| Flutter Impeller |

Macros | Functions
geometry_asserts.h File Reference
`#include <array>`
`#include <iostream>`
`#include "gtest/gtest.h"`
`#include "impeller/geometry/matrix.h"`
`#include "impeller/geometry/point.h"`
`#include "impeller/geometry/rect.h"`
`#include "impeller/geometry/size.h"`
`#include "impeller/geometry/vector.h"`

Go to the source code of this file.

## Macros
#define | ASSERT_MATRIX_NEAR(a, b) ASSERT_PRED2(&::MatrixNear, a, b)
#define | ASSERT_QUATERNION_NEAR(a, b) ASSERT_PRED2(&::QuaternionNear, a, b)
#define | ASSERT_RECT_NEAR(a, b) ASSERT_PRED2(&::RectNear, a, b)
#define | ASSERT_COLOR_NEAR(a, b) ASSERT_PRED2(&::ColorNear, a, b)
#define | ASSERT_POINT_NEAR(a, b) ASSERT_PRED2(&::PointNear, a, b)
#define | ASSERT_VECTOR3_NEAR(a, b) ASSERT_PRED2(&::Vector3Near, a, b)
#define | ASSERT_VECTOR4_NEAR(a, b) ASSERT_PRED2(&::Vector4Near, a, b)
#define | ASSERT_SIZE_NEAR(a, b) ASSERT_PRED2(&::SizeNear, a, b)
#define | ASSERT_ARRAY_4_NEAR(a, b) ASSERT_PRED2(&::Array4Near, a, b)
#define | ASSERT_COLOR_BUFFER_NEAR(a, b) ASSERT_PRED2(&::ColorBufferNear, a, b)
#define | ASSERT_COLORS_NEAR(a, b) ASSERT_PRED2(&::ColorsNear, a, b)
#define | EXPECT_MATRIX_NEAR(a, b) EXPECT_PRED2(&::MatrixNear, a, b)
#define | EXPECT_QUATERNION_NEAR(a, b) EXPECT_PRED2(&::QuaternionNear, a, b)
#define | EXPECT_RECT_NEAR(a, b) EXPECT_PRED2(&::RectNear, a, b)
#define | EXPECT_COLOR_NEAR(a, b) EXPECT_PRED2(&::ColorNear, a, b)
#define | EXPECT_POINT_NEAR(a, b) EXPECT_PRED2(&::PointNear, a, b)
#define | EXPECT_VECTOR3_NEAR(a, b) EXPECT_PRED2(&::Vector3Near, a, b)
#define | EXPECT_VECTOR4_NEAR(a, b) EXPECT_PRED2(&::Vector4Near, a, b)
#define | EXPECT_SIZE_NEAR(a, b) EXPECT_PRED2(&::SizeNear, a, b)
#define | EXPECT_ARRAY_4_NEAR(a, b) EXPECT_PRED2(&::Array4Near, a, b)
#define | EXPECT_COLOR_BUFFER_NEAR(a, b) EXPECT_PRED2(&::ColorBufferNear, a, b)
#define | EXPECT_COLORS_NEAR(a, b) EXPECT_PRED2(&::ColorsNear, a, b)

## Functions
bool | NumberNear (double a, double b)
inline ::testing::AssertionResult | MatrixNear (impeller::Matrix a, impeller::Matrix b)
inline ::testing::AssertionResult | QuaternionNear (impeller::Quaternion a, impeller::Quaternion b)
inline ::testing::AssertionResult | RectNear (impeller::Rect a, impeller::Rect b)
inline ::testing::AssertionResult | ColorNear (impeller::Color a, impeller::Color b)
inline ::testing::AssertionResult | PointNear (impeller::Point a, impeller::Point b)
inline ::testing::AssertionResult | Vector3Near (impeller::Vector3 a, impeller::Vector3 b)
inline ::testing::AssertionResult | Vector4Near (impeller::Vector4 a, impeller::Vector4 b)
inline ::testing::AssertionResult | SizeNear (impeller::Size a, impeller::Size b)
inline ::testing::AssertionResult | Array4Near (std::array< uint8_t, 4 > a, std::array< uint8_t, 4 > b)
inline ::testing::AssertionResult | ColorBufferNear (std::vector< uint8_t > a, std::vector< impeller::Color > b)
inline ::testing::AssertionResult | ColorsNear (std::vector< impeller::Color > a, std::vector< impeller::Color > b)

## Macro Definition Documentation

## ◆ ASSERT_ARRAY_4_NEAR

#define ASSERT_ARRAY_4_NEAR | ( |  | a,
|  |  | b
| ) |  | ASSERT_PRED2(&::Array4Near, a, b)

Definition at line 197 of file geometry_asserts.h.

## ◆ ASSERT_COLOR_BUFFER_NEAR

#define ASSERT_COLOR_BUFFER_NEAR | ( |  | a,
|  |  | b
| ) |  | ASSERT_PRED2(&::ColorBufferNear, a, b)

Definition at line 198 of file geometry_asserts.h.

## ◆ ASSERT_COLOR_NEAR

#define ASSERT_COLOR_NEAR | ( |  | a,
|  |  | b
| ) |  | ASSERT_PRED2(&::ColorNear, a, b)

Definition at line 192 of file geometry_asserts.h.

## ◆ ASSERT_COLORS_NEAR

#define ASSERT_COLORS_NEAR | ( |  | a,
|  |  | b
| ) |  | ASSERT_PRED2(&::ColorsNear, a, b)

Definition at line 199 of file geometry_asserts.h.

## ◆ ASSERT_MATRIX_NEAR

#define ASSERT_MATRIX_NEAR | ( |  | a,
|  |  | b
| ) |  | ASSERT_PRED2(&::MatrixNear, a, b)

Definition at line 189 of file geometry_asserts.h.

## ◆ ASSERT_POINT_NEAR

#define ASSERT_POINT_NEAR | ( |  | a,
|  |  | b
| ) |  | ASSERT_PRED2(&::PointNear, a, b)

Definition at line 193 of file geometry_asserts.h.

## ◆ ASSERT_QUATERNION_NEAR

#define ASSERT_QUATERNION_NEAR | ( |  | a,
|  |  | b
| ) |  | ASSERT_PRED2(&::QuaternionNear, a, b)

Definition at line 190 of file geometry_asserts.h.

## ◆ ASSERT_RECT_NEAR

#define ASSERT_RECT_NEAR | ( |  | a,
|  |  | b
| ) |  | ASSERT_PRED2(&::RectNear, a, b)

Definition at line 191 of file geometry_asserts.h.

## ◆ ASSERT_SIZE_NEAR

#define ASSERT_SIZE_NEAR | ( |  | a,
|  |  | b
| ) |  | ASSERT_PRED2(&::SizeNear, a, b)

Definition at line 196 of file geometry_asserts.h.

## ◆ ASSERT_VECTOR3_NEAR

#define ASSERT_VECTOR3_NEAR | ( |  | a,
|  |  | b
| ) |  | ASSERT_PRED2(&::Vector3Near, a, b)

Definition at line 194 of file geometry_asserts.h.

## ◆ ASSERT_VECTOR4_NEAR

#define ASSERT_VECTOR4_NEAR | ( |  | a,
|  |  | b
| ) |  | ASSERT_PRED2(&::Vector4Near, a, b)

Definition at line 195 of file geometry_asserts.h.

## ◆ EXPECT_ARRAY_4_NEAR

#define EXPECT_ARRAY_4_NEAR | ( |  | a,
|  |  | b
| ) |  | EXPECT_PRED2(&::Array4Near, a, b)

Definition at line 209 of file geometry_asserts.h.

## ◆ EXPECT_COLOR_BUFFER_NEAR

#define EXPECT_COLOR_BUFFER_NEAR | ( |  | a,
|  |  | b
| ) |  | EXPECT_PRED2(&::ColorBufferNear, a, b)

Definition at line 210 of file geometry_asserts.h.

## ◆ EXPECT_COLOR_NEAR

#define EXPECT_COLOR_NEAR | ( |  | a,
|  |  | b
| ) |  | EXPECT_PRED2(&::ColorNear, a, b)

Definition at line 204 of file geometry_asserts.h.

## ◆ EXPECT_COLORS_NEAR

#define EXPECT_COLORS_NEAR | ( |  | a,
|  |  | b
| ) |  | EXPECT_PRED2(&::ColorsNear, a, b)

Definition at line 211 of file geometry_asserts.h.

## ◆ EXPECT_MATRIX_NEAR

#define EXPECT_MATRIX_NEAR | ( |  | a,
|  |  | b
| ) |  | EXPECT_PRED2(&::MatrixNear, a, b)

Definition at line 201 of file geometry_asserts.h.

## ◆ EXPECT_POINT_NEAR

#define EXPECT_POINT_NEAR | ( |  | a,
|  |  | b
| ) |  | EXPECT_PRED2(&::PointNear, a, b)

Definition at line 205 of file geometry_asserts.h.

## ◆ EXPECT_QUATERNION_NEAR

#define EXPECT_QUATERNION_NEAR | ( |  | a,
|  |  | b
| ) |  | EXPECT_PRED2(&::QuaternionNear, a, b)

Definition at line 202 of file geometry_asserts.h.

## ◆ EXPECT_RECT_NEAR

#define EXPECT_RECT_NEAR | ( |  | a,
|  |  | b
| ) |  | EXPECT_PRED2(&::RectNear, a, b)

Definition at line 203 of file geometry_asserts.h.

## ◆ EXPECT_SIZE_NEAR

#define EXPECT_SIZE_NEAR | ( |  | a,
|  |  | b
| ) |  | EXPECT_PRED2(&::SizeNear, a, b)

Definition at line 208 of file geometry_asserts.h.

## ◆ EXPECT_VECTOR3_NEAR

#define EXPECT_VECTOR3_NEAR | ( |  | a,
|  |  | b
| ) |  | EXPECT_PRED2(&::Vector3Near, a, b)

Definition at line 206 of file geometry_asserts.h.

## ◆ EXPECT_VECTOR4_NEAR

#define EXPECT_VECTOR4_NEAR | ( |  | a,
|  |  | b
| ) |  | EXPECT_PRED2(&::Vector4Near, a, b)

Definition at line 207 of file geometry_asserts.h.

## Function Documentation

## ◆ Array4Near()

inline ::testing::AssertionResult Array4Near | ( | std::array< uint8_t, 4 > | a,
|  | std::array< uint8_t, 4 > | b
| ) |  |

Definition at line 143 of file geometry_asserts.h.

144 {
145 auto equal = NumberNear(a[0], b[0]) && NumberNear(a[1], b[1]) &&
146 NumberNear(a[2], b[2]) && NumberNear(a[3], b[3]);
147
148 return equal ? ::testing::AssertionSuccess()
149 : ::testing::AssertionFailure() << "Arrays are not equal.";
150 }

References impeller::saturated::b, and NumberNear().

## ◆ ColorBufferNear()

inline ::testing::AssertionResult ColorBufferNear | ( | std::vector< uint8_t > | a,
|  | std::vector< impeller::Color > | b
| ) |  |

Definition at line 152 of file geometry_asserts.h.

154 {
155 if (a.size() != b.size() * 4) {
156 return ::testing::AssertionFailure()
157 << "Color buffer length does not match";
158 }
159 for (auto i = 0u; i < b.size(); i++) {
160 auto right = b[i].Premultiply().ToR8G8B8A8();
161 auto j = i * 4;
162 auto equal = NumberNear(a[j], right[0]) && NumberNear(a[j + 1], right[1]) &&
163 NumberNear(a[j + 2], right[2]) &&
164 NumberNear(a[j + 3], right[3]);
165 if (!equal) {
166 ::testing::AssertionFailure() << "Color buffers are not equal.";
167 }
168 }
169 return ::testing::AssertionSuccess();
170 }

References impeller::saturated::b, and NumberNear().

## ◆ ColorNear()

inline ::testing::AssertionResult ColorNear | ( | impeller::Color | a,
|  | impeller::Color | b
| ) |  |

Definition at line 100 of file geometry_asserts.h.

101 {
102 auto equal = NumberNear(a.red, b.red) && NumberNear(a.green, b.green) &&
103 NumberNear(a.blue, b.blue) && NumberNear(a.alpha, b.alpha);
104
105 return equal ? ::testing::AssertionSuccess()
106 : ::testing::AssertionFailure() << "Colors are not equal.";
107 }

References impeller::Color::alpha, impeller::saturated::b, impeller::Color::blue, impeller::Color::green, NumberNear(), and impeller::Color::red.

## ◆ ColorsNear()

inline ::testing::AssertionResult ColorsNear | ( | std::vector< impeller::Color > | a,
|  | std::vector< impeller::Color > | b
| ) |  |

Definition at line 172 of file geometry_asserts.h.

173 {
174 if (a.size() != b.size()) {
175 return ::testing::AssertionFailure() << "Colors length does not match";
176 }
177 for (auto i = 0u; i < b.size(); i++) {
178 auto equal =
179 NumberNear(a[i].red, b[i].red) && NumberNear(a[i].green, b[i].green) &&
180 NumberNear(a[i].blue, b[i].blue) && NumberNear(a[i].alpha, b[i].alpha);
181
182 if (!equal) {
183 ::testing::AssertionFailure() << "Colors are not equal.";
184 }
185 }
186 return ::testing::AssertionSuccess();
187 }

References impeller::saturated::b, and NumberNear().

## ◆ MatrixNear()

inline ::testing::AssertionResult MatrixNear | ( | impeller::Matrix | a,
|  | impeller::Matrix | b
| ) |  |

Definition at line 56 of file geometry_asserts.h.

57 {
58 auto equal = NumberNear(a.m[0], b.m[0]) //
59 && NumberNear(a.m[1], b.m[1]) //
60 && NumberNear(a.m[2], b.m[2]) //
61 && NumberNear(a.m[3], b.m[3]) //
62 && NumberNear(a.m[4], b.m[4]) //
63 && NumberNear(a.m[5], b.m[5]) //
64 && NumberNear(a.m[6], b.m[6]) //
65 && NumberNear(a.m[7], b.m[7]) //
66 && NumberNear(a.m[8], b.m[8]) //
67 && NumberNear(a.m[9], b.m[9]) //
68 && NumberNear(a.m[10], b.m[10]) //
69 && NumberNear(a.m[11], b.m[11]) //
70 && NumberNear(a.m[12], b.m[12]) //
71 && NumberNear(a.m[13], b.m[13]) //
72 && NumberNear(a.m[14], b.m[14]) //
73 && NumberNear(a.m[15], b.m[15]);
74
75 return equal ? ::testing::AssertionSuccess()
76 : ::testing::AssertionFailure()
77 << "Matrixes are not equal " << a << " " << b;
78 }

References impeller::saturated::b, impeller::Matrix::m, and NumberNear().

Referenced by impeller::testing::TEST().

## ◆ NumberNear()

bool NumberNear | ( | double | a,
|  | double | b
| ) |  |
| inline

Definition at line 18 of file geometry_asserts.h.

18 {
19 if (a == b) {
20 return true;
21 }
22 if (std::isnan(a) || std::isnan(b)) {
23 return false;
24 }
25
26 // We used to compare based on an absolute difference of 1e-3 which
27 // would allow up to 10 bits of mantissa difference in a float
28 // (leaving 14 bits of accuracy being tested). Some numbers in the tests
29 // will fail with a bit difference of up to 19 (a little over 4 bits) even
30 // though the numbers print out identically using the float ostream output
31 // at the default output precision. Choosing a max "units of least precision"
32 // of 32 allows up to 5 bits of imprecision.
33 static constexpr float kImpellerTestingMaxULP = 32;
34
35 // We also impose a minimum step size so that cases of comparing numbers
36 // very close to 0.0 don't compute a huge number of ULPs due to the ever
37 // increasing precision near 0. This value is approximately the step size
38 // of numbers going less than 1.0f.
39 static constexpr float kMinimumULPStep = (1.0f / (1 << 24));
40
41 auto adjust_step = [](float v) {
42 return (std::abs(v) < kMinimumULPStep) ? std::copysignf(kMinimumULPStep, v)
43 : v;
44 };
45
46 float step_ab = adjust_step(a - std::nexttowardf(a, b));
47 float step_ba = adjust_step(b - std::nexttowardf(b, a));
48
49 float ab_ulps = (a - b) / step_ab;
50 float ba_ulps = (b - a) / step_ba;
51 FML_CHECK(ab_ulps >= 0 && ba_ulps >= 0);
52
53 return (std::min(ab_ulps, ba_ulps) < kImpellerTestingMaxULP);
54 }

References impeller::saturated::b.

Referenced by Array4Near(), ColorBufferNear(), ColorNear(), ColorsNear(), MatrixNear(), PointNear(), QuaternionNear(), RectNear(), SizeNear(), impeller::testing::TEST_P(), Vector3Near(), and Vector4Near().

## ◆ PointNear()

inline ::testing::AssertionResult PointNear | ( | impeller::Point | a,
|  | impeller::Point | b
| ) |  |

Definition at line 109 of file geometry_asserts.h.

110 {
111 auto equal = NumberNear(a.x, b.x) && NumberNear(a.y, b.y);
112
113 return equal ? ::testing::AssertionSuccess()
114 : ::testing::AssertionFailure()
115 << "Points are not equal (" << a << " " << b << ").";
116 }

References impeller::saturated::b, NumberNear(), impeller::TPoint< T >::x, and impeller::TPoint< T >::y.

Referenced by SolidVerticesNear(), and TextureVerticesNear().

## ◆ QuaternionNear()

inline ::testing::AssertionResult QuaternionNear | ( | impeller::Quaternion | a,
|  | impeller::Quaternion | b
| ) |  |

Definition at line 80 of file geometry_asserts.h.

81 {
82 auto equal = NumberNear(a.x, b.x) && NumberNear(a.y, b.y) &&
83 NumberNear(a.z, b.z) && NumberNear(a.w, b.w);
84
85 return equal ? ::testing::AssertionSuccess()
86 : ::testing::AssertionFailure() << "Quaternions are not equal.";
87 }

References impeller::saturated::b, NumberNear(), impeller::Quaternion::w, impeller::Quaternion::x, impeller::Quaternion::y, and impeller::Quaternion::z.

## ◆ RectNear()

inline ::testing::AssertionResult RectNear | ( | impeller::Rect | a,
|  | impeller::Rect | b
| ) |  |

Definition at line 89 of file geometry_asserts.h.

89 {
90 auto equal = NumberNear(a.GetLeft(), b.GetLeft()) &&
91 NumberNear(a.GetTop(), b.GetTop()) &&
92 NumberNear(a.GetRight(), b.GetRight()) &&
93 NumberNear(a.GetBottom(), b.GetBottom());
94
95 return equal ? ::testing::AssertionSuccess()
96 : ::testing::AssertionFailure()
97 << "Rects are not equal (" << a << " " << b << ")";
98 }

References impeller::saturated::b, impeller::TRect< T >::GetBottom(), impeller::TRect< T >::GetLeft(), impeller::TRect< T >::GetRight(), impeller::TRect< T >::GetTop(), and NumberNear().

Referenced by impeller::testing::TEST(), and impeller::testing::TEST_P().

## ◆ SizeNear()

inline ::testing::AssertionResult SizeNear | ( | impeller::Size | a,
|  | impeller::Size | b
| ) |  |

Definition at line 136 of file geometry_asserts.h.

136 {
137 auto equal = NumberNear(a.width, b.width) && NumberNear(a.height, b.height);
138
139 return equal ? ::testing::AssertionSuccess()
140 : ::testing::AssertionFailure() << "Sizes are not equal.";
141 }

References impeller::saturated::b, impeller::TSize< T >::height, NumberNear(), and impeller::TSize< T >::width.

## ◆ Vector3Near()

inline ::testing::AssertionResult Vector3Near | ( | impeller::Vector3 | a,
|  | impeller::Vector3 | b
| ) |  |

Definition at line 118 of file geometry_asserts.h.

119 {
120 auto equal =
121 NumberNear(a.x, b.x) && NumberNear(a.y, b.y) && NumberNear(a.z, b.z);
122
123 return equal ? ::testing::AssertionSuccess()
124 : ::testing::AssertionFailure() << "Vector3s are not equal.";
125 }

References impeller::saturated::b, NumberNear(), impeller::Vector3::x, impeller::Vector3::y, and impeller::Vector3::z.

## ◆ Vector4Near()

inline ::testing::AssertionResult Vector4Near | ( | impeller::Vector4 | a,
|  | impeller::Vector4 | b
| ) |  |

Definition at line 127 of file geometry_asserts.h.

128 {
129 auto equal = NumberNear(a.x, b.x) && NumberNear(a.y, b.y) &&
130 NumberNear(a.z, b.z) && NumberNear(a.w, b.w);
131
132 return equal ? ::testing::AssertionSuccess()
133 : ::testing::AssertionFailure() << "Vector4s are not equal.";
134 }

References impeller::saturated::b, NumberNear(), impeller::Vector4::w, impeller::Vector4::x, impeller::Vector4::y, and impeller::Vector4::z.

impeller::Matrix::m
Scalar m[16]
Definition: matrix.h:39
NumberNear
bool NumberNear(double a, double b)
Definition: geometry_asserts.h:18
impeller::Quaternion::z
Scalar z
Definition: quaternion.h:19
impeller::TPoint::y
Type y
Definition: point.h:31
impeller::Quaternion::w
Scalar w
Definition: quaternion.h:20
impeller::Color::alpha
Scalar alpha
Definition: color.h:142
impeller::Color::green
Scalar green
Definition: color.h:132
impeller::Vector3::x
Scalar x
Definition: vector.h:23
impeller::Quaternion::x
Scalar x
Definition: quaternion.h:17
impeller::TRect::GetLeft
constexpr auto GetLeft() const
Definition: rect.h:345
impeller::Color::red
Scalar red
Definition: color.h:127
impeller::Vector3::z
Scalar z
Definition: vector.h:25
impeller::Vector4::x
Scalar x
Definition: vector.h:235
impeller::Vector3::y
Scalar y
Definition: vector.h:24
impeller::TSize::width
Type width
Definition: size.h:22
impeller::TPoint::x
Type x
Definition: point.h:30
impeller::Vector4::w
Scalar w
Definition: vector.h:238
impeller::TRect::GetRight
constexpr auto GetRight() const
Definition: rect.h:349
impeller::Vector4::y
Scalar y
Definition: vector.h:236
impeller::saturated::b
SI b
Definition: saturated_math.h:87
impeller::Quaternion::y
Scalar y
Definition: quaternion.h:18
impeller::TRect::GetBottom
constexpr auto GetBottom() const
Definition: rect.h:351
impeller::TSize::height
Type height
Definition: size.h:23
impeller::Color::blue
Scalar blue
Definition: color.h:137
impeller::Vector4::z
Scalar z
Definition: vector.h:237
impeller::TRect::GetTop
constexpr auto GetTop() const
Definition: rect.h:347