Make D3D12DescriptorHeap implement IDescriptorHeap interface

engine/src/RHI/D3D12/D3D12DescriptorHeap.cpp

@@ -58,5 +58,25 @@ D3D12_GPU_DESCRIPTOR_HANDLE D3D12DescriptorHeap::GetGPUDescriptorHandleForHeapSt
     return m_descriptorHeap->GetGPUDescriptorHandleForHeapStart();
 }
 
+CPUDescriptorHandle D3D12DescriptorHeap::GetCPUDescriptorHandle(uint32_t index) {
+    CPUDescriptorHandle handle;
+    handle.ptr = GetCPUDescriptorHandle(index).ptr;
+    return handle;
+}
+
+GPUDescriptorHandle D3D12DescriptorHeap::GetGPUDescriptorHandle(uint32_t index) {
+    GPUDescriptorHandle handle;
+    handle.ptr = GetGPUDescriptorHandle(index).ptr;
+    return handle;
+}
+
+DescriptorType D3D12DescriptorHeap::GetType() const {
+    return static_cast<DescriptorType>(m_type);
+}
+
+uint32_t D3D12DescriptorHeap::GetDescriptorCount() const {
+    return m_numDescriptors;
+}
+
 } // namespace RHI
 } // namespace XCEngine