From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.comp.tex.context/83889 Path: news.gmane.org!not-for-mail From: Hans Hagen Newsgroups: gmane.comp.tex.context Subject: Re: Feature Request: define colour in relation to existing colour Date: Wed, 21 Aug 2013 10:55:29 +0200 Message-ID: <52148081.8070101@wxs.nl> References: Reply-To: mailing list for ConTeXt users NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1377075373 12779 80.91.229.3 (21 Aug 2013 08:56:13 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 21 Aug 2013 08:56:13 +0000 (UTC) To: ntg-context@ntg.nl Original-X-From: ntg-context-bounces@ntg.nl Wed Aug 21 10:56:16 2013 Return-path: Envelope-to: gctc-ntg-context-518@m.gmane.org Original-Received: from balder.ntg.nl ([5.39.185.229]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1VC4DA-0006AE-NN for gctc-ntg-context-518@m.gmane.org; Wed, 21 Aug 2013 10:56:16 +0200 Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id D6BFE10209; Wed, 21 Aug 2013 10:55:08 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (balder.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id jH4eKlvjOF3G; Wed, 21 Aug 2013 10:55:07 +0200 (CEST) Original-Received: from balder.ntg.nl (localhost [IPv6:::1]) by balder.ntg.nl (Postfix) with ESMTP id 2EFEC10204; Wed, 21 Aug 2013 10:55:07 +0200 (CEST) Original-Received: from localhost (localhost [127.0.0.1]) by balder.ntg.nl (Postfix) with ESMTP id 2FDDD10204 for ; Wed, 21 Aug 2013 10:55:05 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at balder.ntg.nl Original-Received: from balder.ntg.nl ([127.0.0.1]) by localhost (balder.ntg.nl [127.0.0.1]) (amavisd-new, port 10024) with LMTP id R1eC2z3B6Vpz for ; Wed, 21 Aug 2013 10:54:51 +0200 (CEST) Original-Received: from filter1-utr.mf.surf.net (filter1-utr.mf.surf.net [195.169.124.152]) by balder.ntg.nl (Postfix) with ESMTP id 5D38F10202 for ; Wed, 21 Aug 2013 10:54:51 +0200 (CEST) Original-Received: from smtp.ziggozakelijk.nl (D57D1DA2.static.ziggozakelijk.nl [213.125.29.162]) by filter1-utr.mf.surf.net (8.14.3/8.14.3/Debian-9.4) with ESMTP id r7L8tvVG020069 for ; Wed, 21 Aug 2013 10:55:57 +0200 X-Default-Received-SPF: pass (skip=loggedin (res=PASS)) x-ip-name=10.100.1.103; Original-Received: from [10.100.1.103] (unverified [10.100.1.103]) by pragma-net.nl (SurgeMail 6.3c2) with ESMTP id 2284-1713362 for ; Wed, 21 Aug 2013 10:55:56 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 In-Reply-To: X-Authenticated-User: hagen@controller-9 X-Bayes-Prob: 0.0001 (Score 0, tokens from: @@RPTN) X-CanIt-Geo: ip=213.125.29.162; country=NL; region=15; city=Zwolle; latitude=52.5058; longitude=6.0858; http://maps.google.com/maps?q=52.5058,6.0858&z=6 X-CanItPRO-Stream: uu:ntg-context@ntg.nl (inherits from uu:default, base:default) X-Canit-Stats-ID: 07KfkTVgq - a5a3568e58cc - 20130821 (trained as not-spam) X-Scanned-By: CanIt (www . roaringpenguin . com) X-BeenThere: ntg-context@ntg.nl X-Mailman-Version: 2.1.14 Precedence: list List-Id: mailing list for ConTeXt users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: ntg-context-bounces@ntg.nl Original-Sender: ntg-context-bounces@ntg.nl Xref: news.gmane.org gmane.comp.tex.context:83889 Archived-At: On 8/21/2013 2:25 AM, Thangalin wrote: > Hi, > > What would it take to extend \definecolor so that: > > \definecolor[ColourA][ColourB][t=0.5, a=1] > > defines a new colour (ColourB) based on an existing colour (ColourA)? > > I know that \definespotcolor[ColourA][ColourB][t=0.5, a=1] works, but > it seems like \definecolor would also be a natural fit. hm, afaik no one ever needed that (normally one defines colors once on top of the document and there are seldom many of them) anyhow, as general inheritance is pretty fuzzy i.e. cloning a spot color and changing some rgb component or cloning a cmyk color and setting rgb components it will not be a feature of definecolor I've added \defineprocesscolor that cna be used as follows: \starttext \defineprocesscolor[red][r=.5] \blackrule[color=red,width=\hsize,height=1cm] \defineprocesscolor[redish][red][a=1,t=.5] \blackrule[color=redish,width=\hsize,height=1cm] \stoptext But ... as there is some checking of the preferred color space (in context each defined color has a preferred color space and there is also a current colorspace that gets applied) you need to be aware of this: \starttext \defineprocesscolor[red][r=.5] \blackrule[color=red,width=\hsize,height=1cm] \defineprocesscolor[redish][red][a=1,t=.5] \blackrule[color=redish,width=\hsize,height=1cm] \defineprocesscolor[yellowish][red] \blackrule[color=yellowish,width=\hsize,height=1cm] \defineprocesscolor[yellowish][red][a=1,t=.5,y=.5] \blackrule[color=yellowish,width=\hsize,height=1cm] \defineprocesscolor[cyan][c=.5] \defineprocesscolor[yellowish][cyan][y=.5] \blackrule[color=yellowish,width=\hsize,height=1cm] \stoptext Now .. as you requested it, you're also the one who's going to wikify it. I'll upload a beta later. Hans ps. Transparency operates independently of colors but I never figured out a decent way to let that cooperate with existing colors that have transparency specs without breaking compatibility so it might never happen (in fact we have: current color space, current color, current transparency). ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________