Struct Color 

pub struct Color {
    pub red: u8,
    pub green: u8,
    pub blue: u8,
}

Any color (or grayscale) value that this library can make PDF represent.

Fields

red: u8

green: u8

blue: u8

Implementations

impl Color

pub fn rgb(red: u8, green: u8, blue: u8) -> Self

Return a color from a RGB colorspace.

Example

let white = Color::rgb(255, 255, 255);
let black = Color::rgb(0, 0, 0);
let red = Color::rgb(255, 0, 0);
let yellow = Color::rgb(255, 255, 0);

Examples found in repository

examples/circles.rs (line 21)

fn main() {
    let (x, y) = (200.0, 200.0);
    let r = 190.0;
    let sides = 200;
    let angles = (0..sides).map(|n| 2. * PI * n as f32 / sides as f32);

    Pdf::new()
        .add_page(400.0, 400.0)
        .set_color(&Color::rgb(0, 0, 0))
        .set_line_width(2.0)
        .draw_circle(x, y, r)
        .set_color(&Color::rgb(255, 230, 150))
        .set_line_width(1.0)
        .draw_line(angles.map(|phi| (x + r * phi.cos(), y + r * phi.sin())))
        .write_to("circles.pdf")
        .unwrap();
}

pub fn gray(gray: u8) -> Self

Return a grayscale color value.

Example

let white = Color::gray(255);
let gray = Color::gray(128);

Examples found in repository

examples/spectrum.rs (line 12)

fn main() {
    let x: Vec<f32> = (0..4096).map(|n| n as f32 / 4096. * 600.).collect();
    let y: Vec<f32> = x.iter()
        .map(|x| (-(x - 300.0).powi(2) / 1200.0).exp() * 600.0)
        .collect();

    Pdf::new()
        .add_page(600.0, 600.0)
        .set_color(&Color::gray(100))
        .draw_line(x.into_iter().zip(y.into_iter()))
        .write_to("spectrum.pdf")
        .unwrap();
}

examples/slideshow.rs (line 63)

fn main() {
    Slideshow::new(
        1024.0,
        769.0,
        Font::Helvetica,
        Color::gray(0),
        Color::gray(255),
    ).add_title_slide("Lessons from LATHER")
        .add_text_slide("The Activity Problem\nOR\nRemove the spots")
        .add_text_slide(
            "1. Find/make a good model\n2. Run it. A lot.\n3. Listen at group meetings",
        )
        .add_text_slide("Easy to use\nWe're going to write a lot of scripts")
        .add_text_slide("SOAP: 2.4 s\nLATHER: 0.006 s")
        .add_text_slide("All I Really Need to Know I Learned in\nKindergarten")
        .add_text_slide(
            "All I Really Need to Know I Learned in\nMathematical Physics",
        )
        .write_to("lessons_from_lather.pdf")
        .expect("Couldn't save slideshow");
}

examples/mandala.rs (line 21)

fn main() {
    let mut args = env::args().skip(1);
    let n: usize = args.next().map(|s| s.parse().expect("number")).unwrap_or(7);

    let angle = 2.0 * PI / n as f32;
    let r = 99.0;
    let d = 141.4;
    let rr = 36.0;

    let mut document = Pdf::new();
    document
        .add_page(600.0, 600.0)
        .transform(Matrix::translate(300.0, 300.0))
        .set_color(&Color::gray(0));

    for _ in 0..n {
        document
            .draw_line(vec![(0.0, 33.5), (0.0, 250.0)].into_iter())
            .draw_circle(0.0, r, r * 1.25 * angle)
            .draw_circle(0.0, d + rr, rr)
            .transform(Matrix::rotate(angle));
    }
    document.transform(Matrix::rotate(angle / 2.0));
    for _ in 0..n {
        let mut r0 = 58.66;
        let mut r = 0.7705 * r0 * angle;
        for _ in 0..(n + 1) / 3 {
            document.draw_circle(0., r0, r);
            let r2 = 1.058 * r;
            r0 += r + r2;
            r = r2;
        }
        document.transform(Matrix::rotate(angle));
    }

    document.write_to("mandala.pdf").unwrap();
}

Trait Implementations

impl Clone for Color

fn clone(&self) -> Color

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.