import { RGBA } from "./ChunkPalette";
import { ChunkHeader } from "./Chunk";
export interface PNGImage {
    readonly width: number;
    readonly height: number;
    readonly hasPalette: boolean;
    readonly pixels: Uint8Array | DataView;
    readonly header: ChunkHeader;
    getPixel(x: number, y: number): Readonly<RGBA>;
    copyPixel(x: number, y: number, rgba: RGBA): RGBA;
    setPixel(x: number, y: number, rgba: Readonly<RGBA>): void;
}
export interface PNGImageWithPalette extends PNGImage {
    getIndex(x: number, y: number): number;
    setIndex(x: number, y: number, index: number): void;
}
export declare function computeLineByteWidth(width: number, bitDepth: number, componentCount: number): number;
export declare function computeImageSize(width: number, height: number, bitDepth: number, componentCount: number): number;
export declare function computeLinePixelWidth(width: number, bitDepth: number): number;