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<?php
require_once(dirname(__FILE__)."/../Escpos.php");
/*
* Due to its complxity, escpos-php does not support HTML input. To print HTML,
* either convert it to calls on the Escpos() object, or rasterise the page with
* wkhtmltopdf, an external package which is designed to handle HTML efficiently.
*
* This example is provided to get you started.
*
* Note: Depending on the height of your pages, it is suggested that you chop it
* into smaller sections, as printers simply don't have the buffer capacity for
* very large images.
*
* As always, you can trade off quality for capacity by halving the width
* (550 -> 225 below) and printing w/ Escpos::IMG_DOUBLE_WIDTH | Escpos::IMG_DOUBLE_HEIGHT
*/
try {
/* Set up command */
$source = "http://en.m.wikipedia.org/wiki/ESC/P";
$width = 550;
$dest = tempnam(sys_get_temp_dir(), 'escpos') . ".png";
$cmd = sprintf("wkhtmltoimage -n -q --width %s %s %s",
escapeshellarg($width),
escapeshellarg($source),
escapeshellarg($dest));
/* Run wkhtmltoimage */
ob_start();
system($cmd); // Can also use popen() for better control of process
$outp = ob_get_contents();
ob_end_clean();
if(!file_exists($dest)) {
throw new Exception("Command $cmd failed: $outp");
}
/* Load up the image */
try {
$img = new EscposImage($dest);
} catch(Exception $e) {
unlink($dest);
throw $e;
}
unlink($dest);
/* Print it */
$printer = new Escpos(); // Add connector for your printer here.
$printer -> bitImage($img); // bitImage() seems to allow larger images than graphics() on the TM-T20.
$printer -> cut();
$printer -> close();
} catch(Exception $e) {
echo $e -> getMessage();
}