/* * QR Code generator demo (C) * * Run this command-line program with no arguments. The program * computes a demonstration QR Codes and print it to the console. * * 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. */ #include #include #include #include "qrcodegen.h" // Function prototypes static void doBasicDemo(void); static void doVarietyDemo(void); static void printQr(const uint8_t qrcode[], int version); // The main application program. int main(void) { doBasicDemo(); doVarietyDemo(); return EXIT_SUCCESS; } // Creates a single QR Code, then prints it to the console. static void doBasicDemo() { const char *text = "Hello, world!"; // User-supplied text enum qrcodegen_Ecc errCorLvl = qrcodegen_Ecc_LOW; // Error correction level // Make and print the QR Code symbol uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX]; uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX]; int version = qrcodegen_encodeText(text, tempBuffer, qrcode, errCorLvl, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true); if (version != 0) printQr(qrcode, version); } // Creates a variety of QR Codes that exercise different features of the library, and prints each one to the console. static void doVarietyDemo() { { // Project Nayuki URL uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX]; uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX]; int version = qrcodegen_encodeText("https://www.nayuki.io/", tempBuffer, qrcode, qrcodegen_Ecc_HIGH, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_3, true); if (version != 0) printQr(qrcode, version); } { // Numeric mode encoding (3.33 bits per digit) uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX]; uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX]; int version = qrcodegen_encodeText("314159265358979323846264338327950288419716939937510", tempBuffer, qrcode, qrcodegen_Ecc_MEDIUM, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true); if (version != 0) printQr(qrcode, version); } { // Alphanumeric mode encoding (5.5 bits per character) uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX]; uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX]; int version = qrcodegen_encodeText("DOLLAR-AMOUNT:$39.87 PERCENTAGE:100.00% OPERATIONS:+-*/", tempBuffer, qrcode, qrcodegen_Ecc_HIGH, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true); if (version != 0) printQr(qrcode, version); } { // Unicode text as UTF-8, and different masks const char *text = "\xE3\x81\x93\xE3\x82\x93\xE3\x81\xAB\xE3\x81\xA1wa\xE3\x80\x81\xE4\xB8\x96\xE7\x95\x8C\xEF\xBC\x81\x20\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4"; uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX]; uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX]; int version; version = qrcodegen_encodeText(text, tempBuffer, qrcode, qrcodegen_Ecc_QUARTILE, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_0, true); if (version != 0) printQr(qrcode, version); version = qrcodegen_encodeText(text, tempBuffer, qrcode, qrcodegen_Ecc_QUARTILE, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_1, true); if (version != 0) printQr(qrcode, version); version = qrcodegen_encodeText(text, tempBuffer, qrcode, qrcodegen_Ecc_QUARTILE, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_5, true); if (version != 0) printQr(qrcode, version); version = qrcodegen_encodeText(text, tempBuffer, qrcode, qrcodegen_Ecc_QUARTILE, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_7, true); if (version != 0) printQr(qrcode, version); } { // Moderately large QR Code using longer text (from Lewis Carroll's Alice in Wonderland) const char *text = "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."; uint8_t qrcode[qrcodegen_BUFFER_LEN_MAX]; uint8_t tempBuffer[qrcodegen_BUFFER_LEN_MAX]; int version = qrcodegen_encodeText(text, tempBuffer, qrcode, qrcodegen_Ecc_HIGH, qrcodegen_VERSION_MIN, qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true); if (version != 0) printQr(qrcode, version); } } // Prints the given QR Code to the console. static void printQr(const uint8_t qrcode[], int version) { int size = qrcodegen_getSize(version); int border = 4; for (int y = -border; y < size + border; y++) { for (int x = -border; x < size + border; x++) { fputs((qrcodegen_getModule(qrcode, x, y) ? "##" : " "), stdout); } fputs("\n", stdout); } }