From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 123842 invoked by alias); 14 Oct 2018 18:02:10 -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 123832 invoked by uid 89); 14 Oct 2018 18:02:09 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=0.8 required=5.0 tests=AWL,BAYES_50,FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=no version=3.3.2 spammy=laptop, rendered, opengl, graphics X-HELO: mail-yb1-f171.google.com Received: from mail-yb1-f171.google.com (HELO mail-yb1-f171.google.com) (209.85.219.171) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Sun, 14 Oct 2018 18:02:07 +0000 Received: by mail-yb1-f171.google.com with SMTP id o8-v6so6681279ybk.13 for ; Sun, 14 Oct 2018 11:02:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=2RMThh/KNAGyL1HMdvgondBbSK53soKRCz7+5cKypUY=; b=IZEHZOGSTJmjS5iu/Lp0Aljfwyr/QbHUeAxsQL7gBSlzKmSJiu3GMlV8sdpKCcXZYg H/dq9ydReHagSqkSpyz5jlNpH9/aEIcdYr8Zevf3GYjcLjemklN6NOqbiP/DL0g5uJGU 4/Iwdr24bOPvYdSm82jrtqyQDHL8Gi3HCy+3Z0QjEFs29XNVvMJOHLBCqCCKWnodhg+C 2RFYeyfPIzBaQEis2B5ZzE/bpB43cCAx+Ac/Qt3/P2spSV7dggY/PR6cS9l7YYbzBecm 8MfiBfpFRAbRdBqqHg9EgRI/UvTmf+hB3WaGiflj6eD0a11TWKCCrqJh+i31XkQbjJSk ok1w== MIME-Version: 1.0 References: In-Reply-To: From: Chris Marshall Date: Sun, 14 Oct 2018 18:02:00 -0000 Message-ID: Subject: Re: opengl render size too small in X11 window To: cygwin@cygwin.com Content-Type: text/plain; charset="UTF-8" X-IsSubscribed: yes X-SW-Source: 2018-10/txt/msg00114.txt.bz2 Will do. On Sun, Oct 14, 2018 at 10:13 AM Jon Turney wrote: > On 11/10/2018 18:40, Chris Marshall wrote: > > I've verified that if I use the -nowgl option for the X11 server then the > > opengl visualization is correctly rendered and sized for the containing > > window. > > > > On Wed, Oct 10, 2018 at 12:15 PM Chris Marshall > > wrote: > > > >> Dear Cygwin- > >> > >> Using cygwin X11 under windows 10 with a high dpi display (3840x2160) > >> laptop resulted in far too small font and widgets using -multiwindow for > >> the XWin option. If I set the windows setting display resolution to > >> 1920x1080 and following the suggestion for the ~/.Xresources file from > >> > https://stackoverflow.com/questions/42211564/cygwin-xwin-scaling-broken-when-using-windows-scaling-on-high-resolution-displa > >> I was able keep windows, widgets, and title/menu bars at a reasonable > size > >> for reading. > >> > >> However, when I display some OpenGL graphics content (using a FreeGLUT > >> window), then the visible OpenGL rendered area is about 2/3 the apparent > >> widget area of the X11 window. If I try the same in a non-multiwindow > Xwin > >> session then the rendered area is correct. This problem is even worse > if I > >> try with the full screen resolution. At the moment I think I have > narrowed > >> it down to the -multiwindow support for OpenGL contexts. > >> > >> This is with a couple of versions of the freeglut libraries with no > effect > >> and the current cygwin and cygwin X Server. > > Interesting. Thanks for reporting this issue. > > I suspect this might be caused by: > > - the X server is marked as high-dpi aware (via manifest) > - when using WGL, OpenGL drawing takes place in the client (to a window > handle retrieved from the X server) > - the GL client you are using is not marked as high-dpi aware (the default) > > (-wgl is only currently supported in multiwindow mode) > > If that's the case, I think I see what is needed to fix this, but this > is not possible for me to test. > > I've built an updated libGL1 with this potential fix, perhaps you can > try it, to see if it improves things. Install it with: > > wget ftp://cygwin.com/pub/cygwinx/x86_64/libGL1-18.0.5-1.1.tar.xz > tar -C / -xvf libGL1-18.0.5-1.1.tar.xz > > (This is built for x86_64. If you need x86 instead, please ask) > > Reinstall the libGL1 using cygwin setup to get things back to their > previous state. > > -- > Jon Turney > Volunteer Cygwin/X X Server maintainer > -- 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