/** @format */
import { Channel } from '../color/channel.js';
import { Color, ColorConvertOptions } from '../color/color.js';
import { Format } from '../color/format.js';
import { MemoryImageData } from './image-data.js';
import { Palette } from './palette.js';
import { Pixel } from './pixel.js';
/**
 * Represents an invalid pixel.
 */
export declare class PixelUndefined implements Pixel, Iterable<Pixel>, Iterator<Pixel> {
    /**
     * A static readonly property representing null image data.
     */
    private static readonly _nullImageData;
    /**
     * Gets the image data.
     * @returns {MemoryImageData} The image data.
     */
    get image(): MemoryImageData;
    /**
     * Checks if the pixel is valid.
     * @returns {boolean} Always returns false.
     */
    get isValid(): boolean;
    /**
     * Gets the width of the pixel.
     * @returns {number} Always returns 0.
     */
    get width(): number;
    /**
     * Gets the height of the pixel.
     * @returns {number} Always returns 0.
     */
    get height(): number;
    /**
     * Gets the x-coordinate of the pixel.
     * @returns {number} Always returns 0.
     */
    get x(): number;
    /**
     * Gets the y-coordinate of the pixel.
     * @returns {number} Always returns 0.
     */
    get y(): number;
    /**
     * Gets the normalized x-coordinate of the pixel.
     * @returns {number} Always returns 0.
     */
    get xNormalized(): number;
    /**
     * Gets the normalized y-coordinate of the pixel.
     * @returns {number} Always returns 0.
     */
    get yNormalized(): number;
    /**
     * Gets the length of the pixel.
     * @returns {number} Always returns 0.
     */
    get length(): number;
    /**
     * Gets the maximum channel value.
     * @returns {number} Always returns 0.
     */
    get maxChannelValue(): number;
    /**
     * Gets the maximum index value.
     * @returns {number} Always returns 0.
     */
    get maxIndexValue(): number;
    /**
     * Gets the format of the pixel.
     * @returns {Format} Always returns Format.uint8.
     */
    get format(): Format;
    /**
     * Checks if the format is LDR.
     * @returns {boolean} Always returns false.
     */
    get isLdrFormat(): boolean;
    /**
     * Checks if the format is HDR.
     * @returns {boolean} Always returns false.
     */
    get isHdrFormat(): boolean;
    /**
     * Checks if the pixel has a palette.
     * @returns {boolean} Always returns false.
     */
    get hasPalette(): boolean;
    /**
     * Gets the palette of the pixel.
     * @returns {Palette | undefined} Always returns undefined.
     */
    get palette(): Palette | undefined;
    /**
     * Gets the index of the pixel.
     * @returns {number} Always returns 0.
     */
    get index(): number;
    /**
     * Sets the index of the pixel.
     * @param {number} _i - The index to set.
     */
    set index(_i: number);
    /**
     * Gets the red channel value.
     * @returns {number} Always returns 0.
     */
    get r(): number;
    /**
     * Sets the red channel value.
     * @param {number} _r - The red channel value to set.
     */
    set r(_r: number);
    /**
     * Gets the green channel value.
     * @returns {number} Always returns 0.
     */
    get g(): number;
    /**
     * Sets the green channel value.
     * @param {number} _g - The green channel value to set.
     */
    set g(_g: number);
    /**
     * Gets the blue channel value.
     * @returns {number} Always returns 0.
     */
    get b(): number;
    /**
     * Sets the blue channel value.
     * @param {number} _b - The blue channel value to set.
     */
    set b(_b: number);
    /**
     * Gets the alpha channel value.
     * @returns {number} Always returns 0.
     */
    get a(): number;
    /**
     * Sets the alpha channel value.
     * @param {number} _a - The alpha channel value to set.
     */
    set a(_a: number);
    /**
     * Gets the normalized red channel value.
     * @returns {number} Always returns 0.
     */
    get rNormalized(): number;
    /**
     * Sets the normalized red channel value.
     * @param {number} _v - The normalized red channel value to set.
     */
    set rNormalized(_v: number);
    /**
     * Gets the normalized green channel value.
     * @returns {number} Always returns 0.
     */
    get gNormalized(): number;
    /**
     * Sets the normalized green channel value.
     * @param {number} _v - The normalized green channel value to set.
     */
    set gNormalized(_v: number);
    /**
     * Gets the normalized blue channel value.
     * @returns {number} Always returns 0.
     */
    get bNormalized(): number;
    /**
     * Sets the normalized blue channel value.
     * @param {number} _v - The normalized blue channel value to set.
     */
    set bNormalized(_v: number);
    /**
     * Gets the normalized alpha channel value.
     * @returns {number} Always returns 0.
     */
    get aNormalized(): number;
    /**
     * Sets the normalized alpha channel value.
     * @param {number} _v - The normalized alpha channel value to set.
     */
    set aNormalized(_v: number);
    /**
     * Gets the luminance value.
     * @returns {number} Always returns 0.
     */
    get luminance(): number;
    /**
     * Gets the normalized luminance value.
     * @returns {number} Always returns 0.
     */
    get luminanceNormalized(): number;
    /**
     * Gets the value of the specified channel.
     * @param {number} _channel - The channel to get the value of.
     * @returns {number} Always returns 0.
     */
    getChannel(_channel: number): number;
    /**
     * Gets the normalized value of the specified channel.
     * @param {Channel} _channel - The channel to get the normalized value of.
     * @returns {number} Always returns 0.
     */
    getChannelNormalized(_channel: Channel): number;
    /**
     * Sets the value of the specified channel.
     * @param {number} _channel - The channel to set the value of.
     * @param {number} _value - The value to set.
     */
    setChannel(_channel: number, _value: number): void;
    /**
     * Sets the color of the pixel.
     * @param {Color} _color - The color to set.
     */
    set(_color: Color): void;
    /**
     * Sets the RGB values of the pixel.
     * @param {number} _r - The red value to set.
     * @param {number} _g - The green value to set.
     * @param {number} _b - The blue value to set.
     */
    setRgb(_r: number, _g: number, _b: number): void;
    /**
     * Sets the RGBA values of the pixel.
     * @param {number} _r - The red value to set.
     * @param {number} _g - The green value to set.
     * @param {number} _b - The blue value to set.
     * @param {number} _a - The alpha value to set.
     */
    setRgba(_r: number, _g: number, _b: number, _a: number): void;
    /**
     * Clones the pixel.
     * @returns {Color} A new PixelUndefined instance.
     */
    clone(): Color;
    /**
     * Converts the pixel to another format.
     * @param {ColorConvertOptions} _options - The conversion options.
     * @returns {Color} The converted color.
     */
    convert(_options: ColorConvertOptions): Color;
    /**
     * Sets the position of the pixel.
     * @param {number} _x - The x-coordinate to set.
     * @param {number} _y - The y-coordinate to set.
     */
    setPosition(_x: number, _y: number): void;
    /**
     * Sets the normalized position of the pixel.
     * @param {number} _x - The normalized x-coordinate to set.
     * @param {number} _y - The normalized y-coordinate to set.
     */
    setPositionNormalized(_x: number, _y: number): void;
    /**
     * Checks if the pixel is equal to another pixel.
     * @param {Pixel} other - The other pixel to compare.
     * @returns {boolean} True if the other pixel is an instance of PixelUndefined, false otherwise.
     */
    equals(other: Pixel): boolean;
    /**
     * Gets the next iterator result.
     * @returns {IteratorResult<Pixel>} The next iterator result.
     */
    next(): IteratorResult<Pixel>;
    /**
     * Converts the pixel to an array.
     * @returns {number[]} An empty array.
     */
    toArray(): number[];
    /**
     * Converts the pixel to a string.
     * @returns {string} A string representation of the pixel.
     */
    toString(): string;
    /**
     * Gets the iterator for the pixel.
     * @returns {Iterator<Pixel>} The iterator.
     */
    [Symbol.iterator](): Iterator<Pixel>;
}