1863457 - [webGPU] Demo at https://math.hws.edu/graphicsbook/demos/c9/diffusion-demo.html does not draw anything on Nightly

Status: RESOLVED FIXED

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

Description

[Mayank Bansal]

enable webgpu
Go to https://math.hws.edu/graphicsbook/demos/c9/
Open any demo

AR: Demo does not run

Comment 1

[Nicolas Silva [:nical]]

Looks like most of the errors are related to abstract types.

Comment 2

[Mayank Bansal]

FWIW, as of today, across all the "chapter" on the FTP site, only this demo doesnt run:

https://math.hws.edu/graphicsbook/demos/c9/diffusion-demo.html

16:55:22.151
Encountered one or more errors while creating shader module
16:55:22.151
WebGPU compilation info for shader module (1 error(s), 0 warning(s), 0 info)
16:55:22.151

Shader validation error:
┌─ :18:16
│
18 │ return colors[colorIndex];
│ ^^^^^^^^^^^^^^^^^^ naga::Expression [13]

​

Comment 3

[Mayank Bansal]

10:04:41.057 injected firefox content.js:142:11
10:04:41.682
Encountered one or more errors while creating shader module
10:04:41.682
WebGPU compilation info for shader module (1 error(s), 0 warning(s), 0 info)
10:04:41.682

Shader validation error:
┌─ :18:16
│
18 │ return colors[colorIndex];
│ ^^^^^^^^^^^^^^^^^^ naga::Expression [12]

​

Comment 4

[Mayank Bansal]

Profile with webgpu preset logging: https://share.firefox.dev/3ZsOSAJ

Error in webdev console:

18:23:52.132 injected firefox content.js:142:11
18:23:52.196
Encountered one or more errors while creating shader module
18:23:52.196
WebGPU compilation info for shader module (1 error(s), 0 warning(s), 0 info)
18:23:52.196

Shader '' parsing error: invalid switch value
   ┌─ wgsl:40:18
   │
40 │             case 0 {
   │                  ^ expected unsigned integer
   │
   = note: suffix the integer with a `u`: '0u'

Comment 5

[Andy Leiserson [:aleiserson]]

Working in a local build with https://github.com/gfx-rs/wgpu/pull/7250.