declare const DEFAULT_SCREEN_WIDTH = 150;
declare const DEFAULT_SCREEN_HEIGHT = 40;
declare const DEFAULT_CHAR_WIDTH = 14;
declare const DEFAULT_CHAR_HEIGHT = 12;
declare const DEFAULT_CHARACTERS = " .:-=+*#%@&$0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
declare const DEFAULT_FADE_DECAY = 0.005;
declare const DEFAULT_RELIGHT_COUNT = 3;
declare const DEFAULT_RELIGHT_THRESHOLD = 0.6;
declare const DEFAULT_FRAME_INTERVAL = 20;
type AsciiCoord = readonly [y: number, x: number];
type AsciiCell = {
    char: string;
    level: number;
};
type AsciiScreen = {
    cells: AsciiCell[][];
    coords: AsciiCoord[];
};
type CreateAsciiScreenOptions = {
    text: string;
    screenWidth?: number;
    screenHeight?: number;
    charWidth?: number;
    charHeight?: number;
    initialLevel?: number;
    initialCharacter?: string;
};
type TickAsciiScreenOptions = {
    fadeDecay?: number;
    frameInterval?: number;
    relightCount?: number;
    relightThreshold?: number;
    characters?: string;
    random?: () => number;
};
declare const normalizeAsciiText: (value: string, maxLength?: number) => string;
declare const fadeToColor: (level: number) => string;
declare const cloneAsciiScreen: (screen: AsciiScreen) => AsciiScreen;
declare const createAsciiScreen: ({ text, screenWidth, screenHeight, charWidth, charHeight, initialLevel, initialCharacter, }: CreateAsciiScreenOptions) => AsciiScreen;
declare const tickAsciiScreen: (screen: AsciiScreen, delta: number, { fadeDecay, frameInterval, relightCount, relightThreshold, characters, random, }?: TickAsciiScreenOptions) => void;
export { DEFAULT_CHAR_HEIGHT, DEFAULT_CHAR_WIDTH, DEFAULT_CHARACTERS, DEFAULT_FADE_DECAY, DEFAULT_FRAME_INTERVAL, DEFAULT_RELIGHT_COUNT, DEFAULT_RELIGHT_THRESHOLD, DEFAULT_SCREEN_HEIGHT, DEFAULT_SCREEN_WIDTH, cloneAsciiScreen, createAsciiScreen, fadeToColor, normalizeAsciiText, tickAsciiScreen, };
export type { AsciiScreen };