import type { ImageEditRequest, ImageGenerateRequest, ImageProvider, ImageProviderCallContext, ImageProviderInfo, ImageResult } from '../types/images.js';
import type { AssetTransformer } from './transform.js';
/** Options for the Google image provider, for the Gemini API or Vertex AI. */
export interface GoogleImageProviderConfig {
    /** Gemini API key, sent as `x-goog-api-key`. */
    apiKey?: string;
    /**
     * OAuth bearer token for Vertex AI. Takes precedence over `apiKey`, and requires `baseUrl` to point
     * at a Vertex endpoint such as `https://us-central1-aiplatform.googleapis.com/v1/projects/P/locations/us-central1/publishers/google`.
     */
    accessToken?: string;
    /**
     * API base URL. Defaults to the Gemini API, `https://generativelanguage.googleapis.com/v1beta`.
     */
    baseUrl?: string;
    /** Model for generation. Defaults to `imagen-4.0-generate-001`. */
    generateModel?: string;
    /** Model for edits. Defaults to `imagen-3.0-capability-001`. */
    editModel?: string;
    /** Headers added to every request. */
    defaultHeaders?: Record<string, string>;
    /** Replaces the global `fetch`. */
    fetch?: typeof globalThis.fetch;
    /** Converts a neutral mask to Imagen's white-is-editable greyscale. Loaded on first masked request. */
    maskTransformer?: AssetTransformer;
    /** `dont_allow`, `allow_adult`, or `allow_all`, passed through as `personGeneration`. */
    personGeneration?: string;
    /** Keeps Google's response on each result as `raw`. Off by default. */
    includeRawResponse?: boolean;
}
/**
 * Google Imagen through the `:predict` protocol, on either the Gemini API or Vertex AI.
 *
 * The second hosted wire protocol behind the neutral image contract, and deliberately a different
 * shape from OpenAI's: aspect ratio instead of pixel dimensions, seeds and negative prompts that
 * OpenAI refuses, masks as a white-is-editable greyscale reference image rather than an alpha
 * channel, and safety filtering reported per image rather than as a request failure.
 */
export declare class GoogleImageProvider implements ImageProvider {
    private readonly config;
    /** Provider name, capabilities, and models. */
    readonly info: ImageProviderInfo;
    private readonly baseUrl;
    private readonly fetchImplementation;
    private readonly generateModel;
    private readonly editModel;
    constructor(config: GoogleImageProviderConfig);
    /** Generates images from a prompt. */
    generate(request: ImageGenerateRequest, context: ImageProviderCallContext): Promise<ImageResult>;
    /** Edits an image, optionally within a mask. */
    edit(request: ImageEditRequest, context: ImageProviderCallContext): Promise<ImageResult>;
    private parameters;
    private predict;
    private normalize;
}