[WebGL2] Pass user-defined-properties-on-context.html layout test

• Component: WebGL
• Status: RESOLVED FIXED

[Kenneth Russell]

With the fix for Bug 214765, in which expando properties are being preserved correctly for objects latched into the WebGL context, the similar layout test:
webgl/2.0.0/conformance/context/user-defined-properties-on-context.html

is still failing.

In order to fix it, HTMLCanvasElements will have to keep the JavaScript wrapper for their context alive.

[Kenneth Russell]

Also check the following layout test:
webgl/2.0.0/resources/webgl_test_files/conformance/context/context-lost-restored.html

which looks for expando properties on extensions, and which theoretically should already be passing.

[Kenneth Russell]

Created attachment 406762 [details]
Patch

[Kenneth Russell]

ysuzuki@: could you please review this? I'm not sure this is completely correct. My first attempt put the HTMLCanvasElement::renderingContext() into the opaque root set, and that didn't work - JSHTMLCanvasElement::visitAdditionalChildren seemed to be called after the rendering context's isReachableFromOpaqueRoots.

[Kenneth Russell]

Created attachment 406763 [details]
Patch

[Darin Adler]

Comment on attachment 406763 [details]
Patch

I understand how we are taking advantage of the test that’s already present for WebGL 2. But for the project, it would be better if we had test coverage for all three context types.

[Yusuke Suzuki]

Comment on attachment 406763 [details]
Patch

r=me

[Kenneth Russell]

Thanks darin@ and ysuzuki@ for your reviews.

I'll add 2d and webgpu context expando tests. Note that HTMLCanvasElement.getContext("gpu") doesn't exist in the WebGPU spec any more, so I'll add a FIXME in that test about updating it once the implementation matches the spec.

[Kenneth Russell]

Created attachment 406805 [details]
Patch

[Kenneth Russell]

Comment on attachment 406805 [details]
Patch

Added new tests in the latest patch. CQ'ing.

[EWS]

Committed r265833: <https://trac.webkit.org/changeset/265833>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 406805 [details].

[Radar WebKit Bug Importer]

<rdar://problem/67352972>