import { MetalFxInstance } from '../renderer/core';
export declare const RANGE_PX = 12;
export declare const ATTACH_RANGE_PX = 32;
export declare const OVERLAP_MIN_PX = 1;
export declare const BASE_ALPHA = 0.55;
export declare const BOOST_ALPHA = 1;
export declare const GRAD_NEAR = 1;
export declare const GRAD_MID = 0.85;
export declare const GRAD_FAR = 0;
export declare const INTENSITY_MULT = 1.3;
export declare const MAX_ALPHA_STACK = 3.6;
export declare const GLOBAL_ATTENUATION = 0.7;
export declare const STROKE_CSS_PX = 1;
export declare const STROKE_EXTRA_ALPHA = 0.52;
export declare const BORDER_HILITE_PX = 1;
export declare const BORDER_HILITE_ALPHA = 0.044;
export declare const REF_DRAW_CSS_W = 235;
export declare const FILL_EXTRA_ALPHA = 2.535;
export declare const FILL_OPACITY_MUL = 0.7;
export declare const FILL_CIRCLE_ATTENUATION = 0.5;
export declare const REFLECTION_BLOCKED_TAGS: Set<string>;
export interface ReflectionTarget {
    el: HTMLElement;
    anchor: MetalFxInstance;
    anchorEl: HTMLElement;
    /** Per-target alpha multiplier from the public API. 1 = canonical. */
    strength: number;
    wrap: HTMLDivElement;
    canvas: HTMLCanvasElement;
    ctx: CanvasRenderingContext2D;
    strokeCanvas: HTMLCanvasElement;
    strokeCtx: CanvasRenderingContext2D;
    cornerRadius: number;
    hairlineWidth: number;
    hairlineOuterCssPx: number;
    appliedPositionRelative: boolean;
    appliedIsolation: boolean;
    resizeObserver: ResizeObserver | null;
    mutationObserver: MutationObserver | null;
    /** Glyph-target canvas styling applied (see paint). */
    glyphStyled?: boolean;
}