import { PNGImage } from "./PNGImage";
import { PNGPixelComponentAccess } from "./PNGPixelComponentAccess";
import { RGBA } from "./ChunkPalette";
import { ChunkHeader } from "./Chunk";
import { ChunkTransparency } from "./ChunkTransparency";
export declare class PNGImageGray implements PNGImage {
    header: ChunkHeader;
    width: number;
    height: number;
    pixelsAccess: PNGPixelComponentAccess;
    getPixel: (x: number, y: number) => Readonly<RGBA>;
    copyPixel: (x: number, y: number, rgba: RGBA) => RGBA;
    setPixel: (x: number, y: number, rgba: Readonly<RGBA>) => void;
    constructor(header: ChunkHeader, width: number, height: number, widthLine: number, pixels: PNGPixelComponentAccess, transparency?: ChunkTransparency);
    readonly hasPalette: boolean;
    readonly pixels: Uint8Array | DataView;
}
export declare class PNGImageGrayAlpha implements PNGImage {
    header: ChunkHeader;
    width: number;
    height: number;
    pixelsAccess: PNGPixelComponentAccess;
    getPixel: (x: number, y: number) => Readonly<RGBA>;
    copyPixel: (x: number, y: number, rgba: RGBA) => RGBA;
    setPixel: (x: number, y: number, rgba: Readonly<RGBA>) => void;
    constructor(header: ChunkHeader, width: number, height: number, pixels: PNGPixelComponentAccess);
    readonly hasPalette: boolean;
    readonly pixels: Uint8Array | DataView;
}