/**
 * CSS Filter / Effect
 */
export interface FilterObject {
    name: string;
    params: string;
}
export type Effect = BrightnessEffect | DropShadowEffect | BlurEffect | NoiseEffect | FXAA;
export interface BrightnessEffect {
    type: 'brightness';
    value: number;
}
export interface DropShadowEffect {
    type: 'drop-shadow';
    x: number;
    y: number;
    blur: number;
    spread: number;
    color: string;
}
export interface BlurEffect {
    type: 'blur';
    value: number;
}
export interface NoiseEffect {
    type: 'noise';
    value: number;
}
export interface FXAA {
    type: 'fxaa';
}
/**
 * 从 CSS filter 字符串中解析出一个或多个 filter 对象
 *
 * @example
 * parseEffect('blur(5px)')
 * // => [{ name: 'blur', value: 5 }]
 *
 * @example
 * parseEffect('drop-shadow(3px 3px red) sepia(100%)')
 * // => [{ name: 'drop-shadow', x: 3, y: 3, blur: 0, spread: 0, color: 'red' }, { name: 'sepia', value: 100 }]
 *
 * @example
 * parseEffect('blur(5px) brightness(0.4) drop-shadow(16px 16px 20px blue)')
 * // => [
 * //   { name: 'blur', value: 5 },
 * //   { name: 'brightness', value: 0.4 },
 * //   { name: 'drop-shadow', x: 16, y: 16, blur: 20, spread: 0, color: 'blue' }
 * // ]
 */
export declare function parseEffect(filter: string): Effect[];