import type { HSLAdjustment } from "../../miscellaneous/generic-plane/shared";
import { UIBlendMode } from "../../miscellaneous/UIBlendMode";
import type { UIMicroConfig } from "../../miscellaneous/micro/UIMicro.Internal";
import { UITransparencyMode } from "../../miscellaneous/UITransparencyMode";
import type { UIDummyOptions } from "../UIDummy/UIDummy.Internal";
/** Configuration options for UIElement */
export interface UIElementOptions extends UIDummyOptions {
    /** Transforms that don't affect constraints */
    micro: Partial<UIMicroConfig>;
    /** Alpha blending mode */
    transparencyMode: UITransparencyMode;
    /** Color blending mode (only affects BLEND transparency) */
    blendMode: UIBlendMode;
    /** Hue shift in degrees */
    hue: number;
    /** Saturation multiplier (1 = unchanged, 0 = grayscale) */
    saturation: number;
    /** Lightness offset (0 = unchanged) */
    lightness: number;
}
export declare const ELEMENT_DEFAULT_TRANSPARENCY_MODE = UITransparencyMode.BLEND;
export declare const ELEMENT_DEFAULT_BLEND_MODE = UIBlendMode.NORMAL;
export declare const ELEMENT_DEFAULT_HUE = 0;
export declare const ELEMENT_DEFAULT_SATURATION = 1;
export declare const ELEMENT_DEFAULT_LIGHTNESS = 0;
/** Maps a blend mode to the output-alpha multiplier used by the premultiplied shader. */
export declare function blendModeToFactor(mode: UIBlendMode): number;
/**
 * Packs HSL adjustment into the shader attribute layout (hue in turns, saturation
 * multiplier, lightness offset). Hue degrees become turns so the shader can wrap
 * them with a cheap fract().
 */
export declare function packHSL(target: HSLAdjustment, hue: number, saturation: number, lightness: number): HSLAdjustment;