import { Barcode1D, Label, draw } from 'barcode-bakery-common';
/**
 * Constructor.
 */
declare class Upce extends Barcode1D {
    private readonly codeParity;
    /**
     * The UPCE value.
     */
    protected upce: string | null;
    /**
     * The label on the left.
     */
    protected labelLeft: Label | null;
    /**
     * The label on the center.
     */
    protected labelCenter: Label | null;
    /**
     * The label on the right.
     */
    protected labelRight: Label | null;
    constructor();
    /**
     * Draws the barcode.
     *
     * @param image The surface.
     */
    draw(image: draw.Surface): void;
    /**
     * Returns the maximal size of a barcode.
     * [0]->width
     * [1]->height
     *
     * @param width The width.
     * @param height The height.
     * @return An array, [0] being the width, [1] being the height.
     */
    getDimension(width: number, height: number): number[];
    /**
     * Adds the default label.
     */
    protected addDefaultLabel(): void;
    /**
     * Checks if the default ean label is enabled.
     *
     * @return True if default label is enabled.
     */
    protected isDefaultEanLabelEnabled(): boolean;
    /**
     * Validates the input.
     */
    protected validate(): void;
    /**
     * Overloaded method to calculate checksum.
     */
    protected calculateChecksum(): void;
    /**
     * Overloaded method to display the checksum.
     *
     * @return The checksum value.
     */
    protected processChecksum(): string | null;
    /**
     * Draws the extended bars on the image.
     *
     * @param im The surface.
     * @param plus How much more we should display the bars.
     */
    protected drawExtendedBars(im: draw.Surface, plus: number): void;
    /**
     * Inverses the string when the inverse parameter is equal to 1.
     *
     * @param text The text.
     * @param inverse The inverse.
     * @return string The reversed string.
     */
    private static inverse;
}
export { Upce };