{"version":3,"file":"transformCIELAB.mjs","names":["delta","cielabForwardTransform","t","Math","cbrt","cielabReverseTransform","fromXYZ","xyz","transform","transformedY","toXYZ","lab","Ln"],"sources":["../../../src/util/color/transformCIELAB.ts"],"sourcesContent":["// Types\nimport type { LAB, XYZ } from '../colorUtils'\n\nconst delta = 0.20689655172413793 // 6÷29\n\nconst cielabForwardTransform = (t: number): number => (\n  t > delta ** 3\n    ? Math.cbrt(t)\n    : (t / (3 * delta ** 2)) + 4 / 29\n)\n\nconst cielabReverseTransform = (t: number): number => (\n  t > delta\n    ? t ** 3\n    : (3 * delta ** 2) * (t - 4 / 29)\n)\n\nexport function fromXYZ (xyz: XYZ): LAB {\n  const transform = cielabForwardTransform\n  const transformedY = transform(xyz[1])\n\n  return [\n    116 * transformedY - 16,\n    500 * (transform(xyz[0] / 0.95047) - transformedY),\n    200 * (transformedY - transform(xyz[2] / 1.08883)),\n  ]\n}\n\nexport function toXYZ (lab: LAB): XYZ {\n  const transform = cielabReverseTransform\n  const Ln = (lab[0] + 16) / 116\n  return [\n    transform(Ln + lab[1] / 500) * 0.95047,\n    transform(Ln),\n    transform(Ln - lab[2] / 200) * 1.08883,\n  ]\n}\n"],"mappings":"AAAA;;AAGA,MAAMA,KAAK,GAAG,mBAAmB,EAAC;;AAElC,MAAMC,sBAAsB,GAAIC,CAAS,IACvCA,CAAC,GAAGF,KAAK,IAAI,CAAC,GACVG,IAAI,CAACC,IAAI,CAACF,CAAC,CAAC,GACXA,CAAC,IAAI,CAAC,GAAGF,KAAK,IAAI,CAAC,CAAC,GAAI,CAAC,GAAG,EAClC;AAED,MAAMK,sBAAsB,GAAIH,CAAS,IACvCA,CAAC,GAAGF,KAAK,GACLE,CAAC,IAAI,CAAC,GACL,CAAC,GAAGF,KAAK,IAAI,CAAC,IAAKE,CAAC,GAAG,CAAC,GAAG,EAAE,CACnC;AAED,OAAO,SAASI,OAAOA,CAAEC,GAAQ,EAAO;EACtC,MAAMC,SAAS,GAAGP,sBAAsB;EACxC,MAAMQ,YAAY,GAAGD,SAAS,CAACD,GAAG,CAAC,CAAC,CAAC,CAAC;EAEtC,OAAO,CACL,GAAG,GAAGE,YAAY,GAAG,EAAE,EACvB,GAAG,IAAID,SAAS,CAACD,GAAG,CAAC,CAAC,CAAC,GAAG,OAAO,CAAC,GAAGE,YAAY,CAAC,EAClD,GAAG,IAAIA,YAAY,GAAGD,SAAS,CAACD,GAAG,CAAC,CAAC,CAAC,GAAG,OAAO,CAAC,CAAC,CACnD;AACH;AAEA,OAAO,SAASG,KAAKA,CAAEC,GAAQ,EAAO;EACpC,MAAMH,SAAS,GAAGH,sBAAsB;EACxC,MAAMO,EAAE,GAAG,CAACD,GAAG,CAAC,CAAC,CAAC,GAAG,EAAE,IAAI,GAAG;EAC9B,OAAO,CACLH,SAAS,CAACI,EAAE,GAAGD,GAAG,CAAC,CAAC,CAAC,GAAG,GAAG,CAAC,GAAG,OAAO,EACtCH,SAAS,CAACI,EAAE,CAAC,EACbJ,SAAS,CAACI,EAAE,GAAGD,GAAG,CAAC,CAAC,CAAC,GAAG,GAAG,CAAC,GAAG,OAAO,CACvC;AACH","ignoreList":[]}