pos_xcx/utils/qrcode.js

const QRErrorCorrectLevel = {
    L: 1,
    M: 0,
    Q: 3,
    H: 2
};

const defaultOptions = {
    width: null,
    height: null,
    text: "",
    typeNumber: -1,
    correctLevel: QRErrorCorrectLevel.H,
    background: "#ffffff",
    foreground: "#000000",
    image: null
};


function QR8bitByte(data) {
    this.mode = QRMode.MODE_8BIT_BYTE;
    this.data = data;
}

QR8bitByte.prototype = {

    getLength: function (buffer) {
        return this.data.length;
    },

    write: function (buffer) {
        for (var i = 0; i < this.data.length; i++) {
            // not JIS ...
            buffer.put(this.data.charCodeAt(i), 8);
        }
    }
};

//---------------------------------------------------------------------
// QRCode
//---------------------------------------------------------------------

function QRCode(typeNumber, errorCorrectLevel) {
    this.typeNumber = typeNumber;
    this.errorCorrectLevel = errorCorrectLevel;
    this.modules = null;
    this.moduleCount = 0;
    this.dataCache = null;
    this.dataList = new Array();
}

QRCode.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 () {
        // Calculate automatically typeNumber if provided is < 1
        if (this.typeNumber < 1) {
            var typeNumber = 1;
            for (typeNumber = 1; typeNumber < 40; typeNumber++) {
                var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, this.errorCorrectLevel);

                var buffer = new QRBitBuffer();
                var totalDataCount = 0;
                for (var i = 0; i < rsBlocks.length; i++) {
                    totalDataCount += rsBlocks[i].dataCount;
                }

                for (var i = 0; i < this.dataList.length; i++) {
                    var data = this.dataList[i];
                    buffer.put(data.mode, 4);
                    buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber));
                    data.write(buffer);
                }
                if (buffer.getLengthInBits() <= totalDataCount * 8)
                    break;
            }
            this.typeNumber = typeNumber;
        }
        this.makeImpl(false, this.getBestMaskPattern());
    },

    makeImpl: function (test, maskPattern) {

        this.moduleCount = this.typeNumber * 4 + 17;
        this.modules = new Array(this.moduleCount);

        for (var row = 0; row < this.moduleCount; row++) {

            this.modules[row] = new Array(this.moduleCount);

            for (var col = 0; col < this.moduleCount; col++) {
                this.modules[row][col] = null; //(col + row) % 3;
            }
        }

        this.setupPositionProbePattern(0, 0);
        this.setupPositionProbePattern(this.moduleCount - 7, 0);
        this.setupPositionProbePattern(0, this.moduleCount - 7);
        this.setupPositionAdjustPattern();
        this.setupTimingPattern();
        this.setupTypeInfo(test, maskPattern);

        if (this.typeNumber >= 7) {
            this.setupTypeNumber(test);
        }

        if (this.dataCache == null) {
            this.dataCache = QRCode.createData(this.typeNumber, this.errorCorrectLevel, this.dataList);
        }

        this.mapData(this.dataCache, maskPattern);
    },

    setupPositionProbePattern: function (row, col) {

        for (var r = -1; r <= 7; r++) {

            if (row + r <= -1 || this.moduleCount <= row + r) continue;

            for (var c = -1; c <= 7; c++) {

                if (col + c <= -1 || this.moduleCount <= col + c) continue;

                if ((0 <= r && r <= 6 && (c == 0 || c == 6)) ||
                    (0 <= c && c <= 6 && (r == 0 || r == 6)) ||
                    (2 <= r && r <= 4 && 2 <= c && c <= 4)) {
                    this.modules[row + r][col + c] = true;
                } else {
                    this.modules[row + r][col + c] = false;
                }
            }
        }
    },

    getBestMaskPattern: function () {

        var minLostPoint = 0;
        var pattern = 0;

        for (var i = 0; i < 8; i++) {

            this.makeImpl(true, i);

            var lostPoint = QRUtil.getLostPoint(this);

            if (i == 0 || minLostPoint > lostPoint) {
                minLostPoint = lostPoint;
                pattern = i;
            }
        }

        return pattern;
    },

    createMovieClip: function (target_mc, instance_name, depth) {

        var qr_mc = target_mc.createEmptyMovieClip(instance_name, depth);
        var cs = 1;

        this.make();

        for (var row = 0; row < this.modules.length; row++) {

            var y = row * cs;

            for (var col = 0; col < this.modules[row].length; col++) {

                var x = col * cs;
                var dark = this.modules[row][col];

                if (dark) {
                    qr_mc.beginFill(0, 100);
                    qr_mc.moveTo(x, y);
                    qr_mc.lineTo(x + cs, y);
                    qr_mc.lineTo(x + cs, y + cs);
                    qr_mc.lineTo(x, y + cs);
                    qr_mc.endFill();
                }
            }
        }

        return qr_mc;
    },

    setupTimingPattern: function () {

        for (var r = 8; r < this.moduleCount - 8; r++) {
            if (this.modules[r][6] != null) {
                continue;
            }
            this.modules[r][6] = (r % 2 == 0);
        }

        for (var c = 8; c < this.moduleCount - 8; c++) {
            if (this.modules[6][c] != null) {
                continue;
            }
            this.modules[6][c] = (c % 2 == 0);
        }
    },

    setupPositionAdjustPattern: function () {

        var pos = QRUtil.getPatternPosition(this.typeNumber);

        for (var i = 0; i < pos.length; i++) {

            for (var j = 0; j < pos.length; j++) {

                var row = pos[i];
                var col = pos[j];

                if (this.modules[row][col] != null) {
                    continue;
                }

                for (var r = -2; r <= 2; r++) {

                    for (var c = -2; c <= 2; c++) {

                        if (r == -2 || r == 2 || c == -2 || c == 2 ||
                            (r == 0 && c == 0)) {
                            this.modules[row + r][col + c] = true;
                        } else {
                            this.modules[row + r][col + c] = false;
                        }
                    }
                }
            }
        }
    },

    setupTypeNumber: function (test) {

        var bits = QRUtil.getBCHTypeNumber(this.typeNumber);

        for (var i = 0; i < 18; i++) {
            var mod = (!test && ((bits >> i) & 1) == 1);
            this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod;
        }

        for (var i = 0; i < 18; i++) {
            var mod = (!test && ((bits >> i) & 1) == 1);
            this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
        }
    },

    setupTypeInfo: function (test, maskPattern) {

        var data = (this.errorCorrectLevel << 3) | maskPattern;
        var bits = QRUtil.getBCHTypeInfo(data);

        // vertical		
        for (var i = 0; i < 15; i++) {

            var mod = (!test && ((bits >> i) & 1) == 1);

            if (i < 6) {
                this.modules[i][8] = mod;
            } else if (i < 8) {
                this.modules[i + 1][8] = mod;
            } else {
                this.modules[this.moduleCount - 15 + i][8] = mod;
            }
        }

        // horizontal
        for (var i = 0; i < 15; i++) {

            var mod = (!test && ((bits >> i) & 1) == 1);

            if (i < 8) {
                this.modules[8][this.moduleCount - i - 1] = mod;
            } else if (i < 9) {
                this.modules[8][15 - i - 1 + 1] = mod;
            } else {
                this.modules[8][15 - i - 1] = mod;
            }
        }

        // fixed module
        this.modules[this.moduleCount - 8][8] = (!test);

    },

    mapData: function (data, maskPattern) {

        var inc = -1;
        var row = this.moduleCount - 1;
        var bitIndex = 7;
        var byteIndex = 0;

        for (var col = this.moduleCount - 1; col > 0; col -= 2) {

            if (col == 6) col--;

            while (true) {

                for (var c = 0; c < 2; c++) {

                    if (this.modules[row][col - c] == null) {

                        var dark = false;

                        if (byteIndex < data.length) {
                            dark = (((data[byteIndex] >>> bitIndex) & 1) == 1);
                        }

                        var mask = QRUtil.getMask(maskPattern, row, col - c);

                        if (mask) {
                            dark = !dark;
                        }

                        this.modules[row][col - c] = dark;
                        bitIndex--;

                        if (bitIndex == -1) {
                            byteIndex++;
                            bitIndex = 7;
                        }
                    }
                }

                row += inc;

                if (row < 0 || this.moduleCount <= row) {
                    row -= inc;
                    inc = -inc;
                    break;
                }
            }
        }

    }

};

QRCode.PAD0 = 0xEC;
QRCode.PAD1 = 0x11;

QRCode.createData = function (typeNumber, errorCorrectLevel, dataList) {

    var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel);

    var buffer = new QRBitBuffer();

    for (var i = 0; i < dataList.length; i++) {
        var data = dataList[i];
        buffer.put(data.mode, 4);
        buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber));
        data.write(buffer);
    }

    // calc num max data.
    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 +
            ")");
    }

    // end code
    if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) {
        buffer.put(0, 4);
    }

    // padding
    while (buffer.getLengthInBits() % 8 != 0) {
        buffer.putBit(false);
    }

    // padding
    while (true) {

        if (buffer.getLengthInBits() >= totalDataCount * 8) {
            break;
        }
        buffer.put(QRCode.PAD0, 8);

        if (buffer.getLengthInBits() >= totalDataCount * 8) {
            break;
        }
        buffer.put(QRCode.PAD1, 8);
    }

    return QRCode.createBytes(buffer, rsBlocks);
}

QRCode.createBytes = function (buffer, rsBlocks) {

    var offset = 0;

    var maxDcCount = 0;
    var maxEcCount = 0;

    var dcdata = new Array(rsBlocks.length);
    var ecdata = new Array(rsBlocks.length);

    for (var r = 0; r < rsBlocks.length; r++) {

        var dcCount = rsBlocks[r].dataCount;
        var ecCount = rsBlocks[r].totalCount - dcCount;

        maxDcCount = Math.max(maxDcCount, dcCount);
        maxEcCount = Math.max(maxEcCount, ecCount);

        dcdata[r] = new Array(dcCount);

        for (var i = 0; i < dcdata[r].length; i++) {
            dcdata[r][i] = 0xff & buffer.buffer[i + offset];
        }
        offset += dcCount;

        var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
        var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1);

        var modPoly = rawPoly.mod(rsPoly);
        ecdata[r] = new Array(rsPoly.getLength() - 1);
        for (var i = 0; i < ecdata[r].length; i++) {
            var modIndex = i + modPoly.getLength() - ecdata[r].length;
            ecdata[r][i] = (modIndex >= 0) ? modPoly.get(modIndex) : 0;
        }

    }

    var totalCodeCount = 0;
    for (var i = 0; i < rsBlocks.length; i++) {
        totalCodeCount += rsBlocks[i].totalCount;
    }

    var data = new Array(totalCodeCount);
    var index = 0;

    for (var i = 0; i < maxDcCount; i++) {
        for (var r = 0; r < rsBlocks.length; r++) {
            if (i < dcdata[r].length) {
                data[index++] = dcdata[r][i];
            }
        }
    }

    for (var i = 0; i < maxEcCount; i++) {
        for (var r = 0; r < rsBlocks.length; r++) {
            if (i < ecdata[r].length) {
                data[index++] = ecdata[r][i];
            }
        }
    }

    return data;

}

//---------------------------------------------------------------------
// QRMode
//---------------------------------------------------------------------

var QRMode = {
    MODE_NUMBER: 1 << 0,
    MODE_ALPHA_NUM: 1 << 1,
    MODE_8BIT_BYTE: 1 << 2,
    MODE_KANJI: 1 << 3
};




//---------------------------------------------------------------------
// QRMaskPattern
//---------------------------------------------------------------------

var QRMaskPattern = {
    PATTERN000: 0,
    PATTERN001: 1,
    PATTERN010: 2,
    PATTERN011: 3,
    PATTERN100: 4,
    PATTERN101: 5,
    PATTERN110: 6,
    PATTERN111: 7
};

//---------------------------------------------------------------------
// QRUtil
//---------------------------------------------------------------------

var QRUtil = {

    PATTERN_POSITION_TABLE: [
        [],
        [6, 18],
        [6, 22],
        [6, 26],
        [6, 30],
        [6, 34],
        [6, 22, 38],
        [6, 24, 42],
        [6, 26, 46],
        [6, 28, 50],
        [6, 30, 54],
        [6, 32, 58],
        [6, 34, 62],
        [6, 26, 46, 66],
        [6, 26, 48, 70],
        [6, 26, 50, 74],
        [6, 30, 54, 78],
        [6, 30, 56, 82],
        [6, 30, 58, 86],
        [6, 34, 62, 90],
        [6, 28, 50, 72, 94],
        [6, 26, 50, 74, 98],
        [6, 30, 54, 78, 102],
        [6, 28, 54, 80, 106],
        [6, 32, 58, 84, 110],
        [6, 30, 58, 86, 114],
        [6, 34, 62, 90, 118],
        [6, 26, 50, 74, 98, 122],
        [6, 30, 54, 78, 102, 126],
        [6, 26, 52, 78, 104, 130],
        [6, 30, 56, 82, 108, 134],
        [6, 34, 60, 86, 112, 138],
        [6, 30, 58, 86, 114, 142],
        [6, 34, 62, 90, 118, 146],
        [6, 30, 54, 78, 102, 126, 150],
        [6, 24, 50, 76, 102, 128, 154],
        [6, 28, 54, 80, 106, 132, 158],
        [6, 32, 58, 84, 110, 136, 162],
        [6, 26, 54, 82, 110, 138, 166],
        [6, 30, 58, 86, 114, 142, 170]
    ],

    G15: (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0),
    G18: (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0),
    G15_MASK: (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1),

    getBCHTypeInfo: function (data) {
        var d = data << 10;
        while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) {
            d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15)));
        }
        return ((data << 10) | d) ^ QRUtil.G15_MASK;
    },

    getBCHTypeNumber: function (data) {
        var d = data << 12;
        while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) {
            d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18)));
        }
        return (data << 12) | d;
    },

    getBCHDigit: function (data) {

        var digit = 0;

        while (data != 0) {
            digit++;
            data >>>= 1;
        }

        return digit;
    },

    getPatternPosition: function (typeNumber) {
        return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1];
    },

    getMask: function (maskPattern, i, j) {

        switch (maskPattern) {

            case QRMaskPattern.PATTERN000:
                return (i + j) % 2 == 0;
            case QRMaskPattern.PATTERN001:
                return i % 2 == 0;
            case QRMaskPattern.PATTERN010:
                return j % 3 == 0;
            case QRMaskPattern.PATTERN011:
                return (i + j) % 3 == 0;
            case QRMaskPattern.PATTERN100:
                return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0;
            case QRMaskPattern.PATTERN101:
                return (i * j) % 2 + (i * j) % 3 == 0;
            case QRMaskPattern.PATTERN110:
                return ((i * j) % 2 + (i * j) % 3) % 2 == 0;
            case QRMaskPattern.PATTERN111:
                return ((i * j) % 3 + (i + j) % 2) % 2 == 0;

            default:
                throw new Error("bad maskPattern:" + maskPattern);
        }
    },

    getErrorCorrectPolynomial: function (errorCorrectLength) {

        var a = new QRPolynomial([1], 0);

        for (var i = 0; i < errorCorrectLength; i++) {
            a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0));
        }

        return a;
    },

    getLengthInBits: function (mode, type) {

        if (1 <= type && type < 10) {

            // 1 - 9

            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) {

            // 10 - 26

            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) {

            // 27 - 40

            switch (mode) {
                case QRMode.MODE_NUMBER:
                    return 14;
                case QRMode.MODE_ALPHA_NUM:
                    return 13;
                case QRMode.MODE_8BIT_BYTE:
                    return 16;
                case QRMode.MODE_KANJI:
                    return 12;
                default:
                    throw new Error("mode:" + mode);
            }

        } else {
            throw new Error("type:" + type);
        }
    },

    getLostPoint: function (qrCode) {

        var moduleCount = qrCode.getModuleCount();

        var lostPoint = 0;

        // LEVEL1

        for (var row = 0; row < moduleCount; row++) {

            for (var col = 0; col < moduleCount; col++) {

                var sameCount = 0;
                var dark = qrCode.isDark(row, col);

                for (var r = -1; r <= 1; r++) {

                    if (row + r < 0 || moduleCount <= row + r) {
                        continue;
                    }

                    for (var c = -1; c <= 1; c++) {

                        if (col + c < 0 || moduleCount <= col + c) {
                            continue;
                        }

                        if (r == 0 && c == 0) {
                            continue;
                        }

                        if (dark == qrCode.isDark(row + r, col + c)) {
                            sameCount++;
                        }
                    }
                }

                if (sameCount > 5) {
                    lostPoint += (3 + sameCount - 5);
                }
            }
        }

        // LEVEL2

        for (var row = 0; row < moduleCount - 1; row++) {
            for (var col = 0; col < moduleCount - 1; col++) {
                var count = 0;
                if (qrCode.isDark(row, col)) count++;
                if (qrCode.isDark(row + 1, col)) count++;
                if (qrCode.isDark(row, col + 1)) count++;
                if (qrCode.isDark(row + 1, col + 1)) count++;
                if (count == 0 || count == 4) {
                    lostPoint += 3;
                }
            }
        }

        // LEVEL3

        for (var row = 0; row < moduleCount; row++) {
            for (var col = 0; col < moduleCount - 6; col++) {
                if (qrCode.isDark(row, col) &&
                    !qrCode.isDark(row, col + 1) &&
                    qrCode.isDark(row, col + 2) &&
                    qrCode.isDark(row, col + 3) &&
                    qrCode.isDark(row, col + 4) &&
                    !qrCode.isDark(row, col + 5) &&
                    qrCode.isDark(row, col + 6)) {
                    lostPoint += 40;
                }
            }
        }

        for (var col = 0; col < moduleCount; col++) {
            for (var row = 0; row < moduleCount - 6; row++) {
                if (qrCode.isDark(row, col) &&
                    !qrCode.isDark(row + 1, col) &&
                    qrCode.isDark(row + 2, col) &&
                    qrCode.isDark(row + 3, col) &&
                    qrCode.isDark(row + 4, col) &&
                    !qrCode.isDark(row + 5, col) &&
                    qrCode.isDark(row + 6, col)) {
                    lostPoint += 40;
                }
            }
        }

        // LEVEL4

        var darkCount = 0;

        for (var col = 0; col < moduleCount; col++) {
            for (var row = 0; row < moduleCount; row++) {
                if (qrCode.isDark(row, col)) {
                    darkCount++;
                }
            }
        }

        var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
        lostPoint += ratio * 10;

        return lostPoint;
    }

};


//---------------------------------------------------------------------
// QRMath
//---------------------------------------------------------------------

var QRMath = {

    glog: function (n) {

        if (n < 1) {
            throw new Error("glog(" + n + ")");
        }

        return QRMath.LOG_TABLE[n];
    },

    gexp: function (n) {

        while (n < 0) {
            n += 255;
        }

        while (n >= 256) {
            n -= 255;
        }

        return QRMath.EXP_TABLE[n];
    },

    EXP_TABLE: new Array(256),

    LOG_TABLE: new Array(256)

};

for (var i = 0; i < 8; i++) {
    QRMath.EXP_TABLE[i] = 1 << i;
}
for (var i = 8; i < 256; i++) {
    QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] ^
        QRMath.EXP_TABLE[i - 5] ^
        QRMath.EXP_TABLE[i - 6] ^
        QRMath.EXP_TABLE[i - 8];
}
for (var i = 0; i < 255; i++) {
    QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i;
}

//---------------------------------------------------------------------
// QRPolynomial
//---------------------------------------------------------------------

function QRPolynomial(num, shift) {

    if (num.length == undefined) {
        throw new Error(num.length + "/" + shift);
    }

    var offset = 0;

    while (offset < num.length && num[offset] == 0) {
        offset++;
    }

    this.num = new Array(num.length - offset + shift);
    for (var i = 0; i < num.length - offset; i++) {
        this.num[i] = num[i + offset];
    }
}

QRPolynomial.prototype = {

    get: function (index) {
        return this.num[index];
    },

    getLength: function () {
        return this.num.length;
    },

    multiply: function (e) {

        var num = new Array(this.getLength() + e.getLength() - 1);

        for (var i = 0; i < this.getLength(); i++) {
            for (var j = 0; j < e.getLength(); j++) {
                num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i)) + QRMath.glog(e.get(j)));
            }
        }

        return new QRPolynomial(num, 0);
    },

    mod: function (e) {

        if (this.getLength() - e.getLength() < 0) {
            return this;
        }

        var ratio = QRMath.glog(this.get(0)) - QRMath.glog(e.get(0));

        var num = new Array(this.getLength());

        for (var i = 0; i < this.getLength(); i++) {
            num[i] = this.get(i);
        }

        for (var i = 0; i < e.getLength(); i++) {
            num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio);
        }

        // recursive call
        return new QRPolynomial(num, 0).mod(e);
    }
};

//---------------------------------------------------------------------
// QRRSBlock
//---------------------------------------------------------------------

function QRRSBlock(totalCount, dataCount) {
    this.totalCount = totalCount;
    this.dataCount = dataCount;
}

QRRSBlock.RS_BLOCK_TABLE = [

    // L
    // M
    // Q
    // H

    // 1
    [1, 26, 19],
    [1, 26, 16],
    [1, 26, 13],
    [1, 26, 9],

    // 2
    [1, 44, 34],
    [1, 44, 28],
    [1, 44, 22],
    [1, 44, 16],

    // 3
    [1, 70, 55],
    [1, 70, 44],
    [2, 35, 17],
    [2, 35, 13],

    // 4		
    [1, 100, 80],
    [2, 50, 32],
    [2, 50, 24],
    [4, 25, 9],

    // 5
    [1, 134, 108],
    [2, 67, 43],
    [2, 33, 15, 2, 34, 16],
    [2, 33, 11, 2, 34, 12],

    // 6
    [2, 86, 68],
    [4, 43, 27],
    [4, 43, 19],
    [4, 43, 15],

    // 7		
    [2, 98, 78],
    [4, 49, 31],
    [2, 32, 14, 4, 33, 15],
    [4, 39, 13, 1, 40, 14],

    // 8
    [2, 121, 97],
    [2, 60, 38, 2, 61, 39],
    [4, 40, 18, 2, 41, 19],
    [4, 40, 14, 2, 41, 15],

    // 9
    [2, 146, 116],
    [3, 58, 36, 2, 59, 37],
    [4, 36, 16, 4, 37, 17],
    [4, 36, 12, 4, 37, 13],

    // 10		
    [2, 86, 68, 2, 87, 69],
    [4, 69, 43, 1, 70, 44],
    [6, 43, 19, 2, 44, 20],
    [6, 43, 15, 2, 44, 16],

    // 11
    [4, 101, 81],
    [1, 80, 50, 4, 81, 51],
    [4, 50, 22, 4, 51, 23],
    [3, 36, 12, 8, 37, 13],

    // 12
    [2, 116, 92, 2, 117, 93],
    [6, 58, 36, 2, 59, 37],
    [4, 46, 20, 6, 47, 21],
    [7, 42, 14, 4, 43, 15],

    // 13
    [4, 133, 107],
    [8, 59, 37, 1, 60, 38],
    [8, 44, 20, 4, 45, 21],
    [12, 33, 11, 4, 34, 12],

    // 14
    [3, 145, 115, 1, 146, 116],
    [4, 64, 40, 5, 65, 41],
    [11, 36, 16, 5, 37, 17],
    [11, 36, 12, 5, 37, 13],

    // 15
    [5, 109, 87, 1, 110, 88],
    [5, 65, 41, 5, 66, 42],
    [5, 54, 24, 7, 55, 25],
    [11, 36, 12],

    // 16
    [5, 122, 98, 1, 123, 99],
    [7, 73, 45, 3, 74, 46],
    [15, 43, 19, 2, 44, 20],
    [3, 45, 15, 13, 46, 16],

    // 17
    [1, 135, 107, 5, 136, 108],
    [10, 74, 46, 1, 75, 47],
    [1, 50, 22, 15, 51, 23],
    [2, 42, 14, 17, 43, 15],

    // 18
    [5, 150, 120, 1, 151, 121],
    [9, 69, 43, 4, 70, 44],
    [17, 50, 22, 1, 51, 23],
    [2, 42, 14, 19, 43, 15],

    // 19
    [3, 141, 113, 4, 142, 114],
    [3, 70, 44, 11, 71, 45],
    [17, 47, 21, 4, 48, 22],
    [9, 39, 13, 16, 40, 14],

    // 20
    [3, 135, 107, 5, 136, 108],
    [3, 67, 41, 13, 68, 42],
    [15, 54, 24, 5, 55, 25],
    [15, 43, 15, 10, 44, 16],

    // 21
    [4, 144, 116, 4, 145, 117],
    [17, 68, 42],
    [17, 50, 22, 6, 51, 23],
    [19, 46, 16, 6, 47, 17],

    // 22
    [2, 139, 111, 7, 140, 112],
    [17, 74, 46],
    [7, 54, 24, 16, 55, 25],
    [34, 37, 13],

    // 23
    [4, 151, 121, 5, 152, 122],
    [4, 75, 47, 14, 76, 48],
    [11, 54, 24, 14, 55, 25],
    [16, 45, 15, 14, 46, 16],

    // 24
    [6, 147, 117, 4, 148, 118],
    [6, 73, 45, 14, 74, 46],
    [11, 54, 24, 16, 55, 25],
    [30, 46, 16, 2, 47, 17],

    // 25
    [8, 132, 106, 4, 133, 107],
    [8, 75, 47, 13, 76, 48],
    [7, 54, 24, 22, 55, 25],
    [22, 45, 15, 13, 46, 16],

    // 26
    [10, 142, 114, 2, 143, 115],
    [19, 74, 46, 4, 75, 47],
    [28, 50, 22, 6, 51, 23],
    [33, 46, 16, 4, 47, 17],

    // 27
    [8, 152, 122, 4, 153, 123],
    [22, 73, 45, 3, 74, 46],
    [8, 53, 23, 26, 54, 24],
    [12, 45, 15, 28, 46, 16],

    // 28
    [3, 147, 117, 10, 148, 118],
    [3, 73, 45, 23, 74, 46],
    [4, 54, 24, 31, 55, 25],
    [11, 45, 15, 31, 46, 16],

    // 29
    [7, 146, 116, 7, 147, 117],
    [21, 73, 45, 7, 74, 46],
    [1, 53, 23, 37, 54, 24],
    [19, 45, 15, 26, 46, 16],

    // 30
    [5, 145, 115, 10, 146, 116],
    [19, 75, 47, 10, 76, 48],
    [15, 54, 24, 25, 55, 25],
    [23, 45, 15, 25, 46, 16],

    // 31
    [13, 145, 115, 3, 146, 116],
    [2, 74, 46, 29, 75, 47],
    [42, 54, 24, 1, 55, 25],
    [23, 45, 15, 28, 46, 16],

    // 32
    [17, 145, 115],
    [10, 74, 46, 23, 75, 47],
    [10, 54, 24, 35, 55, 25],
    [19, 45, 15, 35, 46, 16],

    // 33
    [17, 145, 115, 1, 146, 116],
    [14, 74, 46, 21, 75, 47],
    [29, 54, 24, 19, 55, 25],
    [11, 45, 15, 46, 46, 16],

    // 34
    [13, 145, 115, 6, 146, 116],
    [14, 74, 46, 23, 75, 47],
    [44, 54, 24, 7, 55, 25],
    [59, 46, 16, 1, 47, 17],

    // 35
    [12, 151, 121, 7, 152, 122],
    [12, 75, 47, 26, 76, 48],
    [39, 54, 24, 14, 55, 25],
    [22, 45, 15, 41, 46, 16],

    // 36
    [6, 151, 121, 14, 152, 122],
    [6, 75, 47, 34, 76, 48],
    [46, 54, 24, 10, 55, 25],
    [2, 45, 15, 64, 46, 16],

    // 37
    [17, 152, 122, 4, 153, 123],
    [29, 74, 46, 14, 75, 47],
    [49, 54, 24, 10, 55, 25],
    [24, 45, 15, 46, 46, 16],

    // 38
    [4, 152, 122, 18, 153, 123],
    [13, 74, 46, 32, 75, 47],
    [48, 54, 24, 14, 55, 25],
    [42, 45, 15, 32, 46, 16],

    // 39
    [20, 147, 117, 4, 148, 118],
    [40, 75, 47, 7, 76, 48],
    [43, 54, 24, 22, 55, 25],
    [10, 45, 15, 67, 46, 16],

    // 40
    [19, 148, 118, 6, 149, 119],
    [18, 75, 47, 31, 76, 48],
    [34, 54, 24, 34, 55, 25],
    [20, 45, 15, 61, 46, 16]
];

QRRSBlock.getRSBlocks = function (typeNumber, errorCorrectLevel) {

    var rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel);

    if (rsBlock == undefined) {
        throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel);
    }

    var length = rsBlock.length / 3;

    var list = new Array();

    for (var i = 0; i < length; i++) {

        var count = rsBlock[i * 3 + 0];
        var totalCount = rsBlock[i * 3 + 1];
        var dataCount = rsBlock[i * 3 + 2];

        for (var j = 0; j < count; j++) {
            list.push(new QRRSBlock(totalCount, dataCount));
        }
    }

    return list;
}

QRRSBlock.getRsBlockTable = function (typeNumber, errorCorrectLevel) {

    switch (errorCorrectLevel) {
        case QRErrorCorrectLevel.L:
            return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0];
        case QRErrorCorrectLevel.M:
            return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1];
        case QRErrorCorrectLevel.Q:
            return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2];
        case QRErrorCorrectLevel.H:
            return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3];
        default:
            return undefined;
    }
}

//---------------------------------------------------------------------
// QRBitBuffer
//---------------------------------------------------------------------

function QRBitBuffer() {
    this.buffer = new Array();
    this.length = 0;
}

QRBitBuffer.prototype = {

    get: function (index) {
        var bufIndex = Math.floor(index / 8);
        return ((this.buffer[bufIndex] >>> (7 - index % 8)) & 1) == 1;
    },

    put: function (num, length) {
        for (var i = 0; i < length; i++) {
            this.putBit(((num >>> (length - i - 1)) & 1) == 1);
        }
    },

    getLengthInBits: function () {
        return this.length;
    },

    putBit: function (bit) {

        var bufIndex = Math.floor(this.length / 8);
        if (this.buffer.length <= bufIndex) {
            this.buffer.push(0);
        }

        if (bit) {
            this.buffer[bufIndex] |= (0x80 >>> (this.length % 8));
        }

        this.length++;
    }
};

/**
 * 合并配置选项
 * 
 * @param object options 
 */
function assignOptions(options) {
    return Object.assign(defaultOptions, options);
}

/**
 * 绘制二维码
 * 
 * 
 * @param object ctx canvas RenderingContext 对象 
 * @param object options 
 */
function draw(ctx, options) {
    options = assignOptions(options);
    let qrcode = new QRCode(options.typeNumber, options.correctLevel);
    qrcode.addData(options.text);
    qrcode.make();
    let tileW = options.width / qrcode.getModuleCount(),
        tileH = options.height / qrcode.getModuleCount();
    for (var row = 0; row < qrcode.getModuleCount(); row++) {
        for (var col = 0; col < qrcode.getModuleCount(); col++) {
            ctx.fillStyle = qrcode.isDark(row, col) ? options.foreground : options.background;
            var w = (Math.ceil((col + 1) * tileW) - Math.floor(col * tileW));
            var h = (Math.ceil((row + 1) * tileH) - Math.floor(row * tileH));
            ctx.fillRect(Math.round(col * tileW), Math.round(row * tileH), w, h);
        }
    }
}

/**
 * 绘制图片
 * 
 * @param object ctx 
 * @param object image  -image对象
 * @param number sx  -画布x位置
 * @param number sy  -画布y位图
 * @param number imageWidth  -图片宽度
 * @param number imageHeight -图片高度
 */
function drawImage(ctx, image, sx, sy, imageWidth, imageHeight) {
    ctx.drawImage(image, sx, sy, imageWidth, imageHeight)
}


/**
 * 根据canvas_id绘制二维码
 * 
 * @param string id  -"qrCode" 
 * @param object options 选项 
 */
function drawById(id, options) {
    options = assignOptions(options);
    const query = this.createSelectorQuery()
    query.select(`#${id}`)
        .fields({
            node: true,
            size: true
        })
        .exec((res) => {
            const canvas = res[0].node
            const ctx = canvas.getContext('2d')
            let dpr = wx.getSystemInfoSync().pixelRatio;
            canvas.width = res[0].width * dpr;
            canvas.height = res[0].width * dpr;
            if (!options.width || !options.height) {
                options.width = res[0].width;
                options.height = res[0].height;
            }
            if (options.image) {
                const img = canvas.createImage()
                img.onload = () => {
                    draw(ctx, {
                        text: options.text,
                        width: options.width * dpr,
                        height: options.height * dpr
                    });
                    if (!options.image.x || !options.image.y) {
                        options.image.x = parseInt((options.width - options.image.width) / 2)
                        options.image.y = parseInt((options.width - options.image.width) / 2)
                    }
                    drawImage(
                        ctx, img,
                        options.image.x,
                        options.image.y,
                        options.image.width,
                        options.image.height);
                }
                img.src = options.image.url;
                return;
            }

            draw(ctx, {
                text: options.text,
                width: options.width * dpr,
                height: options.height * dpr
            });
        });
}

module.exports = {
    draw: draw,
    drawById: drawById
}