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201 lines
8.1 KiB
201 lines
8.1 KiB
/*
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* QR Code generator demo (C++)
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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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#include <cstdint>
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#include <cstdlib>
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#include <cstring>
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#include <iostream>
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#include <string>
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#include <vector>
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#include "BitBuffer.hpp"
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#include "QrCode.hpp"
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using std::uint8_t;
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using qrcodegen::QrCode;
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using qrcodegen::QrSegment;
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// Function prototypes
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static void doBasicDemo();
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static void doVarietyDemo();
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static void doSegmentDemo();
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static void doMaskDemo();
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static void printQr(const QrCode &qr);
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// The main application program.
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int main() {
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doBasicDemo();
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doVarietyDemo();
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doSegmentDemo();
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doMaskDemo();
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return EXIT_SUCCESS;
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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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static void doBasicDemo() {
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const char *text = "Hello, world!"; // User-supplied text
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const QrCode::Ecc errCorLvl = QrCode::Ecc::LOW; // Error correction level
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// Make and print the QR Code symbol
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const QrCode qr = QrCode::encodeText(text, errCorLvl);
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printQr(qr);
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std::cout << qr.toSvgString(4) << std::endl;
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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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static void doVarietyDemo() {
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// Numeric mode encoding (3.33 bits per digit)
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const QrCode qr0 = QrCode::encodeText("314159265358979323846264338327950288419716939937510", QrCode::Ecc::MEDIUM);
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printQr(qr0);
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// Alphanumeric mode encoding (5.5 bits per character)
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const QrCode qr1 = QrCode::encodeText("DOLLAR-AMOUNT:$39.87 PERCENTAGE:100.00% OPERATIONS:+-*/", QrCode::Ecc::HIGH);
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printQr(qr1);
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// Unicode text as UTF-8
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const QrCode qr2 = QrCode::encodeText("\xE3\x81\x93\xE3\x82\x93\xE3\x81\xAB\xE3\x81\xA1wa\xE3\x80\x81"
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"\xE4\xB8\x96\xE7\x95\x8C\xEF\xBC\x81\x20\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4", QrCode::Ecc::QUARTILE);
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printQr(qr2);
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// Moderately large QR Code using longer text (from Lewis Carroll's Alice in Wonderland)
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const QrCode qr3 = QrCode::encodeText(
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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.", QrCode::Ecc::HIGH);
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printQr(qr3);
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}
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// Creates QR Codes with manually specified segments for better compactness.
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static void doSegmentDemo() {
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// Illustration "silver"
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const char *silver0 = "THE SQUARE ROOT OF 2 IS 1.";
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const char *silver1 = "41421356237309504880168872420969807856967187537694807317667973799";
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const QrCode qr0 = QrCode::encodeText(
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(std::string(silver0) + silver1).c_str(),
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QrCode::Ecc::LOW);
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printQr(qr0);
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const QrCode qr1 = QrCode::encodeSegments(
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{QrSegment::makeAlphanumeric(silver0), QrSegment::makeNumeric(silver1)},
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QrCode::Ecc::LOW);
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printQr(qr1);
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// Illustration "golden"
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const char *golden0 = "Golden ratio \xCF\x86 = 1.";
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const char *golden1 = "6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911374";
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const char *golden2 = "......";
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const QrCode qr2 = QrCode::encodeText(
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(std::string(golden0) + golden1 + golden2).c_str(),
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QrCode::Ecc::LOW);
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printQr(qr2);
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std::vector<uint8_t> bytes(golden0, golden0 + std::strlen(golden0));
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const QrCode qr3 = QrCode::encodeSegments(
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{QrSegment::makeBytes(bytes), QrSegment::makeNumeric(golden1), QrSegment::makeAlphanumeric(golden2)},
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QrCode::Ecc::LOW);
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printQr(qr3);
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// Illustration "Madoka": kanji, kana, Cyrillic, full-width Latin, Greek characters
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const char *madoka = // Encoded in UTF-8
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"\xE3\x80\x8C\xE9\xAD\x94\xE6\xB3\x95\xE5"
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"\xB0\x91\xE5\xA5\xB3\xE3\x81\xBE\xE3\x81"
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"\xA9\xE3\x81\x8B\xE2\x98\x86\xE3\x83\x9E"
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"\xE3\x82\xAE\xE3\x82\xAB\xE3\x80\x8D\xE3"
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"\x81\xA3\xE3\x81\xA6\xE3\x80\x81\xE3\x80"
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"\x80\xD0\x98\xD0\x90\xD0\x98\xE3\x80\x80"
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"\xEF\xBD\x84\xEF\xBD\x85\xEF\xBD\x93\xEF"
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"\xBD\x95\xE3\x80\x80\xCE\xBA\xCE\xB1\xEF"
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"\xBC\x9F";
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const QrCode qr4 = QrCode::encodeText(madoka, QrCode::Ecc::LOW);
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printQr(qr4);
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const std::vector<int> kanjiChars{ // 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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qrcodegen::BitBuffer bb;
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for (int c : kanjiChars)
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bb.appendBits(c, 13);
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const QrCode qr5 = QrCode::encodeSegments(
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{QrSegment(QrSegment::Mode::KANJI, kanjiChars.size(), bb)},
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QrCode::Ecc::LOW);
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printQr(qr5);
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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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static void doMaskDemo() {
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// Project Nayuki URL
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std::vector<QrSegment> segs0 = QrSegment::makeSegments("https://www.nayuki.io/");
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printQr(QrCode::encodeSegments(segs0, QrCode::Ecc::HIGH, QrCode::MIN_VERSION, QrCode::MAX_VERSION, -1, true)); // Automatic mask
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printQr(QrCode::encodeSegments(segs0, QrCode::Ecc::HIGH, QrCode::MIN_VERSION, QrCode::MAX_VERSION, 3, true)); // Force mask 3
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// Chinese text as UTF-8
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std::vector<QrSegment> segs1 = QrSegment::makeSegments(
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"\xE7\xB6\xAD\xE5\x9F\xBA\xE7\x99\xBE\xE7\xA7\x91\xEF\xBC\x88\x57\x69\x6B\x69\x70"
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"\x65\x64\x69\x61\xEF\xBC\x8C\xE8\x81\x86\xE8\x81\xBD\x69\x2F\xCB\x8C\x77\xC9\xAA"
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"\x6B\xE1\xB5\xBB\xCB\x88\x70\x69\xCB\x90\x64\x69\x2E\xC9\x99\x2F\xEF\xBC\x89\xE6"
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"\x98\xAF\xE4\xB8\x80\xE5\x80\x8B\xE8\x87\xAA\xE7\x94\xB1\xE5\x85\xA7\xE5\xAE\xB9"
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"\xE3\x80\x81\xE5\x85\xAC\xE9\x96\x8B\xE7\xB7\xA8\xE8\xBC\xAF\xE4\xB8\x94\xE5\xA4"
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"\x9A\xE8\xAA\x9E\xE8\xA8\x80\xE7\x9A\x84\xE7\xB6\xB2\xE8\xB7\xAF\xE7\x99\xBE\xE7"
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"\xA7\x91\xE5\x85\xA8\xE6\x9B\xB8\xE5\x8D\x94\xE4\xBD\x9C\xE8\xA8\x88\xE7\x95\xAB");
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printQr(QrCode::encodeSegments(segs1, QrCode::Ecc::MEDIUM, QrCode::MIN_VERSION, QrCode::MAX_VERSION, 0, true)); // Force mask 0
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printQr(QrCode::encodeSegments(segs1, QrCode::Ecc::MEDIUM, QrCode::MIN_VERSION, QrCode::MAX_VERSION, 1, true)); // Force mask 1
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printQr(QrCode::encodeSegments(segs1, QrCode::Ecc::MEDIUM, QrCode::MIN_VERSION, QrCode::MAX_VERSION, 5, true)); // Force mask 5
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printQr(QrCode::encodeSegments(segs1, QrCode::Ecc::MEDIUM, QrCode::MIN_VERSION, QrCode::MAX_VERSION, 7, true)); // Force mask 7
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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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static void printQr(const QrCode &qr) {
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int border = 4;
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for (int y = -border; y < qr.getSize() + border; y++) {
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for (int x = -border; x < qr.getSize() + border; x++) {
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std::cout << (qr.getModule(x, y) ? "##" : " ");
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}
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std::cout << std::endl;
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}
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std::cout << std::endl;
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}
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