AMP file are very simple to read and to process: These "arbitrary map
files" contain gamma tables with 256 byte values. The files contain
either one or three (and possibly more) of these tables. A monochrome
table would contain just one set of values, an RGB table would contain
three sets. 

Details can be found in the Adobe documentation of the Photoshop
format (Adobe Photoshop 6.0 - File Formats Specification), which 
can be downloaded from Adobe's web site.

Adding this to either the Gimp curves tool or the Gimp-Print plug-in
would be very simple.

Hope this helps,

Karl Heinz

On Fri, Mar 29, 2002 at 06:48:06PM -0500, Robert L Krawitz wrote:
>    From: "Branko Collin" <[EMAIL PROTECTED]>
>    Date: Fri, 29 Mar 2002 23:10:12 +0100
>    Regis Rampnoux recently made a plug-in which can be found at
>    <>. I am not sure I entirely
>    understand what it does, but it looks like it applies the curve
>    directly, rather than converting it to a GIMP curve first.
>    I seem to remember he was working on another plug-in for Photoshop
>    curves.
> I'd really like to see somebody do this as a front end to the
> Gimp-Print plugin (perhaps with some of the core incorporated into the
> Gimp-print core).  I'll be happy to accept someone who wants to work
> on this onto the Gimp-print project.
> With the current 8 bit only GIMP, this really needs to happen at the
> printing stage.  Applying this kind of transform to 8-bit data means
> losing a lot of information; in 16 bits (which Gimp-print uses
> internally), this isn't a problem.  Gimp-print has a 16-bit raw CMYK
> printing mode that's ideal for this kind of thing.
> -- 
> Robert Krawitz <[EMAIL PROTECTED]>
> Tall Clubs International  -- or 1-888-IM-TALL-2
> Member of the League for Programming Freedom -- mail [EMAIL PROTECTED]
> Project lead for Gimp Print/stp --
> "Linux doesn't dictate how I work, I dictate how Linux works."
> --Eric Crampton
> _______________________________________________
> Gimp-developer mailing list

Karl Heinz Kremer                                  [EMAIL PROTECTED]
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