From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Camm Maguire Newsgroups: gmane.emacs.devel Subject: fast image paging Date: Mon, 11 Nov 2013 15:08:47 -0500 Message-ID: <87mwlabt0w.fsf@happiness.m.enhanced.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1384200636 9646 80.91.229.3 (11 Nov 2013 20:10:36 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 11 Nov 2013 20:10:36 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Nov 11 21:10:40 2013 Return-path: Envelope-to: ged-emacs-devel@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 1Vfxol-0007sQ-7a for ged-emacs-devel@m.gmane.org; Mon, 11 Nov 2013 21:10:39 +0100 Original-Received: from localhost ([::1]:39420 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vfxok-0000jN-KX for ged-emacs-devel@m.gmane.org; Mon, 11 Nov 2013 15:10:38 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:38858) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vfxob-0000iw-98 for emacs-devel@gnu.org; Mon, 11 Nov 2013 15:10:34 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VfxoW-0007Yf-3o for emacs-devel@gnu.org; Mon, 11 Nov 2013 15:10:29 -0500 Original-Received: from nat-tvwna-outside-visitornet2-d-197.princeton.org ([66.180.183.209]:51109 helo=happiness.m.enhanced.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VfxoV-0007YZ-WA for emacs-devel@gnu.org; Mon, 11 Nov 2013 15:10:24 -0500 Original-Received: from camm by happiness.m.enhanced.com with local (Exim 4.80) (envelope-from ) id 1Vfxmx-0001Bs-8C for emacs-devel@gnu.org; Mon, 11 Nov 2013 15:08:47 -0500 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 66.180.183.209 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:165179 Archived-At: Greetings! I have a djvu mode which is designed for scholars reading, annotating, and cross-referencing many large documents. Right now I use pbm formats and create-image. This makes it easy to highlight and correlate pixels with text, but the images can get quite large, making handling sluggish on slower machines. Will I improve anything here using a compressed format like png? Or, when emacs displays and moves the image, does it decompress the image anyway into the same sized internal data structure? Take care, -- Camm Maguire camm@maguirefamily.org ========================================================================== "The earth is but one country, and mankind its citizens." -- Baha'u'llah