Re: Using PyopenGL with GLArea
Matti Kariluoma <[email protected]> Wed, 8 Mar 2017 09:25:16 -0600
| Newsgroups | gmane.comp.python.opengl.user |
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This is a multi-part message in MIME format. --===============8160335153540464594== Content-Type: multipart/alternative; boundary="------------768596CD83ACF5FFAFF0DEC1" This is a multi-part message in MIME format. --------------768596CD83ACF5FFAFF0DEC1 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit I will take a look on Saturday. 1) In the meantime, could you create a minimal example that demonstrates the problem? Its always very interesting to see simple-looking code that works on some platforms but doesn't work on others; we just had an example of such two weeks ago from another user. Ideally your minimal example would not involve the use of the `gi' module, or at the very least, include instructions to bring a fresh installation up with that package installed, i.e. "sudo apt-get install ..." 2) Does your problem require `gi' for this error to show? 3) Is the error reproducible under GLUT or GLFW? 4) If (2), what steps are needed to install `gi', and what version of `gi'? On 3/5/17 12:49 PM, Oly wrote: > Just another thing of note, > > using PYOPENGL_PLATFORM = "osmesa" with x11 causes the same issue, so > it would appear related to the mesa drivers. > > What other options can that take, can i enforce nvidia or intel > instead of osmesa ? > > perhaps wayland is defaulting to mesa and x11 is using something else. > > feels like i am getting nearer to a solution, or at least a work around. > > > > On Sun, 5 Mar 2017 at 17:29 Oly <[email protected] > <mailto:[email protected]>> wrote: > > Also because it maybe useful, i have this being reported by gtk / > opengl. > > Intel_Open_Source_Technology_Center_4.5_(Core_Profile)_Mesa_17.0.0_-_padoka_PPA_Mesa_DRI_Intel(R)_Kabylake_GT2__4.50 > OpenGL Version 4.5_(Core_Profile)_Mesa_17.0.0_-_padoka_PPA > OpenGL Renderer Mesa_DRI_Intel(R)_Kabylake_GT2_ > Shader Language version 4.50 > > so it looks like things should be new enough to support that > feature under wayland. > > > On Sun, 5 Mar 2017 at 17:28 Oly <[email protected] > <mailto:[email protected]>> wrote: > > Thanks for the offer not sure how i missed your reply. > > Anyway i made some progress, yes my issue is with linux and > gtk specifically I have also found out it has something todo > with wayland. > > Running the example i can get it to work with my intel and > nvidia graphics (optimus card) on x11 but if i am using > wayland then i get the error above. > > Not sure why wayland would effect what available to me anyone > seen anything similar ? > > Seems it i graphics card related. > > I did not know about this trick PYOPENGL_PLATFORM="osmesa" so > thats useful to know but it does not help unfortunately. > > > On Sun, 12 Feb 2017 at 20:20 Matti Kariluoma > <[email protected] <mailto:[email protected]>> > wrote: > > I tried to have a look at your code, but I don't have the > `gi' package > on my machine, and `pip install gi' can't find it either. > > 1) Would you accept help in the form of a program that > starts with > `from OpenGL import GLUT' , or does your problem require gi? > > As for the error you posted, looking at > https://mesamatrix.net/ I see > that glGenVertexArrays is a part of OpenGL 3.0, extension > GL_ARB_vertex_array_object which seems to have broad support. > > 2) Maybe your graphics device (or its driver) is ancient? > > Since your gist seems to indicate you are using GTK, I > assume you are > running this under Linux. You may want to look into > running PyOpenGL > under mesa, using one of their software renderers if for > whatever > reason you don't have OpenGL3.0 support. > > Using the mesa CPU renderer under Linux: > http://www.mattikariluoma.com/blog/Headless%20Rendered%20OpenGL%20Scenes.html > > >From: Oliver Marks <oly@di...> - 2017-02-11 22:40:09 > > > >Thought i would have a stab at trying to make this work, > I cant find any > >existing working examples. > > > >I have linked a gist if any one want to try. > > > >currently I am getting this error. > > > >OpenGL.error.NullFunctionError: Attempt to call an > undefined function > >glGenVertexArrays, check for bool(glGenVertexArrays) > before calling > > > >Which to me sounds like its not available to the context, > GLArea is > >supplying the context so i am unsure why this would be ? > > > >Any ideas or can anyone give me some pointers ? > > > >https://gist.github.com/olymk2/5b3e49ac83130e580bd9983f2e5d49c3 > > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's > most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > PyOpenGL Homepage > http://pyopengl.sourceforge.net > _______________________________________________ > PyOpenGL-Users mailing list > [email protected] > <mailto:[email protected]> > https://lists.sourceforge.net/lists/listinfo/pyopengl-users > --------------768596CD83ACF5FFAFF0DEC1 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit <html> <head> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <p>I will take a look on Saturday.</p> <p>1) In the meantime, could you create a minimal example that demonstrates the problem? <br> </p> <p>Its always very interesting to see simple-looking code that works on some platforms but doesn't work on others; we just had an example of such two weeks ago from another user.<br> </p> <p>Ideally your minimal example would not involve the use of the `gi' module, or at the very least, include instructions to bring a fresh installation up with that package installed, i.e. "sudo apt-get install ..." <br> </p> <p>2) Does your problem require `gi' for this error to show? <br> </p> <p>3) Is the error reproducible under GLUT or GLFW?<br> </p> <p>4) If (2), what steps are needed to install `gi', and what version of `gi'?<br> </p> <div class="moz-cite-prefix">On 3/5/17 12:49 PM, Oly wrote:<br> </div> <blockquote cite="mid:CAPZowhzxv2iTWoDVJPppF21=D-s5pNMwy2nszGgKZvdWM=4Cbg@mail.gmail.com" type="cite"> <div dir="ltr">Just another thing of note,<br> <br> using PYOPENGL_PLATFORM = "osmesa" with x11 causes the same issue, so it would appear related to the mesa drivers.<br> <br> What other options can that take, can i enforce nvidia or intel instead of osmesa ? <br> <br> perhaps wayland is defaulting to mesa and x11 is using something else.<br> <br> feels like i am getting nearer to a solution, or at least a work around.<br> <br> <br> <pre> </pre> </div> <br> <div class="gmail_quote"> <div dir="ltr">On Sun, 5 Mar 2017 at 17:29 Oly <<a moz-do-not-send="true" href="mailto:[email protected]">[email protected]</a>> wrote:<br> </div> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div dir="ltr" class="gmail_msg"> <div class="gmail_msg">Also because it maybe useful, i have this being reported by gtk / opengl.<br class="gmail_msg"> <br class="gmail_msg"> Intel_Open_Source_Technology_Center_4.5_(Core_Profile)_Mesa_17.0.0_-_padoka_PPA_Mesa_DRI_Intel(R)_Kabylake_GT2__4.50<br class="gmail_msg"> OpenGL Version 4.5_(Core_Profile)_Mesa_17.0.0_-_padoka_PPA<br class="gmail_msg"> OpenGL Renderer Mesa_DRI_Intel(R)_Kabylake_GT2_<br class="gmail_msg"> Shader Language version 4.50<br class="gmail_msg"> <br class="gmail_msg"> </div> so it looks like things should be new enough to support that feature under wayland.<br class="gmail_msg"> <div class="gmail_msg"><br class="gmail_msg"> </div> </div> <br class="gmail_msg"> <div class="gmail_quote gmail_msg"> <div dir="ltr" class="gmail_msg">On Sun, 5 Mar 2017 at 17:28 Oly <<a moz-do-not-send="true" href="mailto:[email protected]" class="gmail_msg" target="_blank">[email protected]</a>> wrote:<br class="gmail_msg"> </div> <blockquote class="gmail_quote gmail_msg" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div dir="ltr" class="gmail_msg"> <div class="gmail_msg"> <div class="gmail_msg"> <div class="gmail_msg"> <div class="gmail_msg"> <div class="gmail_msg">Thanks for the offer not sure how i missed your reply.<br class="gmail_msg"> <br class="gmail_msg"> </div> Anyway i made some progress, yes my issue is with linux and gtk specifically I have also found out it has something todo with wayland.<br class="gmail_msg"> <br class="gmail_msg"> </div> Running the example i can get it to work with my intel and nvidia graphics (optimus card) on x11 but if i am using wayland then i get the error above.<br class="gmail_msg"> <br class="gmail_msg"> </div> Not sure why wayland would effect what available to me anyone seen anything similar ?<br class="gmail_msg"> <br class="gmail_msg"> </div> Seems it i graphics card related.<br class="gmail_msg"> <br class="gmail_msg"> </div> I did not know about this trick PYOPENGL_PLATFORM="osmesa" so thats useful to know but it does not help unfortunately.<br class="gmail_msg"> <div class="gmail_msg"> <div class="gmail_msg"> <div class="gmail_msg"> <div class="gmail_msg"><br class="gmail_msg"> </div> </div> </div> </div> </div> <br class="gmail_msg"> <div class="gmail_quote gmail_msg"> <div dir="ltr" class="gmail_msg">On Sun, 12 Feb 2017 at 20:20 Matti Kariluoma <<a moz-do-not-send="true" href="mailto:[email protected]" class="gmail_msg" target="_blank">[email protected]</a>> wrote:<br class="gmail_msg"> </div> <blockquote class="gmail_quote gmail_msg" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I tried to have a look at your code, but I don't have the `gi' package<br class="gmail_msg"> on my machine, and `pip install gi' can't find it either.<br class="gmail_msg"> <br class="gmail_msg"> 1) Would you accept help in the form of a program that starts with<br class="gmail_msg"> `from OpenGL import GLUT' , or does your problem require gi?<br class="gmail_msg"> <br class="gmail_msg"> As for the error you posted, looking at <a moz-do-not-send="true" href="https://mesamatrix.net/" rel="noreferrer" class="gmail_msg" target="_blank">https://mesamatrix.net/</a> I see<br class="gmail_msg"> that glGenVertexArrays is a part of OpenGL 3.0, extension<br class="gmail_msg"> GL_ARB_vertex_array_object which seems to have broad support.<br class="gmail_msg"> <br class="gmail_msg"> 2) Maybe your graphics device (or its driver) is ancient?<br class="gmail_msg"> <br class="gmail_msg"> Since your gist seems to indicate you are using GTK, I assume you are<br class="gmail_msg"> running this under Linux. You may want to look into running PyOpenGL<br class="gmail_msg"> under mesa, using one of their software renderers if for whatever<br class="gmail_msg"> reason you don't have OpenGL3.0 support.<br class="gmail_msg"> <br class="gmail_msg"> Using the mesa CPU renderer under Linux:<br class="gmail_msg"> <a moz-do-not-send="true" href="http://www.mattikariluoma.com/blog/Headless%20Rendered%20OpenGL%20Scenes.html" rel="noreferrer" class="gmail_msg" target="_blank">http://www.mattikariluoma.com/blog/Headless%20Rendered%20OpenGL%20Scenes.html</a><br class="gmail_msg"> <br class="gmail_msg"> >From: Oliver Marks <a class="moz-txt-link-rfc2396E" href="mailto:oly@di..."><oly@di...></a> - 2017-02-11 22:40:09<br class="gmail_msg"> ><br class="gmail_msg"> >Thought i would have a stab at trying to make this work, I cant find any<br class="gmail_msg"> >existing working examples.<br class="gmail_msg"> ><br class="gmail_msg"> >I have linked a gist if any one want to try.<br class="gmail_msg"> ><br class="gmail_msg"> >currently I am getting this error.<br class="gmail_msg"> ><br class="gmail_msg"> >OpenGL.error.NullFunctionError: Attempt to call an undefined function<br class="gmail_msg"> >glGenVertexArrays, check for bool(glGenVertexArrays) before calling<br class="gmail_msg"> ><br class="gmail_msg"> >Which to me sounds like its not available to the context, GLArea is<br class="gmail_msg"> >supplying the context so i am unsure why this would be ?<br class="gmail_msg"> ><br class="gmail_msg"> >Any ideas or can anyone give me some pointers ?<br class="gmail_msg"> ><br class="gmail_msg"> ><a moz-do-not-send="true" href="https://gist.github.com/olymk2/5b3e49ac83130e580bd9983f2e5d49c3" rel="noreferrer" class="gmail_msg" target="_blank">https://gist.github.com/olymk2/5b3e49ac83130e580bd9983f2e5d49c3</a><br class="gmail_msg"> ><br class="gmail_msg"> <br class="gmail_msg"> ------------------------------------------------------------------------------<br class="gmail_msg"> Check out the vibrant tech community on one of the world's most<br class="gmail_msg"> engaging tech sites, SlashDot.org! <a moz-do-not-send="true" href="http://sdm.link/slashdot" rel="noreferrer" class="gmail_msg" target="_blank">http://sdm.link/slashdot</a><br class="gmail_msg"> _______________________________________________<br class="gmail_msg"> PyOpenGL Homepage<br class="gmail_msg"> <a moz-do-not-send="true" href="http://pyopengl.sourceforge.net" rel="noreferrer" class="gmail_msg" target="_blank">http://pyopengl.sourceforge.net</a><br class="gmail_msg"> _______________________________________________<br class="gmail_msg"> PyOpenGL-Users mailing list<br class="gmail_msg"> <a moz-do-not-send="true" href="mailto:[email protected]" class="gmail_msg" target="_blank">[email protected]</a><br class="gmail_msg"> <a moz-do-not-send="true" href="https://lists.sourceforge.net/lists/listinfo/pyopengl-users" rel="noreferrer" class="gmail_msg" target="_blank">https://lists.sourceforge.net/lists/listinfo/pyopengl-users</a><br class="gmail_msg"> </blockquote> </div> </blockquote> </div> </blockquote> </div> </blockquote> <br> </body> </html> --------------768596CD83ACF5FFAFF0DEC1-- --===============8160335153540464594== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline ------------------------------------------------------------------------------ Announcing the Oxford Dictionaries API! 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