import { Group } from './group';
import { CanvasFactory } from './types';
/**
 * Scene with named layers on a single canvas: each layer is a root group,
 * layer order = order of first access (z-order). The scene graph is retained,
 * so any change simply redraws the whole canvas once per frame.
 */
export declare class Scene {
    private logicalWidth;
    private logicalHeight;
    private readonly canvas;
    private readonly layers;
    private dirty;
    constructor(factory: CanvasFactory, logicalWidth: number, logicalHeight: number);
    get width(): number;
    get height(): number;
    /** Root group of the layer; created on first access. */
    layer(name: string): Group;
    /** Marks the scene for redraw (layer names are accepted for call-site clarity; the canvas is redrawn whole). */
    markDirty(..._names: string[]): void;
    measureText(text: string, font: string): number;
    resize(width: number, height: number): void;
    /** Redraws the canvas if anything changed since the last render. */
    render(): void;
    /** Rendered image source (PNG export). */
    composite(draw: (image: unknown) => void): void;
    destroy(): void;
}