This method is called by the WebGLPipeline.batchQuad method, right before a quad
belonging to a Game Object is about to be added to the batch.
It is also called directly bu custom Game Objects, such as Nine Slice or Mesh, from their render methods.
It causes a batch flush, then calls the preBatch method on the Post FX Pipelines
belonging to the Game Object.
It should be followed by a call to postBatch to complete the process.
| name | type | description |
|---|---|---|
| gameObject | Phaser.GameObjects.GameObject |
The Game Object about to be batched. |