Looking for info on developing pango shapers for indian languages

[Prabhat Hegde <Prabhat Hegde Eng Sun COM>]

	hi,
	
	I'd like to add sanskrit(ancient indian language), kannada and 
	telugu (indic scripts) shapers for pango. I'd also like to test 
	pango's hindi support using some freely available hindi fonts. 

	Before i start off, could someone on the list point me to any
	documentation on adding shapers if it exists?
	
	thanks,
	prabhat.