import { type PointShapeType } from '../../../shape/type.js';
/**
 * Draws a geometric symbol (circle, square, triangle, or diamond) on a canvas context.
 *
 * @param ctx - The CanvasRenderingContext2D to draw on.
 * @param cx - The x-coordinate of the center of the symbol.
 * @param cy - The y-coordinate of the center of the symbol.
 * @param radius - The radius (or half-size) of the symbol.
 * @param shape - The shape to draw. One of 'circle', 'square', 'triangle', or 'diamond'.
 *
 * @remarks
 * - For circles, the radius is the actual radius.
 * - For squares, the radius is half the side length.
 * - For triangles and diamonds, the radius controls the overall size.
 */
export declare function drawSymbol(ctx: CanvasRenderingContext2D, cx: number, cy: number, radius: number, shape?: PointShapeType): void;