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GPUShaderModule - Web APIs | MDN

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The GPUShaderModule interface of the WebGPU API represents an internal shader module object, a container for WGSL shader code that can be submitted to the GPU for execution by a pipeline.

A GPUShaderModule object instance is created using GPUDevice.createShaderModule().

label

A string providing a label that can be used to identify the object, for example in GPUError messages or console warnings.

getCompilationInfo()

Returns a Promise that fulfills with a GPUCompilationInfo object containing messages generated during the GPUShaderModule's compilation.

In our basic render demo, our shader module is created using the following code:

const shaders = `
struct VertexOut {
  @builtin(position) position : vec4f,
  @location(0) color : vec4f
}

@vertex
fn vertex_main(@location(0) position: vec4f,
               @location(1) color: vec4f) -> VertexOut
{
  var output : VertexOut;
  output.position = position;
  output.color = color;
  return output;
}

@fragment
fn fragment_main(fragData: VertexOut) -> @location(0) vec4f
{
  return fragData.color;
}
`;

async function init() {
  if (!navigator.gpu) {
    throw Error("WebGPU not supported.");
  }

  const adapter = await navigator.gpu.requestAdapter();

  if (!adapter) {
    throw Error("Couldn't request WebGPU adapter.");
  }

  const device = await adapter.requestDevice();

  // …
  // later on

  const shaderModule = device.createShaderModule({
    code: shaders,
  });

  // …
}

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