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// Copyright (c) 2023 The vulkano developers
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE or
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT
// license <LICENSE-MIT or https://opensource.org/licenses/MIT>,
// at your option. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
//! An opaque data structure that is used to accelerate spatial queries on geometry data.
//!
//! Acceleration structures contain geometry data, arranged in such a way that the device can
//! easily search through the data and check for intersections between the geometry and rays
//! (lines). The geometry data can consist of either triangles, or axis-aligned bounding boxes
//! (AABBs).
//!
//! Acceleration structures come in two forms: top-level and bottom-level. A bottom-level
//! acceleration structure holds the actual geometry data, while a top-level structure contains
//! instances of (references to) one or more bottom-level structures. A top-level structure is
//! intended to contain the whole rendered scene (or the relevant parts of it), while a
//! bottom-level structure may contain individual objects within the scene. This two-level
//! arrangement allows you to easily rearrange the scene, adding and removing parts of it as needed.
//!
//! # Building an acceleration structure
//!
//! When an acceleration structure object is created, it is in an uninitialized state and contains
//! garbage data. To be able to use it for anything, you must first *build* the structure on the
//! device, using the [`build_acceleration_structure`] or [`build_acceleration_structure_indirect`]
//! command buffer commands. You use [`BuildAccelerationStructureMode::Build`] to build a structure
//! from scratch.
//!
//! When specifying geometry data for an acceleration structure build, certain triangle, AABB or
//! instance values mark that item as *inactive*. An inactive item is completely ignored within
//! the acceleration structure, and acts as if it's not there. The following special values
//! make an item inactive:
//! - For triangles, if the vertex format is a floating-point type, then the triangle is inactive
//! if any of its vertices have NaN as their first coordinate. For integer vertex formats, it is
//! not possible to mark triangles as inactive.
//! - For AABBs, if [`AabbPositions::min[0]`](AabbPositions::min) is NaN.
//! - For instances, if [`AccelerationStructureInstance::acceleration_structure_reference`] is 0.
//!
//! # Updating an acceleration structure
//!
//! Once an acceleration structure is built, if it was built previously with the
//! [`BuildAccelerationStructureFlags::ALLOW_UPDATE`] flag, then it is possible to update the
//! structure with new data. You use [`BuildAccelerationStructureMode::Update`] for this, which
//! specifies the source acceleration structure to use as a starting point for the update.
//! This can be the same as the destination structure (the update will happen in-place), or a
//! different one.
//!
//! An update operation is limited in which parts of the data it may change. You may change most
//! buffers and their contents, as well as strides and offsets:
//! - [`AccelerationStructureBuildGeometryInfo::scratch_data`]
//! - [`AccelerationStructureGeometryTrianglesData::vertex_data`]
//! - [`AccelerationStructureGeometryTrianglesData::vertex_stride`]
//! - [`AccelerationStructureGeometryTrianglesData::transform_data`]
//! (but the variant of `Option` must not change)
//! - [`AccelerationStructureGeometryAabbsData::data`]
//! - [`AccelerationStructureGeometryAabbsData::stride`]
//! - [`AccelerationStructureGeometryInstancesData::data`]
//! - [`AccelerationStructureBuildRangeInfo::primitive_offset`]
//! - [`AccelerationStructureBuildRangeInfo::first_vertex`] if no index buffer is used
//! - [`AccelerationStructureBuildRangeInfo::transform_offset`]
//!
//! No other values may be changed, including in particular the variant or number of elements in
//! [`AccelerationStructureBuildGeometryInfo::geometries`], and the value of
//! [`AccelerationStructureBuildRangeInfo::primitive_count`].
//! The enum variants and data in [`AccelerationStructureGeometryTrianglesData::index_data`] must
//! not be changed, but it is allowed to specify a new index buffer, as long as it contains the
//! exact same indices as the old one.
//!
//! An update operation may not change the inactive status of an item: active items must remain
//! active in the update and inactive items must remain inactive.
//!
//! # Accessing an acceleration structure in a shader
//!
//! Acceleration structures can be bound to and accessed in any shader type. They are accessed
//! as descriptors, like buffers and images, and are declared in GLSL with
//! ```glsl
//! layout (set = N, binding = N) uniform accelerationStructureEXT nameOfTheVariable;
//! ```
//! You must enable either the `GL_EXT_ray_query` or the `GL_EXT_ray_tracing` GLSL extensions in
//! the shader to use this.
//!
//! On the Vulkano side, you can then create a descriptor set layout using
//! [`DescriptorType::AccelerationStructure`] as a descriptor type, and write the
//! acceleration structure to a descriptor set using [`WriteDescriptorSet::acceleration_structure`].
//!
//! [`build_acceleration_structure`]: crate::command_buffer::AutoCommandBufferBuilder::build_acceleration_structure
//! [`build_acceleration_structure_indirect`]: crate::command_buffer::AutoCommandBufferBuilder::build_acceleration_structure_indirect
//! [`DescriptorType::AccelerationStructure`]: crate::descriptor_set::layout::DescriptorType::AccelerationStructure
//! [`WriteDescriptorSet::acceleration_structure`]: crate::descriptor_set::WriteDescriptorSet::acceleration_structure
use crate::{
buffer::{BufferUsage, IndexBuffer, Subbuffer},
device::{Device, DeviceOwned},
format::{Format, FormatFeatures},
instance::InstanceOwnedDebugWrapper,
macros::{impl_id_counter, vulkan_bitflags, vulkan_enum},
DeviceAddress, DeviceSize, NonNullDeviceAddress, Packed24_8, Requires, RequiresAllOf,
RequiresOneOf, Validated, ValidationError, VulkanError, VulkanObject,
};
use bytemuck::{Pod, Zeroable};
use std::{fmt::Debug, hash::Hash, mem::MaybeUninit, num::NonZeroU64, ptr, sync::Arc};
/// An opaque data structure that is used to accelerate spatial queries on geometry data.
#[derive(Debug)]
pub struct AccelerationStructure {
device: InstanceOwnedDebugWrapper<Arc<Device>>,
handle: ash::vk::AccelerationStructureKHR,
id: NonZeroU64,
create_flags: AccelerationStructureCreateFlags,
buffer: Subbuffer<[u8]>,
ty: AccelerationStructureType,
}
impl AccelerationStructure {
/// Creates a new `AccelerationStructure`.
///
/// The [`acceleration_structure`] feature must be enabled on the device.
///
/// # Safety
///
/// - `create_info.buffer` (and any subbuffer it overlaps with) must not be accessed
/// while it is bound to the acceleration structure.
///
/// [`acceleration_structure`]: crate::device::Features::acceleration_structure
#[inline]
pub unsafe fn new(
device: Arc<Device>,
create_info: AccelerationStructureCreateInfo,
) -> Result<Arc<Self>, Validated<VulkanError>> {
Self::validate_new(&device, &create_info)?;
Ok(Self::new_unchecked(device, create_info)?)
}
fn validate_new(
device: &Device,
create_info: &AccelerationStructureCreateInfo,
) -> Result<(), Box<ValidationError>> {
if !device.enabled_extensions().khr_acceleration_structure {
return Err(Box::new(ValidationError {
requires_one_of: RequiresOneOf(&[RequiresAllOf(&[Requires::DeviceExtension(
"khr_acceleration_structure",
)])]),
..Default::default()
}));
}
if !device.enabled_features().acceleration_structure {
return Err(Box::new(ValidationError {
requires_one_of: RequiresOneOf(&[RequiresAllOf(&[Requires::Feature(
"acceleration_structure",
)])]),
vuids: &["VUID-vkCreateAccelerationStructureKHR-accelerationStructure-03611"],
..Default::default()
}));
}
// VUID-vkCreateAccelerationStructureKHR-pCreateInfo-parameter
create_info
.validate(device)
.map_err(|err| err.add_context("create_info"))?;
Ok(())
}
#[cfg_attr(not(feature = "document_unchecked"), doc(hidden))]
pub unsafe fn new_unchecked(
device: Arc<Device>,
create_info: AccelerationStructureCreateInfo,
) -> Result<Arc<Self>, VulkanError> {
let &AccelerationStructureCreateInfo {
create_flags,
ref buffer,
ty,
_ne: _,
} = &create_info;
let create_info_vk = ash::vk::AccelerationStructureCreateInfoKHR {
create_flags: create_flags.into(),
buffer: buffer.buffer().handle(),
offset: buffer.offset(),
size: buffer.size(),
ty: ty.into(),
device_address: 0, // TODO: allow user to specify
..Default::default()
};
let handle = {
let fns = device.fns();
let mut output = MaybeUninit::uninit();
(fns.khr_acceleration_structure
.create_acceleration_structure_khr)(
device.handle(),
&create_info_vk,
ptr::null(),
output.as_mut_ptr(),
)
.result()
.map_err(VulkanError::from)?;
output.assume_init()
};
Ok(Self::from_handle(device, handle, create_info))
}
/// Creates a new `AccelerationStructure` from a raw object handle.
///
/// # Safety
///
/// - `handle` must be a valid Vulkan object handle created from `device`.
/// - `create_info` must match the info used to create the object.
pub unsafe fn from_handle(
device: Arc<Device>,
handle: ash::vk::AccelerationStructureKHR,
create_info: AccelerationStructureCreateInfo,
) -> Arc<Self> {
let AccelerationStructureCreateInfo {
create_flags,
buffer,
ty,
_ne: _,
} = create_info;
Arc::new(Self {
device: InstanceOwnedDebugWrapper(device),
handle,
id: Self::next_id(),
create_flags,
buffer,
ty,
})
}
/// Returns the flags the acceleration structure was created with.
#[inline]
pub fn create_flags(&self) -> AccelerationStructureCreateFlags {
self.create_flags
}
/// Returns the subbuffer that the acceleration structure is stored on.
#[inline]
pub fn buffer(&self) -> &Subbuffer<[u8]> {
&self.buffer
}
/// Returns the size of the acceleration structure.
#[inline]
pub fn size(&self) -> DeviceSize {
self.buffer.size()
}
/// Returns the type of the acceleration structure.
#[inline]
pub fn ty(&self) -> AccelerationStructureType {
self.ty
}
/// Returns the device address of the acceleration structure.
///
/// The device address of the acceleration structure may be different from the device address
/// of the underlying buffer.
pub fn device_address(&self) -> NonNullDeviceAddress {
let info_vk = ash::vk::AccelerationStructureDeviceAddressInfoKHR {
acceleration_structure: self.handle,
..Default::default()
};
let ptr = unsafe {
let fns = self.device.fns();
(fns.khr_acceleration_structure
.get_acceleration_structure_device_address_khr)(
self.device.handle(), &info_vk
)
};
NonNullDeviceAddress::new(ptr).unwrap()
}
}
impl Drop for AccelerationStructure {
#[inline]
fn drop(&mut self) {
unsafe {
let fns = self.device.fns();
(fns.khr_acceleration_structure
.destroy_acceleration_structure_khr)(
self.device.handle(), self.handle, ptr::null()
)
}
}
}
unsafe impl VulkanObject for AccelerationStructure {
type Handle = ash::vk::AccelerationStructureKHR;
#[inline]
fn handle(&self) -> Self::Handle {
self.handle
}
}
unsafe impl DeviceOwned for AccelerationStructure {
#[inline]
fn device(&self) -> &Arc<Device> {
&self.device
}
}
impl_id_counter!(AccelerationStructure);
vulkan_enum! {
#[non_exhaustive]
/// The type of an acceleration structure.
AccelerationStructureType = AccelerationStructureTypeKHR(i32);
/// Refers to bottom-level acceleration structures. This type can be bound to a descriptor.
TopLevel = TOP_LEVEL,
/// Contains AABBs or geometry to be intersected.
BottomLevel = BOTTOM_LEVEL,
/// The type is determined at build time.
///
/// Use of this type is discouraged, it is preferred to specify the type at create time.
Generic = GENERIC,
}
/// Parameters to create a new `AccelerationStructure`.
#[derive(Clone, Debug)]
pub struct AccelerationStructureCreateInfo {
/// Specifies how to create the acceleration structure.
///
/// The default value is empty.
pub create_flags: AccelerationStructureCreateFlags,
/// The subbuffer to store the acceleration structure on.
///
/// The subbuffer must have an `offset` that is a multiple of 256, and its `usage` must include
/// [`BufferUsage::ACCELERATION_STRUCTURE_STORAGE`]. It must not be accessed while it is bound
/// to the acceleration structure.
///
/// There is no default value.
pub buffer: Subbuffer<[u8]>,
/// The type of acceleration structure to create.
///
/// The default value is [`AccelerationStructureType::Generic`].
pub ty: AccelerationStructureType,
/* TODO: enable
// TODO: document
pub device_address: DeviceAddress, */
pub _ne: crate::NonExhaustive,
}
impl AccelerationStructureCreateInfo {
/// Returns a `AccelerationStructureCreateInfo` with the specified `buffer`.
#[inline]
pub fn new(buffer: Subbuffer<[u8]>) -> Self {
Self {
create_flags: AccelerationStructureCreateFlags::empty(),
buffer,
ty: AccelerationStructureType::Generic,
_ne: crate::NonExhaustive(()),
}
}
pub(crate) fn validate(&self, device: &Device) -> Result<(), Box<ValidationError>> {
let &Self {
create_flags,
ref buffer,
ty,
_ne: _,
} = self;
create_flags.validate_device(device).map_err(|err| {
err.add_context("create_flags")
.set_vuids(&["VUID-VkAccelerationStructureCreateInfoKHR-createFlags-parameter"])
})?;
ty.validate_device(device).map_err(|err| {
err.add_context("ty")
.set_vuids(&["VUID-VkAccelerationStructureCreateInfoKHR-type-parameter"])
})?;
if !buffer
.buffer()
.usage()
.intersects(BufferUsage::ACCELERATION_STRUCTURE_STORAGE)
{
return Err(Box::new(ValidationError {
context: "buffer".into(),
problem: "the buffer was not created with the `ACCELERATION_STRUCTURE_STORAGE` \
usage"
.into(),
vuids: &["VUID-VkAccelerationStructureCreateInfoKHR-buffer-03614"],
..Default::default()
}));
}
// VUID-VkAccelerationStructureCreateInfoKHR-offset-03616
// Ensured by the definition of `Subbuffer`.
if buffer.offset() % 256 != 0 {
return Err(Box::new(ValidationError {
context: "buffer".into(),
problem: "the offset of the buffer is not a multiple of 256".into(),
vuids: &["VUID-VkAccelerationStructureCreateInfoKHR-offset-03734"],
..Default::default()
}));
}
Ok(())
}
}
vulkan_bitflags! {
#[non_exhaustive]
/// Flags that control how an acceleration structure is created.
AccelerationStructureCreateFlags = AccelerationStructureCreateFlagsKHR(u32);
/* TODO: enable
// TODO: document
DEVICE_ADDRESS_CAPTURE_REPLAY = DEVICE_ADDRESS_CAPTURE_REPLAY_KHR, */
/* TODO: enable
// TODO: document
DESCRIPTOR_BUFFER_CAPTURE_REPLAY = DESCRIPTOR_BUFFER_CAPTURE_REPLAY_EXT
RequiresOneOf([
RequiresAllOf([DeviceExtension(ext_descriptor_buffer)]),
]),*/
/* TODO: enable
// TODO: document
MOTION = MOTION_NV
RequiresOneOf([
RequiresAllOf([DeviceExtension(nv_ray_tracing_motion_blur)]),
]),*/
}
/// Geometries and other parameters for an acceleration structure build operation.
#[derive(Clone, Debug)]
pub struct AccelerationStructureBuildGeometryInfo {
/// Specifies how to build the acceleration structure.
///
/// The default value is empty.
pub flags: BuildAccelerationStructureFlags,
/// The mode that the build command should operate in.
///
/// This is ignored when calling [`Device::acceleration_structure_build_sizes`].
///
/// The default value is [`BuildAccelerationStructureMode::Build`].
pub mode: BuildAccelerationStructureMode,
/// The acceleration structure to build or update.
///
/// This can be `None` when calling [`Device::acceleration_structure_build_sizes`],
/// but must be `Some` otherwise.
///
/// There is no default value.
pub dst_acceleration_structure: Option<Arc<AccelerationStructure>>,
/// The geometries that will be built into `dst_acceleration_structure`.
///
/// The geometry type must match the `ty` that was specified when the acceleration structure
/// was created:
/// - `Instances` must be used with `TopLevel` or `Generic`.
/// - `Triangles` and `Aabbs` must be used with `BottomLevel` or `Generic`.
///
/// There is no default value.
pub geometries: AccelerationStructureGeometries,
/// Scratch memory to be used for the build.
///
/// This can be `None` when calling [`Device::acceleration_structure_build_sizes`],
/// but must be `Some` otherwise.
///
/// The default value is `None`.
pub scratch_data: Option<Subbuffer<[u8]>>,
pub _ne: crate::NonExhaustive,
}
impl AccelerationStructureBuildGeometryInfo {
/// Returns a `AccelerationStructureBuildGeometryInfo` with the specified `geometries`.
#[inline]
pub fn new(geometries: AccelerationStructureGeometries) -> Self {
Self {
flags: BuildAccelerationStructureFlags::empty(),
mode: BuildAccelerationStructureMode::Build,
dst_acceleration_structure: None,
geometries,
scratch_data: None,
_ne: crate::NonExhaustive(()),
}
}
pub(crate) fn validate(&self, device: &Device) -> Result<(), Box<ValidationError>> {
let &Self {
flags,
ref mode,
ref dst_acceleration_structure,
ref geometries,
scratch_data: _,
_ne: _,
} = self;
flags.validate_device(device).map_err(|err| {
err.add_context("flags")
.set_vuids(&["VUID-VkAccelerationStructureBuildGeometryInfoKHR-flags-parameter"])
})?;
let max_geometry_count = device
.physical_device()
.properties()
.max_geometry_count
.unwrap();
match geometries {
// VUID-VkAccelerationStructureGeometryKHR-triangles-parameter
AccelerationStructureGeometries::Triangles(geometries) => {
for (index, triangles_data) in geometries.iter().enumerate() {
triangles_data
.validate(device)
.map_err(|err| err.add_context(format!("geometries[{}]", index)))?;
}
if geometries.len() as u64 > max_geometry_count {
return Err(Box::new(ValidationError {
context: "geometries".into(),
problem: "the length exceeds the `max_geometry_count` limit".into(),
vuids: &["VUID-VkAccelerationStructureBuildGeometryInfoKHR-type-03793"],
..Default::default()
}));
}
// VUID-VkAccelerationStructureBuildGeometryInfoKHR-type-03795
// Is checked in the top-level functions.
}
// VUID-VkAccelerationStructureGeometryKHR-aabbs-parameter
AccelerationStructureGeometries::Aabbs(geometries) => {
for (index, aabbs_data) in geometries.iter().enumerate() {
aabbs_data
.validate(device)
.map_err(|err| err.add_context(format!("geometries[{}]", index)))?;
}
if geometries.len() as u64 > max_geometry_count {
return Err(Box::new(ValidationError {
context: "geometries".into(),
problem: "the length exceeds the `max_geometry_count` limit".into(),
vuids: &["VUID-VkAccelerationStructureBuildGeometryInfoKHR-type-03793"],
..Default::default()
}));
}
// VUID-VkAccelerationStructureBuildGeometryInfoKHR-type-03794
// Is checked in the top-level functions.
}
// VUID-VkAccelerationStructureGeometryKHR-instances-parameter
AccelerationStructureGeometries::Instances(instances_data) => {
instances_data
.validate(device)
.map_err(|err| err.add_context("geometries"))?;
}
}
if let Some(dst_acceleration_structure) = dst_acceleration_structure {
// VUID-VkAccelerationStructureBuildGeometryInfoKHR-commonparent
assert_eq!(device, dst_acceleration_structure.device().as_ref());
}
if let BuildAccelerationStructureMode::Update(src_acceleration_structure) = mode {
assert_eq!(device, src_acceleration_structure.device().as_ref());
}
if flags.contains(
BuildAccelerationStructureFlags::PREFER_FAST_TRACE
| BuildAccelerationStructureFlags::PREFER_FAST_BUILD,
) {
return Err(Box::new(ValidationError {
context: "flags".into(),
problem: "contains both `BuildAccelerationStructureFlags::PREFER_FAST_TRACE` and \
`BuildAccelerationStructureFlags::PREFER_FAST_BUILD`"
.into(),
vuids: &["VUID-VkAccelerationStructureBuildGeometryInfoKHR-flags-03796"],
..Default::default()
}));
}
Ok(())
}
pub(crate) fn to_vulkan(
&self,
) -> (
ash::vk::AccelerationStructureBuildGeometryInfoKHR,
Vec<ash::vk::AccelerationStructureGeometryKHR>,
) {
let &Self {
flags,
ref mode,
ref dst_acceleration_structure,
ref geometries,
ref scratch_data,
_ne: _,
} = self;
let (ty, geometries_vk): (_, Vec<_>) = match geometries {
AccelerationStructureGeometries::Triangles(geometries) => (
ash::vk::AccelerationStructureTypeKHR::BOTTOM_LEVEL,
geometries
.iter()
.map(|triangles_data| {
let &AccelerationStructureGeometryTrianglesData {
flags,
vertex_format,
ref vertex_data,
vertex_stride,
max_vertex,
ref index_data,
ref transform_data,
_ne,
} = triangles_data;
ash::vk::AccelerationStructureGeometryKHR {
geometry_type: ash::vk::GeometryTypeKHR::TRIANGLES,
geometry: ash::vk::AccelerationStructureGeometryDataKHR {
triangles: ash::vk::AccelerationStructureGeometryTrianglesDataKHR {
vertex_format: vertex_format.into(),
vertex_data: ash::vk::DeviceOrHostAddressConstKHR {
device_address: vertex_data.as_ref().map_or(
0,
|vertex_data| {
vertex_data.device_address().unwrap().into()
},
),
},
vertex_stride: vertex_stride as DeviceSize,
max_vertex,
index_type: index_data
.as_ref()
.map_or(ash::vk::IndexType::NONE_KHR, |index_data| {
index_data.index_type().into()
}),
index_data: ash::vk::DeviceOrHostAddressConstKHR {
device_address: index_data.as_ref().map_or(
0,
|index_data| {
index_data
.as_bytes()
.device_address()
.unwrap()
.get()
},
),
},
transform_data: ash::vk::DeviceOrHostAddressConstKHR {
device_address: transform_data.as_ref().map_or(
0,
|transform_data| {
transform_data.device_address().unwrap().get()
},
),
},
..Default::default()
},
},
flags: flags.into(),
..Default::default()
}
})
.collect(),
),
AccelerationStructureGeometries::Aabbs(geometries) => (
ash::vk::AccelerationStructureTypeKHR::BOTTOM_LEVEL,
geometries
.iter()
.map(|aabbs_data| {
let &AccelerationStructureGeometryAabbsData {
flags,
ref data,
stride,
_ne: _,
} = aabbs_data;
ash::vk::AccelerationStructureGeometryKHR {
geometry_type: ash::vk::GeometryTypeKHR::AABBS,
geometry: ash::vk::AccelerationStructureGeometryDataKHR {
aabbs: ash::vk::AccelerationStructureGeometryAabbsDataKHR {
data: ash::vk::DeviceOrHostAddressConstKHR {
device_address: data.as_ref().map_or(0, |data| {
data.device_address().unwrap().into()
}),
},
stride: stride as DeviceSize,
..Default::default()
},
},
flags: flags.into(),
..Default::default()
}
})
.collect(),
),
AccelerationStructureGeometries::Instances(instances_data) => {
(ash::vk::AccelerationStructureTypeKHR::TOP_LEVEL, {
let &AccelerationStructureGeometryInstancesData {
flags,
ref data,
_ne: _,
} = instances_data;
let (array_of_pointers, data) = match data {
AccelerationStructureGeometryInstancesDataType::Values(data) => (
ash::vk::FALSE,
ash::vk::DeviceOrHostAddressConstKHR {
device_address: data
.as_ref()
.map_or(0, |data| data.device_address().unwrap().into()),
},
),
AccelerationStructureGeometryInstancesDataType::Pointers(data) => (
ash::vk::TRUE,
ash::vk::DeviceOrHostAddressConstKHR {
device_address: data
.as_ref()
.map_or(0, |data| data.device_address().unwrap().into()),
},
),
};
[ash::vk::AccelerationStructureGeometryKHR {
geometry_type: ash::vk::GeometryTypeKHR::INSTANCES,
geometry: ash::vk::AccelerationStructureGeometryDataKHR {
instances: ash::vk::AccelerationStructureGeometryInstancesDataKHR {
array_of_pointers,
data,
..Default::default()
},
},
flags: flags.into(),
..Default::default()
}]
.into_iter()
.collect()
})
}
};
(
ash::vk::AccelerationStructureBuildGeometryInfoKHR {
ty,
flags: flags.into(),
mode: mode.into(),
src_acceleration_structure: match mode {
BuildAccelerationStructureMode::Build => Default::default(),
BuildAccelerationStructureMode::Update(src_acceleration_structure) => {
src_acceleration_structure.handle()
}
},
dst_acceleration_structure: dst_acceleration_structure
.as_ref()
.map_or_else(Default::default, VulkanObject::handle),
geometry_count: 0,
p_geometries: ptr::null(),
pp_geometries: ptr::null(),
scratch_data: ash::vk::DeviceOrHostAddressKHR {
device_address: scratch_data.as_ref().map_or(0, |scratch_data| {
scratch_data.device_address().unwrap().into()
}),
},
..Default::default()
},
geometries_vk,
)
}
}
vulkan_bitflags! {
#[non_exhaustive]
/// Flags to control how an acceleration structure should be built.
BuildAccelerationStructureFlags = BuildAccelerationStructureFlagsKHR(u32);
/// The built acceleration structure can be updated later by building it again with
/// [`BuildAccelerationStructureMode::Update`].
///
/// The building process may take more time and memory than normal.
ALLOW_UPDATE = ALLOW_UPDATE,
/// The built acceleration structure can be used later as the source in a copy operation with
/// [`CopyAccelerationStructureMode::Compact`].
///
/// The building process may take more time and memory than normal.
ALLOW_COMPACTION = ALLOW_COMPACTION,
/// Prioritize for best trace performance, with possibly longer build times.
PREFER_FAST_TRACE = PREFER_FAST_TRACE,
/// Prioritize for shorter build time, with possibly suboptimal trace performance.
PREFER_FAST_BUILD = PREFER_FAST_BUILD,
/// Prioritize low acceleration structure and scratch memory size, with possibly longer build
/// times or suboptimal trace performance.
LOW_MEMORY = LOW_MEMORY,
/* TODO: enable
// TODO: document
MOTION = MOTION_NV
RequiresOneOf([
RequiresAllOf([DeviceExtension(nv_ray_tracing_motion_blur)]),
]), */
/* TODO: enable
// TODO: document
ALLOW_OPACITY_MICROMAP_UPDATE = ALLOW_OPACITY_MICROMAP_UPDATE_EXT
RequiresOneOf([
RequiresAllOf([DeviceExtension(ext_opacity_micromap)]),
]), */
/* TODO: enable
// TODO: document
ALLOW_DISABLE_OPACITY_MICROMAPS = ALLOW_DISABLE_OPACITY_MICROMAPS_EXT
RequiresOneOf([
RequiresAllOf([DeviceExtension(ext_opacity_micromap)]),
]), */
/* TODO: enable
// TODO: document
ALLOW_OPACITY_MICROMAP_DATA_UPDATE = ALLOW_OPACITY_MICROMAP_DATA_UPDATE_EXT
RequiresOneOf([
RequiresAllOf([DeviceExtension(ext_opacity_micromap)]),
]), */
/* TODO: enable
// TODO: document
ALLOW_DISPLACEMENT_MICROMAP_UPDATE = ALLOW_DISPLACEMENT_MICROMAP_UPDATE_NV
RequiresOneOf([
RequiresAllOf([DeviceExtension(nv_displacement_micromap)]),
]), */
}
/// What mode an acceleration structure build command should operate in.
#[derive(Clone, Debug)]
#[repr(i32)]
pub enum BuildAccelerationStructureMode {
/// Build a new acceleration structure from scratch.
Build = ash::vk::BuildAccelerationStructureModeKHR::BUILD.as_raw(),
/// Update a previously built source acceleration structure with new data, storing the
/// updated structure in the destination. The source and destination acceleration structures
/// may be the same, which will do the update in-place.
///
/// The destination acceleration structure must have been built with the
/// [`BuildAccelerationStructureFlags::ALLOW_UPDATE`] flag.
Update(Arc<AccelerationStructure>) =
ash::vk::BuildAccelerationStructureModeKHR::UPDATE.as_raw(),
}
impl From<&BuildAccelerationStructureMode> for ash::vk::BuildAccelerationStructureModeKHR {
#[inline]
fn from(val: &BuildAccelerationStructureMode) -> Self {
match val {
BuildAccelerationStructureMode::Build => {
ash::vk::BuildAccelerationStructureModeKHR::BUILD
}
BuildAccelerationStructureMode::Update(_) => {
ash::vk::BuildAccelerationStructureModeKHR::UPDATE
}
}
}
}
/// The type of geometry data in an acceleration structure.
#[derive(Clone, Debug)]
pub enum AccelerationStructureGeometries {
/// The geometries consist of bottom-level triangles data.
Triangles(Vec<AccelerationStructureGeometryTrianglesData>),
/// The geometries consist of bottom-level axis-aligned bounding box data.
Aabbs(Vec<AccelerationStructureGeometryAabbsData>),
/// The geometries consist of top-level instance data.
Instances(AccelerationStructureGeometryInstancesData),
}
impl AccelerationStructureGeometries {
/// Returns the number of geometries.
#[inline]
pub fn len(&self) -> usize {
match self {
AccelerationStructureGeometries::Triangles(geometries) => geometries.len(),
AccelerationStructureGeometries::Aabbs(geometries) => geometries.len(),
AccelerationStructureGeometries::Instances(_) => 1,
}
}
}
impl From<Vec<AccelerationStructureGeometryTrianglesData>> for AccelerationStructureGeometries {
#[inline]
fn from(value: Vec<AccelerationStructureGeometryTrianglesData>) -> Self {
Self::Triangles(value)
}
}
impl From<Vec<AccelerationStructureGeometryAabbsData>> for AccelerationStructureGeometries {
#[inline]
fn from(value: Vec<AccelerationStructureGeometryAabbsData>) -> Self {
Self::Aabbs(value)
}
}
impl From<AccelerationStructureGeometryInstancesData> for AccelerationStructureGeometries {
#[inline]
fn from(value: AccelerationStructureGeometryInstancesData) -> Self {
Self::Instances(value)
}
}
vulkan_bitflags! {
#[non_exhaustive]
/// Flags to control how an acceleration structure geometry should be built.
GeometryFlags = GeometryFlagsKHR(u32);
/// The geometry does not invoke the any-hit shaders, even if it is present in a hit group.
OPAQUE = OPAQUE,
/// The any-hit shader will never be called more than once for each primitive in the geometry.
NO_DUPLICATE_ANY_HIT_INVOCATION = NO_DUPLICATE_ANY_HIT_INVOCATION,
}
/// A bottom-level geometry consisting of triangles.
#[derive(Clone, Debug)]
pub struct AccelerationStructureGeometryTrianglesData {
/// Specifies how the geometry should be built.
///
/// The default value is empty.
pub flags: GeometryFlags,
/// The format of each vertex in `vertex_data`.
///
/// This works in the same way as formats for vertex buffers.
///
/// There is no default value.
pub vertex_format: Format,
/// The vertex data itself, consisting of an array of `vertex_format` values.
///
/// This can be `None` when calling [`Device::acceleration_structure_build_sizes`],
/// but must be `Some` otherwise.
///
/// The default value is `None`.
pub vertex_data: Option<Subbuffer<[u8]>>,
/// The number of bytes between the start of successive elements in `vertex_data`.
///
/// This must be a multiple of the smallest component size (in bytes) of `vertex_format`.
///
/// The default value is 0, which must be overridden.
pub vertex_stride: u32,
/// The highest vertex index that may be read from `vertex_data`.
///
/// The default value is 0, which must be overridden.
pub max_vertex: u32,
/// If indices are to be used, the buffer holding the index data.
///
/// The indices will be used to index into the elements of `vertex_data`.
///
/// The default value is `None`.
pub index_data: Option<IndexBuffer>,
/// Optionally, a 3x4 matrix that will be used to transform the vertices in
/// `vertex_data` to the space in which the acceleration structure is defined.
///
/// The first three columns must be a 3x3 invertible matrix.
///
/// The default value is `None`.
pub transform_data: Option<Subbuffer<TransformMatrix>>,
pub _ne: crate::NonExhaustive,
}
impl AccelerationStructureGeometryTrianglesData {
/// Returns a `AccelerationStructureGeometryTrianglesData` with the specified
/// `vertex_format`.
#[inline]
pub fn new(vertex_format: Format) -> Self {
Self {
flags: GeometryFlags::empty(),
vertex_format,
vertex_data: None,
vertex_stride: 0,
max_vertex: 0,
index_data: None,
transform_data: None,
_ne: crate::NonExhaustive(()),
}
}
pub(crate) fn validate(&self, device: &Device) -> Result<(), Box<ValidationError>> {
let &Self {
flags,
vertex_format,
vertex_data: _,
vertex_stride,
max_vertex: _,
ref index_data,
transform_data: _,
_ne: _,
} = self;
flags.validate_device(device).map_err(|err| {
err.add_context("flags")
.set_vuids(&["VUID-VkAccelerationStructureGeometryKHR-flags-parameter"])
})?;
vertex_format.validate_device(device).map_err(|err| {
err.add_context("vertex_format").set_vuids(&[
"VUID-VkAccelerationStructureGeometryTrianglesDataKHR-vertexFormat-parameter",
])
})?;
if unsafe {
!device
.physical_device()
.format_properties_unchecked(vertex_format)
.buffer_features
.intersects(FormatFeatures::ACCELERATION_STRUCTURE_VERTEX_BUFFER)
} {
return Err(Box::new(ValidationError {
context: "vertex_format".into(),
problem: "format features do not contain \
`FormatFeature::ACCELERATION_STRUCTURE_VERTEX_BUFFER`"
.into(),
vuids: &["VUID-VkAccelerationStructureGeometryTrianglesDataKHR-vertexFormat-03797"],
..Default::default()
}));
}
let smallest_component_bits = vertex_format
.components()
.into_iter()
.filter(|&c| c != 0)
.min()
.unwrap() as u32;
let smallest_component_bytes = ((smallest_component_bits + 7) & !7) / 8;
if vertex_stride % smallest_component_bytes != 0 {
return Err(Box::new(ValidationError {
problem: "`vertex_stride` is not a multiple of the byte size of the \
smallest component of `vertex_format`"
.into(),
vuids: &["VUID-VkAccelerationStructureGeometryTrianglesDataKHR-vertexStride-03735"],
..Default::default()
}));
}
if let Some(index_data) = index_data.as_ref() {
if !matches!(index_data, IndexBuffer::U16(_) | IndexBuffer::U32(_)) {
return Err(Box::new(ValidationError {
context: "index_data".into(),
problem: "is not `IndexBuffer::U16` or `IndexBuffer::U32`".into(),
vuids: &[
"VUID-VkAccelerationStructureGeometryTrianglesDataKHR-indexType-03798",
],
..Default::default()
}));
}
}
Ok(())
}
}
/// A 3x4 transformation matrix.
///
/// The first three columns must be a 3x3 invertible matrix.
pub type TransformMatrix = [[f32; 4]; 3];
/// A bottom-level geometry consisting of axis-aligned bounding boxes.
#[derive(Clone, Debug)]
pub struct AccelerationStructureGeometryAabbsData {
/// Specifies how the geometry should be built.
///
/// The default value is empty.
pub flags: GeometryFlags,
/// The AABB data itself, consisting of an array of [`AabbPositions`] structs.
///
/// This can be `None` when calling [`Device::acceleration_structure_build_sizes`],
/// but must be `Some` otherwise.
///
/// The default value is `None`.
pub data: Option<Subbuffer<[u8]>>,
/// The number of bytes between the start of successive elements in `data`.
///
/// This must be a multiple of 8.
///
/// The default value is 0, which must be overridden.
pub stride: u32,
pub _ne: crate::NonExhaustive,
}
impl Default for AccelerationStructureGeometryAabbsData {
#[inline]
fn default() -> Self {
Self {
flags: GeometryFlags::empty(),
data: None,
stride: 0,
_ne: crate::NonExhaustive(()),
}
}
}
impl AccelerationStructureGeometryAabbsData {
pub(crate) fn validate(&self, device: &Device) -> Result<(), Box<ValidationError>> {
let &Self {
flags,
data: _,
stride,
_ne: _,
} = self;
flags.validate_device(device).map_err(|err| {
err.add_context("flags")
.set_vuids(&["VUID-VkAccelerationStructureGeometryKHR-flags-parameter"])
})?;
if stride % 8 != 0 {
return Err(Box::new(ValidationError {
context: "stride".into(),
problem: "is not a multiple of 8".into(),
vuids: &["VUID-VkAccelerationStructureGeometryAabbsDataKHR-stride-03545"],
..Default::default()
}));
}
Ok(())
}
}
/// Specifies two opposing corners of an axis-aligned bounding box.
///
/// Each value in `min` must be less than or equal to the corresponding value in `max`.
#[derive(Clone, Copy, Debug, Default, PartialEq, Zeroable, Pod)]
#[repr(C)]
pub struct AabbPositions {
/// The minimum of the corner coordinates of the bounding box.
///
/// The default value is `[0.0; 3]`.
pub min: [f32; 3],
/// The maximum of the corner coordinates of the bounding box.
///
/// The default value is `[0.0; 3]`.
pub max: [f32; 3],
}
/// A top-level geometry consisting of instances of bottom-level acceleration structures.
#[derive(Clone, Debug)]
pub struct AccelerationStructureGeometryInstancesData {
/// Specifies how the geometry should be built.
///
/// The default value is empty.
pub flags: GeometryFlags,
/// The instance data itself.
///
/// There is no default value.
pub data: AccelerationStructureGeometryInstancesDataType,
pub _ne: crate::NonExhaustive,
}
impl AccelerationStructureGeometryInstancesData {
/// Returns a `AccelerationStructureGeometryInstancesData` with the specified `data`.
#[inline]
pub fn new(data: AccelerationStructureGeometryInstancesDataType) -> Self {
Self {
flags: GeometryFlags::empty(),
data,
_ne: crate::NonExhaustive(()),
}
}
pub(crate) fn validate(&self, device: &Device) -> Result<(), Box<ValidationError>> {
let &Self {
flags,
data: _,
_ne: _,
} = self;
flags.validate_device(device).map_err(|err| {
err.add_context("flags")
.set_vuids(&["VUID-VkAccelerationStructureGeometryKHR-flags-parameter"])
})?;
Ok(())
}
}
/// The data type of an instances geometry.
#[derive(Clone, Debug)]
pub enum AccelerationStructureGeometryInstancesDataType {
/// The data buffer contains an array of [`AccelerationStructureInstance`] structures directly.
///
/// The inner value can be `None` when calling [`Device::acceleration_structure_build_sizes`],
/// but must be `Some` otherwise.
Values(Option<Subbuffer<[AccelerationStructureInstance]>>),
/// The data buffer contains an array of pointers to [`AccelerationStructureInstance`]
/// structures.
///
/// The inner value can be `None` when calling [`Device::acceleration_structure_build_sizes`],
/// but must be `Some` otherwise.
Pointers(Option<Subbuffer<[DeviceSize]>>),
}
impl From<Subbuffer<[AccelerationStructureInstance]>>
for AccelerationStructureGeometryInstancesDataType
{
#[inline]
fn from(value: Subbuffer<[AccelerationStructureInstance]>) -> Self {
Self::Values(Some(value))
}
}
impl From<Subbuffer<[DeviceSize]>> for AccelerationStructureGeometryInstancesDataType {
#[inline]
fn from(value: Subbuffer<[DeviceSize]>) -> Self {
Self::Pointers(Some(value))
}
}
/// Specifies a bottom-level acceleration structure instance when
/// building a top-level structure.
#[derive(Clone, Copy, Debug, PartialEq, Zeroable, Pod)]
#[repr(C)]
pub struct AccelerationStructureInstance {
/// A 3x4 transformation matrix to be applied to the bottom-level acceleration structure.
///
/// The first three columns must be a 3x3 invertible matrix.
///
/// The default value is a 3x3 identity matrix, with the fourth column filled with zeroes.
pub transform: TransformMatrix,
/// Low 24 bits: A custom index value to be accessible via the `InstanceCustomIndexKHR`
/// built-in variable in ray shaders. The default value is 0.
///
/// High 8 bits: A visibility mask for the geometry. The instance will not be hit if the
/// cull mask ANDed with this mask is zero. The default value is 0xFF.
pub instance_custom_index_and_mask: Packed24_8,
/// Low 24 bits: An offset used in calculating the binding table index of the hit shader.
/// The default value is 0.
///
/// High 8 bits: [`GeometryInstanceFlags`] to apply to the instance. The `From` trait can be
/// used to convert the flags into a `u8` value. The default value is empty.
pub instance_shader_binding_table_record_offset_and_flags: Packed24_8,
/// The device address of the bottom-level acceleration structure in this instance.
///
/// The default value is 0 (null).
pub acceleration_structure_reference: DeviceAddress,
}
impl Default for AccelerationStructureInstance {
#[inline]
fn default() -> Self {
Self {
transform: [
[1.0, 0.0, 0.0, 0.0],
[0.0, 1.0, 0.0, 0.0],
[0.0, 0.0, 1.0, 0.0],
],
instance_custom_index_and_mask: Packed24_8::new(0, 0xff),
instance_shader_binding_table_record_offset_and_flags: Packed24_8::new(0, 0),
acceleration_structure_reference: 0,
}
}
}
vulkan_bitflags! {
#[non_exhaustive]
/// Flags for an instance in a top-level acceleration structure.
GeometryInstanceFlags = GeometryInstanceFlagsKHR(u32);
/// Disable face culling for the instance.
TRIANGLE_FACING_CULL_DISABLE = TRIANGLE_FACING_CULL_DISABLE,
/// Flip the facing (front vs back) of triangles.
TRIANGLE_FLIP_FACING = TRIANGLE_FLIP_FACING,
/// Geometries in this instance will act as if [`GeometryFlags::OPAQUE`] were specified.
FORCE_OPAQUE = FORCE_OPAQUE,
/// Geometries in this instance will act as if [`GeometryFlags::OPAQUE`] were not specified.
FORCE_NO_OPAQUE = FORCE_NO_OPAQUE,
/* TODO: enable
// TODO: document
FORCE_OPACITY_MICROMAP_2_STATE = FORCE_OPACITY_MICROMAP_2_STATE_EXT
RequiresOneOf([
RequiresAllOf([DeviceExtension(ext_opacity_micromap)]),
]), */
/* TODO: enable
// TODO: document
DISABLE_OPACITY_MICROMAPS = DISABLE_OPACITY_MICROMAPS_EXT
RequiresOneOf([
RequiresAllOf([DeviceExtension(ext_opacity_micromap)]),
]), */
}
impl From<GeometryInstanceFlags> for u8 {
#[inline]
fn from(value: GeometryInstanceFlags) -> Self {
value.0 as u8
}
}
/// Counts and offsets for an acceleration structure build operation.
#[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Zeroable, Pod)]
#[repr(C)]
pub struct AccelerationStructureBuildRangeInfo {
/// The number of primitives.
///
/// The default value is 0.
pub primitive_count: u32,
/// The offset (in bytes) into the buffer holding geometry data,
/// to where the first primitive is stored.
///
/// The default value is 0.
pub primitive_offset: u32,
/// The index of the first vertex to build from.
///
/// This is used only for triangle geometries.
///
/// The default value is 0.
pub first_vertex: u32,
/// The offset (in bytes) into the buffer holding transform matrices,
/// to where the matrix is stored.
///
/// This is used only for triangle geometries.
///
/// The default value is 0.
pub transform_offset: u32,
}
/// Parameters for copying an acceleration structure.
#[derive(Clone, Debug)]
pub struct CopyAccelerationStructureInfo {
/// The acceleration structure to copy from.
///
/// There is no default value.
pub src: Arc<AccelerationStructure>,
/// The acceleration structure to copy into.
///
/// There is no default value.
pub dst: Arc<AccelerationStructure>,
/// Additional operations to perform during the copy.
///
/// The default value is [`CopyAccelerationStructureMode::Clone`].
pub mode: CopyAccelerationStructureMode,
pub _ne: crate::NonExhaustive,
}
impl CopyAccelerationStructureInfo {
/// Returns a `CopyAccelerationStructureInfo` with the specified `src` and `dst`.
#[inline]
pub fn new(src: Arc<AccelerationStructure>, dst: Arc<AccelerationStructure>) -> Self {
Self {
src,
dst,
mode: CopyAccelerationStructureMode::Clone,
_ne: crate::NonExhaustive(()),
}
}
pub(crate) fn validate(&self, device: &Device) -> Result<(), Box<ValidationError>> {
let &Self {
ref src,
ref dst,
mode,
_ne: _,
} = self;
// VUID-VkCopyAccelerationStructureInfoKHR-commonparent
assert_eq!(device, src.device().as_ref());
assert_eq!(device, dst.device().as_ref());
mode.validate_device(device).map_err(|err| {
err.add_context("mode")
.set_vuids(&["VUID-VkCopyAccelerationStructureInfoKHR-mode-parameter"])
})?;
if !matches!(
mode,
CopyAccelerationStructureMode::Compact | CopyAccelerationStructureMode::Clone
) {
return Err(Box::new(ValidationError {
context: "mode".into(),
problem: "is not `CopyAccelerationStructureMode::Compact` or \
`CopyAccelerationStructureMode::Clone`"
.into(),
vuids: &["VUID-VkCopyAccelerationStructureInfoKHR-mode-03410"],
..Default::default()
}));
}
if src.buffer() == dst.buffer() {
return Err(Box::new(ValidationError {
problem: "`src` and `dst` share the same buffer".into(),
vuids: &["VUID-VkCopyAccelerationStructureInfoKHR-dst-07791"],
..Default::default()
}));
}
// VUID-VkCopyAccelerationStructureInfoKHR-src-04963
// TODO: unsafe
// VUID-VkCopyAccelerationStructureInfoKHR-src-03411
// TODO: unsafe
Ok(())
}
}
/// Parameters for copying from an acceleration structure into memory.
#[derive(Clone, Debug)]
pub struct CopyAccelerationStructureToMemoryInfo {
/// The acceleration structure to copy from.
///
/// There is no default value.
pub src: Arc<AccelerationStructure>,
/// The memory to copy the structure to.
///
/// There is no default value.
pub dst: Subbuffer<[u8]>,
/// Additional operations to perform during the copy.
///
/// The default value is [`CopyAccelerationStructureMode::Serialize`].
pub mode: CopyAccelerationStructureMode,
pub _ne: crate::NonExhaustive,
}
impl CopyAccelerationStructureToMemoryInfo {
/// Returns a `CopyAccelerationStructureToMemoryInfo` with the specified `src` and `dst`.
#[inline]
pub fn new(src: Arc<AccelerationStructure>, dst: Subbuffer<[u8]>) -> Self {
Self {
src,
dst,
mode: CopyAccelerationStructureMode::Serialize,
_ne: crate::NonExhaustive(()),
}
}
pub(crate) fn validate(&self, device: &Device) -> Result<(), Box<ValidationError>> {
let &Self {
ref src,
ref dst,
mode,
_ne: _,
} = self;
assert_eq!(device, src.device().as_ref());
assert_eq!(device, dst.device().as_ref());
mode.validate_device(device).map_err(|err| {
err.add_context("mode")
.set_vuids(&["VUID-VkCopyAccelerationStructureToMemoryInfoKHR-mode-parameter"])
})?;
if !matches!(mode, CopyAccelerationStructureMode::Serialize) {
return Err(Box::new(ValidationError {
context: "mode".into(),
problem: "is not `CopyAccelerationStructureMode::Serialize`".into(),
vuids: &["VUID-VkCopyAccelerationStructureToMemoryInfoKHR-mode-03412"],
..Default::default()
}));
}
// VUID-VkCopyAccelerationStructureToMemoryInfoKHR-src-04959
// TODO: unsafe
// VUID-VkCopyAccelerationStructureToMemoryInfoKHR-dst-03561
// TODO: unsafe
Ok(())
}
}
/// Parameters for copying from memory into an acceleration structure.
#[derive(Clone, Debug)]
pub struct CopyMemoryToAccelerationStructureInfo {
/// The memory to copy the structure from.
///
/// There is no default value.
pub src: Subbuffer<[u8]>,
/// The acceleration structure to copy into.
///
/// There is no default value.
pub dst: Arc<AccelerationStructure>,
/// Additional operations to perform during the copy.
///
/// The default value is [`CopyAccelerationStructureMode::Deserialize`].
pub mode: CopyAccelerationStructureMode,
pub _ne: crate::NonExhaustive,
}
impl CopyMemoryToAccelerationStructureInfo {
/// Returns a `CopyMemoryToAccelerationStructureInfo` with the specified `src` and `dst`.
#[inline]
pub fn new(src: Subbuffer<[u8]>, dst: Arc<AccelerationStructure>) -> Self {
Self {
src,
dst,
mode: CopyAccelerationStructureMode::Deserialize,
_ne: crate::NonExhaustive(()),
}
}
pub(crate) fn validate(&self, device: &Device) -> Result<(), Box<ValidationError>> {
let &Self {
ref src,
ref dst,
mode,
_ne: _,
} = self;
assert_eq!(device, src.device().as_ref());
assert_eq!(device, dst.device().as_ref());
mode.validate_device(device).map_err(|err| {
err.add_context("mode")
.set_vuids(&["VUID-VkCopyMemoryToAccelerationStructureInfoKHR-mode-parameter"])
})?;
if !matches!(mode, CopyAccelerationStructureMode::Deserialize) {
return Err(Box::new(ValidationError {
context: "mode".into(),
problem: "is not `CopyAccelerationStructureMode::Deserialize`".into(),
vuids: &["VUID-VkCopyMemoryToAccelerationStructureInfoKHR-mode-03413"],
..Default::default()
}));
}
// VUID-VkCopyMemoryToAccelerationStructureInfoKHR-src-04960
// TODO: unsafe
// VUID-VkCopyMemoryToAccelerationStructureInfoKHR-pInfo-03414
// TODO: unsafe
// VUID-VkCopyMemoryToAccelerationStructureInfoKHR-dst-03746
// TODO: unsafe
Ok(())
}
}
vulkan_enum! {
#[non_exhaustive]
/// What mode an acceleration structure copy command should operate in.
CopyAccelerationStructureMode = CopyAccelerationStructureModeKHR(i32);
/// Copy the source into the destination.
/// This is a shallow copy: if the source holds references to other acceleration structures,
/// only the references are copied, not the other acceleration structures.
///
/// Both source and destination must have been created with the same
/// [`AccelerationStructureCreateInfo`].
Clone = CLONE,
/// Create a more compact version of the source in the destination.
/// This is a shallow copy: if the source holds references to other acceleration structures,
/// only the references are copied, not the other acceleration structures.
///
/// The source acceleration structure must have been built with the
/// [`BuildAccelerationStructureFlags::ALLOW_COMPACTION`] flag.
Compact = COMPACT,
/// Serialize the acceleration structure into data in a semi-opaque format,
/// that can be deserialized by a compatible Vulkan implementation.
Serialize = SERIALIZE,
/// Deserialize data back into an acceleration structure.
Deserialize = DESERIALIZE,
}
vulkan_enum! {
#[non_exhaustive]
/// Where the building of an acceleration structure will take place.
AccelerationStructureBuildType = AccelerationStructureBuildTypeKHR(i32);
/// Building will take place on the host.
Host = HOST,
/// Building will take place on the device.
Device = DEVICE,
/// Building will take place on either the host or the device.
HostOrDevice = HOST_OR_DEVICE,
}
/// The minimum sizes needed for various resources during an acceleration structure build operation.
#[derive(Clone, Debug)]
pub struct AccelerationStructureBuildSizesInfo {
/// The minimum required size of the acceleration structure for a build or update operation.
pub acceleration_structure_size: DeviceSize,
/// The minimum required size of the scratch data buffer for an update operation.
pub update_scratch_size: DeviceSize,
/// The minimum required size of the scratch data buffer for a build operation.
pub build_scratch_size: DeviceSize,
pub _ne: crate::NonExhaustive,
}