Support for Arabic text

When used to write in "Arabic" it is showing white spaces only. I checked for online solutions and people were talking about something like this (including additional library):

```
// init:
include('php-gd-farsi-master/FarsiGD.php');
$gd = new FarsiGD();

....
// then convert your text:
$tx = $gd->persianText($str, 'fa', 'normal');
```

How can we do the same in SimpleImage ?