src/enums/MaskFunction.js

/**
 * A mask function enumeration.
 *
 * @type {Object}
 * @property {Number} DISCARD - Discards elements when the respective mask value is zero.
 * @property {Number} MULTIPLY - Multiplies the input buffer with the mask texture.
 * @property {Number} MULTIPLY_RGB_SET_ALPHA - Multiplies the input RGB values with the mask and sets alpha to the mask value.
 * @property {Number} MULTIPLY_RGB - Multiplies the input RGB values with the mask and keeps the original alpha.
 */

export const MaskFunction = {
	DISCARD: 0,
	MULTIPLY: 1,
	MULTIPLY_RGB_SET_ALPHA: 2,
	MULTIPLY_RGB: 3
};