qr.html/qr-zip.html at main · six-two/qr.html · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- Make sure that no communication with external sites is possible -->
    <meta http-equiv="Content-Security-Policy" content="default-src 'none'; script-src 'unsafe-inline'; style-src 'unsafe-inline'; img-src data:;">
    <title>ZIP QR code generator</title>
    <script>
        console.log("ZIP QR code generator by github.com/six-two - Version 2025-02-09 - Nayuki Engine")
        const get_or_default_int = (name, default_value) => {
            const stored = localStorage.getItem(name);
            if (stored != null) {
                try {
                    return parseInt(stored);
                } catch (error) {
                    console.warn(`Failed to parse stored entry for '${name}'`);
                }
            }
            return default_value;
        }

        // ================== Start of user settings ==================
        // You can modify these settings without breaking stuff

        // Thanks to @d3xbot for providing the numbers
        // ERROR_CORRECTION_LEVEL L – up to 7% damage - MAX_BYTES: 2953
        // ERROR_CORRECTION_LEVEL M – up to 15% damage - MAX_BYTES: 2331
        // ERROR_CORRECTION_LEVEL Q – up to 25% damage - MAX_BYTES: 1663
        // ERROR_CORRECTION_LEVEL H – up to 30% damage - MAX_BYTES: 1273
        let ERROR_CORRECTION_LEVEL = localStorage.getItem("ERROR_CORRECTION_LEVEL") || "L";

        // Allow users to enable the clipboard monitoring function. Set this to false to hide the checkbox
        let SHOW_CLIPBOARD_MONITORING_CONTROLS = true;

        // Size of the QR code in pixels. Set it to 0 to automatically fit the free space
        let QR_MIN_SIZE = get_or_default_int("QR_MIN_SIZE", 30); //in pixels
        let QR_MAX_SIZE = get_or_default_int("QR_MAX_SIZE", Infinity); // in pixels

        // If you want a border around the QR code (that will stay when you right click -> "Save image as..." the image, set this to something greater than zero)
        let QR_BORDER_SIZE = get_or_default_int("QR_BORDER_SIZE", 0); // in pixels
        let QR_BORDER_COLOR = localStorage.getItem("QR_BORDER_COLOR") || "#909090"; // standard html color codes

        // Specify whether you want to use PNG or SVG as your download format.
        // Defaults to PNG, since it is smaller. You can run 'localStorage.setItem("USE_PNG_DOWNLOAD", "false"); location.reload()' in your console to chenge it to SVG
        let USE_PNG_DOWNLOAD = (localStorage.getItem("USE_PNG_DOWNLOAD") || "true") == "true"; // true -> .png download, false -> .svg download

        let ZIP_LEVEL = 9;
        // =================== End of user settings ===================
    </script>

    <style>
        * {
            box-sizing: border-box;
        }

        body {
            width: 100vw;
            height: 100vh;
            max-height: 100vh;
            margin: 0px;
            padding: 0px;
            display: flex;
            flex-direction: column;
            background-color: lightgray;
            overflow: hidden;
        }

        header {
            width: 100%;
            min-height: 40px;
            background-color: #444;
            color: lightgray;
            display: flex;
            font-size: 25px;
            padding: 5px;
        }

        header a, header .button {
            color: lightgray;
            margin-right: 20px;
        }

        header .button {
            cursor: pointer;
            text-decoration: underline
        }

        .expand {
            flex: 1;
        }

        #text-and-qr {
            flex: 1;
            display: flex;
            flex-direction: column;
            padding: 5px;
        }

        #input-div {
            min-height: 100px;
            min-width: 200px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        #input {
            width: 100%;
            height: 100%;
            flex: 1;
            resize: none;
        }

        #input-error {
            margin-bottom: 10px;
            display: none;
        }

        .error {
            width: 100%;
            background-color: rgb(255, 140, 140);
            border: 2px solid red;
            border-radius: 10px;
            padding: 5px;
        }

        #qrcode {
            width: 100%;
            height: 100%;
            padding: 5px;
        }

        #qrcode canvas {
            margin: auto;
            display: block;
        }
    </style>
</head>
<body>
    <header id="header">
        <div class="title" title="Version 2025-02-07">Offline QR code generator</div>
        <div class="expand"></div>

        <div id="monitor-clipboard" class="button"></div>
        <a id="download" href="" download>Download</a>
        <a href="https://github.com/six-two/qr.html" target="_blank" rel="noopener noreferrer">Source code</a>
    </header>
    <div id="text-and-qr">
        <div id="input-div">
            <div id="input-error" class="error"></div>
            <textarea id="input" name="input" placeholder="Type the data you want to convert to a QR code here. Alternatively you can try to drag and drop or copy-paste a file in this text box, but not all browsers/operating systems support that." id="" autofocus>This QR code generator first ZIPs your text and then puts it in a binary QR code. This allows you to put more data into an QR code, but the code can not be read by normal tools like smartphones anymore. Instead you need to extract the data from the QR code into a file, name it `something.zip`, double click to extract it and look at the contained `qr.txt` file to see the contents.

Luckily this process can be automated on most operating systems using terminal commands.
On macOS, you can use zbarimg and bsdtar:

$ brew install zbar
$ zbarimg -q --raw -Sbinary path/to/qr_code.png | bsdtar -xOf -

On Linux you can use zbarimg and bsdtar too. The following works on Kali Linux (and likely most Debian Linux distros):

$ sudo apt install libarchive-tools zbar-tools
$ zbarimg -q --raw -Sbinary path/to/qr_code.png | bsdtar -xOf -

</textarea>
        </div>
        <div id="qrcode"><div class="error">You need to enable JavaScript to use this page</div></div>
    </div>

<script type="text/javascript">
    const header = document.getElementById("header");
    const qrcode = document.getElementById("qrcode");
    const input_area = document.getElementById("input");
    const input_error = document.getElementById("input-error");
    const text_and_qr = document.getElementById("text-and-qr");
    window.zip_cache = {};

    let ecc_level = "TODO";

    window.addEventListener("load", () => {
        // This needs to be done after loading the library
        setEccLevel(ERROR_CORRECTION_LEVEL);
    })

    const onHashUpdate = () => {
        if (location.hash.length > 1) {
            let initial_value = location.hash.slice(1); // remove leading '#'
            initial_value = decodeURIComponent(initial_value); // URL encoded because of special characters
            console.log("Using initial value from URL hash:", initial_value);
            input_area.value = initial_value;
        }
    }

    // You can set the initial value of the page via the # after the URL. This enables stuff like links and bookmarks for common values
    // we use the hash instead of an URL parameter, since the hash is never sent to a server -> better privacy (only relevant if you use the hosted version)
    onHashUpdate();
    // If the user changes the hash, we should update the text box with it
    window.addEventListener("hashchange", onHashUpdate);

    const PADDING = 10; // 5px on any side for the text-and-qr element -> always 10px in total

    const showInputError = (message) => {
        // message is untrusted input, so we should escape it properly
        if (message) {
            input_error.innerHTML = ""; // remove current children
            const messageElement = document.createTextNode(message);
            input_error.appendChild(messageElement);
            input_error.style.display = "block";
        } else {
            input_error.style.display = "none";
        }
    }

    const showQrCodeGenerationError = (message) => {
        // Bad practice, but XSS should not be possible
        qrcode.innerHTML = `<div class="error"><b>QR code generation failed:</b><br>${message}</div>`;
    }

    const updateQRCode = () => {
        const max_size_fit_window = Math.min(qrcode.clientWidth, qrcode.clientHeight, QR_MAX_SIZE);
        const qr_size = Math.max(QR_MIN_SIZE, max_size_fit_window) - 10; // remove 2 * 5px for the paddings
        const text = input_area.value;

        if (!text) {
            showQrCodeGenerationError("You need to type some text in the input area! It will then be rendered as a QR code.");
            return
        }

        // first try to look it up in the cache, so that the QR code does not change (zip is not stable) and so that we save some computation
        let text_zipped = window.zip_cache[text];
        if (!text_zipped) {
            try {
                text_zipped = fflate.zipSync(
                    { "qr.txt": fflate.strToU8(text) },
                    { level: ZIP_LEVEL }
                );
                // for now only cache the last value to save RAM
                window.zip_cache[text] = text_zipped;
                console.log(`Original text is ${text.length} bytes. Compressed is ${text_zipped.length} bytes.`);
            } catch (err) {
                showQrCodeGenerationError(`Error during zipping of data (should not happen): ${err}`)
                return
            }
        }

        try {
            window.qr_code_object = qrcodegen.QrCode.encodeBinary(text_zipped, ecc_level);
            window.qr_code_svg = toSvgString(qr_code_object, QR_BORDER_SIZE, "white", "black");
            qrcode.innerHTML = window.qr_code_svg;
        } catch (error) {
            window.qr_code_svg = null;
            window.qr_code_object = null;

            showQrCodeGenerationError(`Failed to generate the QR code! Your compressed text is ${text_zipped.length} bytes. The uncompressed text was ${text.length} characters. Please try a shorter text, the compressed text can be at most 2953 bytes long.`);
        }
    };

    const setEccLevel = (eccLevelString) => {
        const ECC_MAP = {
            "L": qrcodegen.QrCode.Ecc.LOW,
            "M": qrcodegen.QrCode.Ecc.MEDIUM,
            "Q": qrcodegen.QrCode.Ecc.QUARTILE,
            "H": qrcodegen.QrCode.Ecc.HIGH,
        }
        try {
            ecc_level = ECC_MAP[eccLevelString];
        } catch {
            console.warn(`Unknown error correction level '${eccLevelString}', defaulting to 'L' (low)`);
            ecc_level = qrcodegen.QrCode.Ecc.LOW;
        }
    }

    const fixByCuttingTextOfAfterQrCodeMaximumSize = () => {
        input_area.value = getMaxQrCodeString(input_area.value, ecc_level);
    }

    const tryFixByConvertingToAlphaNum = () => {
        input_area.value = unicodeToAlphanumericOnly(input_area.value);
    }

    const unicodeToAlphanumericOnly = (string) => {
        // Convert all whitespace to spaces
        string = string.replaceAll("\t", "    ").replaceAll(/\s/g, " ");

        // This rewrites the unicode so that ä becomes a + a diacritic mark. Later on we can drop the diacritic. This way we convert it to the nearest unicode character
        string = string.normalize("NFD");

        // The alphanumeric charset allows only uppercase characters, so we convert all lowercase ones
        string = string.toUpperCase();

        // Finally we drop all not allowed characters (or replace them with a place holder like '.'?)
        string = string.replaceAll(/[^A-Z0-9 $%*+.\/:-]+/g, "");

        return string;
    }
    window.test = unicodeToAlphanumericOnly;

    const getMaxQrCodeLength = (character, ecc_level) => {
        const string = character.repeat(7089); // From https://en.wikipedia.org/wiki/QR_code#Information_capacity -> maximum numeric only value
        return getMaxQrCodeString(string, ecc_level).length;
    }

    const getMaxQrCodeString = (string_to_try_to_use, ecc_level) => {
        try {
            // First check whether the whole string fits
            qrcodegen.QrCode.encodeText(string_to_try_to_use, ecc_level);
            return string_to_try_to_use
        } catch {
            // If not, binary search for the cutof point
            let min = 0;
            let max = string_to_try_to_use.length;
            while (min < max) {
                const middle = Math.ceil((min + max) / 2);
                try {
                    qrcodegen.QrCode.encodeText(string_to_try_to_use.slice(0, middle), ecc_level);
                    // QR code generation worked -> set minimum to this size
                    min = middle;
                } catch (ex) {
                    // QR code generation failed -> set maximum to middle - 1
                    max = middle - 1;
                    //console.error(ex);
                }
                console.log(`Max length between ${min} and ${max} for ${string_to_try_to_use.slice(0, 10)}...`);
            }
            console.log(`Determined maxiumu length ${min} for ${string_to_try_to_use.slice(0, 10)}...`);
            return string_to_try_to_use.slice(0, min);
        }
    }

    const handleFileUpload = (files) => {
        if (files.length == 1) {
            files[0].text().then(file_text => {
                console.log("Received file:\n", file_text);
                // Update the text field and the QR code
                input_area.value = file_text
                showInputError();
                updateQRCode();
            }).catch(error => {
                showInputError(`Error reading the file: ${error}`);
            })
        } else {
            showInputError(`Received ${files.length} files. Please use only one file at a time.`);
        }
    };

    // Handle pasting a file (copying if in file manager and them pressing Crtl-V [Cmd-V on Mac] while in the browser)
    document.addEventListener("paste", async e => {
        if (e.clipboardData.files.length == 0) {
            // do not prevent the default action, since it would break normal copy + paste
            return
        } else {
            // process files as a file upload
            e.preventDefault();
            handleFileUpload(e.clipboardData.files)
        }
    });

    // Support drag and drop for the input element
    input_area.addEventListener("drop", e => {
        // process files as a file upload
        e.preventDefault();
        handleFileUpload(e.dataTransfer.files)
        return false;
    });

    // Provide a way to download the QR code by clicking it
    const download_qr_code_as_file = () => {
        if (window.qr_code_svg) {
            use_png = USE_PNG_DOWNLOAD;
            const download_link_tag = document.createElement("a");
            const date_string = new Date().toISOString().replace("T", "_").replace(/\.\d+.$/, "_UTC").replaceAll(":", "-"); // Looks like "2025-02-07_04-44-34_UTC"
            const file_extension = use_png ? "png" : "svg"
            download_link_tag.href = get_qr_code_data_url(use_png);
            download_link_tag.download = `qr_code_${date_string}.${file_extension}`;
            download_link_tag.click();
        }
    }

    const get_qr_code_data_url = (use_png) => {
        if (use_png) {
            const scale = 2;
            const canvas = document.createElement("canvas");
            drawCanvas(window.qr_code_object, scale, QR_BORDER_SIZE, "white", "black", canvas);
            return canvas.toDataURL("image/png");
        } else {
            const blob = new Blob([window.qr_code_svg],{type:"application/octet-stream"});
            const blob_url = URL.createObjectURL(blob);
            return blob_url;
        }
    }
    qrcode.addEventListener("click", download_qr_code_as_file);
    qrcode.style.cursor = "pointer";

    // Update the QR code whenever the text or the window size changes
    // Use max-width/height to keep the QR code div in square shape and allow the textarea to use the remaining space
    input_area.addEventListener("input", updateQRCode);
    const on_window_resize = () => {
        const width = text_and_qr.clientWidth;
        const height = text_and_qr.clientHeight;
        if (!width || !height) {
            console.warn(`Size can not be 0 or undefined. But size is (${width}, ${height})`)
        }

        const toStyleValue = (size_in_pixels) => {
            return `${Math.max(size_in_pixels - PADDING, 0)}px`
        }
        if (width < height) {
            const remaining_height = document.body.clientHeight - header.clientHeight - 100; // 100 is the minimum height of the input area div
            // portrait view -> vertical
            text_and_qr.style.flexDirection = "column";
            qrcode.style.maxWidth = "";
            qrcode.style.maxHeight = toStyleValue(Math.min(width, remaining_height));
        } else {
            // landscape view -> horizontal
            const remaining_width = document.body.clientWidth - 200; // 200 is the minimum width of the input area div
            text_and_qr.style.flexDirection = "row";
            qrcode.style.maxWidth = toStyleValue(Math.min(height, remaining_width));
            // Workaround for QR code not shrinking
            qrcode.style.maxHeight = toStyleValue(document.body.clientHeight - header.clientHeight);
        }

        updateQRCode();
    };

    window.addEventListener("resize", on_window_resize);

    // sometimes the event does not get called (for example when closing the browser console). So we call it regularly just to be sure
    setInterval(on_window_resize, 1000)
    // Call it shortly after loading the page to determine the inital layout
    setTimeout(on_window_resize, 10);

    if (SHOW_CLIPBOARD_MONITORING_CONTROLS) {
        let monitor_clipboard_enabled = false;
        let clipboard_interval_handle;

        const monitor_clipboard_menuitem = document.getElementById("monitor-clipboard");
        const update_cb_mon_menuitem = () => monitor_clipboard_menuitem.innerHTML = monitor_clipboard_enabled ? "Stop clipboard monitoring" : "Start clipboard monitoring";
        monitor_clipboard_menuitem.addEventListener("click", () => {
            if (window.isSecureContext) {
                if (monitor_clipboard_enabled) {
                    console.log("Stopping clipboard monitoring");
                    clearInterval(clipboard_interval_handle);
                    monitor_clipboard_enabled = false;
                    showInputError(); // clear the error just in case it was caused by the clipboard
                } else {
                    console.log("Starting clipboard monitoring");
                    clipboard_interval_handle = setInterval(check_clipboard, 100);
                    monitor_clipboard_enabled = true;
                }
            } else {
                if (monitor_clipboard_enabled) {
                    // enable the user to hide the message by pressing stop
                    showInputError();
                } else {
                    showInputError("Clipboard can not be monitored, because the page is not a secure context. See https://developer.mozilla.org/en-US/docs/Web/Security/Secure_Contexts for more details.")
                }
                monitor_clipboard_enabled = !monitor_clipboard_enabled;
            }
            update_cb_mon_menuitem()
        });
        update_cb_mon_menuitem();

        let last_value_copied = "";

        const check_clipboard = () => {
            if (monitor_clipboard_enabled) {
                console.debug("Reading clipboard");
                let clipboard_promise;
                try {
                    clipboard_promise = navigator.clipboard.readText();
                } catch (error) {
                    // Firefox (at least on Linux and Mac) causes this
                    showInputError('Failed to read clipboard contents. This is a known problem in Firefox, please try using a different Browser like Chrome, Edge, etc (anything except Internet Explorer). If you only have Firefox, you could enable Clipboard access by typing "about:config" in the URL bar, searching for "dom.events.testing.asyncClipboard" and setting it to true (by double clicking). Afterwards you can reload the page. Please note, that doing this may have severe security implications, since other websites will be able to read your clipboard, which may contain sensitive information such as passwords.');
                    return;
                }
                clipboard_promise.then(
                    clip_text => {
                        // Only update the text when a different value is copied. This allows the user to change the text without it being reset every second.
                        if (clip_text && clip_text != last_value_copied) {
                            input.value = clip_text;
                            last_value_copied = clip_text;
                        }
                        showInputError();
                    }
                ).catch(error => {
                    // This error only occured on Mac with Safari
                    showInputError(`Failed to read clipboard contents because of the following error: ${error}`);
                });
            }
        };
    }

// https://github.com/101arrowz/fflate, Copyright (c) 2023 Arjun Barrett (MIT License)
// Obtained from https://unpkg.com/fflate@0.8.2
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// ======= https://github.com/nayuki/QR-Code-generator, Copyright © 2024 Project Nayuki. (MIT License) =======
// Minified version of https://github.com/nayuki/QR-Code-generator/releases/download/v1.8.0/qrcodegen-v1.8.0-es6.js using https://closure-compiler.appspot.com/
'use strict';var qrcodegen;
(function(q){function m(b,a,c){if(0>a||31<a||0!=b>>>a)throw new RangeError("Value out of range");for(--a;0<=a;a--)c.push(b>>>a&1)}function h(b){if(!b)throw Error("Assertion error");}class e{constructor(b,a,c,d){this.version=b;this.errorCorrectionLevel=a;this.modules=[];this.isFunction=[];if(b<e.MIN_VERSION||b>e.MAX_VERSION)throw new RangeError("Version value out of range");if(-1>d||7<d)throw new RangeError("Mask value out of range");this.size=4*b+17;b=[];for(a=0;a<this.size;a++)b.push(!1);for(a=0;a<
this.size;a++)this.modules.push(b.slice()),this.isFunction.push(b.slice());this.drawFunctionPatterns();c=this.addEccAndInterleave(c);this.drawCodewords(c);if(-1==d)for(c=1E9,b=0;8>b;b++)this.applyMask(b),this.drawFormatBits(b),a=this.getPenaltyScore(),a<c&&(d=b,c=a),this.applyMask(b);h(0<=d&&7>=d);this.mask=d;this.applyMask(d);this.drawFormatBits(d);this.isFunction=[]}static encodeText(b,a){b=q.QrSegment.makeSegments(b);return e.encodeSegments(b,a)}static encodeBinary(b,a){b=q.QrSegment.makeBytes(b);
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0;n<c[0].length;n++)c.forEach((u,t)=>{(n!=l-g||t>=f)&&p.push(u[n])});h(p.length==a);return p}drawCodewords(b){if(b.length!=Math.floor(e.getNumRawDataModules(this.version)/8))throw new RangeError("Invalid argument");let a=0;for(let c=this.size-1;1<=c;c-=2){6==c&&(c=5);for(let d=0;d<this.size;d++)for(let g=0;2>g;g++){const f=c-g,l=0==(c+1&2)?this.size-1-d:d;!this.isFunction[l][f]&&a<8*b.length&&(this.modules[l][f]=0!=(b[a>>>3]>>>7-(a&7)&1),a++)}}h(a==8*b.length)}applyMask(b){if(0>b||7<b)throw new RangeError("Mask value out of range");
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0,0,0,0,0,0];for(var f=0;f<this.size;f++)this.modules[a][f]==c?(d++,5==d?b+=e.PENALTY_N1:5<d&&b++):(this.finderPenaltyAddHistory(d,g),c||(b+=this.finderPenaltyCountPatterns(g)*e.PENALTY_N3),c=this.modules[a][f],d=1);b+=this.finderPenaltyTerminateAndCount(c,d,g)*e.PENALTY_N3}for(a=0;a<this.size;a++){c=!1;d=0;g=[0,0,0,0,0,0,0];for(f=0;f<this.size;f++)this.modules[f][a]==c?(d++,5==d?b+=e.PENALTY_N1:5<d&&b++):(this.finderPenaltyAddHistory(d,g),c||(b+=this.finderPenaltyCountPatterns(g)*e.PENALTY_N3),c=
this.modules[f][a],d=1);b+=this.finderPenaltyTerminateAndCount(c,d,g)*e.PENALTY_N3}for(a=0;a<this.size-1;a++)for(c=0;c<this.size-1;c++)d=this.modules[a][c],d==this.modules[a][c+1]&&d==this.modules[a+1][c]&&d==this.modules[a+1][c+1]&&(b+=e.PENALTY_N2);a=0;for(var l of this.modules)a=l.reduce((r,p)=>r+(p?1:0),a);l=this.size*this.size;l=Math.ceil(Math.abs(20*a-10*l)/l)-1;h(0<=l&&9>=l);b+=l*e.PENALTY_N4;h(0<=b&&2568888>=b);return b}getAlignmentPatternPositions(){if(1==this.version)return[];const b=Math.floor(this.version/
7)+2,a=32==this.version?26:2*Math.ceil((4*this.version+4)/(2*b-2));let c=[6];for(let d=this.size-7;c.length<b;d-=a)c.splice(1,0,d);return c}static getNumRawDataModules(b){if(b<e.MIN_VERSION||b>e.MAX_VERSION)throw new RangeError("Version number out of range");let a=(16*b+128)*b+64;if(2<=b){const c=Math.floor(b/7)+2;a-=(25*c-10)*c-55;7<=b&&(a-=36)}h(208<=a&&29648>=a);return a}static getNumDataCodewords(b,a){return Math.floor(e.getNumRawDataModules(b)/8)-e.ECC_CODEWORDS_PER_BLOCK[a.ordinal][b]*e.NUM_ERROR_CORRECTION_BLOCKS[a.ordinal][b]}static reedSolomonComputeDivisor(b){if(1>
b||255<b)throw new RangeError("Degree out of range");let a=[];for(var c=0;c<b-1;c++)a.push(0);a.push(1);c=1;for(let d=0;d<b;d++){for(let g=0;g<a.length;g++)a[g]=e.reedSolomonMultiply(a[g],c),g+1<a.length&&(a[g]^=a[g+1]);c=e.reedSolomonMultiply(c,2)}return a}static reedSolomonComputeRemainder(b,a){let c=a.map(d=>0);for(const d of b){const g=d^c.shift();c.push(0);a.forEach((f,l)=>c[l]^=e.reedSolomonMultiply(f,g))}return c}static reedSolomonMultiply(b,a){if(0!=b>>>8||0!=a>>>8)throw new RangeError("Byte out of range");
let c=0;for(let d=7;0<=d;d--)c=c<<1^285*(c>>>7),c^=(a>>>d&1)*b;h(0==c>>>8);return c}finderPenaltyCountPatterns(b){const a=b[1];h(a<=3*this.size);const c=0<a&&b[2]==a&&b[3]==3*a&&b[4]==a&&b[5]==a;return(c&&b[0]>=4*a&&b[6]>=a?1:0)+(c&&b[6]>=4*a&&b[0]>=a?1:0)}finderPenaltyTerminateAndCount(b,a,c){b&&(this.finderPenaltyAddHistory(a,c),a=0);a+=this.size;this.finderPenaltyAddHistory(a,c);return this.finderPenaltyCountPatterns(c)}finderPenaltyAddHistory(b,a){0==a[0]&&(b+=this.size);a.pop();a.unshift(b)}}
e.MIN_VERSION=1;e.MAX_VERSION=40;e.PENALTY_N1=3;e.PENALTY_N2=3;e.PENALTY_N3=40;e.PENALTY_N4=10;e.ECC_CODEWORDS_PER_BLOCK=[[-1,7,10,15,20,26,18,20,24,30,18,20,24,26,30,22,24,28,30,28,28,28,28,30,30,26,28,30,30,30,30,30,30,30,30,30,30,30,30,30,30],[-1,10,16,26,18,24,16,18,22,22,26,30,22,22,24,24,28,28,26,26,26,26,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28],[-1,13,22,18,26,18,24,18,22,20,24,28,26,24,20,30,24,28,28,26,30,28,30,30,30,30,28,30,30,30,30,30,30,30,30,30,30,30,30,30,30],[-1,17,
28,22,16,22,28,26,26,24,28,24,28,22,24,24,30,28,28,26,28,30,24,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30,30]];e.NUM_ERROR_CORRECTION_BLOCKS=[[-1,1,1,1,1,1,2,2,2,2,4,4,4,4,4,6,6,6,6,7,8,8,9,9,10,12,12,12,13,14,15,16,17,18,19,19,20,21,22,24,25],[-1,1,1,1,2,2,4,4,4,5,5,5,8,9,9,10,10,11,13,14,16,17,17,18,20,21,23,25,26,28,29,31,33,35,37,38,40,43,45,47,49],[-1,1,1,2,2,4,4,6,6,8,8,8,10,12,16,12,17,16,18,21,20,23,23,25,27,29,34,34,35,38,40,43,45,48,51,53,56,59,62,65,68],[-1,1,1,2,4,4,4,5,6,8,8,
11,11,16,16,18,16,19,21,25,25,25,34,30,32,35,37,40,42,45,48,51,54,57,60,63,66,70,74,77,81]];q.QrCode=e;class k{constructor(b,a,c){this.mode=b;this.numChars=a;this.bitData=c;if(0>a)throw new RangeError("Invalid argument");this.bitData=c.slice()}static makeBytes(b){let a=[];for(const c of b)m(c,8,a);return new k(k.Mode.BYTE,b.length,a)}static makeNumeric(b){if(!k.isNumeric(b))throw new RangeError("String contains non-numeric characters");let a=[];for(let c=0;c<b.length;){const d=Math.min(b.length-c,
3);m(parseInt(b.substr(c,d),10),3*d+1,a);c+=d}return new k(k.Mode.NUMERIC,b.length,a)}static makeAlphanumeric(b){if(!k.isAlphanumeric(b))throw new RangeError("String contains unencodable characters in alphanumeric mode");let a=[],c;for(c=0;c+2<=b.length;c+=2){let d=45*k.ALPHANUMERIC_CHARSET.indexOf(b.charAt(c));d+=k.ALPHANUMERIC_CHARSET.indexOf(b.charAt(c+1));m(d,11,a)}c<b.length&&m(k.ALPHANUMERIC_CHARSET.indexOf(b.charAt(c)),6,a);return new k(k.Mode.ALPHANUMERIC,b.length,a)}static makeSegments(b){return""==
b?[]:k.isNumeric(b)?[k.makeNumeric(b)]:k.isAlphanumeric(b)?[k.makeAlphanumeric(b)]:[k.makeBytes(k.toUtf8ByteArray(b))]}static makeEci(b){let a=[];if(0>b)throw new RangeError("ECI assignment value out of range");if(128>b)m(b,8,a);else if(16384>b)m(2,2,a),m(b,14,a);else if(1E6>b)m(6,3,a),m(b,21,a);else throw new RangeError("ECI assignment value out of range");return new k(k.Mode.ECI,0,a)}static isNumeric(b){return k.NUMERIC_REGEX.test(b)}static isAlphanumeric(b){return k.ALPHANUMERIC_REGEX.test(b)}getData(){return this.bitData.slice()}static getTotalBits(b,
a){let c=0;for(const d of b){b=d.mode.numCharCountBits(a);if(d.numChars>=1<<b)return Infinity;c+=4+b+d.bitData.length}return c}static toUtf8ByteArray(b){b=encodeURI(b);let a=[];for(let c=0;c<b.length;c++)"%"!=b.charAt(c)?a.push(b.charCodeAt(c)):(a.push(parseInt(b.substr(c+1,2),16)),c+=2);return a}}k.NUMERIC_REGEX=/^[0-9]*$/;k.ALPHANUMERIC_REGEX=/^[A-Z0-9 $%*+.\/:-]*$/;k.ALPHANUMERIC_CHARSET="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:";q.QrSegment=k})(qrcodegen||={});
(function(q){(function(m){class h{constructor(e,k){this.ordinal=e;this.formatBits=k}}h.LOW=new h(0,1);h.MEDIUM=new h(1,0);h.QUARTILE=new h(2,3);h.HIGH=new h(3,2);m.Ecc=h})(q.QrCode||(q.QrCode={}))})(qrcodegen||={});
(function(q){(function(m){class h{constructor(e,k){this.modeBits=e;this.numBitsCharCount=k}numCharCountBits(e){return this.numBitsCharCount[Math.floor((e+7)/17)]}}h.NUMERIC=new h(1,[10,12,14]);h.ALPHANUMERIC=new h(2,[9,11,13]);h.BYTE=new h(4,[8,16,16]);h.KANJI=new h(8,[8,10,12]);h.ECI=new h(7,[0,0,0]);m.Mode=h})(q.QrSegment||(q.QrSegment={}))})(qrcodegen||={});

    // The following snippets are taken from the demo of the QR code generator library (https://www.nayuki.io/res/qr-code-generator-library/qrcodegen-input-demo.js)

    // Returns a string of SVG code for an image depicting the given QR Code, with the given number
	// of border modules. The string always uses Unix newlines (\n), regardless of the platform.
	function toSvgString(qr, border, lightColor, darkColor) {
		if (border < 0)
			throw new RangeError("Border must be non-negative");
		let parts = [];
		for (let y = 0; y < qr.size; y++) {
			for (let x = 0; x < qr.size; x++) {
				if (qr.getModule(x, y))
					parts.push(`M${x + border},${y + border}h1v1h-1z`);
			}
		}
		return `<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" viewBox="0 0 ${qr.size + border * 2} ${qr.size + border * 2}" stroke="none">
	<rect width="100%" height="100%" fill="${lightColor}"/>
	<path d="${parts.join(" ")}" fill="${darkColor}"/>
</svg>
`;
	}

    // Draws the given QR Code, with the given module scale and border modules, onto the given HTML
    // canvas element. The canvas's width and height is resized to (qr.size + border * 2) * scale.
    // The drawn image is purely dark and light, and fully opaque.
    // The scale must be a positive integer and the border must be a non-negative integer.
    function drawCanvas(qr, scale, border, lightColor, darkColor, canvas) {
        if (scale <= 0 || border < 0)
            throw new RangeError("Value out of range");
        const width = (qr.size + border * 2) * scale;
        canvas.width = width;
        canvas.height = width;
        let ctx = canvas.getContext("2d");
        for (let y = -border; y < qr.size + border; y++) {
            for (let x = -border; x < qr.size + border; x++) {
                ctx.fillStyle = qr.getModule(x, y) ? darkColor : lightColor;
                ctx.fillRect((x + border) * scale, (y + border) * scale, scale, scale);
            }
        }
    }
</script>
</body>
</html>