Add directional shadow integration coverage

engine/include/XCEngine/RHI/D3D12/D3D12CommandList.h

@@ -145,10 +145,13 @@ private:
     ComPtr<ID3D12DescriptorHeap> m_rtvHeap;
     ComPtr<ID3D12DescriptorHeap> m_shaderVisibleCbvSrvUavHeap;
     ComPtr<ID3D12DescriptorHeap> m_shaderVisibleSamplerHeap;
+    std::vector<ComPtr<ID3D12DescriptorHeap>> m_retiredShaderVisibleHeaps;
     ID3D12Device* m_device = nullptr;
     CommandQueueType m_type;
     uint32_t m_shaderVisibleCbvSrvUavHeapCapacity = 0;
     uint32_t m_shaderVisibleSamplerHeapCapacity = 0;
+    uint32_t m_shaderVisibleCbvSrvUavCursor = 0;
+    uint32_t m_shaderVisibleSamplerCursor = 0;
 
     std::unordered_map<ID3D12Resource*, ResourceStates> m_resourceStateMap;
     std::vector<ID3D12Resource*> m_trackedResources;

engine/include/XCEngine/Rendering/CameraRenderer.h

@@ -16,6 +16,7 @@ namespace Rendering {
 
 class RenderSurface;
 class RenderPipelineAsset;
+struct RenderContext;
 
 class CameraRenderer {
 public:
@@ -43,7 +44,12 @@ public:
     bool Render(const CameraRenderRequest& request);
 
 private:
+    struct DirectionalShadowSurfaceResources;
+
     void ResetPipeline(std::unique_ptr<RenderPipeline> pipeline);
+    DirectionalShadowSurfaceResources* AcquireDirectionalShadowSurface(
+        const RenderContext& context,
+        const DirectionalShadowRenderPlan& plan);
 
     RenderSceneExtractor m_sceneExtractor;
     std::shared_ptr<const RenderPipelineAsset> m_pipelineAsset;
@@ -51,6 +57,7 @@ private:
     std::unique_ptr<ObjectIdPass> m_objectIdPass;
     std::unique_ptr<RenderPass> m_depthOnlyPass;
     std::unique_ptr<RenderPass> m_shadowCasterPass;
+    std::unique_ptr<DirectionalShadowSurfaceResources> m_directionalShadowSurface;
 };
 
 } // namespace Rendering