extensions/khr: Add VK_KHR_calibrated_timestamps (#890)

Changelog.md

@@ -36,6 +36,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added `Send`/`Sync` to all Vulkan structs (#869)
 - Added `VK_KHR_dynamic_rendering_local_read` device extension (#888)
 - Added `VK_KHR_line_rasterization` device extension (#889)
+- Added `VK_KHR_calibrated_timestamps` device extension (#890)
 
 ### Changed
 

ash/src/extensions/khr/calibrated_timestamps.rs

@@ -0,0 +1,87 @@
+//! <https://registry.khronos.org//vulkan/specs/1.3-extensions/man/html/VK_KHR_calibrated_timestamps.html>
+
+use crate::prelude::*;
+use crate::vk;
+use alloc::vec::Vec;
+use core::mem;
+pub use vk::khr::calibrated_timestamps::NAME;
+
+/// High-level device function wrapper
+#[derive(Clone)]
+pub struct Device {
+    fp: vk::khr::calibrated_timestamps::DeviceFn,
+}
+
+impl Device {
+    pub fn new(instance: &crate::Instance, device: &crate::Device) -> Self {
+        let handle = device.handle();
+        let fp = vk::khr::calibrated_timestamps::DeviceFn::load(|name| unsafe {
+            mem::transmute(instance.get_device_proc_addr(handle, name.as_ptr()))
+        });
+        Self { fp }
+    }
+
+    /// <https://registry.khronos.org//vulkan/specs/1.3-extensions/man/html/vkGetCalibratedTimestampsKHR.html>
+    ///
+    /// Returns a tuple containing `(timestamps, max_deviation)`
+    #[inline]
+    pub unsafe fn get_calibrated_timestamps(
+        &self,
+        device: vk::Device,
+        info: &[vk::CalibratedTimestampInfoKHR<'_>],
+    ) -> VkResult<(Vec<u64>, u64)> {
+        let mut timestamps = Vec::with_capacity(info.len());
+        let mut max_deviation = mem::MaybeUninit::uninit();
+        let max_deviation = (self.fp.get_calibrated_timestamps_khr)(
+            device,
+            info.len() as u32,
+            info.as_ptr(),
+            timestamps.as_mut_ptr(),
+            max_deviation.as_mut_ptr(),
+        )
+        .assume_init_on_success(max_deviation)?;
+        timestamps.set_len(info.len());
+        Ok((timestamps, max_deviation))
+    }
+
+    #[inline]
+    pub fn fp(&self) -> &vk::khr::calibrated_timestamps::DeviceFn {
+        &self.fp
+    }
+}
+
+/// High-level instance function wrapper
+#[derive(Clone)]
+pub struct Instance {
+    fp: vk::khr::calibrated_timestamps::InstanceFn,
+}
+
+impl Instance {
+    pub fn new(entry: &crate::Entry, instance: &crate::Instance) -> Self {
+        let handle = instance.handle();
+        let fp = vk::khr::calibrated_timestamps::InstanceFn::load(|name| unsafe {
+            mem::transmute(entry.get_instance_proc_addr(handle, name.as_ptr()))
+        });
+        Self { fp }
+    }
+
+    /// <https://registry.khronos.org//vulkan/specs/1.3-extensions/man/html/vkGetPhysicalDeviceCalibrateableTimeDomainsKHR.html>
+    #[inline]
+    pub unsafe fn get_physical_device_calibrateable_time_domains(
+        &self,
+        physical_device: vk::PhysicalDevice,
+    ) -> VkResult<Vec<vk::TimeDomainKHR>> {
+        read_into_uninitialized_vector(|count, data| {
+            (self.fp.get_physical_device_calibrateable_time_domains_khr)(
+                physical_device,
+                count,
+                data,
+            )
+        })
+    }
+
+    #[inline]
+    pub fn fp(&self) -> &vk::khr::calibrated_timestamps::InstanceFn {
+        &self.fp
+    }
+}

ash/src/extensions/khr/mod.rs

@@ -1,5 +1,6 @@
 pub mod android_surface;
 pub mod buffer_device_address;
+pub mod calibrated_timestamps;
 pub mod cooperative_matrix;
 pub mod copy_commands2;
 pub mod create_render_pass2;