import type { Mat } from "./api.js";
/**
 * Produces a 2x3 viewport matrix to transform projected coordinates to
 * screen space.
 *
 * @param out -
 * @param left -
 * @param right -
 * @param bottom -
 * @param top -
 */
export declare const viewport: (out: Mat | null, left: number, right: number, bottom: number, top: number) => Mat;
//# sourceMappingURL=viewport.d.ts.map