From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: "Roland Winkler" Newsgroups: gmane.emacs.bugs Subject: bug#37153: 26.1; some png images scrambled Date: Fri, 23 Aug 2019 22:17:58 -0500 Message-ID: <44134.15891.158963.23904@gargle.gargle.HOWL> References: <5b006777-5e97-a641-6f93-83a437ca9ca7@cs.ucla.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="56354"; mail-complaints-to="usenet@blaine.gmane.org" Cc: 37153@debbugs.gnu.org To: Paul Eggert Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Aug 24 05:19:10 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1i1Ma6-000EXU-08 for geb-bug-gnu-emacs@m.gmane.org; Sat, 24 Aug 2019 05:19:10 +0200 Original-Received: from localhost ([::1]:35796 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i1Ma4-0007RJ-UW for geb-bug-gnu-emacs@m.gmane.org; Fri, 23 Aug 2019 23:19:08 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:42415) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i1MZz-0007RD-9i for bug-gnu-emacs@gnu.org; Fri, 23 Aug 2019 23:19:04 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i1MZy-0006If-AX for bug-gnu-emacs@gnu.org; Fri, 23 Aug 2019 23:19:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:60879) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1i1MZy-0006IW-7a for bug-gnu-emacs@gnu.org; Fri, 23 Aug 2019 23:19:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1i1MZy-0006dD-1d for bug-gnu-emacs@gnu.org; Fri, 23 Aug 2019 23:19:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: "Roland Winkler" Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 24 Aug 2019 03:19:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 37153 X-GNU-PR-Package: emacs Original-Received: via spool by 37153-submit@debbugs.gnu.org id=B37153.156661668725429 (code B ref 37153); Sat, 24 Aug 2019 03:19:02 +0000 Original-Received: (at 37153) by debbugs.gnu.org; 24 Aug 2019 03:18:07 +0000 Original-Received: from localhost ([127.0.0.1]:41467 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1i1MZ4-0006c5-UF for submit@debbugs.gnu.org; Fri, 23 Aug 2019 23:18:07 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:33855) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1i1MZ2-0006bZ-He for 37153@debbugs.gnu.org; Fri, 23 Aug 2019 23:18:05 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:56285) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1i1MYx-0005lq-EB; Fri, 23 Aug 2019 23:17:59 -0400 Original-Received: from [2602:30a:2e52:d720:65b7:1416:12e7:8bfb] (port=50884 helo=regnitz) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1i1MYx-0007ZE-2u; Fri, 23 Aug 2019 23:17:59 -0400 In-Reply-To: <5b006777-5e97-a641-6f93-83a437ca9ca7@cs.ucla.edu> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:165741 Archived-At: On Fri Aug 23 2019 Paul Eggert wrote: > Do you see the same problem when using Emacs master? If not, then > perhaps we can just marked the bug as fixed in the next release. The problem with my test png image is that it has transparent parts that need to be displayed with a light color so that one can recognize the nontransparent dark parts. But the image uses fully transparent black as background. The behavior in such a case is not strictly defined by the png standard, see https://sourceforge.net/p/png-mng/mailman/message/36747189/ Emacs displays such fully transparent background with its original color specified by the image. But I believe it would make more sense if emacs used instead a background color that the user can choose (the background color of the frame), similar to, for example, eog. Should I submit a separate feature request for this?