import { IFontFace, IKeyframes } from '@uifabric/merge-styles';
export declare type FontFace = IFontFace;
export declare type KeyFrames = IKeyframes;
export declare type StyleRendererOptions = {
    rtl?: boolean;
    targetWindow: Window | undefined;
};
export interface StyleRenderer {
    /**
     * Expected to initialize or re-initialize the renderer. Primarily for testing purposes.
     */
    reset: () => void;
    /**
     * Returns a unique id for the renderer; used as part of the cache key when determining if new
     * styles need to be rendered.
     */
    getId: () => number;
    /**
     * Renders a stylesheet and returns the map of key to class name.
     */
    renderStyles: <TRuleSet>(ruleSet: TRuleSet, options: StyleRendererOptions) => {
        [key in keyof TRuleSet]: string;
    };
    /**
     * Renders keyframes and returns the keyframe name.
     */
    renderKeyframes: (keyframes: KeyFrames, options: StyleRendererOptions) => string;
    /**
     * Renders fontfaces.
     */
    renderFontFace: (fontFace: FontFace, options: StyleRendererOptions) => void;
}