import { Document, Texture } from "@gltf-transform/core";
import { KHRTextureBasisu } from "@gltf-transform/extensions";
import { NEEDLE_compression_texture_schema } from "../extensions/index.js";
import { INeedleTextureTransformContext, NeedleTransformContext } from "./needle_common.js";
export interface NeedleToktxOptions {
    debug?: boolean;
    jobs?: number;
    toktxPath?: string;
}
export declare class NeedleToktxContext implements INeedleTextureTransformContext {
    limit: any;
    basisuExtension: KHRTextureBasisu;
    version: string;
    cacheDirectory: string;
    tmpPathBase: string;
    document: Document;
    env: undefined | {
        PATH: string;
    };
    numTextures: number;
    private _prepareFailed;
    constructor(options: NeedleToktxOptions);
    prepare(document: Document): Promise<boolean>;
    process(index: number, texture: Texture, settings: Pick<NEEDLE_compression_texture_schema, "mode"> | null, context: NeedleTransformContext): Promise<boolean>;
    finalize(document: Document): Promise<void>;
}