playcanvas

Version:

PlayCanvas WebGL game engine

23 lines (21 loc) • 689 B

JavaScript

var tonemappingNeutralPS = `
uniform exposure: f32;
fn toneMap(col: vec3f) -> vec3f {
	var color = col * uniform.exposure;
	let startCompression = 0.8 - 0.04;
	let desaturation = 0.15;
	let x = min(color.r, min(color.g, color.b));
	let offset = select(0.04, x - 6.25 * x * x, x < 0.08);
	color -= vec3f(offset);
	let peak = max(color.r, max(color.g, color.b));
	if (peak < startCompression) {
		return color;
	}
	let d = 1.0 - startCompression;
	let newPeak = 1.0 - d * d / (peak + d - startCompression);
	color *= newPeak / peak;
	let g = 1.0 - 1.0 / (desaturation * (peak - newPeak) + 1.0);
	return mix(color, vec3f(newPeak), vec3f(g));
}
`;

export { tonemappingNeutralPS as default };