[Port] [6000.0] Manual backport: fix the FD issue by avoiding pooling of textures

Author: YohannVaastUnity

Packages/com.unity.render-pipelines.core/Runtime/RenderGraph/RenderGraph.cs

@@ -61,6 +61,7 @@ public class InternalRenderGraphContext
         internal RenderGraphDefaultResources defaultResources;
         internal RenderGraphPass executingPass;
         internal bool contextlessTesting;
+        internal bool forceResourceCreation;
     }
 
     // This whole thing is  a bit of a mess InternalRenderGraphContext is public (but all members are internal)
@@ -1186,6 +1187,15 @@ public void BeginRecording(in RenderGraphParameters parameters)
             m_RenderGraphContext.renderGraphPool = m_RenderGraphPool;
             m_RenderGraphContext.defaultResources = m_DefaultResources;
 
+            // With the actual implementation of the Frame Debugger, we cannot re-use resources during the same frame
+            // or it breaks the rendering of the pass preview, since the FD copies the texture after the execution of the RG.
+            m_RenderGraphContext.forceResourceCreation =
+#if UNITY_EDITOR || DEVELOPMENT_BUILD
+                FrameDebugger.enabled;
+#else
+            false;
+#endif
+
             if (m_DebugParameters.immediateMode)
             {
                 UpdateCurrentCompiledGraph(graphHash: -1, forceNoCaching: true);

Packages/com.unity.render-pipelines.core/Runtime/RenderGraph/RenderGraphResourceRegistry.cs

@@ -1034,7 +1034,7 @@ internal bool CreatePooledResource(InternalRenderGraphContext rgContext, int typ
             var resource = m_RenderGraphResources[type].resourceArray[index];
             if (!resource.imported)
             {
-                resource.CreatePooledGraphicsResource();
+                resource.CreatePooledGraphicsResource(rgContext.forceResourceCreation);
 
                 if (m_RenderGraphDebug.enableLogging)
                     resource.LogCreation(m_FrameInformationLogger);

Packages/com.unity.render-pipelines.core/Runtime/RenderGraph/RenderGraphResources.cs

@@ -188,7 +188,7 @@ public virtual bool NeedsFallBack()
             return requestFallBack && writeCount == 0;
         }
 
-        public virtual void CreatePooledGraphicsResource() { }
+        public virtual void CreatePooledGraphicsResource(bool forceResourceCreation) { }
         public virtual void CreateGraphicsResource() { }
         public virtual void UpdateGraphicsResource() { }
         public virtual void ReleasePooledGraphicsResource(int frameIndex) { }
@@ -236,7 +236,7 @@ public override void ReleaseGraphicsResource()
             graphicsResource = null;
         }
 
-        public override void CreatePooledGraphicsResource()
+        public override void CreatePooledGraphicsResource(bool forceResourceCreation)
         {
             Debug.Assert(m_Pool != null, "RenderGraphResource: CreatePooledGraphicsResource should only be called for regular pooled resources");
 
@@ -247,7 +247,7 @@ public override void CreatePooledGraphicsResource()
 
             // If the pool doesn't have any available resource that we can use, we will create one
             // In any case, we will update the graphicsResource name based on the RenderGraph resource name
-            if (!m_Pool.TryGetResource(hashCode, out graphicsResource))
+            if (forceResourceCreation || !m_Pool.TryGetResource(hashCode, out graphicsResource))
             {
                 CreateGraphicsResource();
             }