import { type FilterName, type FilterSetting } from './filters.js';
import type { Options, ParseOptions } from './types.js';
export declare const DEFAULT_DATA_ATTRIBUTE = "filter";
/** 🖼 A CSS & Canvas Instagram filters based on CSSgram */
export declare class CCgram {
    static readonly DEFAULT_DATA_ATTRIBUTE = "filter";
    static readonly DEFAULT_FILTERS: Map<string, FilterSetting>;
    /** filter list */
    protected readonly _filters: Map<FilterName, FilterSetting>;
    /** data attribute */
    protected _dataAttribute: string;
    /** data attribute key in camelCase for dataset access */
    protected _dataAttributeKey: string;
    /** Initialize CSS filter to all targets */
    constructor({ dataAttribute, init, }?: Options);
    /** The filter name list */
    get filterNames(): FilterName[];
    /**
     * Add/Set filter
     * @param name - the Filter name
     * @param setting - the Filter setting
     */
    setFilter(name: FilterName, setting: FilterSetting): void;
    /**
     * Remove filter
     * @param name - the Filter name
     */
    removeFilter(name: FilterName): boolean;
    /**
     * Get setting object of filter
     * @param [name=''] - The filter name
     */
    getFilterSetting(name?: FilterName): FilterSetting | void;
    /**
     * Get the CSS inline style string of filter
     * @param [name=''] - The filter name
     */
    getFilterStyle(name?: FilterName): string;
    /**
     * Apply CSS filter to all targets
     * @param [selectors='img[data-${this._dataAttribute}]'] - selectors
     */
    applyFilter(selectors?: string): void;
    /**
     * Get the data URL of image element
     * @param image - image element
     * @param [options] - options
     */
    getDataURL(image: HTMLImageElement, options?: ParseOptions): Promise<string | null>;
    /**
     * Get the blob of image element
     * @param image - image element
     * @param [options={}] - parse options
     */
    getBlob(image: HTMLImageElement, options?: ParseOptions): Promise<Blob | null>;
}
/** old Name, alias for `CCgram` */
export declare const CCGram: typeof CCgram;
/** alias for `CCgram` */
export declare const Filter: typeof CCgram;
export type FilterInstance = InstanceType<typeof CCgram>;
export declare function createFilter(options?: Options): FilterInstance;