Re: [png-mng-misc] iSIG vs. dSIG / which one to use when

[Glenn Randers-P. <gl...@gm...>]

On Fri, May 16, 2008 at 12:19 AM, John Bowler <jb...@ac...> wrote:
> That would, so far as I
> can see, partition PNG into a 'trusted' bitmap with no color space
> information and an untrusted part which consists of pretty much everything
> that makes PNG useful.

That's reminiscent of PNG's critical/ancillary chunk distinction.  In the
iSIg proposal, however, we've in effect promoted tRNS to critical status.

Glenn