From d4f71e49d7b2cc39973cc63be5a42c7355b151ef Mon Sep 17 00:00:00 2001 From: Project Nayuki Date: Mon, 28 Aug 2017 00:08:44 +0000 Subject: [PATCH] Added a working demo example program in Rust. --- rust/examples/qrcodegen-demo.rs | 166 ++++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 rust/examples/qrcodegen-demo.rs diff --git a/rust/examples/qrcodegen-demo.rs b/rust/examples/qrcodegen-demo.rs new file mode 100644 index 0000000..6752edc --- /dev/null +++ b/rust/examples/qrcodegen-demo.rs @@ -0,0 +1,166 @@ +/* + * QR Code generator demo (Rust) + * + * Run this command-line program with no arguments. The program computes a bunch of demonstration + * QR Codes and prints them to the console. Also, the SVG code for one QR Code is printed as a sample. + * + * Copyright (c) Project Nayuki. (MIT License) + * https://www.nayuki.io/page/qr-code-generator-library + * + * Permission is hereby granted, free of charge, to any person obtaining a copy of + * this software and associated documentation files (the "Software"), to deal in + * the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of + * the Software, and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * - The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * - The Software is provided "as is", without warranty of any kind, express or + * implied, including but not limited to the warranties of merchantability, + * fitness for a particular purpose and noninfringement. In no event shall the + * authors or copyright holders be liable for any claim, damages or other + * liability, whether in an action of contract, tort or otherwise, arising from, + * out of or in connection with the Software or the use or other dealings in the + * Software. + */ + +extern crate qrcodegen; +use qrcodegen::QrCode; +use qrcodegen::QrCodeEcc; +use qrcodegen::QrCodeEcc_LOW; +use qrcodegen::QrCodeEcc_MEDIUM; +use qrcodegen::QrCodeEcc_QUARTILE; +use qrcodegen::QrCodeEcc_HIGH; +use qrcodegen::QrSegment; + + +// The main application program. +fn main() { + do_basic_demo(); + do_variety_demo(); + do_segment_demo(); +} + + +// Creates a single QR Code, then prints it to the console. +fn do_basic_demo() { + let text: &'static str = "Hello, world!"; // User-supplied Unicode text + let errcorlvl: &'static QrCodeEcc = &QrCodeEcc_LOW; // Error correction level + + // Make and print the QR Code symbol + let qr: QrCode = QrCode::encode_text(text, errcorlvl); + print_qr(&qr); + println!("{}", qr.to_svg_string(4)); +} + + +// Creates a variety of QR Codes that exercise different features of the library, and prints each one to the console. +fn do_variety_demo() { + // Project Nayuki URL + let qr = QrCode::encode_text("https://www.nayuki.io/", &QrCodeEcc_HIGH); + let qr = QrCode::remask(&qr, 3); // Change mask, forcing to mask #3 + print_qr(&qr); + + // Numeric mode encoding (3.33 bits per digit) + let qr = QrCode::encode_text("314159265358979323846264338327950288419716939937510", &QrCodeEcc_MEDIUM); + print_qr(&qr); + + // Alphanumeric mode encoding (5.5 bits per character) + let qr = QrCode::encode_text("DOLLAR-AMOUNT:$39.87 PERCENTAGE:100.00% OPERATIONS:+-*/", &QrCodeEcc_HIGH); + print_qr(&qr); + + // Unicode text as UTF-8, and different masks + let qr = QrCode::encode_text("こんにちwa、世界！ αβγδ", &QrCodeEcc_QUARTILE); + print_qr(&QrCode::remask(&qr, 0)); + print_qr(&QrCode::remask(&qr, 1)); + print_qr(&QrCode::remask(&qr, 5)); + print_qr(&QrCode::remask(&qr, 7)); + + // Moderately large QR Code using longer text (from Lewis Carroll's Alice in Wonderland) + let qr = QrCode::encode_text(concat!( + "Alice was beginning to get very tired of sitting by her sister on the bank, ", + "and of having nothing to do: once or twice she had peeped into the book her sister was reading, ", + "but it had no pictures or conversations in it, 'and what is the use of a book,' thought Alice ", + "'without pictures or conversations?' So she was considering in her own mind (as well as she could, ", + "for the hot day made her feel very sleepy and stupid), whether the pleasure of making a ", + "daisy-chain would be worth the trouble of getting up and picking the daisies, when suddenly ", + "a White Rabbit with pink eyes ran close by her."), &QrCodeEcc_HIGH); + print_qr(&qr); +} + + +// Creates QR Codes with manually specified segments for better compactness. +fn do_segment_demo() { + // Illustration "silver" + let silver0 = "THE SQUARE ROOT OF 2 IS 1."; + let silver1 = "41421356237309504880168872420969807856967187537694807317667973799"; + let qr = QrCode::encode_text(&[silver0, silver1].concat(), &QrCodeEcc_LOW); + print_qr(&qr); + + let segs = vec![ + QrSegment::make_alphanumeric(&to_chars(silver0)), + QrSegment::make_numeric(&to_chars(silver1)), + ]; + let qr = QrCode::encode_segments(&segs, &QrCodeEcc_LOW); + print_qr(&qr); + + // Illustration "golden" + let golden0 = "Golden ratio φ = 1."; + let golden1 = "6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911374"; + let golden2 = "......"; + let qr = QrCode::encode_text(&[golden0, golden1, golden2].concat(), &QrCodeEcc_LOW); + print_qr(&qr); + + let segs = vec![ + QrSegment::make_bytes(golden0.as_bytes()), + QrSegment::make_numeric(&to_chars(golden1)), + QrSegment::make_alphanumeric(&to_chars(golden2)), + ]; + let qr = QrCode::encode_segments(&segs, &QrCodeEcc_LOW); + print_qr(&qr); + + // Illustration "Madoka": kanji, kana, Greek, Cyrillic, full-width Latin characters + let madoka = "「魔法少女まどか☆マギカ」って、　ИАИ　ｄｅｓｕ　κα？"; + let qr = QrCode::encode_text(madoka, &QrCodeEcc_LOW); + print_qr(&qr); + + let kanjichars: Vec = vec![ // Kanji mode encoding (13 bits per character) + 0x0035, 0x1002, 0x0FC0, 0x0AED, 0x0AD7, + 0x015C, 0x0147, 0x0129, 0x0059, 0x01BD, + 0x018D, 0x018A, 0x0036, 0x0141, 0x0144, + 0x0001, 0x0000, 0x0249, 0x0240, 0x0249, + 0x0000, 0x0104, 0x0105, 0x0113, 0x0115, + 0x0000, 0x0208, 0x01FF, 0x0008, + ]; + let mut bb: Vec = Vec::new(); + for c in &kanjichars { + qrcodegen::append_bits(&mut bb, *c, 13); + } + let segs = vec![ + QrSegment::new(&qrcodegen::QrSegmentMode_KANJI, kanjichars.len(), bb), + ]; + let qr = QrCode::encode_segments(&segs, &QrCodeEcc_LOW); + print_qr(&qr); +} + + +/*---- Utilities ----*/ + +// Prints the given QrCode object to the console. +fn print_qr(qr: &QrCode) { + let border: i32 = 4; + for y in -border .. qr.size() + border { + for x in -border .. qr.size() + border { + let c: char = if qr.get_module(x, y) { '\u{2588}' } else { ' ' }; + print!("{0}{0}", c); + } + println!(); + } + println!(); +} + + +// Converts the given borrowed string slice to a new character vector. +fn to_chars(text: &str) -> Vec { + text.chars().collect() +}