using UnityEngine;
using UnityEngine.Rendering;
using UnityEngine.XR;

namespace LuxWater
{
	[RequireComponent(typeof(Camera))]
	[ExecuteInEditMode]
	public class LuxWater_ProjectorRenderer : MonoBehaviour
	{
		public enum BufferResolution
		{
			Full = 1,
			Half = 2,
			Quarter = 4,
			Eighth = 8
		}

		[Space(8f)]
		public BufferResolution FoamBufferResolution = BufferResolution.Full;

		public BufferResolution NormalBufferResolution = BufferResolution.Full;

		[Space(2f)]
		[Header("Debug")]
		[Space(4f)]
		public bool DebugFoamBuffer;

		public bool DebugNormalBuffer;

		public bool DebugStats;

		private int drawnFoamProjectors;

		private int drawnNormalProjectors;

		private static CommandBuffer cb_Foam;

		private static CommandBuffer cb_Normals;

		private Camera cam;

		private Transform camTransform;

		private RenderTexture ProjectedFoam;

		private RenderTexture ProjectedNormals;

		private Texture2D defaultBump;

		private Bounds tempBounds;

		private int _LuxWater_FoamOverlayPID;

		private int _LuxWater_NormalOverlayPID;

		private Plane[] frustumPlanes = new Plane[6];

		private Material DebugMat;

		private Material DebugNormalMat;

		private void OnEnable()
		{
			_LuxWater_FoamOverlayPID = Shader.PropertyToID("_LuxWater_FoamOverlay");
			_LuxWater_NormalOverlayPID = Shader.PropertyToID("_LuxWater_NormalOverlay");
			cb_Foam = new CommandBuffer();
			cb_Foam.name = "Lux Water: Foam Overlay Buffer";
			cb_Normals = new CommandBuffer();
			cb_Normals.name = "Lux Water: Normal Overlay Buffer";
			cam = GetComponent<Camera>();
			cam.AddCommandBuffer(CameraEvent.BeforeSkybox, cb_Foam);
			cam.AddCommandBuffer(CameraEvent.BeforeSkybox, cb_Normals);
		}

		private void OnDisable()
		{
			if (ProjectedFoam != null)
			{
				Object.DestroyImmediate(ProjectedFoam);
			}
			if (ProjectedNormals != null)
			{
				Object.DestroyImmediate(ProjectedNormals);
			}
			if (defaultBump != null)
			{
				Object.DestroyImmediate(defaultBump);
			}
			if (DebugMat != null)
			{
				Object.DestroyImmediate(DebugMat);
			}
			if (cb_Foam != null && cb_Foam.sizeInBytes > 0)
			{
				cb_Foam.Clear();
				cb_Foam.Dispose();
			}
			if (cb_Normals != null && cb_Normals.sizeInBytes > 0)
			{
				cb_Normals.Clear();
				cb_Normals.Dispose();
			}
			Shader.DisableKeyword("USINGWATERPROJECTORS");
		}

		private void OnPreCull()
		{
			cam = GetComponent<Camera>();
			int count = LuxWater_Projector.FoamProjectors.Count;
			int count2 = LuxWater_Projector.NormalProjectors.Count;
			if (count + count2 == 0)
			{
				if (cb_Foam != null)
				{
					cb_Foam.Clear();
				}
				if (cb_Normals != null)
				{
					cb_Normals.Clear();
				}
				Shader.DisableKeyword("USINGWATERPROJECTORS");
				return;
			}
			Shader.EnableKeyword("USINGWATERPROJECTORS");
			Matrix4x4 projectionMatrix = cam.projectionMatrix;
			Matrix4x4 worldToCameraMatrix = cam.worldToCameraMatrix;
			Matrix4x4 worldToProjectMatrix = projectionMatrix * worldToCameraMatrix;
			int pixelWidth = cam.pixelWidth;
			int pixelHeight = cam.pixelHeight;
			GeomUtil.CalculateFrustumPlanes(frustumPlanes, worldToProjectMatrix);
			int num = Mathf.FloorToInt(pixelWidth / (int)FoamBufferResolution);
			int height = Mathf.FloorToInt(pixelHeight / (int)FoamBufferResolution);
			bool flag = false;
			TextureDimension dimension = TextureDimension.Tex2D;
			if (cam.stereoEnabled && XRSettings.stereoRenderingMode == XRSettings.StereoRenderingMode.SinglePassInstanced)
			{
				flag = true;
				dimension = TextureDimension.Tex2DArray;
			}
			if (!ProjectedFoam)
			{
				ProjectedFoam = new RenderTexture(num, height, 0, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
				ProjectedFoam.dimension = dimension;
				if (flag)
				{
					ProjectedFoam.volumeDepth = 2;
				}
			}
			else if (ProjectedFoam.width != num)
			{
				Object.DestroyImmediate(ProjectedFoam);
				ProjectedFoam = new RenderTexture(num, height, 0, RenderTextureFormat.ARGB32, RenderTextureReadWrite.Linear);
				ProjectedFoam.dimension = dimension;
				if (flag)
				{
					ProjectedFoam.volumeDepth = 2;
				}
			}
			RenderTargetIdentifier renderTarget = ((!flag) ? new RenderTargetIdentifier(ProjectedFoam) : new RenderTargetIdentifier(ProjectedFoam, 0, CubemapFace.Unknown, -1));
			cb_Foam.Clear();
			cb_Foam.SetRenderTarget(renderTarget);
			cb_Foam.ClearRenderTarget(clearDepth: true, clearColor: true, new Color(0f, 0f, 0f, 0f), 1f);
			drawnFoamProjectors = 0;
			for (int i = 0; i < count; i++)
			{
				LuxWater_Projector luxWater_Projector = LuxWater_Projector.FoamProjectors[i];
				tempBounds = luxWater_Projector.m_Rend.bounds;
				if (GeometryUtility.TestPlanesAABB(frustumPlanes, tempBounds))
				{
					cb_Foam.DrawRenderer(luxWater_Projector.m_Rend, luxWater_Projector.m_Mat);
					drawnFoamProjectors++;
				}
			}
			Shader.SetGlobalTexture(_LuxWater_FoamOverlayPID, ProjectedFoam);
			num = Mathf.FloorToInt(pixelWidth / (int)NormalBufferResolution);
			height = Mathf.FloorToInt(pixelHeight / (int)NormalBufferResolution);
			if (!ProjectedNormals)
			{
				ProjectedNormals = new RenderTexture(num, height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear);
				ProjectedNormals.name = "ProjectedNormals";
				ProjectedNormals.dimension = dimension;
				if (flag)
				{
					ProjectedNormals.volumeDepth = 2;
				}
			}
			else if (ProjectedNormals.width != num)
			{
				Object.DestroyImmediate(ProjectedNormals);
				ProjectedNormals = new RenderTexture(num, height, 0, RenderTextureFormat.ARGBHalf, RenderTextureReadWrite.Linear);
				ProjectedNormals.name = "ProjectedNormals";
				ProjectedNormals.dimension = dimension;
				if (flag)
				{
					ProjectedNormals.volumeDepth = 2;
				}
			}
			RenderTargetIdentifier renderTarget2 = ((!flag) ? new RenderTargetIdentifier(ProjectedNormals) : new RenderTargetIdentifier(ProjectedNormals, 0, CubemapFace.Unknown, -1));
			cb_Normals.Clear();
			cb_Normals.SetRenderTarget(renderTarget2);
			cb_Normals.ClearRenderTarget(clearDepth: true, clearColor: true, new Color(0f, 0f, 0f, 0f), 1f);
			drawnNormalProjectors = 0;
			for (int j = 0; j < count2; j++)
			{
				LuxWater_Projector luxWater_Projector2 = LuxWater_Projector.NormalProjectors[j];
				tempBounds = luxWater_Projector2.m_Rend.bounds;
				if (GeometryUtility.TestPlanesAABB(frustumPlanes, tempBounds))
				{
					cb_Normals.DrawRenderer(luxWater_Projector2.m_Rend, luxWater_Projector2.m_Mat);
					drawnNormalProjectors++;
				}
			}
			Shader.SetGlobalTexture(_LuxWater_NormalOverlayPID, ProjectedNormals);
		}

		private void OnDrawGizmos()
		{
			Camera component = GetComponent<Camera>();
			int num = 0;
			int num2 = (int)(component.aspect * 128f);
			if (DebugMat == null)
			{
				DebugMat = new Material(Shader.Find("Hidden/LuxWater_Debug"));
			}
			if (DebugNormalMat == null)
			{
				DebugNormalMat = new Material(Shader.Find("Hidden/LuxWater_DebugNormals"));
			}
			if (DebugFoamBuffer)
			{
				if (ProjectedFoam == null)
				{
					return;
				}
				GL.PushMatrix();
				GL.LoadPixelMatrix(0f, Screen.width, Screen.height, 0f);
				Graphics.DrawTexture(new Rect(num, 0f, num2, 128f), ProjectedFoam, DebugMat);
				GL.PopMatrix();
				num = num2;
			}
			if (DebugNormalBuffer && !(ProjectedNormals == null))
			{
				GL.PushMatrix();
				GL.LoadPixelMatrix(0f, Screen.width, Screen.height, 0f);
				Graphics.DrawTexture(new Rect(num, 0f, num2, 128f), ProjectedNormals, DebugNormalMat);
				GL.PopMatrix();
			}
		}

		private void OnGUI()
		{
			if (DebugStats)
			{
				int count = LuxWater_Projector.FoamProjectors.Count;
				int count2 = LuxWater_Projector.NormalProjectors.Count;
				TextAnchor alignment = GUI.skin.label.alignment;
				GUI.skin.label.alignment = TextAnchor.MiddleLeft;
				GUI.Label(new Rect(10f, 0f, 300f, 40f), "Foam Projectors   [Registered] " + count + "  [Drawn] " + drawnFoamProjectors);
				GUI.Label(new Rect(10f, 18f, 300f, 40f), "Normal Projectors [Registered] " + count2 + "  [Drawn] " + drawnNormalProjectors);
				GUI.skin.label.alignment = alignment;
			}
		}
	}
}