import type { FrameState } from 'ol/Map.js';
import Layer from 'ol/layer/Layer.js';
/**
 * A layer to display a simple mask with a cut-out box in the middle.
 */
declare class SimpleMaskLayer extends Layer {
    protected readonly context: CanvasRenderingContext2D;
    protected size: [number, number] | null;
    private readonly fillColor;
    constructor(options?: {}, color?: string);
    /**
     * Updates the box size (width, height), in pixel, of the mask.
     */
    updateSize(size: [number, number]): void;
    /**
     * Draw the mask.
     */
    render(frameState: FrameState): HTMLCanvasElement;
    /**
     * Draws a mask with a cut-out box shape on the map canvas context.
     *
     * @param {number} canvasWidth - The width of the canvas.
     * @param {number} canvasHeight - The height of the canvas.
     * @param {[number, number]} box_ul - The [x, y] coordinates of the upper-left corner of the cut-out box.
     * @param {[number, number]} box_ur - The [x, y] coordinates of the upper-right corner of the cut-out box.
     * @param {[number, number]} box_lr - The [x, y] coordinates of the lower-right corner of the cut-out box.
     * @param {[number, number]} box_ll - The [x, y] coordinates of the lower-left corner of the cut-out box.
     */
    drawBoxMask(canvasWidth: number, canvasHeight: number, box_ul: [number, number], box_ur: [number, number], box_lr: [number, number], box_ll: [number, number]): void;
    private static calculateBoxCorners;
}
export default SimpleMaskLayer;