On Wed, 2007-02-07 at 10:23 -0700, Michael J. Hammel wrote:
> On Wed, 2007-02-07 at 08:57 +0100, Sven Neumann wrote:
> > As far as I understand the dialog doesn't show absolute values for
> > Saturation and Lightness but relative ones. Perhaps the Saturation
> > slider should also go from -100 to +100 then.
> Saturation appears to be absolute.  Lightness is relative.  See below.


I don't remember the actual math involved and didn't try to follow
your elaborate code path description. When I implemented this it
was pretty clear from the beginning that -100% 'L' would have to
make the image all black and +100% 'L' all white, and all values
in between would be linear interpolations. That's how it was
implemented in the end.

No voodoo involved :-)

The only point potentially open for discussion would be what
the proper word for 'L' is.


Gimp-developer mailing list

Reply via email to