Re: [9fans] PNG and APE

[Steve Simon]

> ftp://ftp.alvyray.com/Acrobat/4_Comp.pdf
> ftp://ftp.alvyray.com/Acrobat/17_Nonln.pdf

And the one that started it:
        http://www.keithp.com/~keithp/porterduff/p253-porter.pdf

-Steve