import { type ImageTranscoder } from "@earendil-works/pi-tui";
export declare function convertImageBytesToPng(bytes: Uint8Array): Promise<Uint8Array | null>;
/**
 * Convert image to PNG format for terminal display.
 * Kitty graphics protocol requires PNG format (f=100).
 */
export declare function convertToPng(base64Data: string, mimeType: string): Promise<{
    data: string;
    mimeType: string;
} | null>;
/** Load photon once and return a synchronous PNG transcoder for Kitty image rendering. */
export declare function loadPngTranscoder(): Promise<ImageTranscoder | undefined>;
/** Register the PNG transcoder on Kitty terminals, then redraw callers' fallback images. */
export declare function ensurePngTranscoder(onRegistered: () => void): void;
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