Platform does not define a GLUT font retrieval function - Fedora 41 Wayland

[Colin Gauvin]

I installed/built EMAN2 development version using conda and cmake, following the normal procedure. When I try to start any GUI program, I receive the error (below) basically saying getGLUTFontPointer cannot find a GLUT font retrieval function.

My laptop is running Fedora 41, using Wayland, and Nvidia 565.57.01.

I was able to workaround this problem by installing mesa-libOSMesa-devel and setting PYOPENGL_PLATFORM=osmesa in the command line.

I suspect I can set that variable either in my bashrc file, or directly in the conda env. But I wanted to report this here in case anyone else runs into it, so that they can fix it too.

Best,

Colin Gauvin

Structural Biologist

Superluminal Medicines

Details:

e2version.py output

EMAN 2.99.66 ( GITHUB: 2024-12-12 09:42 - commit: 643d2872c )
Your EMAN2 is running on: Linux-6.11.10-300.fc41.x86_64-x86_64-with-glibc2.40 6.11.10-300.fc41.x86_64
Your Python version is: 3.12.8

Exact command ran to produce failure:

e2display.py

Failure output:

Traceback (most recent call last):
 File "/home/colin/.micromamba/envs/eman2/bin/e2filtertool.py", line 44, in <m
odule>
   from eman2_gui.emimage2d import EMImage2DWidget
 File "/home/colin/.micromamba/envs/eman2/lib/python3.12/site-packages/eman2_g
ui/emimage2d.py", line 39, in <module>
   from OpenGL import GL,GLU,GLUT
 File "/home/colin/.micromamba/envs/eman2/lib/python3.12/site-packages/OpenGL/
GLUT/__init__.py", line 5, in <module>
   from OpenGL.GLUT.fonts import *
 File "/home/colin/.micromamba/envs/eman2/lib/python3.12/site-packages/OpenGL/
GLUT/fonts.py", line 20, in <module>
   p = platform.getGLUTFontPointer( name )
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "/home/colin/.micromamba/envs/eman2/lib/python3.12/site-packages/OpenGL/
platform/baseplatform.py", line 350, in getGLUTFontPointer
   raise NotImplementedError(  
   ^^^^^^^^^^^^^^^^^^^^^^^^^^
NotImplementedError: Platform does not define a GLUT font retrieval function

[rezaul karim]

thank you! I could not figure it out to solve the first GL_FRONT, GL_SHININESS and then GLUT font retrieval function issue with the latest installation. e2display was crashing. But this helped.

system: ubuntu 24.04 Nvidia RTX 3060Ti

I had to do > export PYOPENGL_PLATFORM=glxinfo
followed by rebuilding and installation. It is working great now.

[Steve Ludtke]

Sorry, not sure why you didn't get any response to your original message. Must have slipped between the cracks. My assumption would be that the problem is coming from using Wayland/XWayland, which deals with OpenGL in some strange ways. As far as I've seen, despite being around for well over a decade, Wayland still doesn't work as well as X for most things you'd actually want to do.   Anyway, I'm happy you found a workaround that works, and that you posted it here where others can also find it!

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