Js生成二维码

qrcode.js

/*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 <= 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;' + 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;
})();

html

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <meta charset="utf-8"/>
    <script src="qrcode.js"></script>
    <style>
        #qrcode{
            /*text-align: center;*/
            /*display: table-cell;*/
            /* 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>

jquery.qrcode

html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <style media="screen">
        </style>
    </head>
    <body>
        <div id="qrDiv">


        </div>
        <div id='box'>

        </div>
    </body>
    <script src="https://cdn.bootcss.com/jquery/2.2.2/jquery.min.js"></script>
    <script src="./jquery.qrcode.min.js" type="text/javascript" charset="utf-8"></script>

    <script type="text/javascript">
    $("#qrDiv").qrcode({
         120, //宽度
        height:120, //高度
        text: "http://www.baidu.com/" //任意内容
    });
    //从 canvas 提取图片 image
function convertCanvasToImage(canvas) {
//新Image对象，可以理解为DOM
var image = new Image();
// canvas.toDataURL 返回的是一串Base64编码的URL，当然,浏览器自己肯定支持
// 指定格式 PNG
image.src = canvas.toDataURL("image/png");
return image;
}
//获取网页中的canvas对象
var mycanvas1=document.getElementsByTagName('canvas')[0];
//将转换后的img标签插入到html中
var img=convertCanvasToImage(mycanvas1);
$('#box').append(img);//imagQrDiv表示你要插入的容器id
    </script>
</html>

jquery.qrcode.min.js

(function(r){r.fn.qrcode=function(h){var s;function u(a){this.mode=s;this.data=a}function o(a,c){this.typeNumber=a;this.errorCorrectLevel=c;this.modules=null;this.moduleCount=0;this.dataCache=null;this.dataList=[]}function q(a,c){if(void 0==a.length)throw Error(a.length+"/"+c);for(var d=0;d<a.length&&0==a[d];)d++;this.num=Array(a.length-d+c);for(var b=0;b<a.length-d;b++)this.num[b]=a[b+d]}function p(a,c){this.totalCount=a;this.dataCount=c}function t(){this.buffer=[];this.length=0}u.prototype={getLength:function(){return this.data.length},
write:function(a){for(var c=0;c<this.data.length;c++)a.put(this.data.charCodeAt(c),8)}};o.prototype={addData:function(a){this.dataList.push(new u(a));this.dataCache=null},isDark:function(a,c){if(0>a||this.moduleCount<=a||0>c||this.moduleCount<=c)throw Error(a+","+c);return this.modules[a][c]},getModuleCount:function(){return this.moduleCount},make:function(){if(1>this.typeNumber){for(var a=1,a=1;40>a;a++){for(var c=p.getRSBlocks(a,this.errorCorrectLevel),d=new t,b=0,e=0;e<c.length;e++)b+=c[e].dataCount;
for(e=0;e<this.dataList.length;e++)c=this.dataList[e],d.put(c.mode,4),d.put(c.getLength(),j.getLengthInBits(c.mode,a)),c.write(d);if(d.getLengthInBits()<=8*b)break}this.typeNumber=a}this.makeImpl(!1,this.getBestMaskPattern())},makeImpl:function(a,c){this.moduleCount=4*this.typeNumber+17;this.modules=Array(this.moduleCount);for(var d=0;d<this.moduleCount;d++){this.modules[d]=Array(this.moduleCount);for(var b=0;b<this.moduleCount;b++)this.modules[d][b]=null}this.setupPositionProbePattern(0,0);this.setupPositionProbePattern(this.moduleCount-
7,0);this.setupPositionProbePattern(0,this.moduleCount-7);this.setupPositionAdjustPattern();this.setupTimingPattern();this.setupTypeInfo(a,c);7<=this.typeNumber&&this.setupTypeNumber(a);null==this.dataCache&&(this.dataCache=o.createData(this.typeNumber,this.errorCorrectLevel,this.dataList));this.mapData(this.dataCache,c)},setupPositionProbePattern:function(a,c){for(var d=-1;7>=d;d++)if(!(-1>=a+d||this.moduleCount<=a+d))for(var b=-1;7>=b;b++)-1>=c+b||this.moduleCount<=c+b||(this.modules[a+d][c+b]=
0<=d&&6>=d&&(0==b||6==b)||0<=b&&6>=b&&(0==d||6==d)||2<=d&&4>=d&&2<=b&&4>=b?!0:!1)},getBestMaskPattern:function(){for(var a=0,c=0,d=0;8>d;d++){this.makeImpl(!0,d);var b=j.getLostPoint(this);if(0==d||a>b)a=b,c=d}return c},createMovieClip:function(a,c,d){a=a.createEmptyMovieClip(c,d);this.make();for(c=0;c<this.modules.length;c++)for(var d=1*c,b=0;b<this.modules[c].length;b++){var e=1*b;this.modules[c][b]&&(a.beginFill(0,100),a.moveTo(e,d),a.lineTo(e+1,d),a.lineTo(e+1,d+1),a.lineTo(e,d+1),a.endFill())}return a},
setupTimingPattern:function(){for(var a=8;a<this.moduleCount-8;a++)null==this.modules[a][6]&&(this.modules[a][6]=0==a%2);for(a=8;a<this.moduleCount-8;a++)null==this.modules[6][a]&&(this.modules[6][a]=0==a%2)},setupPositionAdjustPattern:function(){for(var a=j.getPatternPosition(this.typeNumber),c=0;c<a.length;c++)for(var d=0;d<a.length;d++){var b=a[c],e=a[d];if(null==this.modules[b][e])for(var f=-2;2>=f;f++)for(var i=-2;2>=i;i++)this.modules[b+f][e+i]=-2==f||2==f||-2==i||2==i||0==f&&0==i?!0:!1}},setupTypeNumber:function(a){for(var c=
j.getBCHTypeNumber(this.typeNumber),d=0;18>d;d++){var b=!a&&1==(c>>d&1);this.modules[Math.floor(d/3)][d%3+this.moduleCount-8-3]=b}for(d=0;18>d;d++)b=!a&&1==(c>>d&1),this.modules[d%3+this.moduleCount-8-3][Math.floor(d/3)]=b},setupTypeInfo:function(a,c){for(var d=j.getBCHTypeInfo(this.errorCorrectLevel<<3|c),b=0;15>b;b++){var e=!a&&1==(d>>b&1);6>b?this.modules[b][8]=e:8>b?this.modules[b+1][8]=e:this.modules[this.moduleCount-15+b][8]=e}for(b=0;15>b;b++)e=!a&&1==(d>>b&1),8>b?this.modules[8][this.moduleCount-
b-1]=e:9>b?this.modules[8][15-b-1+1]=e:this.modules[8][15-b-1]=e;this.modules[this.moduleCount-8][8]=!a},mapData:function(a,c){for(var d=-1,b=this.moduleCount-1,e=7,f=0,i=this.moduleCount-1;0<i;i-=2)for(6==i&&i--;;){for(var g=0;2>g;g++)if(null==this.modules[b][i-g]){var n=!1;f<a.length&&(n=1==(a[f]>>>e&1));j.getMask(c,b,i-g)&&(n=!n);this.modules[b][i-g]=n;e--; -1==e&&(f++,e=7)}b+=d;if(0>b||this.moduleCount<=b){b-=d;d=-d;break}}}};o.PAD0=236;o.PAD1=17;o.createData=function(a,c,d){for(var c=p.getRSBlocks(a,
c),b=new t,e=0;e<d.length;e++){var f=d[e];b.put(f.mode,4);b.put(f.getLength(),j.getLengthInBits(f.mode,a));f.write(b)}for(e=a=0;e<c.length;e++)a+=c[e].dataCount;if(b.getLengthInBits()>8*a)throw Error("code length overflow. ("+b.getLengthInBits()+">"+8*a+")");for(b.getLengthInBits()+4<=8*a&&b.put(0,4);0!=b.getLengthInBits()%8;)b.putBit(!1);for(;!(b.getLengthInBits()>=8*a);){b.put(o.PAD0,8);if(b.getLengthInBits()>=8*a)break;b.put(o.PAD1,8)}return o.createBytes(b,c)};o.createBytes=function(a,c){for(var d=
0,b=0,e=0,f=Array(c.length),i=Array(c.length),g=0;g<c.length;g++){var n=c[g].dataCount,h=c[g].totalCount-n,b=Math.max(b,n),e=Math.max(e,h);f[g]=Array(n);for(var k=0;k<f[g].length;k++)f[g][k]=255&a.buffer[k+d];d+=n;k=j.getErrorCorrectPolynomial(h);n=(new q(f[g],k.getLength()-1)).mod(k);i[g]=Array(k.getLength()-1);for(k=0;k<i[g].length;k++)h=k+n.getLength()-i[g].length,i[g][k]=0<=h?n.get(h):0}for(k=g=0;k<c.length;k++)g+=c[k].totalCount;d=Array(g);for(k=n=0;k<b;k++)for(g=0;g<c.length;g++)k<f[g].length&&
(d[n++]=f[g][k]);for(k=0;k<e;k++)for(g=0;g<c.length;g++)k<i[g].length&&(d[n++]=i[g][k]);return d};s=4;for(var j={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(a){for(var c=a<<10;0<=j.getBCHDigit(c)-j.getBCHDigit(j.G15);)c^=j.G15<<j.getBCHDigit(c)-j.getBCHDigit(j.G15);return(a<<10|c)^j.G15_MASK},getBCHTypeNumber:function(a){for(var c=a<<12;0<=j.getBCHDigit(c)-
j.getBCHDigit(j.G18);)c^=j.G18<<j.getBCHDigit(c)-j.getBCHDigit(j.G18);return a<<12|c},getBCHDigit:function(a){for(var c=0;0!=a;)c++,a>>>=1;return c},getPatternPosition:function(a){return j.PATTERN_POSITION_TABLE[a-1]},getMask:function(a,c,d){switch(a){case 0:return 0==(c+d)%2;case 1:return 0==c%2;case 2:return 0==d%3;case 3:return 0==(c+d)%3;case 4:return 0==(Math.floor(c/2)+Math.floor(d/3))%2;case 5:return 0==c*d%2+c*d%3;case 6:return 0==(c*d%2+c*d%3)%2;case 7:return 0==(c*d%3+(c+d)%2)%2;default:throw Error("bad maskPattern:"+
a);}},getErrorCorrectPolynomial:function(a){for(var c=new q([1],0),d=0;d<a;d++)c=c.multiply(new q([1,l.gexp(d)],0));return c},getLengthInBits:function(a,c){if(1<=c&&10>c)switch(a){case 1:return 10;case 2:return 9;case s:return 8;case 8:return 8;default:throw Error("mode:"+a);}else if(27>c)switch(a){case 1:return 12;case 2:return 11;case s:return 16;case 8:return 10;default:throw Error("mode:"+a);}else if(41>c)switch(a){case 1:return 14;case 2:return 13;case s:return 16;case 8:return 12;default:throw Error("mode:"+
a);}else throw Error("type:"+c);},getLostPoint:function(a){for(var c=a.getModuleCount(),d=0,b=0;b<c;b++)for(var e=0;e<c;e++){for(var f=0,i=a.isDark(b,e),g=-1;1>=g;g++)if(!(0>b+g||c<=b+g))for(var h=-1;1>=h;h++)0>e+h||c<=e+h||0==g&&0==h||i==a.isDark(b+g,e+h)&&f++;5<f&&(d+=3+f-5)}for(b=0;b<c-1;b++)for(e=0;e<c-1;e++)if(f=0,a.isDark(b,e)&&f++,a.isDark(b+1,e)&&f++,a.isDark(b,e+1)&&f++,a.isDark(b+1,e+1)&&f++,0==f||4==f)d+=3;for(b=0;b<c;b++)for(e=0;e<c-6;e++)a.isDark(b,e)&&!a.isDark(b,e+1)&&a.isDark(b,e+
2)&&a.isDark(b,e+3)&&a.isDark(b,e+4)&&!a.isDark(b,e+5)&&a.isDark(b,e+6)&&(d+=40);for(e=0;e<c;e++)for(b=0;b<c-6;b++)a.isDark(b,e)&&!a.isDark(b+1,e)&&a.isDark(b+2,e)&&a.isDark(b+3,e)&&a.isDark(b+4,e)&&!a.isDark(b+5,e)&&a.isDark(b+6,e)&&(d+=40);for(e=f=0;e<c;e++)for(b=0;b<c;b++)a.isDark(b,e)&&f++;a=Math.abs(100*f/c/c-50)/5;return d+10*a}},l={glog:function(a){if(1>a)throw Error("glog("+a+")");return l.LOG_TABLE[a]},gexp:function(a){for(;0>a;)a+=255;for(;256<=a;)a-=255;return l.EXP_TABLE[a]},EXP_TABLE:Array(256),
LOG_TABLE:Array(256)},m=0;8>m;m++)l.EXP_TABLE[m]=1<<m;for(m=8;256>m;m++)l.EXP_TABLE[m]=l.EXP_TABLE[m-4]^l.EXP_TABLE[m-5]^l.EXP_TABLE[m-6]^l.EXP_TABLE[m-8];for(m=0;255>m;m++)l.LOG_TABLE[l.EXP_TABLE[m]]=m;q.prototype={get:function(a){return this.num[a]},getLength:function(){return this.num.length},multiply:function(a){for(var c=Array(this.getLength()+a.getLength()-1),d=0;d<this.getLength();d++)for(var b=0;b<a.getLength();b++)c[d+b]^=l.gexp(l.glog(this.get(d))+l.glog(a.get(b)));return new q(c,0)},mod:function(a){if(0>
this.getLength()-a.getLength())return this;for(var c=l.glog(this.get(0))-l.glog(a.get(0)),d=Array(this.getLength()),b=0;b<this.getLength();b++)d[b]=this.get(b);for(b=0;b<a.getLength();b++)d[b]^=l.gexp(l.glog(a.get(b))+c);return(new q(d,0)).mod(a)}};p.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]];p.getRSBlocks=function(a,c){var d=p.getRsBlockTable(a,c);if(void 0==d)throw Error("bad rs block @ typeNumber:"+a+"/errorCorrectLevel:"+c);for(var b=d.length/3,e=[],f=0;f<b;f++)for(var h=d[3*f+0],g=d[3*f+1],j=d[3*f+2],l=0;l<h;l++)e.push(new p(g,j));return e};p.getRsBlockTable=function(a,c){switch(c){case 1:return p.RS_BLOCK_TABLE[4*(a-1)+0];case 0:return p.RS_BLOCK_TABLE[4*(a-1)+1];case 3:return p.RS_BLOCK_TABLE[4*
(a-1)+2];case 2:return p.RS_BLOCK_TABLE[4*(a-1)+3]}};t.prototype={get:function(a){return 1==(this.buffer[Math.floor(a/8)]>>>7-a%8&1)},put:function(a,c){for(var d=0;d<c;d++)this.putBit(1==(a>>>c-d-1&1))},getLengthInBits:function(){return this.length},putBit:function(a){var c=Math.floor(this.length/8);this.buffer.length<=c&&this.buffer.push(0);a&&(this.buffer[c]|=128>>>this.length%8);this.length++}};"string"===typeof h&&(h={text:h});h=r.extend({},{render:"canvas",256,height:256,typeNumber:-1,
correctLevel:2,background:"#ffffff",foreground:"#000000"},h);return this.each(function(){var a;if("canvas"==h.render){a=new o(h.typeNumber,h.correctLevel);a.addData(h.text);a.make();var c=document.createElement("canvas");c.width=h.width;c.height=h.height;for(var d=c.getContext("2d"),b=h.width/a.getModuleCount(),e=h.height/a.getModuleCount(),f=0;f<a.getModuleCount();f++)for(var i=0;i<a.getModuleCount();i++){d.fillStyle=a.isDark(f,i)?h.foreground:h.background;var g=Math.ceil((i+1)*b)-Math.floor(i*b),
j=Math.ceil((f+1)*b)-Math.floor(f*b);d.fillRect(Math.round(i*b),Math.round(f*e),g,j)}}else{a=new o(h.typeNumber,h.correctLevel);a.addData(h.text);a.make();c=r("<table></table>").css("width",h.width+"px").css("height",h.height+"px").css("border","0px").css("border-collapse","collapse").css("background-color",h.background);d=h.width/a.getModuleCount();b=h.height/a.getModuleCount();for(e=0;e<a.getModuleCount();e++){f=r("<tr></tr>").css("height",b+"px").appendTo(c);for(i=0;i<a.getModuleCount();i++)r("<td></td>").css("width",
d+"px").css("background-color",a.isDark(e,i)?h.foreground:h.background).appendTo(f)}}a=c;jQuery(a).appendTo(this)})}})(jQuery);