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use ab_glyph::{FontArc, FontVec, InvalidFont, OutlinedGlyph};
use bevy_reflect::TypeUuid;
use bevy_render::{
color::Color,
texture::{Extent3d, Texture, TextureDimension, TextureFormat},
};
#[derive(Debug, TypeUuid)]
#[uuid = "97059ac6-c9ba-4da9-95b6-bed82c3ce198"]
pub struct Font {
pub font: FontArc,
}
impl Font {
pub fn try_from_bytes(font_data: Vec<u8>) -> Result<Self, InvalidFont> {
let font = FontVec::try_from_vec(font_data)?;
let font = FontArc::new(font);
Ok(Font { font })
}
pub fn get_outlined_glyph_texture(outlined_glyph: OutlinedGlyph) -> Texture {
let bounds = outlined_glyph.px_bounds();
let width = bounds.width() as usize;
let height = bounds.height() as usize;
let mut alpha = vec![0.0; width * height];
outlined_glyph.draw(|x, y, v| {
alpha[y as usize * width + x as usize] = v;
});
let color = Color::WHITE;
let color_u8 = [
(color.r() * 255.0) as u8,
(color.g() * 255.0) as u8,
(color.b() * 255.0) as u8,
];
Texture::new(
Extent3d::new(width as u32, height as u32, 1),
TextureDimension::D2,
alpha
.iter()
.map(|a| {
vec![
color_u8[0],
color_u8[1],
color_u8[2],
(color.a() * a * 255.0) as u8,
]
})
.flatten()
.collect::<Vec<u8>>(),
TextureFormat::Rgba8UnormSrgb,
)
}
}