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List:       kde-core-devel
Subject:    Re: What to do about KColor?
From:       Matthew Woehlke <mw_triad () users ! sourceforge ! net>
Date:       2007-05-29 23:40:01
Message-ID: f3idkj$d8q$1 () sea ! gmane ! org
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Germain Garand wrote:
> (as for my clame to expertise, it is restricted to coming up with 
> khtml::hasSufficientContrast's algorithm using hsv, which was a pain and 
> would very likely work better in HSL)

/me gags
This is supposed to be in kdelibs, and if the usability stuff happens, 
it will be. Please pipe up when/if I start asking for comments (i.e. 
"who needs what?") on that :-). (And yes, functions like this really, 
really, really should use... well, HSY. Although in this case qGray* 
should suffice, but the usability stuff needs to generate colors; that's 
trivial in HSL/HSY and a PITA to do in HSV.)

(* qGray is a little odd because the coefficients it uses do not reflect 
either of the REC standards I am familiar with, namely 601 and 709, but 
since the Y coefficients are a function of the display device anyway, I 
don't presume that this means anything other than Qt had some reason I 
am not familiar with for choosing the coefficients that they did.)

-- 
Matthew
"A mouse is a device used to point at the xterm you want to type in."
   --Kim Alm, A.S.R.

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