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From: wjs@milton.u.washington.edu (William Jon Shipley)
Newsgroups: comp.sys.next
Subject: Multiple Images in a Single TIFF from Icon?
Summary: Icon -- Designed by the swiss army, maybe?
Keywords: Icon TIFF Argh
Message-ID: <1991Jun20.221058.16114@milton.u.washington.edu>
Date: 20 Jun 91 22:10:58 GMT
Organization: University of Washington
Lines: 25

Anyone know how to save multiple images of different bit depths to a single
TIFF file from Icon?

The reason I want to do this is because I want to create icons that show up
in color on color systems and grayscale on grayscale systems.  Now, I know
this happens by default, but I want to hand-tune my grayscale bitmaps, which
means including two icons in every file.

The NXImage object is keen enough to display the correct depth bitmap if you
have multiple bitmaps in a single file, but the problem is getting them there.

I've done it by hand (with a little program I wrote) but I'm looking for a
nice way to do it.  And, since Icon seems to have a zillion features no one
has figured out, I thought I'd ask the net.

BTW, I tried defining multiple frames using Icon's Animate menu, but I can't
get them to be different bit depths.

-william shipley

PS: For an example of a color/grayscale icon, look at Icon's icon.  On
grayscale machines the pencil is drawing ltgray, dkgray, and black dots,
whereas on color machines it is drawing a sort of rainbow.  (If there weren't
two images enclosed, the icon would show up on grayscale machines with
dithering on the dots.)