/// <reference types="deck.gl" />
import { Layer, LayerExtension } from '@deck.gl/core';
export declare type FilterArrowExtensionProps = {
    getFiltered?: () => number;
};
/**
 * FilterArrowExtension - a deck.gl extension to filter arrow layer
 *
 * A simple extension to filter arrow layer based on the result of CPU filteredIndex,
 * so we can avoid filtering on the raw Arrow table and recreating geometry attributes.
 * Specifically, an attribute `filtered` is added to the layer to indicate whether the feature has been Filtered
 * the shader module is modified to discard the feature if filtered value is 0
 * the accessor getFiltered is used to get the value of `filtered` based on the value `filteredIndex` in Arrowlayer
 */
export default class FilterArrowExtension extends LayerExtension {
    static defaultProps: {
        getFiltered: {
            type: string;
            value: number;
        };
    };
    static extensionName: string;
    getShaders(): {
        modules: {
            name: string;
            dependencies: {
                name: string;
                dependencies: any[];
                vs: string;
                getUniforms: (opts?: {} | undefined) => any;
            }[];
            vs: string;
            fs: string;
            inject: {
                'vs:#main-start': string;
            };
            getUniforms: () => void;
        }[];
        defines: {};
    };
    initializeState(this: Layer<FilterArrowExtensionProps>): void;
}