QR Code Generator

This crate provides functions to generate QR Code matrices and images in RAW, PNG and SVG formats.

Examples

Encode any data to a QR Code matrix which is `Vec<Vec<bool>>`.

use qrcode_generator::QrCodeEcc;

let result: Vec<Vec<bool>> = qrcode_generator::to_matrix("Hello world!", QrCodeEcc::Low).unwrap();

println!("{:?}", result);

Encode any data to a PNG image stored in a Vec instance.

use qrcode_generator::QrCodeEcc;

let result: Vec<u8> = qrcode_generator::to_png_to_vec("Hello world!", QrCodeEcc::Low, 1024).unwrap();

println!("{:?}", result);

Encode any data to a PNG image stored in a file.

use qrcode_generator::QrCodeEcc;

qrcode_generator::to_png_to_file("Hello world!", QrCodeEcc::Low, 1024, "tests/data/file_output.png").unwrap();

Encode any data to a SVG image stored in a String instance.

use qrcode_generator::QrCodeEcc;

let result: String = qrcode_generator::to_svg_to_string("Hello world!", QrCodeEcc::Low, 1024, None::<&str>).unwrap();

println!("{:?}", result);

Encode any data to a SVG image stored in a file.

use qrcode_generator::QrCodeEcc;

qrcode_generator::to_svg_to_file("Hello world!", QrCodeEcc::Low, 1024, None::<&str>, "tests/data/file_output.svg").unwrap();

Low-level Usage

Raw Image Data

The to_image and to_image_buffer functions can be used, if you want to modify your image.

Segments

Every to_* function has a corresponding _from_segments function. You can concatenate segments by using different encoding methods, such as numeric, alphanumeric or binary to reduce the size (level) of your QR code matrix/image.

use qrcode_generator::{QrCodeEcc, QrSegment};

let first = "1234567";

let second = "ABCDEFG";

let segments = [QrSegment::make_numeric(&first), QrSegment::make_alphanumeric(&second)];

let result: Vec<Vec<bool>> = qrcode_generator::to_matrix_from_segments(&segments, QrCodeEcc::Low).unwrap();

println!("{:?}", result);

More segments optimization apporaches: magiclen/qrcode-segments-optimizer

Crates.io

https://crates.io/crates/qrcode-generator

Documentation

https://docs.rs/qrcode-generator

License

MIT