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/*!
Generating SPIR-V for ray query operations.
*/
use super::{Block, BlockContext, Instruction, LocalType, LookupType, NumericType};
use crate::arena::Handle;
impl<'w> BlockContext<'w> {
pub(super) fn write_ray_query_function(
&mut self,
query: Handle<crate::Expression>,
function: &crate::RayQueryFunction,
block: &mut Block,
) {
let query_id = self.cached[query];
match *function {
crate::RayQueryFunction::Initialize {
acceleration_structure,
descriptor,
} => {
//Note: composite extract indices and types must match `generate_ray_desc_type`
let desc_id = self.cached[descriptor];
let acc_struct_id = self.get_handle_id(acceleration_structure);
let flag_type_id = self.get_type_id(LookupType::Local(LocalType::Numeric(
NumericType::Scalar(crate::Scalar::U32),
)));
let ray_flags_id = self.gen_id();
block.body.push(Instruction::composite_extract(
flag_type_id,
ray_flags_id,
desc_id,
&[0],
));
let cull_mask_id = self.gen_id();
block.body.push(Instruction::composite_extract(
flag_type_id,
cull_mask_id,
desc_id,
&[1],
));
let scalar_type_id = self.get_type_id(LookupType::Local(LocalType::Numeric(
NumericType::Scalar(crate::Scalar::F32),
)));
let tmin_id = self.gen_id();
block.body.push(Instruction::composite_extract(
scalar_type_id,
tmin_id,
desc_id,
&[2],
));
let tmax_id = self.gen_id();
block.body.push(Instruction::composite_extract(
scalar_type_id,
tmax_id,
desc_id,
&[3],
));
let vector_type_id =
self.get_type_id(LookupType::Local(LocalType::Numeric(NumericType::Vector {
size: crate::VectorSize::Tri,
scalar: crate::Scalar::F32,
})));
let ray_origin_id = self.gen_id();
block.body.push(Instruction::composite_extract(
vector_type_id,
ray_origin_id,
desc_id,
&[4],
));
let ray_dir_id = self.gen_id();
block.body.push(Instruction::composite_extract(
vector_type_id,
ray_dir_id,
desc_id,
&[5],
));
block.body.push(Instruction::ray_query_initialize(
query_id,
acc_struct_id,
ray_flags_id,
cull_mask_id,
ray_origin_id,
tmin_id,
ray_dir_id,
tmax_id,
));
}
crate::RayQueryFunction::Proceed { result } => {
let id = self.gen_id();
self.cached[result] = id;
let result_type_id = self.get_expression_type_id(&self.fun_info[result].ty);
block
.body
.push(Instruction::ray_query_proceed(result_type_id, id, query_id));
}
crate::RayQueryFunction::Terminate => {}
}
}
pub(super) fn write_ray_query_get_intersection(
&mut self,
query: Handle<crate::Expression>,
block: &mut Block,
) -> spirv::Word {
let query_id = self.cached[query];
let intersection_id = self.writer.get_constant_scalar(crate::Literal::U32(
spirv::RayQueryIntersection::RayQueryCommittedIntersectionKHR as _,
));
let flag_type_id = self.get_type_id(LookupType::Local(LocalType::Numeric(
NumericType::Scalar(crate::Scalar::U32),
)));
let kind_id = self.gen_id();
block.body.push(Instruction::ray_query_get_intersection(
spirv::Op::RayQueryGetIntersectionTypeKHR,
flag_type_id,
kind_id,
query_id,
intersection_id,
));
let instance_custom_index_id = self.gen_id();
block.body.push(Instruction::ray_query_get_intersection(
spirv::Op::RayQueryGetIntersectionInstanceCustomIndexKHR,
flag_type_id,
instance_custom_index_id,
query_id,
intersection_id,
));
let instance_id = self.gen_id();
block.body.push(Instruction::ray_query_get_intersection(
spirv::Op::RayQueryGetIntersectionInstanceIdKHR,
flag_type_id,
instance_id,
query_id,
intersection_id,
));
let sbt_record_offset_id = self.gen_id();
block.body.push(Instruction::ray_query_get_intersection(
spirv::Op::RayQueryGetIntersectionInstanceShaderBindingTableRecordOffsetKHR,
flag_type_id,
sbt_record_offset_id,
query_id,
intersection_id,
));
let geometry_index_id = self.gen_id();
block.body.push(Instruction::ray_query_get_intersection(
spirv::Op::RayQueryGetIntersectionGeometryIndexKHR,
flag_type_id,
geometry_index_id,
query_id,
intersection_id,
));
let primitive_index_id = self.gen_id();
block.body.push(Instruction::ray_query_get_intersection(
spirv::Op::RayQueryGetIntersectionPrimitiveIndexKHR,
flag_type_id,
primitive_index_id,
query_id,
intersection_id,
));
let scalar_type_id = self.get_type_id(LookupType::Local(LocalType::Numeric(
NumericType::Scalar(crate::Scalar::F32),
)));
let t_id = self.gen_id();
block.body.push(Instruction::ray_query_get_intersection(
spirv::Op::RayQueryGetIntersectionTKHR,
scalar_type_id,
t_id,
query_id,
intersection_id,
));
let barycentrics_type_id =
self.get_type_id(LookupType::Local(LocalType::Numeric(NumericType::Vector {
size: crate::VectorSize::Bi,
scalar: crate::Scalar::F32,
})));
let barycentrics_id = self.gen_id();
block.body.push(Instruction::ray_query_get_intersection(
spirv::Op::RayQueryGetIntersectionBarycentricsKHR,
barycentrics_type_id,
barycentrics_id,
query_id,
intersection_id,
));
let bool_type_id = self.get_type_id(LookupType::Local(LocalType::Numeric(
NumericType::Scalar(crate::Scalar::BOOL),
)));
let front_face_id = self.gen_id();
block.body.push(Instruction::ray_query_get_intersection(
spirv::Op::RayQueryGetIntersectionFrontFaceKHR,
bool_type_id,
front_face_id,
query_id,
intersection_id,
));
let transform_type_id =
self.get_type_id(LookupType::Local(LocalType::Numeric(NumericType::Matrix {
columns: crate::VectorSize::Quad,
rows: crate::VectorSize::Tri,
scalar: crate::Scalar::F32,
})));
let object_to_world_id = self.gen_id();
block.body.push(Instruction::ray_query_get_intersection(
spirv::Op::RayQueryGetIntersectionObjectToWorldKHR,
transform_type_id,
object_to_world_id,
query_id,
intersection_id,
));
let world_to_object_id = self.gen_id();
block.body.push(Instruction::ray_query_get_intersection(
spirv::Op::RayQueryGetIntersectionWorldToObjectKHR,
transform_type_id,
world_to_object_id,
query_id,
intersection_id,
));
let id = self.gen_id();
let intersection_type_id = self.get_type_id(LookupType::Handle(
self.ir_module.special_types.ray_intersection.unwrap(),
));
//Note: the arguments must match `generate_ray_intersection_type` layout
block.body.push(Instruction::composite_construct(
intersection_type_id,
id,
&[
kind_id,
t_id,
instance_custom_index_id,
instance_id,
sbt_record_offset_id,
geometry_index_id,
primitive_index_id,
barycentrics_id,
front_face_id,
object_to_world_id,
world_to_object_id,
],
));
id
}
}