1QR Code generator library 2========================= 3 4 5Introduction 6------------ 7 8This project aims to be the best, clearest QR Code generator library. The primary goals are flexible options and absolute correctness. Secondary goals are compact implementation size and good documentation comments. 9 10Home page with live JavaScript demo, extensive descriptions, and competitor comparisons: https://www.nayuki.io/page/qr-code-generator-library 11 12 13Features 14-------- 15 16Core features: 17 18* Available in 6 programming languages, all with nearly equal functionality: Java, TypeScript/JavaScript, Python, Rust, C++, C 19* Significantly shorter code but more documentation comments compared to competing libraries 20* Supports encoding all 40 versions (sizes) and all 4 error correction levels, as per the QR Code Model 2 standard 21* Output format: Raw modules/pixels of the QR symbol 22* Detects finder-like penalty patterns more accurately than other implementations 23* Encodes numeric and special-alphanumeric text in less space than general text 24* Open source code under the permissive MIT License 25 26Manual parameters: 27 28* User can specify minimum and maximum version numbers allowed, then library will automatically choose smallest version in the range that fits the data 29* User can specify mask pattern manually, otherwise library will automatically evaluate all 8 masks and select the optimal one 30* User can specify absolute error correction level, or allow the library to boost it if it doesn't increase the version number 31* User can create a list of data segments manually and add ECI segments 32 33 34Examples 35-------- 36 37 extern crate qrcodegen; 38 use qrcodegen::Mask; 39 use qrcodegen::QrCode; 40 use qrcodegen::QrCodeEcc; 41 use qrcodegen::QrSegment; 42 use qrcodegen::Version; 43 44 // Simple operation 45 let qr = QrCode::encode_text("Hello, world!", 46 QrCodeEcc::Medium).unwrap(); 47 let svg = to_svg_string(&qr, 4); // See qrcodegen-demo 48 49 // Manual operation 50 let chrs: Vec<char> = "3141592653589793238462643383".chars().collect(); 51 let segs = QrSegment::make_segments(&chrs); 52 let qr = QrCode::encode_segments_advanced(&segs, QrCodeEcc::High, 53 Version::new(5), Version::new(5), Some(Mask::new(2)), false).unwrap(); 54 for y in 0 .. qr.size() { 55 for x in 0 .. qr.size() { 56 (... paint qr.get_module(x, y) ...) 57 } 58 } 59 60More complete set of examples: https://github.com/nayuki/QR-Code-generator/blob/master/rust/examples/qrcodegen-demo.rs . 61