Incorrectly generated PNG artifacts on MacOS

[ppebay]

Steps to reproduce

• on macOS 14.3, using Python 3.9.19 via conda and a build of VTK 9.3 from source;
• execute LBAF with the test-vt-tv.yaml configuration file in order to exercise vt-tv.

Observed error

Incorrect and missing edges in PNG artifact:

[lifflander]

Test this on a Mac machine @pierrepebay

[pierrepebay]

I have tested this on MacOS 13.5.2 with Python 3.9.19 and a build of VTK 9.3.0, here is the output:

[ppebay]

Putting this issue on the back burner until it arises again. Until then we can safely ignore it for now.

[ppebay]

Putting this issue on the back burner until it arises again. Until then we can safely ignore it for now.

Bringing this issue to the fore again, as it is confirmed as happening again with the same OS but with VTK-9.3.1 this time:

[ppebay]

@lifflander @tlamonthezie please let me know if you are able to reproduce this error on other macOS systems, thanks.

[ppebay]

Update with VTK v9.3.1:

Still with Mac OS Sonoma 14.3, the same incorrect artifacts (for the edge lines) persist, as described previously with 9.3.0:

[tlamonthezie]

Hello @ppebay to test your configuration a new branch has been created to run this conf in CI

• macOS 14
  CMAKE_C_COMPILER:FILEPATH=/Applications/Xcode_15.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
CMAKE_CXX_COMPILER:FILEPATH=/Applications/Xcode_15.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++

• VTK 9.3.1 build from source (no specific compilation flags except CMAKE_BUILD_TYPE:STRING=Release)

• VT-TV build from source (using build.sh script)

• execute VT-TV using the standalone app and using config/conf.yaml config file
  It appears that in that configuration the rendering is not as on your side
  Phase 7 rendering is:
  

The MACOS test environment is defined at https://github.com/DARMA-tasking/vt-tv/blob/70-incorrectly-generated-png-artifacts/.github/workflows/70-incorrectly-generated-png-artifacts.yml

[ppebay]

Hello @ppebay to test your configuration a new branch has been created to run this conf in CI

• macOS 14
  CMAKE_C_COMPILER:FILEPATH=/Applications/Xcode_15.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
CMAKE_CXX_COMPILER:FILEPATH=/Applications/Xcode_15.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
• VTK 9.3.1 build from source (no specific compilation flags except CMAKE_BUILD_TYPE:STRING=Release)
• VT-TV build from source (using build.sh script)
• execute VT-TV using the standalone app and using config/conf.yaml config file
  It appears that in that configuration the rendering is not as on your side
  Phase 7 rendering is:
  

The MACOS test environment is defined at https://github.com/DARMA-tasking/vt-tv/blob/70-incorrectly-generated-png-artifacts/.github/workflows/70-incorrectly-generated-png-artifacts.yml

Thank you @tlamonthezie for having tested on your side, and confirmed you don't have the issue. It's good that it's now in CI as well. I can't find the corresponding PR for this addition to the CI, is there one?

That said I would still like to be able to reproduce the problem I am seeing, but elsewhere. @maxime-bfsquall can you please confirm that you are getting the same (correct) results as @tlamonthezie above?

[tlamonthezie]

Hello @ppebay to test your configuration a new branch has been created to run this conf in CI

• macOS 14
  CMAKE_C_COMPILER:FILEPATH=/Applications/Xcode_15.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
CMAKE_CXX_COMPILER:FILEPATH=/Applications/Xcode_15.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
• VTK 9.3.1 build from source (no specific compilation flags except CMAKE_BUILD_TYPE:STRING=Release)
• VT-TV build from source (using build.sh script)
• execute VT-TV using the standalone app and using config/conf.yaml config file
  It appears that in that configuration the rendering is not as on your side
  Phase 7 rendering is:
  

The MACOS test environment is defined at https://github.com/DARMA-tasking/vt-tv/blob/70-incorrectly-generated-png-artifacts/.github/workflows/70-incorrectly-generated-png-artifacts.yml

Thank you @tlamonthezie for having tested on your side, and confirmed you don't have the issue. It's good that it's now in CI as well. I can't find the corresponding PR for this addition to the CI, is there one?

That said I would still like to be able to reproduce the problem I am seeing, but elsewhere. @maxime-bfsquall can you please confirm that you are getting the same (correct) results as @tlamonthezie above?

Hello @ppebay I think that it is not relevant to keep this test workflow in CI as there are now macos runners doing near the same in the unit tests workflows.
The macos runners (macos 12, 13 and 14) that run in CI are already rendering PNG artifacts

The main difference with the workflow created for the current issue is that the standalone app is run instead of the rendering tests to replay exactly the error scenario but it seems that it does not change anything at the end.