Method draw

src/webgl/p5.Framebuffer.js:962–966

* Draws to the framebuffer by calling a function that contains drawing * instructions. * * The parameter, `callback`, is a function with the drawing instructions * for the framebuffer. For example, calling `myBuffer.draw(myFunction)` * will call a function named `myFunction()` to draw

(callback)

   * }
   */
  draw(callback) {
    this.begin();
    callback();
    this.end();
  }

  /**
   * Loads the current value of each pixel in the framebuffer into its