import { ImageFieldImage } from "@prismicio/types";
import { BuildPixelDensitySrcSetParams } from "imgix-url-builder";
/**
 * Configuration for `asImagePixelDensitySrcSet()`.
 */
type AsImagePixelDensitySrcSetConfig = Omit<BuildPixelDensitySrcSetParams, "pixelDensities"> & Partial<Pick<BuildPixelDensitySrcSetParams, "pixelDensities">>;
/**
 * The return type of `asImagePixelDensitySrcSet()`.
 */
type AsImagePixelDensitySrcSetReturnType<Field extends ImageFieldImage | null | undefined> = Field extends ImageFieldImage<"filled"> ? {
    /**
     * The Image field's image URL with Imgix URL parameters (if given).
     */
    src: string;
    /**
     * A pixel-densitye-based `srcset` attribute value for the Image field's
     * image with Imgix URL parameters (if given).
     */
    srcset: string;
} : null;
/**
 * Creates a pixel-density-based `srcset` from an Image field with optional
 * image transformations (via Imgix URL parameters).
 *
 * If a `pixelDensities` parameter is not given, the following pixel densities
 * will be used by default: 1, 2, 3.
 *
 * @example
 *
 * ```ts
 * const srcset = asImagePixelDensitySrcSet(document.data.imageField, {
 * 	pixelDensities: [1, 2],
 * 	sat: -100,
 * });
 * // => {
 * //   src:    'https://images.prismic.io/repo/image.png?sat=-100',
 * //   srcset: 'https://images.prismic.io/repo/image.png?sat=-100&dpr=1 1x, ' +
 * //           'https://images.prismic.io/repo/image.png?sat=-100&dpr=2 2x'
 * // }
 * ```
 *
 * @param field - Image field (or one of its responsive views) from which to get
 *   an image URL.
 * @param params - An object of Imgix URL API parameters. The `pixelDensities`
 *   parameter defines the resulting `srcset` widths.
 *
 * @returns A `srcset` attribute value for the Image field with Imgix URL
 *   parameters (if given). If the Image field is empty, `null` is returned.
 * @see Imgix URL parameters reference: https://docs.imgix.com/apis/rendering
 */
export declare const asImagePixelDensitySrcSet: <Field extends import("@prismicio/types").EmptyImageFieldImage | import("@prismicio/types").FilledImageFieldImage | null | undefined>(field: Field, params?: AsImagePixelDensitySrcSetConfig) => AsImagePixelDensitySrcSetReturnType<Field>;
export {};