From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Richard Stallman Newsgroups: gmane.emacs.devel Subject: Re: Automatic face setting based on contrast? Date: Thu, 07 Oct 2021 18:23:12 -0400 Message-ID: References: <87k0iub53g.fsf.ref@yahoo.com> <87k0iub53g.fsf@yahoo.com> <87tuhtrp6m.fsf@gmail.com> Reply-To: rms@gnu.org Content-Type: text/plain; charset=Utf-8 Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="38583"; mail-complaints-to="usenet@ciao.gmane.io" Cc: luangruo@yahoo.com, stefan@marxist.se, tylergrinn@gmail.com, emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Oct 08 00:30:21 2021 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mYbu9-0009pe-14 for ged-emacs-devel@m.gmane-mx.org; Fri, 08 Oct 2021 00:30:21 +0200 Original-Received: from localhost ([::1]:37382 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mYbu7-000797-0p for ged-emacs-devel@m.gmane-mx.org; Thu, 07 Oct 2021 18:30:19 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58050) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mYbnE-0002ep-Nu for emacs-devel@gnu.org; Thu, 07 Oct 2021 18:23:12 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:50800) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mYbnE-0006fg-FR; Thu, 07 Oct 2021 18:23:12 -0400 Original-Received: from rms by fencepost.gnu.org with local (Exim 4.90_1) (envelope-from ) id 1mYbnE-0007vu-08; Thu, 07 Oct 2021 18:23:12 -0400 In-Reply-To: (message from Stefan Monnier on Thu, 07 Oct 2021 09:36:24 -0400) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:276525 Archived-At: [[[ To any NSA and FBI agents reading my email: please consider ]]] [[[ whether defending the US Constitution against all enemies, ]]] [[[ foreign or domestic, requires you to follow Snowden's example. ]]] > FWIW, I wrote the previous message with the following use-case in mind: > define a face that makes the text more/less red, or one that > increases/decreases contrast, ... It might be rather easy to make that work on a terminal with lots of gradations of color. The main hard part would be to know how much change is needed for users to see it clearly. However, on a tty with a limited set of colors it could be impossible. If a mode depends on this to work in order to make the output comprehensible, it would fail totally. -- Dr Richard Stallman (https://stallman.org) Chief GNUisance of the GNU Project (https://gnu.org) Founder, Free Software Foundation (https://fsf.org) Internet Hall-of-Famer (https://internethalloffame.org)