schrift-rs/src/test.rs

use super::*;

const FONT_PATH: &'static str = "libschrift/resources/FiraGO-Regular.ttf";

#[test]
fn version_test() {
    assert_eq!(version_info(), "0.10.2");
}

#[test]
fn load_test() {
    let _font = Font::load_from_file(FONT_PATH).unwrap();
}

#[test]
fn lookup_test() {
    let font = Font::load_from_file(FONT_PATH).unwrap();
    let sch = Schrift::build(font).build();
    sch.glyph_lookup('a')
        .expect("couldn't look up lowercase 'a'");
    sch.glyph_lookup('\u{13080}')
        .expect("couldn't look up hieroglyph");
}

#[test]
fn metrics_test() {
    let font = Font::load_from_file(FONT_PATH).unwrap();
    let sch = Schrift::build(font).with_scale(10.0).build();
    let aglyph = sch
        .glyph_lookup('a')
        .expect("couldn't look up lowercase 'a'");
    let agm = sch
        .glyph_metrics(aglyph)
        .expect("couldn't get glyph metrics");
    // check the extracted advance value
    println!("{agm:?}");
    assert!((agm.advance - 5.44).abs() < 1e-8);
}

#[test]
fn render_test() {
    let font = Font::load_from_file(FONT_PATH).unwrap();
    let sch = Schrift::build(font)
        .with_scale(10.0)
        .flag_y_downwards()
        .build();
    let aglyph = sch
        .glyph_lookup('a')
        .expect("couldn't look up lowercase 'a'");

    let mut pxdata = vec![0u8; 256];

    sch.render(aglyph, pxdata.as_mut_slice(), 16, 16).expect("couldn't render lowercase 'a'");

    let mut pgm = String::new();
    pgm.push_str("P2\n16 16\n255\n");
    for y in 0..16 {
        for x in 0..16 {
            pgm.push_str(format!(" {}", pxdata[x + (y * 16)]).as_str());
        }
        pgm.push_str("\n");
    }
    std::fs::write(concat!(env!("OUT_DIR"), "render_test.pgm"), pgm).unwrap();
}