using System;
using UnityEngine;

namespace AmplifyBloom
{
    //¹âÔδ¦Àí
	[Serializable]
	public class AmplifyLensFlare : IAmplifyItem
	{
		private const int LUTTextureWidth = 256;

		[SerializeField]
		private float m_overallIntensity = 1f;

		[SerializeField]
		private float m_normalizedGhostIntensity = 0.8f;

		[SerializeField]
		private float m_normalizedHaloIntensity = 0.1f;

		[SerializeField]
		private bool m_applyLensFlare = true;

		[SerializeField]
		private int m_lensFlareGhostAmount = 3;

		[SerializeField]
		private Vector4 m_lensFlareGhostsParams = new Vector4(0.8f, 0.228f, 1f, 4f);

		[SerializeField]
		private float m_lensFlareGhostChrDistortion = 2f;

		[SerializeField]
		private Gradient m_lensGradient;

		[SerializeField]
		private Texture2D m_lensFlareGradTexture;

		private Color[] m_lensFlareGradColor = new Color[256];

		[SerializeField]
		private Vector4 m_lensFlareHaloParams = new Vector4(0.1f, 0.573f, 1f, 128f);

		[SerializeField]
		private float m_lensFlareHaloChrDistortion = 1.51f;

		[SerializeField]
		private int m_lensFlareGaussianBlurAmount = 1;

		public bool ApplyLensFlare
		{
			get
			{
				return this.m_applyLensFlare;
			}
			set
			{
				this.m_applyLensFlare = value;
			}
		}

		public float OverallIntensity
		{
			get
			{
				return this.m_overallIntensity;
			}
			set
			{
				this.m_overallIntensity = ((value < 0f) ? 0f : value);
				this.m_lensFlareGhostsParams.x = value * this.m_normalizedGhostIntensity;
				this.m_lensFlareHaloParams.x = value * this.m_normalizedHaloIntensity;
			}
		}

		public int LensFlareGhostAmount
		{
			get
			{
				return this.m_lensFlareGhostAmount;
			}
			set
			{
				this.m_lensFlareGhostAmount = value;
			}
		}

		public Vector4 LensFlareGhostsParams
		{
			get
			{
				return this.m_lensFlareGhostsParams;
			}
			set
			{
				this.m_lensFlareGhostsParams = value;
			}
		}

		public float LensFlareNormalizedGhostsIntensity
		{
			get
			{
				return this.m_normalizedGhostIntensity;
			}
			set
			{
				this.m_normalizedGhostIntensity = ((value < 0f) ? 0f : value);
				this.m_lensFlareGhostsParams.x = this.m_overallIntensity * this.m_normalizedGhostIntensity;
			}
		}

		public float LensFlareGhostsIntensity
		{
			get
			{
				return this.m_lensFlareGhostsParams.x;
			}
			set
			{
				this.m_lensFlareGhostsParams.x = ((value < 0f) ? 0f : value);
			}
		}

		public float LensFlareGhostsDispersal
		{
			get
			{
				return this.m_lensFlareGhostsParams.y;
			}
			set
			{
				this.m_lensFlareGhostsParams.y = value;
			}
		}

		public float LensFlareGhostsPowerFactor
		{
			get
			{
				return this.m_lensFlareGhostsParams.z;
			}
			set
			{
				this.m_lensFlareGhostsParams.z = value;
			}
		}

		public float LensFlareGhostsPowerFalloff
		{
			get
			{
				return this.m_lensFlareGhostsParams.w;
			}
			set
			{
				this.m_lensFlareGhostsParams.w = value;
			}
		}

		public Gradient LensFlareGradient
		{
			get
			{
				return this.m_lensGradient;
			}
			set
			{
				this.m_lensGradient = value;
			}
		}

		public Vector4 LensFlareHaloParams
		{
			get
			{
				return this.m_lensFlareHaloParams;
			}
			set
			{
				this.m_lensFlareHaloParams = value;
			}
		}

		public float LensFlareNormalizedHaloIntensity
		{
			get
			{
				return this.m_normalizedHaloIntensity;
			}
			set
			{
				this.m_normalizedHaloIntensity = ((value < 0f) ? 0f : value);
				this.m_lensFlareHaloParams.x = this.m_overallIntensity * this.m_normalizedHaloIntensity;
			}
		}

		public float LensFlareHaloIntensity
		{
			get
			{
				return this.m_lensFlareHaloParams.x;
			}
			set
			{
				this.m_lensFlareHaloParams.x = ((value < 0f) ? 0f : value);
			}
		}

		public float LensFlareHaloWidth
		{
			get
			{
				return this.m_lensFlareHaloParams.y;
			}
			set
			{
				this.m_lensFlareHaloParams.y = value;
			}
		}

		public float LensFlareHaloPowerFactor
		{
			get
			{
				return this.m_lensFlareHaloParams.z;
			}
			set
			{
				this.m_lensFlareHaloParams.z = value;
			}
		}

		public float LensFlareHaloPowerFalloff
		{
			get
			{
				return this.m_lensFlareHaloParams.w;
			}
			set
			{
				this.m_lensFlareHaloParams.w = value;
			}
		}

		public float LensFlareGhostChrDistortion
		{
			get
			{
				return this.m_lensFlareGhostChrDistortion;
			}
			set
			{
				this.m_lensFlareGhostChrDistortion = value;
			}
		}

		public float LensFlareHaloChrDistortion
		{
			get
			{
				return this.m_lensFlareHaloChrDistortion;
			}
			set
			{
				this.m_lensFlareHaloChrDistortion = value;
			}
		}

		public int LensFlareGaussianBlurAmount
		{
			get
			{
				return this.m_lensFlareGaussianBlurAmount;
			}
			set
			{
				this.m_lensFlareGaussianBlurAmount = value;
			}
		}

		public AmplifyLensFlare()
		{
			this.m_lensGradient = new Gradient();
			GradientColorKey[] array = new GradientColorKey[]
			{
				new GradientColorKey(Color.white, 0f),
				new GradientColorKey(Color.blue, 0.25f),
				new GradientColorKey(Color.green, 0.5f),
				new GradientColorKey(Color.yellow, 0.75f),
				new GradientColorKey(Color.red, 1f)
			};
			GradientAlphaKey[] array2 = new GradientAlphaKey[]
			{
				new GradientAlphaKey(1f, 0f),
				new GradientAlphaKey(1f, 0.25f),
				new GradientAlphaKey(1f, 0.5f),
				new GradientAlphaKey(1f, 0.75f),
				new GradientAlphaKey(1f, 1f)
			};
			this.m_lensGradient.SetKeys(array, array2);
		}

		public void Destroy()
		{
			if (this.m_lensFlareGradTexture != null)
			{
				UnityEngine.Object.DestroyImmediate(this.m_lensFlareGradTexture);
				this.m_lensFlareGradTexture = null;
			}
		}

		public void CreateLUTexture()
		{
			this.m_lensFlareGradTexture = new Texture2D(256, 1, (TextureFormat)5, false);
			this.m_lensFlareGradTexture.filterMode = (FilterMode)1;
			this.TextureFromGradient();
		}

		public RenderTexture ApplyFlare(Material material, RenderTexture source)
		{
			RenderTexture tempRenderTarget = AmplifyUtils.GetTempRenderTarget(source.width, source.height);
			material.SetVector(AmplifyUtils.LensFlareGhostsParamsId, this.m_lensFlareGhostsParams);
			material.SetTexture(AmplifyUtils.LensFlareLUTId, this.m_lensFlareGradTexture);
			material.SetVector(AmplifyUtils.LensFlareHaloParamsId, this.m_lensFlareHaloParams);
			material.SetFloat(AmplifyUtils.LensFlareGhostChrDistortionId, this.m_lensFlareGhostChrDistortion);
			material.SetFloat(AmplifyUtils.LensFlareHaloChrDistortionId, this.m_lensFlareHaloChrDistortion);
			Graphics.Blit(source, tempRenderTarget, material, 3 + this.m_lensFlareGhostAmount);
			return tempRenderTarget;
		}

		public void TextureFromGradient()
		{
			for (int i = 0; i < 256; i++)
			{
				this.m_lensFlareGradColor[i] = this.m_lensGradient.Evaluate((float)i / 255f);
			}
			this.m_lensFlareGradTexture.SetPixels(this.m_lensFlareGradColor);
			this.m_lensFlareGradTexture.Apply();
		}
	}
}