import type { IOBuffer } from 'iobuffer';
import type { DeflateFunctionOptions } from 'pako';
export type { DeflateFunctionOptions } from 'pako';
export type PngDataArray = Uint8Array | Uint8ClampedArray | Uint16Array;
export type DecoderInputType = IOBuffer | ArrayBufferLike | ArrayBufferView;
export type BitDepth = 1 | 2 | 4 | 8 | 16;
export type IndexedColorBitDepth = 1 | 2 | 4 | 8;
export interface PngResolution {
    /**
     * Pixels per unit, X axis
     */
    x: number;
    /**
     * Pixels per unit, Y axis
     */
    y: number;
    /**
     * Unit specifier
     */
    unit: ResolutionUnitSpecifier;
}
export declare enum ResolutionUnitSpecifier {
    /**
     * Unit is unknown
     */
    UNKNOWN = 0,
    /**
     * Unit is the metre
     */
    METRE = 1
}
export interface ImageData {
    width: number;
    height: number;
    data: PngDataArray;
    depth?: BitDepth;
    channels?: number;
    text?: Record<string, string>;
    palette?: IndexedColors;
    transparency?: Uint16Array;
}
export interface DecodedPng {
    width: number;
    height: number;
    data: PngDataArray;
    depth: BitDepth;
    channels: number;
    text: Record<string, string>;
    resolution?: PngResolution;
    palette?: IndexedColors;
    transparency?: Uint16Array;
    iccEmbeddedProfile?: IccEmbeddedProfile;
}
export interface DecodedApng {
    width: number;
    height: number;
    depth: BitDepth;
    channels: number;
    numberOfFrames: number;
    numberOfPlays: number;
    text: Record<string, string>;
    resolution?: PngResolution;
    palette?: IndexedColors;
    transparency?: Uint16Array;
    iccEmbeddedProfile?: IccEmbeddedProfile;
    frames: DecodedApngFrame[];
}
export interface ApngFrame {
    sequenceNumber: number;
    width: number;
    height: number;
    xOffset: number;
    yOffset: number;
    delayNumber: number;
    delayDenominator: number;
    disposeOp: number;
    blendOp: number;
    data: PngDataArray;
}
export interface DecodedApngFrame {
    sequenceNumber: number;
    delayNumber: number;
    delayDenominator: number;
    data: PngDataArray;
}
export interface PngDecoderOptions {
    checkCrc?: boolean;
}
export interface PngEncoderOptions {
    interlace?: 'null' | 'Adam7';
    zlib?: DeflateFunctionOptions;
}
export type IndexedColors = number[][];
export interface IccEmbeddedProfile {
    name: string;
    profile: Uint8Array;
}