VideoBackends:D3D12: Dynamic vertex loader support

1 files changed, 15 insertions, 0 deletions

diff --git a/Source/Core/VideoBackends/D3D12/DX12Context.cpp b/Source/Core/VideoBackends/D3D12/DX12Context.cpp
index e3ff8a7417..5cf0e414c4 100644
--- a/Source/Core/VideoBackends/D3D12/DX12Context.cpp
+++ b/Source/Core/VideoBackends/D3D12/DX12Context.cpp
@@ -261,6 +261,16 @@ bool DXContext::CreateDescriptorHeaps()
   return true;
 }
 
+static void SetRootParamConstant(D3D12_ROOT_PARAMETER* rp, u32 shader_reg, u32 num_values,
+                                 D3D12_SHADER_VISIBILITY visibility)
+{
+  rp->ParameterType = D3D12_ROOT_PARAMETER_TYPE_32BIT_CONSTANTS;
+  rp->Constants.Num32BitValues = num_values;
+  rp->Constants.ShaderRegister = shader_reg;
+  rp->Constants.RegisterSpace = 0;
+  rp->ShaderVisibility = visibility;
+}
+
 static void SetRootParamCBV(D3D12_ROOT_PARAMETER* rp, u32 shader_reg,
                             D3D12_SHADER_VISIBILITY visibility)
 {
@@ -345,6 +355,11 @@ bool DXContext::CreateGXRootSignature()
   param_count++;
   SetRootParamCBV(&params[param_count], 0, D3D12_SHADER_VISIBILITY_GEOMETRY);
   param_count++;
+  SetRootParamTable(&params[param_count], &ranges[param_count], D3D12_DESCRIPTOR_RANGE_TYPE_SRV, 3,
+                    1, D3D12_SHADER_VISIBILITY_VERTEX);
+  param_count++;
+  SetRootParamConstant(&params[param_count], 2, 1, D3D12_SHADER_VISIBILITY_VERTEX);
+  param_count++;
 
   // Since these must be contiguous, pixel lighting goes to bbox if not enabled.
   if (g_ActiveConfig.bBBoxEnable)