diff --git a/README b/Makefile similarity index 100% rename from README rename to Makefile diff --git a/README.md b/README.md new file mode 100644 index 0000000..45f87c0 --- /dev/null +++ b/README.md @@ -0,0 +1,8 @@ +# jQuery.qrcode.js + +with jQuery.qrcode.js you can easily add qrcode to your webpages. + + jQuery("#container").qrcode("this plugin is great") + +It is standalone, no external services which go on and off, or add latency +while loading. \ No newline at end of file diff --git a/examples/index.html b/examples/index.html new file mode 100644 index 0000000..e6bbbcb --- /dev/null +++ b/examples/index.html @@ -0,0 +1,44 @@ + + +Petite démo de QRCode + + + + + + + + +

Un petit message

+
+
+ +

L'URL de mon site

+
+
+ + + +
+Note: pour lire ceci depuis Android, je recommande l'application Bar Code Scanner de ZXing Team. + + + + + +
+ + + + diff --git a/jquery.qrcode.js b/jquery.qrcode.js deleted file mode 100644 index a33a788..0000000 --- a/jquery.qrcode.js +++ /dev/null @@ -1,34 +0,0 @@ -(function( $ ){ - $.fn.qrcode = function(options) { - - var createCanvas = function(text, typeNumber){ - var tileW = 4; - - // create the qrcode itself - var qrcode = new QRCode(typeNumber, QRErrorCorrectLevel.H); - qrcode.addData(text); - qrcode.make(); - - // create canvas element - var canvas = document.createElement('canvas'); - canvas.width = canvas.height = qrcode.getModuleCount()*tileW; - var ctx = canvas.getContext('2d'); - - for( var row = 0; row < qrcode.getModuleCount(); row++ ){ - for( var col = 0; col < qrcode.getModuleCount(); col++ ){ - ctx.fillStyle = qrcode.isDark(row, col) ? "#000000" : "#ffffff"; - ctx.fillRect( col*tileW, row*tileW, tileW, tileW ); - } - } - // return just built canvas - return canvas; - } - - return this.each(function(){ - var $this = $(this); - - var canvas = createCanvas("http://jetienne.com", 4); - jQuery(canvas).appendTo($this); - }); - }; -})( jQuery ); \ No newline at end of file diff --git a/src/jquery.qrcode.js b/src/jquery.qrcode.js new file mode 100644 index 0000000..d99e613 --- /dev/null +++ b/src/jquery.qrcode.js @@ -0,0 +1,47 @@ +(function( $ ){ + $.fn.qrcode = function(options) { + + // if options is string, + if( typeof options === 'string' ){ + options = { text: options }; + } + + // set default values + options = $.extend( {}, { + width : 256, + height : 256, + typeNumber : 4, + correctLevel : QRErrorCorrectLevel.H + }, options); + + var createCanvas = function(){ + // create the qrcode itself + var qrcode = new QRCode(options.typeNumber, options.correctLevel); + qrcode.addData(options.text); + qrcode.make(); + + // create canvas element + var canvas = document.createElement('canvas'); + canvas.width = options.width; + canvas.height = options.height; + var ctx = canvas.getContext('2d'); + + var tileW = options.width / qrcode.getModuleCount(); + var tileH = options.height / qrcode.getModuleCount(); + + for( var row = 0; row < qrcode.getModuleCount(); row++ ){ + for( var col = 0; col < qrcode.getModuleCount(); col++ ){ + ctx.fillStyle = qrcode.isDark(row, col) ? "#000000" : "#ffffff"; + ctx.fillRect( col*tileW, row*tileH, tileW, tileH ); + } + } + // return just built canvas + return canvas; + } + + return this.each(function(){ + var canvas = createCanvas(); + jQuery(canvas).appendTo(this); + }); + }; +})( jQuery ); \ No newline at end of file diff --git a/src/qrcode.js b/src/qrcode.js new file mode 100644 index 0000000..af6d295 --- /dev/null +++ b/src/qrcode.js @@ -0,0 +1,1035 @@ +//--------------------------------------------------------------------- +// QRCode for JavaScript +// +// Copyright (c) 2009 Kazuhiko Arase +// +// URL: http://www.d-project.com/ +// +// Licensed under the MIT license: +// http://www.opensource.org/licenses/mit-license.php +// +// The word "QR Code" is registered trademark of +// DENSO WAVE INCORPORATED +// http://www.denso-wave.com/qrcode/faqpatent-e.html +// +//--------------------------------------------------------------------- + +//--------------------------------------------------------------------- +// QR8bitByte +//--------------------------------------------------------------------- + +function QR8bitByte(data) { + this.mode = QRMode.MODE_8BIT_BYTE; + this.data = data; +} + +QR8bitByte.prototype = { + + getLength : function(buffer) { + return this.data.length; + }, + + write : function(buffer) { + for (var i = 0; i < this.data.length; i++) { + // not JIS ... + buffer.put(this.data.charCodeAt(i), 8); + } + } +}; + +//--------------------------------------------------------------------- +// QRCode +//--------------------------------------------------------------------- + +function QRCode(typeNumber, errorCorrectLevel) { + this.typeNumber = typeNumber; + this.errorCorrectLevel = errorCorrectLevel; + this.modules = null; + this.moduleCount = 0; + this.dataCache = null; + this.dataList = new Array(); +} + +QRCode.prototype = { + + addData : function(data) { + var newData = new QR8bitByte(data); + this.dataList.push(newData); + this.dataCache = null; + }, + + isDark : function(row, col) { + if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) { + throw new Error(row + "," + col); + } + return this.modules[row][col]; + }, + + getModuleCount : function() { + return this.moduleCount; + }, + + make : function() { + this.makeImpl(false, this.getBestMaskPattern() ); + }, + + makeImpl : function(test, maskPattern) { + + this.moduleCount = this.typeNumber * 4 + 17; + this.modules = new Array(this.moduleCount); + + for (var row = 0; row < this.moduleCount; row++) { + + this.modules[row] = new Array(this.moduleCount); + + for (var col = 0; col < this.moduleCount; col++) { + this.modules[row][col] = null;//(col + row) % 3; + } + } + + this.setupPositionProbePattern(0, 0); + this.setupPositionProbePattern(this.moduleCount - 7, 0); + this.setupPositionProbePattern(0, this.moduleCount - 7); + this.setupPositionAdjustPattern(); + this.setupTimingPattern(); + this.setupTypeInfo(test, maskPattern); + + if (this.typeNumber >= 7) { + this.setupTypeNumber(test); + } + + if (this.dataCache == null) { + this.dataCache = QRCode.createData(this.typeNumber, this.errorCorrectLevel, this.dataList); + } + + this.mapData(this.dataCache, maskPattern); + }, + + setupPositionProbePattern : function(row, col) { + + for (var r = -1; r <= 7; r++) { + + if (row + r <= -1 || this.moduleCount <= row + r) continue; + + for (var c = -1; c <= 7; c++) { + + if (col + c <= -1 || this.moduleCount <= col + c) continue; + + if ( (0 <= r && r <= 6 && (c == 0 || c == 6) ) + || (0 <= c && c <= 6 && (r == 0 || r == 6) ) + || (2 <= r && r <= 4 && 2 <= c && c <= 4) ) { + this.modules[row + r][col + c] = true; + } else { + this.modules[row + r][col + c] = false; + } + } + } + }, + + getBestMaskPattern : function() { + + var minLostPoint = 0; + var pattern = 0; + + for (var i = 0; i < 8; i++) { + + this.makeImpl(true, i); + + var lostPoint = QRUtil.getLostPoint(this); + + if (i == 0 || minLostPoint > lostPoint) { + minLostPoint = lostPoint; + pattern = i; + } + } + + return pattern; + }, + + createMovieClip : function(target_mc, instance_name, depth) { + + var qr_mc = target_mc.createEmptyMovieClip(instance_name, depth); + var cs = 1; + + this.make(); + + for (var row = 0; row < this.modules.length; row++) { + + var y = row * cs; + + for (var col = 0; col < this.modules[row].length; col++) { + + var x = col * cs; + var dark = this.modules[row][col]; + + if (dark) { + qr_mc.beginFill(0, 100); + qr_mc.moveTo(x, y); + qr_mc.lineTo(x + cs, y); + qr_mc.lineTo(x + cs, y + cs); + qr_mc.lineTo(x, y + cs); + qr_mc.endFill(); + } + } + } + + return qr_mc; + }, + + setupTimingPattern : function() { + + for (var r = 8; r < this.moduleCount - 8; r++) { + if (this.modules[r][6] != null) { + continue; + } + this.modules[r][6] = (r % 2 == 0); + } + + for (var c = 8; c < this.moduleCount - 8; c++) { + if (this.modules[6][c] != null) { + continue; + } + this.modules[6][c] = (c % 2 == 0); + } + }, + + setupPositionAdjustPattern : function() { + + var pos = QRUtil.getPatternPosition(this.typeNumber); + + for (var i = 0; i < pos.length; i++) { + + for (var j = 0; j < pos.length; j++) { + + var row = pos[i]; + var col = pos[j]; + + if (this.modules[row][col] != null) { + continue; + } + + for (var r = -2; r <= 2; r++) { + + for (var c = -2; c <= 2; c++) { + + if (r == -2 || r == 2 || c == -2 || c == 2 + || (r == 0 && c == 0) ) { + this.modules[row + r][col + c] = true; + } else { + this.modules[row + r][col + c] = false; + } + } + } + } + } + }, + + setupTypeNumber : function(test) { + + var bits = QRUtil.getBCHTypeNumber(this.typeNumber); + + for (var i = 0; i < 18; i++) { + var mod = (!test && ( (bits >> i) & 1) == 1); + this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod; + } + + for (var i = 0; i < 18; i++) { + var mod = (!test && ( (bits >> i) & 1) == 1); + this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod; + } + }, + + setupTypeInfo : function(test, maskPattern) { + + var data = (this.errorCorrectLevel << 3) | maskPattern; + var bits = QRUtil.getBCHTypeInfo(data); + + // vertical + for (var i = 0; i < 15; i++) { + + var mod = (!test && ( (bits >> i) & 1) == 1); + + if (i < 6) { + this.modules[i][8] = mod; + } else if (i < 8) { + this.modules[i + 1][8] = mod; + } else { + this.modules[this.moduleCount - 15 + i][8] = mod; + } + } + + // horizontal + for (var i = 0; i < 15; i++) { + + var mod = (!test && ( (bits >> i) & 1) == 1); + + if (i < 8) { + this.modules[8][this.moduleCount - i - 1] = mod; + } else if (i < 9) { + this.modules[8][15 - i - 1 + 1] = mod; + } else { + this.modules[8][15 - i - 1] = mod; + } + } + + // fixed module + this.modules[this.moduleCount - 8][8] = (!test); + + }, + + mapData : function(data, maskPattern) { + + var inc = -1; + var row = this.moduleCount - 1; + var bitIndex = 7; + var byteIndex = 0; + + for (var col = this.moduleCount - 1; col > 0; col -= 2) { + + if (col == 6) col--; + + while (true) { + + for (var c = 0; c < 2; c++) { + + if (this.modules[row][col - c] == null) { + + var dark = false; + + if (byteIndex < data.length) { + dark = ( ( (data[byteIndex] >>> bitIndex) & 1) == 1); + } + + var mask = QRUtil.getMask(maskPattern, row, col - c); + + if (mask) { + dark = !dark; + } + + this.modules[row][col - c] = dark; + bitIndex--; + + if (bitIndex == -1) { + byteIndex++; + bitIndex = 7; + } + } + } + + row += inc; + + if (row < 0 || this.moduleCount <= row) { + row -= inc; + inc = -inc; + break; + } + } + } + + } + +}; + +QRCode.PAD0 = 0xEC; +QRCode.PAD1 = 0x11; + +QRCode.createData = function(typeNumber, errorCorrectLevel, dataList) { + + var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel); + + var buffer = new QRBitBuffer(); + + for (var i = 0; i < dataList.length; i++) { + var data = dataList[i]; + buffer.put(data.mode, 4); + buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber) ); + data.write(buffer); + } + + // calc num max data. + var totalDataCount = 0; + for (var i = 0; i < rsBlocks.length; i++) { + totalDataCount += rsBlocks[i].dataCount; + } + + if (buffer.getLengthInBits() > totalDataCount * 8) { + throw new Error("code length overflow. (" + + buffer.getLengthInBits() + + ">" + + totalDataCount * 8 + + ")"); + } + + // end code + if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) { + buffer.put(0, 4); + } + + // padding + while (buffer.getLengthInBits() % 8 != 0) { + buffer.putBit(false); + } + + // padding + while (true) { + + if (buffer.getLengthInBits() >= totalDataCount * 8) { + break; + } + buffer.put(QRCode.PAD0, 8); + + if (buffer.getLengthInBits() >= totalDataCount * 8) { + break; + } + buffer.put(QRCode.PAD1, 8); + } + + return QRCode.createBytes(buffer, rsBlocks); +} + +QRCode.createBytes = function(buffer, rsBlocks) { + + var offset = 0; + + var maxDcCount = 0; + var maxEcCount = 0; + + var dcdata = new Array(rsBlocks.length); + var ecdata = new Array(rsBlocks.length); + + for (var r = 0; r < rsBlocks.length; r++) { + + var dcCount = rsBlocks[r].dataCount; + var ecCount = rsBlocks[r].totalCount - dcCount; + + maxDcCount = Math.max(maxDcCount, dcCount); + maxEcCount = Math.max(maxEcCount, ecCount); + + dcdata[r] = new Array(dcCount); + + for (var i = 0; i < dcdata[r].length; i++) { + dcdata[r][i] = 0xff & buffer.buffer[i + offset]; + } + offset += dcCount; + + var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount); + var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1); + + var modPoly = rawPoly.mod(rsPoly); + ecdata[r] = new Array(rsPoly.getLength() - 1); + for (var i = 0; i < ecdata[r].length; i++) { + var modIndex = i + modPoly.getLength() - ecdata[r].length; + ecdata[r][i] = (modIndex >= 0)? modPoly.get(modIndex) : 0; + } + + } + + var totalCodeCount = 0; + for (var i = 0; i < rsBlocks.length; i++) { + totalCodeCount += rsBlocks[i].totalCount; + } + + var data = new Array(totalCodeCount); + var index = 0; + + for (var i = 0; i < maxDcCount; i++) { + for (var r = 0; r < rsBlocks.length; r++) { + if (i < dcdata[r].length) { + data[index++] = dcdata[r][i]; + } + } + } + + for (var i = 0; i < maxEcCount; i++) { + for (var r = 0; r < rsBlocks.length; r++) { + if (i < ecdata[r].length) { + data[index++] = ecdata[r][i]; + } + } + } + + return data; + +} + +//--------------------------------------------------------------------- +// QRMode +//--------------------------------------------------------------------- + +var QRMode = { + MODE_NUMBER : 1 << 0, + MODE_ALPHA_NUM : 1 << 1, + MODE_8BIT_BYTE : 1 << 2, + MODE_KANJI : 1 << 3 +}; + +//--------------------------------------------------------------------- +// QRErrorCorrectLevel +//--------------------------------------------------------------------- + +var QRErrorCorrectLevel = { + L : 1, + M : 0, + Q : 3, + H : 2 +}; + +//--------------------------------------------------------------------- +// QRMaskPattern +//--------------------------------------------------------------------- + +var QRMaskPattern = { + PATTERN000 : 0, + PATTERN001 : 1, + PATTERN010 : 2, + PATTERN011 : 3, + PATTERN100 : 4, + PATTERN101 : 5, + PATTERN110 : 6, + PATTERN111 : 7 +}; + +//--------------------------------------------------------------------- +// QRUtil +//--------------------------------------------------------------------- + +var QRUtil = { + + PATTERN_POSITION_TABLE : [ + [], + [6, 18], + [6, 22], + [6, 26], + [6, 30], + [6, 34], + [6, 22, 38], + [6, 24, 42], + [6, 26, 46], + [6, 28, 50], + [6, 30, 54], + [6, 32, 58], + [6, 34, 62], + [6, 26, 46, 66], + [6, 26, 48, 70], + [6, 26, 50, 74], + [6, 30, 54, 78], + [6, 30, 56, 82], + [6, 30, 58, 86], + [6, 34, 62, 90], + [6, 28, 50, 72, 94], + [6, 26, 50, 74, 98], + [6, 30, 54, 78, 102], + [6, 28, 54, 80, 106], + [6, 32, 58, 84, 110], + [6, 30, 58, 86, 114], + [6, 34, 62, 90, 118], + [6, 26, 50, 74, 98, 122], + [6, 30, 54, 78, 102, 126], + [6, 26, 52, 78, 104, 130], + [6, 30, 56, 82, 108, 134], + [6, 34, 60, 86, 112, 138], + [6, 30, 58, 86, 114, 142], + [6, 34, 62, 90, 118, 146], + [6, 30, 54, 78, 102, 126, 150], + [6, 24, 50, 76, 102, 128, 154], + [6, 28, 54, 80, 106, 132, 158], + [6, 32, 58, 84, 110, 136, 162], + [6, 26, 54, 82, 110, 138, 166], + [6, 30, 58, 86, 114, 142, 170] + ], + + G15 : (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0), + G18 : (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0), + G15_MASK : (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1), + + getBCHTypeInfo : function(data) { + var d = data << 10; + while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) { + d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) ) ); + } + return ( (data << 10) | d) ^ QRUtil.G15_MASK; + }, + + getBCHTypeNumber : function(data) { + var d = data << 12; + while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) { + d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) ) ); + } + return (data << 12) | d; + }, + + getBCHDigit : function(data) { + + var digit = 0; + + while (data != 0) { + digit++; + data >>>= 1; + } + + return digit; + }, + + getPatternPosition : function(typeNumber) { + return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1]; + }, + + getMask : function(maskPattern, i, j) { + + switch (maskPattern) { + + case QRMaskPattern.PATTERN000 : return (i + j) % 2 == 0; + case QRMaskPattern.PATTERN001 : return i % 2 == 0; + case QRMaskPattern.PATTERN010 : return j % 3 == 0; + case QRMaskPattern.PATTERN011 : return (i + j) % 3 == 0; + case QRMaskPattern.PATTERN100 : return (Math.floor(i / 2) + Math.floor(j / 3) ) % 2 == 0; + case QRMaskPattern.PATTERN101 : return (i * j) % 2 + (i * j) % 3 == 0; + case QRMaskPattern.PATTERN110 : return ( (i * j) % 2 + (i * j) % 3) % 2 == 0; + case QRMaskPattern.PATTERN111 : return ( (i * j) % 3 + (i + j) % 2) % 2 == 0; + + default : + throw new Error("bad maskPattern:" + maskPattern); + } + }, + + getErrorCorrectPolynomial : function(errorCorrectLength) { + + var a = new QRPolynomial([1], 0); + + for (var i = 0; i < errorCorrectLength; i++) { + a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0) ); + } + + return a; + }, + + getLengthInBits : function(mode, type) { + + if (1 <= type && type < 10) { + + // 1 - 9 + + switch(mode) { + case QRMode.MODE_NUMBER : return 10; + case QRMode.MODE_ALPHA_NUM : return 9; + case QRMode.MODE_8BIT_BYTE : return 8; + case QRMode.MODE_KANJI : return 8; + default : + throw new Error("mode:" + mode); + } + + } else if (type < 27) { + + // 10 - 26 + + switch(mode) { + case QRMode.MODE_NUMBER : return 12; + case QRMode.MODE_ALPHA_NUM : return 11; + case QRMode.MODE_8BIT_BYTE : return 16; + case QRMode.MODE_KANJI : return 10; + default : + throw new Error("mode:" + mode); + } + + } else if (type < 41) { + + // 27 - 40 + + switch(mode) { + case QRMode.MODE_NUMBER : return 14; + case QRMode.MODE_ALPHA_NUM : return 13; + case QRMode.MODE_8BIT_BYTE : return 16; + case QRMode.MODE_KANJI : return 12; + default : + throw new Error("mode:" + mode); + } + + } else { + throw new Error("type:" + type); + } + }, + + getLostPoint : function(qrCode) { + + var moduleCount = qrCode.getModuleCount(); + + var lostPoint = 0; + + // LEVEL1 + + for (var row = 0; row < moduleCount; row++) { + + for (var col = 0; col < moduleCount; col++) { + + var sameCount = 0; + var dark = qrCode.isDark(row, col); + + for (var r = -1; r <= 1; r++) { + + if (row + r < 0 || moduleCount <= row + r) { + continue; + } + + for (var c = -1; c <= 1; c++) { + + if (col + c < 0 || moduleCount <= col + c) { + continue; + } + + if (r == 0 && c == 0) { + continue; + } + + if (dark == qrCode.isDark(row + r, col + c) ) { + sameCount++; + } + } + } + + if (sameCount > 5) { + lostPoint += (3 + sameCount - 5); + } + } + } + + // LEVEL2 + + for (var row = 0; row < moduleCount - 1; row++) { + for (var col = 0; col < moduleCount - 1; col++) { + var count = 0; + if (qrCode.isDark(row, col ) ) count++; + if (qrCode.isDark(row + 1, col ) ) count++; + if (qrCode.isDark(row, col + 1) ) count++; + if (qrCode.isDark(row + 1, col + 1) ) count++; + if (count == 0 || count == 4) { + lostPoint += 3; + } + } + } + + // LEVEL3 + + for (var row = 0; row < moduleCount; row++) { + for (var col = 0; col < moduleCount - 6; col++) { + if (qrCode.isDark(row, col) + && !qrCode.isDark(row, col + 1) + && qrCode.isDark(row, col + 2) + && qrCode.isDark(row, col + 3) + && qrCode.isDark(row, col + 4) + && !qrCode.isDark(row, col + 5) + && qrCode.isDark(row, col + 6) ) { + lostPoint += 40; + } + } + } + + for (var col = 0; col < moduleCount; col++) { + for (var row = 0; row < moduleCount - 6; row++) { + if (qrCode.isDark(row, col) + && !qrCode.isDark(row + 1, col) + && qrCode.isDark(row + 2, col) + && qrCode.isDark(row + 3, col) + && qrCode.isDark(row + 4, col) + && !qrCode.isDark(row + 5, col) + && qrCode.isDark(row + 6, col) ) { + lostPoint += 40; + } + } + } + + // LEVEL4 + + var darkCount = 0; + + for (var col = 0; col < moduleCount; col++) { + for (var row = 0; row < moduleCount; row++) { + if (qrCode.isDark(row, col) ) { + darkCount++; + } + } + } + + var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5; + lostPoint += ratio * 10; + + return lostPoint; + } + +}; + + +//--------------------------------------------------------------------- +// QRMath +//--------------------------------------------------------------------- + +var QRMath = { + + glog : function(n) { + + if (n < 1) { + throw new Error("glog(" + n + ")"); + } + + return QRMath.LOG_TABLE[n]; + }, + + gexp : function(n) { + + while (n < 0) { + n += 255; + } + + while (n >= 256) { + n -= 255; + } + + return QRMath.EXP_TABLE[n]; + }, + + EXP_TABLE : new Array(256), + + LOG_TABLE : new Array(256) + +}; + +for (var i = 0; i < 8; i++) { + QRMath.EXP_TABLE[i] = 1 << i; +} +for (var i = 8; i < 256; i++) { + QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] + ^ QRMath.EXP_TABLE[i - 5] + ^ QRMath.EXP_TABLE[i - 6] + ^ QRMath.EXP_TABLE[i - 8]; +} +for (var i = 0; i < 255; i++) { + QRMath.LOG_TABLE[QRMath.EXP_TABLE[i] ] = i; +} + +//--------------------------------------------------------------------- +// QRPolynomial +//--------------------------------------------------------------------- + +function QRPolynomial(num, shift) { + + if (num.length == undefined) { + throw new Error(num.length + "/" + shift); + } + + var offset = 0; + + while (offset < num.length && num[offset] == 0) { + offset++; + } + + this.num = new Array(num.length - offset + shift); + for (var i = 0; i < num.length - offset; i++) { + this.num[i] = num[i + offset]; + } +} + +QRPolynomial.prototype = { + + get : function(index) { + return this.num[index]; + }, + + getLength : function() { + return this.num.length; + }, + + multiply : function(e) { + + var num = new Array(this.getLength() + e.getLength() - 1); + + for (var i = 0; i < this.getLength(); i++) { + for (var j = 0; j < e.getLength(); j++) { + num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i) ) + QRMath.glog(e.get(j) ) ); + } + } + + return new QRPolynomial(num, 0); + }, + + mod : function(e) { + + if (this.getLength() - e.getLength() < 0) { + return this; + } + + var ratio = QRMath.glog(this.get(0) ) - QRMath.glog(e.get(0) ); + + var num = new Array(this.getLength() ); + + for (var i = 0; i < this.getLength(); i++) { + num[i] = this.get(i); + } + + for (var i = 0; i < e.getLength(); i++) { + num[i] ^= QRMath.gexp(QRMath.glog(e.get(i) ) + ratio); + } + + // recursive call + return new QRPolynomial(num, 0).mod(e); + } +}; + +//--------------------------------------------------------------------- +// QRRSBlock +//--------------------------------------------------------------------- + +function QRRSBlock(totalCount, dataCount) { + this.totalCount = totalCount; + this.dataCount = dataCount; +} + +QRRSBlock.RS_BLOCK_TABLE = [ + + // L + // M + // Q + // H + + // 1 + [1, 26, 19], + [1, 26, 16], + [1, 26, 13], + [1, 26, 9], + + // 2 + [1, 44, 34], + [1, 44, 28], + [1, 44, 22], + [1, 44, 16], + + // 3 + [1, 70, 55], + [1, 70, 44], + [2, 35, 17], + [2, 35, 13], + + // 4 + [1, 100, 80], + [2, 50, 32], + [2, 50, 24], + [4, 25, 9], + + // 5 + [1, 134, 108], + [2, 67, 43], + [2, 33, 15, 2, 34, 16], + [2, 33, 11, 2, 34, 12], + + // 6 + [2, 86, 68], + [4, 43, 27], + [4, 43, 19], + [4, 43, 15], + + // 7 + [2, 98, 78], + [4, 49, 31], + [2, 32, 14, 4, 33, 15], + [4, 39, 13, 1, 40, 14], + + // 8 + [2, 121, 97], + [2, 60, 38, 2, 61, 39], + [4, 40, 18, 2, 41, 19], + [4, 40, 14, 2, 41, 15], + + // 9 + [2, 146, 116], + [3, 58, 36, 2, 59, 37], + [4, 36, 16, 4, 37, 17], + [4, 36, 12, 4, 37, 13], + + // 10 + [2, 86, 68, 2, 87, 69], + [4, 69, 43, 1, 70, 44], + [6, 43, 19, 2, 44, 20], + [6, 43, 15, 2, 44, 16] + +]; + +QRRSBlock.getRSBlocks = function(typeNumber, errorCorrectLevel) { + + var rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel); + + if (rsBlock == undefined) { + throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel); + } + + var length = rsBlock.length / 3; + + var list = new Array(); + + for (var i = 0; i < length; i++) { + + var count = rsBlock[i * 3 + 0]; + var totalCount = rsBlock[i * 3 + 1]; + var dataCount = rsBlock[i * 3 + 2]; + + for (var j = 0; j < count; j++) { + list.push(new QRRSBlock(totalCount, dataCount) ); + } + } + + return list; +} + +QRRSBlock.getRsBlockTable = function(typeNumber, errorCorrectLevel) { + + switch(errorCorrectLevel) { + case QRErrorCorrectLevel.L : + return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0]; + case QRErrorCorrectLevel.M : + return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1]; + case QRErrorCorrectLevel.Q : + return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2]; + case QRErrorCorrectLevel.H : + return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3]; + default : + return undefined; + } +} + +//--------------------------------------------------------------------- +// QRBitBuffer +//--------------------------------------------------------------------- + +function QRBitBuffer() { + this.buffer = new Array(); + this.length = 0; +} + +QRBitBuffer.prototype = { + + get : function(index) { + var bufIndex = Math.floor(index / 8); + return ( (this.buffer[bufIndex] >>> (7 - index % 8) ) & 1) == 1; + }, + + put : function(num, length) { + for (var i = 0; i < length; i++) { + this.putBit( ( (num >>> (length - i - 1) ) & 1) == 1); + } + }, + + getLengthInBits : function() { + return this.length; + }, + + putBit : function(bit) { + + var bufIndex = Math.floor(this.length / 8); + if (this.buffer.length <= bufIndex) { + this.buffer.push(0); + } + + if (bit) { + this.buffer[bufIndex] |= (0x80 >>> (this.length % 8) ); + } + + this.length++; + } +};