onefetch_image/
iterm.rs

1use anyhow::Result;
2use base64::{Engine, engine};
3use image::{DynamicImage, imageops::FilterType};
4use rustix::termios::tcgetwinsize;
5use std::env;
6use std::io::Cursor;
7
8pub struct ITermBackend;
9
10impl ITermBackend {
11    pub fn supported() -> bool {
12        let term_program = env::var("TERM_PROGRAM").unwrap_or_else(|_| "".to_string());
13        term_program == "iTerm.app"
14    }
15}
16
17impl super::ImageBackend for ITermBackend {
18    fn add_image(
19        &self,
20        lines: Vec<String>,
21        image: &DynamicImage,
22        _colors: usize,
23    ) -> Result<String> {
24        let tty_size = tcgetwinsize(std::io::stdin())?;
25        let width_ratio = f64::from(tty_size.ws_col) / f64::from(tty_size.ws_xpixel);
26        let height_ratio = f64::from(tty_size.ws_row) / f64::from(tty_size.ws_ypixel);
27
28        // resize image to fit the text height with the Lanczos3 algorithm
29        let image = image.resize(
30            u32::MAX,
31            (lines.len() as f64 / height_ratio) as u32,
32            FilterType::Lanczos3,
33        );
34        let _image_columns = width_ratio * f64::from(image.width());
35        let image_rows = height_ratio * f64::from(image.height());
36
37        let mut bytes: Vec<u8> = Vec::new();
38        image.write_to(&mut Cursor::new(&mut bytes), image::ImageFormat::Png)?;
39        let encoded_image = engine::general_purpose::STANDARD.encode(bytes);
40        let mut image_data = Vec::<u8>::new();
41
42        image_data.extend(b"\x1B]1337;File=inline=1:");
43        image_data.extend(encoded_image.bytes());
44        image_data.extend(b"\x07");
45
46        image_data.extend(format!("\x1B[{}A", image_rows as u32 - 1).as_bytes()); // move cursor to start of image
47        let mut i = 0;
48        for line in &lines {
49            image_data.extend(format!("\x1B[s{line}\x1B[u\x1B[1B").as_bytes());
50            i += 1;
51        }
52        image_data
53            .extend(format!("\n\x1B[{}B", lines.len().max(image_rows as usize) - i).as_bytes()); // move cursor to end of image
54
55        Ok(String::from_utf8(image_data)?)
56    }
57}
onefetch_image/iterm.rs

onefetch_image/
iterm.rs
