[cairo] how to increase a new operator in cairo

[M Joonas Pihlaja]

On Mon, 30 Nov 2009, Liang Wang wrote:

> We want to increase a new operator for ROP operation "AND".
> Could you tell me how to do it.

Does IN or DEST_IN not work for your needs?  How do you define AND 
anyway?

To add another operator you'd first need to get it into pixman, so 
have a look at how pixman implements its operators.  Adding support in 
cairo after pixman supports it is only a little bit of code after 
that.

Cheers,

Joonas