Added helper on RayTracing to query physical device ray tracing prope…

…rties info (such as shader group handle size)

ash/src/extensions/nv/ray_tracing.rs

@@ -2,7 +2,7 @@
 use prelude::*;
 use std::ffi::CStr;
 use std::mem;
-use version::{DeviceV1_0, InstanceV1_0};
+use version::{DeviceV1_1, InstanceV1_1};
 use vk;
 use RawPtr;
 
@@ -13,7 +13,7 @@ pub struct RayTracing {
 }
 
 impl RayTracing {
-    pub fn new<I: InstanceV1_0, D: DeviceV1_0>(instance: &I, device: &D) -> RayTracing {
+    pub fn new<I: InstanceV1_1, D: DeviceV1_1>(instance: &I, device: &D) -> RayTracing {
         let ray_tracing_fn = vk::NvRayTracingFn::load(|name| unsafe {
             mem::transmute(instance.get_device_proc_addr(device.handle(), name.as_ptr()))
         });
@@ -23,6 +23,19 @@ impl RayTracing {
         }
     }
 
+    pub unsafe fn get_properties<I: InstanceV1_1>(
+        instance: &I,
+        pdevice: vk::PhysicalDevice,
+    ) -> vk::PhysicalDeviceRayTracingPropertiesNV {
+        let mut props_rt = vk::PhysicalDeviceRayTracingPropertiesNV::default();
+        let mut props = vk::PhysicalDeviceProperties2::builder()
+            .next(&mut props_rt)
+            .build();
+
+        instance.get_physical_device_properties2(pdevice, &mut props);
+        props_rt
+    }
+
     pub unsafe fn create_acceleration_structure(
         &self,
         create_info: &vk::AccelerationStructureCreateInfoNV,
@@ -59,7 +72,11 @@ impl RayTracing {
     ) -> vk::MemoryRequirements2KHR {
         let mut requirements = mem::uninitialized();
         self.ray_tracing_fn
-            .get_acceleration_structure_memory_requirements_nv(self.handle, info, &mut requirements);
+            .get_acceleration_structure_memory_requirements_nv(
+                self.handle,
+                info,
+                &mut requirements,
+            );
         requirements
     }
 
@@ -230,11 +247,7 @@ impl RayTracing {
             );
     }
 
-    pub unsafe fn compile_deferred(
-        &self,
-        pipeline: vk::Pipeline,
-        shader: u32,
-    ) -> VkResult<()> {
+    pub unsafe fn compile_deferred(&self, pipeline: vk::Pipeline, shader: u32) -> VkResult<()> {
         let err_code = self
             .ray_tracing_fn
             .compile_deferred_nv(self.handle, pipeline, shader);