using System;
using UnityEngine;

namespace UnityStandardAssets.ImageEffects
{
	// Token: 0x0200005A RID: 90
	[ExecuteInEditMode]
	[AddComponentMenu("Image Effects/Blur/Blur")]
	public class Blur : MonoBehaviour
	{
		// Token: 0x17000052 RID: 82
		// (get) Token: 0x060000E0 RID: 224 RVA: 0x000098E4 File Offset: 0x00007CE4
		protected Material material
		{
			get
			{
				if (Blur.m_Material == null)
				{
					Blur.m_Material = new Material(this.blurShader);
					Blur.m_Material.hideFlags = HideFlags.DontSave;
				}
				return Blur.m_Material;
			}
		}

		// Token: 0x060000E1 RID: 225 RVA: 0x00009917 File Offset: 0x00007D17
		protected void OnDisable()
		{
			if (Blur.m_Material)
			{
				global::UnityEngine.Object.DestroyImmediate(Blur.m_Material);
			}
		}

		// Token: 0x060000E2 RID: 226 RVA: 0x00009934 File Offset: 0x00007D34
		protected void Start()
		{
			if (!SystemInfo.supportsImageEffects)
			{
				base.enabled = false;
				return;
			}
			if (!this.blurShader || !this.material.shader.isSupported)
			{
				base.enabled = false;
				return;
			}
		}

		// Token: 0x060000E3 RID: 227 RVA: 0x00009980 File Offset: 0x00007D80
		public void FourTapCone(RenderTexture source, RenderTexture dest, int iteration)
		{
			float num = 0.5f + (float)iteration * this.blurSpread;
			Graphics.BlitMultiTap(source, dest, this.material, new Vector2[]
			{
				new Vector2(-num, -num),
				new Vector2(-num, num),
				new Vector2(num, num),
				new Vector2(num, -num)
			});
		}

		// Token: 0x060000E4 RID: 228 RVA: 0x00009A00 File Offset: 0x00007E00
		private void DownSample4x(RenderTexture source, RenderTexture dest)
		{
			float num = 1f;
			Graphics.BlitMultiTap(source, dest, this.material, new Vector2[]
			{
				new Vector2(-num, -num),
				new Vector2(-num, num),
				new Vector2(num, num),
				new Vector2(num, -num)
			});
		}

		// Token: 0x060000E5 RID: 229 RVA: 0x00009A78 File Offset: 0x00007E78
		private void OnRenderImage(RenderTexture source, RenderTexture destination)
		{
			int num = source.width / 4;
			int num2 = source.height / 4;
			RenderTexture renderTexture = RenderTexture.GetTemporary(num, num2, 0);
			this.DownSample4x(source, renderTexture);
			for (int i = 0; i < this.iterations; i++)
			{
				RenderTexture temporary = RenderTexture.GetTemporary(num, num2, 0);
				this.FourTapCone(renderTexture, temporary, i);
				RenderTexture.ReleaseTemporary(renderTexture);
				renderTexture = temporary;
			}
			Graphics.Blit(renderTexture, destination);
			RenderTexture.ReleaseTemporary(renderTexture);
		}

		// Token: 0x040001E6 RID: 486
		[Range(0f, 10f)]
		public int iterations = 3;

		// Token: 0x040001E7 RID: 487
		[Range(0f, 1f)]
		public float blurSpread = 0.6f;

		// Token: 0x040001E8 RID: 488
		public Shader blurShader;

		// Token: 0x040001E9 RID: 489
		private static Material m_Material;
	}
}