import { type GeoJsonPosition } from "@trackunit/geo-json-utils";
import type { ResolvedDecoration } from "../shapeDecorations";
/**
 * Reserved pixel space at each end of an edge, computed from decorations
 * that sit on the edge's start or end vertex.
 */
export type EdgeReservation = Readonly<{
    /** Total pixel length of the edge. */
    totalPx: number;
    /** Available length after subtracting vertex decoration reservations from both ends. */
    safePx: number;
    /** Pixel inset from the start vertex (left end when the edge reads left-to-right). */
    startInsetPx: number;
    /** Pixel inset from the end vertex (right end when the edge reads left-to-right). */
    endInsetPx: number;
}>;
/**
 * Compute edge reservations for a list of edges given the resolved
 * decorations for the same feature.
 *
 * For each edge `[startVertex, endVertex]`, the start inset is the maximum
 * `radiusPx` of any decoration at the start vertex, and the end inset is the
 * maximum `radiusPx` of any decoration at the end vertex. The safe length
 * is `totalPx - startInset - endInset`, clamped to zero.
 *
 * @param edges - Consecutive vertex pairs forming edges (as returned by `extractEdges`).
 * @param decorations - Resolved decorations for the same feature.
 * @param zoom - Current map zoom level.
 * @param tileSize - Tile size (256 for Google, 512 for Mapbox).
 */
export declare const computeEdgeReservations: (edges: ReadonlyArray<readonly [GeoJsonPosition, GeoJsonPosition]>, decorations: ReadonlyArray<ResolvedDecoration>, zoom: number, tileSize: number) => ReadonlyArray<EdgeReservation>;
/**
 * Look up the reservation for a specific edge. Returns a default reservation
 * with zero insets if the edge index is out of range.
 */
export declare const getEdgeReservation: (reservations: ReadonlyArray<EdgeReservation>, edgeIndex: number) => EdgeReservation;