提交 e67e1a8a 编写于 作者: L Lazar Laszlo

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/*
Copyright 2011 Lazar Laszlo (lazarsoft@gmail.com, www.lazarsoft.info)
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.
*/
qrcode = {};
qrcode.imagedata = null;
qrcode.width = 0;
qrcode.height = 0;
qrcode.qrCodeSymbol = null;
qrcode.sizeOfDataLengthInfo = [ [ 10, 9, 8, 8 ], [ 12, 11, 16, 10 ], [ 14, 13, 16, 12 ] ];
qrcode.callback = null;
qrcode.decode = function(src){
if(arguments.length==0)
{
var canvas_qr = document.getElementById("qr-canvas");
var context = canvas_qr.getContext('2d');
qrcode.width = canvas_qr.width;
qrcode.height = canvas_qr.height;
qrcode.imagedata = context.getImageData(0, 0, qrcode.width, qrcode.height);
qrcode.result = qrcode.process(context);
if(qrcode.callback!=null)
qrcode.callback(qrcode.result);
return qrcode.result;
}
else
{
var image = new Image();
image.onload=function(){
//var canvas_qr = document.getElementById("qr-canvas");
var canvas_qr = document.createElement('canvas');
var context = canvas_qr.getContext('2d');
var canvas_out = document.getElementById("out-canvas");
if(canvas_out!=null)
{
var outctx = canvas_out.getContext('2d');
outctx.clearRect(0, 0, 320, 240);
outctx.drawImage(image, 0, 0, 320, 240);
}
canvas_qr.width = image.width;
canvas_qr.height = image.height;
context.drawImage(image, 0, 0);
qrcode.width = image.width;
qrcode.height = image.height;
try{
qrcode.imagedata = context.getImageData(0, 0, image.width, image.height);
}catch(e){
qrcode.result = "Cross domain image reading not supported in your browser! Save it to your computer then drag and drop the file!";
if(qrcode.callback!=null)
qrcode.callback(qrcode.result);
return;
}
try
{
qrcode.result = qrcode.process(context);
}
catch(e)
{
console.log(e);
qrcode.result = "error decoding QR Code";
}
if(qrcode.callback!=null)
qrcode.callback(qrcode.result);
}
image.src = src;
}
}
qrcode.process = function(ctx){
var start = new Date().getTime();
var image = qrcode.grayScaleToBitmap(qrcode.grayscale());
/*
for (var y = 0; y < qrcode.height; y++)
{
for (var x = 0; x < qrcode.width; x++)
{
var point = (x * 4) + (y * qrcode.width * 4);
qrcode.imagedata.data[point] = image[x+y*qrcode.width]?0:0;
qrcode.imagedata.data[point+1] = image[x+y*qrcode.width]?0:0;
qrcode.imagedata.data[point+2] = image[x+y*qrcode.width]?255:0;
}
}
ctx.putImageData(qrcode.imagedata, 0, 0);*/
//var finderPatternInfo = new FinderPatternFinder().findFinderPattern(image);
var detector = new Detector(image);
var qRCodeMatrix = detector.detect();
/*for (var y = 0; y < qRCodeMatrix.bits.Height; y++)
{
for (var x = 0; x < qRCodeMatrix.bits.Width; x++)
{
var point = (x * 4*2) + (y*2 * qrcode.width * 4);
qrcode.imagedata.data[point] = qRCodeMatrix.bits.get_Renamed(x,y)?0:0;
qrcode.imagedata.data[point+1] = qRCodeMatrix.bits.get_Renamed(x,y)?0:0;
qrcode.imagedata.data[point+2] = qRCodeMatrix.bits.get_Renamed(x,y)?255:0;
}
}*/
ctx.putImageData(qrcode.imagedata, 0, 0);
var reader = Decoder.decode(qRCodeMatrix.bits);
var data = reader.DataByte;
var str="";
for(var i=0;i<data.length;i++)
{
for(var j=0;j<data[i].length;j++)
str+=String.fromCharCode(data[i][j]);
}
var end = new Date().getTime();
var time = end - start;
console.log(time);
return str;
//alert("Time:" + time + " Code: "+str);
}
qrcode.getPixel = function(x,y){
if (qrcode.width < x) {
throw "point error";
}
if (qrcode.height < y) {
throw "point error";
}
point = (x * 4) + (y * qrcode.width * 4);
p = (qrcode.imagedata.data[point]*30 + qrcode.imagedata.data[point + 1]*59 + qrcode.imagedata.data[point + 2]*11)/100;
return p;
}
qrcode.binarize = function(th){
var ret = new Array(qrcode.width*qrcode.height);
for (var y = 0; y < qrcode.height; y++)
{
for (var x = 0; x < qrcode.width; x++)
{
var gray = qrcode.getPixel(x, y);
ret[x+y*qrcode.width] = gray<=th?true:false;
}
}
return ret;
}
qrcode.getMiddleBrightnessPerArea=function(image)
{
var numSqrtArea = 4;
//obtain middle brightness((min + max) / 2) per area
var areaWidth = Math.floor(qrcode.width / numSqrtArea);
var areaHeight = Math.floor(qrcode.height / numSqrtArea);
var minmax = new Array(numSqrtArea);
for (var i = 0; i < numSqrtArea; i++)
{
minmax[i] = new Array(numSqrtArea);
for (var i2 = 0; i2 < numSqrtArea; i2++)
{
minmax[i][i2] = new Array(0,0);
}
}
for (var ay = 0; ay < numSqrtArea; ay++)
{
for (var ax = 0; ax < numSqrtArea; ax++)
{
minmax[ax][ay][0] = 0xFF;
for (var dy = 0; dy < areaHeight; dy++)
{
for (var dx = 0; dx < areaWidth; dx++)
{
var target = image[areaWidth * ax + dx+(areaHeight * ay + dy)*qrcode.width];
if (target < minmax[ax][ay][0])
minmax[ax][ay][0] = target;
if (target > minmax[ax][ay][1])
minmax[ax][ay][1] = target;
}
}
//minmax[ax][ay][0] = (minmax[ax][ay][0] + minmax[ax][ay][1]) / 2;
}
}
var middle = new Array(numSqrtArea);
for (var i3 = 0; i3 < numSqrtArea; i3++)
{
middle[i3] = new Array(numSqrtArea);
}
for (var ay = 0; ay < numSqrtArea; ay++)
{
for (var ax = 0; ax < numSqrtArea; ax++)
{
middle[ax][ay] = Math.floor((minmax[ax][ay][0] + minmax[ax][ay][1]) / 2);
//Console.out.print(middle[ax][ay] + ",");
}
//Console.out.println("");
}
//Console.out.println("");
return middle;
}
qrcode.grayScaleToBitmap=function(grayScale)
{
var middle = qrcode.getMiddleBrightnessPerArea(grayScale);
var sqrtNumArea = middle.length;
var areaWidth = Math.floor(qrcode.width / sqrtNumArea);
var areaHeight = Math.floor(qrcode.height / sqrtNumArea);
var bitmap = new Array(qrcode.height*qrcode.width);
for (var ay = 0; ay < sqrtNumArea; ay++)
{
for (var ax = 0; ax < sqrtNumArea; ax++)
{
for (var dy = 0; dy < areaHeight; dy++)
{
for (var dx = 0; dx < areaWidth; dx++)
{
bitmap[areaWidth * ax + dx+ (areaHeight * ay + dy)*qrcode.width] = (grayScale[areaWidth * ax + dx+ (areaHeight * ay + dy)*qrcode.width] < middle[ax][ay])?true:false;
}
}
}
}
return bitmap;
}
qrcode.grayscale = function(){
var ret = new Array(qrcode.width*qrcode.height);
for (var y = 0; y < qrcode.height; y++)
{
for (var x = 0; x < qrcode.width; x++)
{
var gray = qrcode.getPixel(x, y);
ret[x+y*qrcode.width] = gray;
}
}
return ret;
}
function URShift( number, bits)
{
if (number >= 0)
return number >> bits;
else
return (number >> bits) + (2 << ~bits);
}
Array.prototype.remove = function(from, to) {
var rest = this.slice((to || from) + 1 || this.length);
this.length = from < 0 ? this.length + from : from;
return this.push.apply(this, rest);
};
/*
Ported to JavaScript by Lazar Laszlo 2011
lazarsoft@gmail.com, 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 AlignmentPattern(posX, posY, estimatedModuleSize)
{
this.x=posX;
this.y=posY;
this.count = 1;
this.estimatedModuleSize = estimatedModuleSize;
this.__defineGetter__("EstimatedModuleSize", function()
{
return this.estimatedModuleSize;
});
this.__defineGetter__("Count", function()
{
return this.count;
});
this.__defineGetter__("X", function()
{
return Math.floor(this.x);
});
this.__defineGetter__("Y", function()
{
return Math.floor(this.y);
});
this.incrementCount = function()
{
this.count++;
}
this.aboutEquals=function( moduleSize, i, j)
{
if (Math.abs(i - this.y) <= moduleSize && Math.abs(j - this.x) <= moduleSize)
{
var moduleSizeDiff = Math.abs(moduleSize - this.estimatedModuleSize);
return moduleSizeDiff <= 1.0 || moduleSizeDiff / this.estimatedModuleSize <= 1.0;
}
return false;
}
}
function AlignmentPatternFinder( image, startX, startY, width, height, moduleSize, resultPointCallback)
{
this.image = image;
this.possibleCenters = new Array();
this.startX = startX;
this.startY = startY;
this.width = width;
this.height = height;
this.moduleSize = moduleSize;
this.crossCheckStateCount = new Array(0,0,0);
this.resultPointCallback = resultPointCallback;
this.centerFromEnd=function(stateCount, end)
{
return (end - stateCount[2]) - stateCount[1] / 2.0;
}
this.foundPatternCross = function(stateCount)
{
var moduleSize = this.moduleSize;
var maxVariance = moduleSize / 2.0;
for (var i = 0; i < 3; i++)
{
if (Math.abs(moduleSize - stateCount[i]) >= maxVariance)
{
return false;
}
}
return true;
}
this.crossCheckVertical=function( startI, centerJ, maxCount, originalStateCountTotal)
{
var image = this.image;
var maxI = qrcode.height;
var stateCount = this.crossCheckStateCount;
stateCount[0] = 0;
stateCount[1] = 0;
stateCount[2] = 0;
// Start counting up from center
var i = startI;
while (i >= 0 && image[centerJ + i*qrcode.width] && stateCount[1] <= maxCount)
{
stateCount[1]++;
i--;
}
// If already too many modules in this state or ran off the edge:
if (i < 0 || stateCount[1] > maxCount)
{
return NaN;
}
while (i >= 0 && !image[centerJ + i*qrcode.width] && stateCount[0] <= maxCount)
{
stateCount[0]++;
i--;
}
if (stateCount[0] > maxCount)
{
return NaN;
}
// Now also count down from center
i = startI + 1;
while (i < maxI && image[centerJ + i*qrcode.width] && stateCount[1] <= maxCount)
{
stateCount[1]++;
i++;
}
if (i == maxI || stateCount[1] > maxCount)
{
return NaN;
}
while (i < maxI && !image[centerJ + i*qrcode.width] && stateCount[2] <= maxCount)
{
stateCount[2]++;
i++;
}
if (stateCount[2] > maxCount)
{
return NaN;
}
var stateCountTotal = stateCount[0] + stateCount[1] + stateCount[2];
if (5 * Math.abs(stateCountTotal - originalStateCountTotal) >= 2 * originalStateCountTotal)
{
return NaN;
}
return this.foundPatternCross(stateCount)?this.centerFromEnd(stateCount, i):NaN;
}
this.handlePossibleCenter=function( stateCount, i, j)
{
var stateCountTotal = stateCount[0] + stateCount[1] + stateCount[2];
var centerJ = this.centerFromEnd(stateCount, j);
var centerI = this.crossCheckVertical(i, Math.floor (centerJ), 2 * stateCount[1], stateCountTotal);
if (!isNaN(centerI))
{
var estimatedModuleSize = (stateCount[0] + stateCount[1] + stateCount[2]) / 3.0;
var max = this.possibleCenters.length;
for (var index = 0; index < max; index++)
{
var center = this.possibleCenters[index];
// Look for about the same center and module size:
if (center.aboutEquals(estimatedModuleSize, centerI, centerJ))
{
return new AlignmentPattern(centerJ, centerI, estimatedModuleSize);
}
}
// Hadn't found this before; save it
var point = new AlignmentPattern(centerJ, centerI, estimatedModuleSize);
this.possibleCenters.push(point);
if (this.resultPointCallback != null)
{
this.resultPointCallback.foundPossibleResultPoint(point);
}
}
return null;
}
this.find = function()
{
var startX = this.startX;
var height = this.height;
var maxJ = startX + width;
var middleI = startY + (height >> 1);
// We are looking for black/white/black modules in 1:1:1 ratio;
// this tracks the number of black/white/black modules seen so far
var stateCount = new Array(0,0,0);
for (var iGen = 0; iGen < height; iGen++)
{
// Search from middle outwards
var i = middleI + ((iGen & 0x01) == 0?((iGen + 1) >> 1):- ((iGen + 1) >> 1));
stateCount[0] = 0;
stateCount[1] = 0;
stateCount[2] = 0;
var j = startX;
// Burn off leading white pixels before anything else; if we start in the middle of
// a white run, it doesn't make sense to count its length, since we don't know if the
// white run continued to the left of the start point
while (j < maxJ && !image[j + qrcode.width* i])
{
j++;
}
var currentState = 0;
while (j < maxJ)
{
if (image[j + i*qrcode.width])
{
// Black pixel
if (currentState == 1)
{
// Counting black pixels
stateCount[currentState]++;
}
else
{
// Counting white pixels
if (currentState == 2)
{
// A winner?
if (this.foundPatternCross(stateCount))
{
// Yes
var confirmed = this.handlePossibleCenter(stateCount, i, j);
if (confirmed != null)
{
return confirmed;
}
}
stateCount[0] = stateCount[2];
stateCount[1] = 1;
stateCount[2] = 0;
currentState = 1;
}
else
{
stateCount[++currentState]++;
}
}
}
else
{
// White pixel
if (currentState == 1)
{
// Counting black pixels
currentState++;
}
stateCount[currentState]++;
}
j++;
}
if (this.foundPatternCross(stateCount))
{
var confirmed = this.handlePossibleCenter(stateCount, i, maxJ);
if (confirmed != null)
{
return confirmed;
}
}
}
// Hmm, nothing we saw was observed and confirmed twice. If we had
// any guess at all, return it.
if (!(this.possibleCenters.length == 0))
{
return this.possibleCenters[0];
}
throw "Couldn't find enough alignment patterns";
}
}
\ No newline at end of file
/*
Ported to JavaScript by Lazar Laszlo 2011
lazarsoft@gmail.com, 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 BitMatrix( width, height)
{
if(!height)
height=width;
if (width < 1 || height < 1)
{
throw "Both dimensions must be greater than 0";
}
this.width = width;
this.height = height;
var rowSize = width >> 5;
if ((width & 0x1f) != 0)
{
rowSize++;
}
this.rowSize = rowSize;
this.bits = new Array(rowSize * height);
for(var i=0;i<this.bits.length;i++)
this.bits[i]=0;
this.__defineGetter__("Width", function()
{
return this.width;
});
this.__defineGetter__("Height", function()
{
return this.height;
});
this.__defineGetter__("Dimension", function()
{
if (this.width != this.height)
{
throw "Can't call getDimension() on a non-square matrix";
}
return this.width;
});
this.get_Renamed=function( x, y)
{
var offset = y * this.rowSize + (x >> 5);
return ((URShift(this.bits[offset], (x & 0x1f))) & 1) != 0;
}
this.set_Renamed=function( x, y)
{
var offset = y * this.rowSize + (x >> 5);
this.bits[offset] |= 1 << (x & 0x1f);
}
this.flip=function( x, y)
{
var offset = y * this.rowSize + (x >> 5);
this.bits[offset] ^= 1 << (x & 0x1f);
}
this.clear=function()
{
var max = this.bits.length;
for (var i = 0; i < max; i++)
{
this.bits[i] = 0;
}
}
this.setRegion=function( left, top, width, height)