290b7dd9ab
# Objective - Update vendor crevice to have the latest update from crevice 0.8.0 - Using https://github.com/ElectronicRU/crevice/tree/arrays which has the changes to make arrays work ## Solution - Also updated glam and hexasphere to only have one version of glam - From the original PR, using crevice to write GLSL code containing arrays would probably not work but it's not something used by Bevy
50 lines
1.7 KiB
Rust
50 lines
1.7 KiB
Rust
use proc_macro2::{Literal, TokenStream};
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use quote::quote;
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use syn::{parse_quote, Data, DeriveInput, Fields, Path};
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pub fn emit(input: DeriveInput) -> TokenStream {
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let fields = match &input.data {
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Data::Struct(data) => match &data.fields {
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Fields::Named(fields) => fields,
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Fields::Unnamed(_) => panic!("Tuple structs are not supported"),
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Fields::Unit => panic!("Unit structs are not supported"),
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},
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Data::Enum(_) | Data::Union(_) => panic!("Only structs are supported"),
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};
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let base_trait_path: Path = parse_quote!(::crevice::glsl::Glsl);
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let struct_trait_path: Path = parse_quote!(::crevice::glsl::GlslStruct);
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let name = input.ident;
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let name_str = Literal::string(&name.to_string());
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let (impl_generics, ty_generics, where_clause) = input.generics.split_for_impl();
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let glsl_fields = fields.named.iter().map(|field| {
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let field_ty = &field.ty;
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let field_name_str = Literal::string(&field.ident.as_ref().unwrap().to_string());
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let field_as = quote! {<#field_ty as ::crevice::glsl::GlslArray>};
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quote! {
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s.push_str("\t");
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s.push_str(#field_as::NAME);
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s.push_str(" ");
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s.push_str(#field_name_str);
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<#field_as::ArraySize as ::crevice::glsl::DimensionList>::push_to_string(s);
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s.push_str(";\n");
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}
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});
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quote! {
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unsafe impl #impl_generics #base_trait_path for #name #ty_generics #where_clause {
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const NAME: &'static str = #name_str;
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}
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unsafe impl #impl_generics #struct_trait_path for #name #ty_generics #where_clause {
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fn enumerate_fields(s: &mut String) {
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#( #glsl_fields )*
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}
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}
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}
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}
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