1878316 - WebGPU demo (https://react-webgpu-samples.vercel.app/) flashed the background (and rapid memory increase) when fiddling with the parameters and

Status: RESOLVED FIXED

(Core :: Graphics: WebGPU, defect)

Description

[Mayank Bansal]

Go to https://react-webgpu-samples.vercel.app/
Rapidly fiddle the first slider

AR:

1. The black background flashes
2. If you continue to rapidly fiddle with the slider, the memory will increase very rapidly.

ER: Not so

Comment 1

[Mayank Bansal]

Attachment: about:support

Comment 2

[Sotaro Ikeda [:sotaro]]

I did not see the problem with pref dom.webgpu.swap-chain.external-texture-dx12 = true on Windows. From it, remote texture seemed unregistered during readback.

Comment 3

[Lee Salzman [:lsalzman]]

The problem happens when using a raw buffer, and the swap chain is destroyed before the Readback callback is completed. In this case the present is aborted causing the flash. The webgpu canvas code needs to delay destruction till all readbacks are completed.

Comment 4

[Sotaro Ikeda [:sotaro]]

Attachment: Bug 1878316 - Defer SwapChain drop until readback complete

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/86120bd613f9
Defer SwapChain drop until readback complete r=lsalzman

Comment 6

[Natalia Csoregi [:nataliaCs]]

https://hg.mozilla.org/mozilla-central/rev/86120bd613f9