import * as ort from "onnxruntime-web";
import type { CanvasOps, CoreCanvas, PlatformProvider } from "../core/platform.js";
/** True when `navigator.gpu` is present and at least one adapter is available. */
export declare function isWebGpuAvailable(): Promise<boolean>;
/** Returns `["webgpu", "wasm"]` when WebGPU is available, otherwise `["wasm"]`. */
export declare function getDefaultWebExecutionProviders(): Promise<ort.InferenceSession.SessionOptions["executionProviders"]>;
export declare class WebPlatformProvider implements PlatformProvider<CoreCanvas> {
    readonly pathSeparator = "/";
    readonly ort: PlatformProvider["ort"];
    createCanvas(_width: number, _height: number): CoreCanvas;
    isCanvas(image: unknown): image is CoreCanvas;
    loadResource(source: string | ArrayBuffer | undefined, defaultUrl: string): Promise<ArrayBuffer>;
    saveDebugImage(_canvas: CoreCanvas, _filename: string, _outputDir: string): Promise<void>;
    readonly canvas: CanvasOps<CoreCanvas>;
}