This method is called as a result of the
WebGLPipeline.batchQuad method, right before a quad
belonging to a Game Object is about to be added to the batch. When this is called, the
renderer has just performed a flush. It will bind the current render target, if any are set
and finally call the
|gameObject||Phaser.GameObjects.GameObject | Phaser.Cameras.Scene2D.Camera||<optional>||
The Game Object or Camera that invoked this pipeline, if any.
This WebGLPipeline instance.