1880742 - [webgpu] https://iamferm.in/webgpu-path-tracing/ does not draw anything

Status: RESOLVED FIXED

(Core :: Graphics: WebGPU, defect)

Description

[Mayank Bansal]

Go to https://iamferm.in/webgpu-path-tracing/
AR: Nothing is drawn on the scren. Chrome does draw.

11:24:37.225 Shader module creation failed: Shader validation error
11:24:37.225
Encountered one or more errors while creating shader module "Compute shader"
11:24:37.226
WebGPU compilation info for shader module "Compute shader" (1 error(s), 0 warning(s), 0 info)
11:24:37.226

Shader validation error:
┌─ Compute shader:165:1
│
165 │ ╭ fn ray_color(r : Ray) -> vec3f {
166 │ │
167 │ │ var depth = 0;
168 │ │ var color = vec3(0.0, 0.0, 0.0); // background color
· │
206 │ │ * 1/(pow(shadow_hit.t, 2))
│ │ ^^^ naga::Expression [93]
· │
226 │ │ color = final_color*bounced_color;
227 │ │ return color;
│ ╰───────────────^ naga::Function [9]

11:24:37.226 Error matching shader requirements against the pipeline, caused by: Shader module is invalid
11:24:37.241 Pipeline is invalid
11:24:37.241 Bind group layout is invalid
11:24:37.566 In a set_pipeline command, caused by: Compute pipeline Id(0,1,d3d12) is invalid
11:24:37.566 In a pass parameter, caused by: Command encoder is invalid
11:24:37.566 Command encoder is invalid

​

Comment 1

[Mayank Bansal]

Attachment: about:support

Comment 2

[Mayank Bansal]

Profilw with webgpu preset logging: https://share.firefox.dev/3Zu53fQ

Error in web console:
12:05:18.723 Uncaptured WebGPU error: Shader module creation failed: Shader validation error
12:05:18.723
Encountered one or more errors while creating shader module "Compute shader"
12:05:18.723
WebGPU compilation info for shader module "Compute shader" (1 error(s), 0 warning(s), 0 info)
12:05:18.723

Shader validation error: Function [8] 'ray_color' is invalid
┌─ Compute shader:172:1
│
172 │ ╭ fn ray_color(r : Ray) -> vec3f {
173 │ │
174 │ │ var depth = 0;
175 │ │ var color = vec3(0.0, 0.0, 0.0); // background color
· │
220 │ │ * 1/(pow(shadow_hit.t, 2))
│ │ ^^^ naga::Expression [114]
· │
240 │ │ color = final_color*bounced_color;
241 │ │ return color;
│ ╰───────────────^ naga::Function [8]
│
= Expression [114] is invalid
= Argument [1] to Pow as expression [113] has an invalid type.

12:05:18.723 Uncaptured WebGPU error: ShaderModule with 'Compute shader' label is invalid
12:05:18.726 Uncaptured WebGPU error: ComputePipeline with 'Compute pipeline' label is invalid
12:05:18.726 Uncaptured WebGPU error: BindGroupLayout with '' label is invalid
12:05:18.726 Uncaptured WebGPU error: In a set_pipeline command, caused by: ComputePipeline with 'Compute pipeline' label is invalid
12:05:18.726 Uncaptured WebGPU error: Command encoder is locked by a previously created render/compute pass. Before recording any new commands, the pass must be ended.
12:05:18.726 Uncaptured WebGPU error: Command encoder is invalid

Comment 3

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

Latest error messages indicate a blocker on bug 1829879, which is unsurprising.

Comment 4

[Andy Leiserson [:aleiserson]]

pow

Comment 5

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

WFM now!