38 lines
897 B
TypeScript
38 lines
897 B
TypeScript
import {ColorValue} from "../models/Colors";
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import iro from "@jaames/iro";
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export function kelvinToColorValue(rawKelvin: number): ColorValue {
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const kelvin = normalizeKelvin(rawKelvin);
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return kelvinTable[kelvin];
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}
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export function kelvinToRgbHex(rawKelvin: number): string {
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const kelvin = normalizeKelvin(rawKelvin);
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const c = new iro.Color();
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c.kelvin = kelvin;
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return c.hexString;
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}
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function normalizeKelvin(kelvin: number): number {
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if (kelvin < 1000) {
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return 1000;
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} else if (kelvin > 10000) {
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return 10000;
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} else {
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return kelvin - (kelvin % 100);
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}
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}
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const kelvinTable: {[key: number]: ColorValue} = {};
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for (let kelvin = 1000; kelvin <= 10000; kelvin += 100) {
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const c = new iro.Color();
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c.kelvin = kelvin;
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const [h, s] = [c.hsv.h, (c.hsv.s as number) / 100];
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kelvinTable[kelvin] = {h, s, kelvin};
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}
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