buoyant 0.5.0-alpha.4

SwiftUI-like UIs in Rust for embedded devices
Documentation 
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use crate::{primitives::Size, surface::Surface};

use super::{Font, FontMetrics, FontRender};

/// A simple font for rendering non-Unicode characters in a text buffer
/// The width and height of all characters is 1.
#[derive(Default, Clone, Copy, Debug, PartialEq, Eq)]
pub struct CharacterBufferFont;

impl Font for CharacterBufferFont {
    fn metrics(&self) -> impl FontMetrics {
        CharacterBufferFontMetrics
    }
}

impl crate::font::Sealed for CharacterBufferFont {}

impl<C> FontRender<C> for CharacterBufferFont {
    fn draw(&self, _character: char, _foreground: C, _surface: &mut impl Surface<Color = C>) {}
}

struct CharacterBufferFontMetrics;
impl FontMetrics for CharacterBufferFontMetrics {
    fn advance(&self, _: char) -> u32 {
        1
    }

    fn rendered_size(&self, _: char) -> Size {
        Size::new(1, 1)
    }

    fn default_line_height(&self) -> u32 {
        1
    }

    fn baseline(&self) -> u32 {
        1
    }
}