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/*!
Type generators.
*/
use crate::{arena::Handle, span::Span};
impl crate::Module {
/// Populate this module's [`SpecialTypes::ray_desc`] type.
///
/// [`SpecialTypes::ray_desc`] is the type of the [`descriptor`] operand of
/// an [`Initialize`] [`RayQuery`] statement. In WGSL, it is a struct type
/// referred to as `RayDesc`.
///
/// Backends consume values of this type to drive platform APIs, so if you
/// change any its fields, you must update the backends to match. Look for
/// backend code dealing with [`RayQueryFunction::Initialize`].
///
/// [`SpecialTypes::ray_desc`]: crate::SpecialTypes::ray_desc
/// [`descriptor`]: crate::RayQueryFunction::Initialize::descriptor
/// [`Initialize`]: crate::RayQueryFunction::Initialize
/// [`RayQuery`]: crate::Statement::RayQuery
/// [`RayQueryFunction::Initialize`]: crate::RayQueryFunction::Initialize
pub fn generate_ray_desc_type(&mut self) -> Handle<crate::Type> {
if let Some(handle) = self.special_types.ray_desc {
return handle;
}
let ty_flag = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Scalar(crate::Scalar::U32),
},
Span::UNDEFINED,
);
let ty_scalar = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Scalar(crate::Scalar::F32),
},
Span::UNDEFINED,
);
let ty_vector = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Vector {
size: crate::VectorSize::Tri,
scalar: crate::Scalar::F32,
},
},
Span::UNDEFINED,
);
let handle = self.types.insert(
crate::Type {
name: Some("RayDesc".to_string()),
inner: crate::TypeInner::Struct {
members: vec![
crate::StructMember {
name: Some("flags".to_string()),
ty: ty_flag,
binding: None,
offset: 0,
},
crate::StructMember {
name: Some("cull_mask".to_string()),
ty: ty_flag,
binding: None,
offset: 4,
},
crate::StructMember {
name: Some("tmin".to_string()),
ty: ty_scalar,
binding: None,
offset: 8,
},
crate::StructMember {
name: Some("tmax".to_string()),
ty: ty_scalar,
binding: None,
offset: 12,
},
crate::StructMember {
name: Some("origin".to_string()),
ty: ty_vector,
binding: None,
offset: 16,
},
crate::StructMember {
name: Some("dir".to_string()),
ty: ty_vector,
binding: None,
offset: 32,
},
],
span: 48,
},
},
Span::UNDEFINED,
);
self.special_types.ray_desc = Some(handle);
handle
}
/// Populate this module's [`SpecialTypes::ray_intersection`] type.
///
/// [`SpecialTypes::ray_intersection`] is the type of a
/// `RayQueryGetIntersection` expression. In WGSL, it is a struct type
/// referred to as `RayIntersection`.
///
/// Backends construct values of this type based on platform APIs, so if you
/// change any its fields, you must update the backends to match. Look for
/// the backend's handling for [`Expression::RayQueryGetIntersection`].
///
/// [`SpecialTypes::ray_intersection`]: crate::SpecialTypes::ray_intersection
/// [`Expression::RayQueryGetIntersection`]: crate::Expression::RayQueryGetIntersection
pub fn generate_ray_intersection_type(&mut self) -> Handle<crate::Type> {
if let Some(handle) = self.special_types.ray_intersection {
return handle;
}
let ty_flag = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Scalar(crate::Scalar::U32),
},
Span::UNDEFINED,
);
let ty_scalar = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Scalar(crate::Scalar::F32),
},
Span::UNDEFINED,
);
let ty_barycentrics = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Vector {
size: crate::VectorSize::Bi,
scalar: crate::Scalar::F32,
},
},
Span::UNDEFINED,
);
let ty_bool = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Scalar(crate::Scalar::BOOL),
},
Span::UNDEFINED,
);
let ty_transform = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Matrix {
columns: crate::VectorSize::Quad,
rows: crate::VectorSize::Tri,
scalar: crate::Scalar::F32,
},
},
Span::UNDEFINED,
);
let handle = self.types.insert(
crate::Type {
name: Some("RayIntersection".to_string()),
inner: crate::TypeInner::Struct {
members: vec![
crate::StructMember {
name: Some("kind".to_string()),
ty: ty_flag,
binding: None,
offset: 0,
},
crate::StructMember {
name: Some("t".to_string()),
ty: ty_scalar,
binding: None,
offset: 4,
},
crate::StructMember {
name: Some("instance_custom_index".to_string()),
ty: ty_flag,
binding: None,
offset: 8,
},
crate::StructMember {
name: Some("instance_id".to_string()),
ty: ty_flag,
binding: None,
offset: 12,
},
crate::StructMember {
name: Some("sbt_record_offset".to_string()),
ty: ty_flag,
binding: None,
offset: 16,
},
crate::StructMember {
name: Some("geometry_index".to_string()),
ty: ty_flag,
binding: None,
offset: 20,
},
crate::StructMember {
name: Some("primitive_index".to_string()),
ty: ty_flag,
binding: None,
offset: 24,
},
crate::StructMember {
name: Some("barycentrics".to_string()),
ty: ty_barycentrics,
binding: None,
offset: 28,
},
crate::StructMember {
name: Some("front_face".to_string()),
ty: ty_bool,
binding: None,
offset: 36,
},
crate::StructMember {
name: Some("object_to_world".to_string()),
ty: ty_transform,
binding: None,
offset: 48,
},
crate::StructMember {
name: Some("world_to_object".to_string()),
ty: ty_transform,
binding: None,
offset: 112,
},
],
span: 176,
},
},
Span::UNDEFINED,
);
self.special_types.ray_intersection = Some(handle);
handle
}
/// Populate this module's [`SpecialTypes::predeclared_types`] type and return the handle.
///
/// [`SpecialTypes::predeclared_types`]: crate::SpecialTypes::predeclared_types
pub fn generate_predeclared_type(
&mut self,
special_type: crate::PredeclaredType,
) -> Handle<crate::Type> {
use std::fmt::Write;
if let Some(value) = self.special_types.predeclared_types.get(&special_type) {
return *value;
}
let ty = match special_type {
crate::PredeclaredType::AtomicCompareExchangeWeakResult(scalar) => {
let bool_ty = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Scalar(crate::Scalar::BOOL),
},
Span::UNDEFINED,
);
let scalar_ty = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Scalar(scalar),
},
Span::UNDEFINED,
);
crate::Type {
name: Some(format!(
"__atomic_compare_exchange_result<{:?},{}>",
scalar.kind, scalar.width,
)),
inner: crate::TypeInner::Struct {
members: vec![
crate::StructMember {
name: Some("old_value".to_string()),
ty: scalar_ty,
binding: None,
offset: 0,
},
crate::StructMember {
name: Some("exchanged".to_string()),
ty: bool_ty,
binding: None,
offset: scalar.width as u32,
},
],
span: scalar.width as u32 * 2,
},
}
}
crate::PredeclaredType::ModfResult { size, width } => {
let float_ty = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Scalar(crate::Scalar::float(width)),
},
Span::UNDEFINED,
);
let (member_ty, second_offset) = if let Some(size) = size {
let vec_ty = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Vector {
size,
scalar: crate::Scalar::float(width),
},
},
Span::UNDEFINED,
);
(vec_ty, size as u32 * width as u32)
} else {
(float_ty, width as u32)
};
let mut type_name = "__modf_result_".to_string();
if let Some(size) = size {
let _ = write!(type_name, "vec{}_", size as u8);
}
let _ = write!(type_name, "f{}", width * 8);
crate::Type {
name: Some(type_name),
inner: crate::TypeInner::Struct {
members: vec![
crate::StructMember {
name: Some("fract".to_string()),
ty: member_ty,
binding: None,
offset: 0,
},
crate::StructMember {
name: Some("whole".to_string()),
ty: member_ty,
binding: None,
offset: second_offset,
},
],
span: second_offset * 2,
},
}
}
crate::PredeclaredType::FrexpResult { size, width } => {
let float_ty = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Scalar(crate::Scalar::float(width)),
},
Span::UNDEFINED,
);
let int_ty = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Scalar(crate::Scalar {
kind: crate::ScalarKind::Sint,
width,
}),
},
Span::UNDEFINED,
);
let (fract_member_ty, exp_member_ty, second_offset) = if let Some(size) = size {
let vec_float_ty = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Vector {
size,
scalar: crate::Scalar::float(width),
},
},
Span::UNDEFINED,
);
let vec_int_ty = self.types.insert(
crate::Type {
name: None,
inner: crate::TypeInner::Vector {
size,
scalar: crate::Scalar {
kind: crate::ScalarKind::Sint,
width,
},
},
},
Span::UNDEFINED,
);
(vec_float_ty, vec_int_ty, size as u32 * width as u32)
} else {
(float_ty, int_ty, width as u32)
};
let mut type_name = "__frexp_result_".to_string();
if let Some(size) = size {
let _ = write!(type_name, "vec{}_", size as u8);
}
let _ = write!(type_name, "f{}", width * 8);
crate::Type {
name: Some(type_name),
inner: crate::TypeInner::Struct {
members: vec![
crate::StructMember {
name: Some("fract".to_string()),
ty: fract_member_ty,
binding: None,
offset: 0,
},
crate::StructMember {
name: Some("exp".to_string()),
ty: exp_member_ty,
binding: None,
offset: second_offset,
},
],
span: second_offset * 2,
},
}
}
};
let handle = self.types.insert(ty, Span::UNDEFINED);
self.special_types
.predeclared_types
.insert(special_type, handle);
handle
}
}