Add Streaming.Stats for resources streaming statistics

Source/Engine/Streaming/Streaming.cpp

@@ -251,6 +251,20 @@ void StreamingSystem::Execute(TaskGraph* graph)
     graph->DispatchJob(job, 1);
 }
 
+StreamingStats Streaming::GetStats()
+{
+    StreamingStats stats;
+    ResourcesLock.Lock();
+    stats.ResourcesCount = Resources.Count();
+    for (auto e : Resources)
+    {
+        if (e->Streaming.TargetResidency > e->GetCurrentResidency())
+            stats.StreamingResourcesCount++;
+    }
+    ResourcesLock.Unlock();
+    return stats;
+}
+
 void Streaming::RequestStreamingUpdate()
 {
     PROFILE_CPU();

Source/Engine/Streaming/Streaming.h

@@ -8,6 +8,16 @@
 
 class GPUSampler;
 
+// Streaming service statistics container.
+API_STRUCT() struct FLAXENGINE_API StreamingStats
+{
+DECLARE_SCRIPTING_TYPE_MINIMAL(StreamingStats);
+    // Amount of active streamable resources.
+    API_FIELD() int32 ResourcesCount = 0;
+    // Amount of resources that are during streaming in (target residency is higher that the current). Zero if all resources are streamed in.
+    API_FIELD() int32 StreamingResourcesCount = 0;
+};
+
 /// <summary>
 /// The content streaming service.
 /// </summary>
@@ -20,6 +30,11 @@ DECLARE_SCRIPTING_TYPE_NO_SPAWN(Streaming);
     /// </summary>
     API_FIELD() static Array<TextureGroup, InlinedAllocation<32>> TextureGroups;
 
+    /// <summary>
+    /// Gets streaming statistics.
+    /// </summary>
+    API_PROPERTY() static StreamingStats GetStats();
+
     /// <summary>
     /// Requests the streaming update for all the loaded resources. Use it to refresh content streaming after changing configuration.
     /// </summary>