
448 EXPECT_EQ(expanded.GetBounds(), Rect::MakeLTRB(11.0f, 12.0f, 39.0f, 38.0f));
449 EXPECT_EQ(expanded.GetRadii().top_left, Size(1.0f, 2.0f));
450 EXPECT_EQ(expanded.GetRadii().top_right, Size(3.0f, 4.0f));
451 EXPECT_EQ(expanded.GetRadii().bottom_left, Size(5.0f, 6.0f));
452 EXPECT_EQ(expanded.GetRadii().bottom_right, Size(7.0f, 8.0f));
453
454 EXPECT_EQ(expanded,
455 RoundRect::MakeRectRadii(Rect::MakeXYWH(11.0f, 12.0f, 28.0f, 26.0f),
456 {
457 .top_left = Size(1.0f, 2.0f),
458 .top_right = Size(3.0f, 4.0f),
459 .bottom_left = Size(5.0f, 6.0f),
460 .bottom_right = Size(7.0f, 8.0f),
461 }));
462 }
463
464 TEST(RoundRectTest, ContractFourScalars) {
465 RoundRect round_rect =
466 RoundRect::MakeRectRadii(Rect::MakeXYWH(10.0f, 10.0f, 30.0f, 30.0f),
467 {
468 .top_left = Size(1.0f, 2.0f),
469 .top_right = Size(3.0f, 4.0f),
470 .bottom_left = Size(5.0f, 6.0f),
471 .bottom_right = Size(7.0f, 8.0f),
472 });
473 RoundRect expanded = round_rect.Expand(-1.0, -1.5, -2.0, -2.5);
474
475 EXPECT_FALSE(expanded.IsEmpty());
476 EXPECT_FALSE(expanded.IsRect());
477 EXPECT_FALSE(expanded.IsOval());
478 EXPECT_TRUE(expanded.IsFinite());
479 EXPECT_FALSE(expanded.GetBounds().IsEmpty());
480 EXPECT_EQ(expanded.GetBounds(), Rect::MakeLTRB(11.0f, 11.5f, 38.0f, 37.5f));
481 EXPECT_EQ(expanded.GetRadii().top_left, Size(1.0f, 2.0f));
482 EXPECT_EQ(expanded.GetRadii().top_right, Size(3.0f, 4.0f));
483 EXPECT_EQ(expanded.GetRadii().bottom_left, Size(5.0f, 6.0f));
484 EXPECT_EQ(expanded.GetRadii().bottom_right, Size(7.0f, 8.0f));
485
486 EXPECT_EQ(expanded,
487 RoundRect::MakeRectRadii(Rect::MakeXYWH(11.0f, 11.5f, 27.0f, 26.0f),
488 {
489 .top_left = Size(1.0f, 2.0f),
490 .top_right = Size(3.0f, 4.0f),
491 .bottom_left = Size(5.0f, 6.0f),
492 .bottom_right = Size(7.0f, 8.0f),
493 }));
494 }
495
496 TEST(RoundRectTest, ContractAndRequireRadiiAdjustment) {
497 RoundRect round_rect =
498 RoundRect::MakeRectRadii(Rect::MakeXYWH(10.0f, 10.0f, 30.0f, 30.0f),
499 {
500 .top_left = Size(1.0f, 2.0f),
501 .top_right = Size(3.0f, 4.0f),
502 .bottom_left = Size(5.0f, 6.0f),
503 .bottom_right = Size(7.0f, 8.0f),
504 });
505 RoundRect expanded = round_rect.Expand(-12.0);
506 // Largest sum of paired radii sizes are the bottom and right edges
507 // both of which sum to 12
508 // Rect was 30x30 reduced by 12 on all sides leaving only 6x6, so all
509 // radii are scaled by half to avoid overflowing the contracted rect
510
511 EXPECT_FALSE(expanded.IsEmpty());
512 EXPECT_FALSE(expanded.IsRect());
513 EXPECT_FALSE(expanded.IsOval());
514 EXPECT_TRUE(expanded.IsFinite());
515 EXPECT_FALSE(expanded.GetBounds().IsEmpty());
516 EXPECT_EQ(expanded.GetBounds(), Rect::MakeLTRB(22.0f, 22.0f, 28.0f, 28.0f));
517 EXPECT_EQ(expanded.GetRadii().top_left, Size(0.5f, 1.0f));
518 EXPECT_EQ(expanded.GetRadii().top_right, Size(1.5f, 2.0f));
519 EXPECT_EQ(expanded.GetRadii().bottom_left, Size(2.5f, 3.0f));
520 EXPECT_EQ(expanded.GetRadii().bottom_right, Size(3.5f, 4.0f));
521
522 // In this test, the MakeRectRadii constructor will make the same
523 // adjustment to the radii that the Expand method applied.
524 EXPECT_EQ(expanded,
525 RoundRect::MakeRectRadii(Rect::MakeXYWH(22.0f, 22.0f, 6.0f, 6.0f),
526 {
527 .top_left = Size(1.0f, 2.0f),
528 .top_right = Size(3.0f, 4.0f),
529 .bottom_left = Size(5.0f, 6.0f),
530 .bottom_right = Size(7.0f, 8.0f),
531 }));
532
533 // In this test, the arguments to the constructor supply the correctly
534 // adjusted radii (though there is no real way to tell other than
535 // the result is the same).
536 EXPECT_EQ(expanded,
537 RoundRect::MakeRectRadii(Rect::MakeXYWH(22.0f, 22.0f, 6.0f, 6.0f),
538 {
539 .top_left = Size(0.5f, 1.0f),
540 .top_right = Size(1.5f, 2.0f),
541 .bottom_left = Size(2.5f, 3.0f),
542 .bottom_right = Size(3.5f, 4.0f),
543 }));
544 }
545
546 TEST(RoundRectTest, NoCornerRoundRectContains) {
547 Rect bounds = Rect::MakeLTRB(-50.0f, -50.0f, 50.0f, 50.0f);
548 // RRect of bounds with no corners contains corners just barely
549 auto no_corners = RoundRect::MakeRectXY(bounds, 0.0f, 0.0f);
550
551 EXPECT_TRUE(no_corners.Contains({-50, -50}));
552 // Rectangles have half-in, half-out containment so we need
553 // to be careful about testing containment of right/bottom corners.
554 EXPECT_TRUE(no_corners.Contains({-50, 49.99}));
555 EXPECT_TRUE(no_corners.Contains({49.99, -50}));
556 EXPECT_TRUE(no_corners.Contains({49.99, 49.99}));
557 EXPECT_FALSE(no_corners.Contains({-50.01, -50}));
558 EXPECT_FALSE(no_corners.Contains({-50, -50.01}));
559 EXPECT_FALSE(no_corners.Contains({-50.01, 50}));
560 EXPECT_FALSE(no_corners.Contains({-50, 50.01}));
561 EXPECT_FALSE(no_corners.Contains({50.01, -50}));
562 EXPECT_FALSE(no_corners.Contains({50, -50.01}));
563 EXPECT_FALSE(no_corners.Contains({50.01, 50}));
564 EXPECT_FALSE(no_corners.Contains({50, 50.01}));
565 }
566
567 TEST(RoundRectTest, TinyCornerRoundRectContains) {
568 Rect bounds = Rect::MakeLTRB(-50.0f, -50.0f, 50.0f, 50.0f);
569 // RRect of bounds with even the tiniest corners does not contain corners
570 auto tiny_corners = RoundRect::MakeRectXY(bounds, 0.01f, 0.01f);
571
572 EXPECT_FALSE(tiny_corners.Contains({-50, -50}));
573 EXPECT_FALSE(tiny_corners.Contains({-50, 50}));
574 EXPECT_FALSE(tiny_corners.Contains({50, -50}));
575 EXPECT_FALSE(tiny_corners.Contains({50, 50}));
576 }
577
578 TEST(RoundRectTest, UniformCircularRoundRectContains) {
579 Rect bounds = Rect::MakeLTRB(-50.0f, -50.0f, 50.0f, 50.0f);
580 auto expanded_2_r_2 = RoundRect::MakeRectXY(bounds.Expand(2.0), 2.0f, 2.0f);
581
582 // Expanded by 2.0 and then with a corner of 2.0 obviously still
583 // contains the corners
584 EXPECT_TRUE(expanded_2_r_2.Contains({-50, -50}));
585 EXPECT_TRUE(expanded_2_r_2.Contains({-50, 50}));
586 EXPECT_TRUE(expanded_2_r_2.Contains({50, -50}));
587 EXPECT_TRUE(expanded_2_r_2.Contains({50, 50}));
588
589 // Now we try to box in the corner containment to exactly where the
590 // rounded corner of the expanded round rect with radii of 2.0 lies.
591 // The 45-degree diagonal point of a circle of radius 2.0 lies at:
592 //
593 // (2 * sqrt(2) / 2, 2 * sqrt(2) / 2)
594 // (sqrt(2), sqrt(2))
595 //
596 // So we test +/- (50 + sqrt(2) +/- epsilon)
597 const auto coord_out = 50 + kSqrt2 + kEhCloseEnough;
598 const auto coord_in = 50 + kSqrt2 - kEhCloseEnough;
599 // Upper left corner
600 EXPECT_TRUE(expanded_2_r_2.Contains({-coord_in, -coord_in}));
601 EXPECT_FALSE(expanded_2_r_2.Contains({-coord_out, -coord_out}));
602 // Upper right corner
603 EXPECT_TRUE(expanded_2_r_2.Contains({coord_in, -coord_in}));
604 EXPECT_FALSE(expanded_2_r_2.Contains({coord_out, -coord_out}));
605 // Lower left corner
606 EXPECT_TRUE(expanded_2_r_2.Contains({-coord_in, coord_in}));
607 EXPECT_FALSE(expanded_2_r_2.Contains({-coord_out, coord_out}));
608 // Lower right corner
609 EXPECT_TRUE(expanded_2_r_2.Contains({coord_in, coord_in}));
610 EXPECT_FALSE(expanded_2_r_2.Contains({coord_out, coord_out}));
611 }
612
613 TEST(RoundRectTest, UniformEllipticalRoundRectContains) {
614 Rect bounds = Rect::MakeLTRB(-50.0f, -50.0f, 50.0f, 50.0f);
615 auto expanded_2_r_2 = RoundRect::MakeRectXY(bounds.Expand(2.0), 2.0f, 3.0f);
616
617 // Expanded by 2.0 and then with a corner of 2x3 should still
618 // contain the corners
619 EXPECT_TRUE(expanded_2_r_2.Contains({-50, -50}));
620 EXPECT_TRUE(expanded_2_r_2.Contains({-50, 50}));
621 EXPECT_TRUE(expanded_2_r_2.Contains({50, -50}));
622 EXPECT_TRUE(expanded_2_r_2.Contains({50, 50}));
623
624 // Now we try to box in the corner containment to exactly where the
625 // rounded corner of the expanded round rect with radii of 2x3 lies.
626 // The "45-degree diagonal point" of an ellipse of radii 2x3 lies at:
627 //
628 // (2 * sqrt(2) / 2, 3 * sqrt(2) / 2)
629 // (sqrt(2), 3 * sqrt(2) / 2)
630 //
631 // And the center(s) of these corners are at:
632 // (+/-(50 + 2 - 2), +/-(50 + 2 - 3))
633 // = (+/-50, +/-49)
634 const auto x_coord_out = 50 + kSqrt2 + kEhCloseEnough;
635 const auto x_coord_in = 50 + kSqrt2 - kEhCloseEnough;
636 const auto y_coord_out = 49 + 3 * kSqrt2 / 2 + kEhCloseEnough;
637 const auto y_coord_in = 49 + 3 * kSqrt2 / 2 - kEhCloseEnough;
638 // Upper left corner
639 EXPECT_TRUE(expanded_2_r_2.Contains({-x_coord_in, -y_coord_in}));
640 EXPECT_FALSE(expanded_2_r_2.Contains({-x_coord_out, -y_coord_out}));
641 // Upper right corner
642 EXPECT_TRUE(expanded_2_r_2.Contains({x_coord_in, -y_coord_in}));
643 EXPECT_FALSE(expanded_2_r_2.Contains({x_coord_out, -y_coord_out}));
644 // Lower left corner
645 EXPECT_TRUE(expanded_2_r_2.Contains({-x_coord_in, y_coord_in}));
646 EXPECT_FALSE(expanded_2_r_2.Contains({-x_coord_out, y_coord_out}));
647 // Lower right corner
648 EXPECT_TRUE(expanded_2_r_2.Contains({x_coord_in, y_coord_in}));
649 EXPECT_FALSE(expanded_2_r_2.Contains({x_coord_out, y_coord_out}));
650 }
651
652 TEST(RoundRectTest, DifferingCornersRoundRectContains) {
653 Rect bounds = Rect::MakeLTRB(-50.0f, -50.0f, 50.0f, 50.0f);
654 auto round_rect =
655 RoundRect::MakeRectRadii(bounds, {
656 .top_left = Size(2.0, 3.0),
657 .top_right = Size(4.0, 5.0),
658 .bottom_left = Size(6.0, 7.0),
659 .bottom_right = Size(8.0, 9.0),
660 });
661
662 // For a corner with radii {A, B}, the "45 degree point" on the
663 // corner curve will be at an offset of:
664 //
665 // (A * sqrt(2) / 2, B * sqrt(2) / 2)
666 //
667 // And the center(s) of these corners are at:
668 //
669 // (+/-(50 - A), +/-(50 - B))
670 auto coord = [](Scalar radius) {
671 return 50 - radius + radius * kSqrt2 / 2.0f - kEhCloseEnough;
672 };
673 auto coord_in = [&coord](Scalar radius) {
674 return coord(radius) - kEhCloseEnough;
675 };
676 auto coord_out = [&coord](Scalar radius) {
677 // For some reason 1 kEhCloseEnough is not enough to put us outside
678 // in some of the cases, so we use 2x the epsilon.
679 return coord(radius) + 2 * kEhCloseEnough;
680 };
681 // Upper left corner (radii = {2.0, 3.0})
682 EXPECT_TRUE(round_rect.Contains({-coord_in(2.0), -coord_in(3.0)}));
683 EXPECT_FALSE(round_rect.Contains({-coord_out(2.0), -coord_out(3.0)}));
684 // Upper right corner (radii = {4.0, 5.0})
685 EXPECT_TRUE(round_rect.Contains({coord_in(4.0), -coord_in(5.0)}));
686 EXPECT_FALSE(round_rect.Contains({coord_out(4.0), -coord_out(5.0)}));
687 // Lower left corner (radii = {6.0, 7.0})
688 EXPECT_TRUE(round_rect.Contains({-coord_in(6.0), coord_in(7.0)}));
689 EXPECT_FALSE(round_rect.Contains({-coord_out(6.0), coord_out(7.0)}));
690 // Lower right corner (radii = {8.0, 9.0})
691 EXPECT_TRUE(round_rect.Contains({coord_in(8.0), coord_in(9.0)}));
692 EXPECT_FALSE(round_rect.Contains({coord_out(8.0), coord_out(9.0)}));
693 }
694
695 } // namespace testing
696 } // namespace impeller
geometry_asserts.h
impeller::testing::TEST
TEST(AllocationSizeTest, CanCreateTypedAllocations)
Definition: allocation_size_unittests.cc:10
impeller
Definition: allocation.cc:12
impeller::Scalar
float Scalar
Definition: scalar.h:19
impeller::kEhCloseEnough
constexpr float kEhCloseEnough
Definition: constants.h:57
impeller::Size
TSize< Scalar > Size
Definition: size.h:159
impeller::kSqrt2
constexpr float kSqrt2
Definition: constants.h:47
round_rect.h
impeller::RoundRect
Definition: round_rect.h:16
impeller::RoundRect::IsFinite
constexpr bool IsFinite() const
Definition: round_rect.h:57
impeller::RoundRect::MakeRectRadius
static RoundRect MakeRectRadius(const Rect &rect, Scalar radius)
Definition: round_rect.h:27
impeller::RoundRect::GetRadii
constexpr const RoundingRadii & GetRadii() const
Definition: round_rect.h:55
impeller::RoundRect::MakeRectRadii
static RoundRect MakeRectRadii(const Rect &rect, const RoundingRadii &radii)
Definition: round_rect.cc:9
impeller::RoundRect::IsEmpty
constexpr bool IsEmpty() const
Definition: round_rect.h:65
impeller::RoundRect::MakeOval
static RoundRect MakeOval(const Rect &rect)
Definition: round_rect.h:23
impeller::RoundRect::MakeRectXY
static RoundRect MakeRectXY(const Rect &rect, Scalar x_radius, Scalar y_radius)
Definition: round_rect.h:31
impeller::RoundRect::IsRect
constexpr bool IsRect() const
Definition: round_rect.h:67
impeller::RoundRect::Expand
RoundRect Expand(Scalar left, Scalar top, Scalar right, Scalar bottom) const
Returns a round rectangle with expanded edges. Negative expansion results in shrinking.
Definition: round_rect.h:98
impeller::RoundRect::GetBounds
constexpr const Rect & GetBounds() const
Definition: round_rect.h:53
impeller::RoundRect::IsOval
constexpr bool IsOval() const
Definition: round_rect.h:71
impeller::RoundRect::MakeRect
static RoundRect MakeRect(const Rect &rect)
Definition: round_rect.h:19
impeller::RoundRect::Shift
RoundRect Shift(Scalar dx, Scalar dy) const
Returns a new round rectangle translated by the given offset.
Definition: round_rect.h:89
impeller::RoundingRadii::top_right
Size top_right
Definition: rounding_radii.h:16
impeller::RoundingRadii::bottom_left
Size bottom_left
Definition: rounding_radii.h:17
impeller::RoundingRadii::bottom_right
Size bottom_right
Definition: rounding_radii.h:18
impeller::RoundingRadii::top_left
Size top_left
Definition: rounding_radii.h:15
impeller::TRect< Scalar >
impeller::TRect::Expand
constexpr TRect< T > Expand(T left, T top, T right, T bottom) const
Returns a rectangle with expanded edges. Negative expansion results in shrinking.
Definition: rect.h:622
impeller::TRect::GetBottom
constexpr auto GetBottom() const
Definition: rect.h:361
impeller::TRect::GetTop
constexpr auto GetTop() const
Definition: rect.h:357
impeller::TRect::IsEmpty
constexpr bool IsEmpty() const
Returns true if either of the width or height are 0, negative, or NaN.
Definition: rect.h:301
impeller::TRect::GetLeft
constexpr auto GetLeft() const
Definition: rect.h:355
impeller::TRect::GetRight
constexpr auto GetRight() const
Definition: rect.h:359
impeller::TRect< Scalar >::MakeXYWH
constexpr static TRect MakeXYWH(Type x, Type y, Type width, Type height)
Definition: rect.h:136
impeller::TRect< Scalar >::MakeLTRB
constexpr static TRect MakeLTRB(Type left, Type top, Type right, Type bottom)
Definition: rect.h:129
impeller::TSize< Scalar >
impeller::TSize::height
Type height
Definition: size.h:29
impeller::TSize::width
Type width
Definition: size.h:28