You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: screenshot.rs
    path of file: ./repos/rustdesk/libs/scrap/examples
    
    the code of the file until where you have to start completion: extern crate repng;
extern crate scrap;

use std::fs::File;
use std::io::ErrorKind::WouldBlock;
use std::thread;
use std::time::Duration;

use scrap::{Capturer, Display, Frame, TraitCapturer, TraitPixelBuffer};

fn main() {
    let n = Display::all().unwrap().len();
    for i in 0..n {
        record(i);
    }
}

fn get_display(i: usize) -> Display {
    Display::all().unwrap().remove(i)
}

fn record(i: usize) {
    let one_second = Duration::new(1, 0);
    let one_frame = one_second / 60;

    for d in Display::all().unwrap() {
        println!("{:?} {} {}", d.origin(), d.width(), d.height());
    }

    let display = get_display(i);
    let mut capturer = Capturer::new(display).expect("Couldn't begin capture.");
    let (w, h) = (capturer.width(), capturer.height());

    loop {
        // Wait until there's a frame.

        let frame = match capturer.frame(Duration::from_millis(0)) {
            Ok(frame) => frame,
            Err(error) => {
                if error.kind() == WouldBlock {
                    // Keep spinning.
                    thread::sleep(one_frame);
                    continue;
                } else {
                    panic!("Error: {}", error);
                }
            }
        };
        let Frame::PixelBuffer(frame) = frame else {
            return;
        };
        let buffer = frame.data();
        println!("Captured data len: {}, Saving...", buffer.len());

        // Flip the BGRA image into a RGBA image.

        let mut bitflipped = Vec::with_capacity(w * h * 4);
        let stride = buffer.len() / h;

        for y in 0..h {
            for x in 0..w {
                let i
    
fn record(i: usize) {
    let one_second = Duration::new(1, 0);
    let one_frame = one_second / 60;

    for d in Display::all().unwrap() {
        println!("{:?} {} {}", d.origin(), d.width(), d.height());
    }

    let display = get_display(i);
    let mut capturer = Capturer::new(display).expect("Couldn't begin capture.");
    let (w, h) = (capturer.width(), capturer.height());

    loop {
        // Wait until there's a frame.

        let frame = match capturer.frame(Duration::from_millis(0)) {
            Ok(frame) => frame,
            Err(error) => {
                if error.kind() == WouldBlock {
                    // Keep spinning.
                    thread::sleep(one_frame);
                    continue;
                } else {
                    panic!("Error: {}", error);
                }
            }
        };
        let Frame::PixelBuffer(frame) = frame else {
            return;
        };
        let buffer = frame.data();
        println!("Captured data len: {}, Saving...", buffer.len());

        // Flip the BGRA image into a RGBA image.

        let mut bitflipped = Vec::with_capacity(w * h * 4);
        let stride = buffer.len() / h;

        for y in 0..h {
            for x in 0..w {
                let i = stride * y + 4 * x;
                bitflipped.extend_from_slice(&[buffer[i + 2], buffer[i + 1], buffer[i], 255]);
            }
        }

        // Save the image.

        let name = format!("screenshot{}_1.png", i);
        repng::encode(
            File::create(name.clone()).unwrap(),
            w as u32,
            h as u32,
            &bitflipped,
        )
        .unwrap();

        println!("Image saved to `{}`.", name);
        break;
    }

    drop(capturer);
    let display = get_display(i);
    let mut capturer = Capturer::new(display).expect("Couldn't begin capture.");
    let (w, h) = (capturer.width(), capturer.height());

    loop {
        // Wait until there's a frame.

        let frame = match capturer.frame(Duration::from_millis(0)) {
            Ok(frame) => frame,
            Err(error) => {
                if error.kind() == WouldBlock {
                    // Keep spinning.
                    thread::sleep(one_frame);
                    continue;
                } else {
                    panic!("Error: {}", error);
                }
            }
        };
        let Frame::PixelBuffer(frame) = frame else {
            return;
        };
        let buffer = frame.data();
        println!("Captured data len: {}, Saving...", buffer.len());

        let mut raw = Vec::new();
        unsafe {
            scrap::ARGBToRAW(
                buffer.as_ptr(),
                frame.stride()[0] as _,
                (&mut raw).as_mut_ptr(),
                (w * 3) as _,
                w as _,
                h as _,
            )
        };

        let mut bitflipped = Vec::with_capacity(w * h * 4);
        let stride = raw.len() / h;

        for y in 0..h {
            for x in 0..w {
                let i = stride * y + 3 * x;
                bitflipped.extend_from_slice(&[raw[i], raw[i + 1], raw[i + 2], 255]);
            }
        }
        let name = format!("screenshot{}_2.png", i);
        repng::encode(
            File::create(name.clone()).unwrap(),
            w as u32,
            h as u32,
            &bitflipped,
        )
        .unwrap();

        println!("Image saved to `{}`.", name);
        break;
    }
}