import { ObjectBase } from "../ObjectBase";
import type { Image } from "../Image";
import { PdfKeyedObjectCollection } from "./PdfKeyedObjectCollection";
/**
 * Defines formats that can be used to encode images in a PDF.
 */
export declare enum PdfImageFormat {
    /**
     * Select the optimal format automatically based on the particular image and document options (recommended).
     * The following rules are used:
     * -) If the image is a JPEG or a JPEG2000, the image data is written as is without any additional processing.
     * -) If the image contains transparency, "Raw" is used.
     * -) If {@link PdfDocument#compressionLevel} is "NoCompression", "Jpeg" is used.
     * -) Otherwise the format is selected that provides the minimal data size for the image.
     */
    Auto = 0,
    /**
     * Use JPEG to encode images.
     *
     * Note that when using this format, any transparency that may be present
     * in an original image will be lost, as JPEG does not support transparency.
     */
    Jpeg = 1,
    /**
     * Do not encode image data.
     *
     * When using this format, the {@link PdfDocument#compressionLevel} affects
     * the final PDF size, and in combination with "Optimal""
     * it may produce better compression than JPEG for certain types of images
     * (e.g. screenshots of mostly text screens).
     */
    Raw = 2
}
/**
 * Represents and manages a {@link Image}
 * used in a {@link PdfDocument}.
 */
export declare class PdfImageHandler extends ObjectBase {
    /**
     * Gets or sets the format used to encode the image associated with this {@link PdfImageHandler}.
     *
     * By default this property is unspecified (null), and the actual embedding mode is determined
     * by {@link PdfDocument#imageOptions}.
     */
    get format(): PdfImageFormat | null;
    /**
     * Gets or sets the format used to encode the image associated with this {@link PdfImageHandler}.
     *
     * By default this property is unspecified (null), and the actual embedding mode is determined
     * by {@link PdfDocument#imageOptions}.
     */
    set format(value: PdfImageFormat | null);
    /**
     * Gets the {@link Image} object managed by this {@link PdfImageHandler} object.
     */
    get image(): Image;
}
/**
 * Represents a collection of {@link PdfImageHandler} objects.
 **/
export declare class PdfImageHandlerCollection extends PdfKeyedObjectCollection<Image, PdfImageHandler> {
    get count(): number;
    getAt(index: number): PdfImageHandler;
    setAt(index: number, item: PdfImageHandler): void;
    insert(index: number, item: PdfImageHandler): void;
    contains(item: PdfImageHandler): boolean;
    remove(item: PdfImageHandler): boolean;
    removeAt(index: number): void;
    clear(): void;
    get(key: Image): PdfImageHandler | undefined;
    containsKey(key: Image): boolean;
    removeByKey(key: Image): boolean;
    /**
     * Gets an existing {@link PdfImageHandler} associated with a specified {@link Image},
     * or creates a new one if such image does not exist.
     *
     * @param image - The image
     * @returns The existing or newly created {@link PdfImageHandler}.
     */
    getImageHandler(image: Image): PdfImageHandler;
}