import { type IGLTFExporterExtensionV2 } from "../glTFExporterExtension.js";
import { GLTFExporter } from "../glTFExporter.js";
import { type IAccessor, type IMeshPrimitive } from "babylonjs-gltf2interface";
import { type BufferManager } from "../bufferManager.js";
/**
 * [Specification](https://github.com/KhronosGroup/glTF/blob/main/extensions/2.0/Khronos/KHR_draco_mesh_compression/README.md)
 */
export declare class KHR_draco_mesh_compression implements IGLTFExporterExtensionV2 {
    /** Name of this extension */
    readonly name = "KHR_draco_mesh_compression";
    /** Defines whether this extension is enabled */
    enabled: boolean;
    /** KHR_draco_mesh_compression is required, as uncompressed fallback data is not yet implemented. */
    required: boolean;
    /** BufferViews used for Draco data, which may be eligible for removal after Draco encoding */
    private _bufferViewsUsed;
    /** Accessors that were replaced with Draco data, which may be eligible for removal after Draco encoding */
    private _accessorsUsed;
    /** Promise pool for Draco encoding work */
    private _encodePromises;
    private _wasUsed;
    /** @internal */
    get wasUsed(): boolean;
    /** @internal */
    constructor(exporter: GLTFExporter);
    /** @internal */
    dispose(): void;
    /** @internal */
    postExportMeshPrimitive(primitive: IMeshPrimitive, bufferManager: BufferManager, accessors: IAccessor[]): void;
    /** @internal */
    preGenerateBinaryAsync(bufferManager: BufferManager): Promise<void>;
}
/**
 * Registers the KHR_draco_mesh_compression glTF serializer extension with the {@link GLTFExporter}.
 * Safe to call multiple times; only the first call has an effect.
 */
export declare function RegisterKHR_draco_mesh_compression(): void;