Crash on Firefox nightly

[kekeblom]

Tried to run using the brewery scene. Had to install Firefox nightly on Ubuntu 20.04 to try this.

This is the error I get in the Javascript console, right after loading the ply point cloud file.

Uncaught DOMException: GPUCanvasContext.getCurrentTexture: Canvas not configured
    draw renderer.ts:189
    animate renderer.ts:278
    t renderer.ts:137
    t renderer.ts:137
    kt renderer.ts:171
    s renderer.ts:41
    s renderer.ts:22
    a renderer.ts:13
    promise callback*c renderer.ts:15
    a renderer.ts:13
    promise callback*c renderer.ts:15
    bt renderer.ts:16
    bt renderer.ts:12
    init renderer.ts:141
    o index.ts:65
    s index.ts:32
    s index.ts:13
    <anonymous> index.ts:7
    <anonymous> index.ts:3
    promise callback* index.ts:84
    EventListener.handleEvent* index.ts:91
    <anonymous> main.js:1
   Encountered one or more errors while creating shader module

WebGPU compilation info for shader module (1 error(s), 0 warning(s), 0 info)

Shader validation error: 
    ┌─ :207:22
    │
207 │     let quadOffset = quadVertices[quadIndex];
    │                      ^^^^^^^^^^^^^^^^^^^^^^^ naga::Expression [8]

Error matching VERTEX shader requirements against the pipeline, caused by: Shader module is invalid

[jatentaki]

Thanks for your report, I wonder if that could be because of unfinished impl of webGPU in firefox. May have a look but it's currently not a priority for me :(

[kekeblom]

No problem. Is there currently a known setup that works on Ubuntu or are you running this under Windows?

[jatentaki]

I am running on MacOS + Chrome/Chromium stable. Just tried on Ubuntu22 + FF nightly to the same effect as you. I managed to get the viewer to work correctly with Chrome dev using the instructions from here:

1. Install chrome dev
2. Run from command line with extra flags google-chrome-unstable --enable-features=Vulkan,UseSkiaRenderer.
3. Go to chrome://flags/#enable-unsafe-webgpu and enable webgpu. This will require you to restart the browser (and start it again with the same flags).

Please let me know if it works for you :)

[jatentaki]

For future reference: the error mentioned by @kekeblom happens at a line which performs vertex pulling which is specifically mentioned as missing for firefox/servo, albeit only for metal (and the bug occurs on ubuntu as well). Perhaps when this is fixed on FF side the renderer will start to work there.