import math #from PIL import Image, ImageDraw #QRCode for Python # #Ported from the Javascript library by Sam Curren # #QRCode for Javascript #http://d-project.googlecode.com/svn/trunk/misc/qrcode/js/qrcode.js # #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 class QR8bitByte: def __init__(self, data): self.mode = QRMode.MODE_8BIT_BYTE self.data = data def getLength(self): return len(self.data) def write(self, buffer): for i in range(len(self.data)): #// not JIS ... buffer.put(ord(self.data[i]), 8) def __repr__(self): return self.data class QRCode: def __init__(self, typeNumber, errorCorrectLevel): self.typeNumber = typeNumber self.errorCorrectLevel = errorCorrectLevel self.modules = None self.moduleCount = 0 self.dataCache = None self.dataList = [] def addData(self, data): newData = QR8bitByte(data) self.dataList.append(newData) self.dataCache = None def isDark(self, row, col): if (row < 0 or self.moduleCount <= row or col < 0 or self.moduleCount <= col): raise Exception("%s,%s - %s" % (row, col, self.moduleCount)) return self.modules[row][col] def getModuleCount(self): return self.moduleCount def make(self): self.makeImpl(False, self.getBestMaskPattern() ) def makeImpl(self, test, maskPattern): self.moduleCount = self.typeNumber * 4 + 17 self.modules = [None for x in range(self.moduleCount)] for row in range(self.moduleCount): self.modules[row] = [None for x in range(self.moduleCount)] for col in range(self.moduleCount): self.modules[row][col] = None #//(col + row) % 3; self.setupPositionProbePattern(0, 0) self.setupPositionProbePattern(self.moduleCount - 7, 0) self.setupPositionProbePattern(0, self.moduleCount - 7) self.setupPositionAdjustPattern() self.setupTimingPattern() self.setupTypeInfo(test, maskPattern) if (self.typeNumber >= 7): self.setupTypeNumber(test) if (self.dataCache == None): self.dataCache = QRCode.createData(self.typeNumber, self.errorCorrectLevel, self.dataList) self.mapData(self.dataCache, maskPattern) def setupPositionProbePattern(self, row, col): for r in range(-1, 8): if (row + r <= -1 or self.moduleCount <= row + r): continue for c in range(-1, 8): if (col + c <= -1 or self.moduleCount <= col + c): continue if ( (0 <= r and r <= 6 and (c == 0 or c == 6) ) or (0 <= c and c <= 6 and (r == 0 or r == 6) ) or (2 <= r and r <= 4 and 2 <= c and c <= 4) ): self.modules[row + r][col + c] = True; else: self.modules[row + r][col + c] = False; def getBestMaskPattern(self): minLostPoint = 0 pattern = 0 for i in range(8): self.makeImpl(True, i); lostPoint = QRUtil.getLostPoint(self); if (i == 0 or minLostPoint > lostPoint): minLostPoint = lostPoint pattern = i return pattern def setupTimingPattern(self): for r in range(8, self.moduleCount - 8): if (self.modules[r][6] != None): continue self.modules[r][6] = (r % 2 == 0) for c in range(8, self.moduleCount - 8): if (self.modules[6][c] != None): continue self.modules[6][c] = (c % 2 == 0) def setupPositionAdjustPattern(self): pos = QRUtil.getPatternPosition(self.typeNumber) for i in range(len(pos)): for j in range(len(pos)): row = pos[i] col = pos[j] if (self.modules[row][col] != None): continue for r in range(-2, 3): for c in range(-2, 3): if (r == -2 or r == 2 or c == -2 or c == 2 or (r == 0 and c == 0) ): self.modules[row + r][col + c] = True else: self.modules[row + r][col + c] = False def setupTypeNumber(self, test): bits = QRUtil.getBCHTypeNumber(self.typeNumber) for i in range(18): mod = (not test and ( (bits >> i) & 1) == 1) self.modules[i // 3][i % 3 + self.moduleCount - 8 - 3] = mod; for i in range(18): mod = (not test and ( (bits >> i) & 1) == 1) self.modules[i % 3 + self.moduleCount - 8 - 3][i // 3] = mod; def setupTypeInfo(self, test, maskPattern): data = (self.errorCorrectLevel << 3) | maskPattern bits = QRUtil.getBCHTypeInfo(data) #// vertical for i in range(15): mod = (not test and ( (bits >> i) & 1) == 1) if (i < 6): self.modules[i][8] = mod elif (i < 8): self.modules[i + 1][8] = mod else: self.modules[self.moduleCount - 15 + i][8] = mod #// horizontal for i in range(15): mod = (not test and ( (bits >> i) & 1) == 1); if (i < 8): self.modules[8][self.moduleCount - i - 1] = mod elif (i < 9): self.modules[8][15 - i - 1 + 1] = mod else: self.modules[8][15 - i - 1] = mod #// fixed module self.modules[self.moduleCount - 8][8] = (not test) def mapData(self, data, maskPattern): inc = -1 row = self.moduleCount - 1 bitIndex = 7 byteIndex = 0 for col in range(self.moduleCount - 1, 0, -2): if (col == 6): col-=1 while (True): for c in range(2): if (self.modules[row][col - c] == None): dark = False if (byteIndex < len(data)): dark = ( ( (data[byteIndex] >> bitIndex) & 1) == 1) mask = QRUtil.getMask(maskPattern, row, col - c) if (mask): dark = not dark self.modules[row][col - c] = dark bitIndex-=1 if (bitIndex == -1): byteIndex+=1 bitIndex = 7 row += inc if (row < 0 or self.moduleCount <= row): row -= inc inc = -inc break PAD0 = 0xEC PAD1 = 0x11 @staticmethod def createData(typeNumber, errorCorrectLevel, dataList): rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel) buffer = QRBitBuffer(); for i in range(len(dataList)): data = dataList[i] buffer.put(data.mode, 4) buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber) ) data.write(buffer) #// calc num max data. totalDataCount = 0; for i in range(len(rsBlocks)): totalDataCount += rsBlocks[i].dataCount if (buffer.getLengthInBits() > totalDataCount * 8): raise Exception("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) @staticmethod def createBytes(buffer, rsBlocks): offset = 0 maxDcCount = 0 maxEcCount = 0 dcdata = [0 for x in range(len(rsBlocks))] ecdata = [0 for x in range(len(rsBlocks))] for r in range(len(rsBlocks)): dcCount = rsBlocks[r].dataCount ecCount = rsBlocks[r].totalCount - dcCount maxDcCount = max(maxDcCount, dcCount) maxEcCount = max(maxEcCount, ecCount) dcdata[r] = [0 for x in range(dcCount)] for i in range(len(dcdata[r])): dcdata[r][i] = 0xff & buffer.buffer[i + offset] offset += dcCount rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount) rawPoly = QRPolynomial(dcdata[r], rsPoly.getLength() - 1) modPoly = rawPoly.mod(rsPoly) ecdata[r] = [0 for x in range(rsPoly.getLength()-1)] for i in range(len(ecdata[r])): modIndex = i + modPoly.getLength() - len(ecdata[r]) if (modIndex >= 0): ecdata[r][i] = modPoly.get(modIndex) else: ecdata[r][i] = 0 totalCodeCount = 0 for i in range(len(rsBlocks)): totalCodeCount += rsBlocks[i].totalCount data = [None for x in range(totalCodeCount)] index = 0 for i in range(maxDcCount): for r in range(len(rsBlocks)): if (i < len(dcdata[r])): data[index] = dcdata[r][i] index+=1 for i in range(maxEcCount): for r in range(len(rsBlocks)): if (i < len(ecdata[r])): data[index] = ecdata[r][i] index+=1 return data class QRMode: MODE_NUMBER = 1 << 0 MODE_ALPHA_NUM = 1 << 1 MODE_8BIT_BYTE = 1 << 2 MODE_KANJI = 1 << 3 class QRErrorCorrectLevel: L = 1 M = 0 Q = 3 H = 2 class QRMaskPattern: PATTERN000 = 0 PATTERN001 = 1 PATTERN010 = 2 PATTERN011 = 3 PATTERN100 = 4 PATTERN101 = 5 PATTERN110 = 6 PATTERN111 = 7 class QRUtil(object): 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) @staticmethod def getBCHTypeInfo(data): 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 @staticmethod def getBCHTypeNumber(data): 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 @staticmethod def getBCHDigit(data): digit = 0; while (data != 0): digit += 1 data >>= 1 return digit @staticmethod def getPatternPosition(typeNumber): return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1] @staticmethod def getMask(maskPattern, i, j): if maskPattern == QRMaskPattern.PATTERN000 : return (i + j) % 2 == 0 if maskPattern == QRMaskPattern.PATTERN001 : return i % 2 == 0 if maskPattern == QRMaskPattern.PATTERN010 : return j % 3 == 0 if maskPattern == QRMaskPattern.PATTERN011 : return (i + j) % 3 == 0 if maskPattern == QRMaskPattern.PATTERN100 : return (math.floor(i / 2) + math.floor(j / 3) ) % 2 == 0 if maskPattern == QRMaskPattern.PATTERN101 : return (i * j) % 2 + (i * j) % 3 == 0 if maskPattern == QRMaskPattern.PATTERN110 : return ( (i * j) % 2 + (i * j) % 3) % 2 == 0 if maskPattern == QRMaskPattern.PATTERN111 : return ( (i * j) % 3 + (i + j) % 2) % 2 == 0 raise Exception("bad maskPattern:" + maskPattern); @staticmethod def getErrorCorrectPolynomial(errorCorrectLength): a = QRPolynomial([1], 0); for i in range(errorCorrectLength): a = a.multiply(QRPolynomial([1, QRMath.gexp(i)], 0) ) return a @staticmethod def getLengthInBits(mode, type): if 1 <= type and type < 10: #// 1 - 9 if mode == QRMode.MODE_NUMBER : return 10 if mode == QRMode.MODE_ALPHA_NUM : return 9 if mode == QRMode.MODE_8BIT_BYTE : return 8 if mode == QRMode.MODE_KANJI : return 8 raise Exception("mode:" + mode) elif (type < 27): #// 10 - 26 if mode == QRMode.MODE_NUMBER : return 12 if mode == QRMode.MODE_ALPHA_NUM : return 11 if mode == QRMode.MODE_8BIT_BYTE : return 16 if mode == QRMode.MODE_KANJI : return 10 raise Exception("mode:" + mode) elif (type < 41): #// 27 - 40 if mode == QRMode.MODE_NUMBER : return 14 if mode == QRMode.MODE_ALPHA_NUM : return 13 if mode == QRMode.MODE_8BIT_BYTE : return 16 if mode == QRMode.MODE_KANJI : return 12 raise Exception("mode:" + mode) else: raise Exception("type:" + type) @staticmethod def getLostPoint(qrCode): moduleCount = qrCode.getModuleCount(); lostPoint = 0; #// LEVEL1 for row in range(moduleCount): for col in range(moduleCount): sameCount = 0; dark = qrCode.isDark(row, col); for r in range(-1, 2): if (row + r < 0 or moduleCount <= row + r): continue for c in range(-1, 2): if (col + c < 0 or moduleCount <= col + c): continue if (r == 0 and c == 0): continue if (dark == qrCode.isDark(row + r, col + c) ): sameCount+=1 if (sameCount > 5): lostPoint += (3 + sameCount - 5) #// LEVEL2 for row in range(moduleCount - 1): for col in range(moduleCount - 1): count = 0; if (qrCode.isDark(row, col ) ): count+=1 if (qrCode.isDark(row + 1, col ) ): count+=1 if (qrCode.isDark(row, col + 1) ): count+=1 if (qrCode.isDark(row + 1, col + 1) ): count+=1 if (count == 0 or count == 4): lostPoint += 3 #// LEVEL3 for row in range(moduleCount): for col in range(moduleCount - 6): if (qrCode.isDark(row, col) and not qrCode.isDark(row, col + 1) and qrCode.isDark(row, col + 2) and qrCode.isDark(row, col + 3) and qrCode.isDark(row, col + 4) and not qrCode.isDark(row, col + 5) and qrCode.isDark(row, col + 6) ): lostPoint += 40 for col in range(moduleCount): for row in range(moduleCount - 6): if (qrCode.isDark(row, col) and not qrCode.isDark(row + 1, col) and qrCode.isDark(row + 2, col) and qrCode.isDark(row + 3, col) and qrCode.isDark(row + 4, col) and not qrCode.isDark(row + 5, col) and qrCode.isDark(row + 6, col) ): lostPoint += 40 #// LEVEL4 darkCount = 0; for col in range(moduleCount): for row in range(moduleCount): if (qrCode.isDark(row, col) ): darkCount+=1 ratio = abs(100 * darkCount / moduleCount / moduleCount - 50) / 5 lostPoint += ratio * 10 return lostPoint class QRMath: @staticmethod def glog(n): if (n < 1): raise Exception("glog(" + n + ")") return LOG_TABLE[n]; @staticmethod def gexp(n): while n < 0: n += 255 while n >= 256: n -= 255 return EXP_TABLE[n]; EXP_TABLE = [x for x in range(256)] LOG_TABLE = [x for x in range(256)] for i in range(8): EXP_TABLE[i] = 1 << i; for i in range(8, 256): EXP_TABLE[i] = EXP_TABLE[i - 4] ^ EXP_TABLE[i - 5] ^ EXP_TABLE[i - 6] ^ EXP_TABLE[i - 8] for i in range(255): LOG_TABLE[EXP_TABLE[i] ] = i class QRPolynomial: def __init__(self, num, shift): if (len(num) == 0): raise Exception(num.length + "/" + shift) offset = 0 while offset < len(num) and num[offset] == 0: offset += 1 self.num = [0 for x in range(len(num)-offset+shift)] for i in range(len(num) - offset): self.num[i] = num[i + offset] def get(self, index): return self.num[index] def getLength(self): return len(self.num) def multiply(self, e): num = [0 for x in range(self.getLength() + e.getLength() - 1)]; for i in range(self.getLength()): for j in range(e.getLength()): num[i + j] ^= QRMath.gexp(QRMath.glog(self.get(i) ) + QRMath.glog(e.get(j) ) ) return QRPolynomial(num, 0); def mod(self, e): if (self.getLength() - e.getLength() < 0): return self; ratio = QRMath.glog(self.get(0) ) - QRMath.glog(e.get(0) ) num = [0 for x in range(self.getLength())] for i in range(self.getLength()): num[i] = self.get(i); for i in range(e.getLength()): num[i] ^= QRMath.gexp(QRMath.glog(e.get(i) ) + ratio) # recursive call return QRPolynomial(num, 0).mod(e); class QRRSBlock: RS_BLOCK_TABLE = [ #// L #// M #// Q #// H #// 1 [1, 26, 19], [1, 26, 16], [1, 26, 13], [1, 26, 9], #// 2 [1, 44, 34], [1, 44, 28], [1, 44, 22], [1, 44, 16], #// 3 [1, 70, 55], [1, 70, 44], [2, 35, 17], [2, 35, 13], #// 4 [1, 100, 80], [2, 50, 32], [2, 50, 24], [4, 25, 9], #// 5 [1, 134, 108], [2, 67, 43], [2, 33, 15, 2, 34, 16], [2, 33, 11, 2, 34, 12], #// 6 [2, 86, 68], [4, 43, 27], [4, 43, 19], [4, 43, 15], #// 7 [2, 98, 78], [4, 49, 31], [2, 32, 14, 4, 33, 15], [4, 39, 13, 1, 40, 14], #// 8 [2, 121, 97], [2, 60, 38, 2, 61, 39], [4, 40, 18, 2, 41, 19], [4, 40, 14, 2, 41, 15], #// 9 [2, 146, 116], [3, 58, 36, 2, 59, 37], [4, 36, 16, 4, 37, 17], [4, 36, 12, 4, 37, 13], #// 10 [2, 86, 68, 2, 87, 69], [4, 69, 43, 1, 70, 44], [6, 43, 19, 2, 44, 20], [6, 43, 15, 2, 44, 16], # 11 [4, 101, 81], [1, 80, 50, 4, 81, 51], [4, 50, 22, 4, 51, 23], [3, 36, 12, 8, 37, 13], # 12 [2, 116, 92, 2, 117, 93], [6, 58, 36, 2, 59, 37], [4, 46, 20, 6, 47, 21], [7, 42, 14, 4, 43, 15], # 13 [4, 133, 107], [8, 59, 37, 1, 60, 38], [8, 44, 20, 4, 45, 21], [12, 33, 11, 4, 34, 12], # 14 [3, 145, 115, 1, 146, 116], [4, 64, 40, 5, 65, 41], [11, 36, 16, 5, 37, 17], [11, 36, 12, 5, 37, 13], # 15 [5, 109, 87, 1, 110, 88], [5, 65, 41, 5, 66, 42], [5, 54, 24, 7, 55, 25], [11, 36, 12], # 16 [5, 122, 98, 1, 123, 99], [7, 73, 45, 3, 74, 46], [15, 43, 19, 2, 44, 20], [3, 45, 15, 13, 46, 16], # 17 [1, 135, 107, 5, 136, 108], [10, 74, 46, 1, 75, 47], [1, 50, 22, 15, 51, 23], [2, 42, 14, 17, 43, 15], # 18 [5, 150, 120, 1, 151, 121], [9, 69, 43, 4, 70, 44], [17, 50, 22, 1, 51, 23], [2, 42, 14, 19, 43, 15], # 19 [3, 141, 113, 4, 142, 114], [3, 70, 44, 11, 71, 45], [17, 47, 21, 4, 48, 22], [9, 39, 13, 16, 40, 14], # 20 [3, 135, 107, 5, 136, 108], [3, 67, 41, 13, 68, 42], [15, 54, 24, 5, 55, 25], [15, 43, 15, 10, 44, 16], # 21 [4, 144, 116, 4, 145, 117], [17, 68, 42], [17, 50, 22, 6, 51, 23], [19, 46, 16, 6, 47, 17], # 22 [2, 139, 111, 7, 140, 112], [17, 74, 46], [7, 54, 24, 16, 55, 25], [34, 37, 13], # 23 [4, 151, 121, 5, 152, 122], [4, 75, 47, 14, 76, 48], [11, 54, 24, 14, 55, 25], [16, 45, 15, 14, 46, 16], # 24 [6, 147, 117, 4, 148, 118], [6, 73, 45, 14, 74, 46], [11, 54, 24, 16, 55, 25], [30, 46, 16, 2, 47, 17], # 25 [8, 132, 106, 4, 133, 107], [8, 75, 47, 13, 76, 48], [7, 54, 24, 22, 55, 25], [22, 45, 15, 13, 46, 16], # 26 [10, 142, 114, 2, 143, 115], [19, 74, 46, 4, 75, 47], [28, 50, 22, 6, 51, 23], [33, 46, 16, 4, 47, 17], # 27 [8, 152, 122, 4, 153, 123], [22, 73, 45, 3, 74, 46], [8, 53, 23, 26, 54, 24], [12, 45, 15, 28, 46, 16], # 28 [3, 147, 117, 10, 148, 118], [3, 73, 45, 23, 74, 46], [4, 54, 24, 31, 55, 25], [11, 45, 15, 31, 46, 16], # 29 [7, 146, 116, 7, 147, 117], [21, 73, 45, 7, 74, 46], [1, 53, 23, 37, 54, 24], [19, 45, 15, 26, 46, 16], # 30 [5, 145, 115, 10, 146, 116], [19, 75, 47, 10, 76, 48], [15, 54, 24, 25, 55, 25], [23, 45, 15, 25, 46, 16], # 31 [13, 145, 115, 3, 146, 116], [2, 74, 46, 29, 75, 47], [42, 54, 24, 1, 55, 25], [23, 45, 15, 28, 46, 16], # 32 [17, 145, 115], [10, 74, 46, 23, 75, 47], [10, 54, 24, 35, 55, 25], [19, 45, 15, 35, 46, 16], # 33 [17, 145, 115, 1, 146, 116], [14, 74, 46, 21, 75, 47], [29, 54, 24, 19, 55, 25], [11, 45, 15, 46, 46, 16], # 34 [13, 145, 115, 6, 146, 116], [14, 74, 46, 23, 75, 47], [44, 54, 24, 7, 55, 25], [59, 46, 16, 1, 47, 17], # 35 [12, 151, 121, 7, 152, 122], [12, 75, 47, 26, 76, 48], [39, 54, 24, 14, 55, 25], [22, 45, 15, 41, 46, 16], # 36 [6, 151, 121, 14, 152, 122], [6, 75, 47, 34, 76, 48], [46, 54, 24, 10, 55, 25], [2, 45, 15, 64, 46, 16], # 37 [17, 152, 122, 4, 153, 123], [29, 74, 46, 14, 75, 47], [49, 54, 24, 10, 55, 25], [24, 45, 15, 46, 46, 16], # 38 [4, 152, 122, 18, 153, 123], [13, 74, 46, 32, 75, 47], [48, 54, 24, 14, 55, 25], [42, 45, 15, 32, 46, 16], # 39 [20, 147, 117, 4, 148, 118], [40, 75, 47, 7, 76, 48], [43, 54, 24, 22, 55, 25], [10, 45, 15, 67, 46, 16], # 40 [19, 148, 118, 6, 149, 119], [18, 75, 47, 31, 76, 48], [34, 54, 24, 34, 55, 25], [20, 45, 15, 61, 46, 16] ] def __init__(self, totalCount, dataCount): self.totalCount = totalCount self.dataCount = dataCount @staticmethod def getRSBlocks(typeNumber, errorCorrectLevel): rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel); if rsBlock == None: raise Exception("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel) length = len(rsBlock) / 3 list = [] for i in range(length): count = rsBlock[i * 3 + 0] totalCount = rsBlock[i * 3 + 1] dataCount = rsBlock[i * 3 + 2] for j in range(count): list.append(QRRSBlock(totalCount, dataCount)) return list; @staticmethod def getRsBlockTable(typeNumber, errorCorrectLevel): if errorCorrectLevel == QRErrorCorrectLevel.L: return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0]; elif errorCorrectLevel == QRErrorCorrectLevel.M: return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1]; elif errorCorrectLevel == QRErrorCorrectLevel.Q: return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2]; elif errorCorrectLevel == QRErrorCorrectLevel.H: return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3]; else: return None; class QRBitBuffer: def __init__(self): self.buffer = [] self.length = 0 def __repr__(self): return ".".join([str(n) for n in self.buffer]) def get(self, index): bufIndex = math.floor(index / 8) val = ( (self.buffer[bufIndex] >> (7 - index % 8) ) & 1) == 1 print "get ", val return ( (self.buffer[bufIndex] >> (7 - index % 8) ) & 1) == 1 def put(self, num, length): for i in range(length): self.putBit( ( (num >> (length - i - 1) ) & 1) == 1) def getLengthInBits(self): return self.length def putBit(self, bit): bufIndex = self.length // 8 if len(self.buffer) <= bufIndex: self.buffer.append(0) if bit: self.buffer[bufIndex] |= (0x80 >> (self.length % 8) ) self.length+=1