<div dir="ltr"><div>With all due respect, I think OpenGL on headless Windows is a slight distinction from what Andreas was asking for (OpenGL without a Windows desktop login session). Most people doing headless OpenGL at least have a Windows login session.</div><div><br></div>I was curious about the situation myself. We (myself, Nick and Per at Volvo Sweden just a few hours from Remograph) and the guys at DLR in Munich have all been pursuing headless OSG operation and context creation via EGL. The goal is multifold -- on Linux it would be nice to not have to have XWindows running. On other devices, it'd be nice to operate headless.<div><br></div><div>I don't know for sure if the EGL method would work on a Windows machine that doesn't have a logged-in desktop session.</div><div><br></div><div>As far as I recall, the old WinNT OpnGL Tubes (and friends) screen savers could operate prior to login on the login screen, by using the system display context, but I'm not sure if that tactic is applicable here, but it does suggest that somehow an OpenGL context could be created without a desktop session. Have you tried executing a simple (non-OSG) EGL demo executable in this situation? That would tell you if pursuing EGL to solve the problem is worth doing.</div><div><br></div><div>I put in a query to some friends who might know the answer firsthand, but haven't heard anything back. If you want to email me privately, I can try to keep you in touch. Were your requirements specific to a particular GPU platform (NVidia, AMD, etc) or does it need to be a vendor-agnostic solution? Some vendors provide enhancements that others don't have.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jul 5, 2019 at 12:55 PM Andreas Ekstrand <<a href="mailto:andreas.ekstrand@remograph.com">andreas.ekstrand@remograph.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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Thanks Chris! Guess I haven't googled generally enough - will look
around for more less-specific solutions.<br>
/Andreas<font size="2" color="black"><span style="font-size:0.8em;color:black"></span></font><br>
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<div class="gmail-m_4201649384849738635moz-cite-prefix">On 2019-07-04 01:15, Chris Djali wrote:<br>
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<pre class="gmail-m_4201649384849738635moz-quote-pre">Hi,
I don't want to be the guy that says "Go away and Google your problem", but I was curious and searched for OpenGL on headless Windows and saw a few results where people had managed to do it. Even if you don't find something compatible with your situation, you're likely to find more and better answers on a less-specific mailing list.
Sorry I couldn't give an actual answer,
Chris
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div style="text-align:center">Chris 'Xenon' Hanson, omo sanza lettere. Xenon@AlphaPixel.com <a href="http://www.alphapixel.com/" target="_blank">http://www.alphapixel.com/</a></div><div style="text-align:center">Training • Consulting • Contracting</div><div style="text-align:center">3D • Scene Graphs (Open Scene Graph/OSG) • OpenGL 2 • OpenGL 3 • OpenGL 4 • GLSL • OpenGL ES 1 • OpenGL ES 2 • OpenCL</div><div style="text-align:center"><span style="font-size:12.8px">Legal/IP •</span><span style="font-size:12.8px"> </span><span style="font-size:12.8px">Forensics •</span><span style="font-size:12.8px"> </span>Imaging <span style="font-size:12.8px">•</span><span style="font-size:12.8px"> </span><span style="font-size:12.8px">UAVs </span><span style="font-size:12.8px">• GIS • GPS • osgEarth • Terrain • Telemetry • Cryptography • LIDAR • Embedded • Mobile • iPhone/iPad/iOS • Android</span></div><div style="text-align:center"><a href="https://twitter.com/alphapixel" target="_blank">@alphapixel</a> <a href="http://facebook.com/alphapixel" target="_blank">facebook.com/alphapixel</a> (775) 623-PIXL [7495]<br></div></div></div></div></div></div>