From ad5ea9973dc13019c42413d6b9802ad9caa718b6 Mon Sep 17 00:00:00 2001
From: Jake Turner <jake@evansturner.co.uk>
Date: Tue, 22 Sep 2026 13:31:32 +0100
Subject: [PATCH] D3D12 ApplyState when IB/VB resource is missing set NULL
 resource

- IB is always set to NULL if the application didn't set a valid IB
- VB is set to NULL if the application VB resource does not resolve
---
 renderdoc/driver/d3d12/d3d12_state.cpp | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/renderdoc/driver/d3d12/d3d12_state.cpp b/renderdoc/driver/d3d12/d3d12_state.cpp
index d3d305e9e..9ec2e8e10 100644
--- a/renderdoc/driver/d3d12/d3d12_state.cpp
+++ b/renderdoc/driver/d3d12/d3d12_state.cpp
@@ -309,6 +309,13 @@ void D3D12RenderState::ApplyState(WrappedID3D12Device *dev, ID3D12GraphicsComman
 
       cmd->IASetIndexBuffer(&ib);
     }
+    else
+    {
+      D3D12_INDEX_BUFFER_VIEW nullIB;
+      nullIB.BufferLocation = 0;
+      nullIB.SizeInBytes = 0;
+      cmd->IASetIndexBuffer(&nullIB);
+    }
 
     for(size_t i = 0; i < vbuffers.size(); i++)
     {
@@ -320,14 +327,17 @@ void D3D12RenderState::ApplyState(WrappedID3D12Device *dev, ID3D12GraphicsComman
         ID3D12Resource *res = GetResourceManager()->GetResAs<ID3D12Resource>(vbuffers[i].buf);
         if(res)
           vb.BufferLocation = res->GetGPUVirtualAddress() + vbuffers[i].offs;
-        else
-          vb.BufferLocation = 0;
 
         vb.StrideInBytes = vbuffers[i].stride;
         vb.SizeInBytes = vbuffers[i].size;
 
         cmd->IASetVertexBuffers((UINT)i, 1, &vb);
       }
+      else
+      {
+        vb.SizeInBytes = 0;
+        cmd->IASetVertexBuffers((UINT)i, 1, &vb);
+      }
     }
 
     if(!rts.empty() || dsv.GetResResourceId() != ResourceId())