Hydrogent: render shadows in SOLID mode only (fix #252)

Author: TheMostDiligent

Hydrogent/interface/Tasks/HnRenderShadowsTask.hpp

@@ -1,5 +1,5 @@
 /*
- *  Copyright 2024 Diligent Graphics LLC
+ *  Copyright 2024-2025 Diligent Graphics LLC
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -106,6 +106,8 @@ class HnRenderShadowsTask final : public HnTask
 
     virtual void Execute(pxr::HdTaskContext* TaskCtx) override final;
 
+    virtual bool IsActive(pxr::HdRenderIndex& RenderIndex) const override final;
+
 private:
     void PrepareClearDepthPSO(const HnRenderDelegate& RenderDelegate);
     void PrepareClearDepthVB(const HnRenderDelegate& RenderDelegate);

Hydrogent/src/Tasks/HnRenderShadowsTask.cpp

@@ -283,6 +283,13 @@ void HnRenderShadowsTask::Prepare(pxr::HdTaskContext* TaskCtx,
     }
 }
 
+bool HnRenderShadowsTask::IsActive(pxr::HdRenderIndex& RenderIndex) const
+{
+    pxr::HdRenderDelegate* RenderDelegate = RenderIndex.GetRenderDelegate();
+    const HnRenderParam*   RenderParam    = static_cast<const HnRenderParam*>(RenderDelegate->GetRenderParam());
+    return RenderParam->GetRenderMode() == HN_RENDER_MODE_SOLID;
+}
+
 void HnRenderShadowsTask::Execute(pxr::HdTaskContext* TaskCtx)
 {
     if (m_RenderIndex == nullptr)