Allow option flags to be set from Unity and set motion vector gamma to 1 by default

Packages/com.unity.postprocessing@3.2.2/PostProcessing/Runtime/Effects/Upscaling/PSSRUpscaler.cs

@@ -98,6 +98,10 @@ namespace UnityEngine.Rendering.PostProcessing
 			
 			// TODO: if PSSR needs a copy of the previous depth and motion vectors anyway, why not just double-buffer those resources ourselves and make good use of these otherwise dumb copies?
 			PrepareInputs(cmd, context, config, _inputColor, _inputDepth, _inputMotionVectors);
+
+			var flags = PSSRPlugin.OptionFlags.None;
+			if (SystemInfo.usesReversedZBuffer) flags |= PSSRPlugin.OptionFlags.ReverseDepth;
+			if (config.exposureSource == Upscaling.ExposureSource.Auto) flags |= PSSRPlugin.OptionFlags.AutoExposure;
 			
 			_dispatchParams.color = ToNativePtr(_inputColor);
 			_dispatchParams.depth = ToNativePtr(_inputDepth);
@@ -119,6 +123,7 @@ namespace UnityEngine.Rendering.PostProcessing
 			_dispatchParams.FromCamera(context.camera);
 			_dispatchParams.preExposure = config.preExposure;
 			_dispatchParams.resetHistory = config.Reset ? 1u : 0u;
+			_dispatchParams.flags = flags;
 			
 			Marshal.StructureToPtr(_dispatchParams, _dispatchParamsBuffer, false);
 			cmd.IssuePluginEventAndData(PSSRPlugin.GetRenderEventAndDataFunc(), 1, _dispatchParamsBuffer);
@@ -185,12 +190,11 @@ namespace UnityEngine.Rendering.PostProcessing
 				public double camPositionX;
 				public double camPositionY;
 				public double camPositionZ;
-				public float pad;
-
 				public float camNear;
 				public float camFar;
 				public float preExposure;
 				public uint resetHistory;
+				public OptionFlags flags;
 
 				public void FromCamera(Camera cam)
 				{
@@ -201,12 +205,20 @@ namespace UnityEngine.Rendering.PostProcessing
 					camPositionX = cam.transform.position.x;
 					camPositionY = cam.transform.position.y;
 					camPositionZ = cam.transform.position.z;
-					pad = 0f;
-
 					camNear = cam.nearClipPlane;
 					camFar = cam.farClipPlane;
 				}
 			}
+			
+			[Flags]
+			public enum OptionFlags: uint
+			{
+				None = 0u,
+				ViewSpaceDepth = 1u << 14,
+				ReverseDepth = 1u << 15,
+				AutoExposure = 1u << 16,
+				PassThrough = 1u << 31,
+			}
 		}
 #else
 		public static bool IsSupported => false;

Tools/PSSRPlugin/pssrplugin.cpp

@@ -245,17 +245,16 @@ typedef struct pssr_dispatch_params_s
     Vector2f jitter;
     Vector2f motionVectorScale;
 
-    Matrix4f camProjection;
+    Matrix4f camProjectionNoJitter;
     Vector3f camForward;
     Vector3f camUp;
     Vector3f camRight;
     Vector3d camPosition;
-    float pad;
-
     float camNear;
     float camFar;
     float preExposure;
     uint32_t resetHistory;
+    MfsrOptionFlags flags;
 
 } pssr_dispatch_params_t;
 
@@ -410,7 +409,7 @@ static void UNITY_INTERFACE_API OnRenderEventAndData(int eventID, void* data)
             dispatchParams.m_reactiveMask = params->reactiveMask;
             dispatchParams.m_prevMotionVectors = nullptr;   // MFSR context keeps a copy of the previous motion vectors internally
             dispatchParams.m_preExposure = params->preExposure;
-            dispatchParams.m_projectionNoJitter = params->camProjection;
+            dispatchParams.m_projectionNoJitter = params->camProjectionNoJitter;
             dispatchParams.m_camForward = params->camForward;
             dispatchParams.m_camUp = params->camUp;
             dispatchParams.m_camRight = params->camRight;
@@ -421,8 +420,9 @@ static void UNITY_INTERFACE_API OnRenderEventAndData(int eventID, void* data)
             dispatchParams.m_renderHeight = params->renderHeight;
             dispatchParams.m_jitter = params->jitter;
             dispatchParams.m_motionVectorScale = params->motionVectorScale;
+            dispatchParams.m_motionVectorGamma = 1.0f;
             dispatchParams.m_reset = params->resetHistory != 0;
-            dispatchParams.m_flags = MfsrOptionFlags::kReverseDepth;    // TODO: make flags available as plugin input
+            dispatchParams.m_flags = params->flags;
 
             dispatchMfsr(s_mfsrContext, cmd, &dispatchParams);