Query the FidelityFX library for upscaler versions upon load, and log the default FSR version that's available.

FSR3UnityPlugin.cpp

@@ -1,5 +1,6 @@
 #include <stdint.h>
 
+#include <sstream>
 #include <vector>
 #include <queue>
 #include <mutex>
@@ -198,6 +199,33 @@ static bool LoadFidelityFXLibrary(_In_ LPCWSTR lpLibFileName)
         return false;
     }
 
+    // Check that we can actually create an upscaler with this library
+    ffx::QueryDescGetVersions versionQuery{};
+    versionQuery.createDescType = FFX_API_CREATE_CONTEXT_DESC_TYPE_UPSCALE;
+    versionQuery.device = s_DX12BackendDesc.device;
+    uint64_t versionCount = 0;
+    versionQuery.outputCount = &versionCount;
+    s_ffxFunctions.Query(nullptr, &versionQuery.header);
+
+    if (versionCount == 0)
+    {
+        UNITY_LOG_ERROR(s_Log, "Failed to load FidelityFX upscaler versions!");
+        return false;
+    }
+
+    // Obtain the default upscaler version and log its name
+    std::vector<const char*> versionNames;
+    std::vector<uint64_t> versionIds;
+    versionIds.resize(versionCount);
+    versionNames.resize(versionCount);
+    versionQuery.versionIds = versionIds.data();
+    versionQuery.versionNames = versionNames.data();
+    s_ffxFunctions.Query(nullptr, &versionQuery.header);
+
+    std::stringstream ss;
+    ss << "Loaded FidelityFX upscaler: FSR " << versionNames[0];
+    UNITY_LOG(s_Log, ss.str().c_str());
+
     return true;
 }