From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Jason Rumney Newsgroups: gmane.emacs.devel Subject: Re: PNG image files with alpha channel Date: Thu, 08 May 2008 13:05:03 +0100 Message-ID: <4822EC6F.6000703@gnu.org> References: <87ve1pdnjq.fsf@stupidchicken.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1210248359 16218 80.91.229.12 (8 May 2008 12:05:59 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 8 May 2008 12:05:59 +0000 (UTC) Cc: emacs-devel@gnu.org, Miles Bader To: Chong Yidong Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu May 08 14:06:36 2008 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1Ju4t4-0000Jw-Jj for ged-emacs-devel@m.gmane.org; Thu, 08 May 2008 14:06:14 +0200 Original-Received: from localhost ([127.0.0.1]:57039 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Ju4sM-0005jV-Hf for ged-emacs-devel@m.gmane.org; Thu, 08 May 2008 08:05:30 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Ju4s9-0005iw-8z for emacs-devel@gnu.org; Thu, 08 May 2008 08:05:17 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Ju4s7-0005ik-PU for emacs-devel@gnu.org; Thu, 08 May 2008 08:05:17 -0400 Original-Received: from [199.232.76.173] (port=38696 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Ju4s7-0005ig-L8 for emacs-devel@gnu.org; Thu, 08 May 2008 08:05:15 -0400 Original-Received: from mk-outboundfilter-4.mail.uk.tiscali.com ([212.74.114.32]:49748) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1Ju4s2-00052w-Vl; Thu, 08 May 2008 08:05:11 -0400 Original-X-Trace: 76784844/mk-outboundfilter-2.mail.uk.tiscali.com/F2S/$ACCEPTED/freedom2Surf-customers/83.67.23.108 X-SBRS: None X-RemoteIP: 83.67.23.108 X-IP-MAIL-FROM: jasonr@gnu.org X-IP-BHB: Once X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AqsEAA6JIkhTQxds/2dsb2JhbACBU6pA X-IP-Direction: IN Original-Received: from i-83-67-23-108.freedom2surf.net (HELO wanchan.jasonrumney.net) ([83.67.23.108]) by smtp.f2s.tiscali.co.uk with ESMTP; 08 May 2008 13:05:09 +0100 Original-Received: from [192.168.249.27] (chiko.jasonrumney.net [192.168.249.27]) by wanchan.jasonrumney.net (Postfix) with ESMTP id 5D2871488; Thu, 8 May 2008 13:05:07 +0100 (BST) User-Agent: Thunderbird 2.0.0.14 (Windows/20080421) In-Reply-To: <87ve1pdnjq.fsf@stupidchicken.com> X-Enigmail-Version: 0.95.6 OpenPGP: id=8086879D X-detected-kernel: by monty-python.gnu.org: Genre and OS details not recognized. X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:96770 Archived-At: Chong Yidong wrote: > Hmm, I'm not sure what's wrong with this image. For an example of a png > image with alpha background rendered correctly in Emacs, see > > http://www.w3.org/Graphics/PNG/alphatest.png > Merely loading it into Gimp and saving it seems to be enough to fix the problem (even with the options "Save background color" and "Save color values from transparent pixels" ticked). So it must be something in the details of how Gimp saves transparency info vs the software Miles used.