在纯PHP的esc / pos打印机上直接打印

问：

几年来，我一直在使用这个库进行直接打印。最近，我需要以纯形式编写代码。所以我写了以下代码：

<?php

// Printer IP and Port
$printerIp = '192.168.10.177';
$printerPort = 9100;

// Connect to the printer
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false) {
    echo "Error: socket_create failed\n";
}
$connect = socket_connect($socket, $printerIp, $printerPort);
if ($connect === false) {
    echo "Error: socket_connect failed\n";
}

// ESC/POS command to initialize the printer
$initializeCommand = "\x1B\x40"; // ESC @

// Send the initialization command
socket_write($socket, $initializeCommand, strlen($initializeCommand));

// Load your image
$imagePath = '../Reception/images/abc.jpg';
$image = imagecreatefromjpeg($imagePath);

// Get image dimensions
$width = imagesx($image);
$height = imagesy($image);

// Convert image to binary data
$binaryData = '';
for ($y = 0; $y < $height; $y++) {
    $slice = '';
    for ($x = 0; $x < $width; $x++) {
        $color = imagecolorat($image, $x, $y);
        $greyness = (int)((($color >> 16) & 0xFF) * 0.3 + (($color >> 8) & 0xFF) * 0.59 + ($color & 0xFF) * 0.11) >> 7;
        $dot = (1 - $greyness);
        $slice .= chr($dot);
    }
    $binaryData .= $slice;
}

// Close the image resource
imagedestroy($image);

// ESC/POS command for Raster bit image
$rasterCommand = "\x1D\x76\x30\x00"; // GS v 0 0

// Send the image data
socket_write($socket, $rasterCommand, strlen($rasterCommand));
socket_write($socket, pack('v', $width), 2); // Send the width
socket_write($socket, pack('v', $height), 2); // Send the height
socket_write($socket, $binaryData, strlen($binaryData));

// ESC/POS feed
$partialFeedCommand = "\x1B\x64\x0A"; // GS d n

// Send the partial cut command
socket_write($socket, $partialFeedCommand, strlen($partialFeedCommand));

// ESC/POS command for partial cut
$partialCutCommand = "\x1D\x56\x01"; // GS V 1

// Send the partial cut command
socket_write($socket, $partialCutCommand, strlen($partialCutCommand));

// Close the socket
socket_close($socket);

?>

打印的不是连续的，行与行之间会留出空格：请看我打印的图像

您有什么解决方案？ 谢谢

我使用过 ESC/POS 命令手册指南和这个库

更新

我以这种方式计算了 xL、xH、yL、yH 参数，但照片输出仍然没有区别：

// Calculate xL, xH, yL, yH parameters
$xL = $width % 256;
$xH = floor($width / 256);
$yL = $height % 256;
$yH = floor($height / 256);

// Send xL, xH, yL, yH parameters to the printer
socket_write($socket, $rasterCommand, strlen($rasterCommand));
socket_write($socket, pack('C', $xL), 1); // Send xL
socket_write($socket, pack('C', $xH), 1); // Send xH
socket_write($socket, pack('C', $yL), 1); // Send yL
socket_write($socket, pack('C', $yH), 1); // Send yH
socket_write($socket, $binaryData, strlen($binaryData));