/// <reference types="node" />
/// <reference types="node" />
export declare const RGBA_CHANNELS = 4;
export declare const BITS_IN_BYTE = 8;
export declare const PNG_WIDTH_OFFSET = 16;
export declare const PNG_HEIGHT_OFFSET = 20;
export declare const PNG_SIGNATURE: Buffer;
export declare const PNG_BIT_DEPTH_EIGHT_BIT = 8;
export declare const PNG_COLOR_TYPE_RGBA = 6;
export declare const PNG_COMPRESSION_DEFLATE = 0;
export declare const PNG_FILTER_NO_FILTER = 0;
export declare const PNG_INTERLACE_NO_INTERLACE = 0;
export declare const PNG_IHDR_LENGTH = 13;
export declare const PNG_MIN_ASSIST_BYTES = 57;