d3d12: Add stub for D3D12SerializeVersionedRootSignature().

dlls/d3d12/d3d12.spec

@@ -7,3 +7,5 @@
 @ stdcall D3D12CreateRootSignatureDeserializer(ptr long ptr ptr)
 @ stdcall D3D12SerializeRootSignature(ptr long ptr ptr)
 @ stdcall D3D12EnableExperimentalFeatures(long ptr ptr ptr)
+#@ stub D3D12CreateVersionedRootSignatureDeserializer
+@ stdcall D3D12SerializeVersionedRootSignature(ptr ptr ptr)

dlls/d3d12/d3d12_main.c

@@ -182,3 +182,16 @@ HRESULT WINAPI D3D12SerializeRootSignature(const D3D12_ROOT_SIGNATURE_DESC *root
 
     return vkd3d_serialize_root_signature(root_signature_desc, version, blob, error_blob);
 }
+
+HRESULT WINAPI D3D12SerializeVersionedRootSignature(const D3D12_VERSIONED_ROOT_SIGNATURE_DESC *desc,
+        ID3DBlob **blob, ID3DBlob **error_blob)
+{
+    FIXME("desc %p, blob %p, error_blob %p partial-stub!\n",
+            desc, blob, error_blob);
+
+    if (desc->Version == D3D_ROOT_SIGNATURE_VERSION_1_0)
+        return D3D12SerializeRootSignature(&desc->Desc_1_0, desc->Version, blob, error_blob);
+
+    FIXME("Unsupported version %#x.\n", desc->Version);
+    return E_NOTIMPL;
+}

include/d3d12.idl

@@ -2171,6 +2171,10 @@ interface ID3D12RootSignatureDeserializer : IUnknown
         const D3D12_VERSIONED_ROOT_SIGNATURE_DESC *root_signature_desc,
         ID3DBlob **blob, ID3DBlob **error_blob);
 
+[local] HRESULT __stdcall D3D12SerializeVersionedRootSignature(
+        const D3D12_VERSIONED_ROOT_SIGNATURE_DESC *desc,
+        ID3DBlob **blob, ID3DBlob **error_blob);
+
 typedef HRESULT (__stdcall *PFN_D3D12_CREATE_DEVICE)(IUnknown *adapter,
         D3D_FEATURE_LEVEL minimum_feature_level, REFIID iid, void **device);