import { RoutingGrid, IRoutingObstacle } from '../shared/routing_grid.js';
import { IRoutePath } from '../../pcb/pcb_interfaces.js';
import { ISteinerPoint } from '../router/steiner_optimizer.js';
/**
 * Generates debug visualizations of routing grids and paths.
 * Creates simple PPM (Portable PixMap) images that can be viewed with most image viewers.
 */
export declare class DebugVisualizer {
    /**
     * Generate a debug visualization of the routing grid with obstacles and paths.
     *
     * @param grid - The routing grid
     * @param obstacles - Array of obstacles
     * @param paths - Array of routed paths
     * @param filename - Output filename (without extension)
     * @param layer - Which layer to visualize (default: first layer in grid)
     * @param cellSize - Pixels per grid cell (default: 1, max 2 for large grids)
     * @param steinerPoints - Optional Steiner points to highlight
     *
     * @example
     * ```ts
     * DebugVisualizer.visualizeRouting(grid, obstacles, [path], 'debug_route', 'F.Cu', 1);
     * ```
     */
    static visualizeRouting(grid: RoutingGrid, obstacles: IRoutingObstacle[], paths: IRoutePath[], filename?: string, layer?: string, cellSize?: number, steinerPoints?: ISteinerPoint[], debug?: boolean): void;
    /**
     * Get color for obstacle based on net ownership.
     * @private
     */
    private static getObstacleColor;
    /**
     * Get color for obstacle based on type.
     * @private
     */
    private static getObstacleTypeColor;
    /**
     * Fill a rectangle with a color.
     * @private
     */
    private static fillRect;
    /**
     * Draw a rectangle outline.
     * @private
     */
    private static drawRect;
    /**
     * Fill a circle with a color.
     * @private
     */
    private static fillCircle;
    /**
     * Draw a line using Bresenham's algorithm.
     * @private
     */
    private static drawLine;
    /**
     * Set a single pixel in the flat Uint8Array.
     * @private
     */
    private static setPixel;
    /**
     * Save image as PPM (Portable PixMap) format.
     * This is a simple text-based format that requires no dependencies.
     * Uses binary PPM (P6) for smaller file sizes.
     * @private
     */
    private static savePPM;
    /**
     * Visualize multiple layers side by side.
     *
     * @param grid - The routing grid
     * @param obstacles - Array of obstacles
     * @param paths - Array of routed paths
     * @param filename - Output filename (without extension)
     * @param cellSize - Pixels per grid cell (default: 2)
     */
    static visualizeAllLayers(grid: RoutingGrid, obstacles: IRoutingObstacle[], paths: IRoutePath[], filename?: string, cellSize?: number, steinerPoints?: ISteinerPoint[], debug?: boolean): void;
}
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