import type { Slide } from '../types/slides';
export declare const PREVIEW_BITMAP_MAX_EDGE = 512;
export declare const PREVIEW_BITMAP_CACHE_MAX = 640;
export declare const FULL_BITMAP_CACHE_MAX = 64;
export type LoadImageBitmapOptions = {
    maxEdge?: number;
};
export declare const subscribePreviewBitmaps: (fn: (src: string) => void) => () => void;
export declare const getCachedImageBitmap: (src: string, options?: LoadImageBitmapOptions) => ImageBitmap | undefined;
export declare const previewPaintHasMedia: (painted: Set<string> | undefined, srcs: readonly string[]) => boolean;
export declare const loadImageBitmap: (src: string, options?: LoadImageBitmapOptions) => Promise<ImageBitmap | null>;
export declare const loadPreviewImageBitmap: (src: string) => Promise<ImageBitmap>;
export declare const getCachedPreviewImageBitmap: (src: string) => ImageBitmap;
export declare const collectSlidePreviewSrcs: (slide: Slide) => string[];
export declare const collectSlideImageSrcs: (slides: readonly Slide[]) => string[];
export declare const prefetchPreviewImageBitmaps: (srcs: readonly string[]) => void;
export declare const revokeImageBitmapsNotIn: (keep: Iterable<string>) => void;
export declare const syncImageBitmapsToSlides: (slides: readonly Slide[]) => void;