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#47043: 27.1; transparent PNG image scaled larger may be blurred Date: Wed, 10 Mar 2021 15:41:13 +0100 Message-ID: <877dmfkr5i.fsf@gnus.org> References: <86im5z1b0z.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="9623"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: 47043@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 15:42:34 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 1lK02j-0002NF-OJ for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 10 Mar 2021 15:42:33 +0100 Original-Received: from localhost ([::1]:54142 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lK02i-0002LX-PO for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 10 Mar 2021 09:42:32 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:38834) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lK02E-0002Ac-B4 for bug-gnu-emacs@gnu.org; Wed, 10 Mar 2021 09:42:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:37903) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lK02E-0007MG-3h for bug-gnu-emacs@gnu.org; Wed, 10 Mar 2021 09:42:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1lK02E-0006rm-0b for bug-gnu-emacs@gnu.org; Wed, 10 Mar 2021 09:42:02 -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 14:42:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 47043 X-GNU-PR-Package: emacs Original-Received: via spool by 47043-submit@debbugs.gnu.org id=B47043.161538728526331 (code B ref 47043); Wed, 10 Mar 2021 14:42:01 +0000 Original-Received: (at 47043) by debbugs.gnu.org; 10 Mar 2021 14:41:25 +0000 Original-Received: from localhost ([127.0.0.1]:49445 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lK01d-0006qc-DL for submit@debbugs.gnu.org; Wed, 10 Mar 2021 09:41:25 -0500 Original-Received: from quimby.gnus.org ([95.216.78.240]:35000) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lK01a-0006qI-TZ for 47043@debbugs.gnu.org; Wed, 10 Mar 2021 09:41:23 -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=6XBJeRR69S2/pti1T5JCJlvfUJbVgDXfdbavmIDe5P4=; b=HxgyDVcJnEEMfkUmSg5g7z+sBW AE+AQODtbf2lmZSDnobSXdswmXtiVcsIwZmtCsf1smrwPlEfXOYpuVvoibRC0gaNPSP9EGNA1bf/6 VOKWj7EpiZq0U4muVO2KL2LJ05h2Rl1E2RXm993nGwR2fRemFiBt5OXXY55ik6mrGaNA=; 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 1lK01S-0004If-C9; Wed, 10 Mar 2021 15:41:16 +0100 X-Now-Playing: Siouxsie and the Banshees's _The Scream_: "Switch" In-Reply-To: <86im5z1b0z.fsf@gmail.com> (ynyaaa@gmail.com's message of "Wed, 10 Mar 2021 20:52:12 +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:201990 Archived-At: ynyaaa@gmail.com writes: > When a transparent PNG image is scaled larger, it may be displayed as a > blurred image. > > The attached image transparent3.png is a green square with red dots. > Its alpha values change one by one from left to right with step 1. > transparent4.png is a similar image whose alpha values are floored into > multiples of four. In Emacs 27.1, scaling images upwards always blur them. This has been changed in Emacs 28. There's further work being done in this area, though -- blurring may be reintroduced in some use cases, but this specific problem has been fixed, so I'm closing this bug report. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no