OpenGl no Context problem in ewoks3dxrd (that uses orange3)

[abmajith]

------------------------------- Error Exception -------------------------------
Traceback (most recent call last):
File "/home/noordhee/BMLine_Projects/ewoksImageD11/ewoks3dxrd/venv/lib/python3.12/site-packages/silx/gui/_glutils/OpenGLWidget.py", line 237, in paintGL
parent.paintGL()
File "/home/noordhee/BMLine_Projects/ewoksImageD11/ewoks3dxrd/venv/lib/python3.12/site-packages/silx/gui/plot/backends/BackendOpenGL.py", line 466, in paintGL
self._paintFBOGL()
File "/home/noordhee/BMLine_Projects/ewoksImageD11/ewoks3dxrd/venv/lib/python3.12/site-packages/silx/gui/plot/backends/BackendOpenGL.py", line 399, in _paintFBOGL
self._plotFrame.render()
File "/home/noordhee/BMLine_Projects/ewoksImageD11/ewoks3dxrd/venv/lib/python3.12/site-packages/silx/gui/plot/backends/glutils/GLPlotFrame.py", line 784, in render
label.render(matProj, self.dotsPerInch)
File "/home/noordhee/BMLine_Projects/ewoksImageD11/ewoks3dxrd/venv/lib/python3.12/site-packages/silx/gui/plot/backends/glutils/GLText.py", line 278, in render
gl.glVertexAttribPointer(posAttrib, 2, gl.GL_FLOAT, gl.GL_FALSE, 0, vertices)
File "/home/noordhee/BMLine_Projects/ewoksImageD11/ewoks3dxrd/venv/lib/python3.12/site-packages/OpenGL/latebind.py", line 63, in call
return self.wrapperFunction( self.baseFunction, *args, **named )
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/noordhee/BMLine_Projects/ewoksImageD11/ewoks3dxrd/venv/lib/python3.12/site-packages/OpenGL/GL/VERSION/GL_2_0.py", line 515, in glVertexAttribPointer
contextdata.setValue(key, array)
File "/home/noordhee/BMLine_Projects/ewoksImageD11/ewoks3dxrd/venv/lib/python3.12/site-packages/OpenGL/contextdata.py", line 58, in setValue
context = getContext( context )
^^^^^^^^^^^^^^^^^^^^^
File "/home/noordhee/BMLine_Projects/ewoksImageD11/ewoks3dxrd/venv/lib/python3.12/site-packages/OpenGL/contextdata.py", line 40, in getContext
raise error.Error(
OpenGL.error.Error: Attempt to retrieve context when no valid context

our environment (python)
annotated-types==0.7.0
anyio==4.11.0
AnyQt==0.2.1
asttokens==3.0.0
attrs==25.4.0
baycomp==1.0.3
Bottleneck==1.6.0
bslz4-to-sparse==0.0.15
cattrs==25.3.0
certifi==2025.10.5
cffi==2.0.0
chardet==5.2.0
charset-normalizer==3.4.4
click==8.3.0
cloudpickle==3.1.1
comm==0.2.3
commonmark==0.9.1
contourpy==1.3.3
cryptography==46.0.3
cycler==0.12.1
dask==2025.10.0
debugpy==1.8.17
decorator==5.2.1
dictdiffer==0.9.0
diffpy.structure==3.3.1
docutils==0.22.2
et_xmlfile==2.0.0
ewoks==2.0.1
-e git+ssh://git@gitlab.esrf.fr/workflow/ewoksapps/ewoks3dxrd.git@ac1239bf8854900fda8764b07b65c0f9d08524ec#egg=ewoks3dxrd
ewokscore==2.0.0
ewoksorange==2.0.1
ewoksutils==1.5.1
executing==2.2.1
fabio==2024.9.0
fast-histogram==0.14
fonttools==4.60.1
fsspec==2025.9.0
h11==0.16.0
h5py==3.15.1
hdf5plugin==6.0.0
httpcore==1.0.9
httpx==0.28.1
idna==3.11
ImageD11==2.1.2
imageio==2.37.0
iniconfig==2.3.0
ipykernel==7.0.1
ipython==9.6.0
ipython_pygments_lexers==1.1.1
jaraco.classes==3.4.0
jaraco.context==6.0.1
jaraco.functools==4.3.0
jedi==0.19.2
jeepney==0.9.0
joblib==1.5.2
jupyter_client==8.6.3
jupyter_core==5.9.1
keyring==25.6.0
keyrings.alt==5.0.2
kiwisolver==1.4.9
lazy_loader==0.4
llvmlite==0.45.1
locket==1.0.0
lxml==6.0.2
matplotlib==3.10.7
matplotlib-inline==0.2.1
matplotlib-scalebar==0.9.0
more-itertools==10.8.0
nest-asyncio==1.6.0
networkx==3.5
numba==0.62.1
numexpr==2.14.1
numpy==2.3.4
openpyxl==3.1.5
openTSNE==1.0.2
orange-canvas-core==0.2.6
orange-widget-base==4.26.0
Orange3==3.39.0
orix==0.13.3
packaging==25.0
pandas==2.3.3
parso==0.8.5
partd==1.4.2
pexpect==4.9.0
pillow==12.0.0
platformdirs==4.5.0
pluggy==1.6.0
ply==3.11
pooch==1.8.2
prettytable==3.16.0
prompt_toolkit==3.0.52
psutil==7.1.1
ptyprocess==0.7.0
pure_eval==0.2.3
PyCifRW==5.0.1
pycparser==2.23
pydantic==2.12.3
pydantic_core==2.41.4
pyFAI==2025.3.0
Pygments==2.19.2
PyOpenGL==3.1.10
pyopengltk==0.0.4
pyparsing==3.2.5
PyQt5==5.15.11
PyQt5-Qt5==5.15.17
PyQt5_sip==12.17.1
PyQt6==6.9.1
PyQt6-Qt6==6.9.2
PyQt6_sip==13.10.2
pyqtgraph==0.13.7
pytest==8.4.2
python-dateutil==2.9.0.post0
python-louvain==0.16
pytz==2025.2
PyYAML==6.0.3
pyzmq==27.1.0
qasync==0.28.0
QtAwesome==1.4.0
qtconsole==5.7.0
QtPy==2.4.3
requests==2.32.5
requests-cache==1.2.1
scikit-image==0.25.2
scikit-learn==1.7.2
scipy==1.16.2
SecretStorage==3.4.0
serverfiles==0.3.1
setuptools==80.9.0
silx==2.2.2
six==1.17.0
sniffio==1.3.1
stack-data==0.6.3
tabulate==0.9.0
threadpoolctl==3.6.0
tifffile==2025.10.16
toolz==1.1.0
tornado==6.5.2
tqdm==4.67.1
traitlets==5.14.3
truststore==0.10.4
typing-inspection==0.4.2
typing_extensions==4.15.0
tzdata==2025.2
url-normalize==2.2.1
urllib3==2.5.0
wcwidth==0.2.14
xfab==0.0.6
xgboost==2.0.3
xlrd==2.0.2
xlsxwriter==3.2.9

[t20100]

What does glxinfo provides?

What happens if you set QT_API=PyQt6 environment variable?

Can you try to reproduce with a simple script using only a silx widget instead of the whole application?

Can you provide information on how you run it? directly on the machine, through ssh -X or a remote desktop?
and on which OS?

[abmajith]

I will try to reproduce this one with simple script,

this one happened in my Ubuntu 24.04 office laptop, I used without QT_API=PyQT6

[payno]

Related to https://gitlab.esrf.fr/workflow/ewoksapps/ewoks3dxrd/-/issues/108.
The issue seems to appear when calling openGL Text2D implementation specifically. Execution is done on the main Qt thread. And specifically when

        texAttrib = prog.attributes["texCoords"]
        gl.glEnableVertexAttribArray(texAttrib)
        gl.glVertexAttribPointer(texAttrib, 2, gl.GL_FLOAT, gl.GL_FALSE, 0, texCoords)

is called. But provided values seems fair from what we saw...

[t20100]

Yes, the context in pyopengl looks to disappear during the rendering process....

[abmajith]

HI @t20100,

I have one question, are we using contextdata any where other than rendering labels, stuff?

[t20100]

Yes, contextdata is called at least for each glVertexAttribPointer call when glEnableVertexAttribArray is enabled.