Skia WebGPU backend

[Joe]

Hey there, 

I was looking at the Skia compilation flags and found `skia_use_webgpu`, which left me wondering, is the WebGPU backend stable and working? 

I know WebGPU is still not supported by all browsers, and gained support in Chrome fairly recently, but still wondering if the backend is currently a work in progress, or considered stable.

Thank you! 

[Ruan Beihong]

+1 for that question.

And what is the current status for Graphite (which suppose to be better suited for dawn)?

[Jim Van Verth]

Despite that GN arg, there's no active work on supporting WebGPU for the original GPU backend, just WebGL. As far as Graphite, it's in progress but not yet feature-complete. It has a reasonably complete Dawn backend but I don't believe anyone has done any work yet to get it running on WebGPU per se.

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Jim Van Verth | Software Engineer | Google.com

[Brian Osman]

Right. In particular, Skia currently uses a SPIR-V backend when generating shaders for Dawn. This works with Dawn-native, but not WebGPU. The WGSL shader backend is not yet complete. Work on that has just recently resumed.

To view this discussion on the web visit https://groups.google.com/d/msgid/skia-discuss/CAM5o3G2mB_0XYEzgLjq5wYffOcgKs4j6-fc67QPaw94%3Dv%3DDPtg%40mail.gmail.com.

[Joe]

Ok, that's good to know. Thank you both for the info!