import { Document, Texture } from '@gltf-transform/core';
import { NEEDLE_compression_texture_schema } from '../extensions/index.js';
import { INeedleTextureTransformContext, NeedleTransformContext } from './needle_common.js';
export declare class NeedlePmremContext implements INeedleTextureTransformContext {
    private wasmModule;
    private pmremDir;
    private basisuExe;
    private tmpDir;
    private processed;
    private available;
    private logger;
    private readonly convertedTextures;
    /** In-memory dedup: keyed by EXR content hash, resolves to KTX2 bytes */
    private readonly processingPromises;
    prepare(document: Document): Promise<boolean>;
    process(index: number, texture: Texture, _settings: NEEDLE_compression_texture_schema | null, context: NeedleTransformContext): Promise<boolean>;
    /** Get or process EXR bytes into KTX2, with in-memory dedup and disk caching */
    private getOrProcessExr;
    private processExrToKtx2;
    finalize(document: Document): Promise<void>;
}