embedded_graphics/fonts/font24x32.rs
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use crate::{fonts::Font, geometry::Size};
/// 24x32 pixel monospace font.
///
/// The 24x32 font is a 2x scaling of the [12x16 font].
///
/// The 12x16 font sprite is shown here for reference:
///
/// [](https://raw.githubusercontent.com/jamwaffles/embedded-graphics/master/embedded-graphics/data/font12x16.png)
///
/// # Examples
///
/// See the [module-level documentation](./index.html) for examples.
///
/// [12x16 font]: struct.Font12x16.html
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug, Default)]
pub struct Font24x32;
impl Font for Font24x32 {
const FONT_IMAGE: &'static [u8] = include_bytes!("../../data/font24x32_1bpp.raw");
const FONT_IMAGE_WIDTH: u32 = 960;
const CHARACTER_SIZE: Size = Size::new(24, 32);
fn char_offset(c: char) -> u32 {
let fallback = '?' as u32 - ' ' as u32;
if c < ' ' {
return fallback;
}
if c <= '~' {
return c as u32 - ' ' as u32;
}
if c < '¡' || c > 'ÿ' {
return fallback;
}
c as u32 - ' ' as u32 - 34
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::{
drawable::Drawable,
fonts::{Font, Text},
geometry::{Dimensions, Point, Size},
mock_display::MockDisplay,
pixelcolor::BinaryColor,
style::TextStyle,
transform::Transform,
};
const WIDTH: usize = Font24x32::CHARACTER_SIZE.width as usize;
const HEIGHT: usize = Font24x32::CHARACTER_SIZE.height as usize;
const HELLO_WORLD: &'static str = "Hello World!";
#[test]
fn text_dimensions() {
let style = TextStyle::new(Font24x32, BinaryColor::On);
let hello = Text::new(HELLO_WORLD, Point::zero()).into_styled(style);
let empty = Text::new("", Point::zero()).into_styled(style);
assert_eq!(
hello.size(),
Size::new((HELLO_WORLD.len() * WIDTH) as u32, HEIGHT as u32)
);
assert_eq!(empty.size(), Size::new(0, 0));
}
#[test]
fn text_corners() {
let style = TextStyle::new(Font24x32, BinaryColor::On);
let hello = Text::new(HELLO_WORLD, Point::zero())
.into_styled(style)
.translate(Point::new(5, -20));
let empty = Text::new("", Point::zero())
.into_styled(style)
.translate(Point::new(10, 20));
assert_eq!(hello.top_left(), Point::new(5, -20));
assert_eq!(
hello.bottom_right(),
Point::new(
((HELLO_WORLD.len() * WIDTH) as i32) + 5,
(HEIGHT as i32) - 20
)
);
assert_eq!(empty.top_left(), Point::new(10, 20));
assert_eq!(empty.bottom_right(), Point::new(10, 20));
}
#[test]
fn correct_m() -> Result<(), core::convert::Infallible> {
let mut display = MockDisplay::new();
Text::new("Mm", Point::zero())
.into_styled(TextStyle::new(Font24x32, BinaryColor::On))
.draw(&mut display)?;
assert_eq!(
display,
MockDisplay::from_pattern(&[
"#### #### ",
"#### #### ",
"#### #### ",
"#### #### ",
"######## ######## ",
"######## ######## ",
"######## ######## ",
"######## ######## ",
"#### #### #### ######## #### ",
"#### #### #### ######## #### ",
"#### #### #### ######## #### ",
"#### #### #### ######## #### ",
"#### #### #### #### #### #### ",
"#### #### #### #### #### #### ",
"#### #### #### #### #### #### ",
"#### #### #### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
])
);
Ok(())
}
#[test]
fn correct_ascii_borders() -> Result<(), core::convert::Infallible> {
let mut display = MockDisplay::new();
Text::new(" ~", Point::zero())
.into_styled(TextStyle::new(Font24x32, BinaryColor::On))
.draw(&mut display)?;
assert_eq!(
display,
MockDisplay::from_pattern(&[
" ######## #### ",
" ######## #### ",
" ######## #### ",
" ######## #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
])
);
Ok(())
}
#[test]
fn correct_dollar_y() -> Result<(), core::convert::Infallible> {
let mut display = MockDisplay::new();
Text::new("$y", Point::zero())
.into_styled(TextStyle::new(Font24x32, BinaryColor::On))
.draw(&mut display)?;
assert_eq!(
display,
MockDisplay::from_pattern(&[
" #### ",
" #### ",
" #### ",
" #### ",
" ################ ",
" ################ ",
" ################ ",
" ################ ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
" ############ #### #### ",
" ############ #### #### ",
" ############ #### #### ",
" ############ #### #### ",
" #### #### #### #### ",
" #### #### #### #### ",
" #### #### #### #### ",
" #### #### #### #### ",
"################ ################ ",
"################ ################ ",
"################ ################ ",
"################ ################ ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" ############ ",
" ############ ",
" ############ ",
" ############ ",
])
);
Ok(())
}
#[test]
fn correct_latin1() -> Result<(), core::convert::Infallible> {
let mut display = MockDisplay::new();
Text::new("¡ÿ", Point::zero())
.into_styled(TextStyle::new(Font24x32, BinaryColor::On))
.draw(&mut display)?;
assert_eq!(
display,
MockDisplay::from_pattern(&[
" #### #### #### ",
" #### #### #### ",
" #### #### #### ",
" #### #### #### ",
" ",
" ",
" ",
" ",
" #### #### #### ",
" #### #### #### ",
" #### #### #### ",
" #### #### #### ",
" #### #### #### ",
" #### #### #### ",
" #### #### #### ",
" #### #### #### ",
" #### #### #### ",
" #### #### #### ",
" #### #### #### ",
" #### #### #### ",
" #### ################ ",
" #### ################ ",
" #### ################ ",
" #### ################ ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" ############ ",
" ############ ",
" ############ ",
" ############ ",
])
);
Ok(())
}
#[test]
fn dont_panic() -> Result<(), core::convert::Infallible> {
let two_question_marks = MockDisplay::from_pattern(&[
" ############ ############ ",
" ############ ############ ",
" ############ ############ ",
" ############ ############ ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
"#### #### #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
" ",
" ",
" ",
" ",
" #### #### ",
" #### #### ",
" #### #### ",
" #### #### ",
]);
let style = TextStyle::new(Font24x32, BinaryColor::On);
let mut display = MockDisplay::new();
Text::new("\0\r", Point::zero())
.into_styled(style)
.draw(&mut display)?;
assert_eq!(display, two_question_marks);
let mut display = MockDisplay::new();
Text::new("\x7F\u{A0}", Point::zero())
.into_styled(style)
.draw(&mut display)?;
assert_eq!(display, two_question_marks);
let mut display = MockDisplay::new();
Text::new("Ā💣", Point::zero())
.into_styled(style)
.draw(&mut display)?;
assert_eq!(display, two_question_marks);
Ok(())
}
}