makepad_draw/text/
sdfer.rs

1use {
2    super::image::{Subimage, SubimageMut, R},
3    std::fmt,
4};
5
6pub struct Sdfer {
7    settings: Settings,
8    reusable_buffers: Option<sdfer::esdt::ReusableBuffers>,
9}
10
11impl Sdfer {
12    pub fn new(settings: Settings) -> Self {
13        Self {
14            settings,
15            reusable_buffers: None,
16        }
17    }
18
19    pub fn settings(&self) -> Settings {
20        self.settings
21    }
22
23    pub fn coverage_to_sdf(&mut self, coverage: &Subimage<'_, R>, output: &mut SubimageMut<'_, R>) {
24        use {
25            super::geom::{Point, Size},
26            sdfer::{esdt, esdt::Params, Image2d, Unorm8},
27        };
28
29        assert_eq!(
30            output.size() - coverage.size(),
31            Size::from(self.settings.padding) * 2,
32        );
33        let mut pixels = Vec::with_capacity(coverage.size().width * coverage.size().height);
34        for y in 0..coverage.size().height {
35            for x in 0..coverage.size().width {
36                pixels.push(Unorm8::from_bits(coverage[Point::new(x, y)].r()));
37            }
38        }
39        let mut coverage =
40            Image2d::from_storage(coverage.size().width, coverage.size().height, pixels);
41        let (sdf, reusable_buffers) = esdt::glyph_to_sdf(
42            &mut coverage,
43            Params {
44                pad: self.settings.padding,
45                radius: self.settings.radius,
46                cutoff: self.settings.cutoff,
47                ..Params::default()
48            },
49            self.reusable_buffers.take(),
50        );
51        self.reusable_buffers = Some(reusable_buffers);
52        for y in 0..sdf.height() {
53            for x in 0..sdf.width() {
54                output[Point::new(x, y)] = R::new(sdf[(x, y)].to_bits())
55            }
56        }
57    }
58}
59
60impl fmt::Debug for Sdfer {
61    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
62        f.debug_struct("Sdfer").finish_non_exhaustive()
63    }
64}
65
66#[derive(Clone, Copy, Debug)]
67pub struct Settings {
68    pub padding: usize,
69    pub radius: f32,
70    pub cutoff: f32,
71}
makepad_draw/text/sdfer.rs

makepad_draw/text/
sdfer.rs
