From ff711346f3563d7e27c17e0267f9ceb4efdb5e51 Mon Sep 17 00:00:00 2001
From: baldurk <baldurk@baldurk.org>
Date: Tue, 8 Jul 2025 13:37:48 +0100
Subject: [PATCH] Treat read-only DSVs as depth writes disabled for overlays on
 D3D

---
 renderdoc/driver/d3d11/d3d11_overlay.cpp | 4 ++++
 renderdoc/driver/d3d12/d3d12_overlay.cpp | 6 ++++++
 2 files changed, 10 insertions(+)

diff --git a/renderdoc/driver/d3d11/d3d11_overlay.cpp b/renderdoc/driver/d3d11/d3d11_overlay.cpp
index b4b6f3bfd..d14108fb5 100644
--- a/renderdoc/driver/d3d11/d3d11_overlay.cpp
+++ b/renderdoc/driver/d3d11/d3d11_overlay.cpp
@@ -1570,6 +1570,10 @@ ResourceId D3D11Replay::RenderOverlay(ResourceId texid, FloatVector clearCol, De
         d.FrontFace = cur.FrontFace;
         d.BackFace = cur.BackFace;
       }
+      if(dsViewDesc.Flags & D3D11_DSV_READ_ONLY_DEPTH)
+        d.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ZERO;
+      if(dsViewDesc.Flags & D3D11_DSV_READ_ONLY_STENCIL)
+        d.StencilWriteMask = 0;
 
       SAFE_RELEASE(os);
       hr = m_pDevice->CreateDepthStencilState(&d, &os);
diff --git a/renderdoc/driver/d3d12/d3d12_overlay.cpp b/renderdoc/driver/d3d12/d3d12_overlay.cpp
index ea7b4fb53..6568b7a71 100644
--- a/renderdoc/driver/d3d12/d3d12_overlay.cpp
+++ b/renderdoc/driver/d3d12/d3d12_overlay.cpp
@@ -2210,6 +2210,12 @@ ResourceId D3D12Replay::RenderOverlay(ResourceId texid, FloatVector clearCol, De
         }
       }
 
+      if(dsViewDesc.Flags & D3D12_DSV_FLAG_READ_ONLY_DEPTH)
+        psoDesc.DepthStencilState.DepthWriteMask = D3D12_DEPTH_WRITE_MASK_ZERO;
+      if(dsViewDesc.Flags & D3D12_DSV_FLAG_READ_ONLY_STENCIL)
+        psoDesc.DepthStencilState.FrontFace.StencilWriteMask =
+            psoDesc.DepthStencilState.BackFace.StencilWriteMask = 0;
+
       RDCEraseEl(psoDesc.RTVFormats.RTFormats);
       psoDesc.RTVFormats.RTFormats[0] = DXGI_FORMAT_R16G16B16A16_FLOAT;
       psoDesc.RTVFormats.NumRenderTargets = 1;