Bug 266825 – WebGL is available in webworker but not available in sub webworker

• Status: RESOLVED
• Resolution: FIXED
• Component: WebGL

[Tom]

Created attachment 469180 [details]
The first line is logged on a webworker directly, the second line is logged in same webworker by receiving postMessage from its sub worker indicate whether WebGL is supported

WebGL is available in webworker but not available in sub webworker

[Karl Dubost]

Hi Tom, 
Thanks for the report.

Are sure you it doesn't work.
Or are you reporting that you can't see its result in the Console?

Because this could be a duplicate of Bug 255402

[Karl Dubost]

It would be great if you could provide a reduce test case.

[Tom]

(In reply to Karl Dubost from comment #1)
> Hi Tom, 
> Thanks for the report.
> 
> Are sure you it doesn't work.
> Or are you reporting that you can't see its result in the Console?
> 
> Because this could be a duplicate of Bug 255402

Hi Karl

Yes, base on my testing, WebGL is not available in sub-worker, I notice the console issue for sub-worker as well, but the unavailability of WebGL in sub-worker is the bug I reported in this ticket

[Tom]

(In reply to Karl Dubost from comment #2)
> It would be great if you could provide a reduce test case.

Hi Karl

The test code could be like this, just start a new webworker with "worker.js" in a HTML page,  it will output "is sub-worker support WebGL: false" on Safari 17



worker.js

const worker = new Worker("./subworker.js");

worker.addEventListener("message", (e) => {
    console.log("is sub-worker support WebGL: ", e.data);
})


subworker.js

const ofs = new OffscreenCanvas(1, 1);


self.postMessage(ofs.getContext('webgl') ? true : false);

[Radar WebKit Bug Importer]

<rdar://problem/120279728>

[Kimmo Kinnunen]

Created attachment 469288 [details]
testcase

[Kimmo Kinnunen]

Created attachment 469289 [details]
testcase

[Kimmo Kinnunen]

Pull request: https://github.com/WebKit/WebKit/pull/22431

[Tom]

(In reply to Kimmo Kinnunen from comment #8)
> Pull request: https://github.com/WebKit/WebKit/pull/22431

Hi Kimmo

Happy new year and thank you for fixing it so quickly, do you know when will this fix released on Safari?

[EWS]

Committed 272765@main (9fb944e082ca): <https://commits.webkit.org/272765@main>

Reviewed commits have been landed. Closing PR #22431 and removing active labels.

[Tom]

I tested on  Safari Technology Preview 187 which said this issue has been fixed in release note, but it's still not working

[Kimmo Kinnunen]

Thanks for verifying. Which macOS version are you using?
WebGL on workers should work only on macOS 14 Sonoma.

[Kimmo Kinnunen]

Never mind, I see it not working on STP 187 on macOS 14

[Kimmo Kinnunen]

This should be now fixed and testable in Safari Technology Preview 188 for Sonoma.

[Kimmo Kinnunen]

https://developer.apple.com/safari/resources/

[Tom]

(In reply to Kimmo Kinnunen from comment #14)
> This should be now fixed and testable in Safari Technology Preview 188 for
> Sonoma.

I tested in 188, it's working, thank you