First working proof of concept of FSR3 upscaling in Unity

Assets/Scripts/Core/Fsr2.cs

@@ -63,6 +63,8 @@ namespace FidelityFX
         {
             switch (qualityMode)
             {
+                case QualityMode.NativeAA:
+                    return 1.0f;
                 case QualityMode.UltraQuality:
                     return 1.2f;
                 case QualityMode.Quality:
@@ -134,11 +136,12 @@ namespace FidelityFX
         
         public enum QualityMode
         {
-            UltraQuality = 0,
-            Quality = 1,
-            Balanced = 2,
-            Performance = 3,
-            UltraPerformance = 4,
+            NativeAA = 0,
+            UltraQuality = 1,   // TODO: UltraQuality may become obsolete, and NativeAA can replace it at position 0
+            Quality = 2,
+            Balanced = 3,
+            Performance = 4,
+            UltraPerformance = 5,
         }
 
         [Flags]

Assets/Scripts/Core/Fsr2Pass.cs

@@ -85,18 +85,18 @@ namespace FidelityFX
             bool supportedFP16 = ((flags & Fsr2.InitializationFlags.EnableFP16Usage) != 0 && AllowFP16);
 
             // This matches the permutation rules from the CreatePipeline* functions
-            if ((flags & Fsr2.InitializationFlags.EnableHighDynamicRange) != 0) shaderRef.EnableKeyword("FFX_FSR2_OPTION_HDR_COLOR_INPUT");
-            if ((flags & Fsr2.InitializationFlags.EnableDisplayResolutionMotionVectors) == 0) shaderRef.EnableKeyword("FFX_FSR2_OPTION_LOW_RESOLUTION_MOTION_VECTORS");
-            if ((flags & Fsr2.InitializationFlags.EnableMotionVectorsJitterCancellation) != 0) shaderRef.EnableKeyword("FFX_FSR2_OPTION_JITTERED_MOTION_VECTORS");
-            if ((flags & Fsr2.InitializationFlags.EnableDepthInverted) != 0) shaderRef.EnableKeyword("FFX_FSR2_OPTION_INVERTED_DEPTH");
-            if (useLut) shaderRef.EnableKeyword("FFX_FSR2_OPTION_REPROJECT_USE_LANCZOS_TYPE");
+            if ((flags & Fsr2.InitializationFlags.EnableHighDynamicRange) != 0) shaderRef.EnableKeyword("FFX_FSR3UPSCALER_OPTION_HDR_COLOR_INPUT");
+            if ((flags & Fsr2.InitializationFlags.EnableDisplayResolutionMotionVectors) == 0) shaderRef.EnableKeyword("FFX_FSR3UPSCALER_OPTION_LOW_RESOLUTION_MOTION_VECTORS");
+            if ((flags & Fsr2.InitializationFlags.EnableMotionVectorsJitterCancellation) != 0) shaderRef.EnableKeyword("FFX_FSR3UPSCALER_OPTION_JITTERED_MOTION_VECTORS");
+            if ((flags & Fsr2.InitializationFlags.EnableDepthInverted) != 0) shaderRef.EnableKeyword("FFX_FSR3UPSCALER_OPTION_INVERTED_DEPTH");
+            if (useLut) shaderRef.EnableKeyword("FFX_FSR3UPSCALER_OPTION_REPROJECT_USE_LANCZOS_TYPE");
             if (supportedFP16) shaderRef.EnableKeyword("FFX_HALF");
 
             // Inform the shader which render pipeline we're currently using
             var pipeline = GraphicsSettings.currentRenderPipeline;
             if (pipeline != null && pipeline.GetType().Name.Contains("HDRenderPipeline"))
             {
-                shaderRef.EnableKeyword("UNITY_FSR2_HDRP");
+                shaderRef.EnableKeyword("UNITY_FSR3UPSCALER_HDRP");
             }
         }
 
@@ -124,7 +124,7 @@ namespace FidelityFX
         {
             _spdConstants = spdConstants;
             
-            LoadComputeShader("FSR2/ffx_fsr2_compute_luminance_pyramid_pass");
+            LoadComputeShader("FSR3/ffx_fsr3upscaler_compute_luminance_pyramid_pass");
         }
 
         public override void ScheduleDispatch(CommandBuffer commandBuffer, Fsr2.DispatchDescription dispatchParams, int frameIndex, int dispatchX, int dispatchY)
@@ -149,7 +149,7 @@ namespace FidelityFX
         public Fsr2ReconstructPreviousDepthPass(Fsr2.ContextDescription contextDescription, Fsr2Resources resources, ComputeBuffer constants)
             : base(contextDescription, resources, constants)
         {
-            LoadComputeShader("FSR2/ffx_fsr2_reconstruct_previous_depth_pass");
+            LoadComputeShader("FSR3/ffx_fsr3upscaler_reconstruct_previous_depth_pass");
         }
 
         public override void ScheduleDispatch(CommandBuffer commandBuffer, Fsr2.DispatchDescription dispatchParams, int frameIndex, int dispatchX, int dispatchY)
@@ -177,7 +177,7 @@ namespace FidelityFX
         public Fsr2DepthClipPass(Fsr2.ContextDescription contextDescription, Fsr2Resources resources, ComputeBuffer constants)
             : base(contextDescription, resources, constants)
         {
-            LoadComputeShader("FSR2/ffx_fsr2_depth_clip_pass");
+            LoadComputeShader("FSR3/ffx_fsr3upscaler_depth_clip_pass");
         }
 
         public override void ScheduleDispatch(CommandBuffer commandBuffer, Fsr2.DispatchDescription dispatchParams, int frameIndex, int dispatchX, int dispatchY)
@@ -212,7 +212,7 @@ namespace FidelityFX
         public Fsr2LockPass(Fsr2.ContextDescription contextDescription, Fsr2Resources resources, ComputeBuffer constants)
             : base(contextDescription, resources, constants)
         {
-            LoadComputeShader("FSR2/ffx_fsr2_lock_pass");
+            LoadComputeShader("FSR3/ffx_fsr3upscaler_lock_pass");
         }
 
         public override void ScheduleDispatch(CommandBuffer commandBuffer, Fsr2.DispatchDescription dispatchParams, int frameIndex, int dispatchX, int dispatchY)
@@ -226,7 +226,7 @@ namespace FidelityFX
     
     internal class Fsr2AccumulatePass : Fsr2Pass
     {
-        private const string SharpeningKeyword = "FFX_FSR2_OPTION_APPLY_SHARPENING";
+        private const string SharpeningKeyword = "FFX_FSR3UPSCALER_OPTION_APPLY_SHARPENING";
         
         // Workaround: Disable FP16 path for the accumulate pass on NVIDIA due to reduced occupancy and high VRAM throughput.
         protected override bool AllowFP16 => SystemInfo.graphicsDeviceVendorID != 0x10DE;
@@ -238,7 +238,7 @@ namespace FidelityFX
         public Fsr2AccumulatePass(Fsr2.ContextDescription contextDescription, Fsr2Resources resources, ComputeBuffer constants)
             : base(contextDescription, resources, constants)
         {
-            LoadComputeShader("FSR2/ffx_fsr2_accumulate_pass");
+            LoadComputeShader("FSR3/ffx_fsr3upscaler_accumulate_pass");
 #if UNITY_2021_2_OR_NEWER
             _sharpeningKeyword = new LocalKeyword(ComputeShader, SharpeningKeyword);
 #endif
@@ -303,7 +303,7 @@ namespace FidelityFX
         {
             _rcasConstants = rcasConstants;
             
-            LoadComputeShader("FSR2/ffx_fsr2_rcas_pass");
+            LoadComputeShader("FSR3/ffx_fsr3upscaler_rcas_pass");
         }
 
         public override void ScheduleDispatch(CommandBuffer commandBuffer, Fsr2.DispatchDescription dispatchParams, int frameIndex, int dispatchX, int dispatchY)
@@ -331,7 +331,7 @@ namespace FidelityFX
         {
             _generateReactiveConstants = generateReactiveConstants;
             
-            LoadComputeShader("FSR2/ffx_fsr2_autogen_reactive_pass");
+            LoadComputeShader("FSR3/ffx_fsr3upscaler_autogen_reactive_pass");
         }
 
         public override void ScheduleDispatch(CommandBuffer commandBuffer, Fsr2.DispatchDescription dispatchParams, int frameIndex, int dispatchX, int dispatchY)
@@ -354,7 +354,7 @@ namespace FidelityFX
         }
     }
 
-    internal class Fsr2TcrAutogeneratePass : Fsr2Pass
+    internal class Fsr2TcrAutogeneratePass : Fsr2Pass   // TODO: where did this pass go in FSR3?
     {
         private readonly ComputeBuffer _tcrAutogenerateConstants;
 

Assets/Scripts/Core/Fsr2ShaderIDs.cs

@@ -36,7 +36,7 @@ namespace FidelityFX
         internal static readonly int SrvReconstructedPrevNearestDepth = Shader.PropertyToID("r_reconstructed_previous_nearest_depth");
         internal static readonly int SrvDilatedMotionVectors = Shader.PropertyToID("r_dilated_motion_vectors");
         internal static readonly int SrvPrevDilatedMotionVectors = Shader.PropertyToID("r_previous_dilated_motion_vectors");
-        internal static readonly int SrvDilatedDepth = Shader.PropertyToID("r_dilatedDepth");
+        internal static readonly int SrvDilatedDepth = Shader.PropertyToID("r_dilated_depth");
         internal static readonly int SrvInternalUpscaled = Shader.PropertyToID("r_internal_upscaled_color");
         internal static readonly int SrvLockStatus = Shader.PropertyToID("r_lock_status");
         internal static readonly int SrvLockInputLuma = Shader.PropertyToID("r_lock_input_luma");
@@ -53,7 +53,7 @@ namespace FidelityFX
         // Unordered access views, i.e. random read/write bindings
         internal static readonly int UavReconstructedPrevNearestDepth = Shader.PropertyToID("rw_reconstructed_previous_nearest_depth");
         internal static readonly int UavDilatedMotionVectors = Shader.PropertyToID("rw_dilated_motion_vectors");
-        internal static readonly int UavDilatedDepth = Shader.PropertyToID("rw_dilatedDepth");
+        internal static readonly int UavDilatedDepth = Shader.PropertyToID("rw_dilated_depth");
         internal static readonly int UavInternalUpscaled = Shader.PropertyToID("rw_internal_upscaled_color");
         internal static readonly int UavLockStatus = Shader.PropertyToID("rw_lock_status");
         internal static readonly int UavLockInputLuma = Shader.PropertyToID("rw_lock_input_luma");
@@ -72,7 +72,7 @@ namespace FidelityFX
         internal static readonly int UavPrevColorPostAlpha = Shader.PropertyToID("rw_output_prev_color_post_alpha");
 
         // Constant buffer bindings
-        internal static readonly int CbFsr2 = Shader.PropertyToID("cbFSR2");
+        internal static readonly int CbFsr2 = Shader.PropertyToID("cbFSR3Upscaler");
         internal static readonly int CbSpd = Shader.PropertyToID("cbSPD");
         internal static readonly int CbRcas = Shader.PropertyToID("cbRCAS");
         internal static readonly int CbGenReactive = Shader.PropertyToID("cbGenerateReactive");

Assets/Scripts/Debug/DebugDumper.cs

@@ -113,7 +113,7 @@ public class DebugDumper : MonoBehaviour
             GUI.matrix = Matrix4x4.Scale(new Vector3(scale, scale, scale));
         }
         
-        GUILayout.Label($"FSR2: {(_fsr.enabled ? "Enabled" : "Disabled")}");
+        GUILayout.Label($"FSR3 Upscaler: {(_fsr.enabled ? "Enabled" : "Disabled")}");
         GUILayout.Label($"Quality: {_fsr.qualityMode}");
         GUILayout.Label($"Auto-exposure: {(_fsr.enableAutoExposure ? "Enabled" : "Disabled")}");
         GUILayout.Label($"Scale: {_scaleFactor:0.00}");