import type { PdfAssetPolicy } from "./phase9-types.js";
export declare const MAX_IMAGE_PIXELS = 50000000;
export interface PreparedJpegImage {
    buffer: Buffer;
    colorSpace: "DeviceCMYK" | "DeviceGray" | "DeviceRGB";
    format: "jpeg";
    hash: string;
    height: number;
    width: number;
}
export interface PreparedPngImage {
    alphaBuffer?: Buffer;
    colorSpace: "DeviceRGB";
    compressedAlpha?: Buffer;
    compressedRgb: Buffer;
    format: "png";
    hash: string;
    height: number;
    rawAlphaLength?: number;
    rawRgbLength: number;
    width: number;
}
export type PreparedPdfImage = PreparedJpegImage | PreparedPngImage;
export declare function looksLikeJpeg(buffer: Buffer): boolean;
export declare function looksLikePng(buffer: Buffer): boolean;
export declare function parseJpegDimensions(buffer: Buffer): {
    colorSpace: PreparedJpegImage["colorSpace"];
    height: number;
    width: number;
};
export declare function preparePdfImage(source: Buffer | Uint8Array | string, formatHint?: "jpeg" | "png", assetPolicy?: PdfAssetPolicy): Promise<PreparedPdfImage>;
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