import type * as unifont from 'unifont';
import type { CssProperties, Storage } from './definitions.js';
import type { FontType, GenericFallbackName, ResolvedFontFamily } from './types.js';
/**
 * Turns unifont font face data into generic CSS properties, to be consumed by the CSS renderer.
 */
export declare function unifontFontFaceDataToProperties(font: Partial<unifont.FontFaceData>): CssProperties;
export declare function renderFontWeight(weight: unifont.FontFaceData['weight']): string | undefined;
/**
 * Turns unifont font face data src into a valid CSS property.
 * Adapted from https://github.com/nuxt/fonts/blob/main/src/css/render.ts#L68-L81
 */
export declare function renderFontSrc(sources: Exclude<unifont.FontFaceData['src'][number], string>[]): string;
/**
 * Removes the quotes from a string. Used for family names
 */
export declare function withoutQuotes(str: string): string;
export declare function isFontType(str: string): str is FontType;
export declare function cache(storage: Storage, key: string, cb: () => Promise<Buffer>): Promise<Buffer>;
export declare function isGenericFontFamily(str: string): str is GenericFallbackName;
export declare function dedupe<const T extends Array<any>>(arr: T): T;
export declare function sortObjectByKey<T extends Record<string, any>>(unordered: T): T;
export declare function resolveEntrypoint(root: URL, entrypoint: string): URL;
export declare function pickFontFaceProperty<T extends keyof Pick<unifont.FontFaceData, 'display' | 'unicodeRange' | 'stretch' | 'featureSettings' | 'variationSettings'>>(property: T, { data, family }: {
    data: unifont.FontFaceData;
    family: ResolvedFontFamily;
}): import("./types.js").ResolvedRemoteFontFamily[T] | NonNullable<unifont.FontFaceData[T]> | undefined;