playcanvas
Version:
PlayCanvas WebGL game engine
35 lines (33 loc) • 1.04 kB
JavaScript
var encodePS = `
fn encodeLinear(source: vec3f) -> vec4f {
return vec4f(source, 1.0);
}
fn encodeGamma(source: vec3f) -> vec4f {
return vec4f(pow(source + vec3f(0.0000001), vec3f(1.0 / 2.2)), 1.0);
}
fn encodeRGBM(source: vec3f) -> vec4f {
var color: vec3f = pow(source, vec3f(0.5));
color *= 1.0 / 8.0;
var a: f32 = saturate(max(max(color.r, color.g), max(color.b, 1.0 / 255.0)));
a = ceil(a * 255.0) / 255.0;
color /= a;
return vec4f(color, a);
}
fn encodeRGBP(source: vec3f) -> vec4f {
var gamma: vec3f = pow(source, vec3f(0.5));
var maxVal: f32 = min(8.0, max(1.0, max(gamma.x, max(gamma.y, gamma.z))));
var v: f32 = 1.0 - ((maxVal - 1.0) / 7.0);
v = ceil(v * 255.0) / 255.0;
return vec4f(gamma / (-v * 7.0 + 8.0), v);
}
fn encodeRGBE(source: vec3f) -> vec4f {
var maxVal: f32 = max(source.x, max(source.y, source.z));
if (maxVal < 1e-32) {
return vec4f(0.0, 0.0, 0.0, 0.0);
} else {
var e: f32 = ceil(log2(maxVal));
return vec4f(source / pow(2.0, e), (e + 128.0) / 255.0);
}
}
`;
export { encodePS as default };