/**
 * Type Definitions for libnextimage
 * These types map to the C library interface (matching golang/webp.go)
 */
/**
 * Status codes returned by libnextimage functions
 */
export declare enum NextImageStatus {
    OK = 0,
    ERROR_INVALID_PARAM = -1,
    ERROR_ENCODE_FAILED = -2,
    ERROR_DECODE_FAILED = -3,
    ERROR_OUT_OF_MEMORY = -4,
    ERROR_UNSUPPORTED = -5,
    ERROR_BUFFER_TOO_SMALL = -6
}
/**
 * Pixel format types supported by libnextimage
 */
export declare enum PixelFormat {
    RGBA = 0,// RGBA 8bit/channel
    RGB = 1,// RGB 8bit/channel
    BGRA = 2,// BGRA 8bit/channel
    YUV420 = 3,// YUV 4:2:0 planar
    YUV422 = 4,// YUV 4:2:2 planar
    YUV444 = 5
}
/**
 * Convert PixelFormat string or number to number
 */
export declare function normalizePixelFormat(format: PixelFormat | string | number | undefined): number;
/**
 * WebP Preset types
 */
export declare enum WebPPreset {
    DEFAULT = 0,// default preset
    PICTURE = 1,// digital picture, like portrait
    PHOTO = 2,// outdoor photograph
    DRAWING = 3,// hand or line drawing
    ICON = 4,// small-sized colorful images
    TEXT = 5
}
/**
 * WebP image hint types
 */
export declare enum WebPImageHint {
    DEFAULT = 0,// default hint
    PICTURE = 1,// digital picture, like portrait
    PHOTO = 2,// outdoor photograph
    GRAPH = 3
}
/**
 * WebP encoding options (matching Golang implementation)
 * Simplified version with commonly used options
 */
export interface WebPEncodeOptions {
    quality?: number;
    lossless?: boolean;
    method?: number;
    preset?: WebPPreset;
    imageHint?: WebPImageHint;
    exact?: boolean;
}
/**
 * WebP decoding options (simplified)
 */
export interface WebPDecodeOptions {
    useThreads?: boolean;
    format?: PixelFormat;
}
/**
 * AVIF YUV format types
 */
export declare enum AVIFYUVFormat {
    YUV444 = 0,// 4:4:4 (no chroma subsampling)
    YUV422 = 1,// 4:2:2 (horizontal subsampling)
    YUV420 = 2,// 4:2:0 (both horizontal and vertical subsampling)
    YUV400 = 3
}
/**
 * AVIF YUV range types
 */
export declare enum AVIFYUVRange {
    LIMITED = 0,// Limited range (16-235 for 8-bit)
    FULL = 1
}
/**
 * AVIF encoding options (matching Golang implementation)
 */
export interface AVIFEncodeOptions {
    quality?: number;
    qualityAlpha?: number;
    speed?: number;
    bitDepth?: number;
    yuvFormat?: AVIFYUVFormat;
    yuvRange?: AVIFYUVRange;
    enableAlpha?: boolean;
    premultiplyAlpha?: boolean;
    tileRowsLog2?: number;
    tileColsLog2?: number;
    colorPrimaries?: number;
    transferCharacteristics?: number;
    matrixCoefficients?: number;
    sharpYUV?: boolean;
    targetSize?: number;
    exifData?: Buffer;
    xmpData?: Buffer;
    iccData?: Buffer;
    irotAngle?: number;
    imirAxis?: number;
}
/**
 * AVIF decoding options
 */
export interface AVIFDecodeOptions {
    useThreads?: boolean;
    format?: PixelFormat;
    ignoreExif?: boolean;
    ignoreXMP?: boolean;
    ignoreICC?: boolean;
    imageSizeLimit?: number;
    imageDimensionLimit?: number;
    strictFlags?: number;
    chromaUpsampling?: number;
}
/**
 * Decoded image data
 */
export interface DecodedImage {
    data: Buffer;
    width: number;
    height: number;
    stride: number;
    format: PixelFormat;
    bitDepth: number;
    uPlane?: Buffer;
    vPlane?: Buffer;
    uStride?: number;
    vStride?: number;
}
/**
 * Helper: Check if status indicates success
 */
export declare function isSuccess(status: NextImageStatus): boolean;
/**
 * Helper: Convert C integer boolean to TypeScript boolean
 * In C, 0 is false and non-zero is true
 */
export declare function cBoolToBoolean(value: number): boolean;
/**
 * Helper: Convert TypeScript boolean to C integer boolean
 */
export declare function booleanToCBool(value: boolean): number;
/**
 * Helper: Get error message for status code
 */
export declare function getStatusMessage(status: NextImageStatus): string;
/**
 * Custom error class for libnextimage operations
 */
export declare class NextImageError extends Error {
    status: NextImageStatus;
    constructor(status: NextImageStatus, message?: string);
}
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