import { LibSANE, SANEOptionDescriptor, SANEStatus } from ".";
export interface ScanOption<T = any> {
    index: number;
    descriptor: SANEOptionDescriptor;
    value: T;
}
export interface IScanOptions extends Iterable<ScanOption> {
    /**
     * List of all SANE options.
     */
    readonly options: ReadonlyArray<ScanOption>;
    /**
     * Well-known SANE option index zero (total number of options).
     *
     * @see {@link https://sane-project.gitlab.io/standard/1.06/api.html#well-known-options}
     */
    readonly zero: ScanOption<number>;
    /**
     * Well-known SANE option `resolution`.
     *
     * @see {@link https://sane-project.gitlab.io/standard/1.06/api.html#well-known-options}
     */
    readonly resolution: ScanOption<number> | null;
    /**
     * Well-known SANE option `preview`.
     *
     * @see {@link https://sane-project.gitlab.io/standard/1.06/api.html#well-known-options}
     */
    readonly preview: ScanOption<boolean> | null;
    /**
     * Well-known SANE option `tl-x`.
     *
     * @see {@link https://sane-project.gitlab.io/standard/1.06/api.html#well-known-options}
     */
    readonly tlX: ScanOption<number> | null;
    /**
     * Well-known SANE option `tl-y`.
     *
     * @see {@link https://sane-project.gitlab.io/standard/1.06/api.html#well-known-options}
     */
    readonly tlY: ScanOption<number> | null;
    /**
     * Well-known SANE option `br-x`.
     *
     * @see {@link https://sane-project.gitlab.io/standard/1.06/api.html#well-known-options}
     */
    readonly brX: ScanOption<number> | null;
    /**
     * Well-known SANE option `br-y`.
     *
     * @see {@link https://sane-project.gitlab.io/standard/1.06/api.html#well-known-options}
     */
    readonly brY: ScanOption<number> | null;
}
/**
 * @private
 */
export declare abstract class ScanOptionsBase implements IScanOptions {
    protected _lib: LibSANE;
    readonly options: ReadonlyArray<ScanOption>;
    readonly zero: ScanOption<number>;
    readonly resolution: ScanOption<number> | null;
    readonly preview: ScanOption<boolean> | null;
    readonly tlX: ScanOption<number> | null;
    readonly tlY: ScanOption<number> | null;
    readonly brX: ScanOption<number> | null;
    readonly brY: ScanOption<number> | null;
    [Symbol.iterator](): IterableIterator<ScanOption>;
    protected static _getOpts(lib: LibSANE): Promise<ScanOption<any>[]>;
    protected constructor(lib: LibSANE, opts: Array<ScanOption>);
    protected _setOpts(this: {
        -readonly [K in keyof ScanOptionsBase]: ScanOptionsBase[K];
    }, opts: Array<ScanOption>): void;
    protected _setValue(index: number, value: any): Promise<{
        status: SANEStatus.UNSUPPORTED | SANEStatus.CANCELLED | SANEStatus.DEVICE_BUSY | SANEStatus.INVAL | SANEStatus.EOF | SANEStatus.JAMMED | SANEStatus.NO_DOCS | SANEStatus.COVER_OPEN | SANEStatus.IO_ERROR | SANEStatus.NO_MEM | SANEStatus.ACCESS_DENIED;
        info: null;
        opts: null;
    } | {
        status: SANEStatus.GOOD;
        info: import(".").SANEInfo;
        opts: ScanOption<any>[];
    }>;
    /**
     * Get class instance (with all scanning options).
     */
    static get: (lib: LibSANE) => Promise<IScanOptions>;
    /**
     * Set option value. Use `null` as `value` for automatic.
     *
     * @see {@link https://sane-project.gitlab.io/standard/1.06/api.html#sane-control-option}
     */
    abstract setValue(index: number, value: any): any;
}
/**
 * Helper class for getting/setting scan options.
 *
 * Any changes (i.e. calls to {@link ScanOptionsMutable.setValue}) affect the
 * internal state.
 */
export declare class ScanOptionsMutable extends ScanOptionsBase {
    static get(lib: LibSANE): Promise<ScanOptionsMutable>;
    setValue(index: number, value: any): Promise<{
        status: SANEStatus.GOOD;
        info: import(".").SANEInfo;
    } | {
        status: SANEStatus.UNSUPPORTED | SANEStatus.CANCELLED | SANEStatus.DEVICE_BUSY | SANEStatus.INVAL | SANEStatus.EOF | SANEStatus.JAMMED | SANEStatus.NO_DOCS | SANEStatus.COVER_OPEN | SANEStatus.IO_ERROR | SANEStatus.NO_MEM | SANEStatus.ACCESS_DENIED;
        info: null;
    }>;
}
/**
 * Helper class for getting/setting scan options.
 *
 * Any changes (i.e. calls to {@link ScanOptions.setValue}) return a
 * new class instance.
 */
export declare class ScanOptions extends ScanOptionsBase {
    static get(lib: LibSANE): Promise<ScanOptions>;
    setValue(index: number, value: any): Promise<{
        status: SANEStatus.GOOD;
        info: import(".").SANEInfo;
        updated: ScanOptions;
    } | {
        status: SANEStatus.UNSUPPORTED | SANEStatus.CANCELLED | SANEStatus.DEVICE_BUSY | SANEStatus.INVAL | SANEStatus.EOF | SANEStatus.JAMMED | SANEStatus.NO_DOCS | SANEStatus.COVER_OPEN | SANEStatus.IO_ERROR | SANEStatus.NO_MEM | SANEStatus.ACCESS_DENIED;
        info: null;
        updated: null;
    }>;
}