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Language

Functions

Shader

WGSL defines three shader stages, corresponding to the programmable stages of pipelines: vertex, fragment, and compute.

Vertex Shader

A vertex shader program maps input attributes for a single vertex into output attributes for the vertex. The @vertex attribute denotes a vertex shader entry point. 

@vertex
fn vert_main() -> @builtin(position) vec4<f32> {
  return vec4<f32>(0.0, 0.0, 0.0, 1.0);
}

Fragment Shader

A fragment shader program processes each fragment, possibly producing a fragment output. The @fragment attribute denotes a fragment shader entry point. 

@fragment
fn frag_main(@builtin(position) coord_in: vec4<f32>) -> @location(0) vec4<f32> {
  return vec4<f32>(coord_in.x, coord_in.y, 0.0, 1.0);
}

Compute Shader

A compute shader program runs over a logical grid of points with a controllable amount of parallelism, while reading and possibly updating buffer and image resources. The @compute attribute together with the @workgroup_size denote a compute shader entry point. 

@compute @workgroup_size(1)
fn comp_main() {
}