Edit File: convertXyz50ToProphoto.js
/* Convert CIE XYZ D50 values to ProPhoto RGB References: * https://drafts.csswg.org/css-color/#color-conversion-code * http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html */ const gamma = v => { let abs = Math.abs(v); if (abs >= 1 / 512) { return Math.sign(v) * Math.pow(abs, 1 / 1.8); } return 16 * v; }; const convertXyz50ToProphoto = ({ x, y, z, alpha }) => { let res = { mode: 'prophoto', r: gamma( x * 1.3457868816471585 - y * 0.2555720873797946 - 0.0511018649755453 * z ), g: gamma( x * -0.5446307051249019 + y * 1.5082477428451466 + 0.0205274474364214 * z ), b: gamma(x * 0.0 + y * 0.0 + 1.2119675456389452 * z) }; if (alpha !== undefined) { res.alpha = alpha; } return res; }; export default convertXyz50ToProphoto;
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