using UnityEngine;
using UnityEngine.XR;

namespace DynamicFogAndMist
{
	[ExecuteInEditMode]
	[ImageEffectAllowedInSceneView]
	[HelpURLAttribute("http://kronnect.com/taptapgo")]
	[RequireComponent(typeof(Camera))]
	public class DynamicFogExclusive : DynamicFogBase
	{
		private RenderTexture rt;

		[Range(0.1f, 2f)]
		public float renderScale = 1f;

		private void OnPreRender()
		{
			if (!(fogMat == null) && _alpha != 0f && !(currentCamera == null))
			{
				if (XRSettings.enabled)
				{
					RenderTextureDescriptor eyeTextureDesc = XRSettings.eyeTextureDesc;
					eyeTextureDesc.width = (int)((float)eyeTextureDesc.width * renderScale);
					eyeTextureDesc.height = (int)((float)eyeTextureDesc.height * renderScale);
					rt = RenderTexture.GetTemporary(eyeTextureDesc);
				}
				else
				{
					int width = (int)((float)currentCamera.pixelWidth * renderScale);
					int num = (int)((float)currentCamera.pixelHeight * renderScale);
					rt = RenderTexture.GetTemporary(width, num, 24, RenderTextureFormat.ARGB32);
					rt.antiAliasing = 1;
				}
				rt.wrapMode = TextureWrapMode.Clamp;
				currentCamera.targetTexture = rt;
			}
		}

		private void OnPostRender()
		{
			if (fogMat == null || _alpha == 0f || currentCamera == null)
			{
				return;
			}
			if (shouldUpdateMaterialProperties)
			{
				shouldUpdateMaterialProperties = false;
				UpdateMaterialPropertiesNow();
			}
			if (currentCamera.orthographic)
			{
				if (!matOrtho)
				{
					ResetMaterial();
				}
				fogMat.SetVector("_ClipDir", currentCamera.transform.forward);
			}
			else if (matOrtho)
			{
				ResetMaterial();
			}
			if (_useSinglePassStereoRenderingMatrix && XRSettings.enabled)
			{
				fogMat.SetMatrix("_ClipToWorld", currentCamera.cameraToWorldMatrix);
			}
			else
			{
				fogMat.SetMatrix("_ClipToWorld", currentCamera.cameraToWorldMatrix * currentCamera.projectionMatrix.inverse);
			}
			currentCamera.targetTexture = null;
			Graphics.Blit(rt, null, fogMat);
			RenderTexture.ReleaseTemporary(rt);
		}
	}
}