DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:mime-version:from:date:message-id:subject:to
	:content-type; q=dns; s=default; b=nvYy2HwJHptP8SPvLdlA3qk8Y5DLn
	dYQZktHbzIaI+08yo/hbyTkG+ECRZowvFDTYQTnnS8E3J9ugdOEZt8uqBiDCmyPW
	AbvVyHAJ7SV6HdWnXZrr5Rg9WAQdnOj9EbamCAnCtxfk+6EKE35lP2S+32Ud4+Fv
	/U6moG8CmNrOsw=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
MIME-Version: 1.0
From: Chris Marshall <devel DOT chm DOT 01 AT gmail DOT com>
Date: Wed, 10 Oct 2018 12:15:17 -0700
Message-ID: <CAPTtex+HUf7-4+vF+dVRRhRBgPOT3H+a2B8nUGPp+Oj5FFZgxw@mail.gmail.com>
Subject: opengl render size too small in X11 window
To: cygwin AT cygwin DOT com
Content-Type: text/plain; charset="UTF-8"

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.

Thanks,
Chris

--
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