use crate::prelude::*;
use crate::vk;
use crate::{Entry, Instance};
use std::ffi::CStr;
use std::mem;
use std::ptr;
#[derive(Clone)]
pub struct DeviceGroupCreation {
handle: vk::Instance,
fp: vk::KhrDeviceGroupCreationFn,
}
impl DeviceGroupCreation {
pub fn new(entry: Entry, instance: &Instance) -> Self {
let handle = instance.handle();
let fp = vk::KhrDeviceGroupCreationFn::load(|name| unsafe {
mem::transmute(entry.get_instance_proc_addr(handle, name.as_ptr()))
});
Self { handle, fp }
}
#[inline]
pub unsafe fn enumerate_physical_device_groups_len(&self) -> VkResult<usize> {
let mut group_count = 0;
(self.fp.enumerate_physical_device_groups_khr)(
self.handle,
&mut group_count,
ptr::null_mut(),
)
.result_with_success(group_count as usize)
}
#[inline]
pub unsafe fn enumerate_physical_device_groups(
&self,
out: &mut [vk::PhysicalDeviceGroupProperties],
) -> VkResult<()> {
let mut count = out.len() as u32;
(self.fp.enumerate_physical_device_groups_khr)(self.handle, &mut count, out.as_mut_ptr())
.result()?;
assert_eq!(count as usize, out.len());
Ok(())
}
#[inline]
pub const fn name() -> &'static CStr {
vk::KhrDeviceGroupCreationFn::name()
}
#[inline]
pub fn fp(&self) -> &vk::KhrDeviceGroupCreationFn {
&self.fp
}
#[deprecated = "typo: this function is called `device()`, but returns an `Instance`."]
#[inline]
pub fn device(&self) -> vk::Instance {
self.handle
}
#[inline]
pub fn instance(&self) -> vk::Instance {
self.handle
}
}