using UnityEngine;

namespace AQUAS
{
	public class AQUAS_CaptureBackground : MonoBehaviour
	{
		public GameObject waterObj;

		public RenderTexture target;

		private Camera cam;

		public int quality = 2;

		public LayerMask layerMask = -1;

		private void Start()
		{
			int num = (int)Mathf.Pow(2f, quality);
			target = new RenderTexture(Screen.width / num, Screen.height / num, 32, RenderTextureFormat.ARGBHalf);
			cam = GetComponent<Camera>();
			cam.targetTexture = target;
			cam.pixelRect = new Rect(0f, 0f, Screen.width / num, Screen.height / num);
		}

		private void OnPreCull()
		{
			if (!(waterObj == null))
			{
				cam.cullingMask = layerMask;
				cam.cullingMask &= ~(1 << LayerMask.NameToLayer("Water"));
				waterObj.layer = LayerMask.NameToLayer("Water");
			}
		}

		private void OnPostRender()
		{
			if (!(waterObj == null))
			{
				waterObj.layer = LayerMask.NameToLayer("Default");
			}
		}

		private void Update()
		{
			if (target.width != Screen.width || target.height != Screen.height)
			{
				target.Release();
				target.width = Screen.width;
				target.height = Screen.height;
			}
		}

		private void OnRenderImage(RenderTexture source, RenderTexture destination)
		{
			Graphics.Blit(source, destination);
			if (waterObj != null)
			{
				waterObj.GetComponent<Renderer>().sharedMaterials[1].SetTexture("_BackgroundTex", target);
				target.Release();
			}
			else
			{
				target.Release();
			}
		}
	}
}