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61 lines
1.6 KiB
61 lines
1.6 KiB
"use strict";
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exports.__esModule = true;
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exports["default"] = void 0;
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function colorToInt(color) {
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return Math.round(color * 255);
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}
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function convertToInt(red, green, blue) {
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return colorToInt(red) + "," + colorToInt(green) + "," + colorToInt(blue);
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}
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function hslToRgb(hue, saturation, lightness, convert) {
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if (convert === void 0) {
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convert = convertToInt;
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}
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if (saturation === 0) {
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// achromatic
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return convert(lightness, lightness, lightness);
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} // formulae from https://en.wikipedia.org/wiki/HSL_and_HSV
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var huePrime = (hue % 360 + 360) % 360 / 60;
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var chroma = (1 - Math.abs(2 * lightness - 1)) * saturation;
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var secondComponent = chroma * (1 - Math.abs(huePrime % 2 - 1));
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var red = 0;
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var green = 0;
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var blue = 0;
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if (huePrime >= 0 && huePrime < 1) {
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red = chroma;
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green = secondComponent;
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} else if (huePrime >= 1 && huePrime < 2) {
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red = secondComponent;
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green = chroma;
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} else if (huePrime >= 2 && huePrime < 3) {
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green = chroma;
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blue = secondComponent;
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} else if (huePrime >= 3 && huePrime < 4) {
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green = secondComponent;
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blue = chroma;
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} else if (huePrime >= 4 && huePrime < 5) {
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red = secondComponent;
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blue = chroma;
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} else if (huePrime >= 5 && huePrime < 6) {
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red = chroma;
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blue = secondComponent;
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}
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var lightnessModification = lightness - chroma / 2;
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var finalRed = red + lightnessModification;
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var finalGreen = green + lightnessModification;
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var finalBlue = blue + lightnessModification;
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return convert(finalRed, finalGreen, finalBlue);
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}
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var _default = hslToRgb;
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exports["default"] = _default;
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module.exports = exports.default; |