1834395 - (webgpu-rgba16float) WebGPU: Support `rgba16float` texture format in `GPUCanvasConfiguration`s

Status: NEW

(Core :: Graphics: WebGPU, task, P3)

Description

[Erich Gubler [:ErichDonGubler] (he/him)]

rgba16float is a “supported context format” per section 21.4 of the current WebGPU v1 spec. draft (GPUCanvasConfiguration). We currently don't support it, and we need to!

Comment 1

[Erich Gubler [:ErichDonGubler] (he/him)]

We have failures in CTS right now where specifying GPUCanvasConfiguration.format = "rgba16float" to GPUCanvasContext.configureCanvas causes CanvasContext.cpp:CanvasContext::Configure in C++ to run into this lack of support. I don't see an immediate match for the layout of data in rgba16float in gfx::SurfaceFormat's variants, but that's what we'll need in order to fully support this.

Comment 2

[Erich Gubler [:ErichDonGubler] (he/him)]

:jgilbert has indicated that she's already got patches in the works to fix this. Assigning to her.

Comment 4

[Andy Leiserson [:aleiserson]]

As noted in bug 1967329, the error here will now be TypeError: GPUCanvasContext.configure: Canvas texture format 'rgba16float' is not yet supported. Subscribe to <https://bugzilla.mozilla.org/show_bug.cgi?id=1967329> for updates on its development in Firefox.

I am also going to reference this bug from the (commented out) toneMapping and colorSpace members of GPUCanvasConfiguration.

Comment 5

[Jim Blandy :jimb]

Firefox isn't going to have the underlying support for presenting rgba16float textures in 2025H1, so this bug is no longer considered a webgpu-mvp blocker.

Comment 6

[Gabriel Wolf]

Having rgba16float available would be more than awesome. Currently I develop a spatial audio web app with an HDR visualizer. HDR display technology is available on many devices. I'd be happy to assist in testing as a developer and as a colorist on my calibrated monitors in any available color spaces. Best from Berlin, Gabriel

Comment 7

[Erich Gubler [:ErichDonGubler] (he/him)]

Attachment: Bug 1834395 - chore(webgpu): update bug ref. for `rgba16float` canvas texture format r=#webgpu-reviewers!

Comment 8

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/14bf9ed1fb4f
https://hg.mozilla.org/integration/autoland/rev/2dddc5019c08
chore(webgpu): update bug ref. for `rgba16float` canvas texture format r=webgpu-reviewers,teoxoy

Comment 9

[Martin Laxenaire]

Hi,

I agree having support for rgba16float canvas context texture format would definitely be helpful! Especially for things such as HDR display or specular environment maps skyboxes...

Best,

Comment 10

[Cosmin Sabou [:CosminS]]

https://hg.mozilla.org/mozilla-central/rev/2dddc5019c08