From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: alpha support for colors Date: Tue, 30 Oct 2012 19:43:01 +0200 Message-ID: <83pq3z7t5m.fsf@gnu.org> References: <87wqy8n2tk.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1351619010 320 80.91.229.3 (30 Oct 2012 17:43:30 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 30 Oct 2012 17:43:30 +0000 (UTC) Cc: emacs-devel@gnu.org To: aaditya sood Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Oct 30 18:43:39 2012 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1TTFqf-0005Gu-9m for ged-emacs-devel@m.gmane.org; Tue, 30 Oct 2012 18:43:33 +0100 Original-Received: from localhost ([::1]:41217 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TTFqX-0003yc-2B for ged-emacs-devel@m.gmane.org; Tue, 30 Oct 2012 13:43:25 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:55972) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TTFqS-0003xt-3C for emacs-devel@gnu.org; Tue, 30 Oct 2012 13:43:24 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TTFqQ-00078z-Td for emacs-devel@gnu.org; Tue, 30 Oct 2012 13:43:20 -0400 Original-Received: from mtaout22.012.net.il ([80.179.55.172]:33017) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TTFqQ-00078a-Lr for emacs-devel@gnu.org; Tue, 30 Oct 2012 13:43:18 -0400 Original-Received: from conversion-daemon.a-mtaout22.012.net.il by a-mtaout22.012.net.il (HyperSendmail v2007.08) id <0MCP00300V9I9J00@a-mtaout22.012.net.il> for emacs-devel@gnu.org; Tue, 30 Oct 2012 19:42:48 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout22.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0MCP002I7VVBIGJ0@a-mtaout22.012.net.il>; Tue, 30 Oct 2012 19:42:48 +0200 (IST) In-reply-to: X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 (beta) X-Received-From: 80.179.55.172 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:154589 Archived-At: > From: aaditya sood > Date: Tue, 30 Oct 2012 05:02:56 +0000 (UTC) > > If I wanted to start work on it: > > 1. Where should I begin? By publishing the proposed APIs and the use cases you want to support. What you said until now is not detailed enough, IMO. > 2. Is it even do-able in terms of complexity, or will it touch the fabled and > scary redisplay engine? If all you want is a way to create faces by alpha-blending other faces, then the display engine doesn't need to be touched at all. The display engine doesn't care about faces, they are just small numbers as far as display is concerned. The part that does care are the terminal-specific back-ends: xterm.c/xfns.c, w32term.c/w32fns.c, etc. That is where you will need to make changes to introduce support for alpha. However, since I don't really understand what features do you want to support, the above might miss the point completely.