declare enum Action {
    NONE = 0,
    LOAD = 1,
    DISPLAY = 2,
    STOP = 3
}
declare enum Mode {
    RGB = 0,
    BW = 1,
    INVERT = 2,
    BW_INVERT = 3,
    RGB_CHANNELS = 4,
    INVERT_CHANNELS = 5
}
interface fdOutgoingPosition {
    x: number;
    y: number;
    w: number;
    h: number;
}
interface fdOutgoingMessage {
    action: Action;
    image: string;
    mode?: Mode;
    position?: fdOutgoingPosition;
    exposure?: number[];
}
interface fdIncomingMessage {
    action: Action;
    data?: number;
    success: boolean;
    error?: string;
}
interface fdResult {
    action: Action;
    image: string;
    reported?: number;
    elapsed?: number;
}
export declare class FD {
    private bin;
    private width;
    private height;
    private host;
    private port;
    private env;
    private shell;
    private log;
    private client;
    private socketAvailable;
    private socketConnected;
    private waiting;
    private mock;
    constructor(bin: string, width: number, height: number, host: string, port: number, display?: string, mock?: boolean);
    private startDisplay;
    private startClient;
    private logstd;
    private logsterr;
    private send;
    private receive;
    load(image: string, x: number, y: number, w: number, h: number): Promise<fdResult>;
    display(image: string, exposure?: number[]): Promise<fdResult>;
    stop(image: string): Promise<fdResult>;
    isConnected(): boolean;
    private test;
    exit(): Promise<void>;
}
export type { Action, Mode, fdOutgoingPosition, fdOutgoingMessage, fdIncomingMessage, fdResult };