drawing_lines.md

Drawing Lines

We can draw lines on an image. First, we create an ImageBuffer. For the purpose of clear demonstration, we make the image has low resolution. Then, we use draw_line_segment_mut to draw a line on the image. The function needs the two end points of the line and the color of it.

use imageproc::{drawing, image};

fn main() {
    let mut buf = image::ImageBuffer::new(100, 100);

    drawing::draw_line_segment_mut(
        &mut buf,
        (0, 10),
        (100, 90),
        image::Rgb::from([128u8, 255u8, 64u8]),
    );
    buf.save("line.png").unwrap();
}

line.png:

Another function to draw a line is by draw_line_segment. Instead of mutating the original image, this function creates a copy of the image and draws on the copy.

➡️ Next: Drawing Antialiased Lines

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