From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 33560 invoked by alias); 16 Nov 2019 17:03:47 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 33549 invoked by uid 89); 16 Nov 2019 17:03:46 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-3.4 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.1 spammy=cygwin-apps@cygwin.com, U*cygwin-apps, cygwinappscygwincom, sendemail X-HELO: smtp-out-so.shaw.ca Received: from smtp-out-so.shaw.ca (HELO smtp-out-so.shaw.ca) (64.59.136.138) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Sat, 16 Nov 2019 17:03:43 +0000 Received: from [192.168.1.114] ([24.64.172.44]) by shaw.ca with ESMTP id W1U4iPhiLRnrKW1U5iE4fS; Sat, 16 Nov 2019 10:03:41 -0700 Reply-To: Brian.Inglis@SystematicSw.ab.ca Subject: Re: XWin can't hold OpenGL picture, has WS_DISABLED and WS_EX_TRANSPARENT styles? To: cygwin@cygwin.com References: <345212924.4774581.1573291267579.JavaMail.zimbra@wildblue.net> <1603999286.4785804.1573292952544.JavaMail.zimbra@wildblue.net> <1501149975.8378096.1573630073765.JavaMail.zimbra@wildblue.net> <1343504374.11717315.1573911582968.JavaMail.zimbra@wildblue.net> From: Brian Inglis Openpgp: preference=signencrypt Message-ID: <7a058049-2c11-db12-32ce-1b09d735921b@SystematicSw.ab.ca> Date: Sat, 16 Nov 2019 17:31:00 -0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: <1343504374.11717315.1573911582968.JavaMail.zimbra@wildblue.net> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2019-11/txt/msg00103.txt.bz2 On 2019-11-16 06:39, Mick Pearson wrote: > On Wednesday, November 13, 2019 1:27:53 AM, Mick Pearson wrote: >> On Saturday, November 9, 2019 3:49:12 AM, Mick Pearson wrote: >>>> XWin has never had a permanent picture with OpenGL. Any movement "damages" all >>>> windows. I know I've looked at it before, but I checked its window/class styles >>>> with MS's Spy++ tool today. The normal styles that govern clipping and >>>> permanence look fine, but it has some weird styles that normally for disabled >>>> and transparent windows that I wonder are the cause for its abnormal behavior >>>> in this regard. No OpenGL apps that just draw only OpenGL on a window have >>>> XWin's problem. >>>> >>>> To be brief, it has these unnatural window-styles in this mail's subject line. >>>> Other than that, I think it may use Direct3D instead of OpenGL, but normally >>>> drawing OpenGL or Direct3D onto plain windows doesn't clobber other windows. I >>>> mean, you have to work hard to make it do something like that. >>>> >>>> A second, unrelated, oddity is the window decorations are sometimes classic >>>> style, and sometimes current style. It's very odd. It's random in the same >>>> session. The windows seem to undergo a transition from classic to current, but >>>> get stuck in classic sometimes. Maybe they are using the old "animated" show >>>> functions that didn't survive the version of Windows that introduced them. >>>> >>>> Niggling things like this could be fixed. But I don't know how many people use >>>> Cygwin. I've used it a lot over the years myself, to do development work. XWin >>>> is the most stable X server. Others don't really get close. But it's kind of >>>> too comfortable with its crumminess too. Not that I'm going to shove my work >>>> aside to try to remedy it myself. >>> WS_EX_TRANSPARENT styles? >>> P.S. Sorry to add, the WM_ERASEBKGND message occurred to me, or setting >>> the class-background to the "null" brush is a likely culprit. It is >>> behaving like a front-buffered old-fashioned application somewhat. >>> Clipping and own-DC style should prevent damage, but I don't know, >>> something seems to be responding to PAINT like events, that don't make >>> sense for OpenGL. >> I think I meant to include this>> (https://sourceware.org/bugzilla/show_bug.cgi?id=25170) link that includes >> this link:>> >> https://www.mail-archive.com/search?l=cygwin-xfree@cygwin.com&q=subject:"Re\%3A+Probable+bug+in+WGL+implementation+\(AIGLX\)+of+GLX+calls+in+XWin+\-wgl"&o=newest&f=1 >> >> I was too zealous to be brief, and I think now the window styles are a red >> herring. In any case the problems arise in "overdraw" scenarios wherein a >> window passes over the OpenGL windows, that is when the background is >> "erased" and the picture is lose (not held) which makes it impossible to >> use XWin for anything but one screen demonstrations of graphical effects.>> Some applications use multiple windows and do rendering with OpenGL instead >> of GTK widgets for example. Those can't use XWin. I think OpenGL doesn't >> work with MS Windows X servers. I hope it works with Linux ones.>> >> The other X servers available to Windows are in disarray with regard to >> OpenGL.>> So it would be good if one of them could be made to work. XWin is closest >> since it doesn't crash and does draw correctly other than it can't hold a >> picture. > I've put forward a patch > (https://sourceware.org/bugzilla/show_bug.cgi?id=25170) to this for anyone > interested. I'll explore putting it elsewhere, but I really think these > mailing lists are an albatross, not sure I want to join another. As everyone is a volunteer with little free time, Cygwin no longer uses sourceware/bugzilla, it uses mailing lists and git format-patch/send-email patches, to make it quick and easy for committers to apply with git am. Please submit app patches to cygwin-apps@cygwin.com in git format-patch/send-email format (with --cover-letter if a patch series). -- Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada This email may be disturbing to some readers as it contains too much technical detail. Reader discretion is advised. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple