add position fetch extension feature

Author: keptsecret

src/nbl/video/CVulkanPhysicalDevice.cpp

@@ -1062,6 +1062,8 @@ std::unique_ptr<CVulkanPhysicalDevice> CVulkanPhysicalDevice::create(core::smart
 
         features.rayQuery = isExtensionSupported(VK_KHR_RAY_QUERY_EXTENSION_NAME) && isExtensionSupported(VK_KHR_RAY_TRACING_MAINTENANCE_1_EXTENSION_NAME);
 
+        features.rayTracingPositionFetch = isExtensionSupported(VK_KHR_RAY_TRACING_POSITION_FETCH_EXTENSION_NAME);
+
         if (isExtensionSupported(VK_NV_REPRESENTATIVE_FRAGMENT_TEST_EXTENSION_NAME))
             features.representativeFragmentTest = representativeFragmentTestFeatures.representativeFragmentTest;
 
@@ -1463,6 +1465,9 @@ core::smart_refctd_ptr<ILogicalDevice> CVulkanPhysicalDevice::createLogicalDevic
         VkPhysicalDeviceRayQueryFeaturesKHR rayQueryFeatures = { VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_QUERY_FEATURES_KHR,nullptr };
         REQUIRE_EXTENSION_IF(enabledFeatures.rayQuery,VK_KHR_RAY_QUERY_EXTENSION_NAME,&rayQueryFeatures); // feature dependency taken care of
 
+        VkPhysicalDeviceRayTracingPositionFetchFeaturesKHR rayTracingPositionFetchFeatures = { VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_POSITION_FETCH_FEATURES_KHR,nullptr };
+        REQUIRE_EXTENSION_IF(enabledFeatures.rayTracingPositionFetch, VK_KHR_RAY_TRACING_POSITION_FETCH_EXTENSION_NAME, &rayTracingPositionFetchFeatures); // feature dependency taken care of
+
         VkPhysicalDeviceShaderSMBuiltinsFeaturesNV shaderSMBuiltinsFeaturesNV = { VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_SM_BUILTINS_FEATURES_NV,nullptr };
         enableExtensionIfAvailable(VK_NV_SHADER_SM_BUILTINS_EXTENSION_NAME,&shaderSMBuiltinsFeaturesNV);
 

src/nbl/video/device_capabilities/device_features.json

@@ -4023,8 +4023,15 @@
                 "VK_AMD_extension_478",
                 "VK_AMD_extension_479",
                 "VK_EXT_extension_480",
-                "VK_EXT_extension_481",
-                "TODO: implement",
+                "VK_EXT_extension_481"
+            ]
+        },
+        {
+            "type": "bool",
+            "name": "rayTracingPositionFetch",
+            "value": false,
+            "comment": [
+                "RayTracingPositionFetchFeaturesKHR",
                 "VK_KHR_ray_tracing_position_fetch"
             ]
         },