From 055f27f17e4b80a8fce5d44c33fe2cfc4538310c Mon Sep 17 00:00:00 2001
From: baldurk <baldurk@baldurk.org>
Date: Fri, 16 Sep 2016 11:12:56 +0200
Subject: [PATCH] Handle duplicate root signatures coming back from D3D. Refs
 #325

---
 renderdoc/driver/d3d12/d3d12_device_wrap.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/renderdoc/driver/d3d12/d3d12_device_wrap.cpp b/renderdoc/driver/d3d12/d3d12_device_wrap.cpp
index 6aa2d409a..4c7d989cb 100644
--- a/renderdoc/driver/d3d12/d3d12_device_wrap.cpp
+++ b/renderdoc/driver/d3d12/d3d12_device_wrap.cpp
@@ -531,6 +531,16 @@ HRESULT WrappedID3D12Device::CreateRootSignature(UINT nodeMask, const void *pBlo
   {
     SCOPED_LOCK(m_D3DLock);
 
+    // duplicate signatures can be returned, if Create is called with a previous equivalent blob
+    if(GetResourceManager()->HasWrapper(real))
+    {
+      real->Release();
+      ID3D12RootSignature *existing = (ID3D12RootSignature *)GetResourceManager()->GetWrapper(real);
+      existing->AddRef();
+      *ppvRootSignature = existing;
+      return ret;
+    }
+
     WrappedID3D12RootSignature *wrapped = new WrappedID3D12RootSignature(real, this);
 
     if(m_State >= WRITING)