Preliminary support for realtime clock (#2772)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Initial support for realtime clock.

* Add realtime-clock render feature where seems appropriate.

* Fixes to make NVAPI compile properly.
Change realtime-clock.slang check to use maths that can't overflow.

1 files changed, 9 insertions, 0 deletions

diff --git a/tools/gfx/d3d12/d3d12-device.cpp b/tools/gfx/d3d12/d3d12-device.cpp
index 8f1a3e366..312c81d75 100644
--- a/tools/gfx/d3d12/d3d12-device.cpp
+++ b/tools/gfx/d3d12/d3d12-device.cpp
@@ -24,6 +24,10 @@
 #    define ENABLE_DEBUG_LAYER 0
 #endif
 
+#ifdef GFX_NVAPI
+#    include "../nvapi/nvapi-include.h"
+#endif
+
 namespace gfx
 {
 namespace d3d12
@@ -597,6 +601,11 @@ Result DeviceImpl::initialize(const Desc& desc)
             m_features.add("atomic-float");
         }
 
+        // If we have NVAPI well assume we have realtime clock
+        {
+            m_features.add("realtime-clock");
+        }
+
         m_nvapi = true;
 #endif
     }