Don't create temporary device if D3D12 is not supported

Author: baldurk

util/test/demos/d3d12/d3d12_test.cpp

@@ -170,18 +170,21 @@ void D3D12GraphicsTest::Prepare(int argc, char **argv)
 
   m_Factory = factory;
 
-  ID3D12DevicePtr tmpdev = CreateDevice(adapters, minFeatureLevel);
-
-  if(tmpdev)
+  if(Avail.empty())
   {
-    tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS, &opts, sizeof(opts));
-    tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS1, &opts1, sizeof(opts1));
-    tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS2, &opts2, sizeof(opts2));
-    tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS3, &opts3, sizeof(opts3));
-    tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS4, &opts4, sizeof(opts4));
-    tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS5, &opts5, sizeof(opts5));
-    tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS6, &opts6, sizeof(opts6));
-    tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS7, &opts7, sizeof(opts7));
+    ID3D12DevicePtr tmpdev = CreateDevice(adapters, minFeatureLevel);
+
+    if(tmpdev)
+    {
+      tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS, &opts, sizeof(opts));
+      tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS1, &opts1, sizeof(opts1));
+      tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS2, &opts2, sizeof(opts2));
+      tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS3, &opts3, sizeof(opts3));
+      tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS4, &opts4, sizeof(opts4));
+      tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS5, &opts5, sizeof(opts5));
+      tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS6, &opts6, sizeof(opts6));
+      tmpdev->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS7, &opts7, sizeof(opts7));
+    }
   }
 }