import { Compositor } from '../core';
export declare const ForegroundLayers: ({
    name: string;
    id: string;
    layout: string;
    layoutProps: {
        type: string;
        cover?: undefined;
        preset?: undefined;
    };
} | {
    name: string;
    id: string;
    layout: string;
    layoutProps: {
        cover: boolean;
        type?: undefined;
        preset?: undefined;
    };
} | {
    name: string;
    id: string;
    layout: string;
    layoutProps?: undefined;
} | {
    name: string;
    id: string;
    layout: string;
    layoutProps: {
        type: string;
        preset: string;
        cover?: undefined;
    };
})[];
export declare const defaultStyles: {
    custom: {
        display: string;
    };
    alert: {
        display: string;
        position: string;
        top: number;
        left: number;
        bottom: number;
        right: number;
        margin: string;
        pointerEvents: string;
    };
    video: {
        height: string;
        width: string;
    };
    image: {
        height: string;
        width: string;
    };
    logo: {
        objectFit: string;
        position: string;
    };
};
export declare const validateEachChildren: (children: Compositor.SceneNode[], allowedSourceTypes: string[]) => boolean;