2045840 - WebGPU: toDataURL doesn't work on a canvas that's never been rendered to

Status: RESOLVED FIXED

(Core :: Graphics: WebGPU, defect, P1)

Description

[Gregg Tavares]

Attachment: WebGPU_ Capture-during-rendering.html

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36

Steps to reproduce:

run the attached repo

Actual results:

The first capture, when nothing has ever been rendered to a canvas, fails to produce an image

Expected results:

It should have made 300x150 solid black image (unclear if it should be transparent black or opaque black. Need to read the specs).

Comment 1

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

The Bugbug bot thinks this bug should belong to the 'Core::Graphics: Canvas2D' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 3

[Andy Leiserson [:aleiserson]]

Attachment: Bug 2045840 - Support readback from a WebGPU canvas before it is used r=#webgpu-reviewers!,sotaro

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/aaa996745512
https://hg.mozilla.org/integration/autoland/rev/bc7ee878a290
Support readback from a WebGPU canvas before it is used r=webgpu-reviewers,ErichDonGubler

Comment 5

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/bc7ee878a290