import type { Manga, ViewerSettings, ViewerState } from "./types";
export declare const PRELOAD_PAGE_COUNT = 1;
export declare const PRELOAD_IMAGE_COUNT = 4;
export declare const defaultSettings: ViewerSettings;
export declare function createInitialState(manga: Manga, settings: ViewerSettings, pageIndex?: number): ViewerState;
export declare function mergeSettings(base: ViewerSettings, updates?: Partial<ViewerSettings>): ViewerSettings;
export declare function clampZoom(scale: number, zoom: ViewerSettings["zoom"]): number;
export declare function clampPageIndex(pageIndex: number, pageCount: number): number;
export declare function getPageStep(settings: ViewerSettings, pageIndex: number): number;
export declare function calculateVisiblePageIndexes(currentPageIndex: number, pageCount: number, settings: ViewerSettings): number[];
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