From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.bugs Subject: bug#47040: 27.1; PNG binary transparency is ignored Date: Wed, 10 Mar 2021 16:05:25 +0100 Message-ID: <87czw7jbgq.fsf@gnus.org> References: <86o8fr1e3d.fsf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="10906"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: 47040@debbugs.gnu.org To: ynyaaa@gmail.com Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Mar 10 16:07:18 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lK0Qe-0002fj-Sh for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 10 Mar 2021 16:07:16 +0100 Original-Received: from localhost ([::1]:36646 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lK0Qd-00035K-Tp for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 10 Mar 2021 10:07:15 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:44872) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lK0PT-0002Uw-FF for bug-gnu-emacs@gnu.org; Wed, 10 Mar 2021 10:06:03 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:39990) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lK0PT-0004jY-6Z for bug-gnu-emacs@gnu.org; Wed, 10 Mar 2021 10:06:03 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1lK0PT-0003lB-15 for bug-gnu-emacs@gnu.org; Wed, 10 Mar 2021 10:06:03 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Lars Ingebrigtsen Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 10 Mar 2021 15:06:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 47040 X-GNU-PR-Package: emacs Original-Received: via spool by 47040-submit@debbugs.gnu.org id=B47040.161538873814393 (code B ref 47040); Wed, 10 Mar 2021 15:06:02 +0000 Original-Received: (at 47040) by debbugs.gnu.org; 10 Mar 2021 15:05:38 +0000 Original-Received: from localhost ([127.0.0.1]:51531 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lK0P4-0003k5-2K for submit@debbugs.gnu.org; Wed, 10 Mar 2021 10:05:38 -0500 Original-Received: from quimby.gnus.org ([95.216.78.240]:35534) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lK0P1-0003jq-Sx for 47040@debbugs.gnu.org; Wed, 10 Mar 2021 10:05:36 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To: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=/pXTBWSRNlKG8wn1eCHgIBfyMr834LbauAJJHzbPv5E=; b=MGU/c4si8XNcGwLDw0SrAVPgtF +co/CGtGsCOOCykHN2jBpnm3f155fDHPUfkXRuh1RCwsZXXJOWRB5gEnDWWQd3hVps5J0hZW7PjGZ b3AT0DZCZZNy08ZZ+Z1W8gXeV7fIZ4X1OaTI8HsKEKsev4gIxOAkKQv3Kpk9OYKX5+3w=; Original-Received: from cm-84.212.220.105.getinternet.no ([84.212.220.105] helo=xo) by quimby.gnus.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lK0Ot-0004XZ-HU; Wed, 10 Mar 2021 16:05:29 +0100 X-Now-Playing: Siouxsie and the Banshees's _Join Hands_: "Premature Burial" In-Reply-To: <86o8fr1e3d.fsf@gmail.com> (ynyaaa@gmail.com's message of "Wed, 10 Mar 2021 19:45:58 +0900") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:201996 Archived-At: ynyaaa@gmail.com writes: > Red pixels in the both images have 0 for alpha value, so they should be > transparent and invisible, but transparent1.png is displayed as a red > square with a green frame in a emacs buffer. > > transparent2.png is displayed as a white square with a green frame as > expected. > > When they are displayed in a chrome browser, inner squares of the both > images are displayed as transparent. I'm unable to reproduce this in Emacs 27.1 in Debian/bullseye, so this may be a Windows-specific problem. It may also be fixed in Emacs 28, since the transparency code has gotten a lot of work. Would it be possible for you to check in Emacs 28 whether this problem is still present there? If not, can somebody else with Windows and Emacs 28 check whether the problem is still present? -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no