js 实现URL 转换成为二维码

墨蓝 2021-10-29 15:44 618阅读 0赞

首先想到的是引用qrcode.js (二维码生成库)

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][]

/*from tccdn minify at 2014-6-4 14:59:43,file：/cn/c/c/qrcode.js*/
    /**
     * @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 <a href="http://www.d-project.com/" target="_blank">http://www.d-project.com/</a>
     * @see <a href="http://jeromeetienne.github.com/jquery-qrcode/" target="_blank">http://jeromeetienne.github.com/jquery-qrcode/</a>
     */
    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 = [];
        }
    
    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];
    }
    
    function QRRSBlock(totalCount, dataCount) {
        this.totalCount = totalCount, this.dataCount = dataCount;
    }
    
    function QRBitBuffer() {
        this.buffer = [], this.length = 0;
    }
    
        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(!1, 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),
                this.typeNumber >= 7 && this.setupTypeNumber(test),
                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;
    <= 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] = !0 : this.modules[row + r][col + c] = !1;
                    }
                }
            },
            "getBestMaskPattern": function() {
                var minLostPoint = 0, pattern = 0;
                for (var i = 0; i < 8; i++) {
                    this.makeImpl(!0, 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), 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, dark = this.modules[row][col];
                        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], col = pos[j];
                    if (this.modules[row][col] != null) continue;
                    for (var r = -2; r <= 2; r++) for (var c = -2; c <= 2; c++) r == -2 || r == 2 || c == -2 || c == 2 || r == 0 && c == 0 ? this.modules[row + r][col + c] = !0 : this.modules[row + r][col + c] = !1;
                }
            },
            "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, bits = QRUtil.getBCHTypeInfo(data);
                for (var i = 0; i < 15; i++) {
                    var mod = !test && (bits >> i & 1) == 1;
                    i < 6 ? this.modules[i][8] = mod : i < 8 ? this.modules[i + 1][8] = mod : this.modules[this.moduleCount - 15 + i][8] = mod;
                }
                for (var i = 0; i < 15; i++) {
                    var mod = !test && (bits >> i & 1) == 1;
                    i < 8 ? this.modules[8][this.moduleCount - i - 1] = mod : i < 9 ? this.modules[8][15 - i - 1 + 1] = mod : this.modules[8][15 - i - 1] = mod;
                }
                this.modules[this.moduleCount - 8][8] = !test;
            },
            "mapData": function(data, maskPattern) {
                var inc = -1, row = this.moduleCount - 1, bitIndex = 7, byteIndex = 0;
                for (var col = this.moduleCount - 1; col > 0; col -= 2) {
                    col == 6 && col--;
                    for (;;) {
                        for (var c = 0; c < 2; c++) if (this.modules[row][col - c] == null) {
                            var dark = !1;
                            byteIndex < data.length && (dark = (data[byteIndex] >>> bitIndex & 1) == 1);
                            var mask = QRUtil.getMask(maskPattern, row, col - c);
                            mask && (dark = !dark), this.modules[row][col - c] = dark, bitIndex--, bitIndex == -1 && (byteIndex++, bitIndex = 7);
                        }
                        row += inc;
                        if (row < 0 || this.moduleCount <= row) {
                            row -= inc, inc = -inc;
                            break;
                        }
                    }
                }
            }
        }, QRCodeModel.PAD0 = 236, QRCodeModel.PAD1 = 17, QRCodeModel.createData = function(typeNumber, errorCorrectLevel, dataList) {
            var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel), 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 + ")");
            buffer.getLengthInBits() + 4 <= totalDataCount * 8 && buffer.put(0, 4);
            while (buffer.getLengthInBits() % 8 != 0) buffer.putBit(!1);
            for (;;) {
                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, maxDcCount = 0, maxEcCount = 0, dcdata = new Array(rsBlocks.length), ecdata = new Array(rsBlocks.length);
            for (var r = 0; r < rsBlocks.length; r++) {
                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++) dcdata[r][i] = 255 & buffer.buffer[i + offset];
                offset += dcCount;
                var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount), rawPoly = new 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++) {
                    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), index = 0;
            for (var i = 0; i < maxDcCount; i++) for (var r = 0; r < rsBlocks.length; r++) i < dcdata[r].length && (data[index++] = dcdata[r][i]);
            for (var i = 0; i < maxEcCount; i++) for (var r = 0; r < rsBlocks.length; r++) i < ecdata[r].length && (data[index++] = ecdata[r][i]);
            return data;
        };
    
        var QRMode = {
            "MODE_NUMBER": 1,
            "MODE_ALPHA_NUM": 2,
            "MODE_8BIT_BYTE": 4,
            "MODE_KANJI": 8
        }, QRErrorCorrectLevel = {
            "L": 1,
            "M": 0,
            "Q": 3,
            "H": 2
        }, QRMaskPattern = {
            "PATTERN000": 0,
            "PATTERN001": 1,
            "PATTERN010": 2,
            "PATTERN011": 3,
            "PATTERN100": 4,
            "PATTERN101": 5,
            "PATTERN110": 6,
            "PATTERN111": 7
        }, 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": 1335,
            "G18": 7973,
            "G15_MASK": 21522,
            "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)) throw new Error("type:" + type);
                    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);
                    }
                }
            },
            "getLostPoint": function(qrCode) {
                var moduleCount = qrCode.getModuleCount(), lostPoint = 0;
                for (var row = 0; row < moduleCount; row++) for (var col = 0; col < moduleCount; col++) {
                    var sameCount = 0, 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;
                            dark == qrCode.isDark(row + r, col + c) && sameCount++;
                        }
                    }
                    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;
                    qrCode.isDark(row, col) && count++, qrCode.isDark(row + 1, col) && count++, qrCode.isDark(row, col + 1) && count++, 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++) 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++) 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++) qrCode.isDark(row, col) && darkCount++;
                var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
                return lostPoint += ratio * 10, lostPoint;
            }
        }, 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;
    
        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)), 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);
            }
        }, 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, list = [];
            for (var i = 0; i < length; i++) {
                var count = rsBlock[i * 3 + 0], totalCount = rsBlock[i * 3 + 1], 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;
            }
        }, 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);
                this.buffer.length <= bufIndex && this.buffer.push(0), bit && (this.buffer[bufIndex] |= 128 >>> 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";
        }
        
        // android 2.x doesn't support Data-URI spec
        function _getAndroid() {
            var android = false;
            var sAgent = navigator.userAgent;
            
            if (/android/i.test(sAgent)) { // android
                android = true;
                aMat = sAgent.toString().match(/android ([0-9]\.[0-9])/i);
                
                if (aMat && aMat[1]) {
                    android = parseFloat(aMat[1]);
                }
            }
            
            return android;
        }
        
        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();
                var nWidth = Math.floor(_htOption.width / nCount);
                var nHeight = Math.floor(_htOption.height / nCount);
    
                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.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(row), "y": String(col)});
                            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 = ['<table style="border:0;border-collapse:collapse;">'];
                
                for (var row = 0; row < nCount; row++) {
                    aHTML.push('<tr>');
                    
                    for (var col = 0; col < nCount; col++) {
                        aHTML.push('<td style="border:0;border-collapse:collapse;padding:0;margin:0;width:' + nWidth + 'px;height:' + nHeight + 'px;background-color:' + (oQRCode.isDark(row, col) ? _htOption.colorDark : _htOption.colorLight) + ';"></td>');
                    }
                    
                    aHTML.push('</tr>');
                }
                
                aHTML.push('</table>');
                _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";            
            }
            
            // Android 2.1 bug workaround
            // http://code.google.com/p/android/issues/detail?id=5141
            if (this._android && this._android <= 2.1) {
                var factor = 1 / window.devicePixelRatio;
                var drawImage = CanvasRenderingContext2D.prototype.drawImage; 
                CanvasRenderingContext2D.prototype.drawImage = function (image, sx, sy, sw, sh, dx, dy, dw, dh) {
                    if (("nodeName" in image) && /img/i.test(image.nodeName)) {
                        for (var i = arguments.length - 1; i >= 1; i--) {
                            arguments[i] = arguments[i] * factor;
                        }
                    } else if (typeof dw == "undefined") {
                        arguments[1] *= factor;
                        arguments[2] *= factor;
                        arguments[3] *= factor;
                        arguments[4] *= factor;
                    }
                    
                    drawImage.apply(this, arguments); 
                };
            }
            
            /**
             * 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) {
                            _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._android = _getAndroid();
            
                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);
            }
            
            this._android = _getAndroid();
            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
         * - Android below 3 doesn't support Data-URI spec.
         * 
         * @private
         */
        QRCode.prototype.makeImage = function () {
            if (typeof this._oDrawing.makeImage == "function" && (!this._android || this._android >= 3)) {
                this._oDrawing.makeImage();
            }
        };
        
        /**
         * Clear the QRCode
         */
        QRCode.prototype.clear = function () {
            this._oDrawing.clear();
        };
        
        /**
         * @name QRCode.CorrectLevel
         */
        QRCode.CorrectLevel = QRErrorCorrectLevel;
    })();

<!DOCTYPE html>
    <html>
    <head>
        <title></title>
        <meta charset="utf-8"/>
        <script src="js/qrcode.js"></script>
        <style>
            #qrcode{
         
                /*text-align: center;*/
                /*display: table-cell;*/
                /*width: 96px;*/
                /*height: 96px;*/
                /*vertical-align:middle;*/
                /*position: relative;*/
            }
        </style>
    </head>
    <body>
    <div id="qrcode">
    </div>
    
    <input type="text" id="getval"/> <button id="send">点击更换验证码</button>
    <script>
        window.onload =function(){
            var qrcode = new QRCode(document.getElementById("qrcode"), {
                width : 96,//设置宽高
                height : 96
            });
            qrcode.makeCode("http://www.baidu.com");
            document.getElementById("send").onclick =function(){
                qrcode.makeCode(document.getElementById("getval").value);
            }
        }
    </script>
    </body>
    </html>

转载于:https://www.cnblogs.com/win-lin08/p/9253238.html

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