From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Andy Moreton Newsgroups: gmane.emacs.devel Subject: Re: Testing native image scaling Date: Wed, 27 Mar 2019 19:06:47 +0000 Message-ID: References: <83fttpat8p.fsf@gnu.org> <20190119214543.GA13967@breton.holly.idiocy.org> <834la3b9hd.fsf@gnu.org> <838sx0kzw9.fsf@gnu.org> <831s2skvld.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="97919"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (windows-nt) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Mar 27 20:07:33 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1h9Dtb-000PLP-TP for ged-emacs-devel@m.gmane.org; Wed, 27 Mar 2019 20:07:32 +0100 Original-Received: from localhost ([127.0.0.1]:52407 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h9Dta-0001me-Ti for ged-emacs-devel@m.gmane.org; Wed, 27 Mar 2019 15:07:30 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:39412) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h9Dt4-0001Yb-Kw for emacs-devel@gnu.org; Wed, 27 Mar 2019 15:06:59 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h9Dt3-0003Iv-LR for emacs-devel@gnu.org; Wed, 27 Mar 2019 15:06:58 -0400 Original-Received: from [195.159.176.226] (port=39708 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h9Dt3-0003Hn-CO for emacs-devel@gnu.org; Wed, 27 Mar 2019 15:06:57 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.89) (envelope-from ) id 1h9Dsy-000OYX-Sx for emacs-devel@gnu.org; Wed, 27 Mar 2019 20:06:52 +0100 X-Injected-Via-Gmane: http://gmane.org/ Cancel-Lock: sha1:jnSlCs08ngWxhf/TEeV5bvkC2Z8= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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" Xref: news.gmane.org gmane.emacs.devel:234791 Archived-At: On Wed 27 Mar 2019, Eli Zaretskii wrote: >> From: Andy Moreton >> Date: Wed, 27 Mar 2019 18:35:09 +0000 >> >> > It seems to work, but maybe I don't know what and how to check. Can >> > you show what I should expect to see with and without the :scale >> > attribute, in "emacs -Q"? >> >> I would expect a sliced image to be composed of a grid of tiled images >> instead of a single image, but to have the same visual appearance as the >> original image. The w32 code does not get this right. > > Did insert-sliced-image ever work on Windows, even before scaling was > added? > >> Adding the ":scale 0.5" argument scales down the tiled array of images >> correctly, but they still contain the same display artifacts as the >> sliced image without scaling. > > Thanks, but I asked for the _correct_ image I need to expect, because > I want something to compare to if/when I decide to try to fix this. Sorry - I thought that was clear. The following forms should all produce the same visual appearance in the buffer: (insert-image (create-image "splash.png" nil nil :scale 0.5)) (insert-sliced-image (create-image "splash.png" nil nil :scale 0.5) nil nil 1 1) (insert-sliced-image (create-image "splash.png" nil nil :scale 0.5) nil nil 3 5) The sliced images are displayed as an array of tiled smaller images, but should otherwise have the same appearance as the original (non-sliced) image. AndyM