185 lines
7.4 KiB
Rust
185 lines
7.4 KiB
Rust
/*
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* QR Code generator demo (Rust)
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*
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* Run this command-line program with no arguments. The program computes a bunch of demonstration
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* QR Codes and prints them to the console. Also, the SVG code for one QR Code is printed as a sample.
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*
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* Copyright (c) Project Nayuki. (MIT License)
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* https://www.nayuki.io/page/qr-code-generator-library
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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* - The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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* - The Software is provided "as is", without warranty of any kind, express or
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* implied, including but not limited to the warranties of merchantability,
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* fitness for a particular purpose and noninfringement. In no event shall the
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* authors or copyright holders be liable for any claim, damages or other
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* liability, whether in an action of contract, tort or otherwise, arising from,
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* out of or in connection with the Software or the use or other dealings in the
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* Software.
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*/
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extern crate qrcodegen;
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use qrcodegen::Mask;
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use qrcodegen::QrCode;
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use qrcodegen::QrCodeEcc;
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use qrcodegen::QrSegment;
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use qrcodegen::QrCode_MAX_VERSION;
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use qrcodegen::QrCode_MIN_VERSION;
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// The main application program.
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fn main() {
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do_basic_demo();
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do_variety_demo();
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do_segment_demo();
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do_mask_demo();
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}
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/*---- Demo suite ----*/
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// Creates a single QR Code, then prints it to the console.
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fn do_basic_demo() {
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let text: &'static str = "Hello, world!"; // User-supplied Unicode text
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let errcorlvl: QrCodeEcc = QrCodeEcc::Low; // Error correction level
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// Make and print the QR Code symbol
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let qr: QrCode = QrCode::encode_text(text, errcorlvl).unwrap();
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print_qr(&qr);
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println!("{}", qr.to_svg_string(4));
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}
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// Creates a variety of QR Codes that exercise different features of the library, and prints each one to the console.
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fn do_variety_demo() {
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// Numeric mode encoding (3.33 bits per digit)
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let qr = QrCode::encode_text("314159265358979323846264338327950288419716939937510", QrCodeEcc::Medium).unwrap();
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print_qr(&qr);
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// Alphanumeric mode encoding (5.5 bits per character)
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let qr = QrCode::encode_text("DOLLAR-AMOUNT:$39.87 PERCENTAGE:100.00% OPERATIONS:+-*/", QrCodeEcc::High).unwrap();
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print_qr(&qr);
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// Unicode text as UTF-8
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let qr = QrCode::encode_text("こんにちwa、世界！ αβγδ", QrCodeEcc::Quartile).unwrap();
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print_qr(&qr);
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// Moderately large QR Code using longer text (from Lewis Carroll's Alice in Wonderland)
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let qr = QrCode::encode_text(concat!(
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"Alice was beginning to get very tired of sitting by her sister on the bank, ",
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"and of having nothing to do: once or twice she had peeped into the book her sister was reading, ",
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"but it had no pictures or conversations in it, 'and what is the use of a book,' thought Alice ",
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"'without pictures or conversations?' So she was considering in her own mind (as well as she could, ",
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"for the hot day made her feel very sleepy and stupid), whether the pleasure of making a ",
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"daisy-chain would be worth the trouble of getting up and picking the daisies, when suddenly ",
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"a White Rabbit with pink eyes ran close by her."), QrCodeEcc::High).unwrap();
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print_qr(&qr);
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}
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// Creates QR Codes with manually specified segments for better compactness.
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fn do_segment_demo() {
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// Illustration "silver"
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let silver0 = "THE SQUARE ROOT OF 2 IS 1.";
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let silver1 = "41421356237309504880168872420969807856967187537694807317667973799";
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let qr = QrCode::encode_text(&[silver0, silver1].concat(), QrCodeEcc::Low).unwrap();
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print_qr(&qr);
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let segs = vec![
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QrSegment::make_alphanumeric(&to_chars(silver0)),
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QrSegment::make_numeric(&to_chars(silver1)),
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];
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let qr = QrCode::encode_segments(&segs, QrCodeEcc::Low).unwrap();
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print_qr(&qr);
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// Illustration "golden"
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let golden0 = "Golden ratio φ = 1.";
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let golden1 = "6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911374";
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let golden2 = "......";
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let qr = QrCode::encode_text(&[golden0, golden1, golden2].concat(), QrCodeEcc::Low).unwrap();
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print_qr(&qr);
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let segs = vec![
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QrSegment::make_bytes(golden0.as_bytes()),
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QrSegment::make_numeric(&to_chars(golden1)),
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QrSegment::make_alphanumeric(&to_chars(golden2)),
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];
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let qr = QrCode::encode_segments(&segs, QrCodeEcc::Low).unwrap();
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print_qr(&qr);
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// Illustration "Madoka": kanji, kana, Greek, Cyrillic, full-width Latin characters
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let madoka = "「魔法少女まどか☆マギカ」って、 ИАИ ｄｅｓｕ κα？";
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let qr = QrCode::encode_text(madoka, QrCodeEcc::Low).unwrap();
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print_qr(&qr);
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let kanjichars: Vec<u32> = vec![ // Kanji mode encoding (13 bits per character)
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0x0035, 0x1002, 0x0FC0, 0x0AED, 0x0AD7,
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0x015C, 0x0147, 0x0129, 0x0059, 0x01BD,
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0x018D, 0x018A, 0x0036, 0x0141, 0x0144,
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0x0001, 0x0000, 0x0249, 0x0240, 0x0249,
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0x0000, 0x0104, 0x0105, 0x0113, 0x0115,
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0x0000, 0x0208, 0x01FF, 0x0008,
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];
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let mut bb = qrcodegen::BitBuffer(Vec::new());
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for c in &kanjichars {
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bb.append_bits(*c, 13);
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}
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let segs = vec![
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QrSegment::new(qrcodegen::QrSegmentMode::Kanji, kanjichars.len(), bb.0),
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];
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let qr = QrCode::encode_segments(&segs, QrCodeEcc::Low).unwrap();
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print_qr(&qr);
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}
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// Creates QR Codes with the same size and contents but different mask patterns.
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fn do_mask_demo() {
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// Project Nayuki URL
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let segs = QrSegment::make_segments(&to_chars("https://www.nayuki.io/"));
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let qr = QrCode::encode_segments_advanced(&segs, QrCodeEcc::High, QrCode_MIN_VERSION, QrCode_MAX_VERSION, None, true).unwrap(); // Automatic mask
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print_qr(&qr);
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let qr = QrCode::encode_segments_advanced(&segs, QrCodeEcc::High, QrCode_MIN_VERSION, QrCode_MAX_VERSION, Some(Mask::new(3)), true).unwrap(); // Force mask 3
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print_qr(&qr);
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// Chinese text as UTF-8
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let segs = QrSegment::make_segments(&to_chars("維基百科（Wikipedia，聆聽i/ˌwɪkᵻˈpiːdi.ə/）是一個自由內容、公開編輯且多語言的網路百科全書協作計畫"));
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let qr = QrCode::encode_segments_advanced(&segs, QrCodeEcc::Medium, QrCode_MIN_VERSION, QrCode_MAX_VERSION, Some(Mask::new(0)), true).unwrap(); // Force mask 0
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print_qr(&qr);
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let qr = QrCode::encode_segments_advanced(&segs, QrCodeEcc::Medium, QrCode_MIN_VERSION, QrCode_MAX_VERSION, Some(Mask::new(1)), true).unwrap(); // Force mask 1
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print_qr(&qr);
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let qr = QrCode::encode_segments_advanced(&segs, QrCodeEcc::Medium, QrCode_MIN_VERSION, QrCode_MAX_VERSION, Some(Mask::new(5)), true).unwrap(); // Force mask 5
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print_qr(&qr);
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let qr = QrCode::encode_segments_advanced(&segs, QrCodeEcc::Medium, QrCode_MIN_VERSION, QrCode_MAX_VERSION, Some(Mask::new(7)), true).unwrap(); // Force mask 7
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print_qr(&qr);
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}
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/*---- Utilities ----*/
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// Prints the given QrCode object to the console.
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fn print_qr(qr: &QrCode) {
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let border: i32 = 4;
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for y in -border .. qr.size() + border {
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for x in -border .. qr.size() + border {
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let c: char = if qr.get_module(x, y) { '█' } else { ' ' };
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print!("{0}{0}", c);
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}
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println!();
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}
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println!();
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}
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// Converts the given borrowed string slice to a new character vector.
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fn to_chars(text: &str) -> Vec<char> {
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text.chars().collect()
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}
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