dolibarr/htdocs/includes/mike42/escpos-php/example/specific/97-dithering.php
2019-11-02 21:15:48 +01:00

29 lines
952 B
PHP

<?php
/*
* Example of dithering used in EscposImage by default, if you have Imagick loaded.
*/
require __DIR__ . '/../../autoload.php';
use Mike42\Escpos\Printer;
use Mike42\Escpos\EscposImage;
use Mike42\Escpos\PrintConnectors\FilePrintConnector;
$connector = new FilePrintConnector("/dev/usb/lp0");
$printer = new Printer($connector);
try {
/* Load with optimisations enabled. If you have Imagick, this will get you
a nicely dithered image, which prints very quickly
*/
$img1 = EscposImage::load(__DIR__ . '/../resources/tulips.png');
$printer -> bitImage($img1);
/* Load with optimisations disabled, forcing the use of PHP to convert the
pixels, which uses a threshold and is much slower.
*/
$img2 = EscposImage::load(__DIR__ . '/../resources/tulips.png', false);
$printer -> bitImage($img2);
$printer -> cut();
} finally {
/* Always close the printer! */
$printer -> close();
}