Reworked creation and dispatch to use description classes to pass parameters, designed similar to how the original FSR2 library does things, but adapted slightly to fit the Unity context.

Assets/Scripts/Fsr2.cs

@@ -6,7 +6,7 @@ namespace FidelityFX
     public static class Fsr2
     {
         // Allow overriding of certain Unity resource management behaviors by the programmer 
-        public static Fsr2Callbacks Callbacks { get; set; } = new Fsr2Callbacks();
+        public static Fsr2Callbacks GlobalCallbacks { get; set; } = new Fsr2Callbacks();
         
         public enum QualityMode
         {
@@ -17,7 +17,7 @@ namespace FidelityFX
         }
 
         [Flags]
-        public enum InitializationFlagBits
+        public enum InitializationFlags
         {
             EnableHighDynamicRange = 1 << 0,
             EnableDisplayResolutionMotionVectors = 1 << 1,
@@ -29,10 +29,51 @@ namespace FidelityFX
             EnableTexture1DUsage = 1 << 7,
         }
 
-        public static Fsr2Context CreateContext()
+        public class ContextDescription
         {
+            public InitializationFlags Flags;
+            public Vector2Int MaxRenderSize;
+            public Vector2Int DisplaySize;
+            public Fsr2Callbacks Callbacks;
+        }
+
+        public class DispatchDescription
+        {
+            // Texture2D Color, Depth, MotionVectors;  // Will be passed using ComputeShader.SetTextureFromGlobal
+            public Texture2D Exposure;
+            public Texture2D Reactive;
+            public Texture2D TransparencyAndComposition;
+            public RenderTexture Input;
+            public RenderTexture Output;
+            public Vector2 JitterOffset;
+            public Vector2 MotionVectorScale;
+            public Vector2Int RenderSize;
+            public bool EnableSharpening;
+            public float Sharpness;
+            public float FrameTimeDelta;
+            public float PreExposure;
+            public bool Reset;
+            public float CameraNear;
+            public float CameraFar;
+            public float CameraFovAngleVertical;
+        }
+
+        /// <summary>
+        /// Creates a new FSR2 context with standard parameters that are appropriate for the current platform. 
+        /// </summary>
+        public static Fsr2Context CreateContext(InitializationFlags flags = 0)
+        {
+            // flags |= InitializationFlags.EnableDepthInverted;   // Depends on the runtime platform
+            
+            var contextDescription = new ContextDescription
+            {
+                Flags = flags,
+                DisplaySize = new Vector2Int(Screen.width, Screen.height),
+                Callbacks = GlobalCallbacks,
+            };
+            
             var context = new Fsr2Context();
-            context.Create(Callbacks);
+            context.Create(contextDescription);
             return context;
         }
 

Assets/Scripts/Fsr2Callbacks.cs

@@ -6,11 +6,7 @@ namespace FidelityFX
     {
         public virtual Shader LoadShader(string name)
         {
-#if UNITY_EDITOR
-            return Shader.Find(name);
-#else
             return Resources.Load<Shader>(name);
-#endif
         }
 
         public virtual ComputeShader LoadComputeShader(string name)

Assets/Scripts/Fsr2Context.cs

@@ -7,6 +7,8 @@ namespace FidelityFX
 {
     public class Fsr2Context
     {
+        private Fsr2.ContextDescription _contextDescription;
+        
         private ComputeShader _rcasComputeShader;
         
         private ComputeBuffer _fsr2ConstantsBuffer;
@@ -18,32 +20,34 @@ namespace FidelityFX
         private ComputeBuffer _rcasConstantsBuffer;
         private readonly RcasConstants[] _rcasConstantsArray = new RcasConstants[1];
 
-        public void Create(Fsr2Callbacks callbacks)
+        public void Create(Fsr2.ContextDescription contextDescription)
         {
+            _contextDescription = contextDescription;
+            
             if (_rcasComputeShader == null)
-                _rcasComputeShader = callbacks.LoadComputeShader("FSR2/ffx_fsr2_rcas_pass");
+                _rcasComputeShader = _contextDescription.Callbacks.LoadComputeShader("FSR2/ffx_fsr2_rcas_pass");
             
             _fsr2ConstantsBuffer = new ComputeBuffer(1, Marshal.SizeOf<Fsr2Constants>(), ComputeBufferType.Constant);
             _spdConstantsBuffer = new ComputeBuffer(1, Marshal.SizeOf<SpdConstants>(), ComputeBufferType.Constant);
             _rcasConstantsBuffer = new ComputeBuffer(1, Marshal.SizeOf<RcasConstants>(), ComputeBufferType.Constant);
         }
         
-        public void Dispatch(RenderTexture src, RenderTexture dest, Texture2D exposure, bool enableSharpening, float sharpness) // TODO: collect parameters into a single object
+        public void Dispatch(Fsr2.DispatchDescription dispatchDescription)
         {
-            _fsr2ConstantsArray[0].preExposure = 1.0f;
+            _fsr2ConstantsArray[0].preExposure = dispatchDescription.PreExposure;
             _fsr2ConstantsBuffer.SetData(_fsr2ConstantsArray);
 
-            if (enableSharpening)
+            if (dispatchDescription.EnableSharpening)
             {
-                int sharpnessIndex = Mathf.RoundToInt(Mathf.Clamp01(sharpness) * (RcasConfigs.Count - 1));
+                int sharpnessIndex = Mathf.RoundToInt(Mathf.Clamp01(dispatchDescription.Sharpness) * (RcasConfigs.Count - 1));
                 _rcasConstantsArray[0] = RcasConfigs[sharpnessIndex];
                 _rcasConstantsBuffer.SetData(_rcasConstantsArray);
             
                 // Run the RCAS sharpening filter on the upscaled image
                 int rcasKernel = _rcasComputeShader.FindKernel("CS");
-                _rcasComputeShader.SetTexture(rcasKernel, "r_exposure", exposure);
-                _rcasComputeShader.SetTexture(rcasKernel, "r_rcas_input", src);
-                _rcasComputeShader.SetTexture(rcasKernel, "rw_upscaled_output", dest);
+                _rcasComputeShader.SetTexture(rcasKernel, "r_exposure", dispatchDescription.Exposure);
+                _rcasComputeShader.SetTexture(rcasKernel, "r_rcas_input", dispatchDescription.Input);
+                _rcasComputeShader.SetTexture(rcasKernel, "rw_upscaled_output", dispatchDescription.Output);
                 _rcasComputeShader.SetConstantBuffer("cbFSR2", _fsr2ConstantsBuffer, 0, Marshal.SizeOf<Fsr2Constants>());
                 _rcasComputeShader.SetConstantBuffer("cbRCAS", _rcasConstantsBuffer, 0, Marshal.SizeOf<RcasConstants>());
 
@@ -55,7 +59,7 @@ namespace FidelityFX
             }
             else
             {
-                Graphics.Blit(src, dest);
+                Graphics.Blit(dispatchDescription.Input, dispatchDescription.Output);
             }
         }
 

Assets/Scripts/Fsr2Controller.cs

@@ -2,9 +2,7 @@ using System;
 using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
-using System.Runtime.InteropServices;
 using FidelityFX;
-using UnityEditor;
 using UnityEngine;
 using UnityEngine.Rendering;
 
@@ -31,9 +29,10 @@ public class Fsr2Controller : MonoBehaviour
     public float renderScale;
 
     private Fsr2Context _context;
+    private readonly Fsr2.DispatchDescription _dispatchDescription = new Fsr2.DispatchDescription();
 
     private RenderTexture _upscaleRT;
-    private RenderTexture _rcasOutput;
+    private RenderTexture _outputRT;
     private Texture2D _exposure;
     
     private Material _testMaterial;
@@ -43,7 +42,7 @@ public class Fsr2Controller : MonoBehaviour
         {
             if (_testMaterial == null)
             {
-                var testShader = Fsr2.Callbacks.LoadShader("FSR2/FSRTest");
+                var testShader = Fsr2.GlobalCallbacks.LoadShader("Shaders/FSRTest");
                 _testMaterial = new Material(testShader);
             }
 
@@ -60,9 +59,9 @@ public class Fsr2Controller : MonoBehaviour
         _upscaleRT = new RenderTexture(Screen.width, Screen.height, 24, RenderTextureFormat.ARGBHalf);
         _upscaleRT.Create();
 
-        _rcasOutput = new RenderTexture(Screen.width, Screen.height, 24, RenderTextureFormat.ARGBHalf);
-        _rcasOutput.enableRandomWrite = true;
-        _rcasOutput.Create();
+        _outputRT = new RenderTexture(Screen.width, Screen.height, 24, RenderTextureFormat.ARGBHalf);
+        _outputRT.enableRandomWrite = true;
+        _outputRT.Create();
 
         _exposure = new Texture2D(1, 1);
         _exposure.name = "FSR2 Exposure";
@@ -78,10 +77,10 @@ public class Fsr2Controller : MonoBehaviour
             _exposure = null;
         }
 
-        if (_rcasOutput != null)
+        if (_outputRT != null)
         {
-            _rcasOutput.Release();
-            _rcasOutput = null;
+            _outputRT.Release();
+            _outputRT = null;
         }
 
         if (_upscaleRT != null)
@@ -111,9 +110,22 @@ public class Fsr2Controller : MonoBehaviour
         // Do a dumb upscale first
         Graphics.Blit(gameCamera.targetTexture, _upscaleRT, TestMaterial);
 
-        _context.Dispatch(_upscaleRT, _rcasOutput, _exposure, performSharpenPass, sharpness);
+        _dispatchDescription.Input = _upscaleRT;
+        _dispatchDescription.Output = _outputRT;
+        _dispatchDescription.Exposure = _exposure;
+        _dispatchDescription.PreExposure = 1.0f;
+        _dispatchDescription.EnableSharpening = performSharpenPass;
+        _dispatchDescription.Sharpness = sharpness;
+        _dispatchDescription.MotionVectorScale.x = gameCamera.pixelWidth;
+        _dispatchDescription.MotionVectorScale.y = gameCamera.pixelHeight;
+        _dispatchDescription.FrameTimeDelta = Time.unscaledDeltaTime;
+        _dispatchDescription.CameraNear = gameCamera.nearClipPlane;
+        _dispatchDescription.CameraFar = gameCamera.farClipPlane;
+        _dispatchDescription.CameraFovAngleVertical = gameCamera.fieldOfView * Mathf.Deg2Rad;
+
+        _context.Dispatch(_dispatchDescription);
         
         // Output sharpened image to screen
-        Graphics.Blit(_rcasOutput, dest);
+        Graphics.Blit(_outputRT, dest);
     }
 }

Assets/Scripts/SubsampleTest.cs

@@ -62,13 +62,13 @@ public class SubsampleTest : MonoBehaviour
         // Adjust texture mipmap LOD bias by log2(renderResolution/displayResolution) - 1.0;
         // May need to leave this to the game dev, as we don't know which textures do and don't belong to the 3D scene
         float biasOffset = GetMipmapBiasOffset();
-        Fsr2.Callbacks.ApplyMipmapBias(biasOffset);
+        Fsr2.GlobalCallbacks.ApplyMipmapBias(biasOffset);
     }
 
     private void OnDisable()
     {
         float biasOffset = GetMipmapBiasOffset();
-        Fsr2.Callbacks.ApplyMipmapBias(-biasOffset);
+        Fsr2.GlobalCallbacks.ApplyMipmapBias(-biasOffset);
         
         gameCamera.targetTexture.Release();
         gameCamera.targetTexture = null;