Enable KHR barycentric features during Vulkan device init (#11298)

# Summary

I was trying to test some barycentric code on Falcor and the RHI was
reporting that my gpu doesn't support barycentric rendering. I'm testing
on linux using an RX 5700 XT graphics card. my card does not list the NV
extension: https://vulkan.gpuinfo.org/displayreport.php?id=47720.

# Test plan

- [ ] validate changes against falcor with a shader that requires
barycentric support.

Signed-off-by: Michael Pollind <mpollind@gmail.com>

Author: pollend

tools/gfx/vulkan/vk-api.h

@@ -301,6 +301,10 @@ struct VulkanExtendedFeatureProperties
     VkPhysicalDeviceFragmentShadingRateFeaturesKHR fragmentShadingRateFeatures = {
         VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADING_RATE_FEATURES_KHR};
 
+    // Fragment shader barycentric features
+    VkPhysicalDeviceFragmentShaderBarycentricFeaturesKHR fragmentShaderBarycentricFeatures = {
+        VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADER_BARYCENTRIC_FEATURES_KHR};
+
     // Vulkan 1.2 features.
     VkPhysicalDeviceVulkan12Features vulkan12Features = {
         VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_2_FEATURES};

tools/gfx/vulkan/vk-device.cpp

@@ -544,6 +544,10 @@ Result DeviceImpl::initVulkanInstanceAndDevice(
         extendedFeatures.fragmentShadingRateFeatures.pNext = deviceFeatures2.pNext;
         deviceFeatures2.pNext = &extendedFeatures.fragmentShadingRateFeatures;
 
+        // fragment shader barycentric features
+        extendedFeatures.fragmentShaderBarycentricFeatures.pNext = deviceFeatures2.pNext;
+        deviceFeatures2.pNext = &extendedFeatures.fragmentShaderBarycentricFeatures;
+
         // raytracing validation features
         extendedFeatures.rayTracingValidationFeatures.pNext = deviceFeatures2.pNext;
         deviceFeatures2.pNext = &extendedFeatures.rayTracingValidationFeatures;
@@ -851,11 +855,29 @@ Result DeviceImpl::initVulkanInstanceAndDevice(
             deviceExtensions.add(VK_KHR_PUSH_DESCRIPTOR_EXTENSION_NAME);
             m_features.add("push-descriptor");
         }
-        if (extensionNames.contains(VK_NV_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME))
+
+        const bool khrFragmentBarycentrics =
+            extensionNames.contains(VK_KHR_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME) &&
+            extendedFeatures.fragmentShaderBarycentricFeatures.fragmentShaderBarycentric == VK_TRUE;
+        const bool nvFragmentBarycentrics =
+            extensionNames.contains(VK_NV_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME);
+        if (khrFragmentBarycentrics || nvFragmentBarycentrics)
         {
-            deviceExtensions.add(VK_NV_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME);
             m_features.add("barycentrics");
         }
+
+        if (khrFragmentBarycentrics)
+        {
+            deviceExtensions.add(VK_KHR_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME);
+            extendedFeatures.fragmentShaderBarycentricFeatures.pNext =
+                (void*)deviceCreateInfo.pNext;
+            deviceCreateInfo.pNext = &extendedFeatures.fragmentShaderBarycentricFeatures;
+        }
+        if (nvFragmentBarycentrics)
+        {
+            deviceExtensions.add(VK_NV_FRAGMENT_SHADER_BARYCENTRIC_EXTENSION_NAME);
+        }
+
         if (extensionNames.contains(VK_NV_SHADER_SUBGROUP_PARTITIONED_EXTENSION_NAME))
         {
             deviceExtensions.add(VK_NV_SHADER_SUBGROUP_PARTITIONED_EXTENSION_NAME);