using UnityEngine;
using UnityEngine.Rendering;

[ExecuteInEditMode]
public class CopyMainCameraDepth : MonoBehaviour
{
	public Material waterMat;

	public RenderTexture m_CamDepth;

	private CommandBuffer m_CmdDepthGrab;

	private Material m_DepthGrabMat;

	private int m_pixelWidth;

	private int m_pixelHeight;

	private void Start()
	{
		m_DepthGrabMat = new Material(Shader.Find("SkyMaster/iOS_Depth_Grab"));
		m_CmdDepthGrab = new CommandBuffer();
		Camera.main.AddCommandBuffer(CameraEvent.BeforeImageEffectsOpaque, m_CmdDepthGrab);
		Camera.main.depthTextureMode |= DepthTextureMode.Depth;
	}

	private void Update()
	{
		if (m_CmdDepthGrab == null)
		{
			m_DepthGrabMat = new Material(Shader.Find("SkyMaster/iOS_Depth_Grab"));
			m_CmdDepthGrab = new CommandBuffer();
			Camera.main.AddCommandBuffer(CameraEvent.BeforeImageEffectsOpaque, m_CmdDepthGrab);
			Camera.main.depthTextureMode |= DepthTextureMode.Depth;
		}
		if (m_CamDepth == null || !m_CamDepth.IsCreated() || Camera.main.pixelWidth != m_pixelWidth || Camera.main.pixelHeight != m_pixelHeight)
		{
			m_pixelWidth = Camera.main.pixelWidth;
			m_pixelHeight = Camera.main.pixelHeight;
			m_CamDepth = new RenderTexture(m_pixelWidth, m_pixelHeight, 0, RenderTextureFormat.RFloat);
			m_CamDepth.Create();
			if (waterMat != null)
			{
				waterMat.SetTexture("_camDepthTex", m_CamDepth);
			}
		}
		m_CmdDepthGrab.Clear();
		m_CmdDepthGrab.name = "Grab depth";
		m_CmdDepthGrab.Blit(m_CamDepth, m_CamDepth, m_DepthGrabMat);
	}
}