/// <reference types="node" />
/**
 * Copied from zbar.h.
 */
export declare enum zbar_orientation_e {
    ZBAR_ORIENT_UNKNOWN = -1 /**< unable to determine orientation */,
    ZBAR_ORIENT_UP = 0 /**< upright, read left to right */,
    ZBAR_ORIENT_RIGHT = 1 /**< sideways, read top to bottom */,
    ZBAR_ORIENT_DOWN = 2 /**< upside-down, read right to left */,
    ZBAR_ORIENT_LEFT = 3 /**< sideways, read bottom to top */
}
/**
 * Represents the orientation of the symbol found within the image.
 */
export declare enum Orientation {
    /** Unable to determine orientation */
    Unknown = -1,
    /** Upright, read left to right */
    Up = 0,
    /** Sideways, read top to bottom */
    Right = 1,
    /** Upside-down, read right to left */
    Down = 2,
    /** Sideways, read bottom to top */
    Left = 3
}
/**
 * Copied from zbar.h.
 */
export declare enum zbar_symbol_type_e {
    ZBAR_NONE = 0 /**< no symbol decoded */,
    ZBAR_PARTIAL = 1 /**< intermediate status */,
    ZBAR_EAN2 = 2 /**< GS1 2-digit add-on */,
    ZBAR_EAN5 = 5 /**< GS1 5-digit add-on */,
    ZBAR_EAN8 = 8 /**< EAN-8 */,
    ZBAR_UPCE = 9 /**< UPC-E */,
    ZBAR_ISBN10 = 10 /**< ISBN-10 (from EAN-13). @since 0.4 */,
    ZBAR_UPCA = 12 /**< UPC-A */,
    ZBAR_EAN13 = 13 /**< EAN-13 */,
    ZBAR_ISBN13 = 14 /**< ISBN-13 (from EAN-13). @since 0.4 */,
    ZBAR_COMPOSITE = 15 /**< EAN/UPC composite */,
    ZBAR_I25 = 25 /**< Interleaved 2 of 5. @since 0.4 */,
    ZBAR_DATABAR = 34 /**< GS1 DataBar (RSS). @since 0.11 */,
    ZBAR_DATABAR_EXP = 35 /**< GS1 DataBar Expanded. @since 0.11 */,
    ZBAR_CODABAR = 38 /**< Codabar. @since 0.11 */,
    ZBAR_CODE39 = 39 /**< Code 39. @since 0.4 */,
    ZBAR_PDF417 = 57 /**< PDF417. @since 0.6 */,
    ZBAR_QRCODE = 64 /**< QR Code. @since 0.10 */,
    ZBAR_SQCODE = 80 /**< SQ Code. @since 0.20.1 */,
    ZBAR_CODE93 = 93 /**< Code 93. @since 0.11 */,
    ZBAR_CODE128 = 128 /**< Code 128 */,
    /** mask for base symbol type.
     * @deprecated in 0.11, remove this from existing code
     */
    ZBAR_SYMBOL = 255,
    /** 2-digit add-on flag.
     * @deprecated in 0.11, a  = =ZBAR_EAN2 component is used for
     * 2-digit GS1 add-ons
     */
    ZBAR_ADDON2 = 512,
    /** 5-digit add-on flag.
     * @deprecated in 0.11, a  = =ZBAR_EAN5 component is used for
     * 5-digit GS1 add-ons
     */
    ZBAR_ADDON5 = 1280,
    /** add-on flag mask.
     * @deprecated in 0.11, GS1 add-ons are represented using composite
     * symbols of type  = =ZBAR_COMPOSITE; add-on components use  = =ZBAR_EAN2
     * or  = =ZBAR_EAN5
     */
    ZBAR_ADDON = 1792
}
/**
 * Represents which type of symbol was found.
 */
export declare enum SymbolType {
    QRCode = 64
}
/**
 * A relevant location within a found symbol.
 */
export interface SymbolLocation {
    x: number;
    y: number;
}
/**
 * A symbol, e.g. a QR code, found in an image.
 */
export interface Symbol {
    type: SymbolType;
    data: Buffer;
    orientation: Orientation;
    locations: readonly SymbolLocation[];
    quality?: number;
}
/**
 * Finds symbols in an image.
 *
 * @param data raw pixel data (RGBA)
 * @param width count of pixels wide
 * @param height count of pixels tall
 * @returns a list of symbols
 */
export declare function detect(data: Buffer | Uint8Array | Uint8ClampedArray, width: number, height: number): readonly Symbol[];
export declare const versions: {
    /**
     * The version of ZBar compiled against.
     */
    zbar: string;
};