sharp-vibrant/src/filter/index.ts

Extract prominent colors from an image in a node environment using sharp.

import type { Filter } from '../typing';

export { default as Default } from './default';

export function combineFilters(filters: Filter[]): Filter | null {
  // TODO: caching
  if (!Array.isArray(filters) || filters.length === 0) return null;

  return (r: number, g: number, b: number, a: number) => {
    if (a === 0) return false;
    for (let i = 0; i < filters.length; i += 1) {
      if (!filters[i](r, g, b, a)) return false;
    }
    return true;
  };
}