ENHANCEMENT #3775 Added getter to GD so you can retrieve the internal…

… GD resource being used. Made setGD public so you can override the GD yourself as well

git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/branches/2.4@111887 467b73ca-7a2a-4603-9d3b-597d59a354a9

filesystem/GD.php

@@ -27,12 +27,17 @@ function __construct($filename = null) {
 		$this->quality = self::$default_quality;
 		parent::__construct();
 	}
-	protected function setGD($gd) {
+
+	public function setGD($gd) {
 		$this->gd = $gd;
 		$this->width = imagesx($gd);
 		$this->height = imagesy($gd);
 	}
-
+
+	public function getGD() {
+		return $this->gd;
+	}
+
 	/**
 	 * Set the default image quality.
 	 * @param quality int A number from 0 to 100, 100 being the best quality.