Qtweb issues

linev · October 5, 2024, 11:55am

Hi,

For some reasons WebGL is not working in your QWebEngine. This make impossible to use 3D graphics. Searching in internet, I found possible workaround here:

github.com/WorldWideTelescope/pywwt

WebGL blacklisted in some Qt versions

opened 03:58PM - 21 Jul 21 UTC

astrofrog

If I use PyWWT with PyQt5 5.14 and PyQtWebEngine 5.14, the following example: … ```python from pywwt.qt import WWTQtClient wwt = WWTQtClient(block_until_ready=True) wwt.wait() ``` raises the following warnings/errors: ``` [11741:48899:0721/165650.545296:ERROR:context_group.cc(151)] ContextResult::kFatalFailure: WebGL2 blacklisted This browser does not support WebGL 2.0. Some features will work suboptimally. To get the full AAS WWT experience, consider using the latest version of Chrome, Firefox or Edge. In case you would like to use Safari, we recommend that you enable WebGL 2.0 (level=1, line_number=35419, source_id=https://web.wwtassets.org/engine/7/wwtsdk.js) [11741:48899:0721/165650.549528:ERROR:context_group.cc(143)] ContextResult::kFatalFailure: WebGL1 blacklisted [11741:48899:0721/165650.550852:ERROR:context_group.cc(143)] ContextResult::kFatalFailure: WebGL1 blacklisted ``` It would be good to figure out why this is happening and what users can do to fix this (maybe even mention this in the PyWWT Qt docs section)

Can you try to export following shell variable before starting qtweb application:

export QTWEBENGINE_CHROMIUM_FLAGS=--ignore-gpu-blacklist

And if you are not interested in 3D graphics (like geometry viewer or lego plots),
one can provide qtweb application without these elements shown by default.