[comp.lang.postscript] alphaimage? colorimage?

pokey@well.UUCP (Jef Poskanzer) (09/01/89)

I keep seeing references to these.  They are not in the Red Book, so
I guess someone has been extending the language.  Who is responsible,
and can I get a quick description of these operators?

Also, has anyone come up with a *standard* way of doing color images
in PostScript?
---
Jef

    Jef Poskanzer  pokey@well.sf.ca.us  {ucbvax, apple, hplabs}!well!pokey
             "The nice thing about standards is that there are so
             many of them to choose from." -- Andrew S. Tanenbaum

pokey@well.UUCP (Jef Poskanzer) (09/02/89)

In the referenced message, I wrote:
}I keep seeing references to these.  They are not in the Red Book, so
}I guess someone has been extending the language.  Who is responsible,
}and can I get a quick description of these operators?

Ok, colorimage is described in the colorops document, available from
ps-file-server.  What about alphaimage?  Is this a NeXTism?
---
Jef

    Jef Poskanzer  pokey@well.sf.ca.us  {ucbvax, apple, hplabs}!well!pokey
                        "That's the biz, sweetheart."