1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
use point2f::Point2f;
#[cfg(all(windows, feature = "d2d"))]
use winapi::um::d2d1::D2D1_BEZIER_SEGMENT;
#[derive(Copy, Clone, Debug, Default, PartialEq)]
#[cfg_attr(feature = "serde_derive", derive(Serialize, Deserialize))]
#[repr(C)]
pub struct BezierSegment {
pub p1: Point2f,
pub p2: Point2f,
pub p3: Point2f,
}
impl BezierSegment {
#[inline]
pub fn new(
p1: impl Into<Point2f>,
p2: impl Into<Point2f>,
p3: impl Into<Point2f>,
) -> BezierSegment {
BezierSegment {
p1: p1.into(),
p2: p2.into(),
p3: p3.into(),
}
}
}
impl<P1, P2, P3> From<(P1, P2, P3)> for BezierSegment
where
P1: Into<Point2f>,
P2: Into<Point2f>,
P3: Into<Point2f>,
{
#[inline]
fn from((p1, p2, p3): (P1, P2, P3)) -> BezierSegment {
BezierSegment {
p1: p1.into(),
p2: p2.into(),
p3: p3.into(),
}
}
}
#[cfg(all(windows, feature = "d2d"))]
impl From<BezierSegment> for D2D1_BEZIER_SEGMENT {
#[inline]
fn from(seg: BezierSegment) -> D2D1_BEZIER_SEGMENT {
D2D1_BEZIER_SEGMENT {
point1: seg.p1.into(),
point2: seg.p2.into(),
point3: seg.p3.into(),
}
}
}
#[cfg(all(windows, feature = "d2d"))]
impl From<D2D1_BEZIER_SEGMENT> for BezierSegment {
#[inline]
fn from(seg: D2D1_BEZIER_SEGMENT) -> BezierSegment {
BezierSegment {
p1: seg.point1.into(),
p2: seg.point2.into(),
p3: seg.point3.into(),
}
}
}
#[cfg(all(test, windows, feature = "d2d"))]
#[test]
fn bezier_d2d_bin_compat() {
use std::mem::size_of_val;
fn ptr_eq<T>(a: &T, b: &T) -> bool {
(a as *const T) == (b as *const T)
}
let bez = BezierSegment::new((0.0, 0.0), (1.0, 0.0), (1.0, 1.0));
let d2d = unsafe { &*((&bez) as *const _ as *const D2D1_BEZIER_SEGMENT) };
assert!(ptr_eq(&bez.p1.x, &d2d.point1.x));
assert!(ptr_eq(&bez.p1.y, &d2d.point1.y));
assert!(ptr_eq(&bez.p2.x, &d2d.point2.x));
assert!(ptr_eq(&bez.p2.y, &d2d.point2.y));
assert!(ptr_eq(&bez.p3.x, &d2d.point3.x));
assert!(ptr_eq(&bez.p3.y, &d2d.point3.y));
assert_eq!(size_of_val(&bez), size_of_val(d2d));
}