Couple of tweaks to facilitate integration

Runtime/FrameInterpolation/FrameInterpolation.cs

@@ -7,6 +7,29 @@ namespace FidelityFX.FrameGen
 {
     public static class FrameInterpolation
     {
+        public static FrameInterpolationContext CreateContext(Vector2Int displaySize, Vector2Int maxRenderSize, FrameInterpolationShaders shaders, GraphicsFormat backBufferFormat, InitializationFlags flags = 0)
+        {
+            if (SystemInfo.usesReversedZBuffer)
+                flags |= InitializationFlags.EnableDepthInverted;
+            else
+                flags &= ~InitializationFlags.EnableDepthInverted;
+            
+            var contextDescription = new ContextDescription
+            {
+                flags = flags,
+                maxRenderSize = maxRenderSize,
+                displaySize = displaySize,
+                backBufferFormat = backBufferFormat,
+                shaders = shaders,
+            };
+            
+            Debug.Log($"Setting up Frame Interpolation with render size: {maxRenderSize.x}x{maxRenderSize.y}, display size: {displaySize.x}x{displaySize.y}, backbuffer format: {backBufferFormat}, flags: {flags}");
+            
+            var context = new FrameInterpolationContext();
+            context.Create(contextDescription);
+            return context;
+        }
+        
         public struct ContextDescription
         {
             public InitializationFlags flags;

Runtime/FrameInterpolation/FrameInterpolationContext.cs

@@ -198,6 +198,7 @@ namespace FidelityFX.FrameGen
             // Schedule work for the interpolation command list
             _setupPass.ScheduleDispatch(commandBuffer, dispatchDescription, doubleBufferId, renderDispatchSizeX, renderDispatchSizeY);
 
+            // TODO delegates are reference types, i.e. this allocates some memory every frame
             Action dispatchGameVectorFieldInpaintingPyramid = () =>
             {
                 SetupSpdConstants(dispatchDescription.renderSize, out var dispatchThreadGroupCount);

Runtime/OpticalFlow/OpticalFlow.cs

@@ -6,7 +6,7 @@ namespace FidelityFX.FrameGen
 {
     public static class OpticalFlow
     {
-        internal const int MinBlockSize = 8;
+        public static readonly int MinBlockSize = 8;
         internal const int OpticalFlowMaxPyramidLevels = 7;
         internal const int HistogramBins = 256;
         internal const int HistogramsPerDim = 3;

Runtime/OpticalFlow/OpticalFlowContext.cs

@@ -36,7 +36,7 @@ namespace FidelityFX.FrameGen
         private readonly Vector2Int[] _opticalFlowTextureSizes = new Vector2Int[OpticalFlow.OpticalFlowMaxPyramidLevels];
         private readonly CustomSampler _sampler = CustomSampler.Create("Optical Flow");
 
-        public void Create(OpticalFlow.ContextDescription contextDescription)
+        public void Create(in OpticalFlow.ContextDescription contextDescription)
         {
             _contextDescription = contextDescription;
 

Runtime/OpticalFlow/OpticalFlowResources.cs

@@ -31,7 +31,7 @@ namespace FidelityFX.FrameGen
         public RenderTexture OpticalFlowSCDPreviousHistogram;
         public RenderTexture OpticalFlowSCDTemp;
         
-        public void Create(OpticalFlow.ContextDescription contextDescription)
+        public void Create(in OpticalFlow.ContextDescription contextDescription)
         {
             Vector2Int opticalFlowInputTextureSize = contextDescription.resolution;
             Vector2Int opticalFlowTextureSize = OpticalFlow.GetOpticalFlowTextureSize(contextDescription.resolution, OpticalFlow.MinBlockSize);