/**
 * Text measurer interface — platform-specific (canvas, SVG) implementations provided externally.
 */
export interface ITextMeasurer {
    measureText(text: string, fontSize: number, fontWeight: number, fontStyle: string, fontFamily: string): number;
}
/**
 * Splits text into lines that fit within maxWidth.
 * Respects maxLines limit (or "auto" = unlimited).
 * Adds "…" ellipsis when text is truncated.
 */
export declare function getWrappedLines(measurer: ITextMeasurer, text: string, maxWidth: number, maxLines: number | 'auto', radius: number, fontSize: number, fontWeight?: number, fontStyle?: string, fontFamily?: string): string[];
/**
 * Computes an appropriate font size for a bubble based on its radius.
 * Ensures labels remain readable at all scales.
 */
export declare function computeFontSize(radius: number, baseFontSize?: number, fontWeight?: number, avgCharsPerLine?: number): number;