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qrcode.js
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(function (root, factory) {
if (typeof define === 'function' && define.amd)
define([], factory);
else if (typeof exports === 'object')
module.exports = factory();
else root.qrcode = factory();
}(this, function () {
/*
Ported to JavaScript by Lazar Laszlo 2011
[email protected], www.lazarsoft.info
*/
/*
*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
GridSampler = {};
GridSampler.checkAndNudgePoints=function( image, points)
{
var width = qrcode.width;
var height = qrcode.height;
// Check and nudge points from start until we see some that are OK:
var nudged = true;
for (var offset = 0; offset < points.length && nudged; offset += 2)
{
var x = Math.floor (points[offset]);
var y = Math.floor( points[offset + 1]);
if (x < - 1 || x > width || y < - 1 || y > height)
{
throw "Error.checkAndNudgePoints ";
}
nudged = false;
if (x == - 1)
{
points[offset] = 0.0;
nudged = true;
}
else if (x == width)
{
points[offset] = width - 1;
nudged = true;
}
if (y == - 1)
{
points[offset + 1] = 0.0;
nudged = true;
}
else if (y == height)
{
points[offset + 1] = height - 1;
nudged = true;
}
}
// Check and nudge points from end:
nudged = true;
for (var offset = points.length - 2; offset >= 0 && nudged; offset -= 2)
{
var x = Math.floor( points[offset]);
var y = Math.floor( points[offset + 1]);
if (x < - 1 || x > width || y < - 1 || y > height)
{
throw "Error.checkAndNudgePoints ";
}
nudged = false;
if (x == - 1)
{
points[offset] = 0.0;
nudged = true;
}
else if (x == width)
{
points[offset] = width - 1;
nudged = true;
}
if (y == - 1)
{
points[offset + 1] = 0.0;
nudged = true;
}
else if (y == height)
{
points[offset + 1] = height - 1;
nudged = true;
}
}
}
GridSampler.sampleGrid3=function( image, dimension, transform)
{
var bits = new BitMatrix(dimension);
var points = new Array(dimension << 1);
for (var y = 0; y < dimension; y++)
{
var max = points.length;
var iValue = y + 0.5;
for (var x = 0; x < max; x += 2)
{
points[x] = (x >> 1) + 0.5;
points[x + 1] = iValue;
}
transform.transformPoints1(points);
// Quick check to see if points transformed to something inside the image;
// sufficient to check the endpoints
GridSampler.checkAndNudgePoints(image, points);
try
{
for (var x = 0; x < max; x += 2)
{
var xpoint = (Math.floor( points[x]) * 4) + (Math.floor( points[x + 1]) * qrcode.width * 4);
var bit = image[Math.floor( points[x])+ qrcode.width* Math.floor( points[x + 1])];
qrcode.imagedata.data[xpoint] = bit?255:0;
qrcode.imagedata.data[xpoint+1] = bit?255:0;
qrcode.imagedata.data[xpoint+2] = 0;
qrcode.imagedata.data[xpoint+3] = 255;
//bits[x >> 1][ y]=bit;
if(bit)
bits.set_Renamed(x >> 1, y);
}
}
catch ( aioobe)
{
// This feels wrong, but, sometimes if the finder patterns are misidentified, the resulting
// transform gets "twisted" such that it maps a straight line of points to a set of points
// whose endpoints are in bounds, but others are not. There is probably some mathematical
// way to detect this about the transformation that I don't know yet.
// This results in an ugly runtime exception despite our clever checks above -- can't have
// that. We could check each point's coordinates but that feels duplicative. We settle for
// catching and wrapping ArrayIndexOutOfBoundsException.
throw "Error.checkAndNudgePoints";
}
}
return bits;
}
GridSampler.sampleGridx=function( image, dimension, p1ToX, p1ToY, p2ToX, p2ToY, p3ToX, p3ToY, p4ToX, p4ToY, p1FromX, p1FromY, p2FromX, p2FromY, p3FromX, p3FromY, p4FromX, p4FromY)
{
var transform = PerspectiveTransform.quadrilateralToQuadrilateral(p1ToX, p1ToY, p2ToX, p2ToY, p3ToX, p3ToY, p4ToX, p4ToY, p1FromX, p1FromY, p2FromX, p2FromY, p3FromX, p3FromY, p4FromX, p4FromY);
return GridSampler.sampleGrid3(image, dimension, transform);
}
/*
Ported to JavaScript by Lazar Laszlo 2011
[email protected], www.lazarsoft.info
*/
/*
*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function ECB(count, dataCodewords)
{
this.count = count;
this.dataCodewords = dataCodewords;
Object.defineProperties(this, {
'Count': {
get: function () {
return this.count;
}
},
'DataCodewords': {
get: function () {
return this.dataCodewords;
}
}
});
}
function ECBlocks( ecCodewordsPerBlock, ecBlocks1, ecBlocks2)
{
this.ecCodewordsPerBlock = ecCodewordsPerBlock;
if (ecBlocks2)
this.ecBlocks = new Array(ecBlocks1, ecBlocks2);
else
this.ecBlocks = new Array(ecBlocks1);
Object.defineProperties(this, {
"ECCodewordsPerBlock": {
get: function () {
return this.ecCodewordsPerBlock;
}
},
"TotalECCodewords": {
get: function () {
return this.ecCodewordsPerBlock * this.NumBlocks;
}
},
"NumBlocks": {
get: function () {
var total = 0;
for (var i = 0; i < this.ecBlocks.length; i++)
total += this.ecBlocks[i].length;
return total;
}
}
});
this.getECBlocks = function() {
return this.ecBlocks;
};
}
function Version( versionNumber, alignmentPatternCenters, ecBlocks1, ecBlocks2, ecBlocks3, ecBlocks4)
{
this.versionNumber = versionNumber;
this.alignmentPatternCenters = alignmentPatternCenters;
this.ecBlocks = new Array(ecBlocks1, ecBlocks2, ecBlocks3, ecBlocks4);
var total = 0;
var ecCodewords = ecBlocks1.ECCodewordsPerBlock;
var ecbArray = ecBlocks1.getECBlocks();
for (var i = 0; i < ecbArray.length; i++)
{
var ecBlock = ecbArray[i];
total += ecBlock.Count * (ecBlock.DataCodewords + ecCodewords);
}
this.totalCodewords = total;
Object.defineProperties(this, {
"VersionNumber": {
get: function () {
return this.versionNumber;
}
},
"AlignmentPatternCenters": {
get: function () {
return this.alignmentPatternCenters;
}
},
"TotalCodewords": {
get: function () {
return this.totalCodewords;
}
},
"DimensionForVersion": {
get: function () {
return 17 + 4 * this.versionNumber;
}
}
});
this.buildFunctionPattern=function()
{
var dimension = this.DimensionForVersion;
var bitMatrix = new BitMatrix(dimension);
// Top left finder pattern + separator + format
bitMatrix.setRegion(0, 0, 9, 9);
// Top right finder pattern + separator + format
bitMatrix.setRegion(dimension - 8, 0, 8, 9);
// Bottom left finder pattern + separator + format
bitMatrix.setRegion(0, dimension - 8, 9, 8);
// Alignment patterns
var max = this.alignmentPatternCenters.length;
for (var x = 0; x < max; x++)
{
var i = this.alignmentPatternCenters[x] - 2;
for (var y = 0; y < max; y++)
{
if ((x == 0 && (y == 0 || y == max - 1)) || (x == max - 1 && y == 0))
{
// No alignment patterns near the three finder paterns
continue;
}
bitMatrix.setRegion(this.alignmentPatternCenters[y] - 2, i, 5, 5);
}
}
// Vertical timing pattern
bitMatrix.setRegion(6, 9, 1, dimension - 17);
// Horizontal timing pattern
bitMatrix.setRegion(9, 6, dimension - 17, 1);
if (this.versionNumber > 6)
{
// Version info, top right
bitMatrix.setRegion(dimension - 11, 0, 3, 6);
// Version info, bottom left
bitMatrix.setRegion(0, dimension - 11, 6, 3);
}
return bitMatrix;
}
this.getECBlocksForLevel=function( ecLevel)
{
return this.ecBlocks[ecLevel.ordinal()];
}
}
Version.VERSION_DECODE_INFO = new Array(0x07C94, 0x085BC, 0x09A99, 0x0A4D3, 0x0BBF6, 0x0C762, 0x0D847, 0x0E60D, 0x0F928, 0x10B78, 0x1145D, 0x12A17, 0x13532, 0x149A6, 0x15683, 0x168C9, 0x177EC, 0x18EC4, 0x191E1, 0x1AFAB, 0x1B08E, 0x1CC1A, 0x1D33F, 0x1ED75, 0x1F250, 0x209D5, 0x216F0, 0x228BA, 0x2379F, 0x24B0B, 0x2542E, 0x26A64, 0x27541, 0x28C69);
Version.VERSIONS = buildVersions();
Version.getVersionForNumber=function( versionNumber)
{
if (versionNumber < 1 || versionNumber > 40)
{
throw "ArgumentException";
}
return Version.VERSIONS[versionNumber - 1];
}
Version.getProvisionalVersionForDimension=function(dimension)
{
if (dimension % 4 != 1)
{
throw "Error getProvisionalVersionForDimension";
}
try
{
return Version.getVersionForNumber((dimension - 17) >> 2);
}
catch ( iae)
{
throw "Error getVersionForNumber";
}
}
Version.decodeVersionInformation=function( versionBits)
{
var bestDifference = 0xffffffff;
var bestVersion = 0;
for (var i = 0; i < Version.VERSION_DECODE_INFO.length; i++)
{
var targetVersion = Version.VERSION_DECODE_INFO[i];
// Do the version info bits match exactly? done.
if (targetVersion == versionBits)
{
return this.getVersionForNumber(i + 7);
}
// Otherwise see if this is the closest to a real version info bit string
// we have seen so far
var bitsDifference = FormatInformation.numBitsDiffering(versionBits, targetVersion);
if (bitsDifference < bestDifference)
{
bestVersion = i + 7;
bestDifference = bitsDifference;
}
}
// We can tolerate up to 3 bits of error since no two version info codewords will
// differ in less than 4 bits.
if (bestDifference <= 3)
{
return this.getVersionForNumber(bestVersion);
}
// If we didn't find a close enough match, fail
return null;
}
function buildVersions()
{
return new Array(new Version(1, new Array(), new ECBlocks(7, new ECB(1, 19)), new ECBlocks(10, new ECB(1, 16)), new ECBlocks(13, new ECB(1, 13)), new ECBlocks(17, new ECB(1, 9))),
new Version(2, new Array(6, 18), new ECBlocks(10, new ECB(1, 34)), new ECBlocks(16, new ECB(1, 28)), new ECBlocks(22, new ECB(1, 22)), new ECBlocks(28, new ECB(1, 16))),
new Version(3, new Array(6, 22), new ECBlocks(15, new ECB(1, 55)), new ECBlocks(26, new ECB(1, 44)), new ECBlocks(18, new ECB(2, 17)), new ECBlocks(22, new ECB(2, 13))),
new Version(4, new Array(6, 26), new ECBlocks(20, new ECB(1, 80)), new ECBlocks(18, new ECB(2, 32)), new ECBlocks(26, new ECB(2, 24)), new ECBlocks(16, new ECB(4, 9))),
new Version(5, new Array(6, 30), new ECBlocks(26, new ECB(1, 108)), new ECBlocks(24, new ECB(2, 43)), new ECBlocks(18, new ECB(2, 15), new ECB(2, 16)), new ECBlocks(22, new ECB(2, 11), new ECB(2, 12))),
new Version(6, new Array(6, 34), new ECBlocks(18, new ECB(2, 68)), new ECBlocks(16, new ECB(4, 27)), new ECBlocks(24, new ECB(4, 19)), new ECBlocks(28, new ECB(4, 15))),
new Version(7, new Array(6, 22, 38), new ECBlocks(20, new ECB(2, 78)), new ECBlocks(18, new ECB(4, 31)), new ECBlocks(18, new ECB(2, 14), new ECB(4, 15)), new ECBlocks(26, new ECB(4, 13), new ECB(1, 14))),
new Version(8, new Array(6, 24, 42), new ECBlocks(24, new ECB(2, 97)), new ECBlocks(22, new ECB(2, 38), new ECB(2, 39)), new ECBlocks(22, new ECB(4, 18), new ECB(2, 19)), new ECBlocks(26, new ECB(4, 14), new ECB(2, 15))),
new Version(9, new Array(6, 26, 46), new ECBlocks(30, new ECB(2, 116)), new ECBlocks(22, new ECB(3, 36), new ECB(2, 37)), new ECBlocks(20, new ECB(4, 16), new ECB(4, 17)), new ECBlocks(24, new ECB(4, 12), new ECB(4, 13))),
new Version(10, new Array(6, 28, 50), new ECBlocks(18, new ECB(2, 68), new ECB(2, 69)), new ECBlocks(26, new ECB(4, 43), new ECB(1, 44)), new ECBlocks(24, new ECB(6, 19), new ECB(2, 20)), new ECBlocks(28, new ECB(6, 15), new ECB(2, 16))),
new Version(11, new Array(6, 30, 54), new ECBlocks(20, new ECB(4, 81)), new ECBlocks(30, new ECB(1, 50), new ECB(4, 51)), new ECBlocks(28, new ECB(4, 22), new ECB(4, 23)), new ECBlocks(24, new ECB(3, 12), new ECB(8, 13))),
new Version(12, new Array(6, 32, 58), new ECBlocks(24, new ECB(2, 92), new ECB(2, 93)), new ECBlocks(22, new ECB(6, 36), new ECB(2, 37)), new ECBlocks(26, new ECB(4, 20), new ECB(6, 21)), new ECBlocks(28, new ECB(7, 14), new ECB(4, 15))),
new Version(13, new Array(6, 34, 62), new ECBlocks(26, new ECB(4, 107)), new ECBlocks(22, new ECB(8, 37), new ECB(1, 38)), new ECBlocks(24, new ECB(8, 20), new ECB(4, 21)), new ECBlocks(22, new ECB(12, 11), new ECB(4, 12))),
new Version(14, new Array(6, 26, 46, 66), new ECBlocks(30, new ECB(3, 115), new ECB(1, 116)), new ECBlocks(24, new ECB(4, 40), new ECB(5, 41)), new ECBlocks(20, new ECB(11, 16), new ECB(5, 17)), new ECBlocks(24, new ECB(11, 12), new ECB(5, 13))),
new Version(15, new Array(6, 26, 48, 70), new ECBlocks(22, new ECB(5, 87), new ECB(1, 88)), new ECBlocks(24, new ECB(5, 41), new ECB(5, 42)), new ECBlocks(30, new ECB(5, 24), new ECB(7, 25)), new ECBlocks(24, new ECB(11, 12), new ECB(7, 13))),
new Version(16, new Array(6, 26, 50, 74), new ECBlocks(24, new ECB(5, 98), new ECB(1, 99)), new ECBlocks(28, new ECB(7, 45), new ECB(3, 46)), new ECBlocks(24, new ECB(15, 19), new ECB(2, 20)), new ECBlocks(30, new ECB(3, 15), new ECB(13, 16))),
new Version(17, new Array(6, 30, 54, 78), new ECBlocks(28, new ECB(1, 107), new ECB(5, 108)), new ECBlocks(28, new ECB(10, 46), new ECB(1, 47)), new ECBlocks(28, new ECB(1, 22), new ECB(15, 23)), new ECBlocks(28, new ECB(2, 14), new ECB(17, 15))),
new Version(18, new Array(6, 30, 56, 82), new ECBlocks(30, new ECB(5, 120), new ECB(1, 121)), new ECBlocks(26, new ECB(9, 43), new ECB(4, 44)), new ECBlocks(28, new ECB(17, 22), new ECB(1, 23)), new ECBlocks(28, new ECB(2, 14), new ECB(19, 15))),
new Version(19, new Array(6, 30, 58, 86), new ECBlocks(28, new ECB(3, 113), new ECB(4, 114)), new ECBlocks(26, new ECB(3, 44), new ECB(11, 45)), new ECBlocks(26, new ECB(17, 21), new ECB(4, 22)), new ECBlocks(26, new ECB(9, 13), new ECB(16, 14))),
new Version(20, new Array(6, 34, 62, 90), new ECBlocks(28, new ECB(3, 107), new ECB(5, 108)), new ECBlocks(26, new ECB(3, 41), new ECB(13, 42)), new ECBlocks(30, new ECB(15, 24), new ECB(5, 25)), new ECBlocks(28, new ECB(15, 15), new ECB(10, 16))),
new Version(21, new Array(6, 28, 50, 72, 94), new ECBlocks(28, new ECB(4, 116), new ECB(4, 117)), new ECBlocks(26, new ECB(17, 42)), new ECBlocks(28, new ECB(17, 22), new ECB(6, 23)), new ECBlocks(30, new ECB(19, 16), new ECB(6, 17))),
new Version(22, new Array(6, 26, 50, 74, 98), new ECBlocks(28, new ECB(2, 111), new ECB(7, 112)), new ECBlocks(28, new ECB(17, 46)), new ECBlocks(30, new ECB(7, 24), new ECB(16, 25)), new ECBlocks(24, new ECB(34, 13))),
new Version(23, new Array(6, 30, 54, 74, 102), new ECBlocks(30, new ECB(4, 121), new ECB(5, 122)), new ECBlocks(28, new ECB(4, 47), new ECB(14, 48)), new ECBlocks(30, new ECB(11, 24), new ECB(14, 25)), new ECBlocks(30, new ECB(16, 15), new ECB(14, 16))),
new Version(24, new Array(6, 28, 54, 80, 106), new ECBlocks(30, new ECB(6, 117), new ECB(4, 118)), new ECBlocks(28, new ECB(6, 45), new ECB(14, 46)), new ECBlocks(30, new ECB(11, 24), new ECB(16, 25)), new ECBlocks(30, new ECB(30, 16), new ECB(2, 17))),
new Version(25, new Array(6, 32, 58, 84, 110), new ECBlocks(26, new ECB(8, 106), new ECB(4, 107)), new ECBlocks(28, new ECB(8, 47), new ECB(13, 48)), new ECBlocks(30, new ECB(7, 24), new ECB(22, 25)), new ECBlocks(30, new ECB(22, 15), new ECB(13, 16))),
new Version(26, new Array(6, 30, 58, 86, 114), new ECBlocks(28, new ECB(10, 114), new ECB(2, 115)), new ECBlocks(28, new ECB(19, 46), new ECB(4, 47)), new ECBlocks(28, new ECB(28, 22), new ECB(6, 23)), new ECBlocks(30, new ECB(33, 16), new ECB(4, 17))),
new Version(27, new Array(6, 34, 62, 90, 118), new ECBlocks(30, new ECB(8, 122), new ECB(4, 123)), new ECBlocks(28, new ECB(22, 45), new ECB(3, 46)), new ECBlocks(30, new ECB(8, 23), new ECB(26, 24)), new ECBlocks(30, new ECB(12, 15), new ECB(28, 16))),
new Version(28, new Array(6, 26, 50, 74, 98, 122), new ECBlocks(30, new ECB(3, 117), new ECB(10, 118)), new ECBlocks(28, new ECB(3, 45), new ECB(23, 46)), new ECBlocks(30, new ECB(4, 24), new ECB(31, 25)), new ECBlocks(30, new ECB(11, 15), new ECB(31, 16))),
new Version(29, new Array(6, 30, 54, 78, 102, 126), new ECBlocks(30, new ECB(7, 116), new ECB(7, 117)), new ECBlocks(28, new ECB(21, 45), new ECB(7, 46)), new ECBlocks(30, new ECB(1, 23), new ECB(37, 24)), new ECBlocks(30, new ECB(19, 15), new ECB(26, 16))),
new Version(30, new Array(6, 26, 52, 78, 104, 130), new ECBlocks(30, new ECB(5, 115), new ECB(10, 116)), new ECBlocks(28, new ECB(19, 47), new ECB(10, 48)), new ECBlocks(30, new ECB(15, 24), new ECB(25, 25)), new ECBlocks(30, new ECB(23, 15), new ECB(25, 16))),
new Version(31, new Array(6, 30, 56, 82, 108, 134), new ECBlocks(30, new ECB(13, 115), new ECB(3, 116)), new ECBlocks(28, new ECB(2, 46), new ECB(29, 47)), new ECBlocks(30, new ECB(42, 24), new ECB(1, 25)), new ECBlocks(30, new ECB(23, 15), new ECB(28, 16))),
new Version(32, new Array(6, 34, 60, 86, 112, 138), new ECBlocks(30, new ECB(17, 115)), new ECBlocks(28, new ECB(10, 46), new ECB(23, 47)), new ECBlocks(30, new ECB(10, 24), new ECB(35, 25)), new ECBlocks(30, new ECB(19, 15), new ECB(35, 16))),
new Version(33, new Array(6, 30, 58, 86, 114, 142), new ECBlocks(30, new ECB(17, 115), new ECB(1, 116)), new ECBlocks(28, new ECB(14, 46), new ECB(21, 47)), new ECBlocks(30, new ECB(29, 24), new ECB(19, 25)), new ECBlocks(30, new ECB(11, 15), new ECB(46, 16))),
new Version(34, new Array(6, 34, 62, 90, 118, 146), new ECBlocks(30, new ECB(13, 115), new ECB(6, 116)), new ECBlocks(28, new ECB(14, 46), new ECB(23, 47)), new ECBlocks(30, new ECB(44, 24), new ECB(7, 25)), new ECBlocks(30, new ECB(59, 16), new ECB(1, 17))),
new Version(35, new Array(6, 30, 54, 78, 102, 126, 150), new ECBlocks(30, new ECB(12, 121), new ECB(7, 122)), new ECBlocks(28, new ECB(12, 47), new ECB(26, 48)), new ECBlocks(30, new ECB(39, 24), new ECB(14, 25)),new ECBlocks(30, new ECB(22, 15), new ECB(41, 16))),
new Version(36, new Array(6, 24, 50, 76, 102, 128, 154), new ECBlocks(30, new ECB(6, 121), new ECB(14, 122)), new ECBlocks(28, new ECB(6, 47), new ECB(34, 48)), new ECBlocks(30, new ECB(46, 24), new ECB(10, 25)), new ECBlocks(30, new ECB(2, 15), new ECB(64, 16))),
new Version(37, new Array(6, 28, 54, 80, 106, 132, 158), new ECBlocks(30, new ECB(17, 122), new ECB(4, 123)), new ECBlocks(28, new ECB(29, 46), new ECB(14, 47)), new ECBlocks(30, new ECB(49, 24), new ECB(10, 25)), new ECBlocks(30, new ECB(24, 15), new ECB(46, 16))),
new Version(38, new Array(6, 32, 58, 84, 110, 136, 162), new ECBlocks(30, new ECB(4, 122), new ECB(18, 123)), new ECBlocks(28, new ECB(13, 46), new ECB(32, 47)), new ECBlocks(30, new ECB(48, 24), new ECB(14, 25)), new ECBlocks(30, new ECB(42, 15), new ECB(32, 16))),
new Version(39, new Array(6, 26, 54, 82, 110, 138, 166), new ECBlocks(30, new ECB(20, 117), new ECB(4, 118)), new ECBlocks(28, new ECB(40, 47), new ECB(7, 48)), new ECBlocks(30, new ECB(43, 24), new ECB(22, 25)), new ECBlocks(30, new ECB(10, 15), new ECB(67, 16))),
new Version(40, new Array(6, 30, 58, 86, 114, 142, 170), new ECBlocks(30, new ECB(19, 118), new ECB(6, 119)), new ECBlocks(28, new ECB(18, 47), new ECB(31, 48)), new ECBlocks(30, new ECB(34, 24), new ECB(34, 25)), new ECBlocks(30, new ECB(20, 15), new ECB(61, 16))));
}
/*
Ported to JavaScript by Lazar Laszlo 2011
[email protected], www.lazarsoft.info
*/
/*
*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function PerspectiveTransform( a11, a21, a31, a12, a22, a32, a13, a23, a33)
{
this.a11 = a11;
this.a12 = a12;
this.a13 = a13;
this.a21 = a21;
this.a22 = a22;
this.a23 = a23;
this.a31 = a31;
this.a32 = a32;
this.a33 = a33;
this.transformPoints1=function( points)
{
var max = points.length;
var a11 = this.a11;
var a12 = this.a12;
var a13 = this.a13;
var a21 = this.a21;
var a22 = this.a22;
var a23 = this.a23;
var a31 = this.a31;
var a32 = this.a32;
var a33 = this.a33;
for (var i = 0; i < max; i += 2)
{
var x = points[i];
var y = points[i + 1];
var denominator = a13 * x + a23 * y + a33;
points[i] = (a11 * x + a21 * y + a31) / denominator;
points[i + 1] = (a12 * x + a22 * y + a32) / denominator;
}
}
this. transformPoints2=function(xValues, yValues)
{
var n = xValues.length;
for (var i = 0; i < n; i++)
{
var x = xValues[i];
var y = yValues[i];
var denominator = this.a13 * x + this.a23 * y + this.a33;
xValues[i] = (this.a11 * x + this.a21 * y + this.a31) / denominator;
yValues[i] = (this.a12 * x + this.a22 * y + this.a32) / denominator;
}
}
this.buildAdjoint=function()
{
// Adjoint is the transpose of the cofactor matrix:
return new PerspectiveTransform(this.a22 * this.a33 - this.a23 * this.a32, this.a23 * this.a31 - this.a21 * this.a33, this.a21 * this.a32 - this.a22 * this.a31, this.a13 * this.a32 - this.a12 * this.a33, this.a11 * this.a33 - this.a13 * this.a31, this.a12 * this.a31 - this.a11 * this.a32, this.a12 * this.a23 - this.a13 * this.a22, this.a13 * this.a21 - this.a11 * this.a23, this.a11 * this.a22 - this.a12 * this.a21);
}
this.times=function( other)
{
return new PerspectiveTransform(this.a11 * other.a11 + this.a21 * other.a12 + this.a31 * other.a13, this.a11 * other.a21 + this.a21 * other.a22 + this.a31 * other.a23, this.a11 * other.a31 + this.a21 * other.a32 + this.a31 * other.a33, this.a12 * other.a11 + this.a22 * other.a12 + this.a32 * other.a13, this.a12 * other.a21 + this.a22 * other.a22 + this.a32 * other.a23, this.a12 * other.a31 + this.a22 * other.a32 + this.a32 * other.a33, this.a13 * other.a11 + this.a23 * other.a12 +this.a33 * other.a13, this.a13 * other.a21 + this.a23 * other.a22 + this.a33 * other.a23, this.a13 * other.a31 + this.a23 * other.a32 + this.a33 * other.a33);
}
}
PerspectiveTransform.quadrilateralToQuadrilateral=function( x0, y0, x1, y1, x2, y2, x3, y3, x0p, y0p, x1p, y1p, x2p, y2p, x3p, y3p)
{
var qToS = this.quadrilateralToSquare(x0, y0, x1, y1, x2, y2, x3, y3);
var sToQ = this.squareToQuadrilateral(x0p, y0p, x1p, y1p, x2p, y2p, x3p, y3p);
return sToQ.times(qToS);
}
PerspectiveTransform.squareToQuadrilateral=function( x0, y0, x1, y1, x2, y2, x3, y3)
{
dy2 = y3 - y2;
dy3 = y0 - y1 + y2 - y3;
if (dy2 == 0.0 && dy3 == 0.0)
{
return new PerspectiveTransform(x1 - x0, x2 - x1, x0, y1 - y0, y2 - y1, y0, 0.0, 0.0, 1.0);
}
else
{
dx1 = x1 - x2;
dx2 = x3 - x2;
dx3 = x0 - x1 + x2 - x3;
dy1 = y1 - y2;
denominator = dx1 * dy2 - dx2 * dy1;
a13 = (dx3 * dy2 - dx2 * dy3) / denominator;
a23 = (dx1 * dy3 - dx3 * dy1) / denominator;
return new PerspectiveTransform(x1 - x0 + a13 * x1, x3 - x0 + a23 * x3, x0, y1 - y0 + a13 * y1, y3 - y0 + a23 * y3, y0, a13, a23, 1.0);
}
}
PerspectiveTransform.quadrilateralToSquare=function( x0, y0, x1, y1, x2, y2, x3, y3)
{
// Here, the adjoint serves as the inverse:
return this.squareToQuadrilateral(x0, y0, x1, y1, x2, y2, x3, y3).buildAdjoint();
}
function DetectorResult(bits, points)
{
this.bits = bits;
this.points = points;
}
function Detector(image)
{
this.image=image;
this.resultPointCallback = null;
this.sizeOfBlackWhiteBlackRun=function( fromX, fromY, toX, toY)
{
// Mild variant of Bresenham's algorithm;
// see http://en.wikipedia.org/wiki/Bresenham's_line_algorithm
var steep = Math.abs(toY - fromY) > Math.abs(toX - fromX);
if (steep)
{
var temp = fromX;
fromX = fromY;
fromY = temp;
temp = toX;
toX = toY;
toY = temp;
}
var dx = Math.abs(toX - fromX);
var dy = Math.abs(toY - fromY);
var error = - dx >> 1;
var ystep = fromY < toY?1:- 1;
var xstep = fromX < toX?1:- 1;
var state = 0; // In black pixels, looking for white, first or second time
for (var x = fromX, y = fromY; x != toX; x += xstep)
{
var realX = steep?y:x;
var realY = steep?x:y;
if (state == 1)
{
// In white pixels, looking for black
if (this.image[realX + realY*qrcode.width])
{
state++;
}
}
else
{
if (!this.image[realX + realY*qrcode.width])
{
state++;
}
}
if (state == 3)
{
// Found black, white, black, and stumbled back onto white; done
var diffX = x - fromX;
var diffY = y - fromY;
return Math.sqrt( (diffX * diffX + diffY * diffY));
}
error += dy;
if (error > 0)
{
if (y == toY)
{
break;
}
y += ystep;
error -= dx;
}
}
var diffX2 = toX - fromX;
var diffY2 = toY - fromY;
return Math.sqrt( (diffX2 * diffX2 + diffY2 * diffY2));
}
this.sizeOfBlackWhiteBlackRunBothWays=function( fromX, fromY, toX, toY)
{
var result = this.sizeOfBlackWhiteBlackRun(fromX, fromY, toX, toY);
// Now count other way -- don't run off image though of course
var scale = 1.0;
var otherToX = fromX - (toX - fromX);
if (otherToX < 0)
{
scale = fromX / (fromX - otherToX);
otherToX = 0;
}
else if (otherToX >= qrcode.width)
{
scale = (qrcode.width - 1 - fromX) / (otherToX - fromX);
otherToX = qrcode.width - 1;
}
var otherToY = Math.floor (fromY - (toY - fromY) * scale);
scale = 1.0;
if (otherToY < 0)
{
scale = fromY / (fromY - otherToY);
otherToY = 0;
}
else if (otherToY >= qrcode.height)
{
scale = (qrcode.height - 1 - fromY) / (otherToY - fromY);
otherToY = qrcode.height - 1;
}
otherToX = Math.floor (fromX + (otherToX - fromX) * scale);
result += this.sizeOfBlackWhiteBlackRun(fromX, fromY, otherToX, otherToY);
return result - 1.0; // -1 because we counted the middle pixel twice
}
this.calculateModuleSizeOneWay=function( pattern, otherPattern)
{
var moduleSizeEst1 = this.sizeOfBlackWhiteBlackRunBothWays(Math.floor( pattern.X), Math.floor( pattern.Y), Math.floor( otherPattern.X), Math.floor(otherPattern.Y));
var moduleSizeEst2 = this.sizeOfBlackWhiteBlackRunBothWays(Math.floor(otherPattern.X), Math.floor(otherPattern.Y), Math.floor( pattern.X), Math.floor(pattern.Y));
if (isNaN(moduleSizeEst1))
{
return moduleSizeEst2 / 7.0;
}
if (isNaN(moduleSizeEst2))
{
return moduleSizeEst1 / 7.0;
}
// Average them, and divide by 7 since we've counted the width of 3 black modules,
// and 1 white and 1 black module on either side. Ergo, divide sum by 14.
return (moduleSizeEst1 + moduleSizeEst2) / 14.0;
}
this.calculateModuleSize=function( topLeft, topRight, bottomLeft)
{
// Take the average
return (this.calculateModuleSizeOneWay(topLeft, topRight) + this.calculateModuleSizeOneWay(topLeft, bottomLeft)) / 2.0;
}
this.distance=function( pattern1, pattern2)
{
xDiff = pattern1.X - pattern2.X;
yDiff = pattern1.Y - pattern2.Y;
return Math.sqrt( (xDiff * xDiff + yDiff * yDiff));
}
this.computeDimension=function( topLeft, topRight, bottomLeft, moduleSize)
{
var tltrCentersDimension = Math.round(this.distance(topLeft, topRight) / moduleSize);
var tlblCentersDimension = Math.round(this.distance(topLeft, bottomLeft) / moduleSize);
var dimension = ((tltrCentersDimension + tlblCentersDimension) >> 1) + 7;
switch (dimension & 0x03)
{
// mod 4
case 0:
dimension++;
break;
// 1? do nothing
case 2:
dimension--;
break;
case 3:
throw "Error";
}
return dimension;
}
this.findAlignmentInRegion=function( overallEstModuleSize, estAlignmentX, estAlignmentY, allowanceFactor)
{
// Look for an alignment pattern (3 modules in size) around where it
// should be
var allowance = Math.floor (allowanceFactor * overallEstModuleSize);
var alignmentAreaLeftX = Math.max(0, estAlignmentX - allowance);
var alignmentAreaRightX = Math.min(qrcode.width - 1, estAlignmentX + allowance);
if (alignmentAreaRightX - alignmentAreaLeftX < overallEstModuleSize * 3)
{
throw "Error";
}
var alignmentAreaTopY = Math.max(0, estAlignmentY - allowance);
var alignmentAreaBottomY = Math.min(qrcode.height - 1, estAlignmentY + allowance);
var alignmentFinder = new AlignmentPatternFinder(this.image, alignmentAreaLeftX, alignmentAreaTopY, alignmentAreaRightX - alignmentAreaLeftX, alignmentAreaBottomY - alignmentAreaTopY, overallEstModuleSize, this.resultPointCallback);
return alignmentFinder.find();
}
this.createTransform=function( topLeft, topRight, bottomLeft, alignmentPattern, dimension)
{
var dimMinusThree = dimension - 3.5;
var bottomRightX;
var bottomRightY;
var sourceBottomRightX;
var sourceBottomRightY;
if (alignmentPattern != null)
{
bottomRightX = alignmentPattern.X;
bottomRightY = alignmentPattern.Y;
sourceBottomRightX = sourceBottomRightY = dimMinusThree - 3.0;
}
else
{
// Don't have an alignment pattern, just make up the bottom-right point
bottomRightX = (topRight.X - topLeft.X) + bottomLeft.X;
bottomRightY = (topRight.Y - topLeft.Y) + bottomLeft.Y;
sourceBottomRightX = sourceBottomRightY = dimMinusThree;
}
var transform = PerspectiveTransform.quadrilateralToQuadrilateral(3.5, 3.5, dimMinusThree, 3.5, sourceBottomRightX, sourceBottomRightY, 3.5, dimMinusThree, topLeft.X, topLeft.Y, topRight.X, topRight.Y, bottomRightX, bottomRightY, bottomLeft.X, bottomLeft.Y);
return transform;
}
this.sampleGrid=function( image, transform, dimension)
{
var sampler = GridSampler;
return sampler.sampleGrid3(image, dimension, transform);
}
this.processFinderPatternInfo = function( info)
{
var topLeft = info.TopLeft;
var topRight = info.TopRight;
var bottomLeft = info.BottomLeft;
var moduleSize = this.calculateModuleSize(topLeft, topRight, bottomLeft);
if (moduleSize < 1.0)
{
throw "Error";
}
var dimension = this.computeDimension(topLeft, topRight, bottomLeft, moduleSize);
var provisionalVersion = Version.getProvisionalVersionForDimension(dimension);
var modulesBetweenFPCenters = provisionalVersion.DimensionForVersion - 7;
var alignmentPattern = null;
// Anything above version 1 has an alignment pattern
if (provisionalVersion.AlignmentPatternCenters.length > 0)
{
// Guess where a "bottom right" finder pattern would have been
var bottomRightX = topRight.X - topLeft.X + bottomLeft.X;
var bottomRightY = topRight.Y - topLeft.Y + bottomLeft.Y;
// Estimate that alignment pattern is closer by 3 modules
// from "bottom right" to known top left location
var correctionToTopLeft = 1.0 - 3.0 / modulesBetweenFPCenters;
var estAlignmentX = Math.floor (topLeft.X + correctionToTopLeft * (bottomRightX - topLeft.X));
var estAlignmentY = Math.floor (topLeft.Y + correctionToTopLeft * (bottomRightY - topLeft.Y));
// Kind of arbitrary -- expand search radius before giving up
for (var i = 4; i <= 16; i <<= 1)
{
//try
//{
alignmentPattern = this.findAlignmentInRegion(moduleSize, estAlignmentX, estAlignmentY, i);
break;
//}
//catch (re)
//{
// try next round
//}
}
// If we didn't find alignment pattern... well try anyway without it
}
var transform = this.createTransform(topLeft, topRight, bottomLeft, alignmentPattern, dimension);
var bits = this.sampleGrid(this.image, transform, dimension);
var points;
if (alignmentPattern == null)
{
points = new Array(bottomLeft, topLeft, topRight);
}
else
{
points = new Array(bottomLeft, topLeft, topRight, alignmentPattern);
}
return new DetectorResult(bits, points);
}
this.detect=function()
{
var info = new FinderPatternFinder().findFinderPattern(this.image);
return this.processFinderPatternInfo(info);
}
}
/*
Ported to JavaScript by Lazar Laszlo 2011
[email protected], www.lazarsoft.info
*/
/*
*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var FORMAT_INFO_MASK_QR = 0x5412;
var FORMAT_INFO_DECODE_LOOKUP = new Array(new Array(0x5412, 0x00), new Array(0x5125, 0x01), new Array(0x5E7C, 0x02), new Array(0x5B4B, 0x03), new Array(0x45F9, 0x04), new Array(0x40CE, 0x05), new Array(0x4F97, 0x06), new Array(0x4AA0, 0x07), new Array(0x77C4, 0x08), new Array(0x72F3, 0x09), new Array(0x7DAA, 0x0A), new Array(0x789D, 0x0B), new Array(0x662F, 0x0C), new Array(0x6318, 0x0D), new Array(0x6C41, 0x0E), new Array(0x6976, 0x0F), new Array(0x1689, 0x10), new Array(0x13BE, 0x11), new Array(0x1CE7, 0x12), new Array(0x19D0, 0x13), new Array(0x0762, 0x14), new Array(0x0255, 0x15), new Array(0x0D0C, 0x16), new Array(0x083B, 0x17), new Array(0x355F, 0x18), new Array(0x3068, 0x19), new Array(0x3F31, 0x1A), new Array(0x3A06, 0x1B), new Array(0x24B4, 0x1C), new Array(0x2183, 0x1D), new Array(0x2EDA, 0x1E), new Array(0x2BED, 0x1F));
var BITS_SET_IN_HALF_BYTE = new Array(0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4);
function FormatInformation(formatInfo)
{
this.errorCorrectionLevel = ErrorCorrectionLevel.forBits((formatInfo >> 3) & 0x03);
this.dataMask = (formatInfo & 0x07);
Object.defineProperties(this, {
'ErrorCorrectionLevel': {
get: function () {
return this.errorCorrectionLevel;
}
},
'DataMask': {
get: function () {
return this.dataMask;
}
}
});
this.GetHashCode=function()
{
return (this.errorCorrectionLevel.ordinal() << 3) | dataMask;
}
this.Equals=function( o)
{
var other = o;
return this.errorCorrectionLevel == other.errorCorrectionLevel && this.dataMask == other.dataMask;
}
}
FormatInformation.numBitsDiffering=function( a, b)
{
a ^= b; // a now has a 1 bit exactly where its bit differs with b's
// Count bits set quickly with a series of lookups:
return BITS_SET_IN_HALF_BYTE[a & 0x0F] + BITS_SET_IN_HALF_BYTE[(URShift(a, 4) & 0x0F)] + BITS_SET_IN_HALF_BYTE[(URShift(a, 8) & 0x0F)] + BITS_SET_IN_HALF_BYTE[(URShift(a, 12) & 0x0F)] + BITS_SET_IN_HALF_BYTE[(URShift(a, 16) & 0x0F)] + BITS_SET_IN_HALF_BYTE[(URShift(a, 20) & 0x0F)] + BITS_SET_IN_HALF_BYTE[(URShift(a, 24) & 0x0F)] + BITS_SET_IN_HALF_BYTE[(URShift(a, 28) & 0x0F)];
}
FormatInformation.decodeFormatInformation=function( maskedFormatInfo)
{
var formatInfo = FormatInformation.doDecodeFormatInformation(maskedFormatInfo);
if (formatInfo != null)
{
return formatInfo;
}
// Should return null, but, some QR codes apparently
// do not mask this info. Try again by actually masking the pattern
// first
return FormatInformation.doDecodeFormatInformation(maskedFormatInfo ^ FORMAT_INFO_MASK_QR);
}
FormatInformation.doDecodeFormatInformation=function( maskedFormatInfo)
{
// Find the int in FORMAT_INFO_DECODE_LOOKUP with fewest bits differing
var bestDifference = 0xffffffff;
var bestFormatInfo = 0;
for (var i = 0; i < FORMAT_INFO_DECODE_LOOKUP.length; i++)
{
var decodeInfo = FORMAT_INFO_DECODE_LOOKUP[i];
var targetInfo = decodeInfo[0];
if (targetInfo == maskedFormatInfo)
{
// Found an exact match
return new FormatInformation(decodeInfo[1]);
}
var bitsDifference = this.numBitsDiffering(maskedFormatInfo, targetInfo);
if (bitsDifference < bestDifference)
{
bestFormatInfo = decodeInfo[1];
bestDifference = bitsDifference;
}
}
// Hamming distance of the 32 masked codes is 7, by construction, so <= 3 bits
// differing means we found a match
if (bestDifference <= 3)
{
return new FormatInformation(bestFormatInfo);
}
return null;
}
/*
Ported to JavaScript by Lazar Laszlo 2011
[email protected], www.lazarsoft.info
*/
/*
*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function ErrorCorrectionLevel(ordinal, bits, name)
{
this.ordinal_Renamed_Field = ordinal;
this.bits = bits;
this.name = name;
Object.defineProperties(this, {
'Bits': {
get: function () {
return this.bits;
}
},