qr-creator-ssr
Version:
Lightweight QR code generator for stylish QR codes
1,575 lines (1,324 loc) • 46.7 kB
JavaScript
'use strict';
let qrCodeGenerator = null;
// Library interface
export default class QrCreator {
static async render(config, $element) {
await qrCodeGenerator(config, $element);
}
}
// avoid that closure compiler strips these away
QrCreator['render'] = QrCreator.render;
globalThis['QrCreator'] = QrCreator;
/*! jquery-qrcode v0.14.0 - https://larsjung.de/jquery-qrcode/ */
(function (vendor_qrcode) {
// Wrapper for the original QR code generator.
function createQRCode(text, level, version, quiet) {
var qr = {};
var vqr = vendor_qrcode(version, level);
vqr.addData(text);
vqr.make();
quiet = quiet || 0;
var qrModuleCount = vqr.getModuleCount(),
quietModuleCount = vqr.getModuleCount() + 2 * quiet;
function isDark(row, col) {
row -= quiet;
col -= quiet;
if (row < 0 || row >= qrModuleCount || col < 0 || col >= qrModuleCount) {
return false;
}
return vqr.isDark(row, col);
}
qr.text = text;
qr.level = level;
qr.version = version;
qr.moduleCount = quietModuleCount;
qr.isDark = isDark;
// qr.addBlank = addBlank;
return qr;
}
// Returns a minimal QR code for the given text starting with version `minVersion`.
// Returns `undefined` if `text` is too long to be encoded in `maxVersion`.
function createMinQRCode(text, level, minVersion, maxVersion, quiet) {
minVersion = Math.max(1, minVersion || 1);
maxVersion = Math.min(40, maxVersion || 40);
for (var version = minVersion; version <= maxVersion; version += 1) {
try {
return createQRCode(text, level, version, quiet);
} catch (err) {}
}
return undefined;
}
function drawBackground(qr, context, settings) {
if (settings.background) {
context.fillStyle = settings.background;
context.fillRect(settings.left, settings.top, settings.size, settings.size);
}
}
function drawIcon(qr, context, settings) {
if (settings.icon && settings.icon.src) {
const maxSize = settings.size * 0.3; // Maximum 30% of QR code size
const iconSize = {
w: Math.min(settings.icon.width || settings.size * 0.2, maxSize),
h: Math.min(settings.icon.height || settings.size * 0.2, maxSize)
};
const iconPos = {
x: settings.left + (settings.size - iconSize.w) / 2,
y: settings.top + (settings.size - iconSize.h) / 2
};
// Clear the icon area first
context.clearRect(iconPos.x, iconPos.y, iconSize.w, iconSize.h);
const img = new Image();
if (settings.icon.crossOrigin) {
img.crossOrigin = settings.icon.crossOrigin;
}
return new Promise((resolve, reject) => {
img.onload = () => {
try {
context.drawImage(img, iconPos.x, iconPos.y, iconSize.w, iconSize.h);
resolve();
} catch (error) {
reject(error);
}
};
img.onerror = () => reject(new Error('Failed to load icon image'));
img.src = settings.icon.src;
});
}
return Promise.resolve();
}
// used when center is filled
function drawModuleRoundedDark(ctx, l, t, r, b, rad, nw, ne, se, sw) {
//let moveTo = (x, y) => ctx.moveTo(Math.floor(x), Math.floor(y));
if (nw) {
ctx.moveTo(l + rad, t);
} else {
ctx.moveTo(l, t);
}
function lal(b, x0, y0, x1, y1, r0, r1) {
if (b) {
ctx.lineTo(x0 + r0, y0 + r1);
ctx.arcTo(x0, y0, x1, y1, rad);
} else {
ctx.lineTo(x0, y0);
}
}
lal(ne, r, t, r, b, -rad, 0);
lal(se, r, b, l, b, 0, -rad);
lal(sw, l, b, l, t, rad, 0);
lal(nw, l, t, r, t, 0, rad);
}
// used when center is empty
function drawModuleRoundendLight(ctx, l, t, r, b, rad, nw, ne, se, sw) {
function mlla(x, y, r0, r1) {
ctx.moveTo(x + r0, y);
ctx.lineTo(x, y);
ctx.lineTo(x, y + r1);
ctx.arcTo(x, y, x + r0, y, rad);
}
if (nw) mlla(l, t, rad, rad);
if (ne) mlla(r, t, -rad, rad);
if (se) mlla(r, b, -rad, -rad);
if (sw) mlla(l, b, rad, -rad);
}
function drawModuleRounded(qr, context, settings, left, top, width, row, col) {
var isDark = qr.isDark,
right = left + width,
bottom = top + width,
rowT = row - 1,
rowB = row + 1,
colL = col - 1,
colR = col + 1,
radius = Math.floor(Math.min(0.5, Math.max(0, settings.radius)) * width),
center = isDark(row, col),
northwest = isDark(rowT, colL),
north = isDark(rowT, col),
northeast = isDark(rowT, colR),
east = isDark(row, colR),
southeast = isDark(rowB, colR),
south = isDark(rowB, col),
southwest = isDark(rowB, colL),
west = isDark(row, colL);
left = Math.round(left);
top = Math.round(top);
right = Math.round(right);
bottom = Math.round(bottom);
if (center) {
drawModuleRoundedDark(
context,
left,
top,
right,
bottom,
radius,
!north && !west,
!north && !east,
!south && !east,
!south && !west
);
} else {
drawModuleRoundendLight(
context,
left,
top,
right,
bottom,
radius,
north && west && northwest,
north && east && northeast,
south && east && southeast,
south && west && southwest
);
}
}
function drawModules(qr, context, settings) {
var moduleCount = qr.moduleCount,
moduleSize = settings.size / moduleCount,
row,
col;
// Set the main fill style
setFill(context, settings);
// If no special corner color, draw everything at once
if (!settings.cornerColor) {
context.beginPath();
for (row = 0; row < moduleCount; row += 1) {
for (col = 0; col < moduleCount; col += 1) {
var l = settings.left + col * moduleSize,
t = settings.top + row * moduleSize,
w = moduleSize;
drawModuleRounded(qr, context, settings, l, t, w, row, col);
}
}
context.fill();
return;
}
// If we have a corner color, draw in two passes
// First pass: non-corner modules
context.beginPath();
for (row = 0; row < moduleCount; row += 1) {
for (col = 0; col < moduleCount; col += 1) {
// Skip corner modules
if ((row < 7 && col < 7) || // Top-left corner
(row < 7 && col >= moduleCount - 7) || // Top-right corner
(row >= moduleCount - 7 && col < 7)) { // Bottom-left corner
continue;
}
var l = settings.left + col * moduleSize,
t = settings.top + row * moduleSize,
w = moduleSize;
drawModuleRounded(qr, context, settings, l, t, w, row, col);
}
}
context.fill();
// Second pass: corner modules with different color
const originalFillStyle = context.fillStyle;
context.fillStyle = settings.cornerColor;
context.beginPath();
// Draw corner modules
for (row = 0; row < moduleCount; row += 1) {
for (col = 0; col < moduleCount; col += 1) {
// Only draw corner modules
if (!((row < 7 && col < 7) || // Top-left corner
(row < 7 && col >= moduleCount - 7) || // Top-right corner
(row >= moduleCount - 7 && col < 7))) { // Bottom-left corner
continue;
}
var l = settings.left + col * moduleSize,
t = settings.top + row * moduleSize,
w = moduleSize;
drawModuleRounded(qr, context, settings, l, t, w, row, col);
}
}
context.fill();
// Restore original fillStyle
context.fillStyle = originalFillStyle;
}
function setFill(context, settings) {
// Handle regular fill
const fill = settings.fill;
if (typeof fill === 'string') {
context.fillStyle = fill;
return;
}
// Handle gradient fill
const type = fill['type'],
position = fill['position'],
colorStops = fill['colorStops'];
let gradient;
const absolutePosition = position.map(coordinate =>
Math.round(coordinate * settings.size)
);
if (type === 'linear-gradient') {
gradient = context.createLinearGradient.apply(context, absolutePosition);
} else if (type === 'radial-gradient') {
gradient = context.createRadialGradient.apply(context, absolutePosition);
} else {
throw new Error('Unsupported fill');
}
colorStops.forEach(([offset, color]) => {
gradient.addColorStop(offset, color);
});
context.fillStyle = gradient;
}
// Draws QR code to the given `canvas` and returns it.
async function drawOnCanvas(canvas, settings) {
var qr = createMinQRCode(
settings.text,
settings.ecLevel,
settings.minVersion,
settings.maxVersion,
settings.quiet
);
if (!qr) {
return null;
}
var context = canvas.getContext('2d');
drawBackground(qr, context, settings);
setFill(context, settings); // Set the initial fill style
drawModules(qr, context, settings);
await drawIcon(qr, context, settings);
return canvas;
}
// Returns a `canvas` element representing the QR code for the given settings.
async function createCanvas(settings) {
var $canvas = document.createElement('canvas');
$canvas.width = settings.size;
$canvas.height = settings.size;
return drawOnCanvas($canvas, settings);
}
// Plugin
// ======
// Default settings
// ----------------
var defaults = {
// version range somewhere in 1 .. 40
minVersion: 1,
maxVersion: 40,
// error correction level: `'L'`, `'M'`, `'Q'` or `'H'`
ecLevel: 'L',
// offset in pixel if drawn onto existing canvas
left: 0,
top: 0,
// size in pixel
size: 200,
// code color or image element
fill: '#000',
// background color, `null` for transparent background
background: null,
// content
text: 'no text',
// corner radius relative to module width: 0.0 .. 0.5
radius: 0.5,
// quiet zone in modules
quiet: 0,
// Color for corner modules, null means same as fill
cornerColor: null,
// center icon
icon: {
src: null, // URL or Data URL of the icon
width: null, // Optional width in pixels
height: null, // Optional height in pixels
crossOrigin: null // Optional crossOrigin setting
}
};
// // Register the plugin
// // -------------------
qrCodeGenerator = async function (options, $element) {
var settings = {};
Object.assign(settings, defaults, options);
// map real names to minifyable properties used by closure compiler
settings.minVersion = settings['minVersion'];
settings.maxVersion = settings['maxVersion'];
settings.ecLevel = settings['ecLevel'];
settings.left = settings['left'];
settings.top = settings['top'];
settings.size = settings['size'];
settings.fill = settings['fill'];
settings.background = settings['background'];
settings.text = settings['text'];
settings.radius = settings['radius'];
settings.quiet = settings['quiet'];
settings.icon = settings['icon'];
if ($element instanceof HTMLCanvasElement) {
if ($element.width !== settings.size || $element.height !== settings.size) {
$element.width = settings.size;
$element.height = settings.size;
}
$element.getContext('2d').clearRect(0, 0, $element.width, $element.height);
return drawOnCanvas($element, settings);
} else {
const $canvas = await createCanvas(settings);
if ($canvas) {
$element.appendChild($canvas);
}
return $canvas;
}
};
})(
(function () {
// `qrcode` is the single public function defined by the `QR Code Generator`
//---------------------------------------------------------------------
//
// QR Code Generator for JavaScript
//
// Copyright (c) 2009 Kazuhiko Arase
//
// URL: http://www.d-project.com/
//
// Licensed under the MIT license:
// http://www.opensource.org/licenses/mit-license.php
//
// The word 'QR Code' is registered trademark of
// DENSO WAVE INCORPORATED
// http://www.denso-wave.com/qrcode/faqpatent-e.html
//
//---------------------------------------------------------------------
var qrcode = (function () {
//---------------------------------------------------------------------
// qrcode
//---------------------------------------------------------------------
/**
* qrcode
* @param typeNumber 1 to 40
* @param errorCorrectLevel 'L','M','Q','H'
*/
var qrcode = function (typeNumber, errorCorrectLevel) {
var PAD0 = 0xec,
PAD1 = 0x11,
_typeNumber = typeNumber,
_errorCorrectLevel = QRErrorCorrectLevel[errorCorrectLevel],
_modules = null,
_moduleCount = 0,
_dataCache = null,
_dataList = new Array(),
_this = {},
makeImpl = function (test, maskPattern) {
_moduleCount = _typeNumber * 4 + 17;
_modules = (function (moduleCount) {
var modules = new Array(moduleCount);
for (var row = 0; row < moduleCount; row += 1) {
modules[row] = new Array(moduleCount);
for (var col = 0; col < moduleCount; col += 1) {
modules[row][col] = null;
}
}
return modules;
})(_moduleCount);
setupPositionProbePattern(0, 0);
setupPositionProbePattern(_moduleCount - 7, 0);
setupPositionProbePattern(0, _moduleCount - 7);
setupPositionAdjustPattern();
setupTimingPattern();
setupTypeInfo(test, maskPattern);
if (_typeNumber >= 7) {
setupTypeNumber(test);
}
if (_dataCache == null) {
_dataCache = createData(_typeNumber, _errorCorrectLevel, _dataList);
}
mapData(_dataCache, maskPattern);
},
setupPositionProbePattern = function (row, col) {
for (var r = -1; r <= 7; r += 1) {
if (row + r <= -1 || _moduleCount <= row + r) continue;
for (var c = -1; c <= 7; c += 1) {
if (col + c <= -1 || _moduleCount <= col + c) continue;
if (
(0 <= r && r <= 6 && (c == 0 || c == 6)) ||
(0 <= c && c <= 6 && (r == 0 || r == 6)) ||
(2 <= r && r <= 4 && 2 <= c && c <= 4)
) {
_modules[row + r][col + c] = true;
} else {
_modules[row + r][col + c] = false;
}
}
}
},
getBestMaskPattern = function () {
var minLostPoint = 0,
pattern = 0;
for (var i = 0; i < 8; i += 1) {
makeImpl(true, i);
var lostPoint = QRUtil.getLostPoint(_this);
if (i == 0 || minLostPoint > lostPoint) {
minLostPoint = lostPoint;
pattern = i;
}
}
return pattern;
},
setupTimingPattern = function () {
for (var r = 8; r < _moduleCount - 8; r += 1) {
if (_modules[r][6] != null) {
continue;
}
_modules[r][6] = r % 2 == 0;
}
for (var c = 8; c < _moduleCount - 8; c += 1) {
if (_modules[6][c] != null) {
continue;
}
_modules[6][c] = c % 2 == 0;
}
},
setupPositionAdjustPattern = function () {
var pos = QRUtil.getPatternPosition(_typeNumber);
for (var i = 0; i < pos.length; i += 1) {
for (var j = 0; j < pos.length; j += 1) {
var row = pos[i];
var col = pos[j];
if (_modules[row][col] != null) {
continue;
}
for (var r = -2; r <= 2; r += 1) {
for (var c = -2; c <= 2; c += 1) {
_modules[row + r][col + c] = r == -2 || r == 2 || c == -2 || c == 2 || (r == 0 && c == 0);
}
}
}
}
},
// TODO rm5 can be removed if we fix type to 5 (this method is called at 7 only)
setupTypeNumber = function (test) {
var bits = QRUtil.getBCHTypeNumber(_typeNumber);
for (var i = 0; i < 18; i += 1) {
var mod = !test && ((bits >> i) & 1) == 1;
_modules[Math.floor(i / 3)][(i % 3) + _moduleCount - 8 - 3] = mod;
}
for (var i = 0; i < 18; i += 1) {
var mod = !test && ((bits >> i) & 1) == 1;
_modules[(i % 3) + _moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
}
},
setupTypeInfo = function (test, maskPattern) {
var data = (_errorCorrectLevel << 3) | maskPattern;
var bits = QRUtil.getBCHTypeInfo(data);
for (var i = 0; i < 15; i += 1) {
let mod = !test && ((bits >> i) & 1) == 1;
// vertical then horizontal
_modules[i < 6 ? i : i < 8 ? i + 1 : _moduleCount - 15 + i][8] = mod;
_modules[8][i < 8 ? _moduleCount - i - 1 : i < 9 ? 15 - i : 14 - i] = mod;
}
// fixed module
_modules[_moduleCount - 8][8] = !test;
},
mapData = function (data, maskPattern) {
var inc = -1,
row = _moduleCount - 1,
bitIndex = 7,
byteIndex = 0,
maskFunc = QRUtil.getMaskFunction(maskPattern);
for (var col = _moduleCount - 1; col > 0; col -= 2) {
if (col == 6) col -= 1;
while (true) {
for (var c = 0; c < 2; c += 1) {
if (_modules[row][col - c] == null) {
var dark = false;
if (byteIndex < data.length) {
dark = ((data[byteIndex] >>> bitIndex) & 1) == 1;
}
var mask = maskFunc(row, col - c);
if (mask) {
dark = !dark;
}
_modules[row][col - c] = dark;
bitIndex -= 1;
if (bitIndex == -1) {
byteIndex += 1;
bitIndex = 7;
}
}
}
row += inc;
if (row < 0 || _moduleCount <= row) {
row -= inc;
inc = -inc;
break;
}
}
}
},
createBytes = function (buffer, rsBlocks) {
var offset = 0,
maxDcCount = 0,
maxEcCount = 0,
dcdata = new Array(rsBlocks.length),
ecdata = new Array(rsBlocks.length);
for (var r = 0; r < rsBlocks.length; r += 1) {
var dcCount = rsBlocks[r].dataCount,
ecCount = rsBlocks[r].totalCount - dcCount;
maxDcCount = Math.max(maxDcCount, dcCount);
maxEcCount = Math.max(maxEcCount, ecCount);
dcdata[r] = new Array(dcCount);
for (var i = 0; i < dcdata[r].length; i += 1) {
dcdata[r][i] = 0xff & buffer.getBuffer()[i + offset];
}
offset += dcCount;
var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount),
rawPoly = qrPolynomial(dcdata[r], rsPoly.getLength() - 1),
modPoly = rawPoly.mod(rsPoly);
ecdata[r] = new Array(rsPoly.getLength() - 1);
for (var i = 0; i < ecdata[r].length; i += 1) {
var modIndex = i + modPoly.getLength() - ecdata[r].length;
ecdata[r][i] = modIndex >= 0 ? modPoly.getAt(modIndex) : 0;
}
}
var totalCodeCount = 0;
for (var i = 0; i < rsBlocks.length; i += 1) {
totalCodeCount += rsBlocks[i].totalCount;
}
var data = new Array(totalCodeCount);
var index = 0;
for (var i = 0; i < maxDcCount; i += 1) {
for (var r = 0; r < rsBlocks.length; r += 1) {
if (i < dcdata[r].length) {
data[index] = dcdata[r][i];
index += 1;
}
}
}
for (var i = 0; i < maxEcCount; i += 1) {
for (var r = 0; r < rsBlocks.length; r += 1) {
if (i < ecdata[r].length) {
data[index] = ecdata[r][i];
index += 1;
}
}
}
return data;
},
createData = function (typeNumber, errorCorrectLevel, dataList) {
var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel),
buffer = qrBitBuffer();
for (var i = 0; i < dataList.length; i += 1) {
var data = dataList[i];
buffer.put(data.getMode(), 4);
buffer.put(data.getLength(), QRUtil.getLengthInBits(data.getMode(), typeNumber));
data.write(buffer);
}
// calc num max data.
var totalDataCount = 0;
for (var i = 0; i < rsBlocks.length; i += 1) {
totalDataCount += rsBlocks[i].dataCount;
}
if (buffer.getLengthInBits() > totalDataCount * 8) {
throw new Error('code length overflow. (' + buffer.getLengthInBits() + '>' + totalDataCount * 8 + ')');
}
// end code
if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) {
buffer.put(0, 4);
}
// padding
while (buffer.getLengthInBits() % 8 != 0) {
buffer.putBit(false);
}
// padding
while (true) {
if (buffer.getLengthInBits() >= totalDataCount * 8) {
break;
}
buffer.put(PAD0, 8);
if (buffer.getLengthInBits() >= totalDataCount * 8) {
break;
}
buffer.put(PAD1, 8);
}
return createBytes(buffer, rsBlocks);
};
_this.addData = function (data) {
var newData = qr8BitByte(data);
_dataList.push(newData);
_dataCache = null;
};
_this.isDark = function (row, col) {
if (row < 0 || _moduleCount <= row || col < 0 || _moduleCount <= col) {
throw new Error(row + ',' + col);
}
return _modules[row][col];
};
_this.getModuleCount = function () {
return _moduleCount;
};
_this.make = function () {
makeImpl(false, getBestMaskPattern());
};
return _this;
};
//---------------------------------------------------------------------
// qrcode.stringToBytes
//---------------------------------------------------------------------
function toUTF8Array(str) {
const utf8 = [];
for (let i = 0; i < str.length; i++) {
let charcode = str.charCodeAt(i);
if (charcode < 0x80) {
utf8.push(charcode);
} else if (charcode < 0x800) {
utf8.push(0xc0 | (charcode >> 6),
0x80 | (charcode & 0x3f));
} else if (charcode < 0xd800 || charcode >= 0xe000) {
utf8.push(0xe0 | (charcode >> 12),
0x80 | ((charcode >> 6) & 0x3f),
0x80 | (charcode & 0x3f));
} else {
// surrogate pair
i++;
charcode = ((charcode & 0x3ff) << 10) | (str.charCodeAt(i) & 0x3ff);
charcode += 0x10000;
utf8.push(0xf0 | (charcode >> 18),
0x80 | ((charcode >> 12) & 0x3f),
0x80 | ((charcode >> 6) & 0x3f),
0x80 | (charcode & 0x3f));
}
}
return utf8;
}
qrcode.stringToBytes = function(s) {
if (typeof TextEncoder !== 'undefined') {
return new TextEncoder().encode(s);
}
// Fallback for older browsers
return toUTF8Array(s);
};
//---------------------------------------------------------------------
// QRMode
//---------------------------------------------------------------------
var QRMode = {
MODE_8BIT_BYTE: 1 << 2
};
//---------------------------------------------------------------------
// QRErrorCorrectLevel
//---------------------------------------------------------------------
var QRErrorCorrectLevel = {
L: 1,
M: 0,
Q: 3,
H: 2
};
//---------------------------------------------------------------------
// QRMaskPattern
//---------------------------------------------------------------------
var QRMaskPattern = {
PATTERN000: 0,
PATTERN001: 1,
PATTERN010: 2,
PATTERN011: 3,
PATTERN100: 4,
PATTERN101: 5,
PATTERN110: 6,
PATTERN111: 7
};
//---------------------------------------------------------------------
// QRUtil
//---------------------------------------------------------------------
var QRUtil = (function () {
var PATTERN_POSITION_TABLE = [
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[],
[]
],
G15 = (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0),
G18 = (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0),
G15_MASK = (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1),
_this = {},
getBCHDigit = function (data) {
var digit = 0;
while (data != 0) {
digit += 1;
data >>>= 1;
}
return digit;
};
_this.getBCHTypeInfo = function (data) {
var d = data << 10;
while (getBCHDigit(d) - getBCHDigit(G15) >= 0) {
d ^= G15 << (getBCHDigit(d) - getBCHDigit(G15));
}
return ((data << 10) | d) ^ G15_MASK;
};
// TODO rm5 (see rm5 above)
_this.getBCHTypeNumber = function (data) {
var d = data << 12;
while (getBCHDigit(d) - getBCHDigit(G18) >= 0) {
d ^= G18 << (getBCHDigit(d) - getBCHDigit(G18));
}
return (data << 12) | d;
};
_this.getPatternPosition = function (typeNumber) {
return PATTERN_POSITION_TABLE[typeNumber - 1];
};
_this.getMaskFunction = function (maskPattern) {
switch (maskPattern) {
case QRMaskPattern.PATTERN000:
return function (i, j) {
return (i + j) % 2 == 0;
};
case QRMaskPattern.PATTERN001:
return function (i, j) {
return i % 2 == 0;
};
case QRMaskPattern.PATTERN010:
return function (i, j) {
return j % 3 == 0;
};
case QRMaskPattern.PATTERN011:
return function (i, j) {
return (i + j) % 3 == 0;
};
case QRMaskPattern.PATTERN100:
return function (i, j) {
return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0;
};
case QRMaskPattern.PATTERN101:
return function (i, j) {
return ((i * j) % 2) + ((i * j) % 3) == 0;
};
case QRMaskPattern.PATTERN110:
return function (i, j) {
return (((i * j) % 2) + ((i * j) % 3)) % 2 == 0;
};
case QRMaskPattern.PATTERN111:
return function (i, j) {
return (((i * j) % 3) + ((i + j) % 2)) % 2 == 0;
};
default:
throw new Error('bad maskPattern:' + maskPattern);
}
};
_this.getErrorCorrectPolynomial = function (errorCorrectLength) {
var a = qrPolynomial([1], 0);
for (var i = 0; i < errorCorrectLength; i += 1) {
a = a.multiply(qrPolynomial([1, QRMath.gexp(i)], 0));
}
return a;
};
_this.getLengthInBits = function (mode, type) {
if (mode != QRMode.MODE_8BIT_BYTE || type < 1 || type > 40)
throw new Error('mode: ' + mode + '; type: ' + type);
return type < 10 ? 8 : 16;
};
_this.getLostPoint = function (qrcode) {
var moduleCount = qrcode.getModuleCount(),
lostPoint = 0;
// LEVEL1
for (var row = 0; row < moduleCount; row += 1) {
for (var col = 0; col < moduleCount; col += 1) {
var sameCount = 0,
dark = qrcode.isDark(row, col);
for (var r = -1; r <= 1; r += 1) {
if (row + r < 0 || moduleCount <= row + r) {
continue;
}
for (var c = -1; c <= 1; c += 1) {
if (col + c < 0 || moduleCount <= col + c) {
continue;
}
if (r == 0 && c == 0) {
continue;
}
if (dark == qrcode.isDark(row + r, col + c)) {
sameCount += 1;
}
}
}
if (sameCount > 5) {
lostPoint += 3 + sameCount - 5;
}
}
}
// LEVEL2
for (var row = 0; row < moduleCount - 1; row += 1) {
for (var col = 0; col < moduleCount - 1; col += 1) {
var count = 0;
if (qrcode.isDark(row, col)) count += 1;
if (qrcode.isDark(row + 1, col)) count += 1;
if (qrcode.isDark(row, col + 1)) count += 1;
if (qrcode.isDark(row + 1, col + 1)) count += 1;
if (count == 0 || count == 4) {
lostPoint += 3;
}
}
}
// LEVEL3
for (var row = 0; row < moduleCount; row += 1) {
for (var col = 0; col < moduleCount - 6; col += 1) {
if (
qrcode.isDark(row, col) &&
!qrcode.isDark(row, col + 1) &&
qrcode.isDark(row, col + 2) &&
qrcode.isDark(row, col + 3) &&
qrcode.isDark(row, col + 4) &&
!qrcode.isDark(row, col + 5) &&
qrcode.isDark(row, col + 6)
) {
lostPoint += 40;
}
}
}
for (var col = 0; col < moduleCount; col += 1) {
for (var row = 0; row < moduleCount - 6; row += 1) {
if (
qrcode.isDark(row, col) &&
!qrcode.isDark(row + 1, col) &&
qrcode.isDark(row + 2, col) &&
qrcode.isDark(row + 3, col) &&
qrcode.isDark(row + 4, col) &&
!qrcode.isDark(row + 5, col) &&
qrcode.isDark(row + 6, col)
) {
lostPoint += 40;
}
}
}
// LEVEL4
var darkCount = 0;
for (var col = 0; col < moduleCount; col += 1) {
for (var row = 0; row < moduleCount; row += 1) {
if (qrcode.isDark(row, col)) {
darkCount += 1;
}
}
}
var ratio = Math.abs((100 * darkCount) / moduleCount / moduleCount - 50) / 5;
lostPoint += ratio * 10;
return lostPoint;
};
return _this;
})();
//---------------------------------------------------------------------
// QRMath
//---------------------------------------------------------------------
var QRMath = (function () {
var EXP_TABLE = new Array(256),
LOG_TABLE = new Array(256);
// initialize tables
for (var i = 0; i < 8; i += 1) {
EXP_TABLE[i] = 1 << i;
}
for (var i = 8; i < 256; i += 1) {
EXP_TABLE[i] = EXP_TABLE[i - 4] ^ EXP_TABLE[i - 5] ^ EXP_TABLE[i - 6] ^ EXP_TABLE[i - 8];
}
for (var i = 0; i < 255; i += 1) {
LOG_TABLE[EXP_TABLE[i]] = i;
}
var _this = {};
_this.glog = function (n) {
if (n < 1) {
throw new Error('glog(' + n + ')');
}
return LOG_TABLE[n];
};
_this.gexp = function (n) {
while (n < 0) {
n += 255;
}
while (n >= 256) {
n -= 255;
}
return EXP_TABLE[n];
};
return _this;
})();
//---------------------------------------------------------------------
// qrPolynomial
//---------------------------------------------------------------------
function qrPolynomial(num, shift) {
if (typeof num.length == 'undefined') {
throw new Error(num.length + '/' + shift);
}
var _num = (function () {
var offset = 0;
while (offset < num.length && num[offset] == 0) {
offset += 1;
}
var _num = new Array(num.length - offset + shift);
for (var i = 0; i < num.length - offset; i += 1) {
_num[i] = num[i + offset];
}
return _num;
})();
var _this = {};
_this.getAt = function (index) {
return _num[index];
};
_this.getLength = function () {
return _num.length;
};
_this.multiply = function (e) {
var num = new Array(_this.getLength() + e.getLength() - 1);
for (var i = 0; i < _this.getLength(); i += 1) {
for (var j = 0; j < e.getLength(); j += 1) {
num[i + j] ^= QRMath.gexp(QRMath.glog(_this.getAt(i)) + QRMath.glog(e.getAt(j)));
}
}
return qrPolynomial(num, 0);
};
_this.mod = function (e) {
if (_this.getLength() - e.getLength() < 0) {
return _this;
}
var ratio = QRMath.glog(_this.getAt(0)) - QRMath.glog(e.getAt(0));
var num = new Array(_this.getLength());
for (var i = 0; i < _this.getLength(); i += 1) {
num[i] = _this.getAt(i);
}
for (var i = 0; i < e.getLength(); i += 1) {
num[i] ^= QRMath.gexp(QRMath.glog(e.getAt(i)) + ratio);
}
// recursive call
return qrPolynomial(num, 0).mod(e);
};
return _this;
}
//---------------------------------------------------------------------
// QRRSBlock
//---------------------------------------------------------------------
var QRRSBlock = (function () {
// TODO is it possible to generate this block with JS in let kB?
var RS_BLOCK_TABLE = [
// L
// M
// Q
// H
// 1
[],
[],
[],
[],
// 2
[],
[],
[],
[],
// 3
[],
[],
[],
[],
// 4
[],
[],
[],
[],
// 5
[],
[],
[],
[],
// 6
[],
[],
[],
[],
// 7
[],
[],
[],
[],
// 8
[],
[],
[],
[],
// 9
[],
[],
[],
[],
// 10
[],
[],
[],
[],
// 11
[],
[],
[],
[],
// 12
[],
[],
[],
[],
// 13
[],
[],
[],
[],
// 14
[],
[],
[],
[],
// 15
[],
[],
[],
[],
// 16
[],
[],
[],
[],
// 17
[],
[],
[],
[],
// 18
[],
[],
[],
[],
// 19
[],
[],
[],
[],
// 20
[],
[],
[],
[],
// 21
[],
[],
[],
[],
// 22
[],
[],
[],
[],
// 23
[],
[],
[],
[],
// 24
[],
[],
[],
[],
// 25
[],
[],
[],
[],
// 26
[],
[],
[],
[],
// 27
[],
[],
[],
[],
// 28
[],
[],
[],
[],
// 29
[],
[],
[],
[],
// 30
[],
[],
[],
[],
// 31
[],
[],
[],
[],
// 32
[],
[],
[],
[],
// 33
[],
[],
[],
[],
// 34
[],
[],
[],
[],
// 35
[],
[],
[],
[],
// 36
[],
[],
[],
[],
// 37
[],
[],
[],
[],
// 38
[],
[],
[],
[],
// 39
[],
[],
[],
[],
// 40
[],
[],
[],
[]
];
var qrRSBlock = function (totalCount, dataCount) {
var _this = {};
_this.totalCount = totalCount;
_this.dataCount = dataCount;
return _this;
};
var _this = {};
var getRsBlockTable = function (typeNumber, errorCorrectLevel) {
switch (errorCorrectLevel) {
case QRErrorCorrectLevel['L']:
return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0];
case QRErrorCorrectLevel['M']:
return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1];
case QRErrorCorrectLevel['Q']:
return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2];
case QRErrorCorrectLevel['H']:
return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3];
default:
return undefined;
}
};
_this.getRSBlocks = function (typeNumber, errorCorrectLevel) {
var rsBlock = getRsBlockTable(typeNumber, errorCorrectLevel);
if (typeof rsBlock == 'undefined') {
throw new Error('bad rs block @ typeNumber:' + typeNumber + '/errorCorrectLevel:' + errorCorrectLevel);
}
var length = rsBlock.length / 3,
list = new Array();
for (var i = 0; i < length; i += 1) {
var count = rsBlock[i * 3 + 0],
totalCount = rsBlock[i * 3 + 1],
dataCount = rsBlock[i * 3 + 2];
for (var j = 0; j < count; j += 1) {
list.push(qrRSBlock(totalCount, dataCount));
}
}
return list;
};
return _this;
})();
//---------------------------------------------------------------------
// qrBitBuffer
//---------------------------------------------------------------------
var qrBitBuffer = function () {
var _buffer = new Array(),
_length = 0,
_this = {};
_this.getBuffer = function () {
return _buffer;
};
_this.getAt = function (index) {
var bufIndex = Math.floor(index / 8);
return ((_buffer[bufIndex] >>> (7 - (index % 8))) & 1) == 1;
};
_this.put = function (num, length) {
if (length > 32) { // JavaScript bit operations are limited to 32 bits
throw new Error('Length too large for bit operations');
}
for (var i = 0; i < length; i += 1) {
_this.putBit(((num >>> (length - i - 1)) & 1) == 1);
}
};
_this.getLengthInBits = function () {
return _length;
};
_this.putBit = function (bit) {
var bufIndex = Math.floor(_length / 8);
if (_buffer.length <= bufIndex) {
_buffer.push(0);
}
if (bit) {
_buffer[bufIndex] |= 0x80 >>> _length % 8;
}
_length += 1;
};
return _this;
};
//---------------------------------------------------------------------
// qr8BitByte
//---------------------------------------------------------------------
var qr8BitByte = function (data) {
var _mode = QRMode.MODE_8BIT_BYTE,
_data = data,
_bytes = qrcode.stringToBytes(data),
_this = {};
_this.getMode = function () {
return _mode;
};
_this.getLength = function (buffer) {
return _bytes.length;
};
_this.write = function (buffer) {
for (var i = 0; i < _bytes.length; i += 1) {
buffer.put(_bytes[i], 8);
}
};
return _this;
};
// returns qrcode function.
return qrcode;
})();
return qrcode; // eslint-disable-line no-undef
})()
);