Here is an image showing a string of Arabic text written in Nastaliq
style, rendered as a succession of individual glyphs. Note that
Nastaliq is a writing style of the Arabic script, it is thus written
right-to-left, but with an oblique baseline on each word.
This above image is wrong, because glyphs were not positioned correctly.
Using the FreeType OpenType Layout extension, the text becomes :
Now, this is correct !!