# cocos2 本地根据文本内容生成二维码

cocos2 本地根据文本内容生成二维码

之前做了一个功能，就是cocos2小游戏，结算页面需要有一个二维码，二维码内容是一个网址，这个网址需要根据用户游玩分数确定访问哪个网址，但是这个小游戏是单机小游戏，不连接网络，所以只能通过本地生成二维码展示。

需求

cocos2 本地，将文本内容生成二维码展示在页面。

思路

展示二维码的方式就使用单色节点就可以，直接拖入UI中设置大小位置即可。主要的工作其实是将文本转换成二维码图片，然后把内容赋值给这个单色节点就可以。

实现

创建一个单色节点

创建单色节点很简单，鼠标点几下就出来了，然后稍微设置一下大小和位置就可以啦！

文本转二维码

文本转二维码的话需要一个js文件来支持。

我把这个文件的完整代码贴到这篇博文的最后，就不上传到资源里面去了，免的下载的话还得要C币。

使用JS文件

搞到这个文件之后嘞，很简单，放到项目里面去就可以了，比如下面的图和我一样，当然我是演示了，随便放了，到时候你们根据实际项目结构去放，别放的乱糟糟的。

放进去之后就可以用了，怎么用呢，超级简单，直接拖到刚才创建的单色节点就可以啦！但是需要注意一下哈！就是我们拖拽单色节点的时候，默认会有个Sprite，我们用不到，通过右边的小齿轮删掉他哈！

删掉之后，我们在添加那个JS文件，不然的话会提示我们有一个Sprite了。

删掉自带的，再添加就不会有问题了。

JS 文件一拖上来就发现，原本的单色节点上展示出了二维码！

截图我标注了，其实这个String 就是二维码的文本。修改文本，二维码会随之变化。这样就实现了我们本地将文本内容转化成二维码的功能。

并且微信扫码也可以正常显示内容

好了，完成了！！

CQRCode.js 完整代码

这个代码是我网上找了好久找到的，里面信息我都没有删改过，希望对需要的人有用。

//---------------------------------------------------------------------
// QRCode for JavaScript
//
// Copyright (c) 2009 Kazuhiko Arase
//
// URL: http://www.d-project.com/
//
// Licensed under the MIT license:
//   http://www.opensource.org/licenses/mit-license.php
//
// The word "QR Code" is registered trademark of 
// DENSO WAVE INCORPORATED
//   http://www.denso-wave.com/qrcode/faqpatent-e.html
//
//---------------------------------------------------------------------

//---------------------------------------------------------------------
// QR8bitByte
//---------------------------------------------------------------------

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 (let i = 0; i < this.data.length; i++) {
            // not JIS ...
            buffer.put(this.data.charCodeAt(i), 8);
        }
    }
};

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

let QRCode = function (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) {
        let 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) {
            let typeNumber = 1;
            for (typeNumber = 1; typeNumber < 40; typeNumber++) {
                let rsBlocks = QRRSBlock.getRSBlocks(typeNumber, this.errorCorrectLevel);

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

                for (let i = 0; i < this.dataList.length; i++) {
                    let 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 (let row = 0; row < this.moduleCount; row++) {

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

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

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

            for (let 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 () {

        let minLostPoint = 0;
        let pattern = 0;

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

            this.makeImpl(true, i);

            let lostPoint = QRUtil.getLostPoint(this);

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

        return pattern;
    },

    createMovieClip: function (target_mc, instance_name, depth) {

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

        this.make();

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

            let y = row * cs;

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

                let x = col * cs;
                let 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 (let r = 8; r < this.moduleCount - 8; r++) {
            if (this.modules[r][6] != null) {
                continue;
            }
            this.modules[r][6] = (r % 2 == 0);
        }

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

    setupPositionAdjustPattern: function () {

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

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

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

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

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

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

                    for (let 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) {

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

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

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

    setupTypeInfo: function (test, maskPattern) {

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

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

            let 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 (let i = 0; i < 15; i++) {

            let 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) {

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

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

            if (col == 6) col--;

            while (true) {

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

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

                        let dark = false;

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

                        let 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) {

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

    let buffer = new QRBitBuffer();

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

    // calc num max data.
    let totalDataCount = 0;
    for (let 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) {

    let offset = 0;

    let maxDcCount = 0;
    let maxEcCount = 0;

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

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

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

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

        dcdata[r] = new Array(dcCount);

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

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

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

    }

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

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

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

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

    return data;

}

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

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

//---------------------------------------------------------------------
// QRErrorCorrectLevel
//---------------------------------------------------------------------

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

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

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

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

let 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) {
        let 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) {
        let 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) {

        let 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) {

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

        for (let 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) {

        let moduleCount = qrCode.getModuleCount();

        let lostPoint = 0;

        // LEVEL1

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

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

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

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

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

                    for (let 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 (let row = 0; row < moduleCount - 1; row++) {
            for (let col = 0; col < moduleCount - 1; col++) {
                let 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 (let row = 0; row < moduleCount; row++) {
            for (let 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 (let col = 0; col < moduleCount; col++) {
            for (let 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

        let darkCount = 0;

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

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

        return lostPoint;
    }

};


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

let 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 (let i = 0; i < 8; i++) {
    QRMath.EXP_TABLE[i] = 1 << i;
}
for (let 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 (let 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);
    }

    let offset = 0;

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

    this.num = new Array(num.length - offset + shift);
    for (let 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) {

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

        for (let i = 0; i < this.getLength(); i++) {
            for (let 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;
        }

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

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

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

        for (let 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) {

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

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

    let length = rsBlock.length / 3;

    let list = new Array();

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

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

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

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

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

    putBit: function (bit) {

        let 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++;
    }
};

/**
 * 二维码组件
 */
let CQRCode = cc.Class({
    extends: cc.Graphics,
    properties: {
        string: {
            default: 'Hello World!',
            notify(oldValue) {
                if (this.string === oldValue) {
                    return;
                }
                this.setContent();
            },
        },

        backColor: {
            type: cc.Color,
            default: cc.Color.WHITE,
            notify() {
                this.setContent();
            },
        },

        foreColor: {
            type: cc.Color,
            default: cc.Color.BLACK,
            notify(old) {
                this.node.color = this.foreColor;
                this.setContent();
            },
        },

        margin: {
            type: cc.Float,
            default: 10,
            notify(old) {
                if (old === this.margin) {
                    return;
                }
                this.setContent();
            }
        },

        _size: 200,
        size: {
            type: cc.Float,
            get() {
                return this._size;
            },

            set(value) {
                if (this._size === value) {
                    return;
                }
                
                this.node.setContentSize(value, value);
                this.setContent();
                this._size = value;
            },
        }
    },

    onLoad() {
        this.node.setContentSize(this._size, this._size);
        this.setContent();
    },

    setContent() {
        this.clear();
        //背景色
        this.fillColor = this.backColor;
        let width = this.node.width;
        let offsetX = -width * this.node.anchorX;
        let offsetY = -width * this.node.anchorY;
        this.rect(offsetX, offsetY, width, width);
        this.fill();
        this.close();
        //生成二维码数据
        let qrcode = new QRCode(-1, 2);
        qrcode.addData(this.string);
        qrcode.make();
        this.fillColor = this.foreColor;
        let size = width - this.margin * 2;
        let num = qrcode.getModuleCount();
        
        let tileW = size / num;
        let tileH = size / num;
        let w = Math.ceil(tileW);
        let h = Math.ceil(tileH);
        for (let row = 0; row < num; row++) {
            for (let col = 0; col < num; col++) {
                if (qrcode.isDark(row, col)) {
                    this.rect(offsetX + this.margin + col * tileW, offsetX + size - tileH - Math.round(row * tileH) + this.margin, w, h);
                    this.fill();
                }
            }
        }
    },

    
});

cc.Class.Attr.setClassAttr(CQRCode, 'lineWidth', 'visible', false);
cc.Class.Attr.setClassAttr(CQRCode, 'lineJoin', 'visible', false);
cc.Class.Attr.setClassAttr(CQRCode, 'lineCap', 'visible', false);
cc.Class.Attr.setClassAttr(CQRCode, 'strokeColor', 'visible', false);
cc.Class.Attr.setClassAttr(CQRCode, 'miterLimit', 'visible', false);
cc.Class.Attr.setClassAttr(CQRCode, 'fillColor', 'visible', false);

module.exports = CQRCode;