import type { Composition } from '../player/Composition';
import type { FilterDefine, FilterShaderDefine } from '../render/filter';
import type { Renderer } from '@predy-js/render-interface';
export interface GaussianFilterParams {
    radius: number;
}
export declare function gaussianFilter(opt: {
    radius: number;
    maxStep?: number;
}): {
    shader: string;
    step: number;
    downSample: number;
    radius: number;
};
export declare const GAUSSIAN_SEMANTIC_DIRECTION = "GAUSSIAN_DIR";
export declare const GAUSSIAN_SOURCE = "GAUSSIAN_SOURCE";
export declare function precompileGaussianFilter(renderer: Renderer, filter: GaussianFilterParams): FilterShaderDefine[];
export declare function registerGaussianFilter(comp: Composition, filter: GaussianFilterParams): FilterDefine;
declare const _default: (typeof registerGaussianFilter | typeof precompileGaussianFilter)[];
export default _default;