Add common pipeline state helper to grab stencil face states

renderdoc/api/replay/pipestate.h

@@ -354,6 +354,13 @@ For some APIs that don't distinguish by entry point, this may be empty.
 )");
   rdcarray<ColorBlend> GetColorBlends() const;
 
+  DOCUMENT(R"(Retrieves the current stencil states.
+
+:return: The currently stencil states. Front facing first, back facing second.
+:rtype: Tuple[StencilFace, StencilFace]
+)");
+  rdcpair<StencilFace, StencilFace> GetStencilFaces() const;
+
   DOCUMENT(R"(Determines whether or not independent blending is enabled.
 
 :return: A boolean indicating if independent blending is enabled.

renderdoc/api/replay/pipestate.inl

@@ -1624,6 +1624,33 @@ rdcarray<ColorBlend> PipeState::GetColorBlends() const
   return {};
 }
 
+rdcpair<StencilFace, StencilFace> PipeState::GetStencilFaces() const
+{
+  if(IsCaptureLoaded())
+  {
+    if(IsCaptureD3D11())
+    {
+      return {m_D3D11->outputMerger.depthStencilState.frontFace,
+              m_D3D11->outputMerger.depthStencilState.backFace};
+    }
+    else if(IsCaptureD3D12())
+    {
+      return {m_D3D12->outputMerger.depthStencilState.frontFace,
+              m_D3D12->outputMerger.depthStencilState.backFace};
+    }
+    else if(IsCaptureGL())
+    {
+      return {m_GL->stencilState.frontFace, m_GL->stencilState.backFace};
+    }
+    else if(IsCaptureVK())
+    {
+      return {m_Vulkan->depthStencil.frontFace, m_Vulkan->depthStencil.backFace};
+    }
+  }
+
+  return {StencilFace(), StencilFace()};
+}
+
 bool PipeState::IsIndependentBlendingEnabled() const
 {
   if(IsCaptureLoaded())