| Server IP : 74.208.127.88 / Your IP : 18.191.154.2 Web Server : Apache/2.4.41 (Ubuntu) System : Linux ubuntu 5.4.0-163-generic #180-Ubuntu SMP Tue Sep 5 13:21:23 UTC 2023 x86_64 User : www-data ( 33) PHP Version : 7.4.3-4ubuntu2.29 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /var/www/html/app6/plugins/jsqrcode/ |
Upload 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 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";
}
}