Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | 5x 5x 11216x 11216x 11216x | import { roundToPrecisionSmall } from "./math-utilities";
/**
* {@link https://en.wikipedia.org/wiki/CIELAB_color_space | CIELAB color space}
* This implementation uses the D65 constants for 2 degrees. That determines the constants used for the pure white point of the XYZ space of 0.95047, 1.0, 1.08883.
* {@link https://en.wikipedia.org/wiki/Illuminant_D65}
* These constants determine how the XYZ, LCH and LAB colors convert to/from RGB.
*
* @public
*/
export class ColorLAB {
public static readonly epsilon: number = 216 / 24389;
public static readonly kappa: number = 24389 / 27;
/**
* Construct a {@link ColorLAB} from a config object.
*/
public static fromObject(data: { l: number; a: number; b: number }): ColorLAB | null {
if (data && !isNaN(data.l) && !isNaN(data.a) && !isNaN(data.b)) {
return new ColorLAB(data.l, data.a, data.b);
}
return null;
}
constructor(l: number, a: number, b: number) {
this.l = l;
this.a = a;
this.b = b;
}
public readonly l: number;
public readonly a: number;
public readonly b: number;
/**
* Determines if a color is equal to another
* @param rhs - the value to compare
*/
public equalValue(rhs: ColorLAB): boolean {
return this.l === rhs.l && this.a === rhs.a && this.b === rhs.b;
}
/**
* Returns a new {@link ColorLAB} rounded to the provided precision
* @param precision - the precision to round to
*/
public roundToPrecision(precision: number): ColorLAB {
return new ColorLAB(
roundToPrecisionSmall(this.l, precision),
roundToPrecisionSmall(this.a, precision),
roundToPrecisionSmall(this.b, precision)
);
}
/**
* Returns the {@link ColorLAB} formatted as an object.
*/
public toObject(): { l: number; a: number; b: number } {
return { l: this.l, a: this.a, b: this.b };
}
}
|