{"version":3,"file":"transformSRGB.mjs","names":["clamp","srgbForwardMatrix","srgbForwardTransform","C","srgbReverseMatrix","srgbReverseTransform","fromXYZ","xyz","rgb","Array","transform","matrix","i","Math","round","r","g","b","toXYZ","_ref"],"sources":["../../../src/util/color/transformSRGB.ts"],"sourcesContent":["// Utilities\nimport { clamp } from '@/util/helpers'\n\n// Types\nimport type { RGB, XYZ } from '../colorUtils'\n\n// For converting XYZ to sRGB\nconst srgbForwardMatrix = [\n  [3.2406, -1.5372, -0.4986],\n  [-0.9689, 1.8758, 0.0415],\n  [0.0557, -0.2040, 1.0570],\n]\n\n// Forward gamma adjust\nconst srgbForwardTransform = (C: number): number => (\n  C <= 0.0031308\n    ? C * 12.92\n    : 1.055 * C ** (1 / 2.4) - 0.055\n)\n\n// For converting sRGB to XYZ\nconst srgbReverseMatrix = [\n  [0.4124, 0.3576, 0.1805],\n  [0.2126, 0.7152, 0.0722],\n  [0.0193, 0.1192, 0.9505],\n]\n\n// Reverse gamma adjust\nconst srgbReverseTransform = (C: number): number => (\n  C <= 0.04045\n    ? C / 12.92\n    : ((C + 0.055) / 1.055) ** 2.4\n)\n\nexport function fromXYZ (xyz: XYZ): RGB {\n  const rgb = Array(3)\n  const transform = srgbForwardTransform\n  const matrix = srgbForwardMatrix\n\n  // Matrix transform, then gamma adjustment\n  for (let i = 0; i < 3; ++i) {\n    // Rescale back to [0, 255]\n    rgb[i] = Math.round(clamp(transform(\n      matrix[i][0] * xyz[0] +\n      matrix[i][1] * xyz[1] +\n      matrix[i][2] * xyz[2]\n    )) * 255)\n  }\n\n  return {\n    r: rgb[0],\n    g: rgb[1],\n    b: rgb[2],\n  }\n}\n\nexport function toXYZ ({ r, g, b }: RGB): XYZ {\n  const xyz: XYZ = [0, 0, 0]\n  const transform = srgbReverseTransform\n  const matrix = srgbReverseMatrix\n\n  // Rescale from [0, 255] to [0, 1] then adjust sRGB gamma to linear RGB\n  r = transform(r / 255)\n  g = transform(g / 255)\n  b = transform(b / 255)\n\n  // Matrix color space transform\n  for (let i = 0; i < 3; ++i) {\n    xyz[i] = matrix[i][0] * r + matrix[i][1] * g + matrix[i][2] * b\n  }\n\n  return xyz\n}\n"],"mappings":"AAAA;AAAA,SACSA,KAAK,0BAEd;AAGA;AACA,MAAMC,iBAAiB,GAAG,CACxB,CAAC,MAAM,EAAE,CAAC,MAAM,EAAE,CAAC,MAAM,CAAC,EAC1B,CAAC,CAAC,MAAM,EAAE,MAAM,EAAE,MAAM,CAAC,EACzB,CAAC,MAAM,EAAE,CAAC,MAAM,EAAE,MAAM,CAAC,CAC1B;;AAED;AACA,MAAMC,oBAAoB,GAAIC,CAAS,IACrCA,CAAC,IAAI,SAAS,GACVA,CAAC,GAAG,KAAK,GACT,KAAK,GAAGA,CAAC,KAAK,CAAC,GAAG,GAAG,CAAC,GAAG,KAC9B;;AAED;AACA,MAAMC,iBAAiB,GAAG,CACxB,CAAC,MAAM,EAAE,MAAM,EAAE,MAAM,CAAC,EACxB,CAAC,MAAM,EAAE,MAAM,EAAE,MAAM,CAAC,EACxB,CAAC,MAAM,EAAE,MAAM,EAAE,MAAM,CAAC,CACzB;;AAED;AACA,MAAMC,oBAAoB,GAAIF,CAAS,IACrCA,CAAC,IAAI,OAAO,GACRA,CAAC,GAAG,KAAK,GACT,CAAC,CAACA,CAAC,GAAG,KAAK,IAAI,KAAK,KAAK,GAC9B;AAED,OAAO,SAASG,OAAOA,CAAEC,GAAQ,EAAO;EACtC,MAAMC,GAAG,GAAGC,KAAK,CAAC,CAAC,CAAC;EACpB,MAAMC,SAAS,GAAGR,oBAAoB;EACtC,MAAMS,MAAM,GAAGV,iBAAiB;;EAEhC;EACA,KAAK,IAAIW,CAAC,GAAG,CAAC,EAAEA,CAAC,GAAG,CAAC,EAAE,EAAEA,CAAC,EAAE;IAC1B;IACAJ,GAAG,CAACI,CAAC,CAAC,GAAGC,IAAI,CAACC,KAAK,CAACd,KAAK,CAACU,SAAS,CACjCC,MAAM,CAACC,CAAC,CAAC,CAAC,CAAC,CAAC,GAAGL,GAAG,CAAC,CAAC,CAAC,GACrBI,MAAM,CAACC,CAAC,CAAC,CAAC,CAAC,CAAC,GAAGL,GAAG,CAAC,CAAC,CAAC,GACrBI,MAAM,CAACC,CAAC,CAAC,CAAC,CAAC,CAAC,GAAGL,GAAG,CAAC,CAAC,CACtB,CAAC,CAAC,GAAG,GAAG,CAAC;EACX;EAEA,OAAO;IACLQ,CAAC,EAAEP,GAAG,CAAC,CAAC,CAAC;IACTQ,CAAC,EAAER,GAAG,CAAC,CAAC,CAAC;IACTS,CAAC,EAAET,GAAG,CAAC,CAAC;EACV,CAAC;AACH;AAEA,OAAO,SAASU,KAAKA,CAAAC,IAAA,EAAyB;EAAA,IAAvB;IAAEJ,CAAC;IAAEC,CAAC;IAAEC;EAAO,CAAC,GAAAE,IAAA;EACrC,MAAMZ,GAAQ,GAAG,CAAC,CAAC,EAAE,CAAC,EAAE,CAAC,CAAC;EAC1B,MAAMG,SAAS,GAAGL,oBAAoB;EACtC,MAAMM,MAAM,GAAGP,iBAAiB;;EAEhC;EACAW,CAAC,GAAGL,SAAS,CAACK,CAAC,GAAG,GAAG,CAAC;EACtBC,CAAC,GAAGN,SAAS,CAACM,CAAC,GAAG,GAAG,CAAC;EACtBC,CAAC,GAAGP,SAAS,CAACO,CAAC,GAAG,GAAG,CAAC;;EAEtB;EACA,KAAK,IAAIL,CAAC,GAAG,CAAC,EAAEA,CAAC,GAAG,CAAC,EAAE,EAAEA,CAAC,EAAE;IAC1BL,GAAG,CAACK,CAAC,CAAC,GAAGD,MAAM,CAACC,CAAC,CAAC,CAAC,CAAC,CAAC,GAAGG,CAAC,GAAGJ,MAAM,CAACC,CAAC,CAAC,CAAC,CAAC,CAAC,GAAGI,CAAC,GAAGL,MAAM,CAACC,CAAC,CAAC,CAAC,CAAC,CAAC,GAAGK,CAAC;EACjE;EAEA,OAAOV,GAAG;AACZ","ignoreList":[]}