antd-color-editor/lib/utils/getAlphaColor.js

An open-source color editor for designing color system

var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
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  if (from && typeof from === "object" || typeof from === "function") {
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  return to;
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var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
  // If the importer is in node compatibility mode or this is not an ESM
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  mod
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var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// src/utils/getAlphaColor.ts
var getAlphaColor_exports = {};
__export(getAlphaColor_exports, {
  default: () => getAlphaColor_default
});
module.exports = __toCommonJS(getAlphaColor_exports);
var import_chroma_js = __toESM(require("chroma-js"));
function isStableColor(color) {
  return color >= 0 && color <= 255;
}
function arrayToRgb(rgbArray) {
  return rgbArray.length < 4 ? `rgb(${rgbArray.join(",")})` : `rgba(${rgbArray.join(",")})`;
}
function getAlphaColor(frontColor, backgroundColor) {
  const [fR, fG, fB] = (0, import_chroma_js.default)(frontColor).rgb();
  const [bR, bG, bB] = (0, import_chroma_js.default)(backgroundColor).rgb();
  for (let fA = 0.01; fA <= 1; fA += 0.01) {
    const r = Math.round((fR - bR * (1 - fA)) / fA);
    const g = Math.round((fG - bG * (1 - fA)) / fA);
    const b = Math.round((fB - bB * (1 - fA)) / fA);
    if (isStableColor(r) && isStableColor(g) && isStableColor(b))
      return (0, import_chroma_js.default)(arrayToRgb([r, g, b, Math.round(fA * 100) / 100])).hex();
  }
  return (0, import_chroma_js.default)(arrayToRgb([fR, fG, fB, 1])).hex();
}
var getAlphaColor_default = getAlphaColor;