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