[hdEmbree] add HDEMBREE_LIGHT_CREATE debug code

pxr/imaging/plugin/hdEmbree/debugCodes.cpp

@@ -0,0 +1,20 @@
+//
+// Copyright 2024 Pixar
+//
+// Licensed under the terms set forth in the LICENSE.txt file available at
+// https://openusd.org/license.
+//
+#include "pxr/pxr.h"
+#include "pxr/imaging/plugin/hdEmbree/debugCodes.h"
+
+#include "pxr/base/tf/debug.h"
+#include "pxr/base/tf/registryManager.h"
+
+PXR_NAMESPACE_OPEN_SCOPE
+
+TF_REGISTRY_FUNCTION(TfDebug)
+{
+    TF_DEBUG_ENVIRONMENT_SYMBOL(HDEMBREE_LIGHT_CREATE, "Creation of HdEmbree lights");
+}
+
+PXR_NAMESPACE_CLOSE_SCOPE

pxr/imaging/plugin/hdEmbree/debugCodes.h

@@ -0,0 +1,21 @@
+//
+// Copyright 2024 Pixar
+//
+// Licensed under the terms set forth in the LICENSE.txt file available at
+// https://openusd.org/license.
+//
+#ifndef PXR_IMAGING_PLUGIN_HD_EMBREE_DEBUG_CODES_H
+#define PXR_IMAGING_PLUGIN_HD_EMBREE_DEBUG_CODES_H
+
+#include "pxr/pxr.h"
+#include "pxr/base/tf/debug.h"
+
+PXR_NAMESPACE_OPEN_SCOPE
+
+TF_DEBUG_CODES(
+    HDEMBREE_LIGHT_CREATE
+);
+
+PXR_NAMESPACE_CLOSE_SCOPE
+
+#endif // PXR_IMAGING_PLUGIN_HD_EMBREE_DEBUG_CODES_H

pxr/imaging/plugin/hdEmbree/light.cpp

@@ -90,6 +90,8 @@ HdEmbree_Light::HdEmbree_Light(SdfPath const& id, TfToken const& lightType)
         return;
     }
 
+    TF_DEBUG(HDEMBREE_LIGHT_CREATE).Msg("Creating light %s: %s\n", id.GetText(), lightType.GetText());
+
     // Set the variant to the right type - Sync will fill rest of data
     if (lightType == HdSprimTypeTokens->cylinderLight) {
         _lightData.lightVariant = HdEmbree_Cylinder();