Method readback

src/Readback.ts:289–299

({
    readback,
  }: { readback: B })

  // Perform a readback of the render target, returning a buffer of the
  // given type.
  async readback<B extends ReadbackBuffer>({
    readback,
  }: { readback: B }): Promise<B> {
    if (!this.renderer) {
      throw new Error("No renderer");
    }
    const renderState = this.saveRenderState(this.renderer);
    const promise = this.read({ readback });
    this.resetRenderState(this.renderer, renderState);
    return promise;
  }

  // Perform a render and readback operation for the given Rgba8Readback,
  // and readback buffer (call ensureBuffer first).