From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#17483: 24.4.50; Emacs cannot display some gif images correctly under dark background Date: Tue, 13 May 2014 19:42:50 +0300 Message-ID: <83r43xpr3p.fsf@gnu.org> References: <8761laaz2t.fsf@gmail.com> Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1399999468 26529 80.91.229.3 (13 May 2014 16:44:28 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 13 May 2014 16:44:28 +0000 (UTC) Cc: 17483@debbugs.gnu.org To: "Tu, Do" Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue May 13 18:44:22 2014 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WkFoU-0004HL-Cv for geb-bug-gnu-emacs@m.gmane.org; Tue, 13 May 2014 18:44:22 +0200 Original-Received: from localhost ([::1]:46570 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WkFoT-00058p-Ug for geb-bug-gnu-emacs@m.gmane.org; Tue, 13 May 2014 12:44:21 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:33736) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WkFoK-00056I-FR for bug-gnu-emacs@gnu.org; Tue, 13 May 2014 12:44:18 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WkFoA-0005qw-Nj for bug-gnu-emacs@gnu.org; Tue, 13 May 2014 12:44:12 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:45089) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WkFoA-0005qn-KZ for bug-gnu-emacs@gnu.org; Tue, 13 May 2014 12:44:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1WkFoA-0001kN-4v for bug-gnu-emacs@gnu.org; Tue, 13 May 2014 12:44:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 13 May 2014 16:44:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 17483 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 17483-submit@debbugs.gnu.org id=B17483.13999993896605 (code B ref 17483); Tue, 13 May 2014 16:44:02 +0000 Original-Received: (at 17483) by debbugs.gnu.org; 13 May 2014 16:43:09 +0000 Original-Received: from localhost ([127.0.0.1]:34207 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1WkFnI-0001iS-Eu for submit@debbugs.gnu.org; Tue, 13 May 2014 12:43:08 -0400 Original-Received: from mtaout22.012.net.il ([80.179.55.172]:49794) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1WkFnD-0001ho-GZ for 17483@debbugs.gnu.org; Tue, 13 May 2014 12:43:05 -0400 Original-Received: from conversion-daemon.a-mtaout22.012.net.il by a-mtaout22.012.net.il (HyperSendmail v2007.08) id <0N5I00G00U6Z5000@a-mtaout22.012.net.il> for 17483@debbugs.gnu.org; Tue, 13 May 2014 19:42:56 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([87.69.4.28]) by a-mtaout22.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0N5I00GPXUFK4S10@a-mtaout22.012.net.il>; Tue, 13 May 2014 19:42:56 +0300 (IDT) In-reply-to: <8761laaz2t.fsf@gmail.com> X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 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-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:89024 Archived-At: > From: "Tu, Do" > Date: Tue, 13 May 2014 14:59:38 +0700 > > - emacs -q > - Choose any color theme with dark background: (load-theme 'tango-dark t) > - Download or open image at this url: http://www.openldap.org/doc/admin23/intro_tree.gif > > Result: The image is deformed. Background becomes very dark, the nodes become gray. This is not expected. ^^^^^^^^^^^^^^^^^^^^^ This is a well-known optical illusion: the same gray shade looks more bright on a darker background. If you use some tool that shows color pixels at certain screen location, you will see that the pixels are exactly identical to what you get on the default (light) background. There's no bug here.