matrix/js/resurrectionPass.js

import { loadText, extractEntries, make1DTexture, makePassFBO, makePass } from "./utils.js";

const colorToRGB = ([hue, saturation, lightness]) => {
	const a = saturation * Math.min(lightness, 1 - lightness);
	const f = (n) => {
		const k = (n + hue * 12) % 12;
		return lightness - a * Math.max(-1, Math.min(k - 3, 9 - k, 1));
	};
	return [f(0), f(8), f(4)];
};

export default (regl, config, inputs) => {
	const output = makePassFBO(regl, config.useHalfFloat);

	const resurrectionPassFrag = loadText("../shaders/resurrectionPass.frag");

	const render = regl({
		frag: regl.prop("frag"),

		uniforms: {
			...extractEntries(config, ["backgroundColor"]),
			tex: inputs.primary,
			bloomTex: inputs.bloom,
			ditherMagnitude: 0.05,
		},
		framebuffer: output,
	});

	return makePass(
		{
			primary: output,
		},
		() => render({ frag: resurrectionPassFrag.text() })
	);
};