import type { AnyStructure } from '../structure';
import { type Camera, type Scene, type WebGLRenderer } from 'three';
export declare const renderer_registry: WeakMap<HTMLCanvasElement, WebGLRenderer>;
export declare const dpi_to_scale: (png_dpi: number) => number;
export declare function canvas_to_png_blob(canvas: HTMLCanvasElement, png_dpi?: number, scene?: Scene | null, camera?: Camera | null): Promise<Blob>;
export declare function export_canvas_as_png(canvas: HTMLCanvasElement | null, structure_or_filename: AnyStructure | string | undefined, png_dpi?: number, scene?: Scene | null, camera?: Camera | null): void;
export declare function svg_to_svg_string(svg_element: SVGElement, inline_styles?: readonly string[]): string;
export declare function export_svg_as_svg(svg_element: SVGElement | null, filename: string, inline_styles?: readonly string[]): void;
export declare function svg_to_png_blob(svg_element: SVGElement, png_dpi?: number, inline_styles?: readonly string[]): Promise<Blob>;
export declare function export_svg_as_png(svg_element: SVGElement | null, filename: string, png_dpi?: number, inline_styles?: readonly string[]): void;
export declare function observe_canvas_presence(wrapper: HTMLElement | undefined, set: (has_canvas: boolean) => void): (() => void) | undefined;
export declare const estimate_video_bitrate: (pixel_count: number, fps: number) => number;
export declare function get_ffmpeg_conversion_command(input_filename: string): string;
export declare function export_trajectory_video(canvas: HTMLCanvasElement | null, filename: string, options?: {
    fps?: number;
    total_frames?: number;
    on_progress?: (progress: number) => void;
    on_step?: (step_idx: number) => void | Promise<void>;
    resolution_multiplier?: number;
}): Promise<void>;