From 9b83409c71e13e3c3c9e88d42f07f7ca0456d1b4 Mon Sep 17 00:00:00 2001
From: Nico de Poel <ndepoel@gmail.com>
Date: Sat, 4 Mar 2023 12:15:37 +0100
Subject: [PATCH] Added debug checks for input and output resources, either
 through direct assignment or through existing global texture bindings.

---
 Assets/Scripts/Fsr2Context.cs | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Assets/Scripts/Fsr2Context.cs b/Assets/Scripts/Fsr2Context.cs
index 8bba114..399443e 100644
--- a/Assets/Scripts/Fsr2Context.cs
+++ b/Assets/Scripts/Fsr2Context.cs
@@ -367,6 +367,30 @@ namespace FidelityFX
 
         private void DebugCheckDispatch(Fsr2.DispatchDescription dispatchParams)
         {
+            // Global texture binding may happen as part of the command list, which is why we check these after running the process at least once
+            if (!_firstExecution)
+            {
+                if (!dispatchParams.Color.HasValue && Shader.GetGlobalTexture(Fsr2Pipeline.SrvInputColor) == null)
+                {
+                    Debug.LogError("Color resource is null");
+                }
+
+                if (!dispatchParams.Depth.HasValue && Shader.GetGlobalTexture(Fsr2Pipeline.SrvInputDepth) == null)
+                {
+                    Debug.LogError("Depth resource is null");
+                }
+
+                if (!dispatchParams.MotionVectors.HasValue && Shader.GetGlobalTexture(Fsr2Pipeline.SrvInputMotionVectors) == null)
+                {
+                    Debug.LogError("MotionVectors resource is null");
+                }
+                
+                if (!dispatchParams.Output.HasValue && Shader.GetGlobalTexture(Fsr2Pipeline.UavUpscaledOutput) == null)
+                {
+                    Debug.LogError("Output resource is null");
+                }
+            }
+
             if (dispatchParams.Exposure.HasValue && (_contextDescription.Flags & Fsr2.InitializationFlags.EnableAutoExposure) != 0)
             {
                 Debug.LogWarning("Exposure resource provided, however auto exposure flag is present");