MESSAGE
DATE | 2021-05-18 |
FROM | Michael Drake
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SUBJECT | Re: [Hangout - NYLXS] [png-mng-implement] Getting APNG support into
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From hangout-bounces-at-nylxs.com Tue May 18 16:18:07 2021 Return-Path: X-Original-To: archive-at-mrbrklyn.com Delivered-To: archive-at-mrbrklyn.com Received: from www2.mrbrklyn.com (www2.mrbrklyn.com [96.57.23.82]) by mrbrklyn.com (Postfix) with ESMTP id 08E2B163FB5; Tue, 18 May 2021 16:18:05 -0400 (EDT) X-Original-To: hangout-at-www2.mrbrklyn.com Delivered-To: hangout-at-www2.mrbrklyn.com Received: by mrbrklyn.com (Postfix, from userid 1000) id C13B8163FB3; Tue, 18 May 2021 16:17:57 -0400 (EDT) Resent-From: Ruben Safir Resent-Date: Tue, 18 May 2021 16:17:57 -0400 Resent-Message-ID: <20210518201757.GA6750-at-www2.mrbrklyn.com> Resent-To: hangout-at-mrbrklyn.com X-Original-To: ruben-at-mrbrklyn.com Delivered-To: ruben-at-mrbrklyn.com Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) by mrbrklyn.com (Postfix) with ESMTP id CE531163FAC for ; Tue, 18 May 2021 15:41:33 -0400 (EDT) Received: from [127.0.0.1] (helo=sfs-ml-2.v29.lw.sourceforge.com) by sfs-ml-2.v29.lw.sourceforge.com with esmtp (Exim 4.92.3) (envelope-from ) id 1lj5ab-0003CX-21; Tue, 18 May 2021 19:41:13 +0000 Received: from [172.30.20.202] (helo=mx.sourceforge.net) by sfs-ml-2.v29.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92.3) (envelope-from ) id 1lj5aY-0003CM-VL for png-mng-implement-at-lists.sourceforge.net; Tue, 18 May 2021 19:41:10 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Type:To:Subject:Message-ID:Date:From: In-Reply-To:References:MIME-Version:Sender:Reply-To:Cc: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=4EY7zv+k4WpGihzMgo2Zf9UOTN+JyTtKBnqgysdm74w=; b=LI7qgwsNlpg44gxzl6PmEOy7C IxrMdGXngcwYb2aR2JwaGsveHy3fNUbtqc99hSFVJYgSy1RhyKwveTLd10ggYkld65qjlebaovGFp +3pXqwNQp9FNslfBOUbBDCjM7Cd4WqCndokipm7B3lEoj3ZlQUeGwdhERZ69Y4kSEbhog=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Type:To:Subject:Message-ID:Date:From:In-Reply-To:References: MIME-Version:Sender:Reply-To:Cc:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=4EY7zv+k4WpGihzMgo2Zf9UOTN+JyTtKBnqgysdm74w=; b=S5GDUOuz8FFKNSHHkLWGOHm2Ut w7/7qdgVnd7XmMe9n7WeFqTjwTOg8KLWPgxRGB02QXz7yevVDWJQuD1lONKyY9hFMCYqypYq0bWys bUGKsISEFa2qH2hnoltP2JAjU7Y24Nwt8N1MBNMIUJ8YcdIyJHFqEd3j8hEW0Ryic4nI=; Received: from yaffle.pepperfish.net ([88.99.213.221]) by sfi-mx-1.v28.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92.2) id 1lj5aI-00Cypm-SM for png-mng-implement-at-lists.sourceforge.net; Tue, 18 May 2021 19:41:11 +0000 Received: from mail.pepperfish.net (unknown [10.112.101.28]) by yaffle.pepperfish.net (Postfix) with ESMTP id 57D79419E6 for ; Tue, 18 May 2021 20:40:48 +0100 (BST) Received: from mail-ua1-f47.google.com ([209.85.222.47]) by mail.pepperfish.net with esmtpsa (Exim 4.92 #3 (Debian)) id 1lj5aC-0004Ir-9J for ; Tue, 18 May 2021 20:40:48 +0100 Received: by mail-ua1-f47.google.com with SMTP id a12so3621264uak.6 for ; Tue, 18 May 2021 12:40:48 -0700 (PDT) X-Gm-Message-State: AOAM531KFqf9P+HeLEjfd3eW6qc9HTSxB6wDqn4eGqQqYuV6yS+1Tjxd /hIniquiuSK9HAWPry05W+Mw7Rcx0KhqrOrpAQ== X-Google-Smtp-Source: ABdhPJwRtPH3HKM+gTJTRKEVkosN4DldSe8gZ/aWdF4CLflMx0YZ2MaXedFGNwBqY3FqcaYa4iQiMz8+WCiP3fW2RDk= X-Received: by 2002:a9f:2183:: with SMTP id 3mr8537164uac.0.1621366844643; Tue, 18 May 2021 12:40:44 -0700 (PDT) MIME-Version: 1.0 References: <2aa122e7-1bc0-e2e0-747b-dc0f72479ba0-at-w3.org> <3af94793-b1ff-e8a1-0cb3-6b5f266fa5b1-at-w3.org> In-Reply-To: <3af94793-b1ff-e8a1-0cb3-6b5f266fa5b1-at-w3.org> From: Michael Drake Date: Tue, 18 May 2021 20:40:33 +0100 X-Gmail-Original-Message-ID: Message-ID: To: "PNG/MNG implementation discussion list" X-Pepperfish-Transaction: 7a70-acc8-f652-3e33 X-Pepperfish-Transaction-By: mail X-Spam-Score: 0.0 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-Headers-End: 1lj5aI-00Cypm-SM X-BeenThere: png-mng-implement-at-lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list Subject: Re: [Hangout - NYLXS] [png-mng-implement] Getting APNG support into libpng X-BeenThere: hangout-at-nylxs.com List-Id: NYLXS Tech Talk and Politics List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: PNG/MNG implementation discussion list Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: hangout-bounces-at-nylxs.com Sender: "Hangout"
On Tue, 18 May 2021 at 16:32, Chris Lilley wrote: > On 2021-05-05 23:42, Bob Friesenhahn wrote: > > The level of support in browsers is interesting. I did not know that. > > > I have not read the patch. What is the nature of the patch? Is it > > offered under a license compatible with the libpng license? > > My understanding is that there are multiple unofficial patches.
I believe the standard APNG patch is from here:
https://sourceforge.net/projects/libpng-apng/
It's needed to build Firefox and you can see it applied in all sorts of Linux distributions, e.g. Linux From Scratch[1], Debian[2], and Arch[3].
1. https://www.linuxfromscratch.org/blfs/view/svn/general/libpng.html 2. https://sources.debian.org/patches/libpng1.6/1.6.37-3/libpng-1.6.37-apng.patch/ 3. https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=libpng-apng#n21
Best regards, Michael
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