You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
879 lines
33 KiB
879 lines
33 KiB
/** |
|
* Created by Zheng_Alex on 2017/12/28. |
|
*/ |
|
let QRMode = {MODE_NUMBER: 1 << 0, MODE_ALPHA_NUM: 1 << 1, MODE_8BIT_BYTE: 1 << 2, MODE_KANJI: 1 << 3}, |
|
QRErrorCorrectLevel = {L: 1, M: 0, Q: 3, H: 2}, |
|
QRMaskPattern = { |
|
PATTERN000: 0, |
|
PATTERN001: 1, |
|
PATTERN010: 2, |
|
PATTERN011: 3, |
|
PATTERN100: 4, |
|
PATTERN101: 5, |
|
PATTERN110: 6, |
|
PATTERN111: 7 |
|
}, |
|
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) { |
|
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) { |
|
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) { |
|
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; |
|
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); |
|
} |
|
} |
|
} |
|
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; |
|
} |
|
} |
|
} |
|
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; |
|
} |
|
} |
|
} |
|
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 = { |
|
glog: function (n) { |
|
if (n < 1) { |
|
throw new Error("glog(" + n + ")"); |
|
} |
|
return QRMath.LOG_TABLE[n]; |
|
}, |
|
gexp: function (n) { |
|
while (n < 0) { |
|
n += 255; |
|
} |
|
while (n >= 256) { |
|
n -= 255; |
|
} |
|
return QRMath.EXP_TABLE[n]; |
|
}, |
|
EXP_TABLE: new Array(256), LOG_TABLE: new Array(256) |
|
}; |
|
|
|
for (let i = 0; i < 8; i++) { |
|
QRMath.EXP_TABLE[i] = 1 << i; |
|
} |
|
for (let i = 8; i < 256; i++) { |
|
QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] ^ QRMath.EXP_TABLE[i - 5] ^ QRMath.EXP_TABLE[i - 6] ^ QRMath.EXP_TABLE[i - 8]; |
|
} |
|
for (let i = 0; i < 255; i++) { |
|
QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i; |
|
} |
|
|
|
/* |
|
* class QR8bitByte |
|
* */ |
|
class QR8bitByte { |
|
constructor(data) { |
|
this.mode = QRMode.MODE_8BIT_BYTE; |
|
this.data = data; |
|
this.parsedData = []; |
|
|
|
// Added to support UTF-8 Characters |
|
for (let i = 0, l = this.data.length; i < l; i++) { |
|
let byteArray = [], |
|
code = this.data.charCodeAt(i); |
|
|
|
if (code > 0x10000) { |
|
byteArray[0] = 0xF0 | ((code & 0x1C0000) >>> 18); |
|
byteArray[1] = 0x80 | ((code & 0x3F000) >>> 12); |
|
byteArray[2] = 0x80 | ((code & 0xFC0) >>> 6); |
|
byteArray[3] = 0x80 | (code & 0x3F); |
|
} else if (code > 0x800) { |
|
byteArray[0] = 0xE0 | ((code & 0xF000) >>> 12); |
|
byteArray[1] = 0x80 | ((code & 0xFC0) >>> 6); |
|
byteArray[2] = 0x80 | (code & 0x3F); |
|
} else if (code > 0x80) { |
|
byteArray[0] = 0xC0 | ((code & 0x7C0) >>> 6); |
|
byteArray[1] = 0x80 | (code & 0x3F); |
|
} else { |
|
byteArray[0] = code; |
|
} |
|
|
|
this.parsedData.push(byteArray); |
|
} |
|
|
|
this.parsedData = Array.prototype.concat.apply([], this.parsedData); |
|
|
|
if (this.parsedData.length !== this.data.length) { |
|
this.parsedData.unshift(191); |
|
this.parsedData.unshift(187); |
|
this.parsedData.unshift(239); |
|
} |
|
} |
|
|
|
getLength(buffer) { |
|
return this.parsedData.length; |
|
} |
|
|
|
write(buffer) { |
|
for (let i = 0, l = this.parsedData.length; i < l; i++) { |
|
buffer.put(this.parsedData[i], 8); |
|
} |
|
} |
|
} |
|
|
|
/* |
|
* class QRCodeModel |
|
* */ |
|
class QRCodeModel { |
|
constructor(typeNumber, errorCorrectLevel) { |
|
this.typeNumber = typeNumber; |
|
this.errorCorrectLevel = errorCorrectLevel; |
|
this.modules = null; |
|
this.moduleCount = 0; |
|
this.dataCache = null; |
|
this.dataList = []; |
|
} |
|
|
|
addData(data) { |
|
let newData = new QR8bitByte(data); |
|
this.dataList.push(newData); |
|
this.dataCache = null; |
|
} |
|
|
|
isDark(row, col) { |
|
if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) { |
|
throw new Error(row + ',' + col); |
|
} |
|
return this.modules[row][col]; |
|
} |
|
|
|
getModuleCount() { |
|
return this.moduleCount; |
|
} |
|
|
|
make() { |
|
this.makeImpl(false, this.getBestMaskPattern()); |
|
} |
|
|
|
makeImpl(test, maskPattern) { |
|
this.moduleCount = this.typeNumber * 4 + 17; |
|
this.modules = new Array(this.moduleCount); |
|
|
|
for (let row = 0; row < this.moduleCount; row++) { |
|
this.modules[row] = new Array(this.moduleCount); |
|
for (let col = 0; col < this.moduleCount; col++) { |
|
this.modules[row][col] = null; |
|
} |
|
} |
|
|
|
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 = QRCodeModel.createData(this.typeNumber, this.errorCorrectLevel, this.dataList); |
|
} |
|
this.mapData(this.dataCache, maskPattern); |
|
} |
|
|
|
setupPositionProbePattern(row, col) { |
|
for (let r = -1; r <= 7; r++) { |
|
if (row + r <= -1 || this.moduleCount <= row + r) { |
|
continue; |
|
} |
|
for (let c = -1; c <= 7; c++) { |
|
if (col + c <= -1 || this.moduleCount <= col + c) { |
|
continue; |
|
} |
|
this.modules[row + r][col + c] = (0 <= r && r <= 6 && (c == 0 || c == 6)) |
|
|| (0 <= c && c <= 6 && (r == 0 || r == 6)) || (2 <= r && r <= 4 && 2 <= c && c <= 4) |
|
} |
|
} |
|
} |
|
|
|
getBestMaskPattern() { |
|
let minLostPoint = 0, |
|
pattern = 0; |
|
|
|
for (let i = 0; i < 8; i++) { |
|
this.makeImpl(true, i); |
|
let lostPoint = QRUtil.getLostPoint(this); |
|
if (i == 0 || minLostPoint > lostPoint) { |
|
minLostPoint = lostPoint; |
|
pattern = i; |
|
} |
|
} |
|
|
|
return pattern; |
|
} |
|
|
|
setupTimingPattern() { |
|
for (let r = 8; r < this.moduleCount - 8; r++) { |
|
if (this.modules[r][6] != null) { |
|
continue; |
|
} |
|
this.modules[r][6] = (r % 2 == 0); |
|
} |
|
for (let c = 8; c < this.moduleCount - 8; c++) { |
|
if (this.modules[6][c] != null) { |
|
continue; |
|
} |
|
this.modules[6][c] = (c % 2 == 0); |
|
} |
|
} |
|
|
|
setupPositionAdjustPattern() { |
|
let pos = QRUtil.getPatternPosition(this.typeNumber); |
|
for (let i = 0; i < pos.length; i++) { |
|
for (let j = 0; j < pos.length; j++) { |
|
let row = pos[i], |
|
col = pos[j]; |
|
|
|
if (this.modules[row][col] != null) { |
|
continue; |
|
} |
|
for (let r = -2; r <= 2; r++) { |
|
for (let c = -2; c <= 2; c++) { |
|
this.modules[row + r][col + c] = r == -2 || r == 2 || c == -2 || c == 2 || (r == 0 && c == 0); |
|
} |
|
} |
|
} |
|
} |
|
} |
|
|
|
setupTypeNumber(test) { |
|
let bits = QRUtil.getBCHTypeNumber(this.typeNumber); |
|
|
|
for (let i = 0; i < 18; i++) { |
|
this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = (!test && ((bits >> i) & 1) == 1); |
|
} |
|
|
|
for (let i = 0; i < 18; i++) { |
|
this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = (!test && ((bits >> i) & 1) == 1); |
|
} |
|
} |
|
|
|
setupTypeInfo(test, maskPattern) { |
|
let data = (this.errorCorrectLevel << 3) | maskPattern, |
|
bits = QRUtil.getBCHTypeInfo(data); |
|
|
|
for (let i = 0; i < 15; i++) { |
|
let mod = (!test && ((bits >> i) & 1) == 1); |
|
|
|
if (i < 6) { |
|
this.modules[i][8] = mod; |
|
} else if (i < 8) { |
|
this.modules[i + 1][8] = mod; |
|
} else { |
|
this.modules[this.moduleCount - 15 + i][8] = mod; |
|
} |
|
} |
|
|
|
for (let i = 0; i < 15; i++) { |
|
let mod = (!test && ((bits >> i) & 1) == 1); |
|
|
|
if (i < 8) { |
|
this.modules[8][this.moduleCount - i - 1] = mod; |
|
} else if (i < 9) { |
|
this.modules[8][15 - i - 1 + 1] = mod; |
|
} else { |
|
this.modules[8][15 - i - 1] = mod; |
|
} |
|
} |
|
|
|
this.modules[this.moduleCount - 8][8] = (!test); |
|
} |
|
|
|
mapData(data, maskPattern) { |
|
let inc = -1, |
|
row = this.moduleCount - 1, |
|
bitIndex = 7, |
|
byteIndex = 0; |
|
|
|
for (let col = this.moduleCount - 1; col > 0; col -= 2) { |
|
if (col == 6) col--; |
|
while (true) { |
|
for (let c = 0; c < 2; c++) { |
|
if (this.modules[row][col - c] == null) { |
|
let dark = false; |
|
if (byteIndex < data.length) { |
|
dark = (((data[byteIndex] >>> bitIndex) & 1) == 1); |
|
} |
|
|
|
let mask = QRUtil.getMask(maskPattern, row, col - c); |
|
if (mask) { |
|
dark = !dark; |
|
} |
|
|
|
this.modules[row][col - c] = dark; |
|
bitIndex--; |
|
if (bitIndex == -1) { |
|
byteIndex++; |
|
bitIndex = 7; |
|
} |
|
} |
|
} |
|
row += inc; |
|
if (row < 0 || this.moduleCount <= row) { |
|
row -= inc; |
|
inc = -inc; |
|
break; |
|
} |
|
} |
|
} |
|
} |
|
} |
|
QRCodeModel.PAD0 = 0xEC; |
|
QRCodeModel.PAD1 = 0x11; |
|
QRCodeModel.createData = (typeNumber, errorCorrectLevel, dataList) => { |
|
let rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel), |
|
buffer = new QRBitBuffer(); |
|
|
|
for (let i = 0; i < dataList.length; i++) { |
|
let data = dataList[i]; |
|
buffer.put(data.mode, 4); |
|
buffer.put(data.getLength(), QRUtil.getLengthInBits(data.mode, typeNumber)); |
|
data.write(buffer); |
|
} |
|
|
|
let totalDataCount = 0; |
|
for (let i = 0; i < rsBlocks.length; i++) { |
|
totalDataCount += rsBlocks[i].dataCount; |
|
} |
|
|
|
if (buffer.getLengthInBits() > totalDataCount * 8) { |
|
throw new Error("code length overflow. (" |
|
+ buffer.getLengthInBits() |
|
+ ">" |
|
+ totalDataCount * 8 |
|
+ ")"); |
|
} |
|
|
|
if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) { |
|
buffer.put(0, 4); |
|
} |
|
|
|
while (buffer.getLengthInBits() % 8 != 0) { |
|
buffer.putBit(false); |
|
} |
|
|
|
while (true) { |
|
if (buffer.getLengthInBits() >= totalDataCount * 8) { |
|
break; |
|
} |
|
buffer.put(QRCodeModel.PAD0, 8); |
|
if (buffer.getLengthInBits() >= totalDataCount * 8) { |
|
break; |
|
} |
|
buffer.put(QRCodeModel.PAD1, 8); |
|
} |
|
return QRCodeModel.createBytes(buffer, rsBlocks); |
|
}; |
|
QRCodeModel.createBytes = (buffer, rsBlocks) => { |
|
let offset = 0, |
|
maxDcCount = 0, |
|
maxEcCount = 0, |
|
dcData = new Array(rsBlocks.length), |
|
ecData = new Array(rsBlocks.length); |
|
|
|
for (let r = 0; r < rsBlocks.length; r++) { |
|
let dcCount = rsBlocks[r].dataCount, |
|
ecCount = rsBlocks[r].totalCount - dcCount; |
|
|
|
maxDcCount = Math.max(maxDcCount, dcCount); |
|
maxEcCount = Math.max(maxEcCount, ecCount); |
|
dcData[r] = new Array(dcCount); |
|
|
|
for (let i = 0; i < dcData[r].length; i++) { |
|
dcData[r][i] = 0xff & buffer.buffer[i + offset]; |
|
} |
|
|
|
offset += dcCount; |
|
let rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount), |
|
rawPoly = new QRPolynomial(dcData[r], rsPoly.getLength() - 1), |
|
modPoly = rawPoly.mod(rsPoly); |
|
|
|
ecData[r] = new Array(rsPoly.getLength() - 1); |
|
|
|
for (let i = 0; i < ecData[r].length; i++) { |
|
let modIndex = i + modPoly.getLength() - ecData[r].length; |
|
ecData[r][i] = (modIndex >= 0) ? modPoly.get(modIndex) : 0; |
|
} |
|
} |
|
|
|
let totalCodeCount = 0; |
|
for (let i = 0; i < rsBlocks.length; i++) { |
|
totalCodeCount += rsBlocks[i].totalCount; |
|
} |
|
|
|
let data = new Array(totalCodeCount), |
|
index = 0; |
|
|
|
for (let i = 0; i < maxDcCount; i++) { |
|
for (let r = 0; r < rsBlocks.length; r++) { |
|
if (i < dcData[r].length) { |
|
data[index++] = dcData[r][i]; |
|
} |
|
} |
|
} |
|
|
|
for (let i = 0; i < maxEcCount; i++) { |
|
for (let r = 0; r < rsBlocks.length; r++) { |
|
if (i < ecData[r].length) { |
|
data[index++] = ecData[r][i]; |
|
} |
|
} |
|
} |
|
return data; |
|
}; |
|
|
|
/* |
|
* class QRPolynomial |
|
* */ |
|
class QRPolynomial { |
|
constructor(num, shift) { |
|
if (num.length == undefined) { |
|
throw new Error(num.length + '/' + shift); |
|
} |
|
|
|
let offset = 0; |
|
while (offset < num.length && num[offset] == 0) { |
|
offset++; |
|
} |
|
|
|
this.num = new Array(num.length - offset + shift); |
|
|
|
for (let i = 0; i < num.length - offset; i++) { |
|
this.num[i] = num[i + offset]; |
|
} |
|
} |
|
get(index) { |
|
return this.num[index]; |
|
} |
|
getLength() { |
|
return this.num.length; |
|
} |
|
multiply(e) { |
|
let num = new Array(this.getLength() + e.getLength() - 1); |
|
|
|
for (let i = 0; i < this.getLength(); i++) { |
|
for (let j = 0; j < e.getLength(); j++) { |
|
num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i)) + QRMath.glog(e.get(j))); |
|
} |
|
} |
|
return new QRPolynomial(num, 0); |
|
} |
|
mod(e) { |
|
if (this.getLength() - e.getLength() < 0) { |
|
return this; |
|
} |
|
|
|
let ratio = QRMath.glog(this.get(0)) - QRMath.glog(e.get(0)), |
|
num = new Array(this.getLength()); |
|
|
|
for (let i = 0; i < this.getLength(); i++) { |
|
num[i] = this.get(i); |
|
} |
|
|
|
for (let i = 0; i < e.getLength(); i++) { |
|
num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio); |
|
} |
|
|
|
return new QRPolynomial(num, 0).mod(e); |
|
} |
|
} |
|
|
|
/* |
|
* class QRRSBlock |
|
* */ |
|
class QRRSBlock { |
|
constructor(totalCount, dataCount) { |
|
this.totalCount = totalCount; |
|
this.dataCount = dataCount; |
|
} |
|
} |
|
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) { |
|
let rsBlock = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectLevel); |
|
|
|
if (!rsBlock) { |
|
throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + errorCorrectLevel); |
|
} |
|
|
|
let length = rsBlock.length / 3, |
|
list = []; |
|
|
|
for (let i = 0; i < length; i++) { |
|
let count = rsBlock[i * 3], |
|
totalCount = rsBlock[i * 3 + 1], |
|
dataCount = rsBlock[i * 3 + 2]; |
|
|
|
for (let j = 0; j < count; j++) { |
|
list.push(new QRRSBlock(totalCount, dataCount)); |
|
} |
|
} |
|
return list; |
|
}; |
|
QRRSBlock.getRsBlockTable = function (typeNumber, errorCorrectLevel) { |
|
switch (errorCorrectLevel) { |
|
case QRErrorCorrectLevel.L: |
|
return QRRSBlock.RS_BLOCK_TABLE[(typeNumber - 1) * 4]; |
|
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; |
|
} |
|
}; |
|
|
|
/* |
|
* class QRBitBuffer |
|
* */ |
|
class QRBitBuffer { |
|
constructor() { |
|
this.buffer = []; |
|
this.length = 0; |
|
} |
|
get(index) { |
|
let bufIndex = Math.floor(index / 8); |
|
return ((this.buffer[bufIndex] >>> (7 - index % 8)) & 1) == 1; |
|
} |
|
put(num, length) { |
|
for (let i = 0; i < length; i++) { |
|
this.putBit(((num >>> (length - i - 1)) & 1) == 1); |
|
} |
|
} |
|
getLengthInBits() { |
|
return this.length; |
|
} |
|
putBit(bit) { |
|
let bufIndex = Math.floor(this.length / 8); |
|
|
|
if (this.buffer.length <= bufIndex) { |
|
this.buffer.push(0); |
|
} |
|
|
|
if (bit) { |
|
this.buffer[bufIndex] |= (0x80 >>> (this.length % 8)); |
|
} |
|
this.length++; |
|
} |
|
} |
|
|
|
/* |
|
* Class Drawing |
|
* */ |
|
class Drawing { |
|
constructor(el, opts) { |
|
this._opts = opts; |
|
this._el = el; |
|
this._ctx = wx.createCanvasContext(el); |
|
} |
|
|
|
draw(QRCode) { |
|
let ctx = this._ctx, |
|
opts = this._opts; |
|
|
|
let count = QRCode.getModuleCount(), |
|
width = opts.width / count, |
|
height = opts.height / count, |
|
roundedWidth = Math.round(width), |
|
roundedHeight = Math.round(height); |
|
|
|
this.clear(); |
|
|
|
for (let row = 0; row < count; row++) { |
|
for (let col = 0; col < count; col++) { |
|
let isDark = QRCode.isDark(row, col), |
|
left = col * width, |
|
top = row * height; |
|
|
|
ctx.setStrokeStyle(isDark ? opts.colorDark : opts.colorLight); |
|
ctx.setLineWidth(1); |
|
ctx.setFillStyle(isDark ? opts.colorDark : opts.colorLight); |
|
ctx.fillRect(left, top, width, height); |
|
|
|
ctx.strokeRect( |
|
Math.floor(left) + 0.5, |
|
Math.floor(top) + 0.5, |
|
roundedWidth, |
|
roundedHeight |
|
); |
|
|
|
ctx.strokeRect( |
|
Math.ceil(left) - 0.5, |
|
Math.ceil(top) - 0.5, |
|
roundedWidth, |
|
roundedHeight |
|
); |
|
} |
|
} |
|
ctx.draw(); |
|
this._bIsPainted = true; |
|
} |
|
|
|
clear() { |
|
this._ctx.clearRect(0, 0, this._opts.width, this._opts.height); |
|
} |
|
} |
|
|
|
/* |
|
* Class QRCode |
|
* */ |
|
let QRCode = (() => { |
|
/** |
|
* Get the type by string length |
|
* |
|
* @private |
|
* @param {String} text |
|
* @param {Number} correctLevel |
|
* @return {Number} type |
|
*/ |
|
function getTypeNumber(text, correctLevel) { |
|
let type = 1, |
|
length = getUTF8Length(text), |
|
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]]; |
|
|
|
for (let i = 0, len = QRCodeLimitLength.length; i <= len; i++) { |
|
let limit = 0; |
|
|
|
switch (correctLevel) { |
|
case QRErrorCorrectLevel.L : |
|
limit = QRCodeLimitLength[i][0]; |
|
break; |
|
case QRErrorCorrectLevel.M : |
|
limit = QRCodeLimitLength[i][1]; |
|
break; |
|
case QRErrorCorrectLevel.Q : |
|
limit = QRCodeLimitLength[i][2]; |
|
break; |
|
case QRErrorCorrectLevel.H : |
|
limit = QRCodeLimitLength[i][3]; |
|
break; |
|
} |
|
|
|
if (length <= limit) { |
|
break; |
|
} else { |
|
type++; |
|
} |
|
} |
|
|
|
if (type > QRCodeLimitLength.length) { |
|
throw new Error('Too long data'); |
|
} |
|
return type; |
|
} |
|
|
|
function getUTF8Length(text) { |
|
let replacedText = encodeURI(text).toString().replace(/\%[0-9a-fA-F]{2}/g, 'a'); |
|
return replacedText.length + (replacedText.length != text ? 3 : 0); |
|
} |
|
|
|
class Fn { |
|
constructor(el, opts) { |
|
this._opts = { |
|
width: 300, |
|
height: 225, |
|
typeNumber: 4, |
|
colorDark: '#000000', |
|
colorLight: '#ffffff', |
|
correctLevel: Fn.correctLevel.H |
|
}; |
|
|
|
if (typeof opts === 'string') { |
|
opts = { |
|
text: opts |
|
}; |
|
} |
|
|
|
// Overwrites options 简单拷贝 |
|
if (opts) { |
|
for (let i in opts) { |
|
if (opts.hasOwnProperty(i)) { |
|
this._opts[i] = opts[i]; |
|
} |
|
|
|
} |
|
} |
|
|
|
this._el = el; |
|
this._QRCode = null; |
|
this._drawing = new Drawing(this._el, this._opts); |
|
|
|
if (this._opts.text) { |
|
this.makeCode(this._opts.text); |
|
} |
|
} |
|
|
|
makeCode(text) { |
|
this._QRCode = new QRCodeModel(getTypeNumber(text, this._opts.correctLevel), this._opts.correctLevel); |
|
this._QRCode.addData(text); |
|
this._QRCode.make(); |
|
this._drawing.draw(this._QRCode); |
|
} |
|
|
|
clear() { |
|
this._drawing.clear(); |
|
} |
|
} |
|
Fn.correctLevel = QRErrorCorrectLevel; |
|
|
|
return Fn; |
|
})(); |
|
|
|
export default QRCode;
|
|
|