import { ColorType, Chunk, ChunkHeader } from "./Chunk";
import { ChunkText } from "./ChunkText";
import { ChunkTransparency } from "./ChunkTransparency";
import { ChunkPalette } from "./ChunkPalette";
import { PNGImage } from "./PNGImage";
import { PNGImageRGBA } from "./PNGImageRGB";
export interface PNGDelegate {
    chunk?(chunk: Chunk, buffer: ArrayBuffer): void;
}
export declare class PNGFile {
    chunks: Chunk[];
    private constructor();
    static create(header: ChunkHeader, palette?: ChunkPalette, transparency?: ChunkTransparency): PNGFile;
    static parse(buffer: ArrayBuffer, delegate?: PNGDelegate): PNGFile;
    toArrayBuffer(): ArrayBuffer;
    readonly width: number;
    readonly height: number;
    readonly colorType: ColorType;
    readonly interlace: number;
    readonly bitDepth: number;
    firstChunk(type: string): Chunk | undefined;
    firstText(keyword: string): ChunkText | undefined;
    private dpiFromPhysChunk;
    private dpiFromText;
    readonly dpi: {
        x: number;
        y: number;
    } | undefined;
    readonly componentCount: number;
    readonly pixelSize: number;
    private createPixelAccess;
    private rawPixels;
    private static validateBitDepth;
    renderImage(): PNGImage;
    updateImage(image: PNGImage): void;
    toRGBA(): [PNGFile, PNGImageRGBA];
    clone(): PNGFile;
}