From mboxrd@z Thu Jan 1 00:00:00 1970 Path: main.gmane.org!not-for-mail From: David Kastrup Newsgroups: gmane.emacs.devel Subject: Several suggestions for image support Date: 16 Apr 2004 02:21:11 +0200 Sender: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Message-ID: NNTP-Posting-Host: deer.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: sea.gmane.org 1082075049 1858 80.91.224.253 (16 Apr 2004 00:24:09 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Fri, 16 Apr 2004 00:24:09 +0000 (UTC) Original-X-From: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Fri Apr 16 02:24:02 2004 Return-path: Original-Received: from quimby.gnus.org ([80.91.224.244]) by deer.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 1BEH9F-0003p9-00 for ; Fri, 16 Apr 2004 02:24:01 +0200 Original-Received: from monty-python.gnu.org ([199.232.76.173]) by quimby.gnus.org with esmtp (Exim 3.35 #1 (Debian)) id 1BEH9F-0004Dq-00 for ; Fri, 16 Apr 2004 02:24:01 +0200 Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.30) id 1BEH74-0002MS-2h for emacs-devel@quimby.gnus.org; Thu, 15 Apr 2004 20:21:46 -0400 Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.30) id 1BEH6y-0002L9-UW for emacs-devel@gnu.org; Thu, 15 Apr 2004 20:21:40 -0400 Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.30) id 1BEH6S-0001uB-Ph for emacs-devel@gnu.org; Thu, 15 Apr 2004 20:21:39 -0400 Original-Received: from [199.232.76.164] (helo=fencepost.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.30) id 1BEH6S-0001tr-DT for emacs-devel@gnu.org; Thu, 15 Apr 2004 20:21:08 -0400 Original-Received: from fencepost.gnu.org ([127.0.0.1] helo=lola.goethe.zz) by fencepost.gnu.org with esmtp (Exim 4.24) id 1BEH5v-0006eN-UJ for emacs-devel@gnu.org; Thu, 15 Apr 2004 20:20:36 -0400 Original-To: emacs-devel@gnu.org Original-Lines: 19 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.4 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Xref: main.gmane.org gmane.emacs.devel:21723 X-Report-Spam: http://spam.gmane.org/gmane.emacs.devel:21723 PNG images support transparency. Emacs can't make use of it. You can only have Emacs declare a particular color as transparent. This is dissatisfactory. It should tell the PNG decoding routines Emacs' background color for the purpose of transparency. I would find it important if an image specifier could restrict the displayed portion of an image. The reason is that large images always appear as a single big character to Emacs. If I could split such an image into a bunch of smaller images, I could walk through it with the cursor. But it should only be necessary to instantiate the complete image itself once for this purpose. Of course, one should find a way that does not cause all of the subimages to be entered separately into the image cache. -- David Kastrup, Kriemhildstr. 15, 44793 Bochum