using UnityEngine;

[AddComponentMenu("Image Effects/Lens Dirtiness")]
[ExecuteInEditMode]
[RequireComponent(typeof(Camera))]
public class LensDirtiness : MonoBehaviour
{
	private enum Pass
	{
		Threshold = 0,
		Kawase = 1,
		Compose = 2,
		Gaussian = 3
	}

	private Shader Shader_Dirtiness;

	private Material Material_Dirtiness;

	private int ScreenX = 1280;

	private int ScreenY = 720;

	public bool ShowScreenControls;

	public bool SceneTintsBloom = true;

	public Texture2D DirtinessTexture;

	public int Iterations = 4;

	public int Downsampling = 4;

	public float gain = 1f;

	public float threshold = 1f;

	public float BloomSize = 5f;

	public float Dirtiness = 1f;

	public float BloomIntensity = 1f;

	public Color BloomColor = Color.white;

	private void OnEnable()
	{
		Shader_Dirtiness = Shader.Find("Hidden/LensDirtiness");
		if (Shader_Dirtiness == null)
		{
			Debug.Log("#ERROR# Hidden/LensDirtiness Shader not found");
		}
		Material_Dirtiness = new Material(Shader_Dirtiness);
		Material_Dirtiness.hideFlags = HideFlags.HideAndDontSave;
		SetKeyword();
	}

	private void SetKeyword()
	{
		if ((bool)Material_Dirtiness)
		{
			if (SceneTintsBloom)
			{
				Material_Dirtiness.EnableKeyword("_SCENE_TINTS_BLOOM");
			}
			else
			{
				Material_Dirtiness.DisableKeyword("_SCENE_TINTS_BLOOM");
			}
		}
	}

	private void OnRenderImage(RenderTexture source, RenderTexture destination)
	{
		ScreenX = source.width;
		ScreenY = source.height;
		int num = ScreenX;
		int num2 = ScreenY;
		Material_Dirtiness.SetFloat("_Gain", gain);
		Material_Dirtiness.SetFloat("_Threshold", threshold);
		Material_Dirtiness.SetFloat("_BloomIntensity", BloomIntensity);
		RenderTexture renderTexture = RenderTexture.GetTemporary(ScreenX, ScreenY, 0, source.format);
		Graphics.Blit(source, renderTexture, Material_Dirtiness, 0);
		RenderTexture.ReleaseTemporary(renderTexture);
		Material_Dirtiness.SetVector("_Offset", new Vector4(1f / (float)ScreenX, 1f / (float)ScreenY, 0f, 0f));
		for (int i = 1; i <= Downsampling; i++)
		{
			num /= 2;
			num2 /= 2;
			RenderTexture renderTexture2 = RenderTexture.GetTemporary(num, num2, 0, source.format);
			Graphics.Blit(renderTexture, renderTexture2, Material_Dirtiness, 1);
			renderTexture = renderTexture2;
			for (int j = 1; j <= Iterations; j++)
			{
				float x = (BloomSize + (float)(j / Iterations)) / (float)ScreenX;
				float y = (BloomSize + (float)(j / Iterations)) / (float)ScreenY;
				RenderTexture temporary = RenderTexture.GetTemporary(num, num2, 0, source.format);
				Material_Dirtiness.SetVector("_Offset", new Vector4(0f, y, 0f, 0f));
				Graphics.Blit(renderTexture2, temporary, Material_Dirtiness, 3);
				RenderTexture.ReleaseTemporary(renderTexture2);
				renderTexture2 = temporary;
				temporary = RenderTexture.GetTemporary(num, num2, 0, source.format);
				Material_Dirtiness.SetVector("_Offset", new Vector4(x, 0f, 0f, 0f));
				Graphics.Blit(renderTexture2, temporary, Material_Dirtiness, 3);
				RenderTexture.ReleaseTemporary(renderTexture2);
				renderTexture2 = temporary;
			}
			RenderTexture.ReleaseTemporary(renderTexture2);
			Material_Dirtiness.SetTexture("_Bloom", renderTexture2);
		}
		Material_Dirtiness.SetFloat("_Dirtiness", Dirtiness);
		Material_Dirtiness.SetColor("_BloomColor", BloomColor);
		Material_Dirtiness.SetTexture("_DirtinessTexture", DirtinessTexture);
		Graphics.Blit(source, destination, Material_Dirtiness, 2);
	}

	private void OnGUI()
	{
		if (ShowScreenControls)
		{
			float x = 150f;
			GUI.Box(new Rect(15f, 15f, 250f, 200f), string.Empty);
			GUI.Label(new Rect(25f, 25f, 100f, 20f), "Gain= " + gain.ToString("0.0"));
			gain = GUI.HorizontalSlider(new Rect(x, 30f, 100f, 20f), gain, 0f, 10f);
			GUI.Label(new Rect(25f, 45f, 100f, 20f), "Threshold= " + threshold.ToString("0.0"));
			threshold = GUI.HorizontalSlider(new Rect(x, 50f, 100f, 20f), threshold, 0f, 10f);
			GUI.Label(new Rect(25f, 65f, 100f, 20f), "BloomSize= " + BloomSize.ToString("0.0"));
			BloomSize = GUI.HorizontalSlider(new Rect(x, 70f, 100f, 20f), BloomSize, 0f, 10f);
			GUI.Label(new Rect(25f, 85f, 100f, 20f), "Dirtiness= " + Dirtiness.ToString("0.0"));
			Dirtiness = GUI.HorizontalSlider(new Rect(x, 90f, 100f, 20f), Dirtiness, 0f, 10f);
			GUI.Label(new Rect(25f, 125f, 100f, 20f), "R= " + (BloomColor.r * 255f).ToString("0."));
			GUI.color = new Color(BloomColor.r, 0f, 0f);
			BloomColor.r = GUI.HorizontalSlider(new Rect(x, 130f, 100f, 20f), BloomColor.r, 0f, 1f);
			GUI.color = Color.white;
			GUI.Label(new Rect(25f, 145f, 100f, 20f), "G= " + (BloomColor.g * 255f).ToString("0."));
			GUI.color = new Color(0f, BloomColor.g, 0f);
			BloomColor.g = GUI.HorizontalSlider(new Rect(x, 150f, 100f, 20f), BloomColor.g, 0f, 1f);
			GUI.color = Color.white;
			GUI.Label(new Rect(25f, 165f, 100f, 20f), "R= " + (BloomColor.b * 255f).ToString("0."));
			GUI.color = new Color(0f, 0f, BloomColor.b);
			BloomColor.b = GUI.HorizontalSlider(new Rect(x, 170f, 100f, 20f), BloomColor.b, 0f, 1f);
			GUI.color = Color.white;
		}
	}
}