220 8858 article Path: news.gmane.org!not-for-mail From: Felipe Magno de Almeida Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Comments on 2d api for c++ N3888.pdf Date: Mon, 27 Jan 2014 15:45:25 -0200 Lines: 44 Approved: news@gmane.org Message-ID: References: <9105f9b2-e15d-4bf8-a4a1-65ebc3657eb0@isocpp.org> <3766829.y6foiXVjg7@tjmaciei-mobl2> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-Trace: ger.gmane.org 1390844751 8159 80.91.229.3 (27 Jan 2014 17:45:51 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 27 Jan 2014 17:45:51 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCL7ZKXVZICRBVFWTKLQKGQE75EZV2Y@isocpp.org Mon Jan 27 18:46:00 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wg0-f72.google.com ([74.125.82.72]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1W7qFx-0003iz-Mv for gclcip-std-proposals@m.gmane.org; Mon, 27 Jan 2014 18:45:57 +0100 Original-Received: by mail-wg0-f72.google.com with SMTP id y10sf12425841wgg.7 for ; Mon, 27 Jan 2014 09:45:57 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe:content-type; bh=0jVlYHOKjrhl/yVKRJq4C/PkFFnnCXcVG5fbyoSdOgM=; b=ZmkX+iQ+gGarWXcNq3lDu1hg/5Bth5vXM4Ft0EgbBGtv4vo4leZMoT/S2ckvrLuKmc dKpT8l5I43D6ZK7JjnoKOP4m5Nlnx93aOAMHMVpMMkcBYZlnH7teU/ikaQoQ/WKzd7tU CGxyE96csOPJkNmrZsqqd+lGRrj8qTI3APYmL36/eIcwPxp+oGuaa6hQeCvVkZa5ZjQN MXUoLcCDI0FfwWMa9biVmjv/bLUgHrHCwWGASyw53XiZ5C/pYPKvzqlNgmzEdhs9sdtA apG4YUzz0bgtdRJQxKH4sOXwL/OudG7zBgead4Ws2Q92S/5hJ9wJSmM49ksiZGgy36ty cz+A== X-Gm-Message-State: ALoCoQkTHWKhjJUjv3XrszzUQL//XCUptO1tqzsWivFfISctOlv9oiXFux3UCUpwhdQ9ASi+YWWx X-Received: by 10.14.246.4 with SMTP id p4mr16652977eer.3.1390844757370; Mon, 27 Jan 2014 09:45:57 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.24.37 with SMTP id r5ls1027743wif.38.canary; Mon, 27 Jan 2014 09:45:56 -0800 (PST) X-Received: by 10.205.43.200 with SMTP id ud8mr21487813bkb.39.1390844756437; Mon, 27 Jan 2014 09:45:56 -0800 (PST) Original-Received: from mail-ig0-x22a.google.com (mail-ig0-x22a.google.com [2607:f8b0:4001:c05::22a]) by mx.google.com with ESMTPS id k2si15193781bkr.185.2014.01.27.09.45.56 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 27 Jan 2014 09:45:56 -0800 (PST) Received-SPF: pass (google.com: domain of felipe.m.almeida@gmail.com designates 2607:f8b0:4001:c05::22a as permitted sender) client-ip=2607:f8b0:4001:c05::22a; Original-Received: by mail-ig0-f170.google.com with SMTP id m12so11932638iga.1 for ; Mon, 27 Jan 2014 09:45:55 -0800 (PST) X-Received: by 10.50.66.208 with SMTP id h16mr23262615igt.0.1390844755105; Mon, 27 Jan 2014 09:45:55 -0800 (PST) Original-Received: by 10.50.150.196 with HTTP; Mon, 27 Jan 2014 09:45:25 -0800 (PST) In-Reply-To: <3766829.y6foiXVjg7@tjmaciei-mobl2> X-Original-Sender: felipe.m.almeida@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of felipe.m.almeida@gmail.com designates 2607:f8b0:4001:c05::22a as permitted sender) smtp.mail=felipe.m.almeida@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=NONE dis=NONE) header.from=gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:8858 Archived-At: On Mon, Jan 27, 2014 at 3:34 PM, Thiago Macieira wrote: > On segunda-feira, 27 de janeiro de 2014 15:19:16, Felipe Magno de Almeida > wrote: >> I don't know why we would want a object oriented drawing library. I >> think it should be completely value-based and algorithms should be >> templatized. > > You most definitely do not want to run the image-based algorithms like alpha > blending or the Porter-Duff composition modes in inline template code. You want > highly optimised, vector versions of them using the resources of the CPU and > GPU, and not inline. This is easily doable in a templated library with specialization or SFINAE (or better yet, concepts if already available). Can't see the problem with giving a generic programming API and I don't see how OO would help here. > You could call it a quality-of-implementation issue and allow the > implementation to use extern templates for the known and common image formats. > But I suggest that we *first* get the algorithms for what really matters > settled down, then we figure out how or if they should be made generic. Isn't it what Cairo has already done? What C++ needs is a generic drawing library, not another wrapper over cairo. IMO. > -- > Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org > Software Architect - Intel Open Source Technology Center > PGP/GPG: 0x6EF45358; fingerprint: > E067 918B B660 DBD1 105C 966C 33F5 F005 6EF4 5358 Regards, -- Felipe Magno de Almeida -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an email to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/. .