/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2018 Photon Storm Ltd.
 * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
 */
declare var Clamp: any;
declare var _FLAG: number;
/**
 * Provides methods used for setting the alpha properties of a Game Object.
 * Should be applied as a mixin and not used directly.
 *
 * @name Phaser.GameObjects.Components.Alpha
 * @since 3.0.0
 */
declare var Alpha: {
    /**
     * Private internal value. Holds the global alpha value.
     *
     * @name Phaser.GameObjects.Components.Alpha#_alpha
     * @type {number}
     * @private
     * @default 1
     * @since 3.0.0
     */
    _alpha: number;
    /**
     * Private internal value. Holds the top-left alpha value.
     *
     * @name Phaser.GameObjects.Components.Alpha#_alphaTL
     * @type {number}
     * @private
     * @default 1
     * @since 3.0.0
     */
    _alphaTL: number;
    /**
     * Private internal value. Holds the top-right alpha value.
     *
     * @name Phaser.GameObjects.Components.Alpha#_alphaTR
     * @type {number}
     * @private
     * @default 1
     * @since 3.0.0
     */
    _alphaTR: number;
    /**
     * Private internal value. Holds the bottom-left alpha value.
     *
     * @name Phaser.GameObjects.Components.Alpha#_alphaBL
     * @type {number}
     * @private
     * @default 1
     * @since 3.0.0
     */
    _alphaBL: number;
    /**
     * Private internal value. Holds the bottom-right alpha value.
     *
     * @name Phaser.GameObjects.Components.Alpha#_alphaBR
     * @type {number}
     * @private
     * @default 1
     * @since 3.0.0
     */
    _alphaBR: number;
    /**
     * Clears all alpha values associated with this Game Object.
     *
     * Immediately sets the alpha levels back to 1 (fully opaque).
     *
     * @method Phaser.GameObjects.Components.Alpha#clearAlpha
     * @since 3.0.0
     *
     * @return {this} This Game Object instance.
     */
    clearAlpha: () => any;
    /**
     * Set the Alpha level of this Game Object. The alpha controls the opacity of the Game Object as it renders.
     * Alpha values are provided as a float between 0, fully transparent, and 1, fully opaque.
     *
     * If your game is running under WebGL you can optionally specify four different alpha values, each of which
     * correspond to the four corners of the Game Object. Under Canvas only the `topLeft` value given is used.
     *
     * @method Phaser.GameObjects.Components.Alpha#setAlpha
     * @since 3.0.0
     *
     * @param {number} [topLeft=1] - The alpha value used for the top-left of the Game Object. If this is the only value given it's applied across the whole Game Object.
     * @param {number} [topRight] - The alpha value used for the top-right of the Game Object. WebGL only.
     * @param {number} [bottomLeft] - The alpha value used for the bottom-left of the Game Object. WebGL only.
     * @param {number} [bottomRight] - The alpha value used for the bottom-right of the Game Object. WebGL only.
     *
     * @return {this} This Game Object instance.
     */
    setAlpha: (topLeft: any, topRight: any, bottomLeft: any, bottomRight: any) => any;
    /**
     * The alpha value of the Game Object.
     *
     * This is a global value, impacting the entire Game Object, not just a region of it.
     *
     * @name Phaser.GameObjects.Components.Alpha#alpha
     * @type {number}
     * @since 3.0.0
     */
    alpha: {
        get: () => any;
        set: (value: any) => void;
    };
    /**
     * The alpha value starting from the top-left of the Game Object.
     * This value is interpolated from the corner to the center of the Game Object.
     *
     * @name Phaser.GameObjects.Components.Alpha#alphaTopLeft
     * @type {number}
     * @webglOnly
     * @since 3.0.0
     */
    alphaTopLeft: {
        get: () => any;
        set: (value: any) => void;
    };
    /**
     * The alpha value starting from the top-right of the Game Object.
     * This value is interpolated from the corner to the center of the Game Object.
     *
     * @name Phaser.GameObjects.Components.Alpha#alphaTopRight
     * @type {number}
     * @webglOnly
     * @since 3.0.0
     */
    alphaTopRight: {
        get: () => any;
        set: (value: any) => void;
    };
    /**
     * The alpha value starting from the bottom-left of the Game Object.
     * This value is interpolated from the corner to the center of the Game Object.
     *
     * @name Phaser.GameObjects.Components.Alpha#alphaBottomLeft
     * @type {number}
     * @webglOnly
     * @since 3.0.0
     */
    alphaBottomLeft: {
        get: () => any;
        set: (value: any) => void;
    };
    /**
     * The alpha value starting from the bottom-right of the Game Object.
     * This value is interpolated from the corner to the center of the Game Object.
     *
     * @name Phaser.GameObjects.Components.Alpha#alphaBottomRight
     * @type {number}
     * @webglOnly
     * @since 3.0.0
     */
    alphaBottomRight: {
        get: () => any;
        set: (value: any) => void;
    };
};