Added methods for manipulating camera viewport rect

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

@@ -71,6 +71,8 @@ namespace UnityEngine.Rendering.PostProcessing
         }
 
         public Vector2 jitter { get; private set; }
+        public Vector2Int renderSize => _renderSize;
+        public Vector2Int displaySize => _displaySize;
 
         private Fsr2Context _fsrContext;
         private Vector2Int _renderSize;
@@ -83,6 +85,8 @@ namespace UnityEngine.Rendering.PostProcessing
         private Fsr2.QualityMode _prevQualityMode;
         private Vector2Int _prevDisplaySize;
 
+        private Rect _originalRect;
+
         public bool IsSupported()
         {
             return SystemInfo.supportsComputeShaders && SystemInfo.supportsMotionVectors;
@@ -92,6 +96,11 @@ namespace UnityEngine.Rendering.PostProcessing
         {
             return DepthTextureMode.Depth | DepthTextureMode.MotionVectors;
         }
+        
+        public void Release()
+        {
+            DestroyFsrContext();
+        }
 
         public void ResetHistory()
         {
@@ -103,6 +112,21 @@ namespace UnityEngine.Rendering.PostProcessing
             ApplyJitter(context.camera);
         }
 
+        public void ConfigureCameraViewport(PostProcessRenderContext context)
+        {
+            var cam = context.camera;
+            _displaySize = new Vector2Int(cam.pixelWidth, cam.pixelHeight); // TODO: also support render texture targets properly
+            _originalRect = cam.rect;
+            
+            cam.aspect = (_displaySize.x * _originalRect.width) / (_displaySize.y * _originalRect.height);
+            cam.rect = new Rect(0, 0, _originalRect.width * _renderSize.x / cam.pixelWidth, _originalRect.height * _renderSize.y / cam.pixelHeight);
+        }
+
+        public void ResetCameraViewport(PostProcessRenderContext context)
+        {
+            context.camera.rect = _originalRect;
+        }
+
         public void Render(PostProcessRenderContext context)
         {
             var cmd = context.command;
@@ -143,7 +167,7 @@ namespace UnityEngine.Rendering.PostProcessing
 
         private void CreateFsrContext(PostProcessRenderContext context)
         {
-            _displaySize = new Vector2Int(context.width, context.height);
+            _displaySize = new Vector2Int(context.width, context.height);   // TODO: get rid of this
             
             _prevDisplaySize = _displaySize;
             
@@ -234,11 +258,6 @@ namespace UnityEngine.Rendering.PostProcessing
             }
         }
 
-        public void Release()
-        {
-            DestroyFsrContext();
-        }
-
         private class Callbacks : Fsr2CallbacksBase
         {
             private readonly PostProcessResources _resources;