It would be nice to be able to reacquire lost webgl contexts

[Yomguithereal]

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[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[jacomyal]

@Yomguithereal could you remind me what you meant by that please?

[Yomguithereal]

Let's say you spawn a lot of webgl contexts, even unrelated to sigma and in other tabs. At one point, your sigma contexts will be lost to be given to newer canvases elsewhere. This means that if you open, say, a gephi lite tab, you go do your thing on other tabs that may use webgl, and you come back to your gephi lite tab, the webgl context is lost and either nothing is drawn on screen, or the last buffer is still shown but nothing more can happen, or your canvas is black or glitches (depends on the GPU and the computer basically).

I think there is a way to "re-acquire" a webgl context when this is detected to happen, so we can smoothly do something for the user.

This also happens in ipysigma when the user spawn mutliple contexts and come back to a widget on top of the window for instance.

[boogheta]

Simple way to do that is to instance a few sigmas in the same web page
I know my browser usually starts removing the first one after instantiating a 5th or 6th one

[Yomguithereal]

Another note on that: While this should be a nice feature to re-acquire lost contexts when switching tabs and all, we must avoid a re-acquiring endless loop. For instance, if you have 5 sigmas on the same page and adding a sixth cause the first one to be lost, then re-acquired, which means the second one is lost etc. etc. you get the gist of it.