All files / src/capabilities CapabilityDetector.ts

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import { ICapabilities } from "../types.js";
 
/**
 * 実行環境の能力（WASM, Threads, SIMD, WebGPU等）を検知します。
 */
export class CapabilityDetector {
  static async detect(): Promise<ICapabilities> {
    const nav = typeof navigator !== "undefined" ? navigator : null;
 
    return {
      opfs: !!nav?.storage?.getDirectory,
      wasmThreads: this.checkWasmThreads(),
      wasmSimd: this.checkWasmSimd(),
      webNN: !!nav && "ml" in nav,
      webGPU: !!nav && "gpu" in nav,
      webTransport: "WebTransport" in globalThis,
    };
  }
 
  private static checkWasmThreads(): boolean {
    try {
      Eif (typeof MessageChannel !== "undefined") {
        new WebAssembly.Memory({ shared: true, initial: 1, maximum: 1 });
        return true;
      }
    } catch {
      // Ignore
    }
    return false;
  }
 
  private static checkWasmSimd(): boolean {
    // 2026: WASM SIMD は主要ブラウザで標準
    return true;
  }
}