/**
 * Utility functions for exporting SVG element as PNG blob, data URL, and file downloads
 */
import type { PNGExportOptions } from '../fretboard/types';
/**
 * Converts an SVG element into a PNG Blob using native HTML5 Canvas
 *
 * @param svgElement - The SVG element to rasterize
 * @param options - Scaling and quality options
 * @returns Promise resolving to PNG Blob
 */
export declare function exportSvgToPngBlob(svgElement: SVGSVGElement, options?: PNGExportOptions): Promise<Blob>;
/**
 * Converts an SVG element into a PNG Data URL string
 */
export declare function exportSvgToPngDataUrl(svgElement: SVGSVGElement, options?: PNGExportOptions): Promise<string>;
/**
 * Triggers a browser file download for a PNG Blob
 */
export declare function triggerPngDownload(blob: Blob, filename?: string): void;
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