Преобразование изображения RGB в изображение дизеринга Floyd Steinberg с использованием API Javascript

Я разрабатываю настольное приложение на основе PHP, где мне нужно распечатать этот изображение на принтере Zebra GC420t при попытке печати этот. Так что я конвертирую свое изображение RGB в изображение дизеринга. Есть ли какой-либо Javascript API, который конвертирует мою RGB камеру в камеру с дизерингом?

    var available_printers = null;
var selected_category = null;
var default_printer = null;
var selected_printer = null;
var format_start = "^XA^LL200^FO80,50^A0N36,36^FD";
var format_end = "^FS^XZ";
var default_mode = true;

function setup_web_print()
{
$('#printer_select').on('change', onPrinterSelected);
showLoading("Loading Printer Information...");
default_mode = true;
selected_printer = null;
available_printers = null;
selected_category = null;
default_printer = null;

BrowserPrint.getDefaultDevice('printer', function(printer)
{
default_printer = printer
if((printer != null) && (printer.connection != undefined))
{
selected_printer = printer;
var printer_details = $('#printer_details');
var selected_printer_div = $('#selected_printer');

selected_printer_div.text("Using Default Printer: " + printer.name);
hideLoading();
printer_details.show();
$('#print_form').show();

}
BrowserPrint.getLocalDevices(function(printers)
{
available_printers = printers;
var sel = document.getElementById("printers");
var printers_available = false;
sel.innerHTML = "";
if (printers != undefined)
{
for(var i = 0; i < printers.length; i++)
{
if (printers[i].connection == 'usb')
{
var opt = document.createElement("option");
opt.innerHTML = printers[i].connection + ": " + printers[i].uid;
opt.value = printers[i].uid;
sel.appendChild(opt);
printers_available = true;
}
}
}

if(!printers_available)
{
showErrorMessage("No Zebra Printers could be found!");
hideLoading();
$('#print_form').hide();
return;
}
else if(selected_printer == null)
{
default_mode = false;
changePrinter();
$('#print_form').show();
hideLoading();
}
}, undefined, 'printer');
},
function(error_response)
{
showBrowserPrintNotFound();
});
};

function showBrowserPrintNotFound()
{
showErrorMessage("An error occured while attempting to connect to your Zebra Printer. You may not have Zebra Browser Print installed, or it may not be running. Install Zebra Browser Print, or start the Zebra Browser Print Service, and try again.");

};

function sendData(photoURL)
{
console.log(photoURL)
var test;
$.ajax({
url: 'db/zpl.php?photo='+photoURL,
cache: false,
contentType: false,
processData: false,
type: 'GET',
success: function(data) {
test=data;
console.log("From ZPL:"+data);

}

});



var mob="",lap="",other="";
if($("#emobile").val()==="on"){
mob="Mobile";
}

if($("#elaptop").val()==="on"){
lap="Laptop";
}

if($("#eother").val()==="on"){
other="Other";
}

showLoading("Printing...");
checkPrinterStatus( function (text){
if (text == "Ready to Print")
{

selected_printer.send("^XA N ^XZ");

selected_printer.send("~DYE:SAMPLE,A,GRF,5000,030"+test+",A");

selected_printer.send("^XA^FX Second section with recipient address and permit information. ^CFA,30 ^FO0,30^FD"+$("#user").val()+"^FS ^FO0,70^FD"+$("#compName").val()+"^FS ^FO0,110^"+$("#mob").val()+"^FS ^FO0,150^FD"+$("#email").val()+"^FS ^FO0,190^FDTo Meet:"+$("#toMeet").val()+"^FS ^FO0,230^FDPurpose:"+$("#reason").val()+"^FS ^FO0,260^FDAuthorise to Carry e-Device:"+mob+" "+lap+" "+other+"^FS ^FO400,60^XGR:SAMPLE.GRF,1,1^FS^XZ");
//selected_printer.send("^XA ^FX Second section with recipient address and permit information. ^CFA,30 ^FO50,30^FDJohn Doe^FS ^FO50,70^FD100 Main Street^FS ^FO50,110^FDSpringfield TN 39021^FS ^FO50,150^FDUnited States (USA)^FS ^XZ");
}
else
{
printerError(text);
}
});
};

function checkPrinterStatus(finishedFunction)
{
selected_printer.sendThenRead("~HQES",
function(text){
var that = this;
var statuses = new Array();
var ok = false;
var is_error = text.charAt(70);
var media = text.charAt(88);
var head = text.charAt(87);
var pause = text.charAt(84);
// check each flag that prevents printing
if (is_error == '0')
{
ok = true;
statuses.push("Ready to Print");
}
if (media == '1')
statuses.push("Paper out");
if (media == '2')
statuses.push("Ribbon Out");
if (media == '4')
statuses.push("Media Door Open");
if (media == '8')
statuses.push("Cutter Fault");
if (head == '1')
statuses.push("Printhead Overheating");
if (head == '2')
statuses.push("Motor Overheating");
if (head == '4')
statuses.push("Printhead Fault");
if (head == '8')
statuses.push("Incorrect Printhead");
if (pause == '1')
statuses.push("Printer Paused");
if ((!ok) && (statuses.Count == 0))
statuses.push("Error: Unknown Error");
finishedFunction(statuses.join());
}, printerError);
};
function hidePrintForm()
{
$('#print_form').hide();
};
function showPrintForm()
{
$('#print_form').show();
};
function showLoading(text)
{
$('#loading_message').text(text);
$('#printer_data_loading').show();
hidePrintForm();
$('#printer_details').hide();
$('#printer_select').hide();
};
function printComplete()
{
hideLoading();
alert ("Printing complete");
}
function hideLoading()
{
$('#printer_data_loading').hide();
if(default_mode == true)
{
showPrintForm();
$('#printer_details').show();
}
else
{
$('#printer_select').show();
showPrintForm();
}
};
function changePrinter()
{
default_mode = false;
selected_printer = null;
$('#printer_details').hide();
if(available_printers == null)
{
showLoading("Finding Printers...");
$('#print_form').hide();
setTimeout(changePrinter, 200);
return;
}
$('#printer_select').show();
onPrinterSelected();
}

function onPrinterSelected()
{
selected_printer = available_printers[$('#printers')[0].selectedIndex];
}

function showErrorMessage(text)
{
$('#main').hide();
$('#error_div').show();
$('#error_message').html(text);
}

function printerError(text)
{
showErrorMessage("An error occurred while printing. Please try again." + text);
}

function trySetupAgain()
{
$('#main').show();
$('#error_div').hide();
setup_web_print();
//hideLoading();
}

Выше это javascript код в строке

            selected_printer.send("^XA^FX Second section with recipient address and permit information. ^CFA,30 ^FO0,30^FD"+$("#user").val()+"^FS ^FO0,70^FD"+$("#compName").val()+"^FS ^FO0,110^"+$("#mob").val()+"^FS ^FO0,150^FD"+$("#email").val()+"^FS ^FO0,190^FDTo Meet:"+$("#toMeet").val()+"^FS ^FO0,230^FDPurpose:"+$("#reason").val()+"^FS ^FO0,260^FDAuthorise to Carry e-Device:"+mob+" "+lap+" "+other+"^FS ^FO400,60^XGR:SAMPLE.GRF,1,1^FS^XZ");

Я отправляю параметры на принтер. Преобразование изображения выполняется с использованием ниже php код

    $photo_url="";
if(isset($_GET['photo'])){
$photo_url=$_GET['photo'];
}

function image2grf($filename='$photo_url', $targetname = 'R:IMAGE.GRF')
{
$info = getimagesize($filename);
$im = imagecreatefrompng($filename);
$width = $info[0]; // imagesx($im);
$height = $info[1]; // imagesy($im);
$depth = $info['bits'] ?: 1;
$threshold = $depth > 1 ? 160 : 0;
$hexString = '';
$byteShift = 7;
$currentByte = 0;
// iterate over all image pixels
for ($y = 0; $y < $height; $y++) {
for ($x = 0; $x < $width; $x++) {
$color = imagecolorat($im, $x, $y);
// $color = imagefilter($im, IMG_FILTER_GRAYSCALE);
// $color = imagefilter($im, IMG_FILTER_CONTRAST,-1000);
// compute gray value from RGB color
if ($depth > 1) {
$value = max($color >> 16, $color >> 8 & 255, $color & 255);
} else {
$value = $color;
}
// set (inverse) bit for the current pixel
$currentByte |= (($value > $threshold ? 0 : 1) << $byteShift);
$byteShift--;
// 8 pixels filled one byte => append to output as hex
if ($byteShift < 0) {
$hexString .= sprintf('%02X', $currentByte);
$currentByte = 0;
$byteShift = 7;
}
}
// append last byte at end of row
if ($byteShift < 7) {
$hexString .= sprintf('%02X', $currentByte);
$currentByte = 0;
$byteShift = 7;
}
$hexString .= PHP_EOL;
}
// compose ZPL ~DG command
$totalBytes = ceil(($width * $height) / 8);
$bytesPerRow = ceil($width / 8);
return sprintf('~DG%s,%05d,%03d,' . PHP_EOL, $targetname, $totalBytes, $bytesPerRow) . $hexString;
}
// Usage:
print "^XA N ^XZ" . PHP_EOL;
print image2grf($photo_url, 'R:SAMPLE.GRF');

В выше php код изображение взято из базы данных в $photo_url переменная и преобразуется