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<?php
/**
* @package dompdf
* @link http://dompdf.github.com/
* @author Benj Carson <benjcarson@digitaljunkies.ca>
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
*/
namespace Dompdf;
/**
* Create canvas instances
*
* The canvas factory creates canvas instances based on the
* availability of rendering backends and config options.
*
* @package dompdf
*/
class CanvasFactory
{
/**
* Constructor is private: this is a static class
*/
private function __construct()
{
}
/**
* @param Dompdf $dompdf
* @param string|array $paper
* @param string $orientation
* @param string $class
*
* @return Canvas
*/
static function get_instance(Dompdf $dompdf, $paper = null, $orientation = null, $class = null)
{
$backend = strtolower($dompdf->getOptions()->getPdfBackend());
if (isset($class) && class_exists($class, false)) {
$class .= "_Adapter";
} else {
if (($backend === "auto" || $backend === "pdflib") &&
class_exists("PDFLib", false)
) {
$class = "Dompdf\\Adapter\\PDFLib";
}
else {
if ($backend === "gd" && extension_loaded('gd')) {
$class = "Dompdf\\Adapter\\GD";
} else {
$class = "Dompdf\\Adapter\\CPDF";
}
}
}
return new $class($paper, $orientation, $dompdf);
}
}