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: Sat, 24 Aug 2019 23:52:32 -0500 Message-ID: <5136.20784.40920.23906@gargle.gargle.HOWL> References: <5b006777-5e97-a641-6f93-83a437ca9ca7@cs.ucla.edu> <44134.15891.158963.23904@gargle.gargle.HOWL> <9c4c68ebe20cbcc44763be8e72bd25eb.squirrel@weber.math.s.chiba-u.ac.jp> 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="86649"; mail-complaints-to="usenet@blaine.gmane.org" Cc: 37153@debbugs.gnu.org, Paul Eggert To: mituharu@math.s.chiba-u.ac.jp Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sun Aug 25 06:53:11 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 1i1kWc-000MQ6-W0 for geb-bug-gnu-emacs@m.gmane.org; Sun, 25 Aug 2019 06:53:11 +0200 Original-Received: from localhost ([::1]:40690 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i1kWb-00050K-Fh for geb-bug-gnu-emacs@m.gmane.org; Sun, 25 Aug 2019 00:53:09 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:48454) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i1kWV-0004zz-Lm for bug-gnu-emacs@gnu.org; Sun, 25 Aug 2019 00:53:04 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i1kWU-0007bl-Kq for bug-gnu-emacs@gnu.org; Sun, 25 Aug 2019 00:53:03 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:34615) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1i1kWU-0007be-I8 for bug-gnu-emacs@gnu.org; Sun, 25 Aug 2019 00:53:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1i1kWU-0004gU-Ex for bug-gnu-emacs@gnu.org; Sun, 25 Aug 2019 00:53:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: "Roland Winkler" Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 25 Aug 2019 04:53:02 +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=B37153.156670876417981 (code B ref 37153); Sun, 25 Aug 2019 04:53:02 +0000 Original-Received: (at 37153) by debbugs.gnu.org; 25 Aug 2019 04:52:44 +0000 Original-Received: from localhost ([127.0.0.1]:43436 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1i1kWB-0004fv-NA for submit@debbugs.gnu.org; Sun, 25 Aug 2019 00:52:43 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:39923) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1i1kW9-0004fh-Hx for 37153@debbugs.gnu.org; Sun, 25 Aug 2019 00:52:42 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:44361) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1i1kW1-0007Jn-BF; Sun, 25 Aug 2019 00:52:35 -0400 Original-Received: from [2602:30a:2e52:d720:65b7:1416:12e7:8bfb] (port=53216 helo=regnitz) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1i1kW0-0004wy-W5; Sun, 25 Aug 2019 00:52:33 -0400 In-Reply-To: <9c4c68ebe20cbcc44763be8e72bd25eb.squirrel@weber.math.s.chiba-u.ac.jp> 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:165796 Archived-At: On Sat Aug 24 2019 mituharu@math.s.chiba-u.ac.jp wrote: > I suspect there is a longstanding typo (or thinko) in PNG > transparency handling code. It may be helpful to check the "official" test-suite for PNG http://www.schaik.com/pngsuite2011/pngsuite.html which contains also png files with transparency http://www.schaik.com/pngsuite2011/pngsuite_trn_png.html Somehow emacs ignores the transparency for image type png, see for example the file tm3n3p02.png with multiple levels of transparency. Transparency is honored for these images when emacs uses imagemagick.