svg2gcode/turtle/
dpi.rs

1use std::fmt::Debug;
2
3use lyon_geom::{CubicBezierSegment, Point, QuadraticBezierSegment, SvgArc, Vector, point, vector};
4use uom::si::{
5    f64::Length,
6    length::{inch, millimeter},
7};
8
9use crate::Turtle;
10
11/// Wrapper turtle that converts from user units to millimeters at a given DPI
12#[derive(Debug)]
13pub struct DpiConvertingTurtle<T: Turtle> {
14    pub dpi: f64,
15    pub inner: T,
16}
17
18impl<T: Turtle> DpiConvertingTurtle<T> {
19    fn to_mm(&self, value: f64) -> f64 {
20        Length::new::<inch>(value / self.dpi).get::<millimeter>()
21    }
22
23    fn point_to_mm(&self, p: Point<f64>) -> Point<f64> {
24        point(self.to_mm(p.x), self.to_mm(p.y))
25    }
26
27    fn vector_to_mm(&self, v: Vector<f64>) -> Vector<f64> {
28        vector(self.to_mm(v.x), self.to_mm(v.y))
29    }
30}
31
32impl<T: Turtle> Turtle for DpiConvertingTurtle<T> {
33    fn begin(&mut self) {
34        self.inner.begin()
35    }
36
37    fn end(&mut self) {
38        self.inner.end()
39    }
40
41    fn comment(&mut self, comment: String) {
42        self.inner.comment(comment)
43    }
44
45    fn move_to(&mut self, to: Point<f64>) {
46        self.inner.move_to(self.point_to_mm(to))
47    }
48
49    fn line_to(&mut self, to: Point<f64>) {
50        self.inner.line_to(self.point_to_mm(to))
51    }
52
53    fn arc(
54        &mut self,
55        SvgArc {
56            from,
57            to,
58            radii,
59            x_rotation,
60            flags,
61        }: SvgArc<f64>,
62    ) {
63        self.inner.arc(SvgArc {
64            from: self.point_to_mm(from),
65            to: self.point_to_mm(to),
66            radii: self.vector_to_mm(radii),
67            x_rotation,
68            flags,
69        })
70    }
71
72    fn cubic_bezier(
73        &mut self,
74        CubicBezierSegment {
75            from,
76            ctrl1,
77            ctrl2,
78            to,
79        }: CubicBezierSegment<f64>,
80    ) {
81        self.inner.cubic_bezier(CubicBezierSegment {
82            from: self.point_to_mm(from),
83            ctrl1: self.point_to_mm(ctrl1),
84            ctrl2: self.point_to_mm(ctrl2),
85            to: self.point_to_mm(to),
86        })
87    }
88
89    fn quadratic_bezier(
90        &mut self,
91        QuadraticBezierSegment { from, ctrl, to }: QuadraticBezierSegment<f64>,
92    ) {
93        self.inner.quadratic_bezier(QuadraticBezierSegment {
94            from: self.point_to_mm(from),
95            to: self.point_to_mm(to),
96            ctrl: self.point_to_mm(ctrl),
97        })
98    }
99}
svg2gcode/turtle/dpi.rs

svg2gcode/turtle/
dpi.rs
