index.js

/**
 * EasyQRCodeJS-NodeJS
 *
 * NodeJS QRCode generator. Can save image or svg to file, get standard base64 image data url text or get SVG serialized text. Cross-browser QRCode generator for pure javascript. Support Dot style, Logo, Background image, Colorful, Title etc. settings. support binary mode.(Running without DOM on server side)
 *
 * Version 4.2.3
 *
 * @author [ inthinkcolor@gmail.com ]
 *
 * @see https://github.com/ushelp/EasyQRCodeJS-NodeJS
 * @see http://www.easyproject.cn/easyqrcodejs/tryit.html
 * @see https://github.com/ushelp/EasyQRCodeJS
 *
 * Copyright 2017 Ray, EasyProject
 * Released under the MIT license
 *
 * [Node.js]
 *
 */
var {
    createCanvas,
    loadImage,
    Image
} = global.canvas ? global.canvas : require('canvas');

var jsdom = require('jsdom');
var C2S = require('./canvas2svg');
var fs = require('fs');

const {
    JSDOM
} = jsdom;
const win = new JSDOM().window;

function QR8bitByte(data, binary) {
    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 (binary) {
            byteArray[0] = code;
        } else {
            if (code > 0x10000) {
                byteArray[0] = 0xF0 | ((code & 0x1C0000) >>> 18);
                byteArray[1] = 0x80 | ((code & 0x3F000) >>> 12);
                byteArray[2] = 0x80 | ((code & 0xFC0) >>> 6);
                byteArray[3] = 0x80 | (code & 0x3F);
            } else if (code > 0x800) {
                byteArray[0] = 0xE0 | ((code & 0xF000) >>> 12);
                byteArray[1] = 0x80 | ((code & 0xFC0) >>> 6);
                byteArray[2] = 0x80 | (code & 0x3F);
            } else if (code > 0x80) {
                byteArray[0] = 0xC0 | ((code & 0x7C0) >>> 6);
                byteArray[1] = 0x80 | (code & 0x3F);
            } else {
                byteArray[0] = code;
            }
        }

        this.parsedData.push(byteArray);
    }

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

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

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

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

QRCodeModel.prototype = {
    addData: function(data, binary) {
        var newData = new QR8bitByte(data, binary);
        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][0];
    },
    getEye: function(row, col) {
        if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) {
            throw new Error(row + "," + col);
        }

        var block = this.modules[row][col]; // [isDark(ture/false), EyeOuterOrInner(O/I), Position(TL/TR/BL/A) ]

        if (block[1]) {
            var type = 'P' + block[1] + '_' + block[2]; //PO_TL, PI_TL, PO_TR, PI_TR, PO_BL, PI_BL
            if (block[2] == 'A') {
                type = 'A' + block[1]; // AI, AO
            }

            return {
                isDarkBlock: block[0],
                type: type
            };
        } else {
            return null;
        }
    },
    getModuleCount: function() {
        return this.moduleCount;
    },
    make: function() {
        this.makeImpl(false, this.getBestMaskPattern());
    },
    makeImpl: function(test, maskPattern) {
        this.moduleCount = this.typeNumber * 4 + 17;
        this.modules = new Array(this.moduleCount);
        for (var row = 0; row < this.moduleCount; row++) {
            this.modules[row] = new Array(this.moduleCount);
            for (var col = 0; col < this.moduleCount; col++) {
                this.modules[row][col] = []; // [isDark(ture/false), EyeOuterOrInner(O/I), Position(TL/TR/BL) ]
            }
        }
        this.setupPositionProbePattern(0, 0, 'TL'); // TopLeft, TL
        this.setupPositionProbePattern(this.moduleCount - 7, 0, 'BL'); // BotoomLeft, BL
        this.setupPositionProbePattern(0, this.moduleCount - 7, 'TR'); // TopRight, TR
        this.setupPositionAdjustPattern('A'); // Alignment, A
        this.setupTimingPattern();
        this.setupTypeInfo(test, maskPattern);
        if (this.typeNumber >= 7) {
            this.setupTypeNumber(test);
        }
        if (this.dataCache == null) {
            this.dataCache = QRCodeModel.createData(this.typeNumber, this.errorCorrectLevel, this.dataList);
        }
        this.mapData(this.dataCache, maskPattern);
    },
    setupPositionProbePattern: function(row, col, posName) {
        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][0] = true;

                    this.modules[row + r][col + c][2] = posName; // Position
                    if (r == -0 || c == -0 || r == 6 || c == 6) {
                        this.modules[row + r][col + c][1] = 'O'; // Position Outer
                    } else {
                        this.modules[row + r][col + c][1] = 'I'; // Position Inner
                    }
                } else {
                    this.modules[row + r][col + c][0] = 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][0];
                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][0] != null) {
                continue;
            }
            this.modules[r][6][0] = (r % 2 == 0);
        }
        for (var c = 8; c < this.moduleCount - 8; c++) {
            if (this.modules[6][c][0] != null) {
                continue;
            }
            this.modules[6][c][0] = (c % 2 == 0);
        }
    },
    setupPositionAdjustPattern: function(posName) {
        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][0] != 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][0] = true;
                            this.modules[row + r][col + c][2] = posName; // Position
                            if (r == -2 || c == -2 || r == 2 || c == 2) {
                                this.modules[row + r][col + c][1] = 'O'; // Position Outer
                            } else {
                                this.modules[row + r][col + c][1] = 'I'; // Position Inner
                            }
                        } else {
                            this.modules[row + r][col + c][0] = 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][0] = 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)][0] = mod;
        }
    },
    setupTypeInfo: function(test, maskPattern) {
        var data = (this.errorCorrectLevel << 3) | maskPattern;
        var bits = QRUtil.getBCHTypeInfo(data);
        for (var i = 0; i < 15; i++) {
            var mod = (!test && ((bits >> i) & 1) == 1);
            if (i < 6) {
                this.modules[i][8][0] = mod;
            } else if (i < 8) {
                this.modules[i + 1][8][0] = mod;
            } else {
                this.modules[this.moduleCount - 15 + i][8][0] = mod;
            }
        }
        for (var i = 0; i < 15; i++) {
            var mod = (!test && ((bits >> i) & 1) == 1);
            if (i < 8) {
                this.modules[8][this.moduleCount - i - 1][0] = mod;
            } else if (i < 9) {
                this.modules[8][15 - i - 1 + 1][0] = mod;
            } else {
                this.modules[8][15 - i - 1][0] = mod;
            }
        }
        this.modules[this.moduleCount - 8][8][0] = (!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][0] == 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][0] = dark;
                        bitIndex--;
                        if (bitIndex == -1) {
                            byteIndex++;
                            bitIndex = 7;
                        }
                    }
                }
                row += inc;
                if (row < 0 || this.moduleCount <= row) {
                    row -= inc;
                    inc = -inc;
                    break;
                }
            }
        }
    }
};
QRCodeModel.PAD0 = 0xEC;
QRCodeModel.PAD1 = 0x11;
QRCodeModel.createData = function(typeNumber, errorCorrectLevel, dataList) {
    var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel);
    var buffer = new QRBitBuffer();
    for (var i = 0; i < dataList.length; i++) {
        var data = dataList[i];
        buffer.put(data.mode, 4);
        buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber));
        data.write(buffer);
    }
    var totalDataCount = 0;
    for (var i = 0; i < rsBlocks.length; i++) {
        totalDataCount += rsBlocks[i].dataCount;
    }
    if (buffer.getLengthInBits() > totalDataCount * 8) {
        throw new Error("code length overflow. (" +
            buffer.getLengthInBits() +
            ">" +
            totalDataCount * 8 +
            ")");
    }
    if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) {
        buffer.put(0, 4);
    }
    while (buffer.getLengthInBits() % 8 != 0) {
        buffer.putBit(false);
    }
    while (true) {
        if (buffer.getLengthInBits() >= totalDataCount * 8) {
            break;
        }
        buffer.put(QRCodeModel.PAD0, 8);
        if (buffer.getLengthInBits() >= totalDataCount * 8) {
            break;
        }
        buffer.put(QRCodeModel.PAD1, 8);
    }
    return QRCodeModel.createBytes(buffer, rsBlocks);
};
QRCodeModel.createBytes = function(buffer, rsBlocks) {
    var offset = 0;
    var maxDcCount = 0;
    var maxEcCount = 0;
    var dcdata = new Array(rsBlocks.length);
    var ecdata = new Array(rsBlocks.length);
    for (var r = 0; r < rsBlocks.length; r++) {
        var dcCount = rsBlocks[r].dataCount;
        var ecCount = rsBlocks[r].totalCount - dcCount;
        maxDcCount = Math.max(maxDcCount, dcCount);
        maxEcCount = Math.max(maxEcCount, ecCount);
        dcdata[r] = new Array(dcCount);
        for (var i = 0; i < dcdata[r].length; i++) {
            dcdata[r][i] = 0xff & buffer.buffer[i + offset];
        }
        offset += dcCount;
        var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
        var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1);
        var modPoly = rawPoly.mod(rsPoly);
        ecdata[r] = new Array(rsPoly.getLength() - 1);
        for (var i = 0; i < ecdata[r].length; i++) {
            var modIndex = i + modPoly.getLength() - ecdata[r].length;
            ecdata[r][i] = (modIndex >= 0) ? modPoly.get(modIndex) : 0;
        }
    }
    var totalCodeCount = 0;
    for (var i = 0; i < rsBlocks.length; i++) {
        totalCodeCount += rsBlocks[i].totalCount;
    }
    var data = new Array(totalCodeCount);
    var index = 0;
    for (var i = 0; i < maxDcCount; i++) {
        for (var r = 0; r < rsBlocks.length; r++) {
            if (i < dcdata[r].length) {
                data[index++] = dcdata[r][i];
            }
        }
    }
    for (var i = 0; i < maxEcCount; i++) {
        for (var r = 0; r < rsBlocks.length; r++) {
            if (i < ecdata[r].length) {
                data[index++] = ecdata[r][i];
            }
        }
    }
    return data;
};
var QRMode = {
    MODE_NUMBER: 1 << 0,
    MODE_ALPHA_NUM: 1 << 1,
    MODE_8BIT_BYTE: 1 << 2,
    MODE_KANJI: 1 << 3
};
var QRErrorCorrectLevel = {
    L: 1,
    M: 0,
    Q: 3,
    H: 2
};
var QRMaskPattern = {
    PATTERN000: 0,
    PATTERN001: 1,
    PATTERN010: 2,
    PATTERN011: 3,
    PATTERN100: 4,
    PATTERN101: 5,
    PATTERN110: 6,
    PATTERN111: 7
};
var QRUtil = {
    PATTERN_POSITION_TABLE: [
        [],
        [6, 18],
        [6, 22],
        [6, 26],
        [6, 30],
        [6, 34],
        [6, 22, 38],
        [6, 24, 42],
        [6, 26, 46],
        [6, 28, 50],
        [6, 30, 54],
        [6, 32, 58],
        [6, 34, 62],
        [6, 26, 46, 66],
        [6, 26, 48, 70],
        [6, 26, 50, 74],
        [6, 30, 54, 78],
        [6, 30, 56, 82],
        [6, 30, 58, 86],
        [6, 34, 62, 90],
        [6, 28, 50, 72, 94],
        [6, 26, 50, 74, 98],
        [6, 30, 54, 78, 102],
        [6, 28, 54, 80, 106],
        [6, 32, 58, 84, 110],
        [6, 30, 58, 86, 114],
        [6, 34, 62, 90, 118],
        [6, 26, 50, 74, 98, 122],
        [6, 30, 54, 78, 102, 126],
        [6, 26, 52, 78, 104, 130],
        [6, 30, 56, 82, 108, 134],
        [6, 34, 60, 86, 112, 138],
        [6, 30, 58, 86, 114, 142],
        [6, 34, 62, 90, 118, 146],
        [6, 30, 54, 78, 102, 126, 150],
        [6, 24, 50, 76, 102, 128, 154],
        [6, 28, 54, 80, 106, 132, 158],
        [6, 32, 58, 84, 110, 136, 162],
        [6, 26, 54, 82, 110, 138, 166],
        [6, 30, 58, 86, 114, 142, 170]
    ],
    G15: (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0),
    G18: (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0),
    G15_MASK: (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1),
    getBCHTypeInfo: function(data) {
        var d = data << 10;
        while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) {
            d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15)));
        }
        return ((data << 10) | d) ^ QRUtil.G15_MASK;
    },
    getBCHTypeNumber: function(data) {
        var d = data << 12;
        while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) {
            d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18)));
        }
        return (data << 12) | d;
    },
    getBCHDigit: function(data) {
        var digit = 0;
        while (data != 0) {
            digit++;
            data >>>= 1;
        }
        return digit;
    },
    getPatternPosition: function(typeNumber) {
        return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1];
    },
    getMask: function(maskPattern, i, j) {
        switch (maskPattern) {
            case QRMaskPattern.PATTERN000:
                return (i + j) % 2 == 0;
            case QRMaskPattern.PATTERN001:
                return i % 2 == 0;
            case QRMaskPattern.PATTERN010:
                return j % 3 == 0;
            case QRMaskPattern.PATTERN011:
                return (i + j) % 3 == 0;
            case QRMaskPattern.PATTERN100:
                return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0;
            case QRMaskPattern.PATTERN101:
                return (i * j) % 2 + (i * j) % 3 == 0;
            case QRMaskPattern.PATTERN110:
                return ((i * j) % 2 + (i * j) % 3) % 2 == 0;
            case QRMaskPattern.PATTERN111:
                return ((i * j) % 3 + (i + j) % 2) % 2 == 0;
            default:
                throw new Error("bad maskPattern:" + maskPattern);
        }
    },
    getErrorCorrectPolynomial: function(errorCorrectLength) {
        var a = new QRPolynomial([1], 0);
        for (var i = 0; i < errorCorrectLength; i++) {
            a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0));
        }
        return a;
    },
    getLengthInBits: function(mode, type) {
        if (1 <= type && type < 10) {
            switch (mode) {
                case QRMode.MODE_NUMBER:
                    return 10;
                case QRMode.MODE_ALPHA_NUM:
                    return 9;
                case QRMode.MODE_8BIT_BYTE:
                    return 8;
                case QRMode.MODE_KANJI:
                    return 8;
                default:
                    throw new Error("mode:" + mode);
            }
        } else if (type < 27) {
            switch (mode) {
                case QRMode.MODE_NUMBER:
                    return 12;
                case QRMode.MODE_ALPHA_NUM:
                    return 11;
                case QRMode.MODE_8BIT_BYTE:
                    return 16;
                case QRMode.MODE_KANJI:
                    return 10;
                default:
                    throw new Error("mode:" + mode);
            }
        } else if (type < 41) {
            switch (mode) {
                case QRMode.MODE_NUMBER:
                    return 14;
                case QRMode.MODE_ALPHA_NUM:
                    return 13;
                case QRMode.MODE_8BIT_BYTE:
                    return 16;
                case QRMode.MODE_KANJI:
                    return 12;
                default:
                    throw new Error("mode:" + mode);
            }
        } else {
            throw new Error("type:" + type);
        }
    },
    getLostPoint: function(qrCode) {
        var moduleCount = qrCode.getModuleCount();
        var lostPoint = 0;
        for (var row = 0; row < moduleCount; row++) {
            for (var col = 0; col < moduleCount; col++) {
                var sameCount = 0;
                var dark = qrCode.isDark(row, col);
                for (var r = -1; r <= 1; r++) {
                    if (row + r < 0 || moduleCount <= row + r) {
                        continue;
                    }
                    for (var c = -1; c <= 1; c++) {
                        if (col + c < 0 || moduleCount <= col + c) {
                            continue;
                        }
                        if (r == 0 && c == 0) {
                            continue;
                        }
                        if (dark == qrCode.isDark(row + r, col + c)) {
                            sameCount++;
                        }
                    }
                }
                if (sameCount > 5) {
                    lostPoint += (3 + sameCount - 5);
                }
            }
        }
        for (var row = 0; row < moduleCount - 1; row++) {
            for (var col = 0; col < moduleCount - 1; col++) {
                var count = 0;
                if (qrCode.isDark(row, col)) count++;
                if (qrCode.isDark(row + 1, col)) count++;
                if (qrCode.isDark(row, col + 1)) count++;
                if (qrCode.isDark(row + 1, col + 1)) count++;
                if (count == 0 || count == 4) {
                    lostPoint += 3;
                }
            }
        }
        for (var row = 0; row < moduleCount; row++) {
            for (var col = 0; col < moduleCount - 6; col++) {
                if (qrCode.isDark(row, col) && !qrCode.isDark(row, col + 1) && qrCode.isDark(row, col + 2) &&
                    qrCode.isDark(
                        row,
                        col + 3) && qrCode.isDark(row, col + 4) && !qrCode.isDark(row, col + 5) && qrCode.isDark(
                        row, col + 6)) {
                    lostPoint += 40;
                }
            }
        }
        for (var col = 0; col < moduleCount; col++) {
            for (var row = 0; row < moduleCount - 6; row++) {
                if (qrCode.isDark(row, col) && !qrCode.isDark(row + 1, col) && qrCode.isDark(row + 2, col) &&
                    qrCode.isDark(
                        row +
                        3, col) && qrCode.isDark(row + 4, col) && !qrCode.isDark(row + 5, col) && qrCode.isDark(
                        row + 6, col)) {
                    lostPoint += 40;
                }
            }
        }
        var darkCount = 0;
        for (var col = 0; col < moduleCount; col++) {
            for (var row = 0; row < moduleCount; row++) {
                if (qrCode.isDark(row, col)) {
                    darkCount++;
                }
            }
        }
        var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
        lostPoint += ratio * 10;
        return lostPoint;
    }
};
var QRMath = {
    glog: function(n) {
        if (n < 1) {
            throw new Error("glog(" + n + ")");
        }
        return QRMath.LOG_TABLE[n];
    },
    gexp: function(n) {
        while (n < 0) {
            n += 255;
        }
        while (n >= 256) {
            n -= 255;
        }
        return QRMath.EXP_TABLE[n];
    },
    EXP_TABLE: new Array(256),
    LOG_TABLE: new Array(256)
};
for (var i = 0; i < 8; i++) {
    QRMath.EXP_TABLE[i] = 1 << i;
}
for (var i = 8; i < 256; i++) {
    QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] ^ QRMath.EXP_TABLE[i - 5] ^ QRMath.EXP_TABLE[i - 6] ^ QRMath.EXP_TABLE[
        i - 8];
}
for (var i = 0; i < 255; i++) {
    QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i;
}

function QRPolynomial(num, shift) {
    if (num.length == undefined) {
        throw new Error(num.length + "/" + shift);
    }
    var offset = 0;
    while (offset < num.length && num[offset] == 0) {
        offset++;
    }
    this.num = new Array(num.length - offset + shift);
    for (var i = 0; i < num.length - offset; i++) {
        this.num[i] = num[i + offset];
    }
}
QRPolynomial.prototype = {
    get: function(index) {
        return this.num[index];
    },
    getLength: function() {
        return this.num.length;
    },
    multiply: function(e) {
        var num = new Array(this.getLength() + e.getLength() - 1);
        for (var i = 0; i < this.getLength(); i++) {
            for (var j = 0; j < e.getLength(); j++) {
                num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i)) + QRMath.glog(e.get(j)));
            }
        }
        return new QRPolynomial(num, 0);
    },
    mod: function(e) {
        if (this.getLength() - e.getLength() < 0) {
            return this;
        }
        var ratio = QRMath.glog(this.get(0)) - QRMath.glog(e.get(0));
        var num = new Array(this.getLength());
        for (var i = 0; i < this.getLength(); i++) {
            num[i] = this.get(i);
        }
        for (var i = 0; i < e.getLength(); i++) {
            num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio);
        }
        return new QRPolynomial(num, 0).mod(e);
    }
};

function QRRSBlock(totalCount, dataCount) {
    this.totalCount = totalCount;
    this.dataCount = dataCount;
}
QRRSBlock.RS_BLOCK_TABLE = [
    [1, 26, 19],
    [1, 26, 16],
    [1, 26, 13],
    [1, 26, 9],
    [1, 44, 34],
    [1, 44, 28],
    [1, 44, 22],
    [1, 44, 16],
    [1, 70, 55],
    [1, 70, 44],
    [2, 35, 17],
    [2, 35, 13],
    [1, 100, 80],
    [2, 50, 32],
    [2, 50, 24],
    [4, 25, 9],
    [1, 134, 108],
    [2, 67, 43],
    [2, 33, 15, 2, 34, 16],
    [2, 33, 11, 2, 34, 12],
    [2, 86, 68],
    [4, 43, 27],
    [4, 43, 19],
    [4, 43, 15],
    [2, 98, 78],
    [4, 49, 31],
    [2, 32, 14, 4, 33, 15],
    [4, 39, 13, 1, 40, 14],
    [2, 121, 97],
    [2, 60, 38, 2, 61, 39],
    [4, 40, 18, 2, 41, 19],
    [4, 40, 14, 2, 41, 15],
    [2, 146, 116],
    [3, 58, 36, 2, 59, 37],
    [4, 36, 16, 4, 37, 17],
    [4, 36, 12, 4, 37, 13],
    [2, 86, 68, 2, 87, 69],
    [4, 69, 43, 1, 70, 44],
    [6, 43, 19, 2, 44, 20],
    [6, 43, 15, 2, 44, 16],
    [4, 101, 81],
    [1, 80, 50, 4, 81, 51],
    [4, 50, 22, 4, 51, 23],
    [3, 36, 12, 8, 37, 13],
    [2, 116, 92, 2, 117, 93],
    [6, 58, 36, 2, 59, 37],
    [4, 46, 20, 6, 47, 21],
    [7, 42, 14, 4, 43, 15],
    [4, 133, 107],
    [8, 59, 37, 1, 60, 38],
    [8, 44, 20, 4, 45, 21],
    [12, 33, 11, 4, 34, 12],
    [3, 145, 115, 1, 146, 116],
    [4, 64, 40, 5, 65, 41],
    [11, 36, 16, 5, 37, 17],
    [11, 36, 12, 5, 37, 13],
    [5, 109, 87, 1, 110, 88],
    [5, 65, 41, 5, 66, 42],
    [5, 54, 24, 7, 55, 25],
    [11, 36, 12, 7, 37, 13],
    [5, 122, 98, 1, 123, 99],
    [7, 73, 45, 3, 74, 46],
    [15, 43, 19, 2, 44, 20],
    [3, 45, 15, 13, 46, 16],
    [1, 135, 107, 5, 136, 108],
    [10, 74, 46, 1, 75, 47],
    [1, 50, 22, 15, 51, 23],
    [2, 42, 14, 17, 43, 15],
    [5, 150, 120, 1, 151, 121],
    [9, 69, 43, 4, 70, 44],
    [17, 50, 22, 1, 51, 23],
    [2, 42, 14, 19, 43, 15],
    [3, 141, 113, 4, 142, 114],
    [3, 70, 44, 11, 71, 45],
    [17, 47, 21, 4, 48, 22],
    [9, 39, 13, 16, 40, 14],
    [3, 135, 107, 5, 136, 108],
    [3, 67, 41, 13, 68, 42],
    [15, 54, 24, 5, 55, 25],
    [15, 43, 15, 10, 44, 16],
    [4, 144, 116, 4, 145, 117],
    [17, 68, 42],
    [17, 50, 22, 6, 51, 23],
    [19, 46, 16, 6, 47, 17],
    [2, 139, 111, 7, 140, 112],
    [17, 74, 46],
    [7, 54, 24, 16, 55, 25],
    [34, 37, 13],
    [4, 151, 121, 5, 152, 122],
    [4, 75, 47, 14, 76, 48],
    [11, 54, 24, 14, 55, 25],
    [16, 45, 15, 14, 46, 16],
    [6, 147, 117, 4, 148, 118],
    [6, 73, 45, 14, 74, 46],
    [11, 54, 24, 16, 55, 25],
    [30, 46, 16, 2, 47, 17],
    [8, 132, 106, 4, 133, 107],
    [8, 75, 47, 13, 76, 48],
    [7, 54, 24, 22, 55, 25],
    [22, 45, 15, 13, 46, 16],
    [10, 142, 114, 2, 143, 115],
    [19, 74, 46, 4, 75, 47],
    [28, 50, 22, 6, 51, 23],
    [33, 46, 16, 4, 47, 17],
    [8, 152, 122, 4, 153, 123],
    [22, 73, 45, 3, 74, 46],
    [8, 53, 23, 26, 54, 24],
    [12, 45, 15, 28, 46, 16],
    [3, 147, 117, 10, 148, 118],
    [3, 73, 45, 23, 74, 46],
    [4, 54, 24, 31, 55, 25],
    [11, 45, 15, 31, 46, 16],
    [7, 146, 116, 7, 147, 117],
    [21, 73, 45, 7, 74, 46],
    [1, 53, 23, 37, 54, 24],
    [19, 45, 15, 26, 46, 16],
    [5, 145, 115, 10, 146, 116],
    [19, 75, 47, 10, 76, 48],
    [15, 54, 24, 25, 55, 25],
    [23, 45, 15, 25, 46, 16],
    [13, 145, 115, 3, 146, 116],
    [2, 74, 46, 29, 75, 47],
    [42, 54, 24, 1, 55, 25],
    [23, 45, 15, 28, 46, 16],
    [17, 145, 115],
    [10, 74, 46, 23, 75, 47],
    [10, 54, 24, 35, 55, 25],
    [19, 45, 15, 35, 46, 16],
    [17, 145, 115, 1, 146, 116],
    [14, 74, 46, 21, 75, 47],
    [29, 54, 24, 19, 55, 25],
    [11, 45, 15, 46, 46, 16],
    [13, 145, 115, 6, 146, 116],
    [14, 74, 46, 23, 75, 47],
    [44, 54, 24, 7, 55, 25],
    [59, 46, 16, 1, 47, 17],
    [12, 151, 121, 7, 152, 122],
    [12, 75, 47, 26, 76, 48],
    [39, 54, 24, 14, 55, 25],
    [22, 45, 15, 41, 46, 16],
    [6, 151, 121, 14, 152, 122],
    [6, 75, 47, 34, 76, 48],
    [46, 54, 24, 10, 55, 25],
    [2, 45, 15, 64, 46, 16],
    [17, 152, 122, 4, 153, 123],
    [29, 74, 46, 14, 75, 47],
    [49, 54, 24, 10, 55, 25],
    [24, 45, 15, 46, 46, 16],
    [4, 152, 122, 18, 153, 123],
    [13, 74, 46, 32, 75, 47],
    [48, 54, 24, 14, 55, 25],
    [42, 45, 15, 32, 46, 16],
    [20, 147, 117, 4, 148, 118],
    [40, 75, 47, 7, 76, 48],
    [43, 54, 24, 22, 55, 25],
    [10, 45, 15, 67, 46, 16],
    [19, 148, 118, 6, 149, 119],
    [18, 75, 47, 31, 76, 48],
    [34, 54, 24, 34, 55, 25],
    [20, 45, 15, 61, 46, 16]
];
QRRSBlock.getRSBlocks = function(typeNumber, errorCorrectLevel) {
    var rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel);
    if (rsBlock == undefined) {
        throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel);
    }
    var length = rsBlock.length / 3;
    var list = [];
    for (var i = 0; i < length; i++) {
        var count = rsBlock[i * 3 + 0];
        var totalCount = rsBlock[i * 3 + 1];
        var dataCount = rsBlock[i * 3 + 2];
        for (var j = 0; j < count; j++) {
            list.push(new QRRSBlock(totalCount, dataCount));
        }
    }
    return list;
};
QRRSBlock.getRsBlockTable = function(typeNumber, errorCorrectLevel) {
    switch (errorCorrectLevel) {
        case QRErrorCorrectLevel.L:
            return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0];
        case QRErrorCorrectLevel.M:
            return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1];
        case QRErrorCorrectLevel.Q:
            return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2];
        case QRErrorCorrectLevel.H:
            return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3];
        default:
            return undefined;
    }
};

function QRBitBuffer() {
    this.buffer = [];
    this.length = 0;
}
QRBitBuffer.prototype = {
    get: function(index) {
        var bufIndex = Math.floor(index / 8);
        return ((this.buffer[bufIndex] >>> (7 - index % 8)) & 1) == 1;
    },
    put: function(num, length) {
        for (var i = 0; i < length; i++) {
            this.putBit(((num >>> (length - i - 1)) & 1) == 1);
        }
    },
    getLengthInBits: function() {
        return this.length;
    },
    putBit: function(bit) {
        var bufIndex = Math.floor(this.length / 8);
        if (this.buffer.length <= bufIndex) {
            this.buffer.push(0);
        }
        if (bit) {
            this.buffer[bufIndex] |= (0x80 >>> (this.length % 8));
        }
        this.length++;
    }
};
var QRCodeLimitLength = [
    [17, 14, 11, 7],
    [32, 26, 20, 14],
    [53, 42, 32, 24],
    [78, 62, 46, 34],
    [106, 84, 60, 44],
    [134, 106, 74, 58],
    [154, 122, 86, 64],
    [192, 152, 108, 84],
    [230, 180, 130, 98],
    [271, 213, 151, 119],
    [321, 251, 177, 137],
    [367, 287, 203, 155],
    [425, 331, 241, 177],
    [458, 362, 258, 194],
    [520, 412, 292, 220],
    [586, 450, 322, 250],
    [644, 504, 364, 280],
    [718, 560, 394, 310],
    [792, 624, 442, 338],
    [858, 666, 482, 382],
    [929, 711, 509, 403],
    [1003, 779, 565, 439],
    [1091, 857, 611, 461],
    [1171, 911, 661, 511],
    [1273, 997, 715, 535],
    [1367, 1059, 751, 593],
    [1465, 1125, 805, 625],
    [1528, 1190, 868, 658],
    [1628, 1264, 908, 698],
    [1732, 1370, 982, 742],
    [1840, 1452, 1030, 790],
    [1952, 1538, 1112, 842],
    [2068, 1628, 1168, 898],
    [2188, 1722, 1228, 958],
    [2303, 1809, 1283, 983],
    [2431, 1911, 1351, 1051],
    [2563, 1989, 1423, 1093],
    [2699, 2099, 1499, 1139],
    [2809, 2213, 1579, 1219],
    [2953, 2331, 1663, 1273]
];

/**
 * Get the type by string length
 *
 * @private
 * @param {String} sText
 * @param {Number} nCorrectLevel
 * @return {Number} type
 */
function _getTypeNumber(sText, _htOption) {

    var nCorrectLevel = _htOption.correctLevel;


    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");
    }

    if (_htOption.version != 0) {
        if (nType <= _htOption.version) {
            nType = _htOption.version;
            _htOption.runVersion = nType;
        } else {
            console.warn("QR Code version " + _htOption.version + " too small, run version use " + nType);
            _htOption.runVersion = nType;
        }
    }


    return nType;
}

function _getUTF8Length(sText) {
    var replacedText = encodeURI(sText).toString().replace(/\%[0-9a-fA-F]{2}/g, 'a');
    return replacedText.length + (replacedText.length != sText.length ? 3 : 0);
}

/**
 * Drawing QRCode by using canvas
 *
 * @constructor
 * @param {HTMLElement} el
 * @param {Object} htOption QRCode Options
 */
var Drawing = function(htOption) {
    this._bIsPainted = false;
    this._htOption = htOption;
    this._canvas = createCanvas(200, 200)
    if (this._htOption._drawer == 'svg') {
        this._oContext = {};
    } else {
        this._oContext = this._canvas.getContext("2d");
    }

    this._bSupportDataURI = null;
};

/**
 * Draw the QRCode
 *
 * @param {QRCode} oQRCode
 */
Drawing.prototype.draw = function(oQRCode) {
    var _htOption = this._htOption;

    if (!_htOption.title && !_htOption.subTitle) {
        _htOption.height -= _htOption.titleHeight;
        _htOption.titleHeight = 0;
    }

    var nCount = oQRCode.getModuleCount();
    var nWidth = Math.round(_htOption.width / nCount);
    var nHeight = Math.round((_htOption.height - _htOption.titleHeight) / nCount);

    _htOption.quietZone = Math.round(_htOption.quietZone);

    _htOption.width = nWidth * nCount;
    _htOption.height = nHeight * nCount + _htOption.titleHeight;

    this._canvas.width = _htOption.width + _htOption.quietZone * 2;
    this._canvas.height = _htOption.height + _htOption.quietZone * 2;

    if (_htOption._drawer == 'svg') {
        this._oContext = new C2S({
            document: win.document,
            XMLSerializer: win.XMLSerializer,
            width: this._canvas.width,
            height: this._canvas.height
        });
    }

    this._oContext.patternQuality = 'best'; //'fast'|'good'|'best'|'nearest'|'bilinear'
    this._oContext.quality = 'best'; //'fast'|'good'|'best'|'nearest'|'bilinear'
    this._oContext.textDrawingMode = 'path'; // 'path'|'glyph'
    this._oContext.antialias = 'gray'; // 'default'|'none'|'gray'|'subpixel'

    var _oContext = this._oContext;

    var autoColorDark = _htOption.autoColorDark;
    var autoColorLight = _htOption.autoColorLight;
    var notAutoColorLight = "rgba(0,0,0,0)";

    // JPG
    if (_htOption.format == 'JPG') {

        _htOption.logoBackgroundTransparent = false;

        autoColorDark = _htOption.colorDark;
        autoColorLight = _htOption.colorLight;
        notAutoColorLight = _htOption.colorLight;

        if (_htOption.backgroundImage) {
            _oContext.fillStyle = _htOption.colorLight;
            _oContext.fillRect(0, 0, this._canvas.width, this._canvas.height);
        } else {
            if (_htOption.quietZoneColor == "rgba(0,0,0,0)" || _htOption.quietZoneColor == "transparent") {
                _htOption.quietZoneColor = '#ffffff';
            }
            _oContext.fillStyle = _htOption.colorLight;
            _oContext.fillRect(0, 0, this._canvas.width, this._canvas.height);

        }
    } else {
        _oContext.lineWidth = 0;
        _oContext.fillStyle = _htOption.colorLight;
        _oContext.fillRect(0, 0, this._canvas.width, this._canvas.height);
    }


    var t = this;

    function drawQuietZoneColor() {
        if (_htOption.quietZone > 0 && _htOption.quietZoneColor) {
            // top
            _oContext.lineWidth = 0;
            _oContext.fillStyle = _htOption.quietZoneColor;

            _oContext.fillRect(0, 0, t._canvas.width, _htOption.quietZone);
            // left
            _oContext.fillRect(0, _htOption.quietZone, _htOption.quietZone, t._canvas.height - _htOption.quietZone *
                2);
            // right
            _oContext.fillRect(t._canvas.width - _htOption.quietZone, _htOption.quietZone, _htOption.quietZone, t._canvas
                .height - _htOption.quietZone * 2);
            // bottom
            _oContext.fillRect(0, t._canvas.height - _htOption.quietZone, t._canvas.width, _htOption.quietZone);
        }
    }

    if (_htOption.backgroundImage) {

        // backgroundImage
        var bgImg = new Image();
        bgImg.onload = function() {
            _oContext.globalAlpha = 1;
            _oContext.globalAlpha = _htOption.backgroundImageAlpha;
            _oContext.drawImage(bgImg, 0, _htOption.titleHeight, _htOption.width + _htOption.quietZone * 2,
                _htOption.height +
                _htOption.quietZone * 2 - _htOption.titleHeight);
            _oContext.globalAlpha = 1;

            drawQrcode.call(t, oQRCode);
        }
        bgImg.onerror = function(error){
            t.reject(error);
        }
        bgImg.src = _htOption.backgroundImage;
        // DoSomething
    } else {
        drawQrcode.call(t, oQRCode);
    }

    function drawQrcode(oQRCode) {
        for (var row = 0; row < nCount; row++) {
            for (var col = 0; col < nCount; col++) {
                var nLeft = col * nWidth + _htOption.quietZone;
                var nTop = row * nHeight + _htOption.quietZone;

                var bIsDark = oQRCode.isDark(row, col);

                var eye = oQRCode.getEye(row, col); // { isDark: true/false, type: PO_TL, PI_TL, PO_TR, PI_TR, PO_BL, PI_BL };

                var nowDotScale = _htOption.dotScale;

                _oContext.lineWidth = 0;
                // Color handler
                var dColor;
                var lColor;
                if (eye) {
                    dColor = _htOption[eye.type] || _htOption[eye.type.substring(
                            0, 2)] ||
                        _htOption.colorDark;
                    lColor = _htOption.colorLight;
                } else {
                    if (_htOption.backgroundImage) {

                        lColor = "rgba(0,0,0,0)";
                        if (row == 6) {
                            // dColor = _htOption.timing_H || _htOption.timing || _htOption.colorDark;
                            if (_htOption.autoColor) {
                                dColor = _htOption.timing_H || _htOption.timing || _htOption.autoColorDark;
                                lColor = _htOption.timing_H || _htOption.timing || _htOption.autoColorLight;
                            } else {
                                dColor = _htOption.timing_H || _htOption.timing || _htOption.colorDark;
                            }
                        } else if (col == 6) {
                            // dColor = _htOption.timing_V || _htOption.timing || _htOption.colorDark;
                            if (_htOption.autoColor) {
                                dColor = _htOption.timing_V || _htOption.timing || _htOption.autoColorDark;
                                lColor = _htOption.timing_V || _htOption.timing || _htOption.autoColorLight;
                            } else {
                                dColor = _htOption.timing_V || _htOption.timing ||
                                    _htOption.colorDark;
                            }
                        } else {
                            if (_htOption.autoColor) {
                                dColor = _htOption.autoColorDark;
                                lColor = _htOption.autoColorLight;
                            } else {
                                dColor = _htOption.colorDark;
                            }
                        }

                    } else {
                        if (row == 6) {
                            dColor = _htOption.timing_H || _htOption.timing || _htOption.colorDark;
                        } else if (col == 6) {
                            dColor = _htOption.timing_V || _htOption.timing ||
                                _htOption.colorDark;
                        } else {
                            dColor = _htOption.colorDark;
                        }
                        lColor = _htOption.colorLight;
                    }
                }
                _oContext.strokeStyle = bIsDark ? dColor :
                    lColor;
                _oContext.fillStyle = bIsDark ? dColor :
                    lColor;

                if (eye) {
                    // Is eye
                    bIsDark = eye.isDarkBlock;
                    var type = eye.type;
                    if (type == 'AO') {
                        nowDotScale = _htOption.dotScaleAO;
                    } else if (type == 'AI') {
                        nowDotScale = _htOption.dotScaleAI;
                    }

                    if (_htOption.backgroundImage && _htOption.autoColor) {
                        dColor = ((eye.type == 'AO') ? _htOption.AI : _htOption.AO) ||
                            _htOption.autoColorDark;
                        lColor = _htOption.autoColorLight;
                    } else {
                        dColor = ((eye.type == 'AO') ? _htOption.AI : _htOption.AO) ||
                            dColor;
                    }

                    _oContext.fillRect(nLeft + nWidth * (1 - nowDotScale) / 2, _htOption.titleHeight + nTop +
                        nHeight * (1 - nowDotScale) / 2, nWidth * nowDotScale, nHeight * nowDotScale);
                } else {

                    if (row == 6) {
                        // Timing Pattern
                        nowDotScale = _htOption.dotScaleTiming_H;

                        _oContext.fillRect(nLeft + nWidth * (1 - nowDotScale) / 2, _htOption.titleHeight + nTop +
                            nHeight * (1 -
                                nowDotScale) / 2, nWidth * nowDotScale, nHeight * nowDotScale);
                    } else if (col == 6) {
                        // Timing Pattern
                        nowDotScale = _htOption.dotScaleTiming_V;

                        _oContext.fillRect(nLeft + nWidth * (1 - nowDotScale) / 2, _htOption.titleHeight + nTop +
                            nHeight * (1 -
                                nowDotScale) / 2, nWidth * nowDotScale, nHeight * nowDotScale);
                    } else {

                        if (_htOption.backgroundImage) {

                            _oContext.fillRect(nLeft + nWidth * (1 - nowDotScale) / 2, _htOption.titleHeight + nTop +
                                nHeight * (1 -
                                    nowDotScale) / 2, nWidth * nowDotScale, nHeight * nowDotScale);

                        } else {


                            _oContext.fillRect(nLeft + nWidth * (1 - nowDotScale) / 2, _htOption.titleHeight + nTop +
                                nHeight * (1 -
                                    nowDotScale) / 2, nWidth * nowDotScale, nHeight * nowDotScale);

                        }
                    }
                }

                if (_htOption.dotScale != 1 && !eye) {
                    _oContext.strokeStyle = _htOption.colorLight;
                }

            }
        }

        if (_htOption.title) {
            _oContext.fillStyle = _htOption.titleBackgroundColor;
            _oContext.fillRect(0, 0, t._canvas.width, _htOption.titleHeight + this._htOption.quietZone);

            _oContext.font = _htOption.titleFont;
            _oContext.fillStyle = _htOption.titleColor;
            _oContext.textAlign = 'center';
            _oContext.fillText(_htOption.title, t._canvas.width / 2, this._htOption.quietZone + this._htOption.titleTop);
        }

        if (_htOption.subTitle) {
            _oContext.font = _htOption.subTitleFont;
            _oContext.fillStyle = _htOption.subTitleColor;
            _oContext.fillText(_htOption.subTitle, t._canvas.width / 2, this._htOption.quietZone + this._htOption.subTitleTop);
        }

        if (_htOption.logo) {
            var img = new Image();
            img.src = _htOption.logo;
            var _this = this;

            function generateLogoImg(img) {
                var imgContainerW = Math.round(_htOption.width / 3.5);
                var imgContainerH = Math.round(_htOption.height / 3.5);
                if (imgContainerW !== imgContainerH) {
                    imgContainerW = imgContainerH;
                }

                if (_htOption.logoWidth) {
                    imgContainerW = Math.round(_htOption.logoWidth);
                }
                if (_htOption.logoHeight) {
                    imgContainerH = Math.round(_htOption.logoHeight);
                }

                var imgContainerX = (_htOption.width + _htOption.quietZone * 2 - imgContainerW) / 2;
                var imgContainerY = (_htOption.height + _htOption.titleHeight + _htOption.quietZone *
                    2 - imgContainerH) / 2;

                // Did Not Use Transparent Logo Image
                if (!_htOption.logoBackgroundTransparent) {
                    //if (!_htOption.logoBackgroundColor) {
                    //_htOption.logoBackgroundColor = '#ffffff';
                    //}
                    _oContext.fillStyle = _htOption.logoBackgroundColor;

                    _oContext.fillRect(imgContainerX, imgContainerY, imgContainerW, imgContainerH);
                }
                var nw;
                var nh;
                if (typeof img.naturalWidth == "undefined") {
                    // IE 6/7/8
                    nw = img.width;
                    nh = img.height;
                } else {
                    // HTML5 browsers
                    nw = img.naturalWidth;
                    nh = img.naturalHeight;
                }

                var imgScale = Math.min(imgContainerW / nw, imgContainerH / nh);
                var imgW = nw * imgScale;
                var imgH = nh * imgScale;

                _oContext.drawImage(img, imgContainerX + (imgContainerW - imgW) / 2, imgContainerY +
                    (imgContainerH - imgH) / 2, imgW, imgH);

                drawQuietZoneColor();
                _this._bIsPainted = true;
                _this.makeImage();
            }



            img.onload = function() {
                generateLogoImg(img);
            }

            img.onerror = function(e) {
                console.error(e)
            }

            if (img.complete) {
                img.onload = null;
                generateLogoImg(img);
                return;
            }

        } else {
            drawQuietZoneColor();
            this._bIsPainted = true;
            this.makeImage();
        }



    }

};

/**
 * Make the image from Canvas
 */
Drawing.prototype.makeImage = function() {

    var makeOptions = this.makeOptions;
    var t = this;

    if (makeOptions.makeType == 'FILE') {

        if (this._htOption.onRenderingStart) {
            this._htOption.onRenderingStart(this._htOption);
        }
        if (this._htOption._drawer == 'svg') {
            let data = this._oContext.getSerializedSvg();
            fs.writeFile(makeOptions.path, data, 'utf8', function(err) {
                if (err) {
                    t.reject(err);
                }
                t.resolve({});
            });
        } else {
            var out = fs.createWriteStream(makeOptions.path)

            var stream = undefined;

            if (this._htOption.format == 'PNG') {
                stream = this._canvas.createPNGStream({
                    compressionLevel: this._htOption.compressionLevel
                })
            } else {
                stream = this._canvas.createJPEGStream({
                    quality: this._htOption.quality
                })
            }

            stream.pipe(out);
            out.on('finish', () => {
                t.resolve({});
            })
        }

    } else if (makeOptions.makeType == 'URL') {



        if (this._htOption.onRenderingStart) {
            this._htOption.onRenderingStart(this._htOption);
        }
        if (this._htOption._drawer == 'svg') {
            let data = this._oContext.getSerializedSvg();
            t.resolve(data);
        } else {
            if (this._htOption.format == 'PNG') {
                // dataUrl = this._canvas.toDataURL()
                this._canvas.toDataURL((err, data) => {
                    t.resolve(data);
                }) // defaults to PNG
            } else {
                this._canvas.toDataURL('image/jpeg', (err, data) => {
                    t.resolve(data);
                })
            }
        }
    }
};

/**
 * Return whether the QRCode is painted or not
 *
 * @return {Boolean}
 */
Drawing.prototype.isPainted = function() {
    return this._bIsPainted;
};

/**
 * @private
 * @param {Number} nNumber
 */
Drawing.prototype.round = function(nNumber) {
    if (!nNumber) {
        return nNumber;
    }
    return Math.floor(nNumber * 1000) / 1000;
};


function QRCode(vOption) {
    this._htOption = {
        width: 256,
        height: 256,
        typeNumber: 4,
        colorDark: "#000000",
        colorLight: "#ffffff",
        correctLevel: QRErrorCorrectLevel.H,

        dotScale: 1, // For body block, must be greater than 0, less than or equal to 1. default is 1

        dotScaleTiming: 1, // Dafault for timing block , must be greater than 0, less than or equal to 1. default is 1
        dotScaleTiming_H: undefined, // For horizontal timing block, must be greater than 0, less than or equal to 1. default is 1
        dotScaleTiming_V: undefined, // For vertical timing block, must be greater than 0, less than or equal to 1. default is 1

        dotScaleA: 1, // Dafault for alignment block, must be greater than 0, less than or equal to 1. default is 1
        dotScaleAO: undefined, // For alignment outer block, must be greater than 0, less than or equal to 1. default is 1
        dotScaleAI: undefined, // For alignment inner block, must be greater than 0, less than or equal to 1. default is 1

        quietZone: 0,
        quietZoneColor: "rgba(0,0,0,0)",

        title: "",
        titleFont: "bold 16px Arial",
        titleColor: "#000000",
        titleBackgroundColor: "#ffffff",
        titleHeight: 0, // Title Height, Include subTitle
        titleTop: 30, // draws y coordinates. default is 30

        subTitle: "",
        subTitleFont: "14px Arial",
        subTitleColor: "#4F4F4F",
        subTitleTop: 60, // draws y coordinates. default is 0

        logo: undefined,
        logoWidth: undefined,
        logoHeight: undefined,
        logoBackgroundColor: '#ffffff',
        logoBackgroundTransparent: false,

        // === Posotion Pattern(Eye) Color
        PO: undefined, // Global Posotion Outer color. if not set, the defaut is `colorDark`
        PI: undefined, // Global Posotion Inner color. if not set, the defaut is `colorDark`
        PO_TL: undefined, // Posotion Outer - Top Left
        PI_TL: undefined, // Posotion Inner - Top Left
        PO_TR: undefined, // Posotion Outer - Top Right
        PI_TR: undefined, // Posotion Inner - Top Right
        PO_BL: undefined, // Posotion Outer - Bottom Left
        PI_BL: undefined, // Posotion Inner - Bottom Left

        // === Alignment Color
        AO: undefined, // Alignment Outer. if not set, the defaut is `colorDark`
        AI: undefined, // Alignment Inner. if not set, the defaut is `colorDark`

        // === Timing Pattern Color
        timing: undefined, // Global Timing color. if not set, the defaut is `colorDark`
        timing_H: undefined, // Horizontal timing color
        timing_V: undefined, // Vertical timing color

        // ==== Backgroud Image
        backgroundImage: undefined, // Background Image
        backgroundImageAlpha: 1, // Background image transparency, value between 0 and 1. default is 1.
        autoColor: false, // Automatic color adjustment(for data block)
        autoColorDark: "rgba(0, 0, 0, .6)", // Automatic color: dark CSS color
        autoColorLight: "rgba(255, 255, 255, .7)", // Automatic: color light CSS color

        // ==== Event Handler
        onRenderingStart: undefined,

        // ==== Images format
        format: 'PNG', // 'PNG', 'JPG'
        compressionLevel: 6, // ZLIB compression level (0-9). default is 6
        quality: 0.75, // An object specifying the quality (0 to 1). default is 0.75. (JPGs only)

        // ==== Versions
        version: 0, // The symbol versions of QR Code range from Version 1 to Version 40. default 0 means automatically choose the closest version based on the text length.

        // ==== binary(hex) data mode
        binary: false // Whether it is binary mode, default is text mode. 
    };
    if (typeof vOption === 'string') {
        vOption = {
            text: vOption
        };
    }

    // Overwrites options
    if (vOption) {
        for (var i in vOption) {
            this._htOption[i] = vOption[i];
        }
    }

    if (this._htOption.version < 0 || this._htOption.version > 40) {
        console.warn("QR Code version '" + this._htOption.version + "' is invalidate, reset to 0")
        this._htOption.version = 0;
    }

    this._htOption.format = this._htOption.format.toUpperCase();
    if (this._htOption.format != 'PNG' && this._htOption.format != 'JPG') {
        console.warn("Image format '" + this._htOption.format + "' is invalidate, reset to 'PNG'")
        this._htOption.format = 'PNG';
    }
    if (this._htOption.format == 'PNG' && (this._htOption.compressionLevel < 0 || this._htOption.compressionLevel > 9)) {
        console.warn(this._htOption.compressionLevel +
            " is invalidate, PNG compressionLevel must between 0 and 9, now reset to 6. ")
        this._htOption.compressionLevel = 1;
    } else if (this._htOption.quality < 0 || this._htOption.quality > 1) {
        console.warn(this._htOption.quality +
            " is invalidate, JPG quality must between 0 and 1, now reset to 0.75. ")
        this._htOption.quality = 0.75;
    }


    if (this._htOption.dotScale < 0 || this._htOption.dotScale > 1) {
        console.warn(this._htOption.dotScale +
            " , is invalidate, dotScale must greater than 0, less than or equal to 1, now reset to 1. ")
        this._htOption.dotScale = 1;
    }

    if (this._htOption.dotScaleTiming < 0 || this._htOption.dotScaleTiming > 1) {
        console.warn(this._htOption.dotScaleTiming +
            " , is invalidate, dotScaleTiming must greater than 0, less than or equal to 1, now reset to 1. "
        )
        this._htOption.dotScaleTiming = 1;
    }
    if (this._htOption.dotScaleTiming_H) {
        if (this._htOption.dotScaleTiming_H < 0 || this._htOption.dotScaleTiming_H > 1) {
            console.warn(this._htOption.dotScaleTiming_H +
                " , is invalidate, dotScaleTiming_H must greater than 0, less than or equal to 1, now reset to 1. "
            )
            this._htOption.dotScaleTiming_H = 1;
        }
    } else {
        this._htOption.dotScaleTiming_H = this._htOption.dotScaleTiming;
    }

    if (this._htOption.dotScaleTiming_V) {
        if (this._htOption.dotScaleTiming_V < 0 || this._htOption.dotScaleTiming_V > 1) {
            console.warn(this._htOption.dotScaleTiming_V +
                " , is invalidate, dotScaleTiming_V must greater than 0, less than or equal to 1, now reset to 1. "
            )
            this._htOption.dotScaleTiming_V = 1;
        }
    } else {
        this._htOption.dotScaleTiming_V = this._htOption.dotScaleTiming;
    }



    if (this._htOption.dotScaleA < 0 || this._htOption.dotScaleA > 1) {
        console.warn(this._htOption.dotScaleA +
            " , is invalidate, dotScaleA must greater than 0, less than or equal to 1, now reset to 1. "
        )
        this._htOption.dotScaleA = 1;
    }
    if (this._htOption.dotScaleAO) {
        if (this._htOption.dotScaleAO < 0 || this._htOption.dotScaleAO > 1) {
            console.warn(this._htOption.dotScaleAO +
                " , is invalidate, dotScaleAO must greater than 0, less than or equal to 1, now reset to 1. "
            )
            this._htOption.dotScaleAO = 1;
        }
    } else {
        this._htOption.dotScaleAO = this._htOption.dotScaleA;
    }
    if (this._htOption.dotScaleAI) {
        if (this._htOption.dotScaleAI < 0 || this._htOption.dotScaleAI > 1) {
            console.warn(this._htOption.dotScaleAI +
                " , is invalidate, dotScaleAI must greater than 0, less than or equal to 1, now reset to 1. "
            )
            this._htOption.dotScaleAI = 1;
        }
    } else {
        this._htOption.dotScaleAI = this._htOption.dotScaleA;
    }



    if (this._htOption.backgroundImageAlpha < 0 || this._htOption.backgroundImageAlpha > 1) {
        console.warn(this._htOption.backgroundImageAlpha +
            " , is invalidate, backgroundImageAlpha must between 0 and 1, now reset to 1. ")
        this._htOption.backgroundImageAlpha = 1;
    }

    if (!this._htOption.drawer || (this._htOption.drawer != 'svg' && this._htOption.drawer != 'canvas')) {
        this._htOption.drawer = 'canvas';
    }

    this._htOption.height = this._htOption.height + this._htOption.titleHeight;

    this._oQRCode = null;
    this._oQRCode = new QRCodeModel(_getTypeNumber(this._htOption.text, this._htOption), this._htOption.correctLevel);
    this._oQRCode.addData(this._htOption.text, this._htOption.binary);
    this._oQRCode.make();
}

// Save to image file or svg file
QRCode.prototype._toSave = function(saveOptions) {
    var _oDrawing = new Drawing(Object.assign({}, this._htOption));
    _oDrawing.makeOptions = saveOptions;

    try {
        var t = this;
        return new Promise((resolve, reject) => {
            _oDrawing.resolve = resolve;
            _oDrawing.reject = reject;
            _oDrawing.draw(t._oQRCode);
        })

    } catch (e) {
        console.error(e)
    }
}

/**
 * Support save PNG image file
 * @param {Object} path Make the QRCode
 */
QRCode.prototype.saveImage = function(saveOptions) {
    var defOptions = {
        makeType: 'FILE',
        path: null
    }
    this._htOption._drawer = 'canvas';
    saveOptions = Object.assign(defOptions, saveOptions);
    return this._toSave(saveOptions);
};

/**
 * Save to SVG file
 */
QRCode.prototype.saveSVG = function(saveOptions) {
    var defOptions = {
        makeType: 'FILE',
        path: null
    }
    this._htOption._drawer = 'svg';
    saveOptions = Object.assign(defOptions, saveOptions);
    return this._toSave(saveOptions);
};

// Get Base64 or SVG text
QRCode.prototype._toData = function(drawer) {
    var defOptions = {
        makeType: 'URL'
    }
    this._htOption._drawer = drawer;

    var _oDrawing = new Drawing(Object.assign({}, this._htOption));
    _oDrawing.makeOptions = defOptions;

    try {
        var t = this;
        return new Promise((resolve, reject) => {
            _oDrawing.resolve = resolve;
            _oDrawing.reject = reject;
            _oDrawing.draw(t._oQRCode);
        })

    } catch (e) {
        console.error(e)
    }
}

/**
 *Get standard base64 image data url text: 'data:image/png;base64, ...' or SVG data text
 */
QRCode.prototype.toDataURL = function() {
    return this._toData('canvas');
};
/**
 * Get SVG data text: '<svg xmlns:xlink="http://www.w3.org/1999/xlink" ...'
 */
QRCode.prototype.toSVGText = function() {
    return this._toData('svg');
};


/**
 * @name QRCode.CorrectLevel
 */
QRCode.CorrectLevel = QRErrorCorrectLevel;

module.exports = QRCode;