import type { LabelSnapshot } from './types';
/**
 * Render a label into an offscreen canvas sized to label.size (in map units
 * × PX_PER_UNIT) and return a PNG data URL.
 *
 * The label's registered style (looked up by `label.styleId`) hooks into the
 * draw pipeline: transformText → drawBackground → drawText → decorate. Any
 * stage a style doesn't override falls back to the built-in behavior, so the
 * default ('plain' / no style) is byte-identical to the un-styled render.
 */
export declare function generateLabelPixmap(label: LabelSnapshot): string;
/** Convert a PNG data URL to a Buffer for storage in the binary map. */
export declare function dataUrlToBuffer(dataUrl: string): Uint8Array;