Method addNativeFunction

src/gpu.js:519–525

* @desc Adds additional native functions, that the kernel may call. * @param {String} name - native function name, used for reverse lookup * @param {String} source - the native function implementation, as it would be defined in it's entirety * @param {object} [settings] * @returns {GPU}

(name, source, settings)

   * @returns {GPU} returns itself
   */
  addNativeFunction(name, source, settings) {
    if (this.kernels.length > 0) {
      throw new Error('Cannot call "addNativeFunction" after "createKernels" has been called.');
    }
    this.nativeFunctions.push(Object.assign({ name, source }, settings));
    return this;
  }

  /**
   * Inject a string just before translated kernel functions