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[wgsl-out] Write global initializers

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This commit is contained in:
João Capucho
2021-06-08 18:59:43 +01:00
committed by Dzmitry Malyshau
parent 38f6a79917
commit be2231f6d9
2 changed files with 25 additions and 1 deletions
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24
src/back/wgsl/writer.rs
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@@ -1341,6 +1341,13 @@ impl<W: Write> Writer<W> {
}
// Write global type
self.write_type(module, global.ty)?;
// Write initializer
if let Some(init) = global.init {
write!(self.out, " = ")?;
self.write_constant(module, init)?;
}
// End with semicolon
writeln!(self.out, ";")?;
@@ -1368,8 +1375,25 @@ impl<W: Write> Writer<W> {
self.write_type(module, ty)?;
write!(self.out, "(")?;
let members = match module.types[ty].inner {
TypeInner::Struct { ref members, .. } => Some(members),
_ => None,
};
// Write the comma separated constants
for (index, constant) in components.iter().enumerate() {
if let Some(&Binding::BuiltIn(builtin)) =
members.and_then(|members| members.get(index)?.binding.as_ref())
{
if builtin_str(builtin).is_none() {
log::warn!(
"Skip constant for struct member with unsupported builtin {:?}",
builtin
);
continue;
}
}
self.write_constant(module, *constant)?;
// Only write a comma if isn't the last element
if index != components.len().saturating_sub(1) {

2
tests/out/quad-vert.wgsl
View File

@@ -10,7 +10,7 @@ struct VertexOutput {
var<private> v_uv: vec2<f32>;
var<private> a_uv: vec2<f32>;
var<private> perVertexStruct: gl_PerVertex;
var<private> perVertexStruct: gl_PerVertex = gl_PerVertex(vec4<f32>(0.0, 0.0, 0.0, 1.0), );
var<private> a_pos: vec2<f32>;
fn main() {