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use alloc::format;
use super::{context::Context, Error, ErrorKind, Result, Span};
use crate::{
proc::ResolveContext, Expression, Handle, ImageClass, ImageDimension, Scalar, ScalarKind, Type,
TypeInner, VectorSize,
};
pub fn parse_type(type_name: &str) -> Option<Type> {
match type_name {
"bool" => Some(Type {
name: None,
inner: TypeInner::Scalar(Scalar::BOOL),
}),
"float16_t" => Some(Type {
name: None,
inner: TypeInner::Scalar(Scalar::F16),
}),
"float" => Some(Type {
name: None,
inner: TypeInner::Scalar(Scalar::F32),
}),
"double" => Some(Type {
name: None,
inner: TypeInner::Scalar(Scalar::F64),
}),
"int" => Some(Type {
name: None,
inner: TypeInner::Scalar(Scalar::I32),
}),
"uint" => Some(Type {
name: None,
inner: TypeInner::Scalar(Scalar::U32),
}),
"sampler" | "samplerShadow" => Some(Type {
name: None,
inner: TypeInner::Sampler {
comparison: type_name == "samplerShadow",
},
}),
word => {
fn kind_width_parse(ty: &str) -> Option<Scalar> {
Some(match ty {
"" => Scalar::F32,
"b" => Scalar::BOOL,
"i" => Scalar::I32,
"u" => Scalar::U32,
"d" => Scalar::F64,
"f16" => Scalar::F16,
_ => return None,
})
}
fn size_parse(n: &str) -> Option<VectorSize> {
Some(match n {
"2" => VectorSize::Bi,
"3" => VectorSize::Tri,
"4" => VectorSize::Quad,
_ => return None,
})
}
let vec_parse = |word: &str| {
let mut iter = word.split("vec");
let kind = iter.next()?;
let size = iter.next()?;
let scalar = kind_width_parse(kind)?;
let size = size_parse(size)?;
Some(Type {
name: None,
inner: TypeInner::Vector { size, scalar },
})
};
let mat_parse = |word: &str| {
let mut iter = word.split("mat");
let kind = iter.next()?;
let size = iter.next()?;
let scalar = kind_width_parse(kind)?;
let (columns, rows) = if let Some(size) = size_parse(size) {
(size, size)
} else {
let mut iter = size.split('x');
match (iter.next()?, iter.next()?, iter.next()) {
(col, row, None) => (size_parse(col)?, size_parse(row)?),
_ => return None,
}
};
Some(Type {
name: None,
inner: TypeInner::Matrix {
columns,
rows,
scalar,
},
})
};
let texture_parse = |word: &str| {
let mut iter = word.split("texture");
let texture_kind = |ty| {
Some(match ty {
"" => ScalarKind::Float,
"i" => ScalarKind::Sint,
"u" => ScalarKind::Uint,
_ => return None,
})
};
let kind = iter.next()?;
let size = iter.next()?;
let kind = texture_kind(kind)?;
let sampled = |multi| ImageClass::Sampled { kind, multi };
let (dim, arrayed, class) = match size {
"1D" => (ImageDimension::D1, false, sampled(false)),
"1DArray" => (ImageDimension::D1, true, sampled(false)),
"2D" => (ImageDimension::D2, false, sampled(false)),
"2DArray" => (ImageDimension::D2, true, sampled(false)),
"2DMS" => (ImageDimension::D2, false, sampled(true)),
"2DMSArray" => (ImageDimension::D2, true, sampled(true)),
"3D" => (ImageDimension::D3, false, sampled(false)),
"Cube" => (ImageDimension::Cube, false, sampled(false)),
"CubeArray" => (ImageDimension::Cube, true, sampled(false)),
_ => return None,
};
Some(Type {
name: None,
inner: TypeInner::Image {
dim,
arrayed,
class,
},
})
};
let image_parse = |word: &str| {
let mut iter = word.split("image");
let texture_kind = |ty| {
Some(match ty {
"" => ScalarKind::Float,
"i" => ScalarKind::Sint,
"u" => ScalarKind::Uint,
_ => return None,
})
};
let kind = iter.next()?;
let size = iter.next()?;
// TODO: Check that the texture format and the kind match
let _ = texture_kind(kind)?;
let class = ImageClass::Storage {
format: crate::StorageFormat::R8Uint,
access: crate::StorageAccess::LOAD | crate::StorageAccess::STORE,
};
// TODO: glsl support multisampled storage images, naga doesn't
let (dim, arrayed) = match size {
"1D" => (ImageDimension::D1, false),
"1DArray" => (ImageDimension::D1, true),
"2D" => (ImageDimension::D2, false),
"2DArray" => (ImageDimension::D2, true),
"3D" => (ImageDimension::D3, false),
// Naga doesn't support cube images and it's usefulness
// is questionable, so they won't be supported for now
// "Cube" => (ImageDimension::Cube, false),
// "CubeArray" => (ImageDimension::Cube, true),
_ => return None,
};
Some(Type {
name: None,
inner: TypeInner::Image {
dim,
arrayed,
class,
},
})
};
vec_parse(word)
.or_else(|| mat_parse(word))
.or_else(|| texture_parse(word))
.or_else(|| image_parse(word))
}
}
}
pub const fn scalar_components(ty: &TypeInner) -> Option<Scalar> {
match *ty {
TypeInner::Scalar(scalar)
| TypeInner::Vector { scalar, .. }
| TypeInner::ValuePointer { scalar, .. }
| TypeInner::Matrix { scalar, .. } => Some(scalar),
_ => None,
}
}
pub const fn type_power(scalar: Scalar) -> Option<u32> {
Some(match scalar.kind {
ScalarKind::Sint => 0,
ScalarKind::Uint => 1,
ScalarKind::Float if scalar.width == 4 => 2,
ScalarKind::Float => 3,
ScalarKind::Bool | ScalarKind::AbstractInt | ScalarKind::AbstractFloat => return None,
})
}
impl Context<'_> {
/// Resolves the types of the expressions until `expr` (inclusive)
///
/// This needs to be done before the [`typifier`] can be queried for
/// the types of the expressions in the range between the last grow and `expr`.
///
/// # Note
///
/// The `resolve_type*` methods (like [`resolve_type`]) automatically
/// grow the [`typifier`] so calling this method is not necessary when using
/// them.
///
/// [`typifier`]: Context::typifier
/// [`resolve_type`]: Self::resolve_type
pub(crate) fn typifier_grow(&mut self, expr: Handle<Expression>, meta: Span) -> Result<()> {
let resolve_ctx = ResolveContext::with_locals(self.module, &self.locals, &self.arguments);
let typifier = if self.is_const {
&mut self.const_typifier
} else {
&mut self.typifier
};
let expressions = if self.is_const {
&self.module.global_expressions
} else {
&self.expressions
};
typifier
.grow(expr, expressions, &resolve_ctx)
.map_err(|error| Error {
kind: ErrorKind::SemanticError(format!("Can't resolve type: {error:?}").into()),
meta,
})
}
pub(crate) fn get_type(&self, expr: Handle<Expression>) -> &TypeInner {
let typifier = if self.is_const {
&self.const_typifier
} else {
&self.typifier
};
typifier.get(expr, &self.module.types)
}
/// Gets the type for the result of the `expr` expression
///
/// Automatically grows the [`typifier`] to `expr` so calling
/// [`typifier_grow`] is not necessary
///
/// [`typifier`]: Context::typifier
/// [`typifier_grow`]: Self::typifier_grow
pub(crate) fn resolve_type(
&mut self,
expr: Handle<Expression>,
meta: Span,
) -> Result<&TypeInner> {
self.typifier_grow(expr, meta)?;
Ok(self.get_type(expr))
}
/// Gets the type handle for the result of the `expr` expression
///
/// Automatically grows the [`typifier`] to `expr` so calling
/// [`typifier_grow`] is not necessary
///
/// # Note
///
/// Consider using [`resolve_type`] whenever possible
/// since it doesn't require adding each type to the [`types`] arena
/// and it doesn't need to mutably borrow the [`Parser`][Self]
///
/// [`types`]: crate::Module::types
/// [`typifier`]: Context::typifier
/// [`typifier_grow`]: Self::typifier_grow
/// [`resolve_type`]: Self::resolve_type
pub(crate) fn resolve_type_handle(
&mut self,
expr: Handle<Expression>,
meta: Span,
) -> Result<Handle<Type>> {
self.typifier_grow(expr, meta)?;
let typifier = if self.is_const {
&mut self.const_typifier
} else {
&mut self.typifier
};
Ok(typifier.register_type(expr, &mut self.module.types))
}
/// Invalidates the cached type resolution for `expr` forcing a recomputation
pub(crate) fn invalidate_expression(
&mut self,
expr: Handle<Expression>,
meta: Span,
) -> Result<()> {
let resolve_ctx = ResolveContext::with_locals(self.module, &self.locals, &self.arguments);
let typifier = if self.is_const {
&mut self.const_typifier
} else {
&mut self.typifier
};
typifier
.invalidate(expr, &self.expressions, &resolve_ctx)
.map_err(|error| Error {
kind: ErrorKind::SemanticError(format!("Can't resolve type: {error:?}").into()),
meta,
})
}
pub(crate) fn lift_up_const_expression(
&mut self,
expr: Handle<Expression>,
) -> Result<Handle<Expression>> {
let meta = self.expressions.get_span(expr);
let h = match self.expressions[expr] {
ref expr @ (Expression::Literal(_)
| Expression::Constant(_)
| Expression::ZeroValue(_)) => {
self.module.global_expressions.append(expr.clone(), meta)
}
Expression::Compose { ty, ref components } => {
let mut components = components.clone();
for component in &mut components {
*component = self.lift_up_const_expression(*component)?;
}
self.module
.global_expressions
.append(Expression::Compose { ty, components }, meta)
}
Expression::Splat { size, value } => {
let value = self.lift_up_const_expression(value)?;
self.module
.global_expressions
.append(Expression::Splat { size, value }, meta)
}
_ => {
return Err(Error {
kind: ErrorKind::SemanticError("Expression is not const-expression".into()),
meta,
})
}
};
self.global_expression_kind_tracker
.insert(h, crate::proc::ExpressionKind::Const);
Ok(h)
}
}