import { AcCmColor, AcDbDatabase } from '@mlightcad/data-model';
/** Returns the current measurement overlay color from the MEASUREMENTCOLOR system variable. */
export declare function measurementColor(db: AcDbDatabase): AcCmColor;
/** Converts an AcCmColor to a CSS rgba() string. */
export declare function colorToCssAlpha(c: AcCmColor, alpha: number): string;
/** Returns the CSS color string for a measurement color, with fallback. */
export declare function cssColor(c: AcCmColor): string;
/** Creates a small dot element for persistent overlays (CSS2DRenderer). */
export declare function makeDot(c: AcCmColor): HTMLDivElement;
/** Creates a badge element for persistent overlays (CSS2DRenderer). */
export declare function makeBadge(c: AcCmColor, text?: string): HTMLDivElement;
/**
 * Creates a short-lived badge for live preview during jig interaction.
 * Appended to document.body with position:fixed and high z-index.
 * Caller is responsible for calling `.remove()` when done.
 */
export declare function makeLiveBadge(c: AcCmColor): HTMLDivElement;
/**
 * Creates a short-lived dot for live preview during jig interaction.
 * Appended to document.body with position:fixed and high z-index.
 * Caller is responsible for calling `.remove()` when done.
 */
export declare function makeLiveDot(c: AcCmColor): HTMLDivElement;
/**
 * Creates a square snap indicator for entity snapping during jig interaction.
 * Appended to document.body with position:fixed and high z-index.
 * Caller is responsible for calling `.remove()` when done.
 */
export declare function makeSnapIndicator(c: AcCmColor): HTMLDivElement;
/**
 * Creates a canvas overlay for drawing measurement graphics (arcs, fills, etc.).
 * Appended to the given container with position:absolute.
 * Caller is responsible for calling `.remove()` when done.
 */
export declare function makeOverlayCanvas(container: HTMLElement): HTMLCanvasElement;
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