1642216 - gfx.offscreencanvas.enabled does not enable transferControlToOffscreen()

Status: RESOLVED DUPLICATE of bug 1736177

(Core :: Graphics: Canvas2D, defect, P3)

Description

[Barry Simpson]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36

Steps to reproduce:

1. In about:config, enable gfx.offscreencanvas.enabled.
2. Restart browser even though I'm not sure it's required.
3. Open JS Console.
4. Type document.createElement('canvas').transferControlToOffscreen()

Actual results:

[Exception... "Method not implemented" nsresult: "0x80004001 (NS_ERROR_NOT_IMPLEMENTED)" location: "JS frame :: debugger eval code :: <TOP_LEVEL> :: line 1" data: no]

Expected results:

Should have evaluated to an OffscreenCanvas object.

Comment 1

[Barry Simpson]

Actual Firefox useragent is "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:77.0) Gecko/20100101 Firefox/77.0"

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:jlast, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 4

[Nicolas Chevobbe [:nchevobbe]]

Not sure what's happening/expected, the DOM team will know better than I do

Comment 5

[Andrew Osmond [:aosmond] (he/him)]

This will be fixed by bug 1736177.