/** A length in points (dp on Android), or a percentage: see [`objectPosition`](#objectposition). */
export type PositionLength = number | `${number}%`;
/**
 * Where the image is in the view: see [`objectPosition`](#objectposition).
 */
export type ObjectPosition = string | (({
    top?: PositionLength;
    bottom?: never;
} | {
    bottom: PositionLength;
    top?: never;
}) & ({
    left?: PositionLength;
    right?: never;
} | {
    right: PositionLength;
    left?: never;
}));
export type ResolvedAxis = {
    fraction: number;
    offset: number;
};
export type ResolvedPosition = {
    x: ResolvedAxis;
    y: ResolvedAxis;
};
/** The default, `50% 50%`. */
export declare const CENTERED: ResolvedPosition;
/**
 * The position for objectPosition, or null if it isn't valid. A string is
 * CSS's syntax; an object has one of `top` and `bottom` and one of `left`
 * and `right`, each in points or a percentage, and a missing axis is
 * centered. Unset is centered.
 */
export declare function resolveObjectPosition(position: ObjectPosition | null | undefined): ResolvedPosition | null;
/**
 * The position for objectPosition, or centered if it isn't valid (as CSS
 * ignores it), with a warning in development.
 */
export declare function objectPositionOrCentered(position: ObjectPosition | null | undefined): ResolvedPosition;
/** The position as CSS (for the web version's object-position). */
export declare function cssPosition({ x, y }: ResolvedPosition): string;