{}

// Discard the fragment if the source texture doesn't
// have the stencil_val.
@fragment fn frag_check_src_stencil(input : VertexOutputs) {
  // Load the source stencil value.
  let src_val : u32 = textureLoadGeneral(
    src_tex, vec2u(input.position.xy) - params.origin, 0u)[0];

  // Discard it if it doesn't contain the stencil reference.
  if ((src_val & input.stencil_val) == 0u) {
    discard;
  }
}