/**
 * Thumbnail Generation for FCM Files
 *
 * Brother ScanNCut FCM files contain an embedded thumbnail displayed
 * in the machine's UI. Invalid thumbnails can cause reboots when
 * the FCM file is on external media.
 *
 * Thumbnail format:
 * - 88×88 pixels, 1-bit monochrome BMP
 * - 62-byte BMP header + 1056 bytes pixel data = 1118 bytes total
 * - Row stride: 12 bytes (88 bits padded to 4-byte boundary)
 * - BMP is bottom-up (y-flipped)
 * - White = 1 (background), Black = 0 (paths)
 */
import { Path } from "./path.js";
/** Thumbnail dimensions */
export declare const THUMBNAIL_SIZE = 88;
export declare const THUMBNAIL_ROW_BYTES = 12;
export declare const THUMBNAIL_PIXEL_BYTES: number;
export declare const THUMBNAIL_TOTAL_BYTES: number;
/** Bounding box for paths */
export interface Bounds {
    minX: number;
    minY: number;
    maxX: number;
    maxY: number;
}
/**
 * Calculate bounding box from paths
 */
export declare function calculateBounds(paths: Path[]): Bounds | null;
/**
 * Generate a blank white thumbnail
 */
export declare function generateBlankThumbnail(): Uint8Array;
/**
 * Generate thumbnail BMP from paths
 *
 * Renders path outlines as black lines on white background.
 * Paths are scaled to fit within an 80×80 region (4px margin).
 */
export declare function generateThumbnail(paths: Path[]): Uint8Array;
/**
 * Generate thumbnail from explicit bounds and paths
 *
 * Use this when you already know the bounds (e.g., after centering paths)
 */
export declare function generateThumbnailWithBounds(bounds: Bounds, paths: Path[]): Uint8Array;