<html><head></head><body>Hi Ken, <br> <br> Thanks for the vtk related answer! The issue even appeared in local rendering without hw acceleration. The official paraview answer was to build against gallium, but since I am curious about using llvmpipe, I searched for up the gpu_shader4 issue. <br> <br> Do you have any idea on support of that in Mesa since it is not in the features.txt?<br> <br> Axel<br><br><div class="gmail_quote">On October 23, 2017 4:04:30 AM GMT+02:00, Ken Martin <ken.martin@kitware.com> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div dir="ltr">Really anything after Mesa 12 or so should be good as with llvmpipe or openswr I believe they all support at least OpenGL 3.2 which is what VTK/PV requires. We test VTK nightly against Mesa (master I think ?) to make sure it works. The gpu_shader4 is an old fallback for OpenGL 2.1 systems but Mesa 17 should be providing OpenGL 3.2. So something funny is going on. <div><br /></div><div>You might want to try the paraview mailing list as they are pretty familiar with getting PV to build/run with mesa on a variety of systems. Due to interactions with Qt5/VTK/Mesa sometimes there are some tricks to getting it to work.</div><div><br /></div><div>Also if you are doing remote rendering via GLX forwarding/Remote Desktop/etc often times that can have an impact.</div><div><br /></div><div>Thanks!</div><div>Ken</div><div><br /></div><div><br /></div><div><br /><div><br /></div></div></div><div class="gmail_extra"><br /><div class="gmail_quote">On Sun, Oct 22, 2017 at 3:47 PM, Axel Huebl <span dir="ltr"><<a href="mailto:a.huebl@hzdr.de" target="_blank">a.huebl@hzdr.de</a>></span> wrote:<br /><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br /> <br /> <br /> I was looking on <a href="http://mesamatrix.net" rel="noreferrer" target="_blank">mesamatrix.net</a> for the extension "GL_EXT_gpu_shader4"<br /> which is required by recent versions of VTK [1] for its OpenGL2 backend.<br /> <br /> Asking for it on GitHub, I was referred to this list since the web page<br /> is just a parsed list of<br /> <br /> <a href="https://cgit.freedesktop.org/mesa/mesa/tree/docs/features.txt" rel="noreferrer" target="_blank">https://cgit.freedesktop.org/<wbr />mesa/mesa/tree/docs/features.<wbr />txt</a><br /> <br /> The extension seems to be that one: [2]<br /> <br /> I was wondering if the status of "GL_EXT_gpu_shader4" can be added to<br /> the features.txt to get an idea which driver will run with recent<br /> versions of VTK?<br /> <br /> My background: I was trying to use mesa 17.1.5 with llvmpipe driver<br /> (based on llvm 3.8.1) and was surprised that VTK7 failed (in ParaView<br /> 5.4.1) to detect all required OpenGL 3.2 features.<br /> <br /> Another question: is this extension an early version or feature-wise a<br /> sub-set of "GL_ARB_gpu_shader5" in OpenGL 4.0? And as such, would it<br /> make sense to ask the VTK developers to rely on that instead, if available?<br /> <br /> <br /> Best regards,<br /> Axel<br /> <br /> [1]<br /> <a href="https://github.com/Kitware/VTK/blob/v7.1.1/Rendering/OpenGL2/vtkOpenGLRenderWindow.cxx#L632-L648" rel="noreferrer" target="_blank">https://github.com/Kitware/<wbr />VTK/blob/v7.1.1/Rendering/<wbr />OpenGL2/vtkOpenGLRenderWindow.<wbr />cxx#L632-L648</a><br /> <br /> [2]<br /> <a href="https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_gpu_shader4.txt" rel="noreferrer" target="_blank">https://www.khronos.org/<wbr />registry/OpenGL/extensions/<wbr />EXT/EXT_gpu_shader4.txt</a><br /> --<br /> <br /> Axel Huebl<br /> Phone <a href="tel:%2B49%20351%20260%203582" value="+493512603582">+49 351 260 3582</a><br /> <a href="https://www.hzdr.de/crp" rel="noreferrer" target="_blank">https://www.hzdr.de/crp</a><br /> Computational Radiation Physics<br /> Laser Particle Acceleration Division<br /> Helmholtz-Zentrum Dresden - Rossendorf e.V.<br /> <br /> Bautzner Landstrasse 400, 01328 Dresden<br /> POB 510119, D-01314 Dresden<br /> Vorstand: Prof. Dr.Dr.h.c. R. Sauerbrey<br /> Prof. Dr.Dr.h.c. P. Joehnk<br /> VR 1693 beim Amtsgericht Dresden<br /> ______________________________<wbr />_________________<br /> mesa-users mailing list<br /> <a href="mailto:mesa-users@lists.freedesktop.org">mesa-users@lists.freedesktop.<wbr />org</a><br /> <a href="https://lists.freedesktop.org/mailman/listinfo/mesa-users" rel="noreferrer" target="_blank">https://lists.freedesktop.org/<wbr />mailman/listinfo/mesa-users</a><br /> </blockquote></div><br /><br clear="all" /><div><br /></div>-- <br /><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Ken Martin PhD<div>Distinguished Engineer<br /><span style="font-size:12.8px">Kitware Inc.</span><br /></div><div>28 Corporate Drive<br />Clifton Park NY 12065<br /><div><br /></div><div><span style="font-size:10pt;font-family:Tahoma,sans-serif">This communication, including all attachments, contains confidential and legally privileged information, and it is intended only for the use of the addressee. 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