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JavaScript生成二維碼,H5+提供二維碼掃碼功能

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摘要：生成二維碼的代碼

生成二維碼的JavaScript代碼--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 http://www.d-project.com/
 * @see http://jeromeetienne.github.com/jquery-qrcode/
 */
var QRCode;

(function() {
    //---------------------------------------------------------------------
    // QRCode for JavaScript
    //
    // Copyright (c) 2009 Kazuhiko Arase
    //
    // URL: http://www.d-project.com/
    //
    // Licensed under the MIT license:
    //   http://www.opensource.org/licenses/mit-license.php
    //
    // The word "QR Code" is registered trademark of 
    // DENSO WAVE INCORPORATED
    //   http://www.denso-wave.com/qrcode/faqpatent-e.html
    //
    //---------------------------------------------------------------------
    function QR8bitByte(data) {
        this.mode = QRMode.MODE_8BIT_BYTE;
        this.data = data;
        this.parsedData = [];

        // Added to support UTF-8 Characters
        for(var i = 0, l = this.data.length; i < l; i++) {
            var byteArray = [];
            var code = this.data.charCodeAt(i);

            if(code > 0x10000) {
                byteArray[0] = 0xF0 | ((code & 0x1C0000) >>> 18);
                byteArray[1] = 0x80 | ((code & 0x3F000) >>> 12);
                byteArray[2] = 0x80 | ((code & 0xFC0) >>> 6);
                byteArray[3] = 0x80 | (code & 0x3F);
            } else if(code > 0x800) {
                byteArray[0] = 0xE0 | ((code & 0xF000) >>> 12);
                byteArray[1] = 0x80 | ((code & 0xFC0) >>> 6);
                byteArray[2] = 0x80 | (code & 0x3F);
            } else if(code > 0x80) {
                byteArray[0] = 0xC0 | ((code & 0x7C0) >>> 6);
                byteArray[1] = 0x80 | (code & 0x3F);
            } else {
                byteArray[0] = code;
            }

            this.parsedData.push(byteArray);
        }

        this.parsedData = Array.prototype.concat.apply([], this.parsedData);

        if(this.parsedData.length != this.data.length) {
            this.parsedData.unshift(191);
            this.parsedData.unshift(187);
            this.parsedData.unshift(239);
        }
    }

    QR8bitByte.prototype = {
        getLength: function(buffer) {
            return this.parsedData.length;
        },
        write: function(buffer) {
            for(var i = 0, l = this.parsedData.length; i < l; i++) {
                buffer.put(this.parsedData[i], 8);
            }
        }
    };

    function QRCodeModel(typeNumber, errorCorrectLevel) {
        this.typeNumber = typeNumber;
        this.errorCorrectLevel = errorCorrectLevel;
        this.modules = null;
        this.moduleCount = 0;
        this.dataCache = null;
        this.dataList = [];
    }

    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;
                    0 <= r && r <= 6 && (c == 0 || c == 6) || 0 <= c && c <= 6 && (r == 0 || r == 6) || 2 <= r && r <= 4 && 2 <= c && c <= 4 ? this.modules[row + r][col + c] = !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 = [""];

            for(var row = 0; row < nCount; row++) {
                aHTML.push("");

                for(var col = 0; col < nCount; col++) {
                    aHTML.push("");
                }

                aHTML.push("");
            }

            aHTML.push("
");
            _el.innerHTML = aHTML.join("");

            // Fix the margin values as real size.
            var elTable = _el.childNodes[0];
            var nLeftMarginTable = (_htOption.width - elTable.offsetWidth) / 2;
            var nTopMarginTable = (_htOption.height - elTable.offsetHeight) / 2;
            if(nLeftMarginTable > 0 && nTopMarginTable > 0) {
                elTable.style.margin = nTopMarginTable + "px " + nLeftMarginTable + "px";
            }
        };

        /**
         * Clear the QRCode
         */
        Drawing.prototype.clear = function() {
            this._el.innerHTML = "";
        };

        return Drawing;
    })() : (function() { // Drawing in Canvas
        function _onMakeImage() {
            this._elImage.src = this._elCanvas.toDataURL("image/png");
            this._elImage.style.display = "block";
            this._elCanvas.style.display = "none";
        }

        // 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);

                    // ?? ???? ?? ??
                    _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;
})();

簡單界面--qRcode.html

另附dcloudH5+在手機(jī)端掃碼調(diào)用小DEMO(在Hbuilder上創(chuàng)建移動(dòng)APP才能運(yùn)行)
調(diào)用界面barcode.html




    
        
        
        
        
        Hello H5+
        
        
        
        
    

    
        

            
掃一掃

掃碼界面barcode_scan.html




    
        
        
        
        
        掃碼界面
        
        
        
        
    

    
        

            

            
...載入中...

        

        

            
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