playcanvas/build/playcanvas.dbg/src/scene/shader-lib/wgsl/chunks/common/frag/bayer.js

Open-source WebGL/WebGPU 3D engine for the web

var bayer_default = (
  /* wgsl */
  `
// 2x2 bayer matrix [1 2][3 0], p in [0,1]
fn bayer2(p: vec2f) -> f32 {
    return (2.0 * p.y + p.x + 1.0) % 4.0;
}

// 4x4 matrix, p - pixel coordinate
fn bayer4(p: vec2f) -> f32 {
    let p1: vec2f = p % vec2f(2.0);
    let p2: vec2f = floor(0.5 * (p % vec2f(4.0)));
    return 4.0 * bayer2(p1) + bayer2(p2);
}

// 8x8 matrix, p - pixel coordinate
fn bayer8(p: vec2f) -> f32 {
    let p1: vec2f = p % vec2f(2.0);
    let p2: vec2f = floor(0.5 * (p % vec2f(4.0)));
    let p4: vec2f = floor(0.25 * (p % vec2f(8.0)));
    return 4.0 * (4.0 * bayer2(p1) + bayer2(p2)) + bayer2(p4);
}
`
);
export {
  bayer_default as default
};