Added support for dynamic resolution scaling using ScalableBufferManager.

Assets/Scenes/SampleScene.unity

@@ -284,7 +284,7 @@ Camera:
   m_TargetEye: 3
   m_HDR: 1
   m_AllowMSAA: 0
-  m_AllowDynamicResolution: 0
+  m_AllowDynamicResolution: 1
   m_ForceIntoRT: 0
   m_OcclusionCulling: 1
   m_StereoConvergence: 10

Assets/Scripts/Debug/DebugDumper.cs

@@ -30,6 +30,9 @@ using UnityEngine;
 public class DebugDumper : MonoBehaviour
 {
     private Fsr2ImageEffect _fsr;
+
+    private float _scaleFactor = 1.0f;
+    private float _lastScaleTime = 0f;
     
     void Start()
     {
@@ -42,6 +45,8 @@ public class DebugDumper : MonoBehaviour
         Debug.Log(sb);
 
         _fsr = GetComponent<Fsr2ImageEffect>();
+
+        ScalableBufferManager.ResizeBuffers(_scaleFactor, _scaleFactor);
     }
 
     void Update()
@@ -77,6 +82,16 @@ public class DebugDumper : MonoBehaviour
         {
             _fsr.ResetHistory();
         }
+
+        float vertical = Input.GetAxis("Vertical");
+        if (vertical is < -0.3f or > 0.3f && Time.realtimeSinceStartup > _lastScaleTime + 0.5f)
+        {
+            _scaleFactor += 0.1f * Math.Sign(vertical);
+            _scaleFactor = Mathf.Clamp(_scaleFactor, 0.1f, 1.0f);
+
+            ScalableBufferManager.ResizeBuffers(_scaleFactor, _scaleFactor);
+            _lastScaleTime = Time.realtimeSinceStartup;
+        }
     }
 
     private void OnGUI()
@@ -93,6 +108,7 @@ public class DebugDumper : MonoBehaviour
         GUILayout.Label($"FSR2: {(_fsr.enabled ? "Enabled" : "Disabled")}");
         GUILayout.Label($"Quality: {_fsr.qualityMode}");
         GUILayout.Label($"Auto-exposure: {(_fsr.enableAutoExposure ? "Enabled" : "Disabled")}");
+        GUILayout.Label($"Scale: {_scaleFactor:0.00}");
         if (Input.GetButton("Jump"))
         {
             GUILayout.Label("Reset");

Assets/Scripts/Fsr2ImageEffect.cs

@@ -186,6 +186,7 @@ namespace FidelityFX
             if (_renderCamera.allowHDR) flags |= Fsr2.InitializationFlags.EnableHighDynamicRange;
             if (enableFP16) flags |= Fsr2.InitializationFlags.EnableFP16Usage;
             if (enableAutoExposure) flags |= Fsr2.InitializationFlags.EnableAutoExposure;
+            if (UsingDynamicResolution()) flags |= Fsr2.InitializationFlags.EnableDynamicResolution;
 
             _context = Fsr2.CreateContext(_displaySize, _renderSize, Callbacks, flags);
 
@@ -292,7 +293,8 @@ namespace FidelityFX
             _opaqueInputCommandBuffer.Clear();
             if (autoGenerateReactiveMask || autoGenerateTransparencyAndComposition)
             {
-                _colorOpaqueOnly = RenderTexture.GetTemporary(_renderSize.x, _renderSize.y, 0, GetDefaultFormat());
+                var scaledRenderSize = GetScaledRenderSize();
+                _colorOpaqueOnly = RenderTexture.GetTemporary(scaledRenderSize.x, scaledRenderSize.y, 0, GetDefaultFormat());
                 _opaqueInputCommandBuffer.Blit(BuiltinRenderTextureType.CameraTarget, _colorOpaqueOnly);
             }
 
@@ -320,14 +322,16 @@ namespace FidelityFX
             if (!enableAutoExposure && exposure != null) _dispatchDescription.Exposure = exposure;
             if (reactiveMask != null) _dispatchDescription.Reactive = reactiveMask;
             if (transparencyAndCompositionMask != null) _dispatchDescription.TransparencyAndComposition = transparencyAndCompositionMask;
+
+            var scaledRenderSize = GetScaledRenderSize();
             
             _dispatchDescription.Output = null;
             _dispatchDescription.PreExposure = preExposure;
             _dispatchDescription.EnableSharpening = performSharpenPass;
             _dispatchDescription.Sharpness = sharpness;
-            _dispatchDescription.MotionVectorScale.x = -_renderSize.x;
-            _dispatchDescription.MotionVectorScale.y = -_renderSize.y;
-            _dispatchDescription.RenderSize = _renderSize;
+            _dispatchDescription.MotionVectorScale.x = -scaledRenderSize.x;
+            _dispatchDescription.MotionVectorScale.y = -scaledRenderSize.y;
+            _dispatchDescription.RenderSize = scaledRenderSize;
             _dispatchDescription.FrameTimeDelta = Time.unscaledDeltaTime;
             _dispatchDescription.CameraNear = _renderCamera.nearClipPlane;
             _dispatchDescription.CameraFar = _renderCamera.farClipPlane;
@@ -360,7 +364,7 @@ namespace FidelityFX
             _genReactiveDescription.ColorOpaqueOnly = _colorOpaqueOnly;
             _genReactiveDescription.ColorPreUpscale = null;
             _genReactiveDescription.OutReactive = null;
-            _genReactiveDescription.RenderSize = _renderSize;
+            _genReactiveDescription.RenderSize = GetScaledRenderSize();
             _genReactiveDescription.Scale = generateReactiveParameters.scale;
             _genReactiveDescription.CutoffThreshold = generateReactiveParameters.cutoffThreshold;
             _genReactiveDescription.BinaryValue = generateReactiveParameters.binaryValue;
@@ -369,14 +373,16 @@ namespace FidelityFX
 
         private void ApplyJitter()
         {
+            var scaledRenderSize = GetScaledRenderSize();
+            
             // Perform custom jittering of the camera's projection matrix according to FSR2's recipe
-            int jitterPhaseCount = Fsr2.GetJitterPhaseCount(_renderSize.x, _displaySize.x);
+            int jitterPhaseCount = Fsr2.GetJitterPhaseCount(scaledRenderSize.x, _displaySize.x);
             Fsr2.GetJitterOffset(out float jitterX, out float jitterY, Time.frameCount, jitterPhaseCount);
 
             _dispatchDescription.JitterOffset = new Vector2(jitterX, jitterY);
 
-            jitterX = 2.0f * jitterX / _renderSize.x;
-            jitterY = 2.0f * jitterY / _renderSize.y;
+            jitterX = 2.0f * jitterX / scaledRenderSize.x;
+            jitterY = 2.0f * jitterY / scaledRenderSize.y;
 
             var jitterTranslationMatrix = Matrix4x4.Translate(new Vector3(jitterX, jitterY, 0));
             _renderCamera.nonJitteredProjectionMatrix = _renderCamera.projectionMatrix;
@@ -401,7 +407,8 @@ namespace FidelityFX
             if (autoGenerateReactiveMask)
             {
                 // The auto-reactive mask pass is executed separately from the main FSR2 passes
-                _dispatchCommandBuffer.GetTemporaryRT(Fsr2ShaderIDs.UavAutoReactive, _renderSize.x, _renderSize.y, 0, default, GraphicsFormat.R8_UNorm, 1, true);
+                var scaledRenderSize = GetScaledRenderSize();
+                _dispatchCommandBuffer.GetTemporaryRT(Fsr2ShaderIDs.UavAutoReactive, scaledRenderSize.x, scaledRenderSize.y, 0, default, GraphicsFormat.R8_UNorm, 1, true);
                 _context.GenerateReactiveMask(_genReactiveDescription, _dispatchCommandBuffer);
                 _dispatchDescription.Reactive = Fsr2ShaderIDs.UavAutoReactive;
             }
@@ -456,5 +463,18 @@ namespace FidelityFX
             
             return new Vector2Int(_renderCamera.pixelWidth, _renderCamera.pixelHeight);
         }
+
+        private bool UsingDynamicResolution()
+        {
+            return _renderCamera.allowDynamicResolution || (_originalRenderTarget != null && _originalRenderTarget.useDynamicScale);
+        }
+
+        private Vector2Int GetScaledRenderSize()
+        {
+            if (UsingDynamicResolution())
+                return new Vector2Int(Mathf.CeilToInt(_renderSize.x * ScalableBufferManager.widthScaleFactor), Mathf.CeilToInt(_renderSize.y * ScalableBufferManager.heightScaleFactor));
+            
+            return _renderSize;
+        }
     }
 }

ProjectSettings/ProjectSettings.asset

@@ -144,7 +144,7 @@ PlayerSettings:
   vrSettings:
     enable360StereoCapture: 0
   isWsaHolographicRemotingEnabled: 0
-  enableFrameTimingStats: 0
+  enableFrameTimingStats: 1
   enableOpenGLProfilerGPURecorders: 1
   useHDRDisplay: 0
   D3DHDRBitDepth: 0