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use crate::prelude::*;
use crate::vk;
use crate::{Entry, Instance};
use std::ffi::CStr;
use std::mem;
/// <https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VK_NV_coverage_reduction_mode.html>
#[derive(Clone)]
pub struct CoverageReductionMode {
fp: vk::NvCoverageReductionModeFn,
}
impl CoverageReductionMode {
pub fn new(entry: &Entry, instance: &Instance) -> Self {
let fp = vk::NvCoverageReductionModeFn::load(|name| unsafe {
mem::transmute(entry.get_instance_proc_addr(instance.handle(), name.as_ptr()))
});
Self { fp }
}
/// Retrieve the number of elements to pass to [`get_physical_device_supported_framebuffer_mixed_samples_combinations()`][Self::get_physical_device_supported_framebuffer_mixed_samples_combinations()]
#[inline]
pub unsafe fn get_physical_device_supported_framebuffer_mixed_samples_combinations_len(
&self,
physical_device: vk::PhysicalDevice,
) -> VkResult<usize> {
let mut count = 0;
(self
.fp
.get_physical_device_supported_framebuffer_mixed_samples_combinations_nv)(
physical_device,
&mut count,
std::ptr::null_mut(),
)
.result_with_success(count as usize)
}
/// <https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/vkGetPhysicalDeviceSupportedFramebufferMixedSamplesCombinationsNV.html>
///
/// Call [`get_physical_device_supported_framebuffer_mixed_samples_combinations_len()`][Self::get_physical_device_supported_framebuffer_mixed_samples_combinations_len()] to query the number of elements to pass to `out`.
/// Be sure to [`Default::default()`]-initialize these elements and optionally set their `p_next` pointer.
#[inline]
pub unsafe fn get_physical_device_supported_framebuffer_mixed_samples_combinations(
&self,
physical_device: vk::PhysicalDevice,
out: &mut [vk::FramebufferMixedSamplesCombinationNV],
) -> VkResult<()> {
let mut count = out.len() as u32;
(self
.fp
.get_physical_device_supported_framebuffer_mixed_samples_combinations_nv)(
physical_device,
&mut count,
out.as_mut_ptr(),
)
.result()?;
assert_eq!(count as usize, out.len());
Ok(())
}
#[inline]
pub const fn name() -> &'static CStr {
vk::NvCoverageReductionModeFn::name()
}
#[inline]
pub fn fp(&self) -> &vk::NvCoverageReductionModeFn {
&self.fp
}
}
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