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Assets/CapturePanorama/Scripts/ImageEffectCopyCamera.cs

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+// This is free and unencumbered software released into the public domain.
+// For more information, please refer to <http://unlicense.org/>
+
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using UnityEngine;
+
+namespace CapturePanorama.Internals
+{
+    class ImageEffectCopyCamera : MonoBehaviour
+    {
+        public struct InstanceMethodPair {
+            public object Instance;
+            public MethodInfo Method;
+        }
+        public List<InstanceMethodPair> onRenderImageMethods = new List<InstanceMethodPair>();
+
+        public static List<InstanceMethodPair> GenerateMethodList(Camera camToCopy)
+        {
+            var result = new List<InstanceMethodPair>();
+            foreach (var script in camToCopy.gameObject.GetComponents<MonoBehaviour>())
+            {
+                if (script.enabled)
+                {
+                    Type scriptType = script.GetType();
+                    MethodInfo m = scriptType.GetMethod("OnRenderImage",
+                        BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null,
+                        new Type[] { typeof(RenderTexture), typeof(RenderTexture) }, null);
+                    if (m != null)
+                    {
+                        InstanceMethodPair pair = new InstanceMethodPair();
+                        pair.Instance = script;
+                        pair.Method = m;
+                        result.Add(pair);
+                    }
+                }
+            }
+            return result;
+        }
+
+        RenderTexture[] temp = new RenderTexture[] { null, null };
+
+        void OnDestroy()
+        {
+            for (int i = 0; i < temp.Length; i++)
+            {
+                if (temp[i] != null)
+                    Destroy(temp[i]);
+                temp[i] = null;
+            }
+        }
+
+        void OnRenderImage(RenderTexture src, RenderTexture dest)
+        {
+            int desiredDepth = Math.Max(src.depth, dest.depth);
+
+            for (int i = 0; i < temp.Length; i++)
+            {
+                if (onRenderImageMethods.Count > i + 1)
+                {
+                    if (temp[i] != null &&
+                        (temp[i].width != dest.width || temp[i].height != dest.height || temp[i].depth != desiredDepth || temp[i].format != dest.format))
+                    {
+                        Destroy(temp[i]);
+                        temp[i] = null;
+                    }
+                    if (temp[i] == null)
+                        temp[i] = new RenderTexture(dest.width, dest.height, desiredDepth, dest.format);
+                }
+            }
+
+            var sequence = new List<RenderTexture>();
+            sequence.Add(src);
+            for (int i = 0; i < onRenderImageMethods.Count - 1; i++)
+                sequence.Add(i % 2 == 0 ? temp[0] : temp[1]);
+            sequence.Add(dest);
+
+            for (int i = 0; i < onRenderImageMethods.Count; i++)
+                onRenderImageMethods[i].Method.Invoke(onRenderImageMethods[i].Instance, new object[] { sequence[i], sequence[i + 1] });
+        }
+    }
+}