[D3D12] Simplify Intel Arc GPU checking

src/xenia/gpu/d3d12/d3d12_render_target_cache.cc

@@ -223,6 +223,9 @@ bool D3D12RenderTargetCache::Initialize() {
     // UHD Graphics 630), the "always" stencil comparison function isn't working
     // properly, so clears in the Xbox 360's Direct3D 9 don't work. Forcing ROV
     // there.
+    // As of December 2025, Intel pre-Arc still suffers from this issue.
+    // Intel Arc (Alchemist and newer) does not have this issue so an
+    // exception is made so they default to RTV.
 #if 1
     // The ROV path is currently much slower generally.
     // TODO(Triang3l): Make ROV the default when it's optimized better (for
@@ -446,8 +449,10 @@ bool D3D12RenderTargetCache::Initialize() {
   use_stencil_reference_output_ =
       cvars::native_stencil_value_output &&
       provider.IsPSSpecifiedStencilReferenceSupported() &&
-      (cvars::native_stencil_value_output_d3d12_intel ||
+      (provider.IsIntelArcGpu() ||
-       !provider.IsIntelArcGpu());
+       cvars::native_stencil_value_output_d3d12_intel ||
+       provider.GetAdapterVendorID() !=
+           ui::GraphicsProvider::GpuVendorID::kIntel);
 
   if (path_ == Path::kHostRenderTargets) {
     // Host render targets.

src/xenia/ui/d3d12/d3d12_provider.cc

@@ -47,6 +47,20 @@ bool D3D12Provider::IsD3D12APIAvailable() {
   return true;
 }
 
+const std::string& D3D12Provider::GetAdapterDescription() const {
+  return adapter_description_;
+}
+
+// Check for Intel Arc cards and Intel Graphics iGPUs which use
+// the same architecture.
+bool D3D12Provider::IsIntelArcGpu() const {
+  if (adapter_vendor_id_ != GpuVendorID::kIntel) {
+    return false;
+  }
+  return adapter_description_.starts_with("Intel(R) Arc(TM)") ||
+         adapter_description_.starts_with("Intel(R) Graphics");
+}
+
 std::unique_ptr<D3D12Provider> D3D12Provider::Create() {
   std::unique_ptr<D3D12Provider> provider(new D3D12Provider);
   if (!provider->Initialize()) {
@@ -300,6 +314,7 @@ bool D3D12Provider::Initialize() {
     if (WideCharToMultiByte(CP_UTF8, 0, adapter_desc.Description, -1,
                             adapter_name_mb, adapter_name_mb_size, nullptr,
                             nullptr) != 0) {
+      adapter_description_ = adapter_name_mb;
       XELOGD3D("DXGI adapter: {} (vendor 0x{:04X}, device 0x{:04X})",
                adapter_name_mb, adapter_desc.VendorId, adapter_desc.DeviceId);
     }

src/xenia/ui/d3d12/d3d12_provider.h

@@ -97,43 +97,8 @@ class D3D12Provider : public GraphicsProvider {
   // Adapter info.
   GpuVendorID GetAdapterVendorID() const { return adapter_vendor_id_; }
 
-  bool IsIntelArcGpu() const {
+  const std::string& GetAdapterDescription() const;
-    if (adapter_vendor_id_ != GpuVendorID::kIntel) {
+  bool IsIntelArcGpu() const;
-      return false;
-    }
-
-    // Desktop IDs - Alchemist
-    if (adapter_device_id_ >= 0x56A0 && adapter_device_id_ <= 0x56BD) {
-      return true;
-    }
-
-    // Mobile IDs - Alchemist
-    if (adapter_device_id_ >= 0x5690 && adapter_device_id_ <= 0x5697) {
-      return true;
-    }
-
-    // Desktop IDs - Battlemage
-    if (adapter_device_id_ >= 0xE20B && adapter_device_id_ <= 0xE20C) {
-      return true;
-    }
-
-    // Meteor Lake
-    if (adapter_device_id_ >= 0x7D40 && adapter_device_id_ <= 0x7DD5) {
-      return true;
-    }
-
-    // Lunar Lake
-    if (adapter_device_id_ >= 0x6420 && adapter_device_id_ <= 0x64B0) {
-      return true;
-    }
-
-    // Arrow Lake
-    if (adapter_device_id_ >= 0x7D41 && adapter_device_id_ <= 0x7D67) {
-      return true;
-    }
-
-    return false;
-  }
 
   // Device features.
   D3D12_HEAP_FLAGS GetHeapFlagCreateNotZeroed() const {
@@ -232,6 +197,7 @@ class D3D12Provider : public GraphicsProvider {
 
   GpuVendorID adapter_vendor_id_;
   uint32_t adapter_device_id_;
+  std::string adapter_description_;
 
   D3D12_HEAP_FLAGS heap_flag_create_not_zeroed_;
   D3D12_PROGRAMMABLE_SAMPLE_POSITIONS_TIER programmable_sample_positions_tier_;