xref: /aosp_15_r20/external/skia/tests/PathOpsDVectorTest.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
1*c8dee2aaSAndroid Build Coastguard Worker /*
2*c8dee2aaSAndroid Build Coastguard Worker  * Copyright 2012 Google Inc.
3*c8dee2aaSAndroid Build Coastguard Worker  *
4*c8dee2aaSAndroid Build Coastguard Worker  * Use of this source code is governed by a BSD-style license that can be
5*c8dee2aaSAndroid Build Coastguard Worker  * found in the LICENSE file.
6*c8dee2aaSAndroid Build Coastguard Worker  */
7*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkPoint.h"
8*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkScalar.h"
9*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkTypes.h"
10*c8dee2aaSAndroid Build Coastguard Worker #include "src/pathops/SkPathOpsPoint.h"
11*c8dee2aaSAndroid Build Coastguard Worker #include "src/pathops/SkPathOpsTypes.h"
12*c8dee2aaSAndroid Build Coastguard Worker #include "tests/PathOpsTestCommon.h"
13*c8dee2aaSAndroid Build Coastguard Worker #include "tests/Test.h"
14*c8dee2aaSAndroid Build Coastguard Worker 
15*c8dee2aaSAndroid Build Coastguard Worker #include <array>
16*c8dee2aaSAndroid Build Coastguard Worker #include <cmath>
17*c8dee2aaSAndroid Build Coastguard Worker #include <cstddef>
18*c8dee2aaSAndroid Build Coastguard Worker #include <limits>
19*c8dee2aaSAndroid Build Coastguard Worker 
20*c8dee2aaSAndroid Build Coastguard Worker static const SkDPoint tests[] = {
21*c8dee2aaSAndroid Build Coastguard Worker     {0, 0},
22*c8dee2aaSAndroid Build Coastguard Worker     {1, 0},
23*c8dee2aaSAndroid Build Coastguard Worker     {0, 1},
24*c8dee2aaSAndroid Build Coastguard Worker     {2, 1},
25*c8dee2aaSAndroid Build Coastguard Worker     {1, 2},
26*c8dee2aaSAndroid Build Coastguard Worker     {1, 1},
27*c8dee2aaSAndroid Build Coastguard Worker     {2, 2}
28*c8dee2aaSAndroid Build Coastguard Worker };
29*c8dee2aaSAndroid Build Coastguard Worker 
30*c8dee2aaSAndroid Build Coastguard Worker static const size_t tests_count = std::size(tests);
31*c8dee2aaSAndroid Build Coastguard Worker 
DEF_TEST(PathOpsDVector,reporter)32*c8dee2aaSAndroid Build Coastguard Worker DEF_TEST(PathOpsDVector, reporter) {
33*c8dee2aaSAndroid Build Coastguard Worker     for (size_t index = 0; index < tests_count - 1; ++index) {
34*c8dee2aaSAndroid Build Coastguard Worker         SkDVector v1 = tests[index + 1] - tests[index];
35*c8dee2aaSAndroid Build Coastguard Worker         SkASSERT(ValidVector(v1));
36*c8dee2aaSAndroid Build Coastguard Worker         SkDVector v2 = tests[index] - tests[index + 1];
37*c8dee2aaSAndroid Build Coastguard Worker         SkASSERT(ValidVector(v2));
38*c8dee2aaSAndroid Build Coastguard Worker         v1 += v2;
39*c8dee2aaSAndroid Build Coastguard Worker         REPORTER_ASSERT(reporter, v1.fX == 0 && v1.fY == 0);
40*c8dee2aaSAndroid Build Coastguard Worker         v2 -= static_cast<decltype(v2)&>(v2);
41*c8dee2aaSAndroid Build Coastguard Worker         REPORTER_ASSERT(reporter, v2.fX == 0 && v2.fY == 0);
42*c8dee2aaSAndroid Build Coastguard Worker         v1 = tests[index + 1] - tests[index];
43*c8dee2aaSAndroid Build Coastguard Worker         v1 /= 2;
44*c8dee2aaSAndroid Build Coastguard Worker         v1 *= 2;
45*c8dee2aaSAndroid Build Coastguard Worker         v1 -= tests[index + 1] - tests[index];
46*c8dee2aaSAndroid Build Coastguard Worker         REPORTER_ASSERT(reporter, v1.fX == 0 && v1.fY == 0);
47*c8dee2aaSAndroid Build Coastguard Worker         SkVector sv = v1.asSkVector();
48*c8dee2aaSAndroid Build Coastguard Worker         REPORTER_ASSERT(reporter, sv.fX == 0 && sv.fY == 0);
49*c8dee2aaSAndroid Build Coastguard Worker         v1 = tests[index + 1] - tests[index];
50*c8dee2aaSAndroid Build Coastguard Worker         double lenSq = v1.lengthSquared();
51*c8dee2aaSAndroid Build Coastguard Worker         double v1Dot = v1.dot(v1);
52*c8dee2aaSAndroid Build Coastguard Worker         REPORTER_ASSERT(reporter, lenSq == v1Dot);
53*c8dee2aaSAndroid Build Coastguard Worker         REPORTER_ASSERT(reporter, approximately_equal(sqrt(lenSq), v1.length()));
54*c8dee2aaSAndroid Build Coastguard Worker         double v1Cross = v1.cross(v1);
55*c8dee2aaSAndroid Build Coastguard Worker         REPORTER_ASSERT(reporter, v1Cross == 0);
56*c8dee2aaSAndroid Build Coastguard Worker     }
57*c8dee2aaSAndroid Build Coastguard Worker }
58*c8dee2aaSAndroid Build Coastguard Worker 
DEF_TEST(SkDVector_normalize,reporter)59*c8dee2aaSAndroid Build Coastguard Worker DEF_TEST(SkDVector_normalize, reporter) {
60*c8dee2aaSAndroid Build Coastguard Worker     // See also SkVx_normalize
61*c8dee2aaSAndroid Build Coastguard Worker     auto assertDoublesEqual = [&](double left, double right) {
62*c8dee2aaSAndroid Build Coastguard Worker         REPORTER_ASSERT(reporter, SkScalarNearlyEqual(left, right), "%f != %f", left, right);
63*c8dee2aaSAndroid Build Coastguard Worker     };
64*c8dee2aaSAndroid Build Coastguard Worker     SkDVector first{1.2, 3.4};
65*c8dee2aaSAndroid Build Coastguard Worker     first.normalize();
66*c8dee2aaSAndroid Build Coastguard Worker     REPORTER_ASSERT(reporter, first.isFinite());
67*c8dee2aaSAndroid Build Coastguard Worker     assertDoublesEqual(first.fX, 0.332820);
68*c8dee2aaSAndroid Build Coastguard Worker     assertDoublesEqual(first.fY, 0.942990);
69*c8dee2aaSAndroid Build Coastguard Worker 
70*c8dee2aaSAndroid Build Coastguard Worker     SkDVector second{2.3, -4.5};
71*c8dee2aaSAndroid Build Coastguard Worker     second.normalize();
72*c8dee2aaSAndroid Build Coastguard Worker     REPORTER_ASSERT(reporter, second.isFinite());
73*c8dee2aaSAndroid Build Coastguard Worker     assertDoublesEqual(second.fX,  0.455111);
74*c8dee2aaSAndroid Build Coastguard Worker     assertDoublesEqual(second.fY, -0.890435);
75*c8dee2aaSAndroid Build Coastguard Worker }
76*c8dee2aaSAndroid Build Coastguard Worker 
DEF_TEST(SkDVector_normalize_infinity_and_nan,reporter)77*c8dee2aaSAndroid Build Coastguard Worker DEF_TEST(SkDVector_normalize_infinity_and_nan, reporter) {
78*c8dee2aaSAndroid Build Coastguard Worker     // See also SkVx_normalize_infinity_and_nan
79*c8dee2aaSAndroid Build Coastguard Worker     SkDVector first{0, 0};
80*c8dee2aaSAndroid Build Coastguard Worker     first.normalize();
81*c8dee2aaSAndroid Build Coastguard Worker     REPORTER_ASSERT(reporter, !first.isFinite());
82*c8dee2aaSAndroid Build Coastguard Worker     REPORTER_ASSERT(reporter, std::isnan(first.fX), "%f is not nan", first.fX);
83*c8dee2aaSAndroid Build Coastguard Worker     REPORTER_ASSERT(reporter, std::isnan(first.fY), "%f is not nan", first.fY);
84*c8dee2aaSAndroid Build Coastguard Worker 
85*c8dee2aaSAndroid Build Coastguard Worker     SkDVector second{std::numeric_limits<double>::max(),
86*c8dee2aaSAndroid Build Coastguard Worker                      std::numeric_limits<double>::max()};
87*c8dee2aaSAndroid Build Coastguard Worker     second.normalize();
88*c8dee2aaSAndroid Build Coastguard Worker     REPORTER_ASSERT(reporter, second.isFinite());
89*c8dee2aaSAndroid Build Coastguard Worker     REPORTER_ASSERT(reporter, second.fX == 0, "%f != 0", second.fX);
90*c8dee2aaSAndroid Build Coastguard Worker     REPORTER_ASSERT(reporter, second.fY == 0, "%f != 0", second.fY);
91*c8dee2aaSAndroid Build Coastguard Worker }
92*c8dee2aaSAndroid Build Coastguard Worker 
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