From cf746cf0be42b1001ddb7e0ca52e34d79451389e Mon Sep 17 00:00:00 2001
From: baldurk <baldurk@baldurk.org>
Date: Mon, 10 Nov 2025 11:10:57 +0000
Subject: [PATCH] Work around poor D3D12 behaviour to return unusable Desc.
 Closes #3728

* For some cases D3D12's GetDesc() returns a desc that is not usable for
  resource creation, and must instead be modified to work.
---
 renderdoc/driver/d3d12/d3d12_resources.h | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/renderdoc/driver/d3d12/d3d12_resources.h b/renderdoc/driver/d3d12/d3d12_resources.h
index 368e069e0..a40946e27 100644
--- a/renderdoc/driver/d3d12/d3d12_resources.h
+++ b/renderdoc/driver/d3d12/d3d12_resources.h
@@ -1536,7 +1536,15 @@ public:
   //////////////////////////////
   // implement ID3D12Resource
 
-  virtual D3D12_RESOURCE_DESC STDMETHODCALLTYPE GetDesc() { return m_pReal->GetDesc(); }
+  virtual D3D12_RESOURCE_DESC STDMETHODCALLTYPE GetDesc()
+  {
+    D3D12_RESOURCE_DESC ret = m_pReal->GetDesc();
+    // normalise alignment - sometimes D3D12 returns an alignment that is invalid to use
+    if(ret.Dimension == D3D12_RESOURCE_DIMENSION_BUFFER &&
+       ret.Alignment != D3D12_DEFAULT_RESOURCE_PLACEMENT_ALIGNMENT)
+      ret.Alignment = 0;
+    return ret;
+  }
   virtual D3D12_GPU_VIRTUAL_ADDRESS STDMETHODCALLTYPE GetGPUVirtualAddress()
   {
     return m_pReal->GetGPUVirtualAddress();