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Lower QR error correction if needed when creating #119

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Merged
Bownairo merged 1 commit into from
Feb 18, 2026
Merged

Lower QR error correction if needed when creating #119

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11 changes: 9 additions & 2 deletions src/offline.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -69,7 +69,7 @@ pub fn output_message(json: String, format: &OfflineOutput) -> Result<()> {
Engine,
};
use libflate::gzip;
use qrcode::{render::unicode, QrCode};
use qrcode::{render::unicode, types::QrError, EcLevel, QrCode};
use std::io::Write;
eprintln!("json length: {}", json.len());
let mut encoder = gzip::Encoder::new(Vec::new())?;
Expand All @@ -86,7 +86,14 @@ pub fn output_message(json: String, format: &OfflineOutput) -> Result<()> {
OfflineOutput::Ascii(url) | OfflineOutput::Png(url) => url.to_owned() + &base64,
_ => base64,
};
let code = QrCode::new(msg)?;
let code = QrCode::new(&msg).or_else(|e| {
// Try to lower the error correction level to make the data fit.
if let QrError::DataTooLong = e {
QrCode::with_error_correction_level(&msg, EcLevel::L)
} else {
Err(e)
}
})?;
match format {
OfflineOutput::Ascii(_) | OfflineOutput::AsciiNoUrl => {
let img = code.render::<unicode::Dense1x2>().build();
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