/**
 * AnnotationImageManager - Based on PDF.js ImageManager
 *
 * Manages images used by annotation editors with memory optimization.
 * Features:
 * - Caching with reference counting
 * - Memory management (converts to blob when not in use)
 * - Multiple image sources: File, URL, Blob, Canvas
 * - SVG support with aspect ratio preservation
 * - Unique ID generation and validation
 */
export interface ImageData {
    bitmap: ImageBitmap | HTMLImageElement;
    id: string;
    refCounter: number;
    isSvg: boolean;
    url?: string;
    file?: File;
    blobPromise?: Promise<Blob>;
    svgUrl?: string;
}
export interface ImageManagerOptions {
    baseId?: string;
}
/**
 * Utility function to generate unique IDs
 */
declare function generateUuid(): string;
/**
 * Utility function to fetch data from URL
 */
declare function fetchImageData(url: string): Promise<Blob>;
declare function validateFileSize(file: File, maxSize?: number): boolean;
declare function validateFileMimeType(file: File, mimeTypes?: string[]): boolean;
declare function isSVGFittingCanvas(): Promise<boolean>;
export declare class AnnotationImageManager {
    private readonly baseId;
    private idCounter;
    private cache;
    constructor(options?: ImageManagerOptions);
    /**
     * Get image data from cache or create new entry
     */
    private get;
    /**
     * Handle SVG image loading with aspect ratio preservation
     */
    private handleSvgImage;
    /**
     * Get image from File object
     */
    getFromFile(file: File): Promise<ImageData | null>;
    /**
     * Get image from URL
     */
    getFromUrl(url: string): Promise<ImageData | null>;
    /**
     * Get image from Blob with custom ID
     */
    getFromBlob(id: string, blobPromise: Promise<Blob>): Promise<ImageData | null>;
    /**
     * Get image by ID (restore from cache)
     */
    getFromId(id: string): Promise<ImageData | null>;
    /**
     * Get image from Canvas element
     */
    getFromCanvas(id: string, canvas: HTMLCanvasElement): ImageData;
    /**
     * Get SVG URL by ID
     */
    getSvgUrl(id: string): string | null;
    /**
     * Delete image by ID (decrement reference counter)
     */
    deleteId(id: string): void;
    /**
     * Check if ID belongs to this manager
     */
    isValidId(id: string): boolean;
    /**
     * Get all cached image IDs
     */
    getCachedIds(): string[];
    /**
     * Get cache statistics
     */
    getCacheStats(): {
        totalImages: number;
        loadedImages: number;
        totalMemory: number;
    };
    /**
     * Clear all cached images
     */
    clear(): void;
    /**
     * Convert ImageBitmap to data URL (for export/clipboard)
     */
    bitmapToDataUrl(imageData: ImageData): Promise<string>;
    /**
     * Create ImageBitmap from existing ImageData for serialization
     */
    serializeBitmap(imageData: ImageData, options?: {
        width?: number;
        height?: number;
        preserveAspectRatio?: boolean;
    }): Promise<ImageBitmap>;
}
export declare const annotationImageManager: AnnotationImageManager;
export { generateUuid, fetchImageData, isSVGFittingCanvas, validateFileSize, validateFileMimeType };