/// <reference types="node" />
import { PNG } from 'pngjs';
import RGBAColor from '../types/RGBAColor';
declare function blobToBase64(png: PNG): Promise<string>;
declare function getBuffer(png: PNG): Buffer;
declare function getRgbaColor(hex?: string): RGBAColor;
declare function render(bitmap: number[], width: number, height: number, backgroundColor?: string, foregroundColor?: string): PNG;
declare const _default: {
    blobToBase64: typeof blobToBase64;
    getBuffer: typeof getBuffer;
    getRgbaColor: typeof getRgbaColor;
    render: typeof render;
};
export default _default;