rlvgl_core/plugins/
qrcode.rs

1//! Generate QR codes as pixel buffers.
2use crate::widget::Color;
3use alloc::vec::Vec;
4use qrcode::{
5    QrCode,
6    types::{Color as QrColor, QrError},
7};
8
9/// Generate a QR code bitmap for the provided data.
10pub fn generate(data: &[u8]) -> Result<(Vec<Color>, u32, u32), QrError> {
11    let code = QrCode::new(data)?;
12    let width = code.width() as u32;
13    let modules = code.into_colors();
14    let mut pixels = Vec::with_capacity((width * width) as usize);
15    for m in modules {
16        match m {
17            QrColor::Dark => pixels.push(Color(0, 0, 0, 255)),
18            QrColor::Light => pixels.push(Color(255, 255, 255, 255)),
19        }
20    }
21    Ok((pixels, width, width))
22}
23
24#[cfg(test)]
25mod tests {
26    use super::*;
27
28    #[test]
29    fn generate_simple_qr() {
30        let (pixels, w, h) = generate(b"hello").unwrap();
31        assert_eq!(w, h);
32        assert_eq!(pixels.len(), (w * h) as usize);
33        assert_eq!(pixels[0], Color(0, 0, 0, 255));
34    }
35}
rlvgl_core/plugins/qrcode.rs

rlvgl_core/plugins/
qrcode.rs
