纯js，不依赖jquery，非常好用，废话不多说，直接上代码！
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8" /> 5 <meta name="viewport" content="width=device-width, initial-scale=1,maximum-scale=1, user-scalable=no" /> 6 <title></title> 7 <script type="text/javascript" src="qrcode.js"></script> 8 </head> 9 <body> 10 <div id="qrcode"></div> 11 <script type="text/javascript"> 12 var container = document.getElementById("qrcode"); 13 var qrcode = new QRCode(container, { width : 128, height : 128}); 14 qrcode.makeCode('http://www.baidu.com'); 15 // 也可以：new QRCode(container, { width : 128, height : 128}).makeCode('http://www.baidu.com'); 16 </script> 17 </body> 18 </html>
1 var QRCode; 2 3 (function () { 4 //--------------------------------------------------------------------- 5 // QRCode for JavaScript 6 //--------------------------------------------------------------------- 7 function QR8bitByte(data) { 8 this.mode = QRMode.MODE_8BIT_BYTE; 9 this.data = data; 10 this.parsedData = []; 11 12 // Added to support UTF-8 Characters 13 for (var i = 0, l = this.data.length; i < l; i++) { 14 var byteArray = []; 15 var code = this.data.charCodeAt(i); 16 17 if (code > 0x10000) { 18 byteArray[0] = 0xF0 | ((code & 0x1C0000) >>> 18); 19 byteArray[1] = 0x80 | ((code & 0x3F000) >>> 12); 20 byteArray[2] = 0x80 | ((code & 0xFC0) >>> 6); 21 byteArray[3] = 0x80 | (code & 0x3F); 22 } else if (code > 0x800) { 23 byteArray[0] = 0xE0 | ((code & 0xF000) >>> 12); 24 byteArray[1] = 0x80 | ((code & 0xFC0) >>> 6); 25 byteArray[2] = 0x80 | (code & 0x3F); 26 } else if (code > 0x80) { 27 byteArray[0] = 0xC0 | ((code & 0x7C0) >>> 6); 28 byteArray[1] = 0x80 | (code & 0x3F); 29 } else { 30 byteArray[0] = code; 31 } 32 33 this.parsedData.push(byteArray); 34 } 35 36 this.parsedData = Array.prototype.concat.apply([], this.parsedData); 37 38 if (this.parsedData.length != this.data.length) { 39 this.parsedData.unshift(191); 40 this.parsedData.unshift(187); 41 this.parsedData.unshift(239); 42 } 43 } 44 45 QR8bitByte.prototype = { 46 getLength: function (buffer) { 47 return this.parsedData.length; 48 }, 49 write: function (buffer) { 50 for (var i = 0, l = this.parsedData.length; i < l; i++) { 51 buffer.put(this.parsedData[i], 8); 52 } 53 } 54 }; 55 56 function QRCodeModel(typeNumber, errorCorrectLevel) { 57 this.typeNumber = typeNumber; 58 this.errorCorrectLevel = errorCorrectLevel; 59 this.modules = null; 60 this.moduleCount = 0; 61 this.dataCache = null; 62 this.dataList = []; 63 } 64 65 function QRPolynomial(num, shift) { 66 if (num.length == undefined) throw new Error(num.length + "/" + shift); 67 var offset = 0; 68 while (offset < num.length && num[offset] == 0) offset++; 69 this.num = new Array(num.length - offset + shift); 70 for (var i = 0; i < num.length - offset; i++) this.num[i] = num[i + offset]; 71 } 72 73 function QRRSBlock(totalCount, dataCount) { 74 this.totalCount = totalCount, this.dataCount = dataCount; 75 } 76 77 function QRBitBuffer() { 78 this.buffer = [], this.length = 0; 79 } 80 81 QRCodeModel.prototype = { 82 "addData": function(data) { 83 var newData = new QR8bitByte(data); 84 this.dataList.push(newData), this.dataCache = null; 85 }, 86 "isDark": function(row, col) { 87 if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) throw new Error(row + "," + col); 88 return this.modules[row][col]; 89 }, 90 "getModuleCount": function() { 91 return this.moduleCount; 92 }, 93 "make": function() { 94 this.makeImpl(!1, this.getBestMaskPattern()); 95 }, 96 "makeImpl": function(test, maskPattern) { 97 this.moduleCount = this.typeNumber * 4 + 17, this.modules = new Array(this.moduleCount); 98 for (var row = 0; row < this.moduleCount; row++) { 99 this.modules[row] = new Array(this.moduleCount); 100 for (var col = 0; col < this.moduleCount; col++) this.modules[row][col] = null; 101 } 102 this.setupPositionProbePattern(0, 0), 103 this.setupPositionProbePattern(this.moduleCount - 7, 0), 104 this.setupPositionProbePattern(0, this.moduleCount - 7), 105 this.setupPositionAdjustPattern(), this.setupTimingPattern(), 106 this.setupTypeInfo(test, maskPattern), 107 this.typeNumber >= 7 && this.setupTypeNumber(test), 108 this.dataCache == null && (this.dataCache = QRCodeModel.createData(this.typeNumber, this.errorCorrectLevel, this.dataList)), this.mapData(this.dataCache, maskPattern); 109 }, 110 "setupPositionProbePattern": function(row, col) { 111 for (var r = -1; r <= 7; r++) { 112 if (row + r <= -1 || this.moduleCount <= row + r) continue; 113 for (var c = -1; c <= 7; c++) { 114 if (col + c <= -1 || this.moduleCount <= col + c) continue; 115 0 <= r && r <= 6 && (c == 0 || c == 6) || 0 <= c && c <= 6 && (r == 0 || r == 6) || 2 <= r && r <= 4 && 2 <= c && c <= 4 ? this.modules[row + r][col + c] = !0 : this.modules[row + r][col + c] = !1; 116 } 117 } 118 }, 119 "getBestMaskPattern": function() { 120 var minLostPoint = 0, pattern = 0; 121 for (var i = 0; i < 8; i++) { 122 this.makeImpl(!0, i); 123 var lostPoint = QRUtil.getLostPoint(this); 124 if (i == 0 || minLostPoint > lostPoint) minLostPoint = lostPoint, pattern = i; 125 } 126 return pattern; 127 }, 128 "createMovieClip": function(target_mc, instance_name, depth) { 129 var qr_mc = target_mc.createEmptyMovieClip(instance_name, depth), cs = 1; 130 this.make(); 131 for (var row = 0; row < this.modules.length; row++) { 132 var y = row * cs; 133 for (var col = 0; col < this.modules[row].length; col++) { 134 var x = col * cs, dark = this.modules[row][col]; 135 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()); 136 } 137 } 138 return qr_mc; 139 }, 140 "setupTimingPattern": function() { 141 for (var r = 8; r < this.moduleCount - 8; r++) { 142 if (this.modules[r][6] != null) continue; 143 this.modules[r][6] = r % 2 == 0; 144 } 145 for (var c = 8; c < this.moduleCount - 8; c++) { 146 if (this.modules[6][c] != null) continue; 147 this.modules[6][c] = c % 2 == 0; 148 } 149 }, 150 "setupPositionAdjustPattern": function() { 151 var pos = QRUtil.getPatternPosition(this.typeNumber); 152 for (var i = 0; i < pos.length; i++) for (var j = 0; j < pos.length; j++) { 153 var row = pos[i], col = pos[j]; 154 if (this.modules[row][col] != null) continue; 155 for (var r = -2; r <= 2; r++) for (var c = -2; c <= 2; c++) r == -2 || r == 2 || c == -2 || c == 2 || r == 0 && c == 0 ? this.modules[row + r][col + c] = !0 : this.modules[row + r][col + c] = !1; 156 } 157 }, 158 "setupTypeNumber": function(test) { 159 var bits = QRUtil.getBCHTypeNumber(this.typeNumber); 160 for (var i = 0; i < 18; i++) { 161 var mod = !test && (bits >> i & 1) == 1; 162 this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod; 163 } 164 for (var i = 0; i < 18; i++) { 165 var mod = !test && (bits >> i & 1) == 1; 166 this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod; 167 } 168 }, 169 "setupTypeInfo": function(test, maskPattern) { 170 var data = this.errorCorrectLevel << 3 | maskPattern, bits = QRUtil.getBCHTypeInfo(data); 171 for (var i = 0; i < 15; i++) { 172 var mod = !test && (bits >> i & 1) == 1; 173 i < 6 ? this.modules[i][8] = mod : i < 8 ? this.modules[i + 1][8] = mod : this.modules[this.moduleCount - 15 + i][8] = mod; 174 } 175 for (var i = 0; i < 15; i++) { 176 var mod = !test && (bits >> i & 1) == 1; 177 i < 8 ? this.modules[8][this.moduleCount - i - 1] = mod : i < 9 ? this.modules[8][15 - i - 1 + 1] = mod : this.modules[8][15 - i - 1] = mod; 178 } 179 this.modules[this.moduleCount - 8][8] = !test; 180 }, 181 "mapData": function(data, maskPattern) { 182 var inc = -1, row = this.moduleCount - 1, bitIndex = 7, byteIndex = 0; 183 for (var col = this.moduleCount - 1; col > 0; col -= 2) { 184 col == 6 && col--; 185 for (;;) { 186 for (var c = 0; c < 2; c++) if (this.modules[row][col - c] == null) { 187 var dark = !1; 188 byteIndex < data.length && (dark = (data[byteIndex] >>> bitIndex & 1) == 1); 189 var mask = QRUtil.getMask(maskPattern, row, col - c); 190 mask && (dark = !dark), this.modules[row][col - c] = dark, bitIndex--, bitIndex == -1 && (byteIndex++, bitIndex = 7); 191 } 192 row += inc; 193 if (row < 0 || this.moduleCount <= row) { 194 row -= inc, inc = -inc; 195 break; 196 } 197 } 198 } 199 } 200 }, QRCodeModel.PAD0 = 236, QRCodeModel.PAD1 = 17, QRCodeModel.createData = function(typeNumber, errorCorrectLevel, dataList) { 201 var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel), buffer = new QRBitBuffer; 202 for (var i = 0; i < dataList.length; i++) { 203 var data = dataList[i]; 204 buffer.put(data.mode, 4), buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber)), data.write(buffer); 205 } 206 var totalDataCount = 0; 207 for (var i = 0; i < rsBlocks.length; i++) totalDataCount += rsBlocks[i].dataCount; 208 if (buffer.getLengthInBits() > totalDataCount * 8) throw new Error("code length overflow. (" + buffer.getLengthInBits() + ">" + totalDataCount * 8 + ")"); 209 buffer.getLengthInBits() + 4 <= totalDataCount * 8 && buffer.put(0, 4); 210 while (buffer.getLengthInBits() % 8 != 0) buffer.putBit(!1); 211 for (;;) { 212 if (buffer.getLengthInBits() >= totalDataCount * 8) break; 213 buffer.put(QRCodeModel.PAD0, 8); 214 if (buffer.getLengthInBits() >= totalDataCount * 8) break; 215 buffer.put(QRCodeModel.PAD1, 8); 216 } 217 return QRCodeModel.createBytes(buffer, rsBlocks); 218 }, QRCodeModel.createBytes = function(buffer, rsBlocks) { 219 var offset = 0, maxDcCount = 0, maxEcCount = 0, dcdata = new Array(rsBlocks.length), ecdata = new Array(rsBlocks.length); 220 for (var r = 0; r < rsBlocks.length; r++) { 221 var dcCount = rsBlocks[r].dataCount, ecCount = rsBlocks[r].totalCount - dcCount; 222 maxDcCount = Math.max(maxDcCount, dcCount), maxEcCount = Math.max(maxEcCount, ecCount), dcdata[r] = new Array(dcCount); 223 for (var i = 0; i < dcdata[r].length; i++) dcdata[r][i] = 255 & buffer.buffer[i + offset]; 224 offset += dcCount; 225 var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount), rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1), modPoly = rawPoly.mod(rsPoly); 226 ecdata[r] = new Array(rsPoly.getLength() - 1); 227 for (var i = 0; i < ecdata[r].length; i++) { 228 var modIndex = i + modPoly.getLength() - ecdata[r].length; 229 ecdata[r][i] = modIndex >= 0 ? modPoly.get(modIndex) : 0; 230 } 231 } 232 var totalCodeCount = 0; 233 for (var i = 0; i < rsBlocks.length; i++) totalCodeCount += rsBlocks[i].totalCount; 234 var data = new Array(totalCodeCount), index = 0; 235 for (var i = 0; i < maxDcCount; i++) for (var r = 0; r < rsBlocks.length; r++) i < dcdata[r].length && (data[index++] = dcdata[r][i]); 236 for (var i = 0; i < maxEcCount; i++) for (var r = 0; r < rsBlocks.length; r++) i < ecdata[r].length && (data[index++] = ecdata[r][i]); 237 return data; 238 }; 239 240 var QRMode = { 241 "MODE_NUMBER": 1, 242 "MODE_ALPHA_NUM": 2, 243 "MODE_8BIT_BYTE": 4, 244 "MODE_KANJI": 8 245 }, QRErrorCorrectLevel = { 246 "L": 1, 247 "M": 0, 248 "Q": 3, 249 "H": 2 250 }, QRMaskPattern = { 251 "PATTERN000": 0, 252 "PATTERN001": 1, 253 "PATTERN010": 2, 254 "PATTERN011": 3, 255 "PATTERN100": 4, 256 "PATTERN101": 5, 257 "PATTERN110": 6, 258 "PATTERN111": 7 259 }, QRUtil = { 260 "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 ] ], 261 "G15": 1335, 262 "G18": 7973, 263 "G15_MASK": 21522, 264 "getBCHTypeInfo": function(data) { 265 var d = data << 10; 266 while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) d ^= QRUtil.G15 << QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15); 267 return (data << 10 | d) ^ QRUtil.G15_MASK; 268 }, 269 "getBCHTypeNumber": function(data) { 270 var d = data << 12; 271 while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) d ^= QRUtil.G18 << QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18); 272 return data << 12 | d; 273 }, 274 "getBCHDigit": function(data) { 275 var digit = 0; 276 while (data != 0) digit++, data >>>= 1; 277 return digit; 278 }, 279 "getPatternPosition": function(typeNumber) { 280 return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1]; 281 }, 282 "getMask": function(maskPattern, i, j) { 283 switch (maskPattern) { 284 case QRMaskPattern.PATTERN000: 285 return (i + j) % 2 == 0; 286 case QRMaskPattern.PATTERN001: 287 return i % 2 == 0; 288 case QRMaskPattern.PATTERN010: 289 return j % 3 == 0; 290 case QRMaskPattern.PATTERN011: 291 return (i + j) % 3 == 0; 292 case QRMaskPattern.PATTERN100: 293 return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0; 294 case QRMaskPattern.PATTERN101: 295 return i * j % 2 + i * j % 3 == 0; 296 case QRMaskPattern.PATTERN110: 297 return (i * j % 2 + i * j % 3) % 2 == 0; 298 case QRMaskPattern.PATTERN111: 299 return (i * j % 3 + (i + j) % 2) % 2 == 0; 300 default: 301 throw new Error("bad maskPattern:" + maskPattern); 302 } 303 }, 304 "getErrorCorrectPolynomial": function(errorCorrectLength) { 305 var a = new QRPolynomial([ 1 ], 0); 306 for (var i = 0; i < errorCorrectLength; i++) a = a.multiply(new QRPolynomial([ 1, QRMath.gexp(i) ], 0)); 307 return a; 308 }, 309 "getLengthInBits": function(mode, type) { 310 if (1 <= type && type < 10) switch (mode) { 311 case QRMode.MODE_NUMBER: 312 return 10; 313 case QRMode.MODE_ALPHA_NUM: 314 return 9; 315 case QRMode.MODE_8BIT_BYTE: 316 return 8; 317 case QRMode.MODE_KANJI: 318 return 8; 319 default: 320 throw new Error("mode:" + mode); 321 } else if (type < 27) switch (mode) { 322 case QRMode.MODE_NUMBER: 323 return 12; 324 case QRMode.MODE_ALPHA_NUM: 325 return 11; 326 case QRMode.MODE_8BIT_BYTE: 327 return 16; 328 case QRMode.MODE_KANJI: 329 return 10; 330 default: 331 throw new Error("mode:" + mode); 332 } else { 333 if (!(type < 41)) throw new Error("type:" + type); 334 switch (mode) { 335 case QRMode.MODE_NUMBER: 336 return 14; 337 case QRMode.MODE_ALPHA_NUM: 338 return 13; 339 case QRMode.MODE_8BIT_BYTE: 340 return 16; 341 case QRMode.MODE_KANJI: 342 return 12; 343 default: 344 throw new Error("mode:" + mode); 345 } 346 } 347 }, 348 "getLostPoint": function(qrCode) { 349 var moduleCount = qrCode.getModuleCount(), lostPoint = 0; 350 for (var row = 0; row < moduleCount; row++) for (var col = 0; col < moduleCount; col++) { 351 var sameCount = 0, dark = qrCode.isDark(row, col); 352 for (var r = -1; r <= 1; r++) { 353 if (row + r < 0 || moduleCount <= row + r) continue; 354 for (var c = -1; c <= 1; c++) { 355 if (col + c < 0 || moduleCount <= col + c) continue; 356 if (r == 0 && c == 0) continue; 357 dark == qrCode.isDark(row + r, col + c) && sameCount++; 358 } 359 } 360 sameCount > 5 && (lostPoint += 3 + sameCount - 5); 361 } 362 for (var row = 0; row < moduleCount - 1; row++) for (var col = 0; col < moduleCount - 1; col++) { 363 var count = 0; 364 qrCode.isDark(row, col) && count++, qrCode.isDark(row + 1, col) && count++, qrCode.isDark(row, col + 1) && count++, qrCode.isDark(row + 1, col + 1) && count++; 365 if (count == 0 || count == 4) lostPoint += 3; 366 } 367 for (var row = 0; row < moduleCount; row++) for (var col = 0; col < moduleCount - 6; col++) qrCode.isDark(row, col) && !qrCode.isDark(row, col + 1) && qrCode.isDark(row, col + 2) && qrCode.isDark(row, col + 3) && qrCode.isDark(row, col + 4) && !qrCode.isDark(row, col + 5) && qrCode.isDark(row, col + 6) && (lostPoint += 40); 368 for (var col = 0; col < moduleCount; col++) for (var row = 0; row < moduleCount - 6; row++) qrCode.isDark(row, col) && !qrCode.isDark(row + 1, col) && qrCode.isDark(row + 2, col) && qrCode.isDark(row + 3, col) && qrCode.isDark(row + 4, col) && !qrCode.isDark(row + 5, col) && qrCode.isDark(row + 6, col) && (lostPoint += 40); 369 var darkCount = 0; 370 for (var col = 0; col < moduleCount; col++) for (var row = 0; row < moduleCount; row++) qrCode.isDark(row, col) && darkCount++; 371 var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5; 372 return lostPoint += ratio * 10, lostPoint; 373 } 374 }, QRMath = { 375 "glog": function(n) { 376 if (n < 1) throw new Error("glog(" + n + ")"); 377 return QRMath.LOG_TABLE[n]; 378 }, 379 "gexp": function(n) { 380 while (n < 0) n += 255; 381 while (n >= 256) n -= 255; 382 return QRMath.EXP_TABLE[n]; 383 }, 384 "EXP_TABLE": new Array(256), 385 "LOG_TABLE": new Array(256) 386 }; 387 388 for (var i = 0; i < 8; i++) QRMath.EXP_TABLE[i] = 1 << i; 389 390 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]; 391 392 for (var i = 0; i < 255; i++) QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i; 393 394 QRPolynomial.prototype = { 395 "get": function(index) { 396 return this.num[index]; 397 }, 398 "getLength": function() { 399 return this.num.length; 400 }, 401 "multiply": function(e) { 402 var num = new Array(this.getLength() + e.getLength() - 1); 403 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))); 404 return new QRPolynomial(num, 0); 405 }, 406 "mod": function(e) { 407 if (this.getLength() - e.getLength() < 0) return this; 408 var ratio = QRMath.glog(this.get(0)) - QRMath.glog(e.get(0)), num = new Array(this.getLength()); 409 for (var i = 0; i < this.getLength(); i++) num[i] = this.get(i); 410 for (var i = 0; i < e.getLength(); i++) num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio); 411 return (new QRPolynomial(num, 0)).mod(e); 412 } 413 }, QRRSBlock.RS_BLOCK_TABLE = [ [ 1, 26, 19 ], [ 1, 26, 16 ], [ 1, 26, 13 ], [ 1, 26, 9 ], [ 1, 44, 34 ], [ 1, 44, 28 ], [ 1, 44, 22 ], [ 1, 44, 16 ], [ 1, 70, 55 ], [ 1, 70, 44 ], [ 2, 35, 17 ], [ 2, 35, 13 ], [ 1, 100, 80 ], [ 2, 50, 32 ], [ 2, 50, 24 ], [ 4, 25, 9 ], [ 1, 134, 108 ], [ 2, 67, 43 ], [ 2, 33, 15, 2, 34, 16 ], [ 2, 33, 11, 2, 34, 12 ], [ 2, 86, 68 ], [ 4, 43, 27 ], [ 4, 43, 19 ], [ 4, 43, 15 ], [ 2, 98, 78 ], [ 4, 49, 31 ], [ 2, 32, 14, 4, 33, 15 ], [ 4, 39, 13, 1, 40, 14 ], [ 2, 121, 97 ], [ 2, 60, 38, 2, 61, 39 ], [ 4, 40, 18, 2, 41, 19 ], [ 4, 40, 14, 2, 41, 15 ], [ 2, 146, 116 ], [ 3, 58, 36, 2, 59, 37 ], [ 4, 36, 16, 4, 37, 17 ], [ 4, 36, 12, 4, 37, 13 ], [ 2, 86, 68, 2, 87, 69 ], [ 4, 69, 43, 1, 70, 44 ], [ 6, 43, 19, 2, 44, 20 ], [ 6, 43, 15, 2, 44, 16 ], [ 4, 101, 81 ], [ 1, 80, 50, 4, 81, 51 ], [ 4, 50, 22, 4, 51, 23 ], [ 3, 36, 12, 8, 37, 13 ], [ 2, 116, 92, 2, 117, 93 ], [ 6, 58, 36, 2, 59, 37 ], [ 4, 46, 20, 6, 47, 21 ], [ 7, 42, 14, 4, 43, 15 ], [ 4, 133, 107 ], [ 8, 59, 37, 1, 60, 38 ], [ 8, 44, 20, 4, 45, 21 ], [ 12, 33, 11, 4, 34, 12 ], [ 3, 145, 115, 1, 146, 116 ], [ 4, 64, 40, 5, 65, 41 ], [ 11, 36, 16, 5, 37, 17 ], [ 11, 36, 12, 5, 37, 13 ], [ 5, 109, 87, 1, 110, 88 ], [ 5, 65, 41, 5, 66, 42 ], [ 5, 54, 24, 7, 55, 25 ], [ 11, 36, 12 ], [ 5, 122, 98, 1, 123, 99 ], [ 7, 73, 45, 3, 74, 46 ], [ 15, 43, 19, 2, 44, 20 ], [ 3, 45, 15, 13, 46, 16 ], [ 1, 135, 107, 5, 136, 108 ], [ 10, 74, 46, 1, 75, 47 ], [ 1, 50, 22, 15, 51, 23 ], [ 2, 42, 14, 17, 43, 15 ], [ 5, 150, 120, 1, 151, 121 ], [ 9, 69, 43, 4, 70, 44 ], [ 17, 50, 22, 1, 51, 23 ], [ 2, 42, 14, 19, 43, 15 ], [ 3, 141, 113, 4, 142, 114 ], [ 3, 70, 44, 11, 71, 45 ], [ 17, 47, 21, 4, 48, 22 ], [ 9, 39, 13, 16, 40, 14 ], [ 3, 135, 107, 5, 136, 108 ], [ 3, 67, 41, 13, 68, 42 ], [ 15, 54, 24, 5, 55, 25 ], [ 15, 43, 15, 10, 44, 16 ], [ 4, 144, 116, 4, 145, 117 ], [ 17, 68, 42 ], [ 17, 50, 22, 6, 51, 23 ], [ 19, 46, 16, 6, 47, 17 ], [ 2, 139, 111, 7, 140, 112 ], [ 17, 74, 46 ], [ 7, 54, 24, 16, 55, 25 ], [ 34, 37, 13 ], [ 4, 151, 121, 5, 152, 122 ], [ 4, 75, 47, 14, 76, 48 ], [ 11, 54, 24, 14, 55, 25 ], [ 16, 45, 15, 14, 46, 16 ], [ 6, 147, 117, 4, 148, 118 ], [ 6, 73, 45, 14, 74, 46 ], [ 11, 54, 24, 16, 55, 25 ], [ 30, 46, 16, 2, 47, 17 ], [ 8, 132, 106, 4, 133, 107 ], [ 8, 75, 47, 13, 76, 48 ], [ 7, 54, 24, 22, 55, 25 ], [ 22, 45, 15, 13, 46, 16 ], [ 10, 142, 114, 2, 143, 115 ], [ 19, 74, 46, 4, 75, 47 ], [ 28, 50, 22, 6, 51, 23 ], [ 33, 46, 16, 4, 47, 17 ], [ 8, 152, 122, 4, 153, 123 ], [ 22, 73, 45, 3, 74, 46 ], [ 8, 53, 23, 26, 54, 24 ], [ 12, 45, 15, 28, 46, 16 ], [ 3, 147, 117, 10, 148, 118 ], [ 3, 73, 45, 23, 74, 46 ], [ 4, 54, 24, 31, 55, 25 ], [ 11, 45, 15, 31, 46, 16 ], [ 7, 146, 116, 7, 147, 117 ], [ 21, 73, 45, 7, 74, 46 ], [ 1, 53, 23, 37, 54, 24 ], [ 19, 45, 15, 26, 46, 16 ], [ 5, 145, 115, 10, 146, 116 ], [ 19, 75, 47, 10, 76, 48 ], [ 15, 54, 24, 25, 55, 25 ], [ 23, 45, 15, 25, 46, 16 ], [ 13, 145, 115, 3, 146, 116 ], [ 2, 74, 46, 29, 75, 47 ], [ 42, 54, 24, 1, 55, 25 ], [ 23, 45, 15, 28, 46, 16 ], [ 17, 145, 115 ], [ 10, 74, 46, 23, 75, 47 ], [ 10, 54, 24, 35, 55, 25 ], [ 19, 45, 15, 35, 46, 16 ], [ 17, 145, 115, 1, 146, 116 ], [ 14, 74, 46, 21, 75, 47 ], [ 29, 54, 24, 19, 55, 25 ], [ 11, 45, 15, 46, 46, 16 ], [ 13, 145, 115, 6, 146, 116 ], [ 14, 74, 46, 23, 75, 47 ], [ 44, 54, 24, 7, 55, 25 ], [ 59, 46, 16, 1, 47, 17 ], [ 12, 151, 121, 7, 152, 122 ], [ 12, 75, 47, 26, 76, 48 ], [ 39, 54, 24, 14, 55, 25 ], [ 22, 45, 15, 41, 46, 16 ], [ 6, 151, 121, 14, 152, 122 ], [ 6, 75, 47, 34, 76, 48 ], [ 46, 54, 24, 10, 55, 25 ], [ 2, 45, 15, 64, 46, 16 ], [ 17, 152, 122, 4, 153, 123 ], [ 29, 74, 46, 14, 75, 47 ], [ 49, 54, 24, 10, 55, 25 ], [ 24, 45, 15, 46, 46, 16 ], [ 4, 152, 122, 18, 153, 123 ], [ 13, 74, 46, 32, 75, 47 ], [ 48, 54, 24, 14, 55, 25 ], [ 42, 45, 15, 32, 46, 16 ], [ 20, 147, 117, 4, 148, 118 ], [ 40, 75, 47, 7, 76, 48 ], [ 43, 54, 24, 22, 55, 25 ], [ 10, 45, 15, 67, 46, 16 ], [ 19, 148, 118, 6, 149, 119 ], [ 18, 75, 47, 31, 76, 48 ], [ 34, 54, 24, 34, 55, 25 ], [ 20, 45, 15, 61, 46, 16 ] ], QRRSBlock.getRSBlocks = function(typeNumber, errorCorrectLevel) { 414 var rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel); 415 if (rsBlock == undefined) throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel); 416 var length = rsBlock.length / 3, list = []; 417 for (var i = 0; i < length; i++) { 418 var count = rsBlock[i * 3 + 0], totalCount = rsBlock[i * 3 + 1], dataCount = rsBlock[i * 3 + 2]; 419 for (var j = 0; j < count; j++) list.push(new QRRSBlock(totalCount, dataCount)); 420 } 421 return list; 422 }, QRRSBlock.getRsBlockTable = function(typeNumber, errorCorrectLevel) { 423 switch (errorCorrectLevel) { 424 case QRErrorCorrectLevel.L: 425 return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0]; 426 case QRErrorCorrectLevel.M: 427 return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1]; 428 case QRErrorCorrectLevel.Q: 429 return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2]; 430 case QRErrorCorrectLevel.H: 431 return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3]; 432 default: 433 return undefined; 434 } 435 }, QRBitBuffer.prototype = { 436 "get": function(index) { 437 var bufIndex = Math.floor(index / 8); 438 return (this.buffer[bufIndex] >>> 7 - index % 8 & 1) == 1; 439 }, 440 "put": function(num, length) { 441 for (var i = 0; i < length; i++) this.putBit((num >>> length - i - 1 & 1) == 1); 442 }, 443 "getLengthInBits": function() { 444 return this.length; 445 }, 446 "putBit": function(bit) { 447 var bufIndex = Math.floor(this.length / 8); 448 this.buffer.length <= bufIndex && this.buffer.push(0), bit && (this.buffer[bufIndex] |= 128 >>> this.length % 8), this.length++; 449 } 450 }; 451 var QRCodeLimitLength=[[17,14,11,7],[32,26,20,14],[53,42,32,24],[78,62,46,34],[106,84,60,44],[134,106,74,58],[154,122,86,64],[192,152,108,84],[230,180,130,98],[271,213,151,119],[321,251,177,137],[367,287,203,155],[425,331,241,177],[458,362,258,194],[520,412,292,220],[586,450,322,250],[644,504,364,280],[718,560,394,310],[792,624,442,338],[858,666,482,382],[929,711,509,403],[1003,779,565,439],[1091,857,611,461],[1171,911,661,511],[1273,997,715,535],[1367,1059,751,593],[1465,1125,805,625],[1528,1190,868,658],[1628,1264,908,698],[1732,1370,982,742],[1840,1452,1030,790],[1952,1538,1112,842],[2068,1628,1168,898],[2188,1722,1228,958],[2303,1809,1283,983],[2431,1911,1351,1051],[2563,1989,1423,1093],[2699,2099,1499,1139],[2809,2213,1579,1219],[2953,2331,1663,1273]]; 452 453 function _isSupportCanvas() { 454 return typeof CanvasRenderingContext2D != "undefined"; 455 } 456 457 // android 2.x doesn't support Data-URI spec 458 function _getAndroid() { 459 var android = false; 460 var sAgent = navigator.userAgent; 461 462 if (/android/i.test(sAgent)) { // android 463 android = true; 464 aMat = sAgent.toString().match(/android ([0-9].[0-9])/i); 465 466 if (aMat && aMat[1]) { 467 android = parseFloat(aMat[1]); 468 } 469 } 470 471 return android; 472 } 473 474 var svgDrawer = (function() { 475 476 var Drawing = function (el, htOption) { 477 this._el = el; 478 this._htOption = htOption; 479 }; 480 481 Drawing.prototype.draw = function (oQRCode) { 482 var _htOption = this._htOption; 483 var _el = this._el; 484 var nCount = oQRCode.getModuleCount(); 485 var nWidth = Math.floor(_htOption.width / nCount); 486 var nHeight = Math.floor(_htOption.height / nCount); 487 488 this.clear(); 489 490 function makeSVG(tag, attrs) { 491 var el = document.createElementNS('http://www.w3.org/2000/svg', tag); 492 for (var k in attrs) 493 if (attrs.hasOwnProperty(k)) el.setAttribute(k, attrs[k]); 494 return el; 495 } 496 497 var svg = makeSVG("svg" , {'viewBox': '0 0 ' + String(nCount) + " " + String(nCount), 'width': '100%', 'height': '100%', 'fill': _htOption.colorLight}); 498 svg.setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:xlink", "http://www.w3.org/1999/xlink"); 499 _el.appendChild(svg); 500 501 svg.appendChild(makeSVG("rect", {"fill": _htOption.colorDark, "width": "1", "height": "1", "id": "template"})); 502 503 for (var row = 0; row < nCount; row++) { 504 for (var col = 0; col < nCount; col++) { 505 if (oQRCode.isDark(row, col)) { 506 var child = makeSVG("use", {"x": String(row), "y": String(col)}); 507 child.setAttributeNS("http://www.w3.org/1999/xlink", "href", "#template") 508 svg.appendChild(child); 509 } 510 } 511 } 512 }; 513 Drawing.prototype.clear = function () { 514 while (this._el.hasChildNodes()) 515 this._el.removeChild(this._el.lastChild); 516 }; 517 return Drawing; 518 })(); 519 520 var useSVG = document.documentElement.tagName.toLowerCase() === "svg"; 521 522 // Drawing in DOM by using Table tag 523 var Drawing = useSVG ? svgDrawer : !_isSupportCanvas() ? (function () { 524 var Drawing = function (el, htOption) { 525 this._el = el; 526 this._htOption = htOption; 527 }; 528 529 /** 530 * Draw the QRCode 531 * 532 * @param {QRCode} oQRCode 533 */ 534 Drawing.prototype.draw = function (oQRCode) { 535 var _htOption = this._htOption; 536 var _el = this._el; 537 var nCount = oQRCode.getModuleCount(); 538 var nWidth = Math.floor(_htOption.width / nCount); 539 var nHeight = Math.floor(_htOption.height / nCount); 540 var aHTML = ['<table style="border:0;border-collapse:collapse;">']; 541 542 for (var row = 0; row < nCount; row++) { 543 aHTML.push('<tr>'); 544 545 for (var col = 0; col < nCount; col++) { 546 aHTML.push('<td style="border:0;border-collapse:collapse;padding:0;margin:0;' + nWidth + 'px;height:' + nHeight + 'px;background-color:' + (oQRCode.isDark(row, col) ? _htOption.colorDark : _htOption.colorLight) + ';"></td>'); 547 } 548 549 aHTML.push('</tr>'); 550 } 551 552 aHTML.push('</table>'); 553 _el.innerHTML = aHTML.join(''); 554 555 // Fix the margin values as real size. 556 var elTable = _el.childNodes[0]; 557 var nLeftMarginTable = (_htOption.width - elTable.offsetWidth) / 2; 558 var nTopMarginTable = (_htOption.height - elTable.offsetHeight) / 2; 559 if (nLeftMarginTable > 0 && nTopMarginTable > 0) { 560 elTable.style.margin = nTopMarginTable + "px " + nLeftMarginTable + "px"; 561 } 562 }; 563 564 /** 565 * Clear the QRCode 566 */ 567 Drawing.prototype.clear = function () { 568 this._el.innerHTML = ''; 569 }; 570 571 return Drawing; 572 })() : (function () { // Drawing in Canvas 573 function _onMakeImage() { 574 this._elImage.src = this._elCanvas.toDataURL("image/png"); 575 this._elImage.style.display = "block"; 576 this._elCanvas.style.display = "none"; 577 } 578 579 // Android 2.1 bug workaround 580 // http://code.google.com/p/android/issues/detail?id=5141 581 if (this._android && this._android <= 2.1) { 582 var factor = 1 / window.devicePixelRatio; 583 var drawImage = CanvasRenderingContext2D.prototype.drawImage; 584 CanvasRenderingContext2D.prototype.drawImage = function (image, sx, sy, sw, sh, dx, dy, dw, dh) { 585 if (("nodeName" in image) && /img/i.test(image.nodeName)) { 586 for (var i = arguments.length - 1; i >= 1; i--) { 587 arguments[i] = arguments[i] * factor; 588 } 589 } else if (typeof dw == "undefined") { 590 arguments[1] *= factor; 591 arguments[2] *= factor; 592 arguments[3] *= factor; 593 arguments[4] *= factor; 594 } 595 596 drawImage.apply(this, arguments); 597 }; 598 } 599 600 /** 601 * Check whether the user's browser supports Data URI or not 602 * 603 * @private 604 * @param {Function} fSuccess Occurs if it supports Data URI 605 * @param {Function} fFail Occurs if it doesn't support Data URI 606 */ 607 function _safeSetDataURI(fSuccess, fFail) { 608 var self = this; 609 self._fFail = fFail; 610 self._fSuccess = fSuccess; 611 612 // Check it just once 613 if (self._bSupportDataURI === null) { 614 var el = document.createElement("img"); 615 var fOnError = function() { 616 self._bSupportDataURI = false; 617 618 if (self._fFail) { 619 _fFail.call(self); 620 } 621 }; 622 var fOnSuccess = function() { 623 self._bSupportDataURI = true; 624 625 if (self._fSuccess) { 626 self._fSuccess.call(self); 627 } 628 }; 629 630 el.onabort = fOnError; 631 el.onerror = fOnError; 632 el.onload = fOnSuccess; 633 el.src = "data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="; // the Image contains 1px data. 634 return; 635 } else if (self._bSupportDataURI === true && self._fSuccess) { 636 self._fSuccess.call(self); 637 } else if (self._bSupportDataURI === false && self._fFail) { 638 self._fFail.call(self); 639 } 640 }; 641 642 /** 643 * Drawing QRCode by using canvas 644 * 645 * @constructor 646 * @param {HTMLElement} el 647 * @param {Object} htOption QRCode Options 648 */ 649 var Drawing = function (el, htOption) { 650 this._bIsPainted = false; 651 this._android = _getAndroid(); 652 653 this._htOption = htOption; 654 this._elCanvas = document.createElement("canvas"); 655 this._elCanvas.width = htOption.width; 656 this._elCanvas.height = htOption.height; 657 el.appendChild(this._elCanvas); 658 this._el = el; 659 this._oContext = this._elCanvas.getContext("2d"); 660 this._bIsPainted = false; 661 this._elImage = document.createElement("img"); 662 this._elImage.alt = "Scan me!"; 663 this._elImage.style.display = "none"; 664 this._el.appendChild(this._elImage); 665 this._bSupportDataURI = null; 666 }; 667 668 /** 669 * Draw the QRCode 670 * 671 * @param {QRCode} oQRCode 672 */ 673 Drawing.prototype.draw = function (oQRCode) { 674 var _elImage = this._elImage; 675 var _oContext = this._oContext; 676 var _htOption = this._htOption; 677 678 var nCount = oQRCode.getModuleCount(); 679 var nWidth = _htOption.width / nCount; 680 var nHeight = _htOption.height / nCount; 681 var nRoundedWidth = Math.round(nWidth); 682 var nRoundedHeight = Math.round(nHeight); 683 684 _elImage.style.display = "none"; 685 this.clear(); 686 687 for (var row = 0; row < nCount; row++) { 688 for (var col = 0; col < nCount; col++) { 689 var bIsDark = oQRCode.isDark(row, col); 690 var nLeft = col * nWidth; 691 var nTop = row * nHeight; 692 _oContext.strokeStyle = bIsDark ? _htOption.colorDark : _htOption.colorLight; 693 _oContext.lineWidth = 1; 694 _oContext.fillStyle = bIsDark ? _htOption.colorDark : _htOption.colorLight; 695 _oContext.fillRect(nLeft, nTop, nWidth, nHeight); 696 697 _oContext.strokeRect( 698 Math.floor(nLeft) + 0.5, 699 Math.floor(nTop) + 0.5, 700 nRoundedWidth, 701 nRoundedHeight 702 ); 703 704 _oContext.strokeRect( 705 Math.ceil(nLeft) - 0.5, 706 Math.ceil(nTop) - 0.5, 707 nRoundedWidth, 708 nRoundedHeight 709 ); 710 } 711 } 712 713 this._bIsPainted = true; 714 }; 715 716 /** 717 * Make the image from Canvas if the browser supports Data URI. 718 */ 719 Drawing.prototype.makeImage = function () { 720 if (this._bIsPainted) { 721 _safeSetDataURI.call(this, _onMakeImage); 722 } 723 }; 724 725 /** 726 * Return whether the QRCode is painted or not 727 * 728 * @return {Boolean} 729 */ 730 Drawing.prototype.isPainted = function () { 731 return this._bIsPainted; 732 }; 733 734 /** 735 * Clear the QRCode 736 */ 737 Drawing.prototype.clear = function () { 738 this._oContext.clearRect(0, 0, this._elCanvas.width, this._elCanvas.height); 739 this._bIsPainted = false; 740 }; 741 742 /** 743 * @private 744 * @param {Number} nNumber 745 */ 746 Drawing.prototype.round = function (nNumber) { 747 if (!nNumber) { 748 return nNumber; 749 } 750 751 return Math.floor(nNumber * 1000) / 1000; 752 }; 753 754 return Drawing; 755 })(); 756 757 /** 758 * Get the type by string length 759 * 760 * @private 761 * @param {String} sText 762 * @param {Number} nCorrectLevel 763 * @return {Number} type 764 */ 765 function _getTypeNumber(sText, nCorrectLevel) { 766 var nType = 1; 767 var length = _getUTF8Length(sText); 768 769 for (var i = 0, len = QRCodeLimitLength.length; i <= len; i++) { 770 var nLimit = 0; 771 772 switch (nCorrectLevel) { 773 case QRErrorCorrectLevel.L : 774 nLimit = QRCodeLimitLength[i][0]; 775 break; 776 case QRErrorCorrectLevel.M : 777 nLimit = QRCodeLimitLength[i][1]; 778 break; 779 case QRErrorCorrectLevel.Q : 780 nLimit = QRCodeLimitLength[i][2]; 781 break; 782 case QRErrorCorrectLevel.H : 783 nLimit = QRCodeLimitLength[i][3]; 784 break; 785 } 786 787 if (length <= nLimit) { 788 break; 789 } else { 790 nType++; 791 } 792 } 793 794 if (nType > QRCodeLimitLength.length) { 795 throw new Error("Too long data"); 796 } 797 798 return nType; 799 } 800 801 function _getUTF8Length(sText) { 802 var replacedText = encodeURI(sText).toString().replace(/\%[0-9a-fA-F]{2}/g, 'a'); 803 return replacedText.length + (replacedText.length != sText ? 3 : 0); 804 } 805 806 /** 807 * @class QRCode 808 * @constructor 809 * @example 810 * new QRCode(document.getElementById("test"), "http://jindo.dev.naver.com/collie"); 811 * 812 * @example 813 * var oQRCode = new QRCode("test", { 814 * text : "http://naver.com", 815 * width : 128, 816 * height : 128 817 * }); 818 * 819 * oQRCode.clear(); // Clear the QRCode. 820 * oQRCode.makeCode("http://map.naver.com"); // Re-create the QRCode. 821 * 822 * @param {HTMLElement|String} el target element or 'id' attribute of element. 823 * @param {Object|String} vOption 824 * @param {String} vOption.text QRCode link data 825 * @param {Number} [vOption.width=256] 826 * @param {Number} [vOption.height=256] 827 * @param {String} [vOption.colorDark="#000000"] 828 * @param {String} [vOption.colorLight="#ffffff"] 829 * @param {QRCode.CorrectLevel} [vOption.correctLevel=QRCode.CorrectLevel.H] [L|M|Q|H] 830 */ 831 QRCode = function (el, vOption) { 832 this._htOption = { 833 width : 256, 834 height : 256, 835 typeNumber : 4, 836 colorDark : "#000000", 837 colorLight : "#ffffff", 838 correctLevel : QRErrorCorrectLevel.H 839 }; 840 841 if (typeof vOption === 'string') { 842 vOption = { 843 text : vOption 844 }; 845 } 846 847 // Overwrites options 848 if (vOption) { 849 for (var i in vOption) { 850 this._htOption[i] = vOption[i]; 851 } 852 } 853 854 if (typeof el == "string") { 855 el = document.getElementById(el); 856 } 857 858 this._android = _getAndroid(); 859 this._el = el; 860 this._oQRCode = null; 861 this._oDrawing = new Drawing(this._el, this._htOption); 862 863 if (this._htOption.text) { 864 this.makeCode(this._htOption.text); 865 } 866 }; 867 868 /** 869 * Make the QRCode 870 * 871 * @param {String} sText link data 872 */ 873 QRCode.prototype.makeCode = function (sText) { 874 this._oQRCode = new QRCodeModel(_getTypeNumber(sText, this._htOption.correctLevel), this._htOption.correctLevel); 875 this._oQRCode.addData(sText); 876 this._oQRCode.make(); 877 this._el.title = sText; 878 this._oDrawing.draw(this._oQRCode); 879 this.makeImage(); 880 }; 881 882 /** 883 * Make the Image from Canvas element 884 * - It occurs automatically 885 * - Android below 3 doesn't support Data-URI spec. 886 * 887 * @private 888 */ 889 QRCode.prototype.makeImage = function () { 890 if (typeof this._oDrawing.makeImage == "function" && (!this._android || this._android >= 3)) { 891 this._oDrawing.makeImage(); 892 } 893 }; 894 895 /** 896 * Clear the QRCode 897 */ 898 QRCode.prototype.clear = function () { 899 this._el.innerHTML = ''; 900 this._oDrawing.clear(); 901 }; 902 903 /** 904 * @name QRCode.CorrectLevel 905 */ 906 QRCode.CorrectLevel = QRErrorCorrectLevel; 907 })();
另外，推荐使用 JsBarcode 生成条形码，也是纯js，不依赖jquery，非常方便！