import type { CSSProperties } from "react";
interface GenerateOutlookImageVmlOptions {
    src: string;
    width: string | number | undefined;
    height: string | number | undefined;
    borderRadius: CSSProperties["borderRadius"];
    alt?: string | null;
    href?: string | null;
}
/**
 * Builds the VML shape that rounds an image in classic Outlook, where CSS `border-radius` has no effect.
 *
 * Returns `null` when the radius or the dimensions cannot be turned into a VML shape. The caller then
 * renders the plain image, which classic Outlook shows with square corners.
 */
export declare function generateOutlookImageVml({ src, width, height, borderRadius, alt, href }: GenerateOutlookImageVmlOptions): string | null;
interface GenerateOutlookImageVmlRowOptions {
    outlookImageVml: string;
    align?: "left" | "center" | "right";
    padding?: string | number;
    paddingTop?: string | number;
    paddingRight?: string | number;
    paddingBottom?: string | number;
    paddingLeft?: string | number;
}
/**
 * Puts the VML into the row and cell that `mj-image` renders for the other clients, so the column
 * table has the same structure in classic Outlook.
 */
export declare function generateOutlookImageVmlRow({ outlookImageVml, align, ...padding }: GenerateOutlookImageVmlRowOptions): string;
export {};