using UnityEngine;

namespace VolumetricFogAndMist
{
	[RequireComponent(typeof(Camera), typeof(VolumetricFog))]
	[AddComponentMenu("")]
	[ExecuteInEditMode]
	public class VolumetricFogPosT : MonoBehaviour, IVolumetricFogRenderComponent
	{
		private Material copyOpaqueMat;

		public VolumetricFog fog { get; set; }

		private void OnRenderImage(RenderTexture source, RenderTexture destination)
		{
			if (fog == null || !fog.enabled)
			{
				Graphics.Blit(source, destination);
				return;
			}
			if (fog.transparencyBlendMode == TRANSPARENT_MODE.None)
			{
				fog.DoOnRenderImage(source, destination);
				return;
			}
			RenderTextureDescriptor descriptor = source.descriptor;
			RenderTexture temporary = RenderTexture.GetTemporary(descriptor);
			if (copyOpaqueMat == null)
			{
				copyOpaqueMat = new Material(Shader.Find("VolumetricFogAndMist/CopyOpaque"));
			}
			copyOpaqueMat.SetFloat("_BlendPower", fog.transparencyBlendPower);
			Graphics.Blit(source, destination, copyOpaqueMat, (fog.computeDepth && fog.downsampling == 1) ? 1 : 0);
			RenderTexture.ReleaseTemporary(temporary);
		}

		public void DestroySelf()
		{
			Object.DestroyImmediate(this);
		}
	}
}