29 lines
974 B
JavaScript
29 lines
974 B
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.fromXYZ = fromXYZ;
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exports.toXYZ = toXYZ;
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var delta = 0.20689655172413793; // 6÷29
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var cielabForwardTransform = function cielabForwardTransform(t) {
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return t > Math.pow(delta, 3) ? Math.cbrt(t) : t / (3 * Math.pow(delta, 2)) + 4 / 29;
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};
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var cielabReverseTransform = function cielabReverseTransform(t) {
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return t > delta ? Math.pow(t, 3) : 3 * Math.pow(delta, 2) * (t - 4 / 29);
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};
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function fromXYZ(xyz) {
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var transform = cielabForwardTransform;
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var transformedY = transform(xyz[1]);
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return [116 * transformedY - 16, 500 * (transform(xyz[0] / 0.95047) - transformedY), 200 * (transformedY - transform(xyz[2] / 1.08883))];
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}
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function toXYZ(lab) {
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var transform = cielabReverseTransform;
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var Ln = (lab[0] + 16) / 116;
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return [transform(Ln + lab[1] / 500) * 0.95047, transform(Ln), transform(Ln - lab[2] / 200) * 1.08883];
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}
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//# sourceMappingURL=transformCIELAB.js.map
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