Mike42\Escpos\EscposImage::load PHP Method

    public static function load($filename, $allow_optimisations = true, array $preferred = array('imagick', 'gd', 'native'))
    {
        /* Fail early if file is not readble */
        if (!file_exists($filename) || !is_readable($filename)) {
            throw new Exception("File '{$filename}' does not exist, or is not readable.");
        }
        $ext = pathinfo($filename, PATHINFO_EXTENSION);
        /* Choose the first implementation which can handle this format */
        foreach ($preferred as $implemetnation) {
            if ($implemetnation === 'imagick') {
                if (!self::isImagickLoaded()) {
                    // Skip option if Imagick is not loaded
                    continue;
                }
                return new \Mike42\Escpos\ImagickEscposImage($filename, $allow_optimisations);
            } elseif ($implemetnation === 'gd') {
                if (!self::isGdLoaded()) {
                    // Skip option if GD not loaded
                    continue;
                }
                return new \Mike42\Escpos\GdEscposImage($filename, $allow_optimisations);
            } elseif ($implemetnation === 'native') {
                if (!in_array($ext, array('wbmp', 'pbm', 'bmp'))) {
                    // Pure PHP is fastest way to generate raster output from wbmp and pbm formats.
                    continue;
                }
                return new \Mike42\Escpos\NativeEscposImage($filename, $allow_optimisations);
            } else {
                // Something else on the 'preferred' list.
                throw new InvalidArgumentException("'{$implemetnation}' is not a known EscposImage implementation");
            }
        }
        throw new InvalidArgumentException("No suitable EscposImage implementation found for '{$filename}'.");
    }

<?php

/* Print-outs using the newer graphics print command */
require __DIR__ . '/../autoload.php';
use Mike42\Escpos\Printer;
use Mike42\Escpos\EscposImage;
use Mike42\Escpos\PrintConnectors\FilePrintConnector;
$connector = new FilePrintConnector("php://stdout");
$printer = new Printer($connector);
try {
    $tux = EscposImage::load("resources/tux.png", false);
    $printer->graphics($tux);
    $printer->text("Regular Tux.\n");
    $printer->feed();
    $printer->graphics($tux, Printer::IMG_DOUBLE_WIDTH);
    $printer->text("Wide Tux.\n");
    $printer->feed();
    $printer->graphics($tux, Printer::IMG_DOUBLE_HEIGHT);
    $printer->text("Tall Tux.\n");
    $printer->feed();
    $printer->graphics($tux, Printer::IMG_DOUBLE_WIDTH | Printer::IMG_DOUBLE_HEIGHT);
    $printer->text("Large Tux in correct proportion.\n");
    $printer->cut();
} catch (Exception $e) {
    /* Images not supported on your PHP, or image file not found */
    $printer->text($e->getMessage() . "\n");
}
$printer->close();