[cairo] Seams with image backend again

[Chris Wilson]

On Mon, 12 Jul 2010 07:39:05 +0300 (EEST), M Joonas Pihlaja <jpihlaja at cc.helsinki.fi> wrote:
[snip]
> If we could get the two methods to yield bit-exact identical results 
> and only differ in speed then that would solve it, but I'm not sure if 
> that's easily doable.

Joonas, mind adding this explanation to test/bug-seams.c?
-ickle

-- 
Chris Wilson, Intel Open Source Technology Centre