device cap traits

Author: atkurtul

include/nbl/builtin/hlsl/device_capabilities_traits.hlsl

@@ -7,15 +7,44 @@
 #include <nbl/builtin/hlsl/member_test_macros.hlsl>
 
 #ifdef __HLSL_VERSION
+
+NBL_GENERATE_MEMBER_TESTER(shaderFloat64);
+NBL_GENERATE_MEMBER_TESTER(shaderDrawParameters);
+NBL_GENERATE_MEMBER_TESTER(subgroupArithmetic);
+NBL_GENERATE_MEMBER_TESTER(fragmentShaderPixelInterlock);
+NBL_GENERATE_MEMBER_TESTER(maxOptimallyResidentWorkgroupInvocations);
+
+#define NBL_GENERATE_GET_OR_DEFAULT(field, ty, default) \
+template<typename S, bool = has_member_##field<S>::value> struct get_or_default_##field : integral_constant<ty,S::field> {}; \
+template<typename S> struct get_or_default_##field<S,false> : integral_constant<ty,default> {};
+
 namespace nbl
 {
 namespace hlsl
 {
+
+namespace impl
+{
+NBL_GENERATE_GET_OR_DEFAULT(shaderFloat64, bool, false);
+NBL_GENERATE_GET_OR_DEFAULT(shaderDrawParameters, bool, false);
+NBL_GENERATE_GET_OR_DEFAULT(subgroupArithmetic, bool, false);
+NBL_GENERATE_GET_OR_DEFAULT(fragmentShaderPixelInterlock, bool, false);
+NBL_GENERATE_GET_OR_DEFAULT(maxOptimallyResidentWorkgroupInvocations, uint16_t, 0);
+}
+
+
 template<typename device_capabilities>
 struct device_capabilities_traits
 {
-    // TODO: check for members and default them to sane things, only do the 5 members in CJITIncludeLoader.cpp struct, we'll do the rest on `vulkan_1_3` branch with Nahim
+    NBL_CONSTEXPR_STATIC_INLINE bool shaderFloat64                                = impl::get_or_default_shaderFloat64<device_capabilities>::value;
+    NBL_CONSTEXPR_STATIC_INLINE bool shaderDrawParameters                         = impl::get_or_default_shaderDrawParameters<device_capabilities>::value;
+    NBL_CONSTEXPR_STATIC_INLINE bool subgroupArithmetic                           = impl::get_or_default_subgroupArithmetic<device_capabilities>::value;
+    NBL_CONSTEXPR_STATIC_INLINE bool fragmentShaderPixelInterlock                 = impl::get_or_default_fragmentShaderPixelInterlock<device_capabilities>::value;
+    NBL_CONSTEXPR_STATIC_INLINE uint16_t maxOptimallyResidentWorkgroupInvocations = impl::get_or_default_maxOptimallyResidentWorkgroupInvocations<device_capabilities>::value;
 };
+
+#undef NBL_GENERATE_GET_OR_DEFAULT
+
 }
 }
 #endif