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1201 lines
41 KiB
1201 lines
41 KiB
let QRCode = {}; |
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(function () { |
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/** |
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* 获取单个字符的utf8编码 |
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* unicode BMP平面约65535个字符 |
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* @param {num} code |
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* return {array} |
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*/ |
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function unicodeFormat8(code) { |
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// 1 byte |
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var c0, c1, c2; |
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if (code < 128) { |
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return [code]; |
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// 2 bytes |
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} else if (code < 2048) { |
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c0 = 192 + (code >> 6); |
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c1 = 128 + (code & 63); |
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return [c0, c1]; |
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// 3 bytes |
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} else { |
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c0 = 224 + (code >> 12); |
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c1 = 128 + (code >> 6 & 63); |
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c2 = 128 + (code & 63); |
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return [c0, c1, c2]; |
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} |
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} |
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/** |
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* 获取字符串的utf8编码字节串 |
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* @param {string} string |
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* @return {array} |
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*/ |
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function getUTF8Bytes(string) { |
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var utf8codes = []; |
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for (var i = 0; i < string.length; i++) { |
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var code = string.charCodeAt(i); |
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var utf8 = unicodeFormat8(code); |
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for (var j = 0; j < utf8.length; j++) { |
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utf8codes.push(utf8[j]); |
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} |
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} |
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return utf8codes; |
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} |
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/** |
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* 二维码算法实现 |
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* @param {string} data 要编码的信息字符串 |
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* @param {num} errorCorrectLevel 纠错等级 |
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*/ |
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function QRCodeAlg(data, errorCorrectLevel) { |
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this.typeNumber = -1; //版本 |
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this.errorCorrectLevel = errorCorrectLevel; |
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this.modules = null; //二维矩阵，存放最终结果 |
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this.moduleCount = 0; //矩阵大小 |
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this.dataCache = null; //数据缓存 |
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this.rsBlocks = null; //版本数据信息 |
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this.totalDataCount = -1; //可使用的数据量 |
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this.data = data; |
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this.utf8bytes = getUTF8Bytes(data); |
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this.make(); |
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} |
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QRCodeAlg.prototype = { |
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constructor: QRCodeAlg, |
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/** |
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* 获取二维码矩阵大小 |
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* @return {num} 矩阵大小 |
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*/ |
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getModuleCount: function () { |
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return this.moduleCount; |
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}, |
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/** |
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* 编码 |
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*/ |
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make: function () { |
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this.getRightType(); |
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this.dataCache = this.createData(); |
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this.createQrcode(); |
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}, |
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/** |
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* 设置二位矩阵功能图形 |
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* @param {bool} test 表示是否在寻找最好掩膜阶段 |
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* @param {num} maskPattern 掩膜的版本 |
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*/ |
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makeImpl: function (maskPattern) { |
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this.moduleCount = this.typeNumber * 4 + 17; |
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this.modules = new Array(this.moduleCount); |
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for (var row = 0; row < this.moduleCount; row++) { |
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this.modules[row] = new Array(this.moduleCount); |
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} |
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this.setupPositionProbePattern(0, 0); |
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this.setupPositionProbePattern(this.moduleCount - 7, 0); |
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this.setupPositionProbePattern(0, this.moduleCount - 7); |
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this.setupPositionAdjustPattern(); |
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this.setupTimingPattern(); |
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this.setupTypeInfo(true, maskPattern); |
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if (this.typeNumber >= 7) { |
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this.setupTypeNumber(true); |
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} |
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this.mapData(this.dataCache, maskPattern); |
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}, |
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/** |
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* 设置二维码的位置探测图形 |
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* @param {num} row 探测图形的中心横坐标 |
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* @param {num} col 探测图形的中心纵坐标 |
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*/ |
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setupPositionProbePattern: function (row, col) { |
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for (var r = -1; r <= 7; r++) { |
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if (row + r <= -1 || this.moduleCount <= row + r) continue; |
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for (var c = -1; c <= 7; c++) { |
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if (col + c <= -1 || this.moduleCount <= col + c) continue; |
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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)) { |
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this.modules[row + r][col + c] = true; |
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} else { |
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this.modules[row + r][col + c] = false; |
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} |
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} |
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} |
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}, |
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/** |
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* 创建二维码 |
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* @return {[type]} [description] |
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*/ |
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createQrcode: function () { |
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var minLostPoint = 0; |
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var pattern = 0; |
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var bestModules = null; |
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for (var i = 0; i < 8; i++) { |
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this.makeImpl(i); |
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var lostPoint = QRUtil.getLostPoint(this); |
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if (i == 0 || minLostPoint > lostPoint) { |
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minLostPoint = lostPoint; |
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pattern = i; |
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bestModules = this.modules; |
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} |
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} |
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this.modules = bestModules; |
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this.setupTypeInfo(false, pattern); |
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if (this.typeNumber >= 7) { |
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this.setupTypeNumber(false); |
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} |
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}, |
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/** |
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* 设置定位图形 |
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* @return {[type]} [description] |
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*/ |
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setupTimingPattern: function () { |
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for (var r = 8; r < this.moduleCount - 8; r++) { |
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if (this.modules[r][6] != null) { |
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continue; |
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} |
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this.modules[r][6] = (r % 2 == 0); |
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if (this.modules[6][r] != null) { |
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continue; |
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} |
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this.modules[6][r] = (r % 2 == 0); |
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} |
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}, |
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/** |
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* 设置矫正图形 |
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* @return {[type]} [description] |
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*/ |
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setupPositionAdjustPattern: function () { |
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var pos = QRUtil.getPatternPosition(this.typeNumber); |
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for (var i = 0; i < pos.length; i++) { |
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for (var j = 0; j < pos.length; j++) { |
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var row = pos[i]; |
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var col = pos[j]; |
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if (this.modules[row][col] != null) { |
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continue; |
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} |
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for (var r = -2; r <= 2; r++) { |
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for (var c = -2; c <= 2; c++) { |
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if (r == -2 || r == 2 || c == -2 || c == 2 || (r == 0 && c == 0)) { |
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this.modules[row + r][col + c] = true; |
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} else { |
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this.modules[row + r][col + c] = false; |
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} |
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} |
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} |
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} |
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} |
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}, |
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/** |
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* 设置版本信息（7以上版本才有） |
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* @param {bool} test 是否处于判断最佳掩膜阶段 |
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* @return {[type]} [description] |
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*/ |
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setupTypeNumber: function (test) { |
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var bits = QRUtil.getBCHTypeNumber(this.typeNumber); |
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for (var i = 0; i < 18; i++) { |
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var mod = (!test && ((bits >> i) & 1) == 1); |
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this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod; |
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this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod; |
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} |
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}, |
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/** |
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* 设置格式信息（纠错等级和掩膜版本） |
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* @param {bool} test |
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* @param {num} maskPattern 掩膜版本 |
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* @return {} |
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*/ |
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setupTypeInfo: function (test, maskPattern) { |
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var data = (QRErrorCorrectLevel[this.errorCorrectLevel] << 3) | maskPattern; |
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var bits = QRUtil.getBCHTypeInfo(data); |
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// vertical |
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for (var i = 0; i < 15; i++) { |
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var mod = (!test && ((bits >> i) & 1) == 1); |
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if (i < 6) { |
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this.modules[i][8] = mod; |
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} else if (i < 8) { |
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this.modules[i + 1][8] = mod; |
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} else { |
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this.modules[this.moduleCount - 15 + i][8] = mod; |
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} |
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// horizontal |
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var mod = (!test && ((bits >> i) & 1) == 1); |
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if (i < 8) { |
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this.modules[8][this.moduleCount - i - 1] = mod; |
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} else if (i < 9) { |
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this.modules[8][15 - i - 1 + 1] = mod; |
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} else { |
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this.modules[8][15 - i - 1] = mod; |
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} |
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} |
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// fixed module |
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this.modules[this.moduleCount - 8][8] = (!test); |
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}, |
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/** |
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* 数据编码 |
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* @return {[type]} [description] |
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*/ |
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createData: function () { |
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var buffer = new QRBitBuffer(); |
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var lengthBits = this.typeNumber > 9 ? 16 : 8; |
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buffer.put(4, 4); //添加模式 |
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buffer.put(this.utf8bytes.length, lengthBits); |
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for (var i = 0, l = this.utf8bytes.length; i < l; i++) { |
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buffer.put(this.utf8bytes[i], 8); |
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} |
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if (buffer.length + 4 <= this.totalDataCount * 8) { |
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buffer.put(0, 4); |
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} |
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// padding |
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while (buffer.length % 8 != 0) { |
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buffer.putBit(false); |
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} |
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// padding |
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while (true) { |
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if (buffer.length >= this.totalDataCount * 8) { |
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break; |
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} |
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buffer.put(QRCodeAlg.PAD0, 8); |
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if (buffer.length >= this.totalDataCount * 8) { |
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break; |
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} |
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buffer.put(QRCodeAlg.PAD1, 8); |
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} |
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return this.createBytes(buffer); |
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}, |
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/** |
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* 纠错码编码 |
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* @param {buffer} buffer 数据编码 |
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* @return {[type]} |
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*/ |
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createBytes: function (buffer) { |
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var offset = 0; |
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var maxDcCount = 0; |
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var maxEcCount = 0; |
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var length = this.rsBlock.length / 3; |
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var rsBlocks = new Array(); |
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for (var i = 0; i < length; i++) { |
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var count = this.rsBlock[i * 3 + 0]; |
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var totalCount = this.rsBlock[i * 3 + 1]; |
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var dataCount = this.rsBlock[i * 3 + 2]; |
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for (var j = 0; j < count; j++) { |
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rsBlocks.push([dataCount, totalCount]); |
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} |
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} |
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var dcdata = new Array(rsBlocks.length); |
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var ecdata = new Array(rsBlocks.length); |
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for (var r = 0; r < rsBlocks.length; r++) { |
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var dcCount = rsBlocks[r][0]; |
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var ecCount = rsBlocks[r][1] - dcCount; |
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maxDcCount = Math.max(maxDcCount, dcCount); |
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maxEcCount = Math.max(maxEcCount, ecCount); |
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dcdata[r] = new Array(dcCount); |
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for (var i = 0; i < dcdata[r].length; i++) { |
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dcdata[r][i] = 0xff & buffer.buffer[i + offset]; |
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} |
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offset += dcCount; |
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var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount); |
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var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1); |
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var modPoly = rawPoly.mod(rsPoly); |
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ecdata[r] = new Array(rsPoly.getLength() - 1); |
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for (var i = 0; i < ecdata[r].length; i++) { |
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var modIndex = i + modPoly.getLength() - ecdata[r].length; |
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ecdata[r][i] = (modIndex >= 0) ? modPoly.get(modIndex) : 0; |
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} |
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} |
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var data = new Array(this.totalDataCount); |
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var index = 0; |
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for (var i = 0; i < maxDcCount; i++) { |
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for (var r = 0; r < rsBlocks.length; r++) { |
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if (i < dcdata[r].length) { |
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data[index++] = dcdata[r][i]; |
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} |
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} |
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} |
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for (var i = 0; i < maxEcCount; i++) { |
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for (var r = 0; r < rsBlocks.length; r++) { |
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if (i < ecdata[r].length) { |
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data[index++] = ecdata[r][i]; |
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} |
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} |
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} |
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return data; |
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|
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}, |
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/** |
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* 布置模块，构建最终信息 |
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* @param {} data |
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* @param {} maskPattern |
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* @return {} |
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*/ |
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mapData: function (data, maskPattern) { |
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var inc = -1; |
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var row = this.moduleCount - 1; |
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var bitIndex = 7; |
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var byteIndex = 0; |
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for (var col = this.moduleCount - 1; col > 0; col -= 2) { |
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if (col == 6) col--; |
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while (true) { |
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for (var c = 0; c < 2; c++) { |
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if (this.modules[row][col - c] == null) { |
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var dark = false; |
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if (byteIndex < data.length) { |
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dark = (((data[byteIndex] >>> bitIndex) & 1) == 1); |
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} |
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var mask = QRUtil.getMask(maskPattern, row, col - c); |
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if (mask) { |
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dark = !dark; |
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} |
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this.modules[row][col - c] = dark; |
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bitIndex--; |
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if (bitIndex == -1) { |
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byteIndex++; |
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bitIndex = 7; |
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} |
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} |
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} |
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row += inc; |
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if (row < 0 || this.moduleCount <= row) { |
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row -= inc; |
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inc = -inc; |
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break; |
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} |
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} |
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} |
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} |
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}; |
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/** |
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* 填充字段 |
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*/ |
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QRCodeAlg.PAD0 = 0xEC; |
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QRCodeAlg.PAD1 = 0x11; |
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//--------------------------------------------------------------------- |
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// 纠错等级对应的编码 |
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//--------------------------------------------------------------------- |
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var QRErrorCorrectLevel = [1, 0, 3, 2]; |
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//--------------------------------------------------------------------- |
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// 掩膜版本 |
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//--------------------------------------------------------------------- |
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var QRMaskPattern = { |
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PATTERN000: 0, |
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PATTERN001: 1, |
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PATTERN010: 2, |
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PATTERN011: 3, |
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PATTERN100: 4, |
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PATTERN101: 5, |
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PATTERN110: 6, |
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PATTERN111: 7 |
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}; |
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//--------------------------------------------------------------------- |
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// 工具类 |
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//--------------------------------------------------------------------- |
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var QRUtil = { |
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/* |
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每个版本矫正图形的位置 |
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*/ |
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PATTERN_POSITION_TABLE: [ |
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[], |
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[6, 18], |
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[6, 22], |
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[6, 26], |
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[6, 30], |
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[6, 34], |
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[6, 22, 38], |
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[6, 24, 42], |
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[6, 26, 46], |
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[6, 28, 50], |
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[6, 30, 54], |
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[6, 32, 58], |
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[6, 34, 62], |
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[6, 26, 46, 66], |
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[6, 26, 48, 70], |
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[6, 26, 50, 74], |
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[6, 30, 54, 78], |
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[6, 30, 56, 82], |
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[6, 30, 58, 86], |
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[6, 34, 62, 90], |
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[6, 28, 50, 72, 94], |
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[6, 26, 50, 74, 98], |
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[6, 30, 54, 78, 102], |
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[6, 28, 54, 80, 106], |
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[6, 32, 58, 84, 110], |
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[6, 30, 58, 86, 114], |
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[6, 34, 62, 90, 118], |
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[6, 26, 50, 74, 98, 122], |
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[6, 30, 54, 78, 102, 126], |
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[6, 26, 52, 78, 104, 130], |
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[6, 30, 56, 82, 108, 134], |
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[6, 34, 60, 86, 112, 138], |
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[6, 30, 58, 86, 114, 142], |
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[6, 34, 62, 90, 118, 146], |
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[6, 30, 54, 78, 102, 126, 150], |
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[6, 24, 50, 76, 102, 128, 154], |
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[6, 28, 54, 80, 106, 132, 158], |
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[6, 32, 58, 84, 110, 136, 162], |
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[6, 26, 54, 82, 110, 138, 166], |
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[6, 30, 58, 86, 114, 142, 170] |
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], |
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G15: (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0), |
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G18: (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0), |
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G15_MASK: (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1), |
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/* |
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BCH编码格式信息 |
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*/ |
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getBCHTypeInfo: function (data) { |
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var d = data << 10; |
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while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) { |
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d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15))); |
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} |
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return ((data << 10) | d) ^ QRUtil.G15_MASK; |
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}, |
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/* |
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BCH编码版本信息 |
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*/ |
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getBCHTypeNumber: function (data) { |
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var d = data << 12; |
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while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) { |
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d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18))); |
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} |
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return (data << 12) | d; |
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}, |
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/* |
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获取BCH位信息 |
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*/ |
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getBCHDigit: function (data) { |
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var digit = 0; |
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while (data != 0) { |
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digit++; |
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data >>>= 1; |
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} |
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return digit; |
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}, |
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/* |
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获取版本对应的矫正图形位置 |
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*/ |
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getPatternPosition: function (typeNumber) { |
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return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1]; |
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}, |
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/* |
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掩膜算法 |
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*/ |
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getMask: function (maskPattern, i, j) { |
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switch (maskPattern) { |
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case QRMaskPattern.PATTERN000: |
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return (i + j) % 2 == 0; |
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case QRMaskPattern.PATTERN001: |
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return i % 2 == 0; |
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case QRMaskPattern.PATTERN010: |
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return j % 3 == 0; |
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case QRMaskPattern.PATTERN011: |
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return (i + j) % 3 == 0; |
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case QRMaskPattern.PATTERN100: |
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return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0; |
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case QRMaskPattern.PATTERN101: |
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return (i * j) % 2 + (i * j) % 3 == 0; |
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case QRMaskPattern.PATTERN110: |
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return ((i * j) % 2 + (i * j) % 3) % 2 == 0; |
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case QRMaskPattern.PATTERN111: |
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return ((i * j) % 3 + (i + j) % 2) % 2 == 0; |
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default: |
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throw new Error("bad maskPattern:" + maskPattern); |
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} |
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}, |
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/* |
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获取RS的纠错多项式 |
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*/ |
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getErrorCorrectPolynomial: function (errorCorrectLength) { |
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var a = new QRPolynomial([1], 0); |
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for (var i = 0; i < errorCorrectLength; i++) { |
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a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0)); |
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} |
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return a; |
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}, |
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/* |
|
获取评价 |
|
*/ |
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getLostPoint: function (qrCode) { |
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var moduleCount = qrCode.getModuleCount(), |
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lostPoint = 0, |
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darkCount = 0; |
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for (var row = 0; row < moduleCount; row++) { |
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var sameCount = 0; |
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var head = qrCode.modules[row][0]; |
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for (var col = 0; col < moduleCount; col++) { |
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var current = qrCode.modules[row][col]; |
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//level 3 评价 |
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if (col < moduleCount - 6) { |
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if (current && !qrCode.modules[row][col + 1] && qrCode.modules[row][col + 2] && qrCode.modules[row][col + 3] && qrCode.modules[row][col + 4] && !qrCode.modules[row][col + 5] && qrCode.modules[row][col + 6]) { |
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if (col < moduleCount - 10) { |
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if (qrCode.modules[row][col + 7] && qrCode.modules[row][col + 8] && qrCode.modules[row][col + 9] && qrCode.modules[row][col + 10]) { |
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lostPoint += 40; |
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} |
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} else if (col > 3) { |
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if (qrCode.modules[row][col - 1] && qrCode.modules[row][col - 2] && qrCode.modules[row][col - 3] && qrCode.modules[row][col - 4]) { |
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lostPoint += 40; |
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} |
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} |
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} |
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} |
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//level 2 评价 |
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if ((row < moduleCount - 1) && (col < moduleCount - 1)) { |
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var count = 0; |
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if (current) count++; |
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if (qrCode.modules[row + 1][col]) count++; |
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if (qrCode.modules[row][col + 1]) count++; |
|
if (qrCode.modules[row + 1][col + 1]) count++; |
|
if (count == 0 || count == 4) { |
|
lostPoint += 3; |
|
} |
|
} |
|
//level 1 评价 |
|
if (head ^ current) { |
|
sameCount++; |
|
} else { |
|
head = current; |
|
if (sameCount >= 5) { |
|
lostPoint += (3 + sameCount - 5); |
|
} |
|
sameCount = 1; |
|
} |
|
//level 4 评价 |
|
if (current) { |
|
darkCount++; |
|
} |
|
} |
|
} |
|
for (var col = 0; col < moduleCount; col++) { |
|
var sameCount = 0; |
|
var head = qrCode.modules[0][col]; |
|
for (var row = 0; row < moduleCount; row++) { |
|
var current = qrCode.modules[row][col]; |
|
//level 3 评价 |
|
if (row < moduleCount - 6) { |
|
if (current && !qrCode.modules[row + 1][col] && qrCode.modules[row + 2][col] && qrCode.modules[row + 3][col] && qrCode.modules[row + 4][col] && !qrCode.modules[row + 5][col] && qrCode.modules[row + 6][col]) { |
|
if (row < moduleCount - 10) { |
|
if (qrCode.modules[row + 7][col] && qrCode.modules[row + 8][col] && qrCode.modules[row + 9][col] && qrCode.modules[row + 10][col]) { |
|
lostPoint += 40; |
|
} |
|
} else if (row > 3) { |
|
if (qrCode.modules[row - 1][col] && qrCode.modules[row - 2][col] && qrCode.modules[row - 3][col] && qrCode.modules[row - 4][col]) { |
|
lostPoint += 40; |
|
} |
|
} |
|
} |
|
} |
|
//level 1 评价 |
|
if (head ^ current) { |
|
sameCount++; |
|
} else { |
|
head = current; |
|
if (sameCount >= 5) { |
|
lostPoint += (3 + sameCount - 5); |
|
} |
|
sameCount = 1; |
|
} |
|
} |
|
} |
|
// LEVEL4 |
|
var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5; |
|
lostPoint += ratio * 10; |
|
return lostPoint; |
|
} |
|
|
|
}; |
|
//--------------------------------------------------------------------- |
|
// QRMath使用的数学工具 |
|
//--------------------------------------------------------------------- |
|
var QRMath = { |
|
/* |
|
将n转化为a^m |
|
*/ |
|
glog: function (n) { |
|
if (n < 1) { |
|
throw new Error("glog(" + n + ")"); |
|
} |
|
return QRMath.LOG_TABLE[n]; |
|
}, |
|
/* |
|
将a^m转化为n |
|
*/ |
|
gexp: function (n) { |
|
while (n < 0) { |
|
n += 255; |
|
} |
|
while (n >= 256) { |
|
n -= 255; |
|
} |
|
return QRMath.EXP_TABLE[n]; |
|
}, |
|
EXP_TABLE: new Array(256), |
|
LOG_TABLE: new Array(256) |
|
|
|
}; |
|
for (var i = 0; i < 8; i++) { |
|
QRMath.EXP_TABLE[i] = 1 << i; |
|
} |
|
for (var i = 8; i < 256; i++) { |
|
QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] ^ QRMath.EXP_TABLE[i - 5] ^ QRMath.EXP_TABLE[i - 6] ^ QRMath.EXP_TABLE[i - 8]; |
|
} |
|
for (var i = 0; i < 255; i++) { |
|
QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i; |
|
} |
|
//--------------------------------------------------------------------- |
|
// QRPolynomial 多项式 |
|
//--------------------------------------------------------------------- |
|
/** |
|
* 多项式类 |
|
* @param {Array} num 系数 |
|
* @param {num} shift a^shift |
|
*/ |
|
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; |
|
}, |
|
/** |
|
* 多项式乘法 |
|
* @param {QRPolynomial} e 被乘多项式 |
|
* @return {[type]} [description] |
|
*/ |
|
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); |
|
}, |
|
/** |
|
* 多项式模运算 |
|
* @param {QRPolynomial} e 模多项式 |
|
* @return {} |
|
*/ |
|
mod: function (e) { |
|
var tl = this.getLength(), |
|
el = e.getLength(); |
|
if (tl - el < 0) { |
|
return this; |
|
} |
|
var num = new Array(tl); |
|
for (var i = 0; i < tl; i++) { |
|
num[i] = this.get(i); |
|
} |
|
while (num.length >= el) { |
|
var ratio = QRMath.glog(num[0]) - QRMath.glog(e.get(0)); |
|
|
|
for (var i = 0; i < e.getLength(); i++) { |
|
num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio); |
|
} |
|
while (num[0] == 0) { |
|
num.shift(); |
|
} |
|
} |
|
return new QRPolynomial(num, 0); |
|
} |
|
}; |
|
|
|
//--------------------------------------------------------------------- |
|
// RS_BLOCK_TABLE |
|
//--------------------------------------------------------------------- |
|
/* |
|
二维码各个版本信息[块数, 每块中的数据块数, 每块中的信息块数] |
|
*/ |
|
var 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] |
|
]; |
|
|
|
/** |
|
* 根据数据获取对应版本 |
|
* @return {[type]} [description] |
|
*/ |
|
QRCodeAlg.prototype.getRightType = function () { |
|
for (var typeNumber = 1; typeNumber < 41; typeNumber++) { |
|
var rsBlock = RS_BLOCK_TABLE[(typeNumber - 1) * 4 + this.errorCorrectLevel]; |
|
if (rsBlock == undefined) { |
|
throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + this.errorCorrectLevel); |
|
} |
|
var length = rsBlock.length / 3; |
|
var totalDataCount = 0; |
|
for (var i = 0; i < length; i++) { |
|
var count = rsBlock[i * 3 + 0]; |
|
var dataCount = rsBlock[i * 3 + 2]; |
|
totalDataCount += dataCount * count; |
|
} |
|
var lengthBytes = typeNumber > 9 ? 2 : 1; |
|
if (this.utf8bytes.length + lengthBytes < totalDataCount || typeNumber == 40) { |
|
this.typeNumber = typeNumber; |
|
this.rsBlock = rsBlock; |
|
this.totalDataCount = totalDataCount; |
|
break; |
|
} |
|
} |
|
}; |
|
|
|
//--------------------------------------------------------------------- |
|
// QRBitBuffer |
|
//--------------------------------------------------------------------- |
|
function QRBitBuffer() { |
|
this.buffer = new Array(); |
|
this.length = 0; |
|
} |
|
QRBitBuffer.prototype = { |
|
get: function (index) { |
|
var bufIndex = Math.floor(index / 8); |
|
return ((this.buffer[bufIndex] >>> (7 - index % 8)) & 1); |
|
}, |
|
put: function (num, length) { |
|
for (var i = 0; i < length; i++) { |
|
this.putBit(((num >>> (length - i - 1)) & 1)); |
|
} |
|
}, |
|
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++; |
|
} |
|
}; |
|
|
|
|
|
|
|
// xzedit |
|
let qrcodeAlgObjCache = []; |
|
/** |
|
* 二维码构造函数，主要用于绘制 |
|
* @param {参数列表} opt 传递参数 |
|
* @return {} |
|
*/ |
|
QRCode = function (opt) { |
|
//设置默认参数 |
|
this.options = { |
|
text: '', |
|
size: 256, |
|
correctLevel: 3, |
|
background: '#ffffff', |
|
foreground: '#000000', |
|
pdground: '#000000', |
|
image: '', |
|
imageSize: 30, |
|
canvasId: opt.canvasId, |
|
context: opt.context, |
|
usingComponents: opt.usingComponents, |
|
showLoading: opt.showLoading, |
|
loadingText: opt.loadingText, |
|
}; |
|
if (typeof opt === 'string') { // 只编码ASCII字符串 |
|
opt = { |
|
text: opt |
|
}; |
|
} |
|
if (opt) { |
|
for (var i in opt) { |
|
this.options[i] = opt[i]; |
|
} |
|
} |
|
//使用QRCodeAlg创建二维码结构 |
|
var qrCodeAlg = null; |
|
for (var i = 0, l = qrcodeAlgObjCache.length; i < l; i++) { |
|
if (qrcodeAlgObjCache[i].text == this.options.text && qrcodeAlgObjCache[i].text.correctLevel == this.options.correctLevel) { |
|
qrCodeAlg = qrcodeAlgObjCache[i].obj; |
|
break; |
|
} |
|
} |
|
if (i == l) { |
|
qrCodeAlg = new QRCodeAlg(this.options.text, this.options.correctLevel); |
|
qrcodeAlgObjCache.push({ |
|
text: this.options.text, |
|
correctLevel: this.options.correctLevel, |
|
obj: qrCodeAlg |
|
}); |
|
} |
|
/** |
|
* 计算矩阵点的前景色 |
|
* @param {Obj} config |
|
* @param {Number} config.row 点x坐标 |
|
* @param {Number} config.col 点y坐标 |
|
* @param {Number} config.count 矩阵大小 |
|
* @param {Number} config.options 组件的options |
|
* @return {String} |
|
*/ |
|
let getForeGround = function (config) { |
|
var options = config.options; |
|
if (options.pdground && ( |
|
(config.row > 1 && config.row < 5 && config.col > 1 && config.col < 5) || |
|
(config.row > (config.count - 6) && config.row < (config.count - 2) && config.col > 1 && config.col < 5) || |
|
(config.row > 1 && config.row < 5 && config.col > (config.count - 6) && config.col < (config.count - 2)) |
|
)) { |
|
return options.pdground; |
|
} |
|
return options.foreground; |
|
} |
|
// 创建canvas |
|
let createCanvas = function (options) { |
|
if (options.showLoading) { |
|
uni.showLoading({ |
|
title: options.loadingText, |
|
mask: true |
|
}); |
|
} |
|
var ctx = uni.createCanvasContext(options.canvasId, options.context); |
|
var count = qrCodeAlg.getModuleCount(); |
|
var ratioSize = options.size; |
|
var ratioImgSize = options.imageSize; |
|
//计算每个点的长宽 |
|
var tileW = (ratioSize / count).toPrecision(4); |
|
var tileH = (ratioSize / count).toPrecision(4); |
|
//绘制 |
|
for (var row = 0; row < count; row++) { |
|
for (var col = 0; col < count; col++) { |
|
var w = (Math.ceil((col + 1) * tileW) - Math.floor(col * tileW)); |
|
var h = (Math.ceil((row + 1) * tileW) - Math.floor(row * tileW)); |
|
var foreground = getForeGround({ |
|
row: row, |
|
col: col, |
|
count: count, |
|
options: options |
|
}); |
|
ctx.setFillStyle(qrCodeAlg.modules[row][col] ? foreground : options.background); |
|
ctx.fillRect(Math.round(col * tileW), Math.round(row * tileH), w, h); |
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} |
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} |
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if (options.image) { |
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var x = Number(((ratioSize - ratioImgSize) / 2).toFixed(2)); |
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var y = Number(((ratioSize - ratioImgSize) / 2).toFixed(2)); |
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drawRoundedRect(ctx, x, y, ratioImgSize, ratioImgSize, 2, 6, true, true) |
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ctx.drawImage(options.image, x, y, ratioImgSize, ratioImgSize); |
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// 画圆角矩形 |
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function drawRoundedRect(ctxi, x, y, width, height, r, lineWidth, fill, stroke) { |
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ctxi.setLineWidth(lineWidth); |
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ctxi.setFillStyle(options.background); |
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ctxi.setStrokeStyle(options.background); |
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ctxi.beginPath(); // draw top and top right corner |
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ctxi.moveTo(x + r, y); |
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ctxi.arcTo(x + width, y, x + width, y + r, r); // draw right side and bottom right corner |
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ctxi.arcTo(x + width, y + height, x + width - r, y + height, r); // draw bottom and bottom left corner |
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ctxi.arcTo(x, y + height, x, y + height - r, r); // draw left and top left corner |
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ctxi.arcTo(x, y, x + r, y, r); |
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ctxi.closePath(); |
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if (fill) { |
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ctxi.fill(); |
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} |
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if (stroke) { |
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ctxi.stroke(); |
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} |
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} |
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} |
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setTimeout(() => { |
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ctx.draw(true, () => { |
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// 保存到临时区域 |
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setTimeout(() => { |
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uni.canvasToTempFilePath({ |
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width: options.width, |
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height: options.height, |
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destWidth: options.width, |
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destHeight: options.height, |
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canvasId: options.canvasId, |
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quality: Number(1), |
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success: function (res) { |
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if (options.cbResult) { |
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options.cbResult(res.tempFilePath) |
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} |
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}, |
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fail: function (res) { |
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if (options.cbResult) { |
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options.cbResult(res) |
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} |
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}, |
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complete: function () { |
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if (options.showLoading){ |
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uni.hideLoading(); |
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} |
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}, |
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}, options.context); |
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}, options.text.length + 100); |
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}); |
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}, options.usingComponents ? 0 : 150); |
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} |
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createCanvas(this.options); |
|
// 空判定 |
|
let empty = function (v) { |
|
let tp = typeof v, |
|
rt = false; |
|
if (tp == "number" && String(v) == "") { |
|
rt = true |
|
} else if (tp == "undefined") { |
|
rt = true |
|
} else if (tp == "object") { |
|
if (JSON.stringify(v) == "{}" || JSON.stringify(v) == "[]" || v == null) rt = true |
|
} else if (tp == "string") { |
|
if (v == "" || v == "undefined" || v == "null" || v == "{}" || v == "[]") rt = true |
|
} else if (tp == "function") { |
|
rt = false |
|
} |
|
return rt |
|
} |
|
}; |
|
QRCode.prototype.clear = function (fn) { |
|
var ctx = uni.createCanvasContext(this.options.canvasId, this.options.context) |
|
ctx.clearRect(0, 0, this.options.size, this.options.size) |
|
ctx.draw(false, () => { |
|
if (fn) { |
|
fn() |
|
} |
|
}) |
|
}; |
|
})() |
|
|
|
export default QRCode |