/**
* Function: loadImage
*
* Returns an image instance for the given URL. If the URL has
* been loaded before than an instance of the same instance is
* returned as in the previous call.
*/
function loadImage($image)
{
$img = array_key_exists($image, $this->imageCache) ? $this->imageCache[$image] : null;
if (!isset($img)) {
$img = mxUtils::loadImage($image);
if (isset($img)) {
$this->imageCache[$image] = $img;
}
}
return $img;
}
