From mboxrd@z Thu Jan  1 00:00:00 1970
X-Msuck: nntp://news.gmane.io/gmane.emacs.gnus.general/19599
Path: main.gmane.org!not-for-mail
From: Hrvoje Niksic <hniksic@srce.hr>
Newsgroups: gmane.emacs.gnus.general
Subject: Re: HTML foreground and background colors being the same... poll time!
Date: 03 Dec 1998 15:44:24 +0100
Sender: owner-ding@hpc.uh.edu
Message-ID: <kig1zmhi8tz.fsf@jagor.srce.hr>
References: <199812031400.JAA09195@kramer.bp.aventail.com> <kig4srdi9oj.fsf@jagor.srce.hr> <qyjbtllcmw4.fsf@metheny.enst.fr>
NNTP-Posting-Host: coloc-standby.netfonds.no
Mime-Version: 1.0
X-Trace: main.gmane.org 1035157920 12428 80.91.224.250 (20 Oct 2002 23:52:00 GMT)
X-Complaints-To: usenet@main.gmane.org
NNTP-Posting-Date: Sun, 20 Oct 2002 23:52:00 +0000 (UTC)
Return-Path: <owner-ding@hpc.uh.edu>
Original-Received: from gizmo.hpc.uh.edu (gizmo.hpc.uh.edu [129.7.102.31])
	by sclp3.sclp.com (8.8.5/8.8.5) with ESMTP id JAA28906
	for <jason@mailhost.sclp.com>; Thu, 3 Dec 1998 09:47:02 -0500 (EST)
Original-Received: from sina.hpc.uh.edu (lists@sina.hpc.uh.edu [129.7.3.5])
	by gizmo.hpc.uh.edu (8.9.1/8.9.1) with ESMTP id IAA19661;
	Thu, 3 Dec 1998 08:45:13 -0600
Original-Received: by sina.hpc.uh.edu (TLB v0.09a (1.20 tibbs 1996/10/09 22:03:07)); Thu, 03 Dec 1998 08:44:49 -0600 (CST)
Original-Received: from sclp3.sclp.com (root@sclp3.sclp.com [204.252.123.139]) by sina.hpc.uh.edu (8.7.3/8.7.3) with ESMTP id IAA16182 for <ding@hpc.uh.edu>; Thu, 3 Dec 1998 08:44:40 -0600 (CST)
Original-Received: from jagor.srce.hr (hniksic@jagor.srce.hr [161.53.2.130])
	by sclp3.sclp.com (8.8.5/8.8.5) with ESMTP id JAA28847
	for <ding@gnus.org>; Thu, 3 Dec 1998 09:44:31 -0500 (EST)
Original-Received: (from hniksic@localhost)
	by jagor.srce.hr (8.9.0/8.9.0) id PAA05630;
	Thu, 3 Dec 1998 15:44:24 +0100 (MET)
Original-To: ding@gnus.org
X-Attribution: Hrvoje
X-Face: &{dT~)Pu6V<0y?>3p$;@vh\`C7xB~A0T-J%Og)J,@-1%q6Q+,
        gs<-9M#&`I8cJp2b1{vPE|~+JE+gx;a7%BG{}nY^ehK1"q#rG
        O,Rn1A_Cy%t]V=Brv7h<L@)<XGh#XroV6xQg$VA8K
In-Reply-To: Didier Verna's message of "03 Dec 1998 15:37:15 +0100"
User-Agent: Gnus/5.070062 (Pterodactyl Gnus v0.62) XEmacs/21.2(beta3) (Aglaia)
Precedence: list
X-Majordomo: 1.94.jlt7
Original-Lines: 26
Xref: main.gmane.org gmane.emacs.gnus.general:19599
X-Report-Spam: http://spam.gmane.org/gmane.emacs.gnus.general:19599

Didier Verna <verna@inf.enst.fr> writes:

> Hrvoje Niksic writes:
> 
> Hrvoje> "William M. Perry" <wmperry@aventail.com> writes:
> >> I'd vote for (c), but I have no clue on how to go about finding
> >> or writing a good contrast-finding algorithm. Anyone out there
> >> know of one?
> 
> Hrvoje> You can look at how XEmacs implements the "shadows" in
> Hrvoje> redisplay-x.c.  That's one example I know of.
> 
> Not quite. All they do is modify the brightness around one color
> (the widget background), and they actually [in|de]crease all RGB
> components by the same amount. Finding the best contrast for a given
> color may involve using a totally different one. The guys at gimp
> could probably help you on this.

Thanks for the reality check.  I thought the stuff at redisplay-x was
general.

-- 
Hrvoje Niksic <hniksic@srce.hr> | Student at FER Zagreb, Croatia
--------------------------------+--------------------------------
The meta-Turing test counts a thing as intelligent if it seeks to
devise and apply Turing tests to objects of its own creation.