From 72516c311bd4ae39604cbc4b1903e0e97b882602 Mon Sep 17 00:00:00 2001 From: Marijn Besseling Date: Wed, 10 Sep 2025 21:12:51 +0200 Subject: add qr pages --- Blog/Components/App.razor | 4 +- Blog/Components/Pages/QRCodeGenerator.razor | 11 + Blog/Components/Pages/QRCodeGenerator.razor.js | 13 + Blog/Components/Pages/QRCodeScan.razor | 10 + Blog/Components/Pages/QRCodeScan.razor.js | 100 ++++ Blog/wwwroot/qrcode.js | 658 +++++++++++++++++++++++++ 6 files changed, 794 insertions(+), 2 deletions(-) create mode 100644 Blog/Components/Pages/QRCodeGenerator.razor create mode 100644 Blog/Components/Pages/QRCodeGenerator.razor.js create mode 100644 Blog/Components/Pages/QRCodeScan.razor create mode 100644 Blog/Components/Pages/QRCodeScan.razor.js create mode 100644 Blog/wwwroot/qrcode.js (limited to 'Blog') diff --git a/Blog/Components/App.razor b/Blog/Components/App.razor index 24c9d62..147be34 100644 --- a/Blog/Components/App.razor +++ b/Blog/Components/App.razor @@ -51,8 +51,8 @@
  • Netflix to Letterboxd converter
  • Number generator
  • Note
    • -
  • QR-code scanner
    • -
  • QR-code generator
    • +
  • QR-code scanner
    • +
  • QR-code generator
    • diff --git a/Blog/Components/Pages/QRCodeGenerator.razor b/Blog/Components/Pages/QRCodeGenerator.razor new file mode 100644 index 0000000..07c651e --- /dev/null +++ b/Blog/Components/Pages/QRCodeGenerator.razor @@ -0,0 +1,11 @@ +@page "/QRCodeGenerator" +QR-Code generator + + +
    + +
    +
    +
    +
    +
    \ No newline at end of file diff --git a/Blog/Components/Pages/QRCodeGenerator.razor.js b/Blog/Components/Pages/QRCodeGenerator.razor.js new file mode 100644 index 0000000..560b103 --- /dev/null +++ b/Blog/Components/Pages/QRCodeGenerator.razor.js @@ -0,0 +1,13 @@ +import { getById } from '/common.module.js'; +import {QRCode} from '/qrcode.js'; + +export function onLoad() { + var qrcode = new QRCode("qrcode", + "https://bes.is/"); + + const input = getById("input"); + input.oninput = () => { + const value = input.value; + qrcode.makeCode(value); + } +} \ No newline at end of file diff --git a/Blog/Components/Pages/QRCodeScan.razor b/Blog/Components/Pages/QRCodeScan.razor new file mode 100644 index 0000000..292a8e8 --- /dev/null +++ b/Blog/Components/Pages/QRCodeScan.razor @@ -0,0 +1,10 @@ +@page "/QRCodeScan" +QR-Code scanner + + +
    + +
    +
    +
    +
    \ No newline at end of file diff --git a/Blog/Components/Pages/QRCodeScan.razor.js b/Blog/Components/Pages/QRCodeScan.razor.js new file mode 100644 index 0000000..bb80f37 --- /dev/null +++ b/Blog/Components/Pages/QRCodeScan.razor.js @@ -0,0 +1,100 @@ +import { getById, writeError, writeInfo, a, div } from "/common.module.js"; + +// regexr.com/2rj36 +const url_like_regex = + /^[-a-zA-Z0-9@:%_\+.~#?&//=]{2,256}\.[a-z]{2,4}\b(\/[-a-zA-Z0-9@:%_\+.~#?&//=]*)?$/i; + +///https://stackoverflow.com/questions/3115982/how-to-check-if-two-arrays-are-equal-with-javascript +function arraysEqual(a, b) { + if (a === b) return true; + if (a == null || b == null) return false; + if (a.length !== b.length) return false; + + for (var i = 0; i < a.length; ++i) { + if (a[i] !== b[i]) return false; + } + return true; +} + +function logQRValue(value) { + if (URL.canParse(value)) { + writeInfo(div(a(new URL(url).href, value))); + } else if (url_like_regex.test(value)) { + // Not a true URL but close enough for me to create an anchor tag. + if (!value.startsWith("http://") && !value.startsWith("https://")) { + value = "https://" + value; + } + writeInfo(div(a(value, value))); + } else { + writeInfo(value); + } +} + +export function onLoad() { + // check compatibility + if (!("BarcodeDetector" in globalThis)) { + writeError( + "Barcode Detector is not supported by this browser. Make sure Shape Detection API is turned on.", + ); + } else { + writeInfo("Barcode Detector supported!"); + + // create new detector + const barcodeDetector = new BarcodeDetector({ + formats: ["qr_code"], + }); + + const initBarcodescan = (stream) => { + writeInfo("Starting scanner..."); + var lastbarcodes = []; + setInterval(() => { + barcodeDetector + .detect(stream) + .then((barcodes) => { + if (barcodes.length === 0) { + } else { + const values = barcodes.map( + (barcode) => barcode.rawValue, + ); + if (arraysEqual(values, lastbarcodes)) { + return; + } + + values.forEach(logQRValue); + lastbarcodes = values; + } + }) + .catch((err) => { + writeError(err); + }); + }, 1000); + }; + + var video = getById("video"); + video.setAttribute("playsinline", ""); + video.setAttribute("autoplay", ""); + video.setAttribute("muted", ""); + video.style.width = "100%"; + // video.style.height = "100%"; + + /* Setting up the constraint */ + var facingMode = "environment"; // Can be 'user' or 'environment' to access back or front camera (NEAT!) + var constraints = { + audio: false, + video: { + facingMode: facingMode, + }, + }; + + /* Stream it to video element */ + navigator.mediaDevices + .getUserMedia(constraints) + .then(function success(stream) { + video.srcObject = stream; + }) + .finally(() => { + writeInfo("Initialized video stream"); + initBarcodescan(video); + }); + } +} \ No newline at end of file diff --git a/Blog/wwwroot/qrcode.js b/Blog/wwwroot/qrcode.js new file mode 100644 index 0000000..bad8b20 --- /dev/null +++ b/Blog/wwwroot/qrcode.js @@ -0,0 +1,658 @@ +/** + * @fileoverview + * - Using the 'QRCode for Javascript library' + * - Fixed dataset of 'QRCode for Javascript library' for support full-spec. + * - this library has no dependencies. + * + * @author davidshimjs + * @see http://www.d-project.com/ + * @see http://jeromeetienne.github.com/jquery-qrcode/ + */ +var QRCode; + +(function () { + //--------------------------------------------------------------------- + // QRCode 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 + // + //--------------------------------------------------------------------- + function QR8bitByte(data) { + this.mode = QRMode.MODE_8BIT_BYTE; + this.data = data; + this.parsedData = []; + + // Added to support UTF-8 Characters + for (var i = 0, l = this.data.length; i < l; i++) { + var byteArray = []; + var code = this.data.charCodeAt(i); + + if (code > 0x10000) { + byteArray[0] = 0xF0 | ((code & 0x1C0000) >>> 18); + byteArray[1] = 0x80 | ((code & 0x3F000) >>> 12); + byteArray[2] = 0x80 | ((code & 0xFC0) >>> 6); + byteArray[3] = 0x80 | (code & 0x3F); + } else if (code > 0x800) { + byteArray[0] = 0xE0 | ((code & 0xF000) >>> 12); + byteArray[1] = 0x80 | ((code & 0xFC0) >>> 6); + byteArray[2] = 0x80 | (code & 0x3F); + } else if (code > 0x80) { + byteArray[0] = 0xC0 | ((code & 0x7C0) >>> 6); + byteArray[1] = 0x80 | (code & 0x3F); + } else { + byteArray[0] = code; + } + + this.parsedData.push(byteArray); + } + + this.parsedData = Array.prototype.concat.apply([], this.parsedData); + + if (this.parsedData.length != this.data.length) { + this.parsedData.unshift(191); + this.parsedData.unshift(187); + this.parsedData.unshift(239); + } + } + + QR8bitByte.prototype = { + getLength: function (buffer) { + return this.parsedData.length; + }, + write: function (buffer) { + for (var i = 0, l = this.parsedData.length; i < l; i++) { + buffer.put(this.parsedData[i], 8); + } + } + }; + + function QRCodeModel(typeNumber, errorCorrectLevel) { + this.typeNumber = typeNumber; + this.errorCorrectLevel = errorCorrectLevel; + this.modules = null; + this.moduleCount = 0; + this.dataCache = null; + this.dataList = []; + } + + QRCodeModel.prototype = { + addData: function (data) { var newData = new QR8bitByte(data); this.dataList.push(newData); this.dataCache = null; }, isDark: function (row, col) { + if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) { throw new Error(row + "," + col); } + return this.modules[row][col]; + }, getModuleCount: function () { return this.moduleCount; }, make: function () { this.makeImpl(false, this.getBestMaskPattern()); }, makeImpl: function (test, maskPattern) { + this.moduleCount = this.typeNumber * 4 + 17; this.modules = new Array(this.moduleCount); for (var row = 0; row < this.moduleCount; row++) { this.modules[row] = new Array(this.moduleCount); for (var col = 0; col < this.moduleCount; col++) { this.modules[row][col] = null; } } + this.setupPositionProbePattern(0, 0); this.setupPositionProbePattern(this.moduleCount - 7, 0); this.setupPositionProbePattern(0, this.moduleCount - 7); this.setupPositionAdjustPattern(); this.setupTimingPattern(); this.setupTypeInfo(test, maskPattern); if (this.typeNumber >= 7) { this.setupTypeNumber(test); } + if (this.dataCache == null) { this.dataCache = QRCodeModel.createData(this.typeNumber, this.errorCorrectLevel, this.dataList); } + this.mapData(this.dataCache, maskPattern); + }, setupPositionProbePattern: function (row, col) { for (var r = -1; r <= 7; r++) { if (row + r <= -1 || this.moduleCount <= row + r) continue; for (var c = -1; c <= 7; c++) { if (col + c <= -1 || this.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)) { this.modules[row + r][col + c] = true; } else { this.modules[row + r][col + c] = false; } } } }, getBestMaskPattern: function () { + var minLostPoint = 0; var pattern = 0; for (var i = 0; i < 8; i++) { this.makeImpl(true, i); var lostPoint = QRUtil.getLostPoint(this); if (i == 0 || minLostPoint > lostPoint) { minLostPoint = lostPoint; pattern = i; } } + return pattern; + }, createMovieClip: function (target_mc, instance_name, depth) { + var qr_mc = target_mc.createEmptyMovieClip(instance_name, depth); var cs = 1; this.make(); for (var row = 0; row < this.modules.length; row++) { var y = row * cs; for (var col = 0; col < this.modules[row].length; col++) { var x = col * cs; var dark = this.modules[row][col]; if (dark) { qr_mc.beginFill(0, 100); qr_mc.moveTo(x, y); qr_mc.lineTo(x + cs, y); qr_mc.lineTo(x + cs, y + cs); qr_mc.lineTo(x, y + cs); qr_mc.endFill(); } } } + return qr_mc; + }, setupTimingPattern: function () { + for (var r = 8; r < this.moduleCount - 8; r++) { + if (this.modules[r][6] != null) { continue; } + this.modules[r][6] = (r % 2 == 0); + } + for (var c = 8; c < this.moduleCount - 8; c++) { + if (this.modules[6][c] != null) { continue; } + this.modules[6][c] = (c % 2 == 0); + } + }, setupPositionAdjustPattern: function () { + var pos = QRUtil.getPatternPosition(this.typeNumber); for (var i = 0; i < pos.length; i++) { + for (var j = 0; j < pos.length; j++) { + var row = pos[i]; var col = pos[j]; if (this.modules[row][col] != null) { continue; } + for (var r = -2; r <= 2; r++) { for (var c = -2; c <= 2; c++) { if (r == -2 || r == 2 || c == -2 || c == 2 || (r == 0 && c == 0)) { this.modules[row + r][col + c] = true; } else { this.modules[row + r][col + c] = false; } } } + } + } + }, setupTypeNumber: function (test) { + var bits = QRUtil.getBCHTypeNumber(this.typeNumber); for (var i = 0; i < 18; i++) { var mod = (!test && ((bits >> i) & 1) == 1); this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod; } + for (var i = 0; i < 18; i++) { var mod = (!test && ((bits >> i) & 1) == 1); this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod; } + }, setupTypeInfo: function (test, maskPattern) { + var data = (this.errorCorrectLevel << 3) | maskPattern; var bits = QRUtil.getBCHTypeInfo(data); for (var i = 0; i < 15; i++) { var mod = (!test && ((bits >> i) & 1) == 1); if (i < 6) { this.modules[i][8] = mod; } else if (i < 8) { this.modules[i + 1][8] = mod; } else { this.modules[this.moduleCount - 15 + i][8] = mod; } } + for (var i = 0; i < 15; i++) { var mod = (!test && ((bits >> i) & 1) == 1); if (i < 8) { this.modules[8][this.moduleCount - i - 1] = mod; } else if (i < 9) { this.modules[8][15 - i - 1 + 1] = mod; } else { this.modules[8][15 - i - 1] = mod; } } + this.modules[this.moduleCount - 8][8] = (!test); + }, mapData: function (data, maskPattern) { + var inc = -1; var row = this.moduleCount - 1; var bitIndex = 7; var byteIndex = 0; for (var col = this.moduleCount - 1; col > 0; col -= 2) { + if (col == 6) col--; while (true) { + for (var c = 0; c < 2; c++) { + if (this.modules[row][col - c] == null) { + var dark = false; if (byteIndex < data.length) { dark = (((data[byteIndex] >>> bitIndex) & 1) == 1); } + var mask = QRUtil.getMask(maskPattern, row, col - c); if (mask) { dark = !dark; } + this.modules[row][col - c] = dark; bitIndex--; if (bitIndex == -1) { byteIndex++; bitIndex = 7; } + } + } + row += inc; if (row < 0 || this.moduleCount <= row) { row -= inc; inc = -inc; break; } + } + } + } + }; QRCodeModel.PAD0 = 0xEC; QRCodeModel.PAD1 = 0x11; QRCodeModel.createData = function (typeNumber, errorCorrectLevel, dataList) { + var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel); var buffer = new QRBitBuffer(); for (var i = 0; i < dataList.length; i++) { var data = dataList[i]; buffer.put(data.mode, 4); buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber)); data.write(buffer); } + var totalDataCount = 0; for (var i = 0; i < rsBlocks.length; i++) { totalDataCount += rsBlocks[i].dataCount; } + if (buffer.getLengthInBits() > totalDataCount * 8) { + throw new Error("code length overflow. (" + + buffer.getLengthInBits() + + ">" + + totalDataCount * 8 + + ")"); + } + if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) { buffer.put(0, 4); } + while (buffer.getLengthInBits() % 8 != 0) { buffer.putBit(false); } + while (true) { + if (buffer.getLengthInBits() >= totalDataCount * 8) { break; } + buffer.put(QRCodeModel.PAD0, 8); if (buffer.getLengthInBits() >= totalDataCount * 8) { break; } + buffer.put(QRCodeModel.PAD1, 8); + } + return QRCodeModel.createBytes(buffer, rsBlocks); + }; QRCodeModel.createBytes = function (buffer, rsBlocks) { + var offset = 0; var maxDcCount = 0; var maxEcCount = 0; var dcdata = new Array(rsBlocks.length); var ecdata = new Array(rsBlocks.length); for (var r = 0; r < rsBlocks.length; r++) { + var dcCount = rsBlocks[r].dataCount; var 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++) { dcdata[r][i] = 0xff & buffer.buffer[i + offset]; } + offset += dcCount; var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount); var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1); var modPoly = rawPoly.mod(rsPoly); ecdata[r] = new Array(rsPoly.getLength() - 1); for (var i = 0; i < ecdata[r].length; i++) { var modIndex = i + modPoly.getLength() - ecdata[r].length; ecdata[r][i] = (modIndex >= 0) ? modPoly.get(modIndex) : 0; } + } + var totalCodeCount = 0; for (var i = 0; i < rsBlocks.length; i++) { totalCodeCount += rsBlocks[i].totalCount; } + var data = new Array(totalCodeCount); var index = 0; for (var i = 0; i < maxDcCount; i++) { for (var r = 0; r < rsBlocks.length; r++) { if (i < dcdata[r].length) { data[index++] = dcdata[r][i]; } } } + for (var i = 0; i < maxEcCount; i++) { for (var r = 0; r < rsBlocks.length; r++) { if (i < ecdata[r].length) { data[index++] = ecdata[r][i]; } } } + return data; + }; var QRMode = { MODE_NUMBER: 1 << 0, MODE_ALPHA_NUM: 1 << 1, MODE_8BIT_BYTE: 1 << 2, MODE_KANJI: 1 << 3 }; var QRErrorCorrectLevel = { L: 1, M: 0, Q: 3, H: 2 }; var QRMaskPattern = { PATTERN000: 0, PATTERN001: 1, PATTERN010: 2, PATTERN011: 3, PATTERN100: 4, PATTERN101: 5, PATTERN110: 6, PATTERN111: 7 }; var QRUtil = { + PATTERN_POSITION_TABLE: [[], [6, 18], [6, 22], [6, 26], [6, 30], [6, 34], [6, 22, 38], [6, 24, 42], [6, 26, 46], [6, 28, 50], [6, 30, 54], [6, 32, 58], [6, 34, 62], [6, 26, 46, 66], [6, 26, 48, 70], [6, 26, 50, 74], [6, 30, 54, 78], [6, 30, 56, 82], [6, 30, 58, 86], [6, 34, 62, 90], [6, 28, 50, 72, 94], [6, 26, 50, 74, 98], [6, 30, 54, 78, 102], [6, 28, 54, 80, 106], [6, 32, 58, 84, 110], [6, 30, 58, 86, 114], [6, 34, 62, 90, 118], [6, 26, 50, 74, 98, 122], [6, 30, 54, 78, 102, 126], [6, 26, 52, 78, 104, 130], [6, 30, 56, 82, 108, 134], [6, 34, 60, 86, 112, 138], [6, 30, 58, 86, 114, 142], [6, 34, 62, 90, 118, 146], [6, 30, 54, 78, 102, 126, 150], [6, 24, 50, 76, 102, 128, 154], [6, 28, 54, 80, 106, 132, 158], [6, 32, 58, 84, 110, 136, 162], [6, 26, 54, 82, 110, 138, 166], [6, 30, 58, 86, 114, 142, 170]], 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), getBCHTypeInfo: function (data) { + var d = data << 10; while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) { d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15))); } + return ((data << 10) | d) ^ QRUtil.G15_MASK; + }, getBCHTypeNumber: function (data) { + var d = data << 12; while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) { d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18))); } + return (data << 12) | d; + }, getBCHDigit: function (data) { + var digit = 0; while (data != 0) { digit++; data >>>= 1; } + return digit; + }, getPatternPosition: function (typeNumber) { return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1]; }, getMask: function (maskPattern, i, j) { switch (maskPattern) { case QRMaskPattern.PATTERN000: return (i + j) % 2 == 0; case QRMaskPattern.PATTERN001: return i % 2 == 0; case QRMaskPattern.PATTERN010: return j % 3 == 0; case QRMaskPattern.PATTERN011: return (i + j) % 3 == 0; case QRMaskPattern.PATTERN100: return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0; case QRMaskPattern.PATTERN101: return (i * j) % 2 + (i * j) % 3 == 0; case QRMaskPattern.PATTERN110: return ((i * j) % 2 + (i * j) % 3) % 2 == 0; case QRMaskPattern.PATTERN111: return ((i * j) % 3 + (i + j) % 2) % 2 == 0; default: throw new Error("bad maskPattern:" + maskPattern); } }, getErrorCorrectPolynomial: function (errorCorrectLength) { + var a = new QRPolynomial([1], 0); for (var i = 0; i < errorCorrectLength; i++) { a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0)); } + return a; + }, getLengthInBits: function (mode, type) { if (1 <= type && type < 10) { switch (mode) { case QRMode.MODE_NUMBER: return 10; case QRMode.MODE_ALPHA_NUM: return 9; case QRMode.MODE_8BIT_BYTE: return 8; case QRMode.MODE_KANJI: return 8; default: throw new Error("mode:" + mode); } } else if (type < 27) { switch (mode) { case QRMode.MODE_NUMBER: return 12; case QRMode.MODE_ALPHA_NUM: return 11; case QRMode.MODE_8BIT_BYTE: return 16; case QRMode.MODE_KANJI: return 10; default: throw new Error("mode:" + mode); } } else if (type < 41) { switch (mode) { case QRMode.MODE_NUMBER: return 14; case QRMode.MODE_ALPHA_NUM: return 13; case QRMode.MODE_8BIT_BYTE: return 16; case QRMode.MODE_KANJI: return 12; default: throw new Error("mode:" + mode); } } else { throw new Error("type:" + type); } }, getLostPoint: function (qrCode) { + var moduleCount = qrCode.getModuleCount(); var lostPoint = 0; for (var row = 0; row < moduleCount; row++) { + for (var col = 0; col < moduleCount; col++) { + var sameCount = 0; var dark = qrCode.isDark(row, col); for (var r = -1; r <= 1; r++) { + if (row + r < 0 || moduleCount <= row + r) { continue; } + for (var c = -1; c <= 1; c++) { + if (col + c < 0 || moduleCount <= col + c) { continue; } + if (r == 0 && c == 0) { continue; } + if (dark == qrCode.isDark(row + r, col + c)) { sameCount++; } + } + } + if (sameCount > 5) { lostPoint += (3 + sameCount - 5); } + } + } + for (var row = 0; row < moduleCount - 1; row++) { for (var col = 0; col < moduleCount - 1; col++) { var count = 0; if (qrCode.isDark(row, col)) count++; if (qrCode.isDark(row + 1, col)) count++; if (qrCode.isDark(row, col + 1)) count++; if (qrCode.isDark(row + 1, col + 1)) count++; if (count == 0 || count == 4) { lostPoint += 3; } } } + for (var row = 0; row < moduleCount; row++) { for (var col = 0; col < moduleCount - 6; col++) { 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++) { for (var row = 0; row < moduleCount - 6; row++) { 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; } } } + var darkCount = 0; for (var col = 0; col < moduleCount; col++) { for (var row = 0; row < moduleCount; row++) { if (qrCode.isDark(row, col)) { darkCount++; } } } + var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5; lostPoint += ratio * 10; return lostPoint; + } + }; var QRMath = { + glog: function (n) { + if (n < 1) { throw new Error("glog(" + n + ")"); } + return QRMath.LOG_TABLE[n]; + }, gexp: function (n) { + while (n < 0) { n += 255; } + while (n >= 256) { n -= 255; } + return QRMath.EXP_TABLE[n]; + }, EXP_TABLE: new Array(256), LOG_TABLE: new Array(256) + }; for (var i = 0; i < 8; i++) { QRMath.EXP_TABLE[i] = 1 << i; } + for (var i = 8; i < 256; i++) { QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] ^ QRMath.EXP_TABLE[i - 5] ^ QRMath.EXP_TABLE[i - 6] ^ QRMath.EXP_TABLE[i - 8]; } + for (var i = 0; i < 255; i++) { QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i; } + function QRPolynomial(num, shift) { + if (num.length == undefined) { throw new Error(num.length + "/" + shift); } + var offset = 0; while (offset < num.length && num[offset] == 0) { offset++; } + this.num = new Array(num.length - offset + shift); for (var i = 0; i < num.length - offset; i++) { this.num[i] = num[i + offset]; } + } + QRPolynomial.prototype = { + get: function (index) { return this.num[index]; }, getLength: function () { return this.num.length; }, multiply: function (e) { + var num = new Array(this.getLength() + e.getLength() - 1); for (var i = 0; i < this.getLength(); i++) { for (var j = 0; j < e.getLength(); j++) { num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i)) + QRMath.glog(e.get(j))); } } + return new QRPolynomial(num, 0); + }, mod: function (e) { + if (this.getLength() - e.getLength() < 0) { return this; } + var ratio = QRMath.glog(this.get(0)) - QRMath.glog(e.get(0)); var num = new Array(this.getLength()); for (var i = 0; i < this.getLength(); i++) { num[i] = this.get(i); } + for (var i = 0; i < e.getLength(); i++) { num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio); } + return new QRPolynomial(num, 0).mod(e); + } + }; function QRRSBlock(totalCount, dataCount) { this.totalCount = totalCount; this.dataCount = dataCount; } + QRRSBlock.RS_BLOCK_TABLE = [[1, 26, 19], [1, 26, 16], [1, 26, 13], [1, 26, 9], [1, 44, 34], [1, 44, 28], [1, 44, 22], [1, 44, 16], [1, 70, 55], [1, 70, 44], [2, 35, 17], [2, 35, 13], [1, 100, 80], [2, 50, 32], [2, 50, 24], [4, 25, 9], [1, 134, 108], [2, 67, 43], [2, 33, 15, 2, 34, 16], [2, 33, 11, 2, 34, 12], [2, 86, 68], [4, 43, 27], [4, 43, 19], [4, 43, 15], [2, 98, 78], [4, 49, 31], [2, 32, 14, 4, 33, 15], [4, 39, 13, 1, 40, 14], [2, 121, 97], [2, 60, 38, 2, 61, 39], [4, 40, 18, 2, 41, 19], [4, 40, 14, 2, 41, 15], [2, 146, 116], [3, 58, 36, 2, 59, 37], [4, 36, 16, 4, 37, 17], [4, 36, 12, 4, 37, 13], [2, 86, 68, 2, 87, 69], [4, 69, 43, 1, 70, 44], [6, 43, 19, 2, 44, 20], [6, 43, 15, 2, 44, 16], [4, 101, 81], [1, 80, 50, 4, 81, 51], [4, 50, 22, 4, 51, 23], [3, 36, 12, 8, 37, 13], [2, 116, 92, 2, 117, 93], [6, 58, 36, 2, 59, 37], [4, 46, 20, 6, 47, 21], [7, 42, 14, 4, 43, 15], [4, 133, 107], [8, 59, 37, 1, 60, 38], [8, 44, 20, 4, 45, 21], [12, 33, 11, 4, 34, 12], [3, 145, 115, 1, 146, 116], [4, 64, 40, 5, 65, 41], [11, 36, 16, 5, 37, 17], [11, 36, 12, 5, 37, 13], [5, 109, 87, 1, 110, 88], [5, 65, 41, 5, 66, 42], [5, 54, 24, 7, 55, 25], [11, 36, 12], [5, 122, 98, 1, 123, 99], [7, 73, 45, 3, 74, 46], [15, 43, 19, 2, 44, 20], [3, 45, 15, 13, 46, 16], [1, 135, 107, 5, 136, 108], [10, 74, 46, 1, 75, 47], [1, 50, 22, 15, 51, 23], [2, 42, 14, 17, 43, 15], [5, 150, 120, 1, 151, 121], [9, 69, 43, 4, 70, 44], [17, 50, 22, 1, 51, 23], [2, 42, 14, 19, 43, 15], [3, 141, 113, 4, 142, 114], [3, 70, 44, 11, 71, 45], [17, 47, 21, 4, 48, 22], [9, 39, 13, 16, 40, 14], [3, 135, 107, 5, 136, 108], [3, 67, 41, 13, 68, 42], [15, 54, 24, 5, 55, 25], [15, 43, 15, 10, 44, 16], [4, 144, 116, 4, 145, 117], [17, 68, 42], [17, 50, 22, 6, 51, 23], [19, 46, 16, 6, 47, 17], [2, 139, 111, 7, 140, 112], [17, 74, 46], [7, 54, 24, 16, 55, 25], [34, 37, 13], [4, 151, 121, 5, 152, 122], [4, 75, 47, 14, 76, 48], [11, 54, 24, 14, 55, 25], [16, 45, 15, 14, 46, 16], [6, 147, 117, 4, 148, 118], [6, 73, 45, 14, 74, 46], [11, 54, 24, 16, 55, 25], [30, 46, 16, 2, 47, 17], [8, 132, 106, 4, 133, 107], [8, 75, 47, 13, 76, 48], [7, 54, 24, 22, 55, 25], [22, 45, 15, 13, 46, 16], [10, 142, 114, 2, 143, 115], [19, 74, 46, 4, 75, 47], [28, 50, 22, 6, 51, 23], [33, 46, 16, 4, 47, 17], [8, 152, 122, 4, 153, 123], [22, 73, 45, 3, 74, 46], [8, 53, 23, 26, 54, 24], [12, 45, 15, 28, 46, 16], [3, 147, 117, 10, 148, 118], [3, 73, 45, 23, 74, 46], [4, 54, 24, 31, 55, 25], [11, 45, 15, 31, 46, 16], [7, 146, 116, 7, 147, 117], [21, 73, 45, 7, 74, 46], [1, 53, 23, 37, 54, 24], [19, 45, 15, 26, 46, 16], [5, 145, 115, 10, 146, 116], [19, 75, 47, 10, 76, 48], [15, 54, 24, 25, 55, 25], [23, 45, 15, 25, 46, 16], [13, 145, 115, 3, 146, 116], [2, 74, 46, 29, 75, 47], [42, 54, 24, 1, 55, 25], [23, 45, 15, 28, 46, 16], [17, 145, 115], [10, 74, 46, 23, 75, 47], [10, 54, 24, 35, 55, 25], [19, 45, 15, 35, 46, 16], [17, 145, 115, 1, 146, 116], [14, 74, 46, 21, 75, 47], [29, 54, 24, 19, 55, 25], [11, 45, 15, 46, 46, 16], [13, 145, 115, 6, 146, 116], [14, 74, 46, 23, 75, 47], [44, 54, 24, 7, 55, 25], [59, 46, 16, 1, 47, 17], [12, 151, 121, 7, 152, 122], [12, 75, 47, 26, 76, 48], [39, 54, 24, 14, 55, 25], [22, 45, 15, 41, 46, 16], [6, 151, 121, 14, 152, 122], [6, 75, 47, 34, 76, 48], [46, 54, 24, 10, 55, 25], [2, 45, 15, 64, 46, 16], [17, 152, 122, 4, 153, 123], [29, 74, 46, 14, 75, 47], [49, 54, 24, 10, 55, 25], [24, 45, 15, 46, 46, 16], [4, 152, 122, 18, 153, 123], [13, 74, 46, 32, 75, 47], [48, 54, 24, 14, 55, 25], [42, 45, 15, 32, 46, 16], [20, 147, 117, 4, 148, 118], [40, 75, 47, 7, 76, 48], [43, 54, 24, 22, 55, 25], [10, 45, 15, 67, 46, 16], [19, 148, 118, 6, 149, 119], [18, 75, 47, 31, 76, 48], [34, 54, 24, 34, 55, 25], [20, 45, 15, 61, 46, 16]]; QRRSBlock.getRSBlocks = function (typeNumber, errorCorrectLevel) { + var rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel); if (rsBlock == undefined) { throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel); } + var length = rsBlock.length / 3; var list = []; for (var i = 0; i < length; i++) { var count = rsBlock[i * 3 + 0]; var totalCount = rsBlock[i * 3 + 1]; var dataCount = rsBlock[i * 3 + 2]; for (var j = 0; j < count; j++) { list.push(new QRRSBlock(totalCount, dataCount)); } } + return list; + }; QRRSBlock.getRsBlockTable = function (typeNumber, errorCorrectLevel) { switch (errorCorrectLevel) { case QRErrorCorrectLevel.L: return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0]; case QRErrorCorrectLevel.M: return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1]; case QRErrorCorrectLevel.Q: return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2]; case QRErrorCorrectLevel.H: return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3]; default: return undefined; } }; function QRBitBuffer() { this.buffer = []; this.length = 0; } + QRBitBuffer.prototype = { + get: function (index) { var bufIndex = Math.floor(index / 8); return ((this.buffer[bufIndex] >>> (7 - index % 8)) & 1) == 1; }, put: function (num, length) { for (var i = 0; i < length; i++) { this.putBit(((num >>> (length - i - 1)) & 1) == 1); } }, getLengthInBits: function () { return this.length; }, putBit: function (bit) { + var bufIndex = Math.floor(this.length / 8); if (this.buffer.length <= bufIndex) { this.buffer.push(0); } + if (bit) { this.buffer[bufIndex] |= (0x80 >>> (this.length % 8)); } + this.length++; + } + }; var QRCodeLimitLength = [[17, 14, 11, 7], [32, 26, 20, 14], [53, 42, 32, 24], [78, 62, 46, 34], [106, 84, 60, 44], [134, 106, 74, 58], [154, 122, 86, 64], [192, 152, 108, 84], [230, 180, 130, 98], [271, 213, 151, 119], [321, 251, 177, 137], [367, 287, 203, 155], [425, 331, 241, 177], [458, 362, 258, 194], [520, 412, 292, 220], [586, 450, 322, 250], [644, 504, 364, 280], [718, 560, 394, 310], [792, 624, 442, 338], [858, 666, 482, 382], [929, 711, 509, 403], [1003, 779, 565, 439], [1091, 857, 611, 461], [1171, 911, 661, 511], [1273, 997, 715, 535], [1367, 1059, 751, 593], [1465, 1125, 805, 625], [1528, 1190, 868, 658], [1628, 1264, 908, 698], [1732, 1370, 982, 742], [1840, 1452, 1030, 790], [1952, 1538, 1112, 842], [2068, 1628, 1168, 898], [2188, 1722, 1228, 958], [2303, 1809, 1283, 983], [2431, 1911, 1351, 1051], [2563, 1989, 1423, 1093], [2699, 2099, 1499, 1139], [2809, 2213, 1579, 1219], [2953, 2331, 1663, 1273]]; + + function _isSupportCanvas() { + return typeof CanvasRenderingContext2D != "undefined"; + } + + var svgDrawer = (function () { + + var Drawing = function (el, htOption) { + this._el = el; + this._htOption = htOption; + }; + + Drawing.prototype.draw = function (oQRCode) { + var _htOption = this._htOption; + var _el = this._el; + var nCount = oQRCode.getModuleCount(); + + this.clear(); + + function makeSVG(tag, attrs) { + var el = document.createElementNS('http://www.w3.org/2000/svg', tag); + for (var k in attrs) + if (attrs.hasOwnProperty(k)) el.setAttribute(k, attrs[k]); + return el; + } + + var svg = makeSVG("svg", { 'viewBox': '0 0 ' + String(nCount) + " " + String(nCount), 'width': '100%', 'height': '100%', 'fill': _htOption.colorLight }); + svg.setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:xlink", "http://www.w3.org/1999/xlink"); + _el.appendChild(svg); + + svg.appendChild(makeSVG("rect", { "fill": _htOption.colorLight, "width": "100%", "height": "100%" })); + svg.appendChild(makeSVG("rect", { "fill": _htOption.colorDark, "width": "1", "height": "1", "id": "template" })); + + for (var row = 0; row < nCount; row++) { + for (var col = 0; col < nCount; col++) { + if (oQRCode.isDark(row, col)) { + var child = makeSVG("use", { "x": String(col), "y": String(row) }); + child.setAttributeNS("http://www.w3.org/1999/xlink", "href", "#template") + svg.appendChild(child); + } + } + } + }; + Drawing.prototype.clear = function () { + while (this._el.hasChildNodes()) + this._el.removeChild(this._el.lastChild); + }; + return Drawing; + })(); + + var useSVG = document.documentElement.tagName.toLowerCase() === "svg"; + + // Drawing in DOM by using Table tag + var Drawing = useSVG ? svgDrawer : !_isSupportCanvas() ? (function () { + var Drawing = function (el, htOption) { + this._el = el; + this._htOption = htOption; + }; + + /** + * Draw the QRCode + * + * @param {QRCode} oQRCode + */ + Drawing.prototype.draw = function (oQRCode) { + var _htOption = this._htOption; + var _el = this._el; + var nCount = oQRCode.getModuleCount(); + var nWidth = Math.floor(_htOption.width / nCount); + var nHeight = Math.floor(_htOption.height / nCount); + var aHTML = ['']; + + for (var row = 0; row < nCount; row++) { + aHTML.push(''); + + for (var col = 0; col < nCount; col++) { + aHTML.push(''); + } + + aHTML.push(''); + } + + aHTML.push('
    '); + _el.innerHTML = aHTML.join(''); + + // Fix the margin values as real size. + var elTable = _el.childNodes[0]; + var nLeftMarginTable = (_htOption.width - elTable.offsetWidth) / 2; + var nTopMarginTable = (_htOption.height - elTable.offsetHeight) / 2; + + if (nLeftMarginTable > 0 && nTopMarginTable > 0) { + elTable.style.margin = nTopMarginTable + "px " + nLeftMarginTable + "px"; + } + }; + + /** + * Clear the QRCode + */ + Drawing.prototype.clear = function () { + this._el.innerHTML = ''; + }; + + return Drawing; + })() : (function () { // Drawing in Canvas + function _onMakeImage() { + this._elImage.src = this._elCanvas.toDataURL("image/png"); + this._elImage.style.display = "block"; + this._elCanvas.style.display = "none"; + } + + /** + * Check whether the user's browser supports Data URI or not + * + * @private + * @param {Function} fSuccess Occurs if it supports Data URI + * @param {Function} fFail Occurs if it doesn't support Data URI + */ + function _safeSetDataURI(fSuccess, fFail) { + var self = this; + self._fFail = fFail; + self._fSuccess = fSuccess; + + // Check it just once + if (self._bSupportDataURI === null) { + var el = document.createElement("img"); + var fOnError = function () { + self._bSupportDataURI = false; + + if (self._fFail) { + self._fFail.call(self); + } + }; + var fOnSuccess = function () { + self._bSupportDataURI = true; + + if (self._fSuccess) { + self._fSuccess.call(self); + } + }; + + el.onabort = fOnError; + el.onerror = fOnError; + el.onload = fOnSuccess; + el.src = "data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="; // the Image contains 1px data. + return; + } else if (self._bSupportDataURI === true && self._fSuccess) { + self._fSuccess.call(self); + } else if (self._bSupportDataURI === false && self._fFail) { + self._fFail.call(self); + } + }; + + /** + * Drawing QRCode by using canvas + * + * @constructor + * @param {HTMLElement} el + * @param {Object} htOption QRCode Options + */ + var Drawing = function (el, htOption) { + this._bIsPainted = false; + this._htOption = htOption; + this._elCanvas = document.createElement("canvas"); + this._elCanvas.width = htOption.width; + this._elCanvas.height = htOption.height; + el.appendChild(this._elCanvas); + this._el = el; + this._oContext = this._elCanvas.getContext("2d"); + this._bIsPainted = false; + this._elImage = document.createElement("img"); + this._elImage.alt = "Scan me!"; + this._elImage.style.display = "none"; + this._el.appendChild(this._elImage); + this._bSupportDataURI = null; + }; + + /** + * Draw the QRCode + * + * @param {QRCode} oQRCode + */ + Drawing.prototype.draw = function (oQRCode) { + var _elImage = this._elImage; + var _oContext = this._oContext; + var _htOption = this._htOption; + + var nCount = oQRCode.getModuleCount(); + var nWidth = _htOption.width / nCount; + var nHeight = _htOption.height / nCount; + var nRoundedWidth = Math.round(nWidth); + var nRoundedHeight = Math.round(nHeight); + + _elImage.style.display = "none"; + this.clear(); + + for (var row = 0; row < nCount; row++) { + for (var col = 0; col < nCount; col++) { + var bIsDark = oQRCode.isDark(row, col); + var nLeft = col * nWidth; + var nTop = row * nHeight; + _oContext.strokeStyle = bIsDark ? _htOption.colorDark : _htOption.colorLight; + _oContext.lineWidth = 1; + _oContext.fillStyle = bIsDark ? _htOption.colorDark : _htOption.colorLight; + _oContext.fillRect(nLeft, nTop, nWidth, nHeight); + + // 안티 앨리어싱 방지 처리 + _oContext.strokeRect( + Math.floor(nLeft) + 0.5, + Math.floor(nTop) + 0.5, + nRoundedWidth, + nRoundedHeight + ); + + _oContext.strokeRect( + Math.ceil(nLeft) - 0.5, + Math.ceil(nTop) - 0.5, + nRoundedWidth, + nRoundedHeight + ); + } + } + + this._bIsPainted = true; + }; + + /** + * Make the image from Canvas if the browser supports Data URI. + */ + Drawing.prototype.makeImage = function () { + if (this._bIsPainted) { + _safeSetDataURI.call(this, _onMakeImage); + } + }; + + /** + * Return whether the QRCode is painted or not + * + * @return {Boolean} + */ + Drawing.prototype.isPainted = function () { + return this._bIsPainted; + }; + + /** + * Clear the QRCode + */ + Drawing.prototype.clear = function () { + this._oContext.clearRect(0, 0, this._elCanvas.width, this._elCanvas.height); + this._bIsPainted = false; + }; + + /** + * @private + * @param {Number} nNumber + */ + Drawing.prototype.round = function (nNumber) { + if (!nNumber) { + return nNumber; + } + + return Math.floor(nNumber * 1000) / 1000; + }; + + return Drawing; + })(); + + /** + * Get the type by string length + * + * @private + * @param {String} sText + * @param {Number} nCorrectLevel + * @return {Number} type + */ + function _getTypeNumber(sText, nCorrectLevel) { + var nType = 1; + var length = _getUTF8Length(sText); + + for (var i = 0, len = QRCodeLimitLength.length; i <= len; i++) { + var nLimit = 0; + + switch (nCorrectLevel) { + case QRErrorCorrectLevel.L: + nLimit = QRCodeLimitLength[i][0]; + break; + case QRErrorCorrectLevel.M: + nLimit = QRCodeLimitLength[i][1]; + break; + case QRErrorCorrectLevel.Q: + nLimit = QRCodeLimitLength[i][2]; + break; + case QRErrorCorrectLevel.H: + nLimit = QRCodeLimitLength[i][3]; + break; + } + + if (length <= nLimit) { + break; + } else { + nType++; + } + } + + if (nType > QRCodeLimitLength.length) { + throw new Error("Too long data"); + } + + return nType; + } + + function _getUTF8Length(sText) { + var replacedText = encodeURI(sText).toString().replace(/\%[0-9a-fA-F]{2}/g, 'a'); + return replacedText.length + (replacedText.length != sText ? 3 : 0); + } + + /** + * @class QRCode + * @constructor + * @example + * new QRCode(document.getElementById("test"), "http://jindo.dev.naver.com/collie"); + * + * @example + * var oQRCode = new QRCode("test", { + * text : "http://naver.com", + * width : 128, + * height : 128 + * }); + * + * oQRCode.clear(); // Clear the QRCode. + * oQRCode.makeCode("http://map.naver.com"); // Re-create the QRCode. + * + * @param {HTMLElement|String} el target element or 'id' attribute of element. + * @param {Object|String} vOption + * @param {String} vOption.text QRCode link data + * @param {Number} [vOption.width=256] + * @param {Number} [vOption.height=256] + * @param {String} [vOption.colorDark="#000000"] + * @param {String} [vOption.colorLight="#ffffff"] + * @param {QRCode.CorrectLevel} [vOption.correctLevel=QRCode.CorrectLevel.H] [L|M|Q|H] + */ + QRCode = function (el, vOption) { + this._htOption = { + width: 256, + height: 256, + typeNumber: 4, + colorDark: "#000000", + colorLight: "#ffffff", + correctLevel: QRErrorCorrectLevel.H + }; + + if (typeof vOption === 'string') { + vOption = { + text: vOption + }; + } + + // Overwrites options + if (vOption) { + for (var i in vOption) { + this._htOption[i] = vOption[i]; + } + } + + if (typeof el == "string") { + el = document.getElementById(el); + } + + if (this._htOption.useSVG) { + Drawing = svgDrawer; + } + + this._el = el; + this._oQRCode = null; + this._oDrawing = new Drawing(this._el, this._htOption); + + if (this._htOption.text) { + this.makeCode(this._htOption.text); + } + }; + + /** + * Make the QRCode + * + * @param {String} sText link data + */ + QRCode.prototype.makeCode = function (sText) { + this._oQRCode = new QRCodeModel(_getTypeNumber(sText, this._htOption.correctLevel), this._htOption.correctLevel); + this._oQRCode.addData(sText); + this._oQRCode.make(); + this._el.title = sText; + this._oDrawing.draw(this._oQRCode); + this.makeImage(); + }; + + /** + * Make the Image from Canvas element + * - It occurs automatically + * + * @private + */ + QRCode.prototype.makeImage = function () { + if (typeof this._oDrawing.makeImage == "function") { + this._oDrawing.makeImage(); + } + }; + + /** + * Clear the QRCode + */ + QRCode.prototype.clear = function () { + this._oDrawing.clear(); + }; + + /** + * @name QRCode.CorrectLevel + */ + QRCode.CorrectLevel = QRErrorCorrectLevel; +})(); + +export { QRCode }; \ No newline at end of file -- cgit v1.2.3