Adding mesalib does not make my vcs headless-compatible

[jypeter]

Following @danlipsa #393 (comment), I have added mesalib to my installation with conda install -n cdatm18_py2 -c conda-forge mesalib

 >conda list |grep -i mesa
mesalib                   18.3.1               h590aaf7_0    conda-forge

Unfortunately, this does not seem to solve my problem!

If DISPLAY is set , I still get OpenGL2 related errors when executing x.plot

34: ldistance = tcoordMC.x;
35: #endif
36: vec4 vertex = vec4(vertexMC.xy, 0.0, 1.0);
37: gl_Position = vertex*MCWCMatrix*WCDCMatrix; }


ERROR: In ../Rendering/OpenGL2/vtkShaderProgram.cxx, line 447
vtkShaderProgram (0x55a621f96130): 0:1(10): error: GLSL 1.50 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, and 3.00 ES

If DISPLAY is not set, vcs gives me the helpful message (Set your DISPLAY env variable or install mesalib conda package) I once requested in #211, eventhough mesalib is already installed!

 >echo $DISPLAY
localhost:39.0
(cdatm18_py2) jypeter@obelix4 - ...jypeter - 48 >unsetenv DISPLAY
(cdatm18_py2) jypeter@obelix4 - ...jypeter - 49 >echo $DISPLAY
DISPLAY: Undefined variable.
(cdatm18_py2) jypeter@obelix4 - ...jypeter - 50 >python
Python 2.7.15 | packaged by conda-forge | (default, Feb 28 2019, 04:00:11)
[GCC 7.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy as np, vcs
>>> id100 = np.identity(100)
>>> x = vcs.init()
>>> x.plot(id100)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/share/unix_files/cdat/miniconda3/envs/cdatm18_py2/lib/python2.7/site-packages/vcs-8.1-py3.7.egg/vcs/Canvas.py", line 2804, in plot

  File "/home/share/unix_files/cdat/miniconda3/envs/cdatm18_py2/lib/python2.7/site-packages/vcs-8.1-py3.7.egg/vcs/Canvas.py", line 4042, in __plot

  File "/home/share/unix_files/cdat/miniconda3/envs/cdatm18_py2/lib/python2.7/site-packages/vcs-8.1-py3.7.egg/vcs/VTKPlots.py", line 832, in plot
  File "/home/share/unix_files/cdat/miniconda3/envs/cdatm18_py2/lib/python2.7/site-packages/vcs-8.1-py3.7.egg/vcs/VTKPlots.py", line 639, in createRenWin
  File "/home/share/unix_files/cdat/miniconda3/envs/cdatm18_py2/lib/python2.7/site-packages/vcs-8.1-py3.7.egg/vcs/VTKPlots.py", line 749, in initialSize
RuntimeError: No DISPLAY set. Set your DISPLAY env variable or install mesalib conda package

I have tried to plot in a new canvas with bg=True, but I get the same result

>>> y = vcs.init(bg=True)
>>> y.plot(id100)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/share/unix_files/cdat/miniconda3/envs/cdatm18_py2/lib/python2.7/site-packages/vcs-8.1-py3.7.egg/vcs/Canvas.py", line 2804, in plot

  File "/home/share/unix_files/cdat/miniconda3/envs/cdatm18_py2/lib/python2.7/site-packages/vcs-8.1-py3.7.egg/vcs/Canvas.py", line 4042, in __plot

  File "/home/share/unix_files/cdat/miniconda3/envs/cdatm18_py2/lib/python2.7/site-packages/vcs-8.1-py3.7.egg/vcs/VTKPlots.py", line 832, in plot
  File "/home/share/unix_files/cdat/miniconda3/envs/cdatm18_py2/lib/python2.7/site-packages/vcs-8.1-py3.7.egg/vcs/VTKPlots.py", line 639, in createRenWin
  File "/home/share/unix_files/cdat/miniconda3/envs/cdatm18_py2/lib/python2.7/site-packages/vcs-8.1-py3.7.egg/vcs/VTKPlots.py", line 749, in initialSize
RuntimeError: No DISPLAY set. Set your DISPLAY env variable or install mesalib conda package
>>>

[jypeter]

Just to be sure, I have also added mesalib to the remote server I mentioned in #393 (comment), and I get the same kind of errors

[much more of the same above]
32: #endif
33: #ifdef haveLines
34: ldistance = tcoordMC.x;
35: #endif
36: vec4 vertex = vec4(vertexMC.xy, 0.0, 1.0);
37: gl_Position = vertex*MCWCMatrix*WCDCMatrix; }


ERROR: In ../Rendering/OpenGL2/vtkShaderProgram.cxx, line 447
vtkShaderProgram (0x55ec673f9de0): 0:1(10): error: GLSL 1.50 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, and 3.00 ES


<vcs.displayplot.Dp object at 0x7ff29c445dd0>

mesalib is installed!

(cdatm18_py2) [jypmce@ciclad-ng bin]$ conda list | grep -i mesa
mesalib                   18.3.1               h590aaf7_0    conda-forge

[doutriaux1]

@jypeter please send em the output of:
conda list vtk

Thx

[jypeter]

On both servers, I get

$ conda list vtk
# packages in environment at /home/share/unix_files/cdat/miniconda3/envs/cdatm18_py2:
#
# Name                    Version                   Build  Channel
vtk-cdat                  8.2.0rc2.8.1     py27h413fb2d_0    cdat/label/v81

I have not tried the headless test in the python 3 version, but I get

 >conda list -n cdatm18_py3 vtk
# packages in environment at /home/share/unix_files/cdat/miniconda3/envs/cdatm18_py3:
#
# Name                    Version                   Build  Channel
vtk-cdat                  8.2.0rc2.8.1     py36h413fb2d_0    cdat/label/v81

[doutriaux1]

yes conda did not bring vtk-cdat to use mesalib
try:

conda install -f -c cdat/label/v81 -c conda-forge mesalib vtk-cdat

[jypeter]

OK, I have used your install command

 >conda install -f -c cdat/label/v81 -c conda-forge mesalib vtk-cdat

WARNING: The --force flag will be removed in a future conda release.
         See 'conda install --help' for details about the --force-reinstall
         and --clobber flags.

Collecting package metadata: done
Solving environment: done

## Package Plan ##

  environment location: /home/share/unix_files/cdat/miniconda3/envs/cdatm18_py2

  added / updated specs:
    - mesalib
    - vtk-cdat

The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    vtk-cdat-8.2.0rc2.8.1      |py27_mesalibh24c825c_0        41.5 MB  cdat/label/v81
    ------------------------------------------------------------
                                           Total:        41.5 MB

The following packages will be DOWNGRADED:

  vtk-cdat                      8.2.0rc2.8.1-py27h413fb2d_0 --> 8.2.0rc2.8.1-py27_mesalibh24c825c_0

Proceed ([y]/n)? y

Downloading and Extracting Packages
vtk-cdat-8.2.0rc2.8. | 41.5 MB   | ##################################### | 100%
Preparing transaction: done
Verifying transaction: done
Executing transaction: done

And now it works indeed! I have even cleared the canvas and plotted something else

jypeter@obelix5 - ...jypeter - 46 >python
Python 2.7.15 | packaged by conda-forge | (default, Feb 28 2019, 04:00:11)
[GCC 7.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy as np, vcs
>>> id100 = np.identity(100)
>>> x = vcs.init()
>>> x.plot(id100)
<vcs.displayplot.Dp object at 0x2aff4a9fccf8>
>>> x.png('test_mesalib')
>>> x.pdf('test_mesalib')
>>> x.clear()
>>> x.plot(id100[:5, :5])
<vcs.displayplot.Dp object at 0x2aff4a9fcdd0>
>>> x.pdf('test_mesalib_b')
>>> x.png('test_mesalib_b')
>>>

Works also fine when DISPLAY is not set

I see that I was using the out-of-date steps of https://github.com/CDAT/cdat/wiki/install. The page is OK now (I have refreshed it), but the page already opened in my browser was unfortunately out-of-date

[doutriaux1]

@jypeter thans. Indeed the msalib version does NOT need a DISPALY. Glad it helps you moving forward.

[jypeter]

I guess I can close this one