geng_draw2d/
text.rs

1use super::*;
2
3// TODO align?
4pub struct Text<F: std::borrow::Borrow<Font>, T: AsRef<str>> {
5    pub font: F,
6    pub text: T,
7    pub color: Rgba<f32>,
8    pub into_unit_transform: mat3<f32>,
9    pub transform: mat3<f32>,
10    pub true_transform: mat3<f32>, // TODO: only have this
11}
12
13impl<F: std::borrow::Borrow<Font>, T: AsRef<str>> Text<F, T> {
14    pub fn unit(font: F, text: T, color: Rgba<f32>) -> Self {
15        if let Some(aabb) = font
16            .borrow()
17            .measure(text.as_ref(), vec2::splat(TextAlign::LEFT))
18        {
19            let aspect = aabb.width() / aabb.height();
20            Self {
21                font,
22                text,
23                color,
24                into_unit_transform: (mat3::translate(aabb.center())
25                    * mat3::scale(aabb.size() / 2.0))
26                .inverse(),
27                transform: mat3::scale(vec2(aspect, 1.0)),
28                true_transform: mat3::translate(vec2(-aspect, -1.0)) * mat3::scale_uniform(4.0),
29            }
30        } else {
31            Self {
32                font,
33                text,
34                color,
35                into_unit_transform: mat3::identity(),
36                transform: mat3::scale_uniform(0.0),
37                true_transform: mat3::identity(),
38            }
39        }
40    }
41}
42
43impl<F: std::borrow::Borrow<Font>, T: AsRef<str>> Transform2d<f32> for Text<F, T> {
44    fn bounding_quad(&self) -> batbox_lapp::Quad<f32> {
45        batbox_lapp::Quad {
46            transform: self.transform,
47        }
48    }
49    fn apply_transform(&mut self, transform: mat3<f32>) {
50        self.transform = transform * self.transform;
51        self.true_transform = transform * self.true_transform;
52    }
53}
54
55impl<F: std::borrow::Borrow<Font>, T: AsRef<str>> Draw2d for Text<F, T> {
56    fn draw2d_transformed(
57        &self,
58        _: &Helper,
59        framebuffer: &mut ugli::Framebuffer,
60        camera: &dyn AbstractCamera2d,
61        transform: mat3<f32>,
62    ) {
63        self.font.borrow().draw(
64            framebuffer,
65            camera,
66            self.text.as_ref(),
67            vec2::splat(TextAlign::LEFT),
68            transform * self.transform * self.into_unit_transform,
69            self.color,
70        );
71    }
72}
geng_draw2d/text.rs

geng_draw2d/
text.rs
