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Showing content from http://developer.mozilla.org/en-US/docs/Web/API/GPURenderPipeline/getBindGroupLayout below:

GPURenderPipeline: getBindGroupLayout() method - Web APIs

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The getBindGroupLayout() method of the GPURenderPipeline interface returns the pipeline's GPUBindGroupLayout object with the given index (i.e., included in the originating GPUDevice.createRenderPipeline() or GPUDevice.createRenderPipelineAsync() call's pipeline layout).

If the GPURenderPipeline was created with layout: "auto", this method is the only way to retrieve the GPUBindGroupLayouts generated by the pipeline.

getBindGroupLayout(index)

index

A number representing the index of the GPUBindGroupLayout to return.

A GPUBindGroupLayout object instance.

The following criteria must be met when calling getBindGroupLayout(), otherwise a GPUValidationError is generated and an invalid GPUBindGroupLayout object is returned:

• index is less than the number of GPUBindGroupLayout objects used in the pipeline layout.

Note: You can see complete working examples with getBindGroupLayout() in action in the WebGPU samples.

// …

// Create a render pipeline using layout: "auto" to automatically generate
// appropriate bind group layouts
const fullscreenQuadPipeline = device.createRenderPipeline({
  layout: "auto",
  vertex: {
    module: device.createShaderModule({
      code: fullscreenTexturedQuadWGSL,
    }),
    entryPoint: "vert_main",
  },
  fragment: {
    module: device.createShaderModule({
      code: fullscreenTexturedQuadWGSL,
    }),
    entryPoint: "frag_main",
    targets: [
      {
        format: presentationFormat,
      },
    ],
  },
  primitive: {
    topology: "triangle-list",
  },
});

// …

// Create a bind group with the auto-generated layout from the render pipeline
const showResultBindGroup = device.createBindGroup({
  layout: fullscreenQuadPipeline.getBindGroupLayout(0),
  entries: [
    {
      binding: 0,
      resource: sampler,
    },
    {
      binding: 1,
      resource: textures[1].createView(),
    },
  ],
});

// …

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