Method _beforeBegin

src/webgl/p5.Framebuffer.js:819–828

* Ensures that the framebuffer is ready to be drawn to * * @private

()

   * @private
   */
  _beforeBegin() {
    this.renderer.bindFramebuffer(this);
    this.renderer.viewport(
      this.width * this.density,
      this.height * this.density
    );
    if (this.renderer.flushDraw) {
      this.renderer.flushDraw();
    }
  }

  /**
   * Ensures that the framebuffer is ready to be read by other framebuffers.